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Background: The invasive eel parasite Anguillicoloides crassus (syn. Anguillicola crassus) is considered one of the major causes for the decline of the European eel (Anguilla anguilla) panmictic population. It impairs the swim bladder function and reduces swimming performance of its host. The life cycle of this parasite involves different intermediate and paratenic hosts. Despite an efficient immune system of the paratenic fish hosts acting against infections with A. crassus, levels of parasitized eels remain high in European river systems. Recently, the round goby Neogobius melanostomus (Gobiidae) has become dominant in many rivers in Europe and is still spreading at a rapid pace. This highly invasive species might potentially act as an important, so far neglected paratenic fish host for A. crassus.
Methods: Based on own observations and earlier single sightings of A. crassus in N. melanostomus, 60 fresh individuals of N. melanostomus were caught in the Rhine River and examined to assess the infection levels with metazoan parasites, especially A. crassus. Glycerin preparations were used for parasite identification.
Results: The parasite most frequently found in N. melanostomus was the acanthocephalan Pomphorhynchus sp. (subadult stage) which occurred mainly encysted in the mesenteries and liver. Every third gobiid (P = 31.7%) was infected by A. crassus larvae (L3) which exclusively occurred inside the acanthocephalan cysts. No intact or degenerated larvae of A. crassus were detected elsewhere in the goby, neither in the body cavity and mesenteries nor in other organs. Affected cysts contained the acanthocephalan larvae and 1-12 (mI =3) living A. crassus larvae. Additionally, encysted larvae of the nematode Raphidascaris acus were detected in the gobies, but only in the body cavity and not inside the acanthocephalan cysts.
Conclusions: Based on our observations, we suggest that A. crassus might actively bypass the immune response of N. melanostomus by invading the cysts of acanthocephalan parasites of the genus Pomphorhynchus using them as "Trojan horses". Providing that eels prey on the highly abundant round goby and that the latter transfers viable infective larvae of A. crassus, the new paratenic host might have a strong impact on the epidemiology of A. crassus.
Mapping is an important tool for the management of plant invasions. If landscapes are mapped in an appropriate way, results can help managers decide when and where to prioritize their efforts. We mapped vegetation with the aim of providing key information for managers on the extent, density and rates of spread of multiple invasive species across the landscape. Our case study focused on an area of Galapagos National Park that is faced with the challenge of managing multiple plant invasions. We used satellite imagery to produce a spatially explicit database of plant species densities in the canopy, finding that 92% of the humid highlands had some degree of invasion and 41% of the canopy was comprised of invasive plants. We also calculated the rate of spread of eight invasive species using known introduction dates, finding that species with the most limited dispersal ability had the slowest spread rates while those able to disperse long distances had a range of spread rates. Our results on spread rate fall at the lower end of the range of published spread rates of invasive plants. This is probably because most studies are based on the entire geographic extent, whereas our estimates took plant density into account. A spatial database of plant species densities, such as the one developed in our case study, can be used by managers to decide where to apply management actions and thereby help curtail the spread of current plant invasions. For example, it can be used to identify sites containing several invasive plant species, to find the density of a particular species across the landscape or to locate where native species make up the majority of the canopy. Similar databases could be developed elsewhere to help inform the management of multiple plant invasions over the landscape.
Zur Flora von Deutschland gehören sieben Arten der Wintergrüngewächse, die alle auch in Sachsen-Anhalt heimisch sind: Dolden-Winterlieb (Chimaphila umbellata [L.] BARTON), Einblütiges Wintergrün (Moneses uniflora [L.] A. GRAY), Birngrün (Orthilia secunda [L.] HOUSE), Grünblütiges Wintergrün (Pyrola chlorantha SW.), Mittleres Wintergrün (Pyrola media SW.), Kleines Wintergrün (Pyrola minor L.) und Rundblättriges Wintergrün (Pyrola rotundifolia L.). Im Mittelpunkt dieses Beitrages steht nur die aktuelle Verbreitung im Bundesland mit Bezug auf MTB-Q4, und zwar bezogen auf zwei Perioden von jeweils 10 Jahren: Nachweise im MTB-Q4 von 2005 bis 2014, sowie Nachweise im MTB-Q4 von 1995 bis 2004.
Die Mauerkronen der Nicolai-Kirche in Zerbst wurden im Jahr 2001 mit unterschiedlichen Methoden begrünt. Das Ziel dieser Maßnahmen war die Pufferung extremer Temperaturunterschiede, die häufig zu starken Schäden am Mauerwerk führen. In Vorbereitung von anstehenden Sanierungsmaßnahmen wurde der Artenbestand auf repräsentativen Abschnitten der Mauern erfasst. Auf diese Weise konnte ermittelt werden, welche Arten mit den extremen Standortbedingungen, wie Hitze, Trockenheit und große Temperaturunterschiede gut zurechtkommen und daher bei der Sanierung an Fehlstellen erfolgversprechend angesiedelt werden können.
Das Vorkommen von Bunias orientalis (Orientalische Zackenschote) konzentriert sich auf den Südwesten Sachsen-Anhalts. Bisher ist die Art vorrangig aus dem Straßenbegleitgrün bekannt, doch zunehmend kann das Einwandern in Halbtrockenrasen und Frischwiesen beobachtet werden. Ein Beispiel dafür ist die 2011 eingerichtete und ca. 24 ha große Ganzjahresstandweide bei Hainrode. 2013 konnten hier 58 Fundpunkte mit 644 Sprossen dokumentiert werden. Die Art wird von den weidenden Salers angenommen und verbissen. Das Abfressen führt zu geringeren Wuchshöhen und vermutlich ist die Reproduktion über Samen auch bei Neuaustrieb deutlich herabgesetzt. Es wird die Möglichkeit, mittels Beweidung der Südharzer Frischwiesen die weitere Ausbreitung von Bunias orientalis zu verhindern bzw. die Art über eine Beweidung zurückzudrängen, diskutiert.
Structure and regulatory interactions of the cytoplasmic terminal domains of serotonin transporter
(2014)
Uptake of neurotransmitters by sodium-coupled monoamine transporters of the NSS family is required for termination of synaptic transmission. Transport is tightly regulated by protein–protein interactions involving the small cytoplasmic segments at the amino- and carboxy-terminal ends of the transporter. Although structures of homologues provide information about the transmembrane regions of these transporters, the structural arrangement of the terminal domains remains largely unknown. Here, we combined molecular modeling, biochemical, and biophysical approaches in an iterative manner to investigate the structure of the 82-residue N-terminal and 30-residue C-terminal domains of human serotonin transporter (SERT). Several secondary structures were predicted in these domains, and structural models were built using the Rosetta fragment-based methodology. One-dimensional 1H nuclear magnetic resonance and circular dichroism spectroscopy supported the presence of helical elements in the isolated SERT N-terminal domain. Moreover, introducing helix-breaking residues within those elements altered the fluorescence resonance energy transfer signal between terminal cyan fluorescent protein and yellow fluorescent protein tags attached to full-length SERT, consistent with the notion that the fold of the terminal domains is relatively well-defined. Full-length models of SERT that are consistent with these and published experimental data were generated. The resultant models predict confined loci for the terminal domains and predict that they move apart during the transport-related conformational cycle, as predicted by structures of homologues and by the “rocking bundle” hypothesis, which is consistent with spectroscopic measurements. The models also suggest the nature of binding to regulatory interaction partners. This study provides a structural context for functional and regulatory mechanisms involving SERT terminal domains.
Observation and tracking of fluorescently labeled molecules and particles in living cells reveals detailed information about intracellular processes on the molecular level. Whereas light microscopic particle observation is usually limited to two-dimensional projections of short trajectory segments, we report here image-based real-time three-dimensional single particle tracking in an active feedback loop with single molecule sensitivity. We tracked particles carrying only 1-3 fluorophores deep inside living tissue with high spatio-temporal resolution. Using this approach, we succeeded to acquire trajectories containing several hundred localizations. We present statistical methods to find significant deviations from random Brownian motion in such trajectories. The analysis allowed us to directly observe transitions in the mobility of ribosomal (r)RNA and Balbiani ring (BR) messenger (m)RNA particles in living Chironomus tentans salivary gland cell nuclei. We found that BR mRNA particles displayed phases of reduced mobility, while rRNA particles showed distinct binding events in and near nucleoli.
The knowledge of phenotypic variation in the European range of the highly allergenic Ambrosia artemisiifolia L. (common ragweed) is not entirely complete, even though it is an invasive species of utmost concern. We hypothesized the prevalence of phenotypic differentiations between common ragweed populations in the introduced range, and we assumed that those differentiations were related to environmental conditions at the points of origin. Using a common garden experiment, we investigated biomass allocation, growth rates, and flowering phenology of 38 European common ragweed populations originating from a major geographical gradient. We observed considerable phenotypic variation in growth parameters and flowering phenology, e.g. mean aboveground biomass varied from 23.3 to 47.3 g between the populations. We were able to relate most measured traits with environmental parameters prevailing at the points of origin. For example, early growth of ruderal populations was highly correlated with temperature and precipitation at the point of origin. Late growth and flowering phenology were highly correlated with latitude, i.e. individuals from northern populations grew smaller and flowered and dispersed their pollen and seeds up to 5 weeks earlier than individuals from southern populations. We also found a longitudinal gradient in flowering phenology which has not yet been described. The existence of such a high variability in the introduced range may facilitate further range expansion. We suggest that the correlation with environmental variables rests upon genetic variation possibly due to adaptations to the respective environment. To clarify if such adaptation results from multiple events of introduction or as evolutionary response after introduction, genetic investigations are needed.
We have isolated a cDNA coding for a putative invertebrate-type dopamine receptor (Peadop2) from P. americana brain by using a PCR-based strategy. The mRNA is present in samples from brain and salivary glands. We analyzed the distribution of the PeaDOP2 receptor protein with specific affinity-purified polyclonal antibodies. On Western blots, PeaDOP2 was detected in protein samples from brain, subesophageal ganglion, thoracic ganglia, and salivary glands. In immunocytochemical experiments, we detected PeaDOP2 in neurons with their somata being located at the anterior edge of the medulla bilaterally innervating the optic lobes and projecting to the ventro-lateral protocerebrum. In order to determine the functional and pharmacological properties of the cloned receptor, we generated a cell line constitutively expressing PeaDOP2. Activation of PeaDOP2-expressing cells with dopamine induced an increase in intracellular cAMP. In contrast, a C-terminally truncated splice variant of this receptor did not exhibit any functional property by itself. The molecular and pharmacological characterization of the first dopamine receptor from P. americana provides the basis for forthcoming studies focusing on the significance of the dopaminergic system in cockroach behavior and physiology.
Many diseases have been described to be associated with inflammatory processes. The currently available anti-inflammatory drug therapy is often not successful or causes intolerable side effects. Thus, new anti-inflammatory substances are still urgently needed. Plants were the first source of remedies in the history of mankind. Since their chemical characterization in the 19th century, herbal bioactive compounds have fueled drug development. Also, nowadays, new plant-derived agents continuously enrich our drug arsenal (e.g., vincristine, galantamine, and artemisinin). The number of new, pharmacologically active herbal ingredients, in particular that of anti-inflammatory compounds, rises continuously. The major obstacle in this field is the translation of preclinical knowledge into evidence-based clinical progress. Human trials of good quality are often missing or, when available, are frequently not suitable to really prove a therapeutical value. This minireview will summarize the current situation of 6 very prominent plant-derived anti-inflammatory compounds: curcumin, colchicine, resveratrol, capsaicin, epigallocatechin-3-gallate (EGCG), and quercetin. We will highlight their clinical potential and/or pinpoint an overestimation. Moreover, we will sum up the planned trials in order to provide insights into the inflammatory disorders that are hypothesized to be beneficially influenced by the compound.
Bacteria communicate via small diffusible molecules to mediate group-coordinated behavior, a process designated as quorum sensing. The basic molecular quorum sensing system of Gram-negative bacteria consists of a LuxI-type autoinducer synthase producing acyl-homoserine lactones (AHLs) as signaling molecules, and a LuxR-type receptor detecting the AHLs to control expression of specific genes. However, many proteobacteria possess one or more unpaired LuxR-type receptors that lack a cognate LuxI-like synthase, referred to as LuxR solos. The enteric and insect pathogenic bacteria of the genus Photorhabdus harbor an extraordinarily high number of LuxR solos, more than any other known bacteria, and all lack a LuxI-like synthase. Here, we focus on the presence and the different types of LuxR solos in the three known Photorhabdus species using bioinformatics analyses. Generally, the N-terminal signal-binding domain (SBD) of LuxR-type receptors sensing AHLs have a motif of six conserved amino acids that is important for binding and specificity of the signaling molecule. However, this motif is altered in the majority of the Photorhabdus-specific LuxR solos, suggesting the use of other signaling molecules than AHLs. Furthermore, all Photorhabdus species contain at least one LuxR solo with an intact AHL-binding motif, which might allow the ability to sense AHLs of other bacteria. Moreover, all three species have high AHL-degrading activity caused by the presence of different AHL-lactonases and AHL-acylases, revealing a high quorum quenching activity against other bacteria. However, the majority of the other LuxR solos in Photorhabdus have a N-terminal so-called PAS4-domain instead of an AHL-binding domain, containing different amino acid motifs than the AHL-sensors, which potentially allows the recognition of a highly variable range of signaling molecules that can be sensed apart from AHLs. These PAS4-LuxR solos are proposed to be involved in host sensing, and therefore in inter-kingdom signaling. Overall, Photorhabdus species are perfect model organisms to study bacterial communication via LuxR solos and their role for a symbiotic and pathogenic life style.
Ongoing and predicted global change makes understanding and predicting species’ range shifts an urgent scientific priority. Here, we provide a synthetic perspective on the so far poorly understood effects of interspecific interactions on range expansion rates. We present theoretical foundations for how interspecific interactions may modulate range expansion rates, consider examples from empirical studies of biological invasions and natural range expansions as well as process-based simulations, and discuss how interspecific interactions can be more broadly represented in process-based, spatiotemporally explicit range forecasts. Theory tells us that interspecific interactions affect expansion rates via alteration of local population growth rates and spatial displacement rates, but also via effects on other demographic parameters. The best empirical evidence for interspecific effects on expansion rates comes from studies of biological invasions. Notably, invasion studies indicate that competitive dominance and release from specialized enemies can enhance expansion rates. Studies of natural range expansions especially point to the potential for competition from resident species to reduce expansion rates. Overall, it is clear that interspecific interactions may have important consequences for range dynamics, but also that their effects have received too little attention to robustly generalize on their importance. We then discuss how interspecific interactions effects can be more widely incorporated in dynamic modeling of range expansions. Importantly, models must describe spatiotemporal variation in both local population dynamics and dispersal. Finally, we derive the following guidelines for when it is particularly important to explicitly represent interspecific interactions in dynamic range expansion forecasts: if most interacting species show correlated spatial or temporal trends in their effects on the target species, if the number of interacting species is low, and if the abundance of one or more strongly interacting species is not closely linked to the abundance of the target species.
Translation fidelity and efficiency require multiple ribosomal (r)RNA modifications that are mostly mediated by small nucleolar (sno)RNPs during ribosome production. Overlapping basepairing of snoRNAs with pre-rRNAs often necessitates sequential and efficient association and dissociation of the snoRNPs, however, how such hierarchy is established has remained unknown so far. Here, we identify several late-acting snoRNAs that bind pre-40S particles in human cells and show that their association and function in pre-40S complexes is regulated by the RNA helicase DDX21. We map DDX21 crosslinking sites on pre-rRNAs and show their overlap with the basepairing sites of the affected snoRNAs. While DDX21 activity is required for recruitment of the late-acting snoRNAs SNORD56 and SNORD68, earlier snoRNAs are not affected by DDX21 depletion. Together, these observations provide an understanding of the timing and ordered hierarchy of snoRNP action in pre-40S maturation and reveal a novel mode of regulation of snoRNP function by an RNA helicase in human cells.
Arachnides N°73 (2014)
(2014)
Arachnides N°72 (2014)
(2014)
Arachnides N°71 (2014)
(2014)
Arachnides N°70 (2014)
(2014)
One of the most challenging aspects of RT-qPCR data analysis is the identification of reliable reference genes. Ideally, they should be neither induced nor repressed under different experimental conditions. To date, few reference genes have been adequately studied for sugarcane (Saccharum spp.) using statistical approaches. In this work, six candidate genes (αTUB, GAPDH, H1, SAMDC, UBQ, and 25S rRNA) were tested for gene expression normalization of sugarcane root tissues from drought-tolerant and -sensitive accessions after continuous dehydration (24 h). By undergoing different approaches (GeNorm, NormFinder, and BestKeeper), it was shown that most of them could be used in combinations for normalization purposes, with the exception of SAMDC. Nevertheless three of them (H1, αTUB, and GAPDH) were considered the most reliable reference genes. Their suitability as reference genes validated the expression profiles of two targets (AS and PFPα1), related to SuperSAGE unitags, in agreement with results revealed by previous in silico analysis. The other two sugarcane unitags (ACC oxidase and PIP1-1), after salt stress (100 mM NaCl), presented their expressions validated in the same way. In conclusion, these reference genes will be useful for dissecting gene expression in sugarcane roots under abiotic stress, especially in transcriptomic studies using SuperSAGE or RNAseq approaches.
Ursine bears are a mammalian subfamily that comprises six morphologically and ecologically distinct extant species. Previous phylogenetic analyses of concatenated nuclear genes could not resolve all relationships among bears, and appeared to conflict with the mitochondrial phylogeny. Evolutionary processes such as incomplete lineage sorting and introgression can cause gene tree discordance and complicate phylogenetic inferences, but are not accounted for in phylogenetic analyses of concatenated data. We generated a high-resolution data set of autosomal introns from several individuals per species and of Y-chromosomal markers. Incorporating intraspecific variability in coalescence-based phylogenetic and gene flow estimation approaches, we traced the genealogical history of individual alleles. Considerable heterogeneity among nuclear loci and discordance between nuclear and mitochondrial phylogenies were found. A species tree with divergence time estimates indicated that ursine bears diversified within less than 2 My. Consistent with a complex branching order within a clade of Asian bear species, we identified unidirectional gene flow from Asian black into sloth bears. Moreover, gene flow detected from brown into American black bears can explain the conflicting placement of the American black bear in mitochondrial and nuclear phylogenies. These results highlight that both incomplete lineage sorting and introgression are prominent evolutionary forces even on time scales up to several million years. Complex evolutionary patterns are not adequately captured by strictly bifurcating models, and can only be fully understood when analyzing multiple independently inherited loci in a coalescence framework. Phylogenetic incongruence among gene trees hence needs to be recognized as a biologically meaningful signal.
NeoBiota, Volume 23 (2014)
(2014)
Kempfidris : a new genus of myrmicine ants from the Neotropical region (Hymenoptera: Formicidae)
(2014)
The new genus Kempfidris gen. nov. is described based on the workers of a single species, K. inusualis comb. nov., from Brazil, Ecuador, and Venezuela. Kempfidris inusualis comb. nov. was originally described by Fernández (2007) and provisionally placed in Monomorium awaiting a better understanding of the internal relationships in Myrmicinae. Kempfidris gen. nov. has a series of distinctive morphological characters including the mandibular configuration, vestibulate propodeal spiracle, propodeal carinae, and cylindrical micro-pegs on the posteromedian portion of abdominal tergum VI and anteromedian portion of abdominal tergum VII. This last trait appears to be autapomorphic for the genus.
Solaenodolichopus Verhoeff, 1924 is redefined to include S. pruvoti (Brolemann, 1931), S. rubriventris Verhoeff, 1928, S. sulcatus (Verhoeff, 1928), S. teres (Verhoeff, 1924), S. vittatus (Verhoeff, 1924) and S. walesius Verhoeff, 1928, each of which is redescribed. Lectotypes are designated for S. sulcatus, S. teres, S. vittatus and S. walesius. Parwalesoma Verhoeff, 1937 is synonymised with Solaenodolichopus and S. vittatus dorsalis (Verhoeff, 1924) with S. vittatus vittatus (Verhoeff, 1924).
Tapinesthis inermis Simon, 1882, the only species in the genus, is widely distributed in western Europe. This redescription provides the first information on the ultrastructure of the species using SEM. The morphology of the spinnerets, tarsal claws and tarsal organs, and the internal structure of the female genitalia and the male palp are described and illustrated in detail. The combination of these structures is very similar to those encountered in some dysderoid spiders and supports the basal placement of Tapinesthis among Oonopinae. The phylogenetic relationships of the species are discussed. The only female among the three syntypes is designated as the lectotype.
This paper summarizes current knowledge about Central African pholcids. Central Africa is here defined as the area between 10°N and 7°S and between 6°E and 18°E, including mainly the Lower Guinean subregion of the Guineo-Congolian center of endemism. This includes all of Gabon, Equatorial Guinea, São Tomé and Príncipe, most of Cameroon and Congo Republic, and parts of the neighboring countries. An annotated list of the 14 genera and 79 species recorded from this area is given, together with distribution maps and an identification key to genera. Seven species are newly described: Anansus kamwai sp. nov., Leptopholcus gabonicus sp. nov., Ninetis faro sp. nov., Pholcus punu sp. nov., P. rawiriae sp. nov., Spermophora abibae sp. nov., and S. awalai sp. nov. Additional new records are given for 16 previously described species, including 17 new country records. Distribution and diversity patterns are compared with data on West and East Africa. While West Africa contains a similar set of genera it is significantly less diverse than Central Africa. East Africa is taxonomically more distinct. It has similar levels of diversity as Central Africa, but appears to be less undersampled.
Among the 125 currently recognized species of the panoceanic genus Leucothoe, L. antarctica was described in 1888 from the Antarctic seas, but was soon synonymized with the so-called cosmopolitan Leucothoe spinicarpa Abildgaard, which was cited from the Southern Ocean about 70 times since this first record. After erecting a new Antarctic species again only in 1983, “morphological variants” were observed and discussed. In this paper, we revalidate the first defined Antarctic species (Leucothoe antarctica), redescribe the second one (L. orkneyi), describe 5 new Southern Ocean species (L. campbelli sp. nov., L. longimembris sp. nov., L. macquariae sp. nov., L. merletta sp. nov. and L. weddellensis sp. nov.) and provide a key to all Antarctic and sub-Antarctic species.
Es wird die Entwicklung der Brockenvegetation von 1993 bis 2013 aufgezeigt. Von besonderem Interesse ist dabei die Vegetationsentwicklung auf ehemals versiegelten und später renaturierten Flächen. Aber auch den acidiphilen Zwergstrauchheiden galt ein besonderes Augenmerk, da diese bevorzugte Standorte für die Brockenanemone (Pulsatilla alpina ssp. alba) sind.
Über die seit dem Altertum übliche Verwendung der Knollen von Orchis morio und verwandter Arten (Salep) wird aus kulturhistorischer Sicht berichtet. Dabei wird auf die Gewinnung von Salep und seine Bedeutung als Aphrodisiakum, als pharmazeutische Droge und technisches Hilfsmittel eingegangen. Es folgen Ausführungen zur Bestandssituation von Orchis morio im Altmarkreis Salzwedel.
Bei herbstlichen Temperaturen machten wir uns auf ins Weitmarer Holz zur jährlichen Pilzexkursion, geleitet vom Arbeitskreis Pilzkunde Ruhr (APR). Das Gebiet gilt nicht nur als größtes zusammenhängendes Waldgebiet in Bochum, sondern lockt am frühen Sonntagmorgen offensichtlich auch sämtliche Bochumer Sportler aus den Betten, die das im weniger sportlichen Tempo voranschreitende Exkursionsgrüppchen kritisch beäugten. Neben vielen häufigen Pilzarten, die der Pilzanfänger bereits aus Exkursionen der letzten Jahre kannte und sich dankbar wieder ins Gedächtnis rief, konnte auch die eine oder andere Besonderheit wie der Bittere Schleimkopf (Cortinarius infractus) gefunden werden – ein Neufund für die Region. Die Artenliste ist auf der Homepage des Arbeitskreises Pilzkunde Ruhr (www.pilzkunde-ruhr.de) einzusehen.
"Paccan – Nuss, die mit einem Stein geknackt werden muss", so nannten die Algonkin- Indianer Nordamerikas die Nüsse der Hickory-Bäume, zu denen auch der Pekannussbaum (Carya illinoinensis, oft fälschlich Carya illinoensis geschrieben) gehört. Er ist verwandt mit der Echten Walnuss (Juglans regia). "Carya" leitet sich ab vom griechischen Wort "karyon" und bedeutet Nüsse oder Kerne. Als "Illinois nuts" brachten Pelzhändler die Nüsse an die Atlantikküste und so kamen sie zu ihrem botanischen Namen "illinoinensis", obwohl sie nicht aus Illinois stammten. Pekannüsse sind bei uns regelmäßige Bestandteile des Nusssortiments und werden besonders zur Weihnachtszeit überall angeboten. Lebende Pflanzen gibt es bei uns dagegen nur selten (z. B. in den Botanischen Gärten Bochum, Bonn und Düsseldorf).
Um auf die Problematik der Veränderung von Lebensräumen und ihre Zerstörung aufmerksam zu machen, wird jährlich von den deutschen Arbeitskreisen Heimische Orchideen (AHO) eine "Orchidee des Jahres" gewählt. Für das Jahr 2013 wurde das Purpur-Knabenkraut (Orchis purpurea) ausgewählt. Es steht insbesondere für die Gefährdung von Halbtrockenrasen.
Bei Schnee, Frost um -5 C° und eisigem Ostwind scharrte sich die für diese Verhältnisse bemerkenswert große Exkursionsgruppe um winterliche Bäume und Mauern und grub Moose aus dem Schnee. Diesmal wurde der Bereich der I-Nordstraße von IB-Gebäude bis zum Park zwischen ID und ND aufgesucht. Und der Einsatz wurde belohnt: Die Artenliste der Ruhr-Uni, die durch die Exkursionen der vergangenen Jahre bereits beachtliche Ausmaße annimmt, konnte noch um einige Arten erweitert werden.
Exkursion: Hattingen-Niederbonsfeld, geologisch-geomorphologische Exkursion im Ruhrtal am Isenberg
(2014)
Am steilen Prallhang der Ruhr zwischen Hattingen und Niederwenigern ist die vermutlich längste zusammenhängende Gesteinsfolge des Ruhrgebiets aufgeschlossen, deren südlicher Abschnitt im Rahmen der Exkursion näher betrachtet wurde. Im Mittelpunkt standen die besonders deutlich ausgeprägten Zusammenhänge zwischen der inneren geologischen Struktur des Steinkohlengebirges und dem heutigen Oberflächenrelief mit seinen markanten Bergrücken (Eggen). Die Eggen sind südlich des Ruhrtals zwischen Kettwig und Witten derart bestimmend für das Landschaftsbild, dass die entsprechenden Gebiete im Rahmen der naturräumlichen Gliederung des Ruhrgebiets durch VON KÜRTEN (1970) als Ruhr- Eggenland und Märkisches Eggenland bezeichnet werden.
Stechpalme, Efeu und Misteln gehören zu den heimischen Pflanzen, die in unseren Weihnachtsbräuchen eine wichtige Rolle spielen. Als immergrüne Arten haftet ihnen eine umfassende Symbolik an und sie beleben damit die dunkle Jahreszeit. Der Mistel kommt dabei eine besondere Bedeutung zu, die auf ihrer ungewöhnlichen Lebensweise basiert.
Eine der letzten relativ nährstoffarmen und daher artenreichen Wiesen in Bochum liegt auf dem Kalwes südlich der Fachhochschule Bochum. Sie wird allerdings zunehmend von Norden her aufgebraucht und als Bauland verwendet. Es lohnt sich daher immer wieder, diese Wiese aufzusuchen, solange sie noch existiert.
Aus dem Studentenfutter ist die leckere Cashewnuss nicht wegzudenken und manchmal findet sie sich auch auf dem Weihnachtsteller oder im Weihnachtsgebäck. Weniger bekannt sind jedoch die vielfältigen Nutzungsmöglichkeiten, die sich hinter dem exotischen Cashewbaum (auch Kaschubaum, Acajubaum oder Nierenpflanze) verbergen. Und auch eine Cashewblüte oder den sog. Cashewapfel (Kaschuapfel) bekommt man bei uns kaum einmal zu sehen, denn die Art ist hier nur in Botanischen Gärten zu finden und dort fruchtet sie nur selten.
Der Weihnachtsstern ist im mexikanischen Hochland beheimatet und wächst dort als Strauch von 4 bis 6 m Höhe. J. R. POINSETTE, seinerzeit Botschafter der USA in Mexiko, schickte 1835 Pflanzen nach Hause und begründete damit eine gärtnerische Erfolgsstory. Der Name "Poinsettia" hat sich für den Weihnachtsstern bis heute vor allem im englischen Sprachraum gehalten. Zuerst wurden die Pflanzen überwiegend als Schnittblumen kultiviert.
Der Freeden im Teutoburger Wald ist ein mit Kalk-Buchenwäldern bestandener Bergkamm. Geologisch betrachtet handelt es sich um Kalkgesteine der Oberkreide, die hier am Rand des Münsterländer Kreidebeckens aufgebogen und steil gestellt sind. Von herausragender Bedeutung ist das Naturschutzgebiet aufgrund der Vielzahl von Frühjahrsblühern.
The ground beetle genus Cymindis is the most species rich amongst genera in the carabid subtribe Cymindidina (tribe Lebiini). Four subgenera are often recognized, i.e. Cymindis (sensu stricto) Latreille, Afrotarus Jeannel, Taridius Chaudoir and Pinacodera Schaum. Cymindis (sensu stricto) has a predominately Holarctic distribution (Hunting 2013) and includes Cymindis alutacea Wollaston, C. dohrnii Wollaston and C. anchomenoides Wollaston (the last one sometimes placed in Tarulus Bedel, either ranked as a genus or a subgenus), all three endemic to the Cape Verde Islands (Geisthardt 1988, 1996).
The abundance of humpback whales occurring around Boa Vista, Cape Verde Islands, was estimated by markrecapture modelling. Photographs of markings on tail flukes of individual whales were collected during the breeding season. Sighting histories were constructed for each individual and an abundance of 171 animals was estimated using a Jolly-Seber mark-recapture model. Correcting for known biases arising due to sex-specific behaviour and temporary emigration insofar as possible, an estimate of 260 whales was obtained. This is significantly higher than the previous estimate of 99 humpback whales from this region. Due to limited survey effort it is not known how representative the study area is of the entire Cape Verde archipelago and this estimate may be considered to be biased low and serves as a minimum estimate. The high recapture probability (0.37) coupled with the low abundance is consistent with a small local population. The low survival rate (0.86) suggests possible emigration and further studies are needed to assess connectivity between humpback whales breeding in Cape Verde and other breeding locations. The amount of exchange between groups of whales breeding in Cape Verde and adjacent areas remains unknown. It is unclear whether the abundance estimate herein applies to part of an isolated population or part of a larger and continuous one.
Black-winged stilt Himantopus himantopus (Linnaeus, 1758) has a wide geographical distribution, including France and southern Iberia to sub-Saharan Africa and Madagascar, and east to central Asia and northern central China, India, Sri Lanka, Indochina and Taiwan (Pierce 1996). On the African mainland, breeding sites nearest to the Cape Verde Islands are in Mauritania and Senegal (Isenmann et al. 2010, Borrow & Demey 2014).
Recent data on status and distribution of resident and migrant birds in the Cape Verde Islands are presented, including records of nine taxa new to the archipelago, viz. Ciconia nigra, Ciconia ciconia, Circus macrourus, Falco naumanni, Chlidonias hybrida, Chlidonias leucopterus, Apus affinis, Ptyonoprogne fuligula and Phylloscopus inornatus. Also presented are data on a number of breeding taxa, including the first record of the endemic Cape Verde purple heron Ardea bournei outside Santiago island. The alarming situation of the magnificent frigatebird Fregata magnificens, of which only three individuals remain in Cape Verde, constituting the entire population in the East Atlantic, remains of great concern. Several species of birds of prey are also highly threatened and have already become extinct in some islands. Following its expansion through Northwest Africa and the Canary Islands, Eurasian collared dove Streptopelia decaocto has now also become established in at least three of the Cape Verde Islands.
The zoogeographic composition of the coastal ichthyofauna of the Cape Verde archipelago shows a predominance of Guinean species, followed by tropical-subtropical (amphi-Atlantic) fishes and several endemic species. Recent taxonomic revisions, new species descriptions, new fish records in the area and recent ecological surveys of intra-specific fish interaction as well as emergent research on seamounts in national waters warrant an up-to-date review of research on the ichthyofauna of Cape Verde. An updated percentage of endemic coastal reef fish of 10.2% attest significant speciation in Cape Verde waters. Almost half of the total cryptobenthic fish species richness in Cape Verde comprises endemic species, some of them newly discovered. Examples of endemism are discussed, notably white seabream Diplodus sargus lineatus, bulldog dentex Dentex (Virididentex) acromegalus, blackfish drummer Girella stuebeli, Lubbock's chromis Chromis lubbocki, Cape Verde damselfish Similiparma hermani and Guinean parrotfish Scarus hoefleri. Cape Verde diverges considerably from the other Macaronesian island groups in terms of its ichthyofauna and its uniqueness warrants special attention by governmental agencies and conservation organizations.
During an entomological survey in Santiago Island, Cape Verde Islands, in November-December 2011 in order to study the bio-ecology and susceptibility to insecticides of Anopheles arabiensis Patton, 1905, Culex tritaeniorhynchus Giles, 1901 was found to be present in the Santa Cruz District. Both adult and immature specimens were collected and a description of both is given. Further confirmation of the taxonomic identity of the specimens was obtained from studying the male genitalia. This is the first known occurrence of Culex tritaeniorhynchus (a primary vector of Japanese encephalitis in eastern and southern Asia and a potential vector of West Nile Virus, Sindbis and Rift Valley Fever Virus) in the Cape Verde Islands.
The genus Paragymnopleurus Shipp, 1897 (Coleoptera: Scarabaeidae: Scarabaeinae: Gymnopleurini) is characterized and its constituent taxa are keyed and illustrated. Twelve species and five subspecies are deemed valid, and five species groups are recognized. Three new synonymies include: Paragymnopleurus stipes japonicus Balthasar is synonymized with P. ambiguus Janssens, and P. maurus malayanus Ochi and Kon and P. maurus pauliani Janssens are synonymized with the nominotypical subspecies. First country and provincial records are reported for P. brahminus (Waterhouse), P. maurus (Sharp) and P. sinuatus szechouanicus Balthasar. A lectotype is here designated for Gymnopleurus singularis Waterhouse, validating an unpublished designation. A checklist of valid species and synonyms is provided.
A summary of the milliped faunas of Pakistan, Bangladesh, and Kashmir (Arthropoda: Diplopoda)
(2014)
Three female callipodidan samples from northern Pakistan are assigned to Bollmania kohalana (Attems, 1936) (Caspiopetalidae), the only ordinal representative documented from the country; a new record of Kaschmiriosoma loebli Jeekel, 2003 (Polydesmida: Paradoxosomatidae), is also provided. Localities are summarized for the 14 Pakistani, 6 Kashmirian, and 5 Bangladeshi diplopods. The last include one unidentifi able female of Zephronia Gray, 1832 (Sphaerotheriida: Zephroniidae), and two adventive species, Trachyjulus calvus (Pocock, 1893) (Spirostreptida: Cambalopsidae) and Asiomorpha coarctata (Saussure, 1860) (Polydesmida: Paradoxosomatidae); all constitute new country records. Two obscurely documented Bangladeshi diplopods are Gonoplectus cautus (Attems, 1936) (Spirostreptida: Harpagophoridae), and Trichopeltis watsoni Pocock, 1895 (Polydesmida: Cryptodesmidae). The Pakistani polydesmidan, Quasidesmus puschtun Golovatch, 1991, is transferred from Pyrgodesmidae to Cryptodesmidae.
Carinostoma elegans new to the Slovakian harvestmen fauna (Opiliones, Dyspnoi, Nemastomatidae)
(2014)
A new genus and species of small harvestman was found for the first time in Slovakia – Carinostoma elegans (Sorensen, 1894). One male and two females were collected in the Mlyňany arboretum of the Slovak Academy of Science (western Slovakia). Descriptions and photographs of both sexes of C. elegans are provided. Additional comments, and a map of distribution of all species of this genus, are provided.
For faunistic research on a certain animal group, knowledge of the situation in surrounding countries is a necessity. The presence of certain species in neighbouring regions, together with notes on their distribution and trends, offers valuable information for the interpretation of the status of these species in one’s own study area. Changes in the national fauna – e.g. the discovery of a new species – can often better be explained when integrating information on the status of species in nearby countries. Distribution atlases are therefore not only valuable publications for the country of concern, but also for other countries in the same region.
Sauron rayi (Simon, 1881) is recorded in Austria for the first time. Male and female specimens of this rare European spider were found in two “Austrian pine forests” in Lower Austria. Data on distribution, habitat, phenology and Red List status from the Austrian localities and from published records in other countries are presented.
Jörg Wunderlich wurde am 19. Dezember 1939 in Berlin geboren. Nach dem zweiten Weltkrieg befand sich seine Familie im Osten des Landes, es gelang ihr aber 1951 nach West-Berlin zu ziehen. Aufgrund der mangelnden schulischen Ausbildung in der Nachkriegszeit und der unterschiedlichen Schulprogramme im Osten (Russisch) und Westen (Latein und Englisch) schloss Jörg die Schule im Alter von 20 Jahren ab.
Danach begann er an der Freien Universität Berlin zunächst Mathematik zu studieren, wechselte aber bald zu Biologie, Geographie, Politikwissenschaften und Philosophie. Insgesamt verbrachte er acht Jahre an der Universität. Währenddessen übernahm er Jobs um sich seinen Lebensunterhalt zu finanzieren. Seine Staatsexamensarbeit an der Freien Universität war eine ökologische Studie über die Zwergspinnenfauna der Pfaueninsel in Berlin, einem Naturschutzgebiet, in dem er über 300 Webspinnenarten in verschiedenen Habitaten nachwies, zwei davon neu für die Wissenschaft (Glyphesis taoplesius, Moebelia berolinensis).
Die Springspinne Evarcha michailovi Logunov, 1992 wird erstmalig für Deutschland von einem ehemaligen Truppenübungsplatz im Süden Mecklenburg-Vorpommerns gemeldet. Gleichzeitig werden Erstnachweise der Springspinnen Evarcha laetabunda (C. L. Koch, 1846), Philaeus chrysops (Poda, 1761) und Sitticus inexpectus Logunov & Kronestedt, 1997, der Haubennetzspinne Crustulina sticta (O. P.-Cambridge, 1861) sowie der Krabbenspinne Heriaeus graminicola (Doleschall, 1852) erbracht.
Examination of the type material of the forgotten species Liocranum ochraceum Simon, 1867 reveals this species has to be transferred to the genus Anagraphis comb. nov. and that Anagraphis pallida (Hadjissarantos, 1940) is its junior synonym (syn. nov.). Furthermore, the monotypic genus Macedoniella Drensky, 1935 is a junior synonym of Anagraphis and M. karamani a junior synonym of Anagraphis ochraceum (L. Koch, 1867) (syn. nov.).
A survey of spiders of the genus Scytodes Latreille, 1804 in Iran resulted in six species occurring in this country: Scytodes fusca Walckenaer, 1837, S. strandi Spassky, 1941, S. thoracica (Latreille, 1802), S. univittata Simon, 1882 and – recorded for the first time – S. arwa Rheims, Brescovit & van Harten, 2006 and S. makeda Rheims, Brescovit & van Harten, 2006. Illustrations of the newly recorded species and a key to all known Iranian species are presented.
Carniella brignolii Thaler & Steinberger, 1988 was first described based on a male from Austria and still belongs to the rare, scarcely studied species. Based on material from Germany and Switzerland the hitherto unknown female now can be assigned and presented. In this context a new synonymy is also proposed: The cave-dwelling, troglomorphic C. mihaili (Georgescu, 1989) from Romania, originally established as new genus Marianana, is synonymised with C. brignolii.
Schreibt man etwas über einen bedeutenden Forscher, so stehen im allgemeinen seine wissenschaftlichen Verdienste im Mittelpunkt; lange Publikationslisten, besondere Beiträge, die zu einem bedeutenden Fortschritt im entsprechenden Wissensgebiet geführt haben, werden „abgearbeitet“. Wer den wissenschaftlichen Verdienst von Joachim Haupt (* 13. Januar 1942, † 30. April 2013) bemessen will, der schaue nur in so bedeutende Bücher wie „den Foelix“ (Biologie der Spinnen), die „Neurobiology of arachnids“ oder die „Ecophysiology of spiders“ (Foelix 1992, Barth 1985, Nentwig 1987) – in allen ist Joachim Haupt zitiert, im Überblickswerk über unsere – und seine! – Lieblingstiere ebenso wie in den Spezialwerken.
The spitting spider Scytodes fusca Walckenaer, 1837 is recorded for the first time in Central Europe from both Germany and Slovakia. The species was found in two localities, within the Botanical Garden in Bratislava (Slovakia), specifically from a heated greenhouse with high humidity, and the "Tropical Islands", a tropical holiday resort in Krausnick (Germany). It seems that this Pantropical species has probably been introduced here along with imported plants. A description of diagnostic characters, as well as figures, is given.
Die europäische Spinne des Jahres 2014, Linyphia triangularis (Clerck, 1757), wird vorgestellt. Erstmals ist es eine Linyphiide, eine Baldachinspinne. Ihre Merkmale und Eigenschaften (z.B. Ökologie, Lebensraum, Netz, Phänologie) werden kurz beschrieben. Der Wahlmodus, die beteiligten Länder und zahlreiche Links zu den unterstützenden Gesellschaften und Verbreitungskarten werden genannt.
An annotated catalogue of the rare mesothele spiders (Araneae: Mesothelae: Liphistiidae) held in the Museum für Naturkunde Berlin is presented. The museum hosts non-type specimens of nine species representing all three currently recognised genera, namely: Liphistius desultor Schiödte, 1849, L. malayanus cameroni Haupt, 1983, L. cf. thaleban Schwendinger, 1990, Heptathela kikuyai Ono, 1998, H. kimurai (Kishida, 1920), H. yanbaruensis Haupt, 1983, Ryuthela ishigakiensis Haupt, 1983, R. nishihirai (Haupt, 1979) and R. tanikawai Ono, 1997 (spec. reval.). The geographical focus of this collection is Malaysia and Japan, and most of the material was collected by the Berlin-based zoologist Joachim Haupt.
Silometopus ambiguus (O. Pickard-Cambridge, 1905) is a species occurring in coastal habitats from northeastern to western Europe. S. curtus (Simon, 1881), occurring in southern France and north-eastern Spain, was for a long time mixed up with S. ambiguus, even though corrections have been published very early and several times. This contribution summarizes publications on this topic, discusses doubtful records of both species and proposes corrections for the World Spider Catalog; and thus tries to avoid repetitions of the mistake in the future.
The African species Cheiracanthium furculatum Karsch, 1879 was recognised as being introduced to Germany and is re-described and illustrated in the present study. C. tenuipes Roewer, 1961 is recognised as a junior synonym of C. africanum Lessert, 1921 (new synonymy); both subspecies of C. strasseni Strand, 1915, namely C. strasseni strasseni Strand, 1915 and C. strasseni aharonii Strand, 1915, are recognised as junior synonyms of C. mildei L. Koch, 1864 (new synonymies). Photographic images of the copulatory organs of the types of C. cretense Roewer, 1928, recently synonymised with C. mildei, are provided and discussed in the course of intraspecific variation in C. mildei. The female holotype of C. rehobothense Strand, 1915 is re-described and illustrated. Relations of C. rehobothense to other Cheiracanthium species are discussed.
Au Burkina Faso les études menées sur la végétation des inselbergs sont fragmentaires et insuffisantes. Il existe très peu de données sur la végétation des inselbergs et aucune étude n'a encore été menée sur cette végétation suivant un gradient climatique. L'objectif de cette étude est de décrire la végétation ligneuse des inselbergs des quatre secteurs phytogéographiques du Burkina Faso suivant un gradient climatique nord-sud. Les données ont été collectées dans des placeaux de 30 m x 30 m, suivant un échantillonnage stratifié et aléatoire. Des indices de diversité, d'équitabilité, de valeur d'importance et de similitude ont été calculés pour la végétation des inselbergs granitiques et gréseux des secteurs phytogéographiques. Un total de 188 relevés a été réalisé. 143 espèces ligneuses ont été recensées et se répartissent inégalement dans les quatre secteurs phytogéographiques. Plus de trois quarts moitié (79%) de ces espèces se retrouve dans le secteur Sud-soudanien, ce qui le rend plus riche floristiquement. Le secteur le moins riche en espèces est le secteur Nord-sahélien avec 37 espèces (26%). La richesse floristique augmente du nord au sud du gradient climatique et met en évidence la variation taxonomique suivant le gradient latitudinal de précipitation. Les 143 espèces ligneuses recensées sur les inselbergs des quatre secteurs phytogéographiques représentent 65 % des espèces ligneuses et 7 % de la flore totale du Burkina Faso. Les facteurs topographie et nature du substrat n'ont pas un effet significatif (p > 0,05) sur la composition floristique des inselbergs. La densité et la surface terrière des peuplements ligneux varient significativement suivant l'altitude (p < 0,05). Le climat, particulièrement le niveau de précipitation, reste le principal facteur qui influe sur la répartition des taxa devant la nature du substrat, la topographie et l’anthropisation. Les peuplements ligneux des inselbergs des secteurs sud-sahélien et ord-soudanien sont les moins denses. Ils subissent plus de pression anthropique par rapport aux peuplements ligneux des secteurs Nord-sahélien et Sud-soudanien. Les inselbergs les plus hauts ont une végétation ligneuse plus dense que les inselbergs les plus bas.
Desertification is a major problem in Sudano-sahelian West Africa, including the loss of biodiversity and vegetation cover. The loss of related ecosystem services is having a severe impact on human wellbeing. To facilitate assessments of these aspects of desertification, we decided to find plant species suitable as indicators. Based on a large database of vegetation plot data for Burkina Faso, we identified species associated with high or low levels of species richness and vegetation cover by calculating average values of these measures from vegetation plots on which they occur. To account for the differences between the dry Sahel and the more humid Sudan, we separated the plots of our study area in three vegetation zones (Sahel, North Sudan, South Sudan). Furthermore, herbs and woody plants were analysed separately, as they were usually represented in different plot sizes in the primary data. For each combination of species richness or vegetation cover, vegetation zone and growth form we identified ten species indicating low and another ten species indicating high values and assigned indicator values based on the average values of these species in the relevés.
Knowledge about useful plants and their various applications in West Africa is scattered over many publications and often in form of grey literature difficult to access. Several online-databases compile large scale information from these sources and provide comprehensive summarized descriptions of plant usages. Our aim is to additionally build up a database (UseDa) for primary ethnobotanical interview data. Thus, quantitative data can be extracted and synthesized and data sets can be treated according to different research questions analyzing for example uses in specific areas, of different ethnic groups or user groups, which is essential for practical applications on a local level. In this article we give an overview on the technical structure and the content of the database and discuss at the end the possible output for practical application. The database was set up in the frame of the EU-funded Project UNDESERT.
Dynamics of juvenile woody plant communities on termite mounds in a West African savanna landscape
(2014)
Termites are keystone species in savanna ecology, and their mounds are thought to be an important source of habitat heterogeneity and structural complexity of the savanna. Macrotermes termitaria have been shown to allow woody plant colonisation of landscapes otherwise dominated by C4 grasses. In this study, we assess how resource-rich Macrotermes mounds affect juvenile woody plant and non-woody plant species diversity, community composition, biomass and population dynamics. We repeatedly sampled paired termite mound and savanna plots in Pendjari National Park (Sudanian vegetation zone, North Benin, West Africa) over the course of two years. Despite considerable overlap in their species pools, plant communities of mound and savanna plots were clearly separated in ordinations. Species richness and diversity of juvenile woody plants was consistently higher on termite mounds, while no differences could be detected for non-woody plants. Evenness of juvenile woody plants was generally lower on mounds, whereas density and basal area were higher on mounds. In contrast, we did not detect any influence of the mound microhabitat on colonisation, mortality and turnover of woody juveniles. Therefore, we suggest that differences in the communities on and off mounds should be strongly influenced by directed diaspore dispersal through zoochory.
Bei der Lorbeerkirsche handelt es sich um eine giftige Pflanze, deren toxische Wirkung durchaus nicht zu unterschätzen ist. Das Pflanzenporträt der Lorbeerkirsche dazu beitragen, die Art richtig ansprechen zu können, um mögliche Vergiftungen zu vermeiden. Darüber hinaus wird im Folgenden darüber informiert, welche positive Wirkung das beliebte Hecken- und Sichtschutzgehölz hat, wo die Art ursprünglich wächst und dass sie mittlerweile in milden Gebieten in Deutschland auch außerhalb der Gärten und Parks wild wachsend angetroffen werden kann.