摘要
于2007年10月在椒江口共布设6条潮间带采样断面,每条断面在中潮带上区、中区、下区和低潮区各设1站位进行大型底栖动物采样。分析了不同采样站位数与大型底栖动物种数的关系,选用Wilson-Shmida beta多样性测度方法,对以下3种空间环境梯度下大型底栖动物群落beta多样性进行了研究:(1)断面内垂直环境梯度;(2)河流到海洋的环境梯度;(3)河口两岸间的距离梯度。分析了不同采样站位数对群落beta多样性指数的影响,结果显示:(1)随着采样站位数的增加,物种数呈增加趋势但增速渐慢,同时beta多样性指数呈下降趋势;(2)不同的潮区间隔下的be-ta多样性指数均有显著差异;(3)在北岸和南岸,随着断面间距的增加beta多样性指数均呈升高趋势,而且与各断面的沉积物粒度、油类含量呈显著相关;(4)椒江口为喇叭形河口,随着河口两岸断面距离的增加beta多样性指数呈升高趋势。
Field investigation of intertidal zone macrozoobenthos was carried out in October 2007 in the Jiao- jiang Estuary, and four stations were set up in each of six sampling sections. Analysis of the relationship between the species number and the station number was conducted, furthermore, beta diversity theory was used to analyze the rnacrozoobentbos community in the following environmental gradients： （1） the vertical environmental gradient within the intertidal sampling section; （2） the environmental gradient from river to sea; （3） environmental gradient of the distance between two banks of estuary. Main research findings are as follows： （1） With the increase of sampling station number, species number has a uptrend but the varie- ty rate is more and more slow, besides, beta diversity index presents a downtrend; （2） beta diversity index has a significant change in different vertical distances within the sampling section; （3） with the raise of spatial scale, beta diversity index presents a uptrend both in north and south banks, and which had a sig- nificant correlation with the grain size and oils concentration of sediment; （4） the Jiaojiang Estuary had a trumpet shape, and beta diversity index also presents a growing trend with the increase of the distance between the two banks of the estuary.
出处
《海洋学报》
CAS
CSCD
北大核心
2009年第3期103-112,共10页
基金
国家专项资助(ZJ908-01-01-3
908-ZC-Ⅱ-04
908-02-04-02)
国家海洋局第二海洋研究所基本科研业务费专项资助(JT0806)
关键词
椒江口
潮间带
大型底栖动物
beta多样性
环境梯度
Jiaojiang Estuary
intertidal zone
macrozoobenthos
beta diversity
environmental gradient
