Trophic structure of the pelagic ecosystems of the western and central Pacific Ocean
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چکیده
Trophic structure of the pelagic ecosystems of the western and central pacific ocean
منابع مشابه
Jimar – Pfrp Annual Report for Fy 2007
1. Purpose of the project: Previous modeling suggests that tuna productivity in the western and central Pacific Ocean is tied to upwelling along the equator in the central and eastern Pacific. This project proposes to test this hypothesis by combining diet analysis, stable isotopic analyses, and food-web modeling to study trophic-level variation and tuna movements in the equatorial Pacific. Our...
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Open-ocean ecosystems experienced profound disruptions to biodiversity and ecological structure during the Cretaceous/Palaeogene mass extinction about 66 million years ago1–3. It has been suggested that during this mass extinction, a collapse of phytoplankton production rippled up the food chain, causing the wholesale loss of consumers and top predators3–5. Pelagic fish represent a key trophic ...
متن کاملThe Role of Pacific Salmon in the Trophic Structure of the Upper Epipelagic Layer of the Western Bering Sea during Summer-Autumn 2002–2006
Pacific salmon are among the dominant fish in the epipelagic layer of the subarctic Pacific Ocean and are considered the principle consumers of forage resources. In recent years (1990s and 2000s) most Pacific salmon stocks have increased two-fold in abundance. Many researchers consider that such high abundance may increase interspecific competition for food and influence density-dependent facto...
متن کاملWestern and Central Pacific Fisheries Commission Cuts More Bait
CONTENTS CLIOTOP/PFRP Workshop: The Role of Squid in Pelagic Marine Ecosystems ............................... 2 Papua New Guinea Tuna-Tagging Project ................. 5 Upcoming Events .................................................. 5 Erratum ................................................................ 7 Pelagic Fisheries Science in the Pacific, 2005 and Beyond—PIFSC and PFRP ............
متن کاملOxygen: A Fundamental Property Regulating Pelagic Ecosystem Structure in the Coastal Southeastern Tropical Pacific
BACKGROUND In the southeastern tropical Pacific anchovy (Engraulis ringens) and sardine (Sardinops sagax) abundance have recently fluctuated on multidecadal scales and food and temperature have been proposed as the key parameters explaining these changes. However, ecological and paleoecological studies, and the fact that anchovies and sardines are favored differently in other regions, raise que...
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تاریخ انتشار 2010