Construction and analysis of a coral reef trophic network for Qilianyu Islands,Xisha Islands |
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| Authors: | Xiaofan Hong Zuozhi Chen Jun Zhang Yan’e Jiang Yuyan Gong Yancong Cai Yutao Yang |
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| Institution: | 1.Key Laboratory for Sustainable Utilization of Open-sea Fishery of Ministry of Agriculture and Rural Affairs, South China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou 510300, China2.Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou), Guangzhou 511458, China3.College of Marine Sciences, Shanghai Ocean University, Shanghai 201306, China |
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| Abstract: | Qilianyu Islands coral reefs (QICR), located in the northeastern part of the South China Sea, has been affected by human activities and natural disturbance. To characterize the trophic structure, ecosystem properties and keystone species of this region, a food-web model for the QICR is developed using methods involving a mass-balance approach with Ecopath with Ecosim software. Trophic levels range from 1.00 for detritus and primary producers to 3.80 for chondrichthyes. The mean trophic transfer efficiency for the entire ecosystem is 13.15%, with 55% of total energy flow originating from primary producers. A mixed trophic impact analysis indicates that coral strongly impacts most components of this ecosystem. A comparison of our QICR model with that for other coral reef ecosystems suggests that the QICR ecosystem is immature and/or is degraded. |
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| Keywords: | South China Sea Qilianyu Islands coral reef Ecopath model food webs ecosystem characteristic |
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