Spatialized ecosystem indicators in the southern Benguela
نویسندگان
چکیده
منابع مشابه
Communicating changes in state of the southern Benguela ecosystem using trophic, model-derived indicators
An updated trophic model of the southern Benguela ecosystem in the period 2004−2008 was constructed, complementing trophic models for earlier periods. The model represents the trophic structure of the system after a southward shift of major resources. There was an increase in biomass of small pelagic fish and cephalopods between the 1980s and 2004–2008 periods, accompanied by declines in severa...
متن کاملPatterns of Distribution and Spatial Indicators of Ecosystem Change Based on Key Species in the Southern Benguela
Several commercially and ecologically important species in the southern Benguela have undergone southward and eastward shifts in their distributions over previous decades, most notably the small pelagic fish sardine Sardinops sagax and anchovy Engraulis encrasicolus. Understanding these changes and their implications is essential in implementing an ecosystem approach to fisheries in the souther...
متن کاملModelling stock dynamics in the southern Benguela ecosystem for the period 1978–2002
Modelling stock dynamics in the southern Benguela ecosystem for the period 1978–2002 L. J. Shannon , V. Christensen & C. J. Walters To cite this article: L. J. Shannon , V. Christensen & C. J. Walters (2004) Modelling stock dynamics in the southern Benguela ecosystem for the period 1978–2002, African Journal of Marine Science, 26:1, 179-196, DOI: 10.2989/18142320409504056 To link to this articl...
متن کاملAn Ecosystem Framework for Fisheries Management in the Southern Benguela Upwelling System
casted the increasing need for fisheries managers to take species interactions into account. It is now widely recognized that ecosystem effects need to be considered in managing fisheries (Pauly 1998, Beamish and Mahnken 1999, Gislason et al. 2000). Steele (1996) concluded that a “regime shift in fisheries management” is required if one is to manage fisheries successfully in the context of ecos...
متن کاملThe Benguela upwelling ecosystem lies adjacent to the south-western coast of Africa, from southern Angola
south-western coast of Africa, from southern Angola (15°S) to Cape Agulhas (35°S; Fig. 1). Ecologically, it is split into separate northern and southern subsystems by a zone of intense perennial upwelling near Lüderitz (26–27.5°S; Shannon 1985). As is characteristic of upwelling ecosystems, the Benguela is highly productive and supports abundant populations of plankton-feeding clupeoids, includ...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: ICES Journal of Marine Science
سال: 2005
ISSN: 1095-9289,1054-3139
DOI: 10.1016/j.icesjms.2004.12.010