1991, pp 99-130;  Tags: ecosystem,interspecies interactions,information flows,vegetation,pollutants,  anthropogenic, pollution, environment, protection,trophic chains,primary production,

http://5bio5.blogspot.ru/2014/04/problems-at-ecosystem-level-chapter-in.html

http://link.springer.com/chapter/10.1007%2F978-3-642-75376-3_6 

Problems at the Ecosystem Level,

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    Abstract

    To analyze conservation problems at the ecosystem level it is necessary to investigate inter alia problems of changes in their structure, disturbances of interspecies interactions, breakage of information flows, wreckage of vegetation cover in toto, transfer of pollutants by migrants and through trophic chains, and decrease of primary production.