580 Pflanzen (Botanik)
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Vegetation survey of the Barrington Tops and Mount Royal National Parks for use in fire management
(2000)
This paper reports on a vegetation study undertaken to enable the development of appropriate fire management strategies for the conservation of biodiversity. The approach taken is to relate fire response mechanisms reported for species within the literature to floristic patterns.
Floristic and environmental data were obtained from the National Parks and Wildlife Service. The data set was derived from 262 plots located within and around the study area. Data were analysed using classification, ordination, one way non-parametric analysis of variance, and correlation routines contained within the PATN computer package.
On the basis of this analysis, 14 vegetation communities were delineated including 12 non-rainforest communities. There was a strong relationship between the floristic pattern and a number of environmental variables, including altitude, climatic variables, geographic location, and geology. "Years since logging" and "Years since last fire" were also relatively highly correlated, but much of this data is based on subjective field estimates in relatively few sites, often several years after a fire had occurred and is therefore less reliable.
The relationships between floristic data and known plant fire response mechanisms, were generally weak, though significant. The weakness of the correlation is probably due to the lack of information on fire response for many species. On the basis of the existing data base, preliminary guidelines are provided on the nature of suitable fire regimes. Suggestions are given for further study of the floristic pattern, fire history, and other data required to guide ecological fire management in the future.
Background: The West African country of Burkina Faso (BFA) is an example for the enduring importance of traditional plant use today. A large proportion of its 17 million inhabitants lives in rural communities and strongly depends on local plant products for their livelihood. However, literature on traditional plant use is still scarce and a comprehensive analysis for the country is still missing.
Methods: In this study we combine the information of a recently published plant checklist with information from ethnobotanical literature for a comprehensive, national scale analysis of plant use in Burkina Faso. We quantify the application of plant species in 10 different use categories, evaluate plant use on a plant family level and use the relative importance index to rank all species in the country according to their usefulness. We focus on traditional medicine and quantify the use of plants as remedy against 22 classes of health disorders, evaluate plant use in traditional medicine on the level of plant families and rank all species used in traditional medicine according to their respective usefulness.
Results: A total of 1033 species (50%) in Burkina Faso had a documented use. Traditional medicine, human nutrition and animal fodder were the most important use categories. The 12 most common plant families in BFA differed considerably in their usefulness and application. Fabaceae, Poaceae and Malvaceae were the plant families with the most used species. In this study Khaya senegalensis, Adansonia digitata and Diospyros mespiliformis were ranked the top useful plants in BFA. Infections/Infestations, digestive system disorders and genitourinary disorders are the health problems most commonly addressed with medicinal plants. Fabaceae, Poaceae, Asteraceae, Apocynaceae, Malvaceae and Rubiaceae were the most important plant families in traditional medicine. Tamarindus indica, Vitellaria paradoxa and Adansonia digitata were ranked the most important medicinal plants.
Conclusions: The national-scale analysis revealed systematic patterns of traditional plant use throughout BFA. These results are of interest for applied research, as a detailed knowledge of traditional plant use can a) help to communicate conservation needs and b) facilitate future research on drug screening.
Aim: To provide distribution information and preliminary conservation assessments for all species of the pineapple family (Bromeliaceae), one of the most diverse and ecologically important plant groups of the American tropics—a global biodiversity hotspot. Furthermore, we aim to analyse patterns of diversity, endemism and the conservation status of the Bromeliaceae on the continental level in the light of their evolutionary history.
Location: The Americas.
Methods: We compiled a dataset of occurrence records for 3,272 bromeliad species (93.4% of the family) and modelled their geographic distribution using either climate‐based species distribution models, convex hulls or geographic buffers dependent on the number of occurrences available. We then combined this data with information on taxonomy and used the ConR software for a preliminary assessment of the conservation status of all species following Criterion B of the International Union for the Conservation of Nature (IUCN).
Results: Our results stress the Atlantic Forest in eastern Brazil, the Andean slopes, Central America and the Guiana Highlands as centres of bromeliad diversity and endemism. Phylogenetically ancient subfamilies of bromeliads are centred in the Guiana highlands whereas the large radiations of the group spread across different habitats and large geographic area. A total of 81% of the evaluated bromeliad species are Possibly Threatened with extinction. We provide range polygons for 3,272 species, as well as newly georeferenced point localities for 911 species in the novel “bromeliad” r package, together with functions to generate diversity maps for individual taxonomic or functional groups.
Main conclusions: Diversity centres of the Bromeliaceae agreed with macroecological patterns of other plant and animal groups, but show some particular patterns related to the evolutionary origin of the family, especially ancient dispersal corridors. A staggering 2/3rds of Bromeliaceae species might be threatened with extinction, especially so in tropical rain forests, raising concerns about the conservation of the family and bromeliad‐dependent animal species.
Using the MAXENT algorithm, we developed risk maps for eight invasive plant species in southern Transylvania, Romania, a region undergoing drastic land-use changes. Our findings show that invasion risk increased with landscape heterogeneity. Roads and agricultural areas were most prone to invasion, whereas forests were least at risk.
Seed production varies from year-to-year in most species. Factors influencing this variation can include pollination and dispersal mechanisms, seed predation and resource availability. Here we examine a long-term (12– year) photographic record of seed cone production for the Australian endemic conifer Wollemia nobilis (Araucariaceae). Coefficient of variation (a commonly used measure of variation in seed production) was low for the two trees analysed, compared with published values for other polycarpic plants. Nevertheless, cone production decreased with increasing spring minimum temperatures (during pollination) and increased with summer total rainfall (during cone initiation). Hence, Wollemia nobilis cone production was correlated with weather, in line with the resource-matching hypothesis. Impacts of variation in cone production on the Wollemia nobilis population are likely to be buffered by the shade-tolerant, slow-growing juvenile life stage of Wollemia nobilis.
In diesem Beitrag werden Neufunde (bezogen auf die Rastereinheit Messtischblatt-Quadrant) ab dem Jahr 2000 sowie Wiederbestätigungen bemerkenswerter Farn- und Blütenpflanzen in Sachsen-Anhalt genannt, welche die Kenntnisse über die Verbreitung der Arten im Bundesland erweitern sowie mögliche Tendenzen andeuten. Die zeitlichen Angaben beziehen sich auf den Kenntnisstand des „Verbreitungsatlas der Farn- und Blütenpflanzen Ostdeutschlands“ (BENKERT et al. 1996) sowie auf aktuelle Kartierungsmitteilungen.
Mit diesem Beitrag werden aktuelle Pflanzenfunde (bezogen auf die Rastereinheit Messtischblatt-Viertelquadrant) einiger Botaniker benannt sowie eine Kurzeinschätzung der Bedeutung der Funde mitgeteilt. Die Aktualität bezieht sich auf den Kenntnisstand des „Verbreitungsatlas der Farn- und Blütenpflanzen Ostdeutschlands“ (BENKERT et al. 1996) sowie auf aktuelle Kartierungsmitteilungen. Die Nomenklatur richtet sich nach BUTTLER et al. (2011).
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.