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作 者 ：傅素晶,蔡立哲*,梁俊彦,周细平,林和山,黄昆,徐华林

期 刊 ：生态学报 2009年 29卷 9期 页码：4781~4789

关键词：溪沙蚕；红树林湿地；时空分布；气候响应；深圳湾；

Keywords:Namalycastis abiuma, mangrove wetland, spatial-temporal distribution, climate response, Shenzhen Bay,

摘 要 ：根据2004年1月至2007年12月在深圳湾福田红树林湿地3条断面10个取样站进行大型底栖动物14个季度监测获得的溪沙蚕\[Namalycastis abiuma (Müller)\]密度和生物量数据，阐述了溪沙蚕数量的年际变化、季节变化和空间分布，分析了溪沙蚕栖息密度、生物量与部分环境因子的关系。结果表明，深圳湾福田红树林湿地溪沙蚕密度和生物量的年均值大小顺序均是：2005年＞2006年＞2007年＞2004年。溪沙蚕密度的季节均值大小顺序是：夏季＞春季＞冬季＞秋季；而溪沙蚕生物量的季节均值大小顺序是：春季＞夏季＞冬季＞秋季。深圳湾福田红树林湿地溪沙蚕的空间分布很不均匀，不同断面或取样站之间数量差别很大，有红树林的取样站溪沙蚕密度高，没有红树林的取样站溪沙蚕密度很低。相关分析表明，溪沙蚕密度和生物量与沉积物中的总有机质、中值粒径、硫化物等参数没有显著相关关系。溪沙蚕2004年的年平均密度和生物量为最低值， 2005年到2007年逐年下降，与降雨量的减少趋势是一致的，但溪沙蚕的密度、生物量与降雨量、气温、光照时数、相对湿度均没有显著相关。可见，红树林湿地是溪沙蚕喜好栖息的生境，溪沙蚕对降雨量等气候因子的响应不显著。

Abstract:The seasonal and annual population dynamics of Namalycastis abiuma, as well as its spatial distribution, were studied in the Futian mangrove wetland of Shenzhen Bay from January 2004 to December 2007. The monitoring of density and biomass took place at ten sampling stations of three transects. The relationship between N. abiuma quantity and environmental factors was analyzed. The highest annual averages of both density and biomass of N. abiuma in the wetland were recorded in 2005, the second in 2006 and the third in 2007. The lowest annual average occurred in 2004. The highest seasonal average of the distribution density of N. abiuma was in summer and the lowest in autumn, while the highest biomass was in spring and the lowest in autumn. The spatial distribution of N. abiuma was uneven. High density of N. abiuma was found in the mangrove area and low density was found in the non-mangrove area. There was no obvious relationship between the density and biomass of N. abiuma and environmental factors，such as total organic matter, grain size, sulfide abundance, and other factors in the sediment．The lowest annual average of rainfall was in 2004 and decreased annually from 2005 to 2007, which coincided with the annual changes of both density and biomass of N. abiuma. However, there was no direct relationship between the density and biomass of N. abiuma and other environmental factors, such as rainfall, air temperature, illumination time, and relative humidity. In conclusion, N. abiuma preferred the mangrove wetland habitat compared to the non-mangrove area and its response to rainfall and other climate factors mentioned above was not significant.

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