Environmental Studies

Conserving Living Natural Resources: In the Context of a by Bertie Josephson Weddell

By Bertie Josephson Weddell

Retaining dwelling common assets is an introductory textbook for college students of conservation biology and source administration. It offers the old and conceptual contexts of 3 seminal ways to the administration of dwelling traditional assets: utilitarian administration for harvest of featured species and keep an eye on of undesirable species, safety and recovery of populations and habitats to take care of biodiversity, and administration of complicated ecosystems to maintain either productiveness and biodiversity. instead of endorsing a unmarried technique because the purely right one, this e-book investigates the ancient and philosophical contexts, conceptual frameworks, crucial recommendations, and the restrictions of every strategy.

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Correlation (the association of variables with each other) does not equal causation. Comparative studies can identify certain factors that occur together in time, and statistical techniques can be used to evaluate the significance of these associations (that is, the likelihood that they are due solely to chance), but this does not prove a causal relationship between them. There may be other factors that changed at the same time and that actually caused the effects we are interested in. ) As in the case of the ozone example, ecologists often look to the past to get information that will help them understand the present or plan for the future.

Models are particularly useful where the risks of doing experimental studies are unacceptable, as in the case of research on rare organisms. Field studies Evaluating evidence with a critical eye 23 inevitably involve a degree of disturbance to wild populations, while laboratory experiments require the removal of some individuals from the wild. Both these outcomes should be avoided when dealing with highly sensitive populations. Models are one way to avoid these negative impacts. Sometimes the urgency of a situation is used as a justification for basing management decisions on models rather than data, however.

Models are used a great deal in the management of natural resources. In cases where we want to predict what effects a proposed policy will have on habitats or populations, models are extremely useful. If we introduce six wolves into an area of suitable habitat, what size will the wolf population attain in 20 years? How long will the world’s tropical forests last if we continue clearing them at current rates? What will the average summer temperature be in London in AD 2050 if we continue producing greenhouse gases at current rates?

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