580 Pflanzen (Botanik)
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Diospyros L. is a large genus of flowering plants predominantly distributed in the tropics. It comprises over 700 species globally and around 300 are believed to occur in South-East Asia. Many species are economically important and exploited for the production of ebony wood and persimmons, yet taxonomic information on the genus is incomplete and inconsistent due to its morphological and nomenclatural complexity. Revisions of Diospyros in continental and insular South-East Asia were conducted independently by different authors, occasionally with different names used for the same species, or different species being given the same name in different countries. During our ongoing study of the genus Diospyros in Indochina (Cambodia, Laos, Thailand and Vietnam), we identified several such instances. Here, we clarify the most commonly misidentified species, including 1) D. apiculata Hiern, D. strigosa Hemsl. and D. tamiriensis Lecomte; 2) D. bejaudii Lecomte and D. retrofracta Bakh.; 3) D. dictyoneura Hiern and D. hasseltii Zoll.; 4) D. borneensis Hiern and D. fecunda H.R.Fletcher. Lectotypifications are also made for D. brachiata King & Gamble var. lanceolata H.R.Fletcher, D. fecunda, D. similis Craib and D. strigosa.
Field work in the Kibira National Park (Burundi), located in the Kivu-Ruwenzori system of the Afromontane Region, revealed the existence of a new species clearly belonging to the Argocoffeopsis-Calycosiphonia clade (Coffeeae, Rubiaceae). The species shows striking heterophylly: the plagiotropous branches have several nodes bearing reduced or even scaly leaves. For the rest, it shares characters with Calycosiphonia and Kupeantha. Therefore, a morphological comparison with the clade is done, as well as molecular phylogenetic analyses. The morphology of the novelty is closer to Kupeantha than to Calycosiphonia, inter alia because the anthers have no transverse septa, in contrast to the multilocellate anthers of Calycosiphonia. However, the molecular data advocate for a position in Calycosiphonia – a result weakening the morphological distinction between Calycosiphonia and Kupeantha. The former genus is no longer restricted to species with transverse septa in the anthers and with placental outgrowths around the seed. The new species is formally described as Calycosiphonia albertina Ntore & Robbr. sp. nov. Nomenclaturally, this placement is also the most conservative option. A taxonomic treatment, illustrations, a geographical distribution map, and a preliminary conservation assessment are provided. The previous inclusion of Calycosiphonia pentamera in Kupeantha based on morphology is here corroborated by molecular analyses.
Die von der Arbeitsgemeinschaft Forstliche Standorts- und Vegetationskunde (AFSV) herausgegebene Fachzeitschrift soll wichtige Forschungsergebnisse kommunizieren und Impulse geben. Ab dem Jahr 2008 begann sich das Themenspektrum der Vorläufer-Zeitschrift "Waldökologie online" (ISSN 1604-7103) durch einen Zusammenschluss mit dem traditionsreichen "Archiv für Naturschutz und Landschaftsforschung" (ISSN 0003-9306) zu erweitern. Die Fusionierung unter dem neuen Titel "Waldökologie, Landschaftsforschung und Naturschutz" war mit Heft 7 (2009) endgültig vollzogen.
Die Zeitschrift Tuexenia wird von der Floristisch-Soziologischen Arbeitsgemeinschaft e. V. (FlorSoz) herausgegeben und publiziert vorwiegend deutsch- und englischsprachige Originalarbeiten über floristische und vegetationskundliche Untersuchungen in Zentraleuropa, ihre theoretischen Grundlagen und Anwendungen in der Praxis. Sie erscheint in der Regel jährlich in einem Band mit rund 400 Seiten.
Die in Tuexenia publizierten Arbeiten werden in zahlreichen Referateorganen berücksichtigt, u.a. im Web of Science (Impact Factor: 1.516 nach Journal Citation Report 2013, Science Edition).
Weitere Informationen zu FlorSoz und zur Zeitschrift sind unter www.tuexenia.de verfügbar.
Over the last few decades, considerable attention has focused on small-scale studies of invasive plants and invaded systems. Unfortunately, small scale studies rarely provide comprehensive insight into the complexities of biological invasions at macroscales. Systematic and repeated monitoring of biological invasions at broad scales are rare. In this report, we highlight a unique invasive plant database from the national Forest Inventory and Analysis (FIA) program of the United States Forest Service. We demonstrate the importance and capability of this subcontinental-wide database by showcasing several critical macroscale invasion patterns that have emerged from its initial analysis: (1) large portion of the forests systems (39%) in the United States are impacted by invasive plants, (2) forests in the eastern United States harbor more invasive species than the western regions, (3) human land-use legacies at regional to national scalesb may drive large-scale invasion patterns. This accumulated dataset, which continues to grow in temporal richness with repeated measurements, will allow the understanding of invasion patterns and processes at multi-spatial and temporal scales. Such insights are not possible from smaller-scale studies, illustrating the benefit that can be gained by investing in the development of regional to continental-wide invasion monitoring programs elsewhere.
Kochia
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Die Zeitschrift Kochia wird von der Gesellschaft zur Erforschung der Flora Deutschlands (GEFD) herausgegeben; sie ist dem Botaniker Wilhelm Daniel Joseph Koch gewidmet und erscheint einmal jährlich, in der Regel im vierten Quartal. Nach Ablauf einer Frist von fünf Jahren wird der Inhalt der Kochia-Bände auf den Internet-Seiten der Gesellschaft sowie auf vifabioDOC online frei zugängig gemacht.
Tropical Bryology was introduced in 1989 by Jan-Peter Frahm and Robbert Gradstein (who later became the first scientific editor) to provide scientists a platform to present bryological research concerning the tropics. Besides encouraging tropical bryology the journal wants to promote researchers from the tropics. Being the first fully computer-produced cryptogamic journal it was also the first to provide electronic versions of the published volumes.
The subtitle "An International Journal on the Biology of Tropical Bryophytes and Lichens" was added with publication of volume 5 (1992).