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 ...
HELCOM Red List Melanitta fusca
... of velvet scoters at the beginning of the 20 century were caused by hunting activities and illegal poaching (Berndt & Hario 1997). Seaducks are among the species most seriously affected by mortality in gillnets, as the nets are mainly set in coastal areas and on shallow offshore banks, which are als ...
... of velvet scoters at the beginning of the 20 century were caused by hunting activities and illegal poaching (Berndt & Hario 1997). Seaducks are among the species most seriously affected by mortality in gillnets, as the nets are mainly set in coastal areas and on shallow offshore banks, which are als ...
Biodiversity - Pcpolytechnic
... • Island Biogeography – Everyplace is an island – Habitat fragmentation • Smaller fragments hold fewer species ...
... • Island Biogeography – Everyplace is an island – Habitat fragmentation • Smaller fragments hold fewer species ...
Diverse Matter - at www.arxiv.org.
... example, atoms are the base constituents that make molecules. Likewise at a higher level of hierarchy, cells are the base constituents that make organisms that make populations. Owing to the scale independent-formalism, one may, at each and every level of hierarchical organization, transform the for ...
... example, atoms are the base constituents that make molecules. Likewise at a higher level of hierarchy, cells are the base constituents that make organisms that make populations. Owing to the scale independent-formalism, one may, at each and every level of hierarchical organization, transform the for ...
Fulltext PDF
... Tribals, who disturb forest ecosystems by hunting the keystone wildlife, and today all of us humans who ‘alter the nature of their world’ [4], are said to be keystone habitat modifiers. The amazing efficiency with which the keystone functions in setting up new ecosystems and food webs by coral skele ...
... Tribals, who disturb forest ecosystems by hunting the keystone wildlife, and today all of us humans who ‘alter the nature of their world’ [4], are said to be keystone habitat modifiers. The amazing efficiency with which the keystone functions in setting up new ecosystems and food webs by coral skele ...
for saving species - Threatened Species Recovery Hub
... This is an exciting time, but we have little time to rest on the laurels of all our previous major wins in policy and management. More than ever before there is a need for truly applied research to deliver innovative solutions that will secure and recover Australia’s threatened fauna and flora. And ...
... This is an exciting time, but we have little time to rest on the laurels of all our previous major wins in policy and management. More than ever before there is a need for truly applied research to deliver innovative solutions that will secure and recover Australia’s threatened fauna and flora. And ...
The influence of biodiversity on invasibility of terrestrial plant
... resource model proposed by Davis et al. (2000). Riparian zones are subject to nutrient loading and seasonal disturbance, an important point to be discussed in the next section. Lonsdale (1999) examined global patterns of diversity and found that invasion increased with latitude and there is a positi ...
... resource model proposed by Davis et al. (2000). Riparian zones are subject to nutrient loading and seasonal disturbance, an important point to be discussed in the next section. Lonsdale (1999) examined global patterns of diversity and found that invasion increased with latitude and there is a positi ...
Filling Key Gaps in Population and Community Ecology
... summ.jsp?pims_id=12823&org=DEB&from=home) and to make recommendations for research priority areas in population and community ecology. This article summarizes the panel’s recommendations. The last such panel was convened in 1999 (Thompson et al. 2001), and we therefore report on recent progress and ...
... summ.jsp?pims_id=12823&org=DEB&from=home) and to make recommendations for research priority areas in population and community ecology. This article summarizes the panel’s recommendations. The last such panel was convened in 1999 (Thompson et al. 2001), and we therefore report on recent progress and ...
Selection criteria for suites of landscape species as a basis for site
... landscape must be connected to provide sufficient area for viable populations of each species. Species with population-level area requirements larger than individual habitat patches or management units were given a score of one. Spatially explicit population viability analyses for every species are ...
... landscape must be connected to provide sufficient area for viable populations of each species. Species with population-level area requirements larger than individual habitat patches or management units were given a score of one. Spatially explicit population viability analyses for every species are ...
JBS 64(3) RGB.indd - Universidad Veracruzana
... tubular or radially symmetrical flowers that act like a “mask” on the bat snout, but also brush-type inflorescences with many smaller flowers that open near simultaneously; 6) musty, “onion”-like flower odors, sometimes with sulphur-compounds; 7) diluted nectar (up to 17% of sugar); and 8) hexose-ri ...
... tubular or radially symmetrical flowers that act like a “mask” on the bat snout, but also brush-type inflorescences with many smaller flowers that open near simultaneously; 6) musty, “onion”-like flower odors, sometimes with sulphur-compounds; 7) diluted nectar (up to 17% of sugar); and 8) hexose-ri ...
Why Marine Islands Are Farther Apart in the Tropics.
... biochemical kinetics, and the energetic-equivalence rule. Science ...
... biochemical kinetics, and the energetic-equivalence rule. Science ...
- Wiley Online Library
... encouraged discussion of translocation conservation strategies that move beyond the focus of ‘at-risk’ species. These approaches consider larger spatial and temporal scales than customary, with the aim of recreating functioning ecosystems through a combination of large-scale ecological restoration a ...
... encouraged discussion of translocation conservation strategies that move beyond the focus of ‘at-risk’ species. These approaches consider larger spatial and temporal scales than customary, with the aim of recreating functioning ecosystems through a combination of large-scale ecological restoration a ...
Essential Biology 5 File
... Calculate the approximate number of bird species threatened by persecution/ predation only. ...
... Calculate the approximate number of bird species threatened by persecution/ predation only. ...
ALTERNATIVE COMPETITIVE STRATEGIES IN A PERIODICALL Y
... severe storm damage, but it is also partially protected by the reef crest from wave activity and water turbulence. This zone "abruptly gives way to a narrow zone which is populated almost exclusively by huge tree-like colonies of Acropora palmata that take the fulI force of the surf" (Goreau, 1959). ...
... severe storm damage, but it is also partially protected by the reef crest from wave activity and water turbulence. This zone "abruptly gives way to a narrow zone which is populated almost exclusively by huge tree-like colonies of Acropora palmata that take the fulI force of the surf" (Goreau, 1959). ...
Reinventing mutualism between humans and wild fauna
... Old World scavenger (Figure 1) that lives in open landscapes in arid and rugged regions. It breeds territorially but congregates in large numbers at communal roosts and feeding locations (del Hoyo et al . 1994). The species’dependenceonlivestockvarieslocally,butitcan be strong in places that lack na ...
... Old World scavenger (Figure 1) that lives in open landscapes in arid and rugged regions. It breeds territorially but congregates in large numbers at communal roosts and feeding locations (del Hoyo et al . 1994). The species’dependenceonlivestockvarieslocally,butitcan be strong in places that lack na ...
The Role of Benthic Invertebrate Species in Freshwater Ecosystems
... the most diverse order of insects in It is evident from studies of terresfresh water; they are in fact the most trial species that the number of spediversified of any major taxon of cies per se is not necessarily related freshwater organisms.” He estimated to rates of ecosystem production that more ...
... the most diverse order of insects in It is evident from studies of terresfresh water; they are in fact the most trial species that the number of spediversified of any major taxon of cies per se is not necessarily related freshwater organisms.” He estimated to rates of ecosystem production that more ...
Rewilding Europe with large herbivores: insights from Africa
... • We have to (re)discover the ecology of Europe’s large herbivores • Allow species to display their ’ecological potential’ • Remove the anthropogenic filters that shape their ecology ...
... • We have to (re)discover the ecology of Europe’s large herbivores • Allow species to display their ’ecological potential’ • Remove the anthropogenic filters that shape their ecology ...
Overgrazing their welcome
... both goats and wild donkeys are a serious problem in other emirates. Overgrazing does much more damage than just reducing the amount of plant cover in the desert. It suppresses the populations of smaller native animals, such as rodents, hares and lizards, by reducing the availability of their food. ...
... both goats and wild donkeys are a serious problem in other emirates. Overgrazing does much more damage than just reducing the amount of plant cover in the desert. It suppresses the populations of smaller native animals, such as rodents, hares and lizards, by reducing the availability of their food. ...
How similar can co-occurring species be in the presence of
... communities result from a number of processes occurring at different spatiotemporal scales. New species arise vía speciation and immigration. Species abundances are shaped by drift and selection, as well as ongoing dispersal. Therefore, selection, speciation, dispersal and ecological drift (understo ...
... communities result from a number of processes occurring at different spatiotemporal scales. New species arise vía speciation and immigration. Species abundances are shaped by drift and selection, as well as ongoing dispersal. Therefore, selection, speciation, dispersal and ecological drift (understo ...
Unit 2 Homework Sheet
... warm waters don’t flow north—poles cool, less melting e. Complicating factors: i. Synergy- 1 + 1 = More than 2 (adding two components together increases their individual effects) ii. Time delays- Effects of change take time. Example- Exposure to toxicant causes cancer 20 years later ...
... warm waters don’t flow north—poles cool, less melting e. Complicating factors: i. Synergy- 1 + 1 = More than 2 (adding two components together increases their individual effects) ii. Time delays- Effects of change take time. Example- Exposure to toxicant causes cancer 20 years later ...
Limits to evolution at range margins: when and why does adaptation
... [17,18]. These models are important because they link population ecology with genetics in that population density is a function of how closely the trait mean matches the trait optimum at that point on the gradient. In the Kirkpatrick and Barton model [18], when the population tracks the trait optimu ...
... [17,18]. These models are important because they link population ecology with genetics in that population density is a function of how closely the trait mean matches the trait optimum at that point on the gradient. In the Kirkpatrick and Barton model [18], when the population tracks the trait optimu ...
Concepts of species and modes of speciation
... any mechanism to explain the evolutionary change. Although initially he believed in morphological species concept, Buffon prepared the way for biological species concept using sterility barrier (instead of morphological similarities) as species criterion. Later on, the biological species concept was ...
... any mechanism to explain the evolutionary change. Although initially he believed in morphological species concept, Buffon prepared the way for biological species concept using sterility barrier (instead of morphological similarities) as species criterion. Later on, the biological species concept was ...
THE EcosysTEm 2 Structure 2.1
... by counting the numbers of organisms in an ecosystem and constructing a pyramid. Quantitative data for each trophic level are drawn to scale as horizontal bars arranged symmetrically around a central axis (Figure 2.4a). Sometimes, rather than counting every individual in a trophic level, limited col ...
... by counting the numbers of organisms in an ecosystem and constructing a pyramid. Quantitative data for each trophic level are drawn to scale as horizontal bars arranged symmetrically around a central axis (Figure 2.4a). Sometimes, rather than counting every individual in a trophic level, limited col ...
Community Ecology
... and swims away. The “carrier crab” in Figure 54.1 clearly benefits from having the sea urchin on its back. But how does the sea urchin fare in this relationship? Its association with the crab might harm it, help it, or have no effect on its survival and reproduction. Additional observations or experi ...
... and swims away. The “carrier crab” in Figure 54.1 clearly benefits from having the sea urchin on its back. But how does the sea urchin fare in this relationship? Its association with the crab might harm it, help it, or have no effect on its survival and reproduction. Additional observations or experi ...
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.