Current Extinction Rates Versus Mass Extinction Events Current
... 2007). Finally, functional group extinctions will not start occurring until a good portion of the species within have gone extinct (Fonseca 2001). So even though we are not currently in a mass extinction event, it seems like our effect on the planet is certainly gearing us up to experience one a lot ...
... 2007). Finally, functional group extinctions will not start occurring until a good portion of the species within have gone extinct (Fonseca 2001). So even though we are not currently in a mass extinction event, it seems like our effect on the planet is certainly gearing us up to experience one a lot ...
Patterns of plants species diversity following local extinction of the
... allowed us to examine temporal trends in species richness while controlling for effects of annual rainfall within a repeated measures design (Branch et al., 1996). Trends in species richness with time since extinction of vizcachas and with rainfall were examined by adding these two variables to the ...
... allowed us to examine temporal trends in species richness while controlling for effects of annual rainfall within a repeated measures design (Branch et al., 1996). Trends in species richness with time since extinction of vizcachas and with rainfall were examined by adding these two variables to the ...
Influences of the El Niño/Southern Oscillation and the North Atlantic
... boundaries of the station and from the local landscape surrounding the station. This assumption is supported by an analysis of data from six stations located at Big Oaks National Wildlife Refuge, Indiana, that showed reproductive indices for four forest-interior species increased as a function of me ...
... boundaries of the station and from the local landscape surrounding the station. This assumption is supported by an analysis of data from six stations located at Big Oaks National Wildlife Refuge, Indiana, that showed reproductive indices for four forest-interior species increased as a function of me ...
Some case studies of Acacia as weeds and implications for herbaria
... were determined by B. Maslin (Perth Herbarium) to be A. cyclops. Deliberate planting for coastal dune stabilisation is a strong possibility for the initial introduction of A. cyclops to the area. Acacia cyclops has been used to stabilise coastal sand dunes overseas (Orchard & Wilson 2001b), most not ...
... were determined by B. Maslin (Perth Herbarium) to be A. cyclops. Deliberate planting for coastal dune stabilisation is a strong possibility for the initial introduction of A. cyclops to the area. Acacia cyclops has been used to stabilise coastal sand dunes overseas (Orchard & Wilson 2001b), most not ...
Subsidized predators, landscapes of fear and disarticulated
... foxes are limited by still larger carnivores (e.g. in the Middle East, see Scheinin et al., 2006), and this often occurs despite a relatively low degree of dietary overlap between the larger and smaller predators. Therefore, a decline in the smaller, subsidized carnivore population due to the presen ...
... foxes are limited by still larger carnivores (e.g. in the Middle East, see Scheinin et al., 2006), and this often occurs despite a relatively low degree of dietary overlap between the larger and smaller predators. Therefore, a decline in the smaller, subsidized carnivore population due to the presen ...
Year-to-year variation in plant competition in a mountain grassland
... 1 We used a series of removal experiments to examine how species response to competition and climatic differences varied in three different years. We tested the interaction between removal of the dominant grass species, Festuca rubra, and year-to-year environmental variation in a mown mountain grass ...
... 1 We used a series of removal experiments to examine how species response to competition and climatic differences varied in three different years. We tested the interaction between removal of the dominant grass species, Festuca rubra, and year-to-year environmental variation in a mown mountain grass ...
Killing of wild animals - Scottish Wildlife Trust
... the most humane and most effective method available to carry out the killing of animals already determined as part of Reserve management. In this context by definition this would constitute culling, with the field sport element merely incidental. 18. Where an arrangement for field sports already exi ...
... the most humane and most effective method available to carry out the killing of animals already determined as part of Reserve management. In this context by definition this would constitute culling, with the field sport element merely incidental. 18. Where an arrangement for field sports already exi ...
Biotic factors are the other living things in an ecosystem that affect
... Biotic factors are the other living things in an ecosystem that affect the survival of an organism in that ecosystem. They include: competition for food and water competition for shelter availability of food - plants and animals number of predators co-operation to help find food ...
... Biotic factors are the other living things in an ecosystem that affect the survival of an organism in that ecosystem. They include: competition for food and water competition for shelter availability of food - plants and animals number of predators co-operation to help find food ...
pdf
... Appendix A: Example of AIS Fact Sheets: Asian Carp, p. 1-2 only The following text from the Asian carp (Hypopthalmichthys spp.) fact sheet at NYIS.info. Ecological Risks and Impacts of Asian Carp Silver and bighead carp are filter-feeders which feed on plankton (drifting animal, plant, or bacteria o ...
... Appendix A: Example of AIS Fact Sheets: Asian Carp, p. 1-2 only The following text from the Asian carp (Hypopthalmichthys spp.) fact sheet at NYIS.info. Ecological Risks and Impacts of Asian Carp Silver and bighead carp are filter-feeders which feed on plankton (drifting animal, plant, or bacteria o ...
The OOSTVAARDERSDPLASSEN
... But the Aurochs and the Tarpan are extinct. Suitable replacements were therefore sought among these species’ descendents. In the end, Heck Cattle and the Konik Horse were chosen, which have undergone very little selective breeding and which therefore might still have a lot of the same natural charac ...
... But the Aurochs and the Tarpan are extinct. Suitable replacements were therefore sought among these species’ descendents. In the end, Heck Cattle and the Konik Horse were chosen, which have undergone very little selective breeding and which therefore might still have a lot of the same natural charac ...
vegetation dynamics in the western himalayas, diversity indices and
... Vegetation provides the first tropic trophic level in mountain ecosystems and hence requires proper documentation and quantification in relation to abiotic environmental variables both at individual and aggregate levels. The complex and dynamic Himalayas with their varying climate and topography exh ...
... Vegetation provides the first tropic trophic level in mountain ecosystems and hence requires proper documentation and quantification in relation to abiotic environmental variables both at individual and aggregate levels. The complex and dynamic Himalayas with their varying climate and topography exh ...
042-14.4.04.01.20.20/03-2012 30.09.2009 ж. №2 басылым орнына
... 9. f you perceive the divine mystery in things, you will begin to comprehend the world better. 10. The polar bears would have nowhere to live if polar ice melted. 11. If I were you, I would never leave fire in the forest. 12. If we cared for habitats, we would save the planet’s wildlife. 13. If peop ...
... 9. f you perceive the divine mystery in things, you will begin to comprehend the world better. 10. The polar bears would have nowhere to live if polar ice melted. 11. If I were you, I would never leave fire in the forest. 12. If we cared for habitats, we would save the planet’s wildlife. 13. If peop ...
Species Name: - Fairchild Tropical Botanic Garden
... The number of populations suggests that this species may not be in imminent danger. The best management option would be to use best practices for the habitat Harrisia simpsonii occurs within. These management practices may be unknown, and should be accompanied by the experimental method to determine ...
... The number of populations suggests that this species may not be in imminent danger. The best management option would be to use best practices for the habitat Harrisia simpsonii occurs within. These management practices may be unknown, and should be accompanied by the experimental method to determine ...
Heterospecific courtship, minority effects and niche separation
... competitive exclusion is instead driven by genetic drift and non-resource related selection (reviewed in Gordon, 2000). This might especially apply to phytophagous insects that often experience much lower population densities than the density of their host plant resource (Lawton & Strong, 1981), whi ...
... competitive exclusion is instead driven by genetic drift and non-resource related selection (reviewed in Gordon, 2000). This might especially apply to phytophagous insects that often experience much lower population densities than the density of their host plant resource (Lawton & Strong, 1981), whi ...
Archeology, deep history, and the human transformation of island
... records provide important context for understanding modern environmental and sociopolitical developments on islands. We review and analyze human interactions with island ecosystems in Polynesia, the Caribbean, and California during the last several millennia. Our analysis demonstrates that human imp ...
... records provide important context for understanding modern environmental and sociopolitical developments on islands. We review and analyze human interactions with island ecosystems in Polynesia, the Caribbean, and California during the last several millennia. Our analysis demonstrates that human imp ...
Advantageous indirect interactions in systems of competition
... species are of exactly equal magnitude c. However, for s > 0; the interaction strengths are free to vary about c as mean. The variability of the coefficients is understood as an indicator of disturbance. Thus two systems may have the same number of species and the same average interaction strength c, ...
... species are of exactly equal magnitude c. However, for s > 0; the interaction strengths are free to vary about c as mean. The variability of the coefficients is understood as an indicator of disturbance. Thus two systems may have the same number of species and the same average interaction strength c, ...
bryophytes (musci) unexpectedly rare or absent in the azores
... the individual nine islands may in the near future support an invasion of these species to the archipelago, or at least, a spreading within the islands. Consequently such species as Hedwigia ciliata and Climacium dendroides may become new invaders and e.g. Funaria hygrometrica, and Pohlia nutans may ...
... the individual nine islands may in the near future support an invasion of these species to the archipelago, or at least, a spreading within the islands. Consequently such species as Hedwigia ciliata and Climacium dendroides may become new invaders and e.g. Funaria hygrometrica, and Pohlia nutans may ...
the spider fauna of the irrigated rice ecosystem in central kerala
... was conducted across different elevational ranges. Spiders were collected from rice fields of high ranges, midland and low land areas in two cropping seasons viz., June–September 2002 (Kanni Krishy) and October 2002–February 2003 (Makara Krishy) with a total of 144 hours of sampling time distributed ...
... was conducted across different elevational ranges. Spiders were collected from rice fields of high ranges, midland and low land areas in two cropping seasons viz., June–September 2002 (Kanni Krishy) and October 2002–February 2003 (Makara Krishy) with a total of 144 hours of sampling time distributed ...
99. Woodruff, D.S. The problems of conserving genes and species
... defined to include management systems and other means by which knowledge is appliedused to conserve species have been reviewed elsewhere (U.S. Congress, Office of Technology Assessment 1987) and are applicable at four different levels. First, many species are being managed where they occur naturally ...
... defined to include management systems and other means by which knowledge is appliedused to conserve species have been reviewed elsewhere (U.S. Congress, Office of Technology Assessment 1987) and are applicable at four different levels. First, many species are being managed where they occur naturally ...
Woodland caribou have been part of social, cultural and economic
... muzzles and tails are short and hairy. Ground and tree lichens are their primary winter food. Caribou breed in late fall, and a single calf is born between late May and early June. Calves are well developed at birth and are able to travel within a few hours. ...
... muzzles and tails are short and hairy. Ground and tree lichens are their primary winter food. Caribou breed in late fall, and a single calf is born between late May and early June. Calves are well developed at birth and are able to travel within a few hours. ...
Sitename:-Gondwana Rainforests of Australia Site Description:
... Justification :-Funding is largely the responsibility of the State management agencies. However, funding has been made available by the Australian Government to assist with additional management and presentation activities. The Australian Government has also funded the position of the Gondwana Rainf ...
... Justification :-Funding is largely the responsibility of the State management agencies. However, funding has been made available by the Australian Government to assist with additional management and presentation activities. The Australian Government has also funded the position of the Gondwana Rainf ...
Mississippi Valley Loess Ecoregion
... 74a. Crowley’s Ridge, the only portion of the Bluff Hills ecoregion in Arkansas, is a disjunct series of loess-capped hills surrounded by the lower, flatter Mississippi Alluvial Plain (73). Crowley’s Ridge, with elevations of up to 500 feet, is of sufficient height to have trapped windblown silt dur ...
... 74a. Crowley’s Ridge, the only portion of the Bluff Hills ecoregion in Arkansas, is a disjunct series of loess-capped hills surrounded by the lower, flatter Mississippi Alluvial Plain (73). Crowley’s Ridge, with elevations of up to 500 feet, is of sufficient height to have trapped windblown silt dur ...
2 components to Habitat Fragmentation
... • 150 million people in 132,000 sq. km • originally tropical forest, only 10% remains in reserves • Research project studied effects of habitat fragmentation on 10 raptor species (Thiollay and Meybury 1988) • Reserves had high densities of birds, numbers of species increased with size of reserve • u ...
... • 150 million people in 132,000 sq. km • originally tropical forest, only 10% remains in reserves • Research project studied effects of habitat fragmentation on 10 raptor species (Thiollay and Meybury 1988) • Reserves had high densities of birds, numbers of species increased with size of reserve • u ...
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.