摘要
海洋牧场是近岸渔业资源保护和恢复的有效途径,为评估海洋牧场建设对褐菖鲉和小黄鱼营养生态位和种间竞争关系的影响,基于2013年和2016年调查的碳氮稳定同位素数据,分析种内营养生态位变化趋势与种间竞争的关系.结果表明:从2013年到2016年海洋牧场区褐菖鲉和小黄鱼种内营养生态位明显增大,凸多边形总面积(TA)营养生态位分别由1.89和0.34增加到12.43和8.86,两者的种间生态位重叠面积由0.13增加到7.69;标准椭圆营养生态位分别由1.11和0.14增加到4.94和4.06,两者的种间生态位重叠面积由0增加到0.26.随时间变化,褐菖鲉和小黄鱼δ^(13)C和δ^(15)N呈减小趋势,且δ^(13)C值差异显著,δ^(15)N不显著,两者的种间饵料重叠度从68.9%增加到90.6%.
Marine ranching is an effective way to protect and restore coastal fishery resources. In order to assess the impacts of marine ranching construction on the trophic niches and interspecific competition of Sebastiscus marmoratus and Larimichthys polyactis,we analyzed the relationship between the changes of intraspecies trophic niche and the interspecific competition,based on the carbon and nitrogen stable isotope data of these two species collected from 2013 to 2016. The results showed that the intraspecies trophic niches of both species increased significantly in marine ranching area from 2013 to 2016. The total area of the convex polygon(TA） niche increased from 1. 89 to12.43 for S. marmoratus,and increased from 0.34 and 8.86 for L. polyactis,with the interspecific niche overlap area of these two species increasing from 0.13 to 7. 69. The standard elliptic trophic niche increased from 1.11 to 4.94 for S. marmoratus,and from 0.14 to 4.06 for L. polyactis,with the interspecific niche overlap area increasing from 0 to 0.26. Values of the δ13C and δ15N of both species showed a tendency of decreasing with time,with significant changes of δ13C,but non-significant for δ15N. Dietary overlap between those two species increased from 68.9% to 90.6%.
作者
李朝文
王凯
程晓鹏
章守宇
张云岭
LI Chao-wen1, WANG Kai1, CHENG Xiao- peng, ZHANG Shou-yu1, ZHANG Yun-ling2(1College of Marine Ecology and Environment, Shanghai Ocean University, Shanghai 201306, China; 2Hebei Provincial Research Institute for Engi- neering Technology of Coastal Ecology Rehabilitation, Tangshan 063610, Hebei, China)
出处
《应用生态学报》
CAS
CSCD
北大核心
2018年第5期1489-1493,共5页
Chinese Journal of Applied Ecology
基金
国家自然科学基金项目(41406153
41176110
41606146)
现代农业产业技术体系专项资金(CARS-50)
公益性行业(农业)科研专项经费(201303047
201003068)资助~~
关键词
褐菖鲉
小黄鱼
营养生态位
海洋牧场
碳氮稳定同位素
Sebastiscus marmoratus
Larimichthys polyactis
trophic niche
marine ranching
carbon and nitrogen stable isotope.
