Are We Missing the Forest for the Trees?
... diversity, each of which have ample empirical support. These theories include: 1) niche differentiation; 2) negative density dependence; 3) disturbance; and 4) neutral dynamics with respect to competition. We ...
... diversity, each of which have ample empirical support. These theories include: 1) niche differentiation; 2) negative density dependence; 3) disturbance; and 4) neutral dynamics with respect to competition. We ...
EXPLAINING THE INVASIVE SUCCESS OF THE EASTERN MOSQUITOFISH (GAMBUSIA HOLBROOKI):
... and season; however, mosquitofish growth and water features of lowland streams depended more strongly on local factors than latitude and season, even in the case of water temperature. We concluded that latitudinal differences in temperature have the potential to cascade through stream ecosystems inf ...
... and season; however, mosquitofish growth and water features of lowland streams depended more strongly on local factors than latitude and season, even in the case of water temperature. We concluded that latitudinal differences in temperature have the potential to cascade through stream ecosystems inf ...
file - ORCA
... and Woods (2007)). In this paper, however, we want to make it explicit from the outset that, while there are many instances where ‘wildness’ can be identified as a component of ‘wilderness’ objectives (Cole, 2000), we do not equate the former with the latter. Instead, we follow Robert Chapman’s rej ...
... and Woods (2007)). In this paper, however, we want to make it explicit from the outset that, while there are many instances where ‘wildness’ can be identified as a component of ‘wilderness’ objectives (Cole, 2000), we do not equate the former with the latter. Instead, we follow Robert Chapman’s rej ...
Human acceleration of animal and plant extinctions: A Late
... event), when 76% of the world’s species went extinct within a few millennia (Renne et al., 2013). Most scientists implicate a large asteroid impact ca. 65.5 mya as the prime driver for this mass extinction, characterized by the disappearance of non-avian dinosaurs and the dawn of the age of mammals ...
... event), when 76% of the world’s species went extinct within a few millennia (Renne et al., 2013). Most scientists implicate a large asteroid impact ca. 65.5 mya as the prime driver for this mass extinction, characterized by the disappearance of non-avian dinosaurs and the dawn of the age of mammals ...
overview of the management methods adopted for the control of
... the animals directly and these samples can then be used to identify the presence of species which are elusive, such as the mink (Waits and Paetkaud 2005). Restriction enzyme-based techniques have been developed to differentiate mtDNA of otter (Lutra lutra), American mink (Mustel vison), and polecat ...
... the animals directly and these samples can then be used to identify the presence of species which are elusive, such as the mink (Waits and Paetkaud 2005). Restriction enzyme-based techniques have been developed to differentiate mtDNA of otter (Lutra lutra), American mink (Mustel vison), and polecat ...
The interaction between habitat conditions, ecosystem
... concepts being characterised by a lack of empirical data and few well-designed field investigations. Mathematical models have produced inconclusive results showing that more diverse ecosystems can be either more or less stable than simpler ecosystems, depending on the ecosystem under investigation. ...
... concepts being characterised by a lack of empirical data and few well-designed field investigations. Mathematical models have produced inconclusive results showing that more diverse ecosystems can be either more or less stable than simpler ecosystems, depending on the ecosystem under investigation. ...
Uganda - BirdLife Data Zone
... for birds in Africa, with 1,007 species so far recorded (Carswell et al. in press), of which c.800 resident and Afrotropical migrant species breed or are assumed to breed. This species richness is partly explained by the diversity of land-forms and habitats, ranging from snow-capped mountain-tops in ...
... for birds in Africa, with 1,007 species so far recorded (Carswell et al. in press), of which c.800 resident and Afrotropical migrant species breed or are assumed to breed. This species richness is partly explained by the diversity of land-forms and habitats, ranging from snow-capped mountain-tops in ...
Biodiversity PPT Revised
... A. insects that have to adapt to an urban environment B. small mammals that live in urban ecosystems C. birds that can only survive in rural ecosystems D. mammals that need an undeveloped habitat to breed successfully ...
... A. insects that have to adapt to an urban environment B. small mammals that live in urban ecosystems C. birds that can only survive in rural ecosystems D. mammals that need an undeveloped habitat to breed successfully ...
Landscape Infrastructure and Sustainable Agriculture (LISA)
... The use of key species lists for recording the species richness in transect walks in arable land, in permanent cultures and on grassland; The recording of landscape elements and of buffer strips as well as of ecological sensitive areas may be important in respect of nature value and good farming pra ...
... The use of key species lists for recording the species richness in transect walks in arable land, in permanent cultures and on grassland; The recording of landscape elements and of buffer strips as well as of ecological sensitive areas may be important in respect of nature value and good farming pra ...
Saltcedar Integrated Weed Management and the Endangered
... The southwestern willow flycatcher (Empidonax traillii extimus), designated a Federal endangered species in 1995, also nests in saltcedar. It is a neotropical migrant, a riparian obligate species, and insectivorous. The southwestern willow flycatcher is one of four subspecies found in the western Un ...
... The southwestern willow flycatcher (Empidonax traillii extimus), designated a Federal endangered species in 1995, also nests in saltcedar. It is a neotropical migrant, a riparian obligate species, and insectivorous. The southwestern willow flycatcher is one of four subspecies found in the western Un ...
Biological Synopsis
... Heavy encrustations of Lacy Crust can be found on native species of kelp, which often leads to defoliation during periods of intense wave action. Synergistic interactions between Lacy Crust and an invasive green alga Codium fragile ssp. have caused devastation of native kelp beds in some regions. Th ...
... Heavy encrustations of Lacy Crust can be found on native species of kelp, which often leads to defoliation during periods of intense wave action. Synergistic interactions between Lacy Crust and an invasive green alga Codium fragile ssp. have caused devastation of native kelp beds in some regions. Th ...
neinvasives.com
... olive-green. They are also called oriental mystery snails, chinese applesnail, and trapdoor snails. HABITAT – Found in freshwater at the sediment surface or slightly buried; prefers fine clean sand, clay, and coarse sand, although this species may be found on most any underwater ...
... olive-green. They are also called oriental mystery snails, chinese applesnail, and trapdoor snails. HABITAT – Found in freshwater at the sediment surface or slightly buried; prefers fine clean sand, clay, and coarse sand, although this species may be found on most any underwater ...
albatross species demonstrate regional differences in north pacific
... loads in these two albatross species are unlikely due to feeding at different trophic levels. Stable isotopes can be used, in addition to diet comparisons, to investigate the trophic ecology of seabirds (Hobson et al. 1994, Kelly 2000). Nitrogen stable isotopes in whole blood of Black-footed and Lay ...
... loads in these two albatross species are unlikely due to feeding at different trophic levels. Stable isotopes can be used, in addition to diet comparisons, to investigate the trophic ecology of seabirds (Hobson et al. 1994, Kelly 2000). Nitrogen stable isotopes in whole blood of Black-footed and Lay ...
White Shark (Carcharodon carcharias)
... plant or other organism, other than a bacterium or virus, that is wild by nature and it is either native to Canada or has extended its range into Canada without human intervention and has been present in Canada for at least 50 years. A wildlife species that no longer exists. A wildlife species no lo ...
... plant or other organism, other than a bacterium or virus, that is wild by nature and it is either native to Canada or has extended its range into Canada without human intervention and has been present in Canada for at least 50 years. A wildlife species that no longer exists. A wildlife species no lo ...
Indirect effects of invasive species affecting the population structure
... 2002, Grosholz 2002). However, the effects of non-native species are not always negative. For example, ecosystems that suffered high (humanbased) disturbance in the past, may benefit from the arrival of newcomers that fill vacant ecological niches (Donlan et al. 2006, Griffiths et al. 2010). Moreove ...
... 2002, Grosholz 2002). However, the effects of non-native species are not always negative. For example, ecosystems that suffered high (humanbased) disturbance in the past, may benefit from the arrival of newcomers that fill vacant ecological niches (Donlan et al. 2006, Griffiths et al. 2010). Moreove ...
Feral Swine in North America
... Introduction and Biology Feral swine (Sus scrofa) are members of the domestic swine family Suidae, which is native to Europe and Asia, not North America. Feral swine should not be confused with North America’s only native pig-like animal – the collared peccary, or javelina (Pecari tajacu), of the fa ...
... Introduction and Biology Feral swine (Sus scrofa) are members of the domestic swine family Suidae, which is native to Europe and Asia, not North America. Feral swine should not be confused with North America’s only native pig-like animal – the collared peccary, or javelina (Pecari tajacu), of the fa ...
5.1 Celtic Sea Ecoregion-Ecosystem overview
... species, several of them remain vulnerable to existing fisheries. Spurdog and the common skate complex are caught as bycatch in mixed demersal trawl fisheries and gillnet fisheries, and deep-water sharks are caught in the mixed deep-water trawl fishery. Impacts on seabirds and marine mammals Longlin ...
... species, several of them remain vulnerable to existing fisheries. Spurdog and the common skate complex are caught as bycatch in mixed demersal trawl fisheries and gillnet fisheries, and deep-water sharks are caught in the mixed deep-water trawl fishery. Impacts on seabirds and marine mammals Longlin ...
Reducing the Impact of Cats on Birds and Wildlife
... feral cats established in most areas near human settlement. There are about 8.5 million pet cats and between 1.4 and 4.2 million feral cats in Canada. In total, these cats are estimated to kill between 105 348 million birds and destroy 2 million bird nests in Canada every year.1 Bird species that ne ...
... feral cats established in most areas near human settlement. There are about 8.5 million pet cats and between 1.4 and 4.2 million feral cats in Canada. In total, these cats are estimated to kill between 105 348 million birds and destroy 2 million bird nests in Canada every year.1 Bird species that ne ...
Docket No. FWS–HQ–ES–2
... any species that is likely to become an endangered species within the foreseeable future throughout all or a significant portion of its range. Through the Federal rulemaking process, we add species that meet these definitions to the List of Endangered and Threatened Wildlife at 50 CFR 17.11 or the L ...
... any species that is likely to become an endangered species within the foreseeable future throughout all or a significant portion of its range. Through the Federal rulemaking process, we add species that meet these definitions to the List of Endangered and Threatened Wildlife at 50 CFR 17.11 or the L ...
14. Diversity of Life in the Coastal Bays
... Jane E. Thomas, Catherine E. Wazniak, David E. Wilson, & Carl S. Zimmerman ...
... Jane E. Thomas, Catherine E. Wazniak, David E. Wilson, & Carl S. Zimmerman ...
Interactions between phytoplankton, zooplankton and fish in the
... plicatilis, Polyarthra vulgaris). Latter group shows a positive correlation with Zygophyceae and Cyanophyceae. We found a correlation between the densities of phytoplankton and Zooplankton. This may be due to two main factors: nutrient regeneration by Zooplankton, which leads to an increase in Phyto ...
... plicatilis, Polyarthra vulgaris). Latter group shows a positive correlation with Zygophyceae and Cyanophyceae. We found a correlation between the densities of phytoplankton and Zooplankton. This may be due to two main factors: nutrient regeneration by Zooplankton, which leads to an increase in Phyto ...
The effect of obligate hyperparasitoids on biological control: Differential
... 1. Introduction Biological control theory suggests that consumer species can effectively suppress their host or prey populations (Hairston et al., 1960; Crawley, 1989). However, the strong top-down effect of consumers not only influences the population size of prey/hosts, but can indirectly influenc ...
... 1. Introduction Biological control theory suggests that consumer species can effectively suppress their host or prey populations (Hairston et al., 1960; Crawley, 1989). However, the strong top-down effect of consumers not only influences the population size of prey/hosts, but can indirectly influenc ...
Northern Barrens Tiger Beetle
... This species is a globally rare insect found in eastern North America, with its native range extending from West Virginia north to southern Ontario and southern Quebec. In Ontario, only two populations have been observed: Constance Bay, along the Ottawa River, near Ottawa, and Pinery Provincial Park ...
... This species is a globally rare insect found in eastern North America, with its native range extending from West Virginia north to southern Ontario and southern Quebec. In Ontario, only two populations have been observed: Constance Bay, along the Ottawa River, near Ottawa, and Pinery Provincial Park ...
1992 Gull-billed tern
... except that the breeding population may be only 100 pairs and thus a candidate for endangered status (C. Molina pers. comm.). In the Southeast, Clapp and Buckley (1984) estimated a population of 3,019 pairs of gull-billed terns, which they believed to represent 95% of the U.S. population and perhaps ...
... except that the breeding population may be only 100 pairs and thus a candidate for endangered status (C. Molina pers. comm.). In the Southeast, Clapp and Buckley (1984) estimated a population of 3,019 pairs of gull-billed terns, which they believed to represent 95% of the U.S. population and perhaps ...
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.