NDLI: Trophic interactions, ecosystem structure and function in the southern Yellow Sea

Content Provider	Springer Nature Link
Author	Lin, Qun Jin, Xianshi Zhang, Bo
Copyright Year	2013
Abstract	The southern Yellow Sea is an important fishing ground, providing abundant fishery resources. However, overfishing and climate change have caused a decline in the resource and damaged the ecosystem. We developed an ecosystem model to analyze the trophic interactions and ecosystem structure and function to guide sustainable development of the ecosystem. A trophic mass-balance model of the southern Yellow Sea during 2000–2001 was constructed using Ecopath with Ecosim software. We defined 22 important functional groups and studied their diet composition. The trophic levels of fish, shrimp, crabs, and cephalopods were between 2.78 and 4.39, and the mean trophic level of the fisheries was 3.24. The trophic flows within the food web occurred primarily in the lower trophic levels. The mean trophic transfer efficiency was 8.1%, of which 7.1% was from primary producers and 9.3% was from detritus within the ecosystem. The transfer efficiency between trophic levels II to III to IV to V to >V was 5.0%, 5.7%, 18.5%, and 19.7%–20.4%, respectively. Of the total flow, phytoplankton contributed 61% and detritus contributed 39%. Fishing is defined as a top predator within the ecosystem, and has a negative impact on most commercial species. Moreover, the ecosystem had a high gross efficiency of the fishery and a high value of primary production required to sustain the fishery. Together, our data suggest there is high fishing pressure in the southern Yellow Sea. Based on analysis of Odum’s ecological parameters, this ecosystem was at an immature stage. Our results provide some insights into the structure and development of this ecosystem.
Starting Page	46
Ending Page	58
Page Count	13
File Format	PDF
ISSN	02544059
Journal	Chinese Journal of Oceanology and Limnology
Volume Number	31
Issue Number	1
e-ISSN	19935005
Language	English
Publisher	SP Science Press
Publisher Date	2013-01-16
Publisher Place	Heidelberg
Access Restriction	Subscribed
Subject Keyword	Ecopath trophic interactions ecosystem structure fisheries the southern Yellow Sea Oceanography
Content Type	Text
Resource Type	Article
Subject	Water Science and Technology Oceanography

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