| Rao Yiyong,Cai Lizhe,Li Wenjun,Chen Xinwei,Yang Deyuan. 2020. Spatiotemporal variations of benthic macrofaunal community in the Xiamen Amphioxus Nature Reserve, eastern South China Sea. Acta Oceanologica Sinica, 39(6):10－18 |
| Spatiotemporal variations of benthic macrofaunal community in the Xiamen Amphioxus Nature Reserve, eastern South China Sea |
| Spatiotemporal variations of benthic macrofaunal community in the Xiamen Amphioxus Nature Reserve, eastern South China Sea |
| Received:June 26, 2019 |
| DOI：10.1007/s13131-020-1587-z |
| Key words:spatiotemporal variation Amphioxus Sand benthic macrofaunal community Branchiostoma biotic index |
| 中文关键词: 时空变化 文昌鱼砂 大型底栖动物群落 文昌鱼 生物指数 |
| 基金项目:The National Key Research and Development Program of China under contract No. 2016YFC0502904; the Public Science and Technology Research Funds Projects of Oceans under contract No. 201305030. |
| Author Name | Affiliation | E-mail | | Rao Yiyong | College of the Environment and Ecology, Xiamen University, Xiamen 361102, China | | | Cai Lizhe | College of the Environment and Ecology, Xiamen University, Xiamen 361102, China
Key Laboratory of the Coastal and Wetland Ecosystems (Xiamen University), Ministry of Education, Xiamen 361102, China | cailizhe@xmu.edu.cn | | Li Wenjun | College of the Environment and Ecology, Xiamen University, Xiamen 361102, China | | | Chen Xinwei | College of the Environment and Ecology, Xiamen University, Xiamen 361102, China | | | Yang Deyuan | College of the Environment and Ecology, Xiamen University, Xiamen 361102, China | |
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| Abstract: |
| In order to realize the spatiotemporal variations of benthic macrofaunal communities at the “Amphioxus Sand” habitat, six surveys including four seasons and three consecutive summers (i.e., 2014, 2015 and 2016) were conducted in two core sites, i.e., Huangcuo (HC) and Nanxian-Shibaxian (NX), in the Xiamen Amphioxus Nature Reserve in China. A total of 155 species of macrofauna were recorded, therein, polychaetes were dominant in terms of species number and density. Significant spatiotemporal variations of macrofaunal communities were observed. The density of polychaetes and the biomass of molluscs in the HC site were higher than those in the NX site. Macrofauna were more diverse and abundant in the cold seasons (winter and spring) than that in the warm seasons (summer and autumn). The annual variations of macrofaunal communities may be attributed to the changes in sediment texture among the three years of the survey. The variations in macrofaunal communities were mainly related to the proportion of polychaetes within the community. In addition, the density of amphioxus (include Branchiostoma japonicum and B. belcheri) was negatively correlated to that of polychaetes, bivalves, and crustaceans. Amphioxus was less likely to be found in the sediments with higher silt and clay content. Five biotic indices including Margaref’s richness index (d), Peilou’s evenness index (J'), Shannon-Wiener diversity index (H'), AMBI and M-AMBI were calculated in the present study. AMBI seems suitable in assessing benthic health at the “Amphioxus Sand” habitat, and a potential risk of ecological health in Xiamen Amphioxus Nature Reserve should be aware. |
| 中文摘要: |
| 为了解“文昌鱼砂”中大型底栖动物群落的时空变化，在位于中国厦门文昌鱼自然保护区的黄厝（HC）和南线-十八线（NX）核心区进行了四个季节以及连续三个夏季（即2014年，2015年和2016年）共六次的调查。共记录了大型底栖动物155种，其中多毛类在物种数和栖息密度方面占优势。大型底栖动物群落存在明显的时空变化。HC多毛类的栖息密度和软体动物的生物量均高于NX。大型底栖动物在寒冷季节（冬季和春季）比温暖季节（夏季和秋季）更加多样且丰富。大型底栖动物群落的年际变化可能与三年的调查中沉积物结构的变化有关。大型底栖动物群落的变异主要与群落中多毛类所占比例有关。文昌鱼（包括日本文昌鱼Branchiostoma japonicum和白氏文昌鱼B. belcheri）的栖息密度与多毛类、双壳类和甲壳类的栖息密度呈负相关。文昌鱼较少出现在粉砂和粘土含量较高的沉积物中。本研究计算了Margaref丰富度指数（d）、Peilou均匀度指数（J'）、Shannon多样性指数（H'）、AMBI和M-AMBI等5个生物指数。AMBI似乎更适用于评估“文昌鱼砂”生境的底栖健康状况，此外，应注意厦门文昌鱼自然保护区的生态健康存在潜在风险。 |
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