Sustaining Terrestrial Biodiversity: The Ecosystem Approach
... 2. Global deforestation is occurring by at least 0.2–0.5% per year, with most losses taking place in developing countries. 3. If conditions don’t change within the next 10–20 years, 40% of the world’s remaining forests will have been logged or converted to other uses. CASE STUDY: Forests cover about ...
... 2. Global deforestation is occurring by at least 0.2–0.5% per year, with most losses taking place in developing countries. 3. If conditions don’t change within the next 10–20 years, 40% of the world’s remaining forests will have been logged or converted to other uses. CASE STUDY: Forests cover about ...
FOUR (4) FACTORS AFFECTING DENSITY • IMMIGRATION
... • CLOSED: NOT CHANGE SIZE DURING SAMPLE PERIOD • OPEN: CHANGES IN SIZE DURING SAMPLE PERIOD • NOTE: REAL POPULATIONS ARE OPEN ...
... • CLOSED: NOT CHANGE SIZE DURING SAMPLE PERIOD • OPEN: CHANGES IN SIZE DURING SAMPLE PERIOD • NOTE: REAL POPULATIONS ARE OPEN ...
The ecological importance of lions (Panthera leo)
... The predator-prey equilibrium of any terrestrial ecosystem is dependent upon both ‘bottom-up’ (food resources) and ‘top-down’ (predation, parasites and disease) processes [1]. All trophic levels within an ecosystem are susceptible to trophic cascades by both direct and indirect impacts of apex pred ...
... The predator-prey equilibrium of any terrestrial ecosystem is dependent upon both ‘bottom-up’ (food resources) and ‘top-down’ (predation, parasites and disease) processes [1]. All trophic levels within an ecosystem are susceptible to trophic cascades by both direct and indirect impacts of apex pred ...
gations included ecological and biological
... the effects of the environment and of varying rates of exploitation. Since 1949, a major portion of the effort has been concerned with studies of the effects of predation by the sea lamprey, Petromyzon mari?ius, on fishes in Lakes Superior, Huron, and Michigan; the development of methods for its con ...
... the effects of the environment and of varying rates of exploitation. Since 1949, a major portion of the effort has been concerned with studies of the effects of predation by the sea lamprey, Petromyzon mari?ius, on fishes in Lakes Superior, Huron, and Michigan; the development of methods for its con ...
sea urchins - Waitt Institute
... The population of long-spined sea urchin, Diadema antillarum, declined drastically in the 1980s. This event significantly affected the amount of healthy coral reef cover, a trend that has continued to present day. ...
... The population of long-spined sea urchin, Diadema antillarum, declined drastically in the 1980s. This event significantly affected the amount of healthy coral reef cover, a trend that has continued to present day. ...
Chapter 5 - Angelfire
... Core Case Study: Endangered Southern Sea Otter (2) • 1938-2008: increase from 50 to ~2760 • 1977: declared an endangered species • Why should we care? 1. Cute and cuddly – tourists love them 2. Ethics – it’s wrong to hunt a species to extinction 3. Keystone species – eat other species that would de ...
... Core Case Study: Endangered Southern Sea Otter (2) • 1938-2008: increase from 50 to ~2760 • 1977: declared an endangered species • Why should we care? 1. Cute and cuddly – tourists love them 2. Ethics – it’s wrong to hunt a species to extinction 3. Keystone species – eat other species that would de ...
Romance is in the water at ZSL London Zoo
... Both of the freshwater species face extinction in the wild as their natural habitats are becoming increasingly threatened by pollution and drainage of waterways to accommodate for expanding human communities. They also face threats of predation from introduced species such as the mosquitofish. ZSL L ...
... Both of the freshwater species face extinction in the wild as their natural habitats are becoming increasingly threatened by pollution and drainage of waterways to accommodate for expanding human communities. They also face threats of predation from introduced species such as the mosquitofish. ZSL L ...
Studies on endangered and rare non
... problematic undertaking—excepting for those with economic significance—owing to the fact that lack of availability of either sufficient biological and ecological data or long-term observations of the various species that would allow patterns to be defined. The latter two decades of the 20th century ...
... problematic undertaking—excepting for those with economic significance—owing to the fact that lack of availability of either sufficient biological and ecological data or long-term observations of the various species that would allow patterns to be defined. The latter two decades of the 20th century ...
Population size
... Prereproductive age: not mature enough to reproduce. Reproductive age: those capable of reproduction. Postreproductive age: those too old to reproduce. ...
... Prereproductive age: not mature enough to reproduce. Reproductive age: those capable of reproduction. Postreproductive age: those too old to reproduce. ...
Ecology
... Note effects of size and distance to nearest similar environment Note also that there are fewer barrier to movement in a fragmented landscape than for a oceanic island – Corridors exist on land – Join patches – Hedgerows, ditches, bridges ...
... Note effects of size and distance to nearest similar environment Note also that there are fewer barrier to movement in a fragmented landscape than for a oceanic island – Corridors exist on land – Join patches – Hedgerows, ditches, bridges ...
biodiversity conservation
... • It helps equitable sharing of benefits arising out of commercial utilization of biodiversity resources and knowledge of their uses. ...
... • It helps equitable sharing of benefits arising out of commercial utilization of biodiversity resources and knowledge of their uses. ...
New Lecture 7.6 short (Species Interactions I).docx
... rate– by making the medium more viscous (Luckinbill). 4. Spatial heterogeneity – Huffaker’s mite expts (see Rickleffs, p. 310 ff.) ...
... rate– by making the medium more viscous (Luckinbill). 4. Spatial heterogeneity – Huffaker’s mite expts (see Rickleffs, p. 310 ff.) ...
ecology practice test a
... d both hare and lynx populations are regulated mainly by abiotic factors. e the hare population is r-selected; the lynx population is K-selected. 18 . The current size of the human population is closest to (a) 2 billion (b) 4 billion (c) 6 billion (d) 7 billion (e) 9 billion 19 Which of the followin ...
... d both hare and lynx populations are regulated mainly by abiotic factors. e the hare population is r-selected; the lynx population is K-selected. 18 . The current size of the human population is closest to (a) 2 billion (b) 4 billion (c) 6 billion (d) 7 billion (e) 9 billion 19 Which of the followin ...
Ecological Succession
... Why do some species die out and/or are replaced by others? Because they are either no longer fit for the environment due to the changes that have occurred (i.e. they can not survive here anymore), or because they are out-competed by other species for the resources available (they could survive witho ...
... Why do some species die out and/or are replaced by others? Because they are either no longer fit for the environment due to the changes that have occurred (i.e. they can not survive here anymore), or because they are out-competed by other species for the resources available (they could survive witho ...
Effects on Marine Mammals and Sea Turtles
... • Range from filter feeders to suction feeding to carnivorous • Feed on a variety of prey (including humans!) • Can eat things that are larger than their mouth ...
... • Range from filter feeders to suction feeding to carnivorous • Feed on a variety of prey (including humans!) • Can eat things that are larger than their mouth ...
Oceanography Chapter 16: Marine Communities Community
... Combination of effects may prove lethal Ecology: study of the balance between physical and biological factors and how they relate to community success and longevity. Competition ¾ Can be between the same population or different ones ¾ Subtle changes in factors can swing favor to one organism over an ...
... Combination of effects may prove lethal Ecology: study of the balance between physical and biological factors and how they relate to community success and longevity. Competition ¾ Can be between the same population or different ones ¾ Subtle changes in factors can swing favor to one organism over an ...
LESSON Protecting Biodiversity
... promise to uphold the laws that are described. One important biodiversity treaty is the 1975 Convention on International Trade in Endangered Species of Wild Fauna and Flora (CITES). CITES protects endangered species by banning the international transport of their body parts. When enforced by the 175 ...
... promise to uphold the laws that are described. One important biodiversity treaty is the 1975 Convention on International Trade in Endangered Species of Wild Fauna and Flora (CITES). CITES protects endangered species by banning the international transport of their body parts. When enforced by the 175 ...
Swedish Fish Populations – Challenges for the Future
... which is one of the most important physical factors for organisms in the Baltic Sea. Higher temperatures in the Baltic can have numerous biological effects. All species are not directly affected by a rise in temperature, but may be indirectly affected when other species are favourably or unfavourabl ...
... which is one of the most important physical factors for organisms in the Baltic Sea. Higher temperatures in the Baltic can have numerous biological effects. All species are not directly affected by a rise in temperature, but may be indirectly affected when other species are favourably or unfavourabl ...
Threatened Species Art Competition Teacher
... Australia is home to many unique habitats and wildlife. Since European settlement more than 100 species of plants and animals have become extinct. More mammals have become extinct in Australia than any other country. Habitat destruction is the main reason for a species to become threatened or extinc ...
... Australia is home to many unique habitats and wildlife. Since European settlement more than 100 species of plants and animals have become extinct. More mammals have become extinct in Australia than any other country. Habitat destruction is the main reason for a species to become threatened or extinc ...
SAP4 - Barnsley Biodiversity Trust
... are opportunistic hunters that will take a wide range of prey, but mainly feed on fish. The Otter is a top predator in the river ecosystem and, as such, it occurs at a naturally low density. A male Otter may use up to 40km of watercourse. This would include main rivers as well as smaller tributaries ...
... are opportunistic hunters that will take a wide range of prey, but mainly feed on fish. The Otter is a top predator in the river ecosystem and, as such, it occurs at a naturally low density. A male Otter may use up to 40km of watercourse. This would include main rivers as well as smaller tributaries ...
Marine Ecology 2009 final lecture 4 Competition
... • Niche - the role of a species in a community, defined in practice by measuring all possible resources used and tolerance limits • Niche Breadth - The amount of a resource used by an organism; this amount may change when new species are introduced or removed from a community ...
... • Niche - the role of a species in a community, defined in practice by measuring all possible resources used and tolerance limits • Niche Breadth - The amount of a resource used by an organism; this amount may change when new species are introduced or removed from a community ...
Testimony to Congressional Oceans Commission, Anchorage August 22, 2002
... a staggering 750 million pounds of dead ocean wildlife, more than was kept by the entire New England fishing fleet that year. Of particular concern are the world’s many endangered animals that are caught as Bycatch. For example, the International Whaling Commission estimates that between 65,000 and ...
... a staggering 750 million pounds of dead ocean wildlife, more than was kept by the entire New England fishing fleet that year. Of particular concern are the world’s many endangered animals that are caught as Bycatch. For example, the International Whaling Commission estimates that between 65,000 and ...
File
... the biota (SO42-), in the soil (SO42- or H2S or S). Know the forms of phosphate in the Phosphate cycle – PO43- found in water & soil ONLY (not found in the atmosphere). Sources of Carbon (fossil fuels, living things (biota – mostly trees); Sink for Carbon (atmosphere, oceans) Explain the parts ...
... the biota (SO42-), in the soil (SO42- or H2S or S). Know the forms of phosphate in the Phosphate cycle – PO43- found in water & soil ONLY (not found in the atmosphere). Sources of Carbon (fossil fuels, living things (biota – mostly trees); Sink for Carbon (atmosphere, oceans) Explain the parts ...
Overexploitation
Overexploitation, also called overharvesting, refers to harvesting a renewable resource to the point of diminishing returns. Sustained overexploitation can lead to the destruction of the resource. The term applies to natural resources such as: wild medicinal plants, grazing pastures, game animals, fish stocks, forests, and water aquifers.In ecology, overexploitation describes one of the five main activities threatening global biodiversity. Ecologists use the term to describe populations that are harvested at a rate that is unsustainable, given their natural rates of mortality and capacities for reproduction. This can result in extinction at the population level and even extinction of whole species. In conservation biology the term is usually used in the context of human economic activity that involves the taking of biological resources, or organisms, in larger numbers than their populations can withstand. The term is also used and defined somewhat differently in fisheries, hydrology and natural resource management.Overexploitation can lead to resource destruction, including extinctions. However it is also possible for overexploitation to be sustainable, as discussed below in the section on fisheries. In the context of fishing, the term overfishing can be used instead of overexploitation, as can overgrazing in stock management, overlogging in forest management, overdrafting in aquifer management, and endangered species in species monitoring. Overexploitation is not an activity limited to humans. Introduced predators and herbivores, for example, can overexploit native flora and fauna.