摘要
五十年代中期吴宝华曾对舟山群岛的双壳类软体动物作过报道,其中提到有数种分布于朱家尖岛潮间带;八十年代初蔡如星等在进行全省海岸带生物调查过程中就该岛潮间带动物做过定点观察。但是对该岛潮间带软体动物的生态学研究尚未见专题报告。随着朱家尖旅游胜地的开发和对外开放,搞清该岛生物分布及其资源状况,进行合理地规划和利用就显得十分紧迫;在动物区系划分上,该岛正处在北太平洋区的远东亚区和印度西太平洋区的中国—日本亚区的过渡带上,了解该岛的生物组成和群落结构在区系区划上也具有一定意义。为此我们于1986年2月到1987年1月对该岛潮间带的软体动物进行了逐月连续采集,获得了丰富的生态学资料。现就该岛潮间带岩相软体动物的群落组成、垂直分布以及数量的季节变化提出报告,以供水产和环保部门参考。
Zhujiajian Island is situated on the north part of the Zhejiang coast, 122°19′38″ to 122°25′40″E, 29°49′30″ to 29°57′30″N. From February, 1986 to January, 1987, at the intertidal zone of the island monthly continuous ecological surveys were made by the Zhejiang College of Fisheries.
55 species of mollusca at the intertidal zone of Zhujiajian Island are reported. They belong to 4 classes. Over 10 of the 55 species are chief economic species.
In this paper, the community structure and numerical distribution are desoribed in detail.
Two communities are found at the high zone: (1) Nodilittorina granularis community, and (2) Littorina brevicula-Nodilittorina granularis community. Three communities at midtidal zone: (1) Monodonta labio-Septifer virgatus community, (2) Purpura clavigear-Monodonta labio Barbatia virescens community and (3) Chlorostoma rusticaPurpura-clavigera community. One community at low tidal zone: Serpulorbis imbricata Chlorostoma rustica community.
The order of the seasonal biomass of mollusca organisms is as follows: spring, (293.03 g/m^2)>winter(210.74 g/m^2)>autumn(l90.11 g/m^2)>summer(89.53 g/m^2) The yearly biomass averaged is 195.85 g/m^2. The order of the seasonal density (ind./m^2) is as follows: winter (832.4)>spring (560.2)>autumn (330.0)>summer (206.3), The yearly density averaged is 482.22 ind./m^2.
We have statistically treated the data of the Community structure with species diversity index (H′), richness index (d) and evenness index (J) in this paper.
出处
《海洋湖沼通报》
CSCD
北大核心
1989年第3期38-45,共8页
Transactions of Oceanology and Limnology
