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"service-account-enrichment"; a . pav:importedBy ; "http://rohub.org/performedtask/c8b0c47adc91347dabce5f6d8555b07a"; ; ; "7961"^^xsd:integer; "https://api.rohub.org/api/ros/c5a306a2-98e1-42f3-a917-7cf7bbd54b2c/crate/download/"; ; "http://rohub.org/ext/feb7b4f72d9e3bdfaa4307aa569da0fb"; ; "2018-06-20 11:22:05.046000+00:00"; "2025-03-05 00:55:19.220201+00:00"; "2018-06-20 11:22:05.046000+00:00"; "Proposed indicators for the Marine Strategy Framework Directive (MSFD) food webs Descriptor focus on structural elements of food webs, and in particular on the abundance and productivity of top predators. However, the inferences that can be drawn from such indicators depend on whether or not the predators are \"bottom-up limited\" by the availability of their prey. Many seabird populations appear to be \"bottom-up limited\" so that variation in their reproductive success and/or abundance reflects changes in lower trophic levels. 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