长江下游水生动物群落生物多样性变动趋势初探
PRELIMINARY STUDIES ON THE TREND OF CHANGE IN BIODIVERSITY OF AQUATIC ANIMAL COMMUNITY IN THE LOWER REACHES OF THE CHANGJIANG RIVER
-
摘要: 对1990-1999年间长江下游江段生物多样性的变动趋势进行了研究,并就群落稳定性与多样性的关系进行了探讨.结果表明:物种多样性指数量大值为1.1112;最小值为0.0327.反映物种均匀度、丰盛度的指数都有不同程度的下降,而反映优势度的指数却有一定程度的上升,优势度指数最大值为1;最小值为0.340 46,优势种前6位分别为杂虾、青虾、餐条、吻鮠、蛇鮈、黄颡.表明长江下游江段的生物多样性正在逐步丧失.经济鱼类数量趋减,小型野杂鱼类数量趋增.Abstract: The annual variations of bio diversity in the lower reaches of the Yangtze River during 1990-1999 were being studied,and the relationship between the bio diversity and the community stability was also being discussed by the authors. The results indicated that the maximum Shannon Wiener Diversity was 1.1112 and the minimum index was 0.0327.The species abundance and indices and evenness were declining to different degrees,while the McNaughton index heightened. The maximum McNaughton was 1 and the minimum index was 0.340457.The advantage species were shrimp, Macrobrachium nipponense,Hemiculter leucisculus, Rhinogobio typus,Saurogobio dabryi and Pseudobagrus fulvidraco from first to sixth.It showed that bio diversity in the lower reaches of the Yangtze River was declining gradually,and the quantity of fish with high economic value was declining and the quantity of small low valued fish was increasing.
-
-
[1] 湖北省水生生物研究所第一室.长江鱼类[M].北京:科学出版社.1975[2] 夏铭.生物多样性研究进展[J].东北农业大学学报,1999,30(1):94-100[3] 张金屯.论生物多样性保护与持续发展[J].经济地理,1999,19(2):70-75[4] 凌去非,李思发.长江天鹅洲故道鱼类群落种类多样性[J].中国水产科学,1998,5(2):1-5[5] 袁传宓.江苏淡水鱼类[M].南京:江苏科学技术出版社,1987[6] 赵志模.群落生态学原理和方法[M].重庆:科学技术文献出版社,1989.147-172[7] 王献薄,刘玉凯.生物多样性的理论与实践[M].北京:中国环境科学出版社,1994[8] Hopkinson P,Travis J M J,Prendergast J R,et al.A preliminary assessment of the contribution of nature reserves to biodiversity conservation in Great Britain[J].Animal Conservation,2000,4:311-320[9] Moreno J C,Castro I,Humphries C J,et al.The conservation of biodiversity in the Iberian Peninsula and the Balearic Islands[J].Quercus,1998,144:19-22
计量
- 文章访问数: 971
- HTML全文浏览量: 2
- PDF下载量: 687
下载: