نتایج جستجو برای: overexploitation

تعداد نتایج: 943  

Journal: :Journal of Biodiversity & Endangered Species 2015

2001
C. Béné L. Doyen D. Gabay

This paper presents a simple dynamic model dealing with the management of a marine renewable resource. But instead of studying the ecological and economic interactions in terms of equilibrium or optimal control, we pay much attention to the viability of the system or, in a symmetric way, to crisis situations. These viability/crisis situations are defined by a set of economic and biological stat...

2009
Anastasios Xepapadeas

Ecological economics studies the interactions and coevolution in time and space between ecosystems and human economies. The rate at which humans exploit or harvest ecosystems services exceeds what might be regarded as a desirable level from society’s point of view. The consequences of this overexploitation are well known (e.g., climate change, biodiversity loss and extinction of species, collap...

Journal: :Trends in ecology & evolution 2008
Barry W Brook Navjot S Sodhi Corey J A Bradshaw

If habitat destruction or overexploitation of populations is severe, species loss can occur directly and abruptly. Yet the final descent to extinction is often driven by synergistic processes (amplifying feedbacks) that can be disconnected from the original cause of decline. We review recent observational, experimental and meta-analytic work which together show that owing to interacting and sel...

2009
Inamul Haque Rajib Bandopadhyay

Commiphora wightii is an endangered, endemic species found in the Thar Desert of Rajasthan, India and adjoining areas of Pakistan. The populations of this plant are rapidly dwindling due to overexploitation for their medicinally important resin. Analysis of nucleotide sequences of the internal transcribed spacer of rDNAs revealed low genetic diversity ( = 0.03905; w = 0.05418) and high popula...

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