HELCOM Red List Clangula hyemalis
... temperate areas and are thus exposed to threats in both ecosystems. Although the reasons for the dramatic decline of the Baltic Sea winter population are not yet understood, various pressures were identified that have possibly caused or at least contributed to the observed declines. In the Arctic br ...
... temperate areas and are thus exposed to threats in both ecosystems. Although the reasons for the dramatic decline of the Baltic Sea winter population are not yet understood, various pressures were identified that have possibly caused or at least contributed to the observed declines. In the Arctic br ...
7th Annual EFJ Public Lecture - The Environmental Foundation of
... ‘Biodiversity Hotspots” are regions of the world that contain a large number of endemic species that are threatened with extinction. Endemic species are those found only in particular places, such as on particular islands – like Jamaica. The Caribbean is one of 25 recognized global hotspots, and Jam ...
... ‘Biodiversity Hotspots” are regions of the world that contain a large number of endemic species that are threatened with extinction. Endemic species are those found only in particular places, such as on particular islands – like Jamaica. The Caribbean is one of 25 recognized global hotspots, and Jam ...
Patterns in Ecology
... gather from Jim Brown, for instance, that although he has had considerable grant support for his pathbreaking field manipulation experiments, he has never had significant grant support for any of his work on largescale ecological patterns. I know of other similar cases, and it is a disgrace. Field m ...
... gather from Jim Brown, for instance, that although he has had considerable grant support for his pathbreaking field manipulation experiments, he has never had significant grant support for any of his work on largescale ecological patterns. I know of other similar cases, and it is a disgrace. Field m ...
Twenty years of community dynamics in a mixed conifer – broad
... Simonkai, Quercus crispula, Betula ermanii, and others (see Table 2 for a complete list). The forest was divided into 11 compartments (areas ranging from 5.6 to 17.6 ha) including a control compartment (5.9 ha). The dominant species showed no strong preferences in their spatial distributions (T. Yos ...
... Simonkai, Quercus crispula, Betula ermanii, and others (see Table 2 for a complete list). The forest was divided into 11 compartments (areas ranging from 5.6 to 17.6 ha) including a control compartment (5.9 ha). The dominant species showed no strong preferences in their spatial distributions (T. Yos ...
(Cyclura carinata) on Long Cay, Caicos Bank, Turks
... in July 1999. Although the cats seemed localised in certain parts of Long Cay, we set up bait stations that allowed us to systematically distribute the poison baits uniformly over the 3.5 km long island. Bait stations were marked with bright pink surveyor’s tape or bright red plastic cups, numbered, ...
... in July 1999. Although the cats seemed localised in certain parts of Long Cay, we set up bait stations that allowed us to systematically distribute the poison baits uniformly over the 3.5 km long island. Bait stations were marked with bright pink surveyor’s tape or bright red plastic cups, numbered, ...
Neutral Ecological Theory Reveals Isolation and Rapid Speciation
... and migration (14). The Bbiodiversity parameter,[ Q, represents the process of speciation within a Bmetacommunity,[ which is a very large collection of similar organisms found across a biogeographic region (4). This parameter is twice the product of the size of the metacommunity Jm (a very large num ...
... and migration (14). The Bbiodiversity parameter,[ Q, represents the process of speciation within a Bmetacommunity,[ which is a very large collection of similar organisms found across a biogeographic region (4). This parameter is twice the product of the size of the metacommunity Jm (a very large num ...
WWF Ecoregions - Verified Conservation Areas
... Worldwide, Deserts and Xeric Shrublands vary greatly in the amount of annual rainfall they receive; generally, however, evaporation exceeds rainfall in these ecoregions, usually less than 10 inches annually. Temperature variability is also extremely diverse in these remarkable lands. Many deserts, s ...
... Worldwide, Deserts and Xeric Shrublands vary greatly in the amount of annual rainfall they receive; generally, however, evaporation exceeds rainfall in these ecoregions, usually less than 10 inches annually. Temperature variability is also extremely diverse in these remarkable lands. Many deserts, s ...
DRAFT BA Y-DELTA OVERSIGHT
... almost impossible to define management actions that will result in specific changes in populations of target species and that deliberations regarding these actions should recognize that they may not achieve their intended objectives because of this instability. In addition, he believes federal and s ...
... almost impossible to define management actions that will result in specific changes in populations of target species and that deliberations regarding these actions should recognize that they may not achieve their intended objectives because of this instability. In addition, he believes federal and s ...
Biological Diversity - Punjab Biodiversity Board
... such as taste or flavour, can be perceived by other senses; and some are invisible, such as susceptibility to disease. ...
... such as taste or flavour, can be perceived by other senses; and some are invisible, such as susceptibility to disease. ...
2006 Invasive Species
... abundance and consequently may damage valued environmental, agricultural or personal resources The State of Australia’s Birds series presents an overview of the status of Australia’s birds, the major threats they face and the conservation actions needed. This fourth annual report focuses on invasive ...
... abundance and consequently may damage valued environmental, agricultural or personal resources The State of Australia’s Birds series presents an overview of the status of Australia’s birds, the major threats they face and the conservation actions needed. This fourth annual report focuses on invasive ...
two degrees of separation in complex food webs
... else”. Had we found a D larger than three, as in other complex, small-world networks12,30, the adage would have been undermined by the suggestion that substantial fractions of species are functionally isolated from one another. Our findings appear to make this possibility unlikely. Overall, the robu ...
... else”. Had we found a D larger than three, as in other complex, small-world networks12,30, the adage would have been undermined by the suggestion that substantial fractions of species are functionally isolated from one another. Our findings appear to make this possibility unlikely. Overall, the robu ...
PestSmart Report Template
... dumps) of food and other resources. Feral cats have a flexible ecology and an extremely broad diet. This helps drive their ecological impact as they can kill and consume all individuals of a species in an area, causing local extinction, and then readily shift to another prey item without lasting con ...
... dumps) of food and other resources. Feral cats have a flexible ecology and an extremely broad diet. This helps drive their ecological impact as they can kill and consume all individuals of a species in an area, causing local extinction, and then readily shift to another prey item without lasting con ...
atlas of the honeydew producing conifer aphids of
... This small volume on such an interesting group of insects like aphids intends to give a detailed information on those forest aphid species which feed on conifers and are known to produce much more and better honeydew than others. In fact, that aphid honeydew is more searched and appreciated by bees ...
... This small volume on such an interesting group of insects like aphids intends to give a detailed information on those forest aphid species which feed on conifers and are known to produce much more and better honeydew than others. In fact, that aphid honeydew is more searched and appreciated by bees ...
Coexistence and invasibility in a two-species competition
... can be a promising way to disentangle these effects (Daleo et al., ...
... can be a promising way to disentangle these effects (Daleo et al., ...
The Extinction Crisis
... Patterns of Extinction – Reasons for differences in extinction rate (cont.) • Island species may have evolved in the absence of terrestrial predators – Characteristics contributing to extinction ...
... Patterns of Extinction – Reasons for differences in extinction rate (cont.) • Island species may have evolved in the absence of terrestrial predators – Characteristics contributing to extinction ...
Floristic and diversity trend of regeneration in a quartz dominated
... and provision of alternative rehabilitation areas after operations. Quarry processes are usually carried out for several years and rehabilitation offer a way of returning abandoned sites to a more desirable ecological state. Rehabilitation is any manipulation of a successional sequence that enhances ...
... and provision of alternative rehabilitation areas after operations. Quarry processes are usually carried out for several years and rehabilitation offer a way of returning abandoned sites to a more desirable ecological state. Rehabilitation is any manipulation of a successional sequence that enhances ...
Including species interactions in risk assessments for global change
... Most ecological risk assessments for global change are restricted to the effects of trends in climate or atmospheric carbon dioxide. In order to move beyond investigation of the effects of climate alone, the CLIMEXt model was extended to investigate the effects of species interactions, in the same o ...
... Most ecological risk assessments for global change are restricted to the effects of trends in climate or atmospheric carbon dioxide. In order to move beyond investigation of the effects of climate alone, the CLIMEXt model was extended to investigate the effects of species interactions, in the same o ...
Recovery After Mass Extinction: Evolutionary assembly in large
... final recovery of the open-ocean ecosystem structure required the evolution of new species and more than three million years. The late Cenomanian event gives a similarly well-defined example of marine food chain recovery (Hart, 1996). Late Cenomanian ecosystems have been reconstructed prior to the s ...
... final recovery of the open-ocean ecosystem structure required the evolution of new species and more than three million years. The late Cenomanian event gives a similarly well-defined example of marine food chain recovery (Hart, 1996). Late Cenomanian ecosystems have been reconstructed prior to the s ...
Vegetational changes over an eleven-year period in
... stems/ha (Table 1). Without introduction of prescribed fires and/or mowing, this trend will most likely continue. Table 2 shows absolute cover for all species recorded along the 30 m transects. Percentage values are absolute cover as recorded in point-line intercept transects. Absolute cover plots r ...
... stems/ha (Table 1). Without introduction of prescribed fires and/or mowing, this trend will most likely continue. Table 2 shows absolute cover for all species recorded along the 30 m transects. Percentage values are absolute cover as recorded in point-line intercept transects. Absolute cover plots r ...
CONSERVATION OF BIODIVERSITY
... • Mechanism for man of biodiversity in SA • Min to proclaim biodiversity framework (which covers the whole of SA identifies certain geographical features, topographical and indicates where everything is. • Bioregions must be declared by minister or MEC ( which are identified for specific features in ...
... • Mechanism for man of biodiversity in SA • Min to proclaim biodiversity framework (which covers the whole of SA identifies certain geographical features, topographical and indicates where everything is. • Bioregions must be declared by minister or MEC ( which are identified for specific features in ...
PIF Handbook on Species Assessment and Prioritization
... abundance of each species in a PA/BCR (i.e., 1 reflects low abundance, 5 reflects high abundance). AI may be calculated for breeding or wintering populations. In addition, the percent of total species population (%POP) occurring in each area is included as another measure of stewardship responsibil ...
... abundance of each species in a PA/BCR (i.e., 1 reflects low abundance, 5 reflects high abundance). AI may be calculated for breeding or wintering populations. In addition, the percent of total species population (%POP) occurring in each area is included as another measure of stewardship responsibil ...
Effect of Elevation and Type of Habitat on the Abundance and
... beneath a pole (250 cm height) and the substrate at 2 points right and left of the bar at 1-m intervals. Total plant cover at each site was expressed as a percentage of contacts with vegetation. Also, plant cover (percentage) at different 10-cm-height intervals, from 0-10 cm to 250 cm and above, was ...
... beneath a pole (250 cm height) and the substrate at 2 points right and left of the bar at 1-m intervals. Total plant cover at each site was expressed as a percentage of contacts with vegetation. Also, plant cover (percentage) at different 10-cm-height intervals, from 0-10 cm to 250 cm and above, was ...
Birds as marine–terrestrial linkages in sub-polar archipelagic
... Furthermore, due to the recent glaciations of this region (10,000 BP) and its insular nature, in the extreme southern portion of the Americas, birds are the most diverse, abundant, and conspicuous terrestrial vertebrates (Venegas and Sielfeld 1998). As a result, they occupy a high variety of niches ...
... Furthermore, due to the recent glaciations of this region (10,000 BP) and its insular nature, in the extreme southern portion of the Americas, birds are the most diverse, abundant, and conspicuous terrestrial vertebrates (Venegas and Sielfeld 1998). As a result, they occupy a high variety of niches ...
Island restoration
The ecological restoration of islands, or island restoration, is the application of the principles of ecological restoration to islands and island groups. Islands, due to their isolation, are home to many of the world's endemic species, as well as important breeding grounds for seabirds and some marine mammals. Their ecosystems are also very vulnerable to human disturbance and particularly to introduced species, due to their small size. Island groups such as New Zealand and Hawaii have undergone substantial extinctions and losses of habitat. Since the 1950s several organisations and government agencies around the world have worked to restore islands to their original states; New Zealand has used them to hold natural populations of species that would otherwise be unable to survive in the wild. The principal components of island restoration are the removal of introduced species and the reintroduction of native species.