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Introduction: - Library - Conservation International
... Marine corridors should not be gauged a success unless population numbers of migratory utilizing species are stable or increasing (Edgar & Garske, 2005) Species level indicator that directly measures population trends of regionally specific wide-ranging species at life history bottlenecks ...
... Marine corridors should not be gauged a success unless population numbers of migratory utilizing species are stable or increasing (Edgar & Garske, 2005) Species level indicator that directly measures population trends of regionally specific wide-ranging species at life history bottlenecks ...
What is ecosystem stability?
... 3. Predict Sea otters, a keystone species, eat sea urchins, which in turn eat kelp. In the 1990s, sea otter populations off the coast of Alaska declined because orcas ate large numbers of otters. What effect did this have on the sea otters’ ecosystem? ...
... 3. Predict Sea otters, a keystone species, eat sea urchins, which in turn eat kelp. In the 1990s, sea otter populations off the coast of Alaska declined because orcas ate large numbers of otters. What effect did this have on the sea otters’ ecosystem? ...
Freshwater Fish Richness
... population, or group of populations, that is substantially reproductively isolated and represents an important component in the evolutionary legacy of the species. Populations/ESUs of only a few species in Ontario identified, none comprehensively. ...
... population, or group of populations, that is substantially reproductively isolated and represents an important component in the evolutionary legacy of the species. Populations/ESUs of only a few species in Ontario identified, none comprehensively. ...
How does global change affect the strength of trophic interactions?
... however, report differing patterns determined by species body size, for example Sala and Graham (2002) working with eight marine herbivores reported a bimodal distribution of interaction strengths that was well explained by the body size of each consumer. Using a non-linear modelling approach McCann ...
... however, report differing patterns determined by species body size, for example Sala and Graham (2002) working with eight marine herbivores reported a bimodal distribution of interaction strengths that was well explained by the body size of each consumer. Using a non-linear modelling approach McCann ...
Chapter 50 Conservation Biology
... – Biodiversity brought about by evolutionary change has value in and of itself. Mader: Biology 8th Ed. ...
... – Biodiversity brought about by evolutionary change has value in and of itself. Mader: Biology 8th Ed. ...
Intertidal Mudflats
... Mudflats are sedimentary intertidal habitats created by deposition in low energy coastal environments, particularly estuaries and other sheltered areas. Their sediment consists mostly of silts and clays with a high organic content. Towards the mouths of estuaries where salinity and wave energy are h ...
... Mudflats are sedimentary intertidal habitats created by deposition in low energy coastal environments, particularly estuaries and other sheltered areas. Their sediment consists mostly of silts and clays with a high organic content. Towards the mouths of estuaries where salinity and wave energy are h ...
Qualitative Insight Into Public Knowledge of, and
... National Recreation Area to the southeast, and Bryce Canyon National Park to the northwest. As for threats to the region’s biodiversity, the population of the Intermountain West continues to experience tremendous growth. Utah, in particular, has one of fastest growing populations in the nation. Sinc ...
... National Recreation Area to the southeast, and Bryce Canyon National Park to the northwest. As for threats to the region’s biodiversity, the population of the Intermountain West continues to experience tremendous growth. Utah, in particular, has one of fastest growing populations in the nation. Sinc ...
Relationships Among Living Things A. Organizing Ecosystems
... Click on this icon to return to the table of contents Click on this icon to return to the previous slide Click on this icon to move to the next slide Click on this icon to open the resources file. Click on this icon to go to the end of the presentation. ...
... Click on this icon to return to the table of contents Click on this icon to return to the previous slide Click on this icon to move to the next slide Click on this icon to open the resources file. Click on this icon to go to the end of the presentation. ...
Large Copper Action Plan
... National Park and the univoltine sub species is now considered highly endangered in a world context (Wynhoff & van Swaay, 1995). ...
... National Park and the univoltine sub species is now considered highly endangered in a world context (Wynhoff & van Swaay, 1995). ...
Amphibians` response to the lunar synodic cycle
... Other examples of lunar adapted behaviors also show a diversity of response to the lunar cycle. Activity (number of frogs encountered per night) of several frogs of the genus Litoria is significantly greater on illuminated nights, possibly as an adaptation to predation by snakes. Snakes are a partia ...
... Other examples of lunar adapted behaviors also show a diversity of response to the lunar cycle. Activity (number of frogs encountered per night) of several frogs of the genus Litoria is significantly greater on illuminated nights, possibly as an adaptation to predation by snakes. Snakes are a partia ...
Some Principles of Conservation Biology, as They Apply
... biology must involve not only biologists, but also geographers, sociologists, economists, philosophers, lawyers, political scientists, educators, artists, and other professionals. A distinguishing feature of conservation biology is that it is mission oriented. 4 Underlying any mission is a set of va ...
... biology must involve not only biologists, but also geographers, sociologists, economists, philosophers, lawyers, political scientists, educators, artists, and other professionals. A distinguishing feature of conservation biology is that it is mission oriented. 4 Underlying any mission is a set of va ...
File - Oxford Megafauna conference
... may have had on atmospheric gas exchange and perhaps even climate. Here, using allometric relationships between body mass and density, methane production and geographic range, we calculate the annual decrease in the methane source pool resulting from the extinction of 114 large-bodied herbivorous sp ...
... may have had on atmospheric gas exchange and perhaps even climate. Here, using allometric relationships between body mass and density, methane production and geographic range, we calculate the annual decrease in the methane source pool resulting from the extinction of 114 large-bodied herbivorous sp ...
Key Biodiversity Areas: review and lessons learned
... Necessarily protected areas, although many are, and many more should be The “only” scale at which biodiversity conservation is urgent – they must often be complemented by targeting species specific (e.g., invasive species control) and sea/landscape scale (e.g., biodiversity conservation corridor ...
... Necessarily protected areas, although many are, and many more should be The “only” scale at which biodiversity conservation is urgent – they must often be complemented by targeting species specific (e.g., invasive species control) and sea/landscape scale (e.g., biodiversity conservation corridor ...
megafauna extinction - Harvard Computer Society
... survived after those on the continent, until humans arrived on the island. For example, there is a distinct difference in the dates of sloth extinctions between North America, South America and the West Indies. In the West Indies, humans did not arrive until the middle of the Holocene era, well afte ...
... survived after those on the continent, until humans arrived on the island. For example, there is a distinct difference in the dates of sloth extinctions between North America, South America and the West Indies. In the West Indies, humans did not arrive until the middle of the Holocene era, well afte ...
Effects of captivity on response to a novel environment in the oldfield mouse (
... had been cut and the debris burned within the last four years. This management practice was designed to simulate the forest's fire cycles. The four populations of P. p. subgriseus used in this study were: (1) GR35, which was founded in 1952 and was 35 generations removed from the wild (N = 30); (2) ...
... had been cut and the debris burned within the last four years. This management practice was designed to simulate the forest's fire cycles. The four populations of P. p. subgriseus used in this study were: (1) GR35, which was founded in 1952 and was 35 generations removed from the wild (N = 30); (2) ...
Perspectives on the Derivation of Aquatic Life Criteria for Pesticides
... • The 3-year return frequency in the 1985 guidelines was based on observed recovery times of fish populations. • Most aquatic invertebrate species have much shorter recovery times. Populations of crustaceans and many insect species recover from effects of pesticides within days or weeks, as observ ...
... • The 3-year return frequency in the 1985 guidelines was based on observed recovery times of fish populations. • Most aquatic invertebrate species have much shorter recovery times. Populations of crustaceans and many insect species recover from effects of pesticides within days or weeks, as observ ...
Are invasive species a major cause of extinctions?
... to prevent the extinction of endemic natives, or is it largely a waste of managers’ time and effort? Multiple threats can also act synergistically to cause declines or extinctions. However, if invasives are not a primary cause of extinction or major contributors to declines of species (locally or gl ...
... to prevent the extinction of endemic natives, or is it largely a waste of managers’ time and effort? Multiple threats can also act synergistically to cause declines or extinctions. However, if invasives are not a primary cause of extinction or major contributors to declines of species (locally or gl ...
Paull and Johnson 2014 climate dz
... 50 field-collected H. trivolvis snails to each mesocosm, followed 1 and 2 weeks later by additions of embryonated R. ondatrae eggs (~ 14 000 and 28 000 total in the low- and high-exposure dose treatments, respectively) or sham material (unexposed treatment; see Appendix S1). We chose a density of sn ...
... 50 field-collected H. trivolvis snails to each mesocosm, followed 1 and 2 weeks later by additions of embryonated R. ondatrae eggs (~ 14 000 and 28 000 total in the low- and high-exposure dose treatments, respectively) or sham material (unexposed treatment; see Appendix S1). We chose a density of sn ...
... depletion of available foods, cover, and suitable mates for resident bobwhites. There are many factors contributing to the overall decline of the bobwhite population, but there are some key management techniques that private landowners can implement to help this upland game bird survive. Broadcastin ...
Why Alien Invaders Succeed: Support for the Escape-from
... (Baker 1965; Noble 1989; Blossey 1993; but see Thébaud and Simberloff 2001). The most commonly invoked explanation for this phenomenon is that natural enemies (e.g., competitors, predators, and pathogens) that are present in the native range do not follow the migrating species and are thus absent f ...
... (Baker 1965; Noble 1989; Blossey 1993; but see Thébaud and Simberloff 2001). The most commonly invoked explanation for this phenomenon is that natural enemies (e.g., competitors, predators, and pathogens) that are present in the native range do not follow the migrating species and are thus absent f ...
Bioaccumulation
... Since the 1980s the world amphibian population has declined and there has been an increase in birth deformities. This may be due to: drought, increased UV rays, pollution, habitat loss, parasites and diseases. Amphibians, like this frog, have exhibited drastic changes since the 1980s. ...
... Since the 1980s the world amphibian population has declined and there has been an increase in birth deformities. This may be due to: drought, increased UV rays, pollution, habitat loss, parasites and diseases. Amphibians, like this frog, have exhibited drastic changes since the 1980s. ...
Invasive Bullfrog Population Explosion
... long, were recently discovered in the creek. They are present from Pacheco Avenue in Fairfax all the way down to the Ross fish ladder, the first pool above tidewater. Judging by their size, they were born in the spring of 2009 and will metamorphose into frogs in the coming months. The sudden ubiquit ...
... long, were recently discovered in the creek. They are present from Pacheco Avenue in Fairfax all the way down to the Ross fish ladder, the first pool above tidewater. Judging by their size, they were born in the spring of 2009 and will metamorphose into frogs in the coming months. The sudden ubiquit ...
Lesson Overview
... These limiting factors kept human death rates very high. Until fairly recently, only half the children in the world survived to adulthood. Because death rates were so high, families had many children, just to make sure that some would survive. ...
... These limiting factors kept human death rates very high. Until fairly recently, only half the children in the world survived to adulthood. Because death rates were so high, families had many children, just to make sure that some would survive. ...
Interactions Between Populations
... • Traditional approaches to population interactions have been to consider just the direct pairwise interactions • This is simplistic in that the population either interact, or they do not ...
... • Traditional approaches to population interactions have been to consider just the direct pairwise interactions • This is simplistic in that the population either interact, or they do not ...
Decline in amphibian populations
![](https://en.wikipedia.org/wiki/Special:FilePath/Bufo_periglenes2.jpg?width=300)
Since the 1980s, declines in amphibian populations, including population crashes and mass localized extinctions, have been noted from locations all over the world. These declines are perceived as one of the most critical threats to global biodiversity, and several causes are believed to be involved, including disease, habitat destruction and modification, exploitation, pollution, pesticide use, introduced species, and ultraviolet-B radiation (UV-B). However, many of the causes of amphibian declines are still poorly understood, and the topic is currently a subject of much ongoing research. Calculations based on extinction rates suggest that the current extinction rate of amphibians could be 211 times greater than the background extinction rate and the estimate goes up to 25,000–45,000 times if endangered species are also included in the computation.