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      Integrating ecosystem engineering and food webs

      , , , , , ,
      Oikos
      Wiley-Blackwell

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          Ecological networks and their fragility.

          Darwin used the metaphor of a 'tangled bank' to describe the complex interactions between species. Those interactions are varied: they can be antagonistic ones involving predation, herbivory and parasitism, or mutualistic ones, such as those involving the pollination of flowers by insects. Moreover, the metaphor hints that the interactions may be complex to the point of being impossible to understand. All interactions can be visualized as ecological networks, in which species are linked together, either directly or indirectly through intermediate species. Ecological networks, although complex, have well defined patterns that both illuminate the ecological mechanisms underlying them and promise a better understanding of the relationship between complexity and ecological stability.
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            Paradox of enrichment: destabilization of exploitation ecosystems in ecological time.

            Six reasonable models of trophic exploitation in a two-species ecosystem whose exploiters compete only by depleting each other's resource supply are presented. In each case, increasing the supply of limiting nutrients or energy tends to destroy the steady state. Thus man must be very careful in attempting to enrich an ecosystem in order to increase its food yield. There is a real chance that such activity may result in decimation of the food species that are wanted in greater abundance.
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              Trophic cascades revealed in diverse ecosystems

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                Author and article information

                Journal
                Oikos
                Oikos
                Wiley-Blackwell
                00301299
                May 2014
                May 2014
                : 123
                : 5
                : 513-524
                Article
                10.1111/j.1600-0706.2013.01011.x
                f8f45563-25cd-4242-902b-1226a9f4c541
                © 2014

                http://doi.wiley.com/10.1002/tdm_license_1.1

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