By Bertie Josephson Weddell
Retaining residing normal assets is an introductory textbook for college students of conservation biology and source administration. It provides the old and conceptual contexts of 3 seminal techniques to the administration of residing usual assets: utilitarian administration for harvest of featured species and keep watch over of undesirable species, safety and recovery of populations and habitats to keep up biodiversity, and administration of complicated ecosystems to maintain either productiveness and biodiversity. instead of endorsing a unmarried strategy because the purely right one, this e-book investigates the historic and philosophical contexts, conceptual frameworks, vital options, and the constraints of every strategy.
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Extra resources for Conserving Living Natural Resources: In the Context of a Changing World
Is the author unusually biased? Does the author have a strong interest in advocating a particular measure or in defending a certain school of thought? Is the author associated with a group that is defending or attacking a particular position? If the evidence comes from historical documents, what was the perspective of the author? What interests and biases might have colored the information that was recorded? Where is this evidence presented? Is it in a professional journal? If not, is it in a publication that is trying to push a particular viewpoint or perhaps to sensationalize news?
Sea otters were killed for their pelts, and elephant seals for their oil (Carroll 1982). We shall see in Chapter 8 that the genetic consequences of that population reduction remain to this day. The process of intensive commercial exploitation followed by depletion is clearly illustrated by the fate of the northern fur seal. 2).
European colonization of many other parts of the world led to similar changes in land tenure. Communally owned resources were often converted to privately owned, marketable land (Browning 1971; Grove 1990; Gadgil and Guha 1992, 1995). Dramatic and widespread changes in levels of resource exploitation were associated with this change, and as a result many habitats were altered and populations of numerous species declined. In Australia, changes in land use after European convicts arrived in the nineteenth century converted the native semiarid vegetation to pioneer grass and later to pine scrub, habitats that were less favorable to native mammals than the original native plant communities.