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Biodiversity_F06
Biodiversity_F06

... • The relationship between number of species and area of habitat is S = c A z • the rate of loss of tropical forest from satellite imagery is 1-2% annually • the resulting loss rate of species results in an overall loss of 25 - 50% of the world’s species by 2100 • Assuming tropical forests harbor 10 ...
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... commented that this crisis will result in the loss of large numbers of species, possibly 25–50%, within the lifetime of students reading this book. However, surprisingly few biologists have recognized that in the longer term these extinctions will impoverish evolution’s course for several million ye ...
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Chapter 18 Highlights - Orting School District

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Relating Foraging Behavior to Wildlife Management
Relating Foraging Behavior to Wildlife Management

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CTA-041-Mass Extinction-Earth - The World Federation for Coral
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... sixth mass extinction, therefore, is beginning. They estimate that it would grow to rival the last great catastrophe of the past, when the dinosaurs and much else died out 65m years ago, in as little as three human lifetimes. Once more, this is a conservative estimate. It simply considers the kill m ...
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Extinction debt

In ecology, extinction debt is the future extinction of species due to events in the past. Extinction debt occurs because of time delays between impacts on a species, such as destruction of habitat, and the species' ultimate disappearance. For instance, long-lived trees may survive for many years even after reproduction of new trees has become impossible, and thus they may be committed to extinction. Technically, extinction debt generally refers to the number of species in an area likely to go extinct, rather than the prospects of any one species, but colloquially it refers to any occurrence of delayed extinction.In discussions of threats to biodiversity, extinction debt is analogous to the ""climate commitment"" in climate change, which states that inertia will cause the earth to continue to warm for centuries even if no more greenhouse gasses are emitted. Similarly, the current extinction may continue long after human impacts on species halt.Extinction debt may be local or global, but most examples are local as these are easier to observe and model. It is most likely to be found in long-lived species and species with very specific habitat requirements (specialists). Extinction debt has important implications for conservation, as it implies that species may go extinct due to past habitat destruction, even if continued impacts cease, and that current reserves may not be sufficient to maintain the species that occupy them. Interventions such as habitat restoration may reverse extinction debt.Immigration credit is the corollary to extinction debt. It refers to the number of species likely to immigrate to an area after an event such as the restoration of an ecosystem.
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