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      Stable isotopes in mammalian research: a beginner's guide

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      Journal of Mammalogy
      American Society of Mammalogists (ASM)

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          Fishing down marine food webs

          The mean trophic level of the species groups reported in Food and Agricultural Organization global fisheries statistics declined from 1950 to 1994. This reflects a gradual transition in landings from long-lived, high trophic level, piscivorous bottom fish toward short-lived, low trophic level invertebrates and planktivorous pelagic fish. This effect, also found to be occurring in inland fisheries, is most pronounced in the Northern Hemisphere. Fishing down food webs (that is, at lower trophic levels) leads at first to increasing catches, then to a phase transition associated with stagnating or declining catches. These results indicate that present exploitation patterns are unsustainable.
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            Stable Isotopes in Plant Ecology

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              Isotopic ecology ten years after a call for more laboratory experiments.

              About 10 years ago, reviews of the use of stable isotopes in animal ecology predicted explosive growth in this field and called for laboratory experiments to provide a mechanistic foundation to this growth. They identified four major areas of inquiry: (1) the dynamics of isotopic incorporation, (2) mixing models, (3) the problem of routing, and (4) trophic discrimination factors. Because these areas remain central to isotopic ecology, we use them as organising foci to review the experimental results that isotopic ecologists have collected in the intervening 10 years since the call for laboratory experiments. We also review the models that have been built to explain and organise experimental results in these areas.
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                Author and article information

                Journal
                Journal of Mammalogy
                J Mammal
                American Society of Mammalogists (ASM)
                0022-2372
                1545-1542
                April 30 2012
                April 30 2012
                : 93
                : 2
                : 312-328
                Article
                10.1644/11-MAMM-S-166.1
                4e6594ba-6edb-4066-9d7c-190c2d27ba2e
                © 2012
                History

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