Number of crop species and number of plant families
... The number of different crop species and crop families involved in an agroecosystem are essential determinants of biodiversity, as the strength of the agricultural community relies largely on these two measures. According to Gliessman, the agroecologist “knows that a certain level of complexity is d ...
... The number of different crop species and crop families involved in an agroecosystem are essential determinants of biodiversity, as the strength of the agricultural community relies largely on these two measures. According to Gliessman, the agroecologist “knows that a certain level of complexity is d ...
Global Biodiversity Outlook 3
... birds were thought to survive in the wild. Conservation efforts coupled with the release of some captive-bred birds brought the estimated population to more than 100 individuals by 2008, but numbers continue to fluctuate from year to year. ...
... birds were thought to survive in the wild. Conservation efforts coupled with the release of some captive-bred birds brought the estimated population to more than 100 individuals by 2008, but numbers continue to fluctuate from year to year. ...
The Future of Marine Animal Populations
... results will be synthesized in two main synthesis products: A toolbox paper will describe the multiple approaches of reconstructing long-term trends and how to compare results across species and studies. A review paper will then synthesize the temporal changes in marine animal abundance, distributio ...
... results will be synthesized in two main synthesis products: A toolbox paper will describe the multiple approaches of reconstructing long-term trends and how to compare results across species and studies. A review paper will then synthesize the temporal changes in marine animal abundance, distributio ...
Ecological monitoring in Cambridge Bay
... Ecosites have been combined into the dry or wet categories to better show the pattern. No significant differences have been observed between the two dry or the two wet ecosites (Fig. 2.1 and Table 2.1). Species identity is portrayed on the x-axis by its code (species names can be found in Table 2.3) ...
... Ecosites have been combined into the dry or wet categories to better show the pattern. No significant differences have been observed between the two dry or the two wet ecosites (Fig. 2.1 and Table 2.1). Species identity is portrayed on the x-axis by its code (species names can be found in Table 2.3) ...
Measuring and monitoring Biodiversity in Tropical
... communities of cavity-nesting birds in deciduous forest with those in evergreen forest, or the communities of benthic organisms in flowing water with those in still water. To facilitate comparisons it is desirable to measure quantitatively an attribute of each community that can be called its diver ...
... communities of cavity-nesting birds in deciduous forest with those in evergreen forest, or the communities of benthic organisms in flowing water with those in still water. To facilitate comparisons it is desirable to measure quantitatively an attribute of each community that can be called its diver ...
Genetic Diversity
... Three Threats to Biodiversity • Most species loss can be traced to three major threats: – Habitat destruction – Introduced species – Overexploitation ...
... Three Threats to Biodiversity • Most species loss can be traced to three major threats: – Habitat destruction – Introduced species – Overexploitation ...
- White Rose Research Online
... provide estimates of large-scale patterns in diversity. Terrestrial and freshwater plants and vertebrates have retained a disproportionate hold on people’s interest over the last two centuries. This preoccupation can be seen from the proportion of space devoted to them by authors from Linnaeus (1758 ...
... provide estimates of large-scale patterns in diversity. Terrestrial and freshwater plants and vertebrates have retained a disproportionate hold on people’s interest over the last two centuries. This preoccupation can be seen from the proportion of space devoted to them by authors from Linnaeus (1758 ...
Connections between species diversity and genetic diversity
... and therefore genetic diversity for neutral traits as well. At the most basic level, selection favours some individuals over others and these individuals may represent different species or different genetic variants within species. There are far too many selection-based theories of diversity in comm ...
... and therefore genetic diversity for neutral traits as well. At the most basic level, selection favours some individuals over others and these individuals may represent different species or different genetic variants within species. There are far too many selection-based theories of diversity in comm ...
Applying resource selection functions at multiple scales to prioritize
... selection and suitability include: (1) habitat type, with preference for highland over lowland forest, and (2) human utilization, particularly hunting, with CRG preferring steeper, higher elevation areas that are farther from villages and harder for humans to access (Groves, 2002; McFarland, 2007; B ...
... selection and suitability include: (1) habitat type, with preference for highland over lowland forest, and (2) human utilization, particularly hunting, with CRG preferring steeper, higher elevation areas that are farther from villages and harder for humans to access (Groves, 2002; McFarland, 2007; B ...
The eu Biodiversity Strategy to 2020
... The Six Targets of the Biodiversity Strategy.....................................................................................................................................................................11 TARGET 1 Fully implement the Birds and Habitats Directives............................ ...
... The Six Targets of the Biodiversity Strategy.....................................................................................................................................................................11 TARGET 1 Fully implement the Birds and Habitats Directives............................ ...
Fivemile Butte Rangeland Health Assessment
... sage-grouse habitat are being met. Overall, this standard is being met for wildlife species within this allotment. The abundance of cheatgrass and amount of salt desert-shrub communities appear to be the limiting factors for sage-grouse and most sagebrush dependant wildlife species. Efforts to impro ...
... sage-grouse habitat are being met. Overall, this standard is being met for wildlife species within this allotment. The abundance of cheatgrass and amount of salt desert-shrub communities appear to be the limiting factors for sage-grouse and most sagebrush dependant wildlife species. Efforts to impro ...
1: Summary and Options for Congress
... has more diversity than the same rangeland after heavy grazing has eliminated or greatly reduced the frequency of the perennial grass species. c Genetic diversity: Economically useful crops are developed from wild plants by selecting valuable inheritable characteristics. Thus, many wild ancestor pla ...
... has more diversity than the same rangeland after heavy grazing has eliminated or greatly reduced the frequency of the perennial grass species. c Genetic diversity: Economically useful crops are developed from wild plants by selecting valuable inheritable characteristics. Thus, many wild ancestor pla ...
Ranking the feeding habitats of Grey
... temporal knowledge of nectar resources for wildlife in northern Australia, the final maps are limited as tools for planners by the large scale at which they were produced (1:1,000,000) and the fact that the variability and reliability of the resource were not incorporated. More recently an approach ...
... temporal knowledge of nectar resources for wildlife in northern Australia, the final maps are limited as tools for planners by the large scale at which they were produced (1:1,000,000) and the fact that the variability and reliability of the resource were not incorporated. More recently an approach ...
Market access, population density, and socioeconomic development
... 1997). This includes fish that remove part of the reef by scraping or excavating the substratum, and grazers that mainly ingest filamentous algae (censu Choat et al., 2002). Herbivores are thought to play a critical role in the resilience of coral reef ecosystems by preventing algal overgrowth that ca ...
... 1997). This includes fish that remove part of the reef by scraping or excavating the substratum, and grazers that mainly ingest filamentous algae (censu Choat et al., 2002). Herbivores are thought to play a critical role in the resilience of coral reef ecosystems by preventing algal overgrowth that ca ...
report - BirdLife International
... area – carrying out vital research and lobbying the government for formal protection. These efforts have been remarkably successful. As of 9th May 2016, the Government of Cambodia has declared all 132,321 ha of the forest as a Wildlife Sanctuary. ...
... area – carrying out vital research and lobbying the government for formal protection. These efforts have been remarkably successful. As of 9th May 2016, the Government of Cambodia has declared all 132,321 ha of the forest as a Wildlife Sanctuary. ...
Understanding Rangeland Biodiversity
... often though to be recent phenomena, brought about by overstocking etc. But this distinction is artificial and partly results from the time-scale over which a landscape is viewed. Grazing by herbivores changes the composition of landscape over time even without human interference and evidence for hu ...
... often though to be recent phenomena, brought about by overstocking etc. But this distinction is artificial and partly results from the time-scale over which a landscape is viewed. Grazing by herbivores changes the composition of landscape over time even without human interference and evidence for hu ...
RESILIENCE OF TROPICAL ECOSYSTEMS – FUTURE
... This conference is special in so far as it is the second hosted outside Germany. gtö was founded in Germany and established under German law as a non-profit organization. A few years ago the Board decided to make gtö more international. One step to achieve this is to have conferences outside Germany ...
... This conference is special in so far as it is the second hosted outside Germany. gtö was founded in Germany and established under German law as a non-profit organization. A few years ago the Board decided to make gtö more international. One step to achieve this is to have conferences outside Germany ...
limiting resources and the regulation of diversity in phytoplankton
... All samples were collected during the summers of 1996 and 1997. Samples were taken at the lake outlets in May, before ice out, and at one main pelagic sampling station in each lake throughout the summer. Collections were made on a weekly basis from both Yellowstone and Jackson Lakes. Samples were co ...
... All samples were collected during the summers of 1996 and 1997. Samples were taken at the lake outlets in May, before ice out, and at one main pelagic sampling station in each lake throughout the summer. Collections were made on a weekly basis from both Yellowstone and Jackson Lakes. Samples were co ...
book of abstracts
... This conference is special in so far as it is the second hosted outside Germany. gtö was founded in Germany and established under German law as a non-profit organization. A few years ago the Board decided to make gtö more international. One step to achieve this is to have conferences outside Germany ...
... This conference is special in so far as it is the second hosted outside Germany. gtö was founded in Germany and established under German law as a non-profit organization. A few years ago the Board decided to make gtö more international. One step to achieve this is to have conferences outside Germany ...
Density, distribution, and attributes of tree cavities in an
... are comprised of ca 100 woody spp ≥ 10 cm diameter/ha, and are dominated by Pentaclethra macroloba (Mimosoideae) in the canopy and palms (Aracaceae) in the understory (Lieberman et al. 1996, Clark & Clark 2000). We studied cavities in 12 of 18 0.5 ha (100 × 50 m) plots established for an ongoing stu ...
... are comprised of ca 100 woody spp ≥ 10 cm diameter/ha, and are dominated by Pentaclethra macroloba (Mimosoideae) in the canopy and palms (Aracaceae) in the understory (Lieberman et al. 1996, Clark & Clark 2000). We studied cavities in 12 of 18 0.5 ha (100 × 50 m) plots established for an ongoing stu ...
Fungi from the roots of the common terrestrial orchid
... Early studies on the specificity between orchids and their mycorrhizal fungi were mainly based on cultivation methods or germination tests under laboratory conditions and found a considerable phylogenetic breadth of associated fungi (Curtis 1939; Knudson 1922). However, physiological compatibility u ...
... Early studies on the specificity between orchids and their mycorrhizal fungi were mainly based on cultivation methods or germination tests under laboratory conditions and found a considerable phylogenetic breadth of associated fungi (Curtis 1939; Knudson 1922). However, physiological compatibility u ...
These_4_niveau 2 et 3 - Chaire CRSNG/Hydro
... relation between biodiversity and ecosystem functioning (BEF) began. After more than 20 years of BEF research, general consensus leans toward increasing productivity, resource capture and decomposition with diversity. The two main mechanisms proposed to underlie this positive relationship are niche ...
... relation between biodiversity and ecosystem functioning (BEF) began. After more than 20 years of BEF research, general consensus leans toward increasing productivity, resource capture and decomposition with diversity. The two main mechanisms proposed to underlie this positive relationship are niche ...
CBD Fourth National Report - Botswana (English version)
... 2.3.2 Long-term conservation of Botswana's biological diversity, genetic resources and related knowledge .......................................................................................................................... 58 ...
... 2.3.2 Long-term conservation of Botswana's biological diversity, genetic resources and related knowledge .......................................................................................................................... 58 ...
what do we mean by biodiversity?
... diversification that leads to speciation (Wade 2007), for example. It applies to many levels of biological organization (ecosystems, communities or genomes) and components (genes, individuals, species or biochemical ...
... diversification that leads to speciation (Wade 2007), for example. It applies to many levels of biological organization (ecosystems, communities or genomes) and components (genes, individuals, species or biochemical ...
Tropical Andes
The Tropical Andes is a subregion of the Andes spanning all of the Andes except the southern mediterranean and temperate zones. The Tropical Andes area spans 1,542,644 km2.