Species Diversity of Fishes in Naturally Acidic Lakes in New Jersey
作者:
JohnH. Graham,
期刊:
Transactions of the American Fisheries Society
(Taylor Available online 1993)
卷期:
Volume 122,
issue 6
页码: 1043-1057
ISSN:0002-8487
年代: 1993
DOI:10.1577/1548-8659(1993)122<1043:SDOFIN>2.3.CO;2
出版商: Taylor & Francis Group
数据来源: Taylor
摘要:
Fish communities in acidic lakes of New Jersey have fewer species than do those in more alkaline lakes of comparable size. This conclusion is based on a multiple regression analysis of published data on fish communities, area, and pH in 85 lakes. Some interesting patterns emerge, however, when species are partitioned into introduced and native species. As expected, diversity of introduced species declines with increasing acidity. The number of native species in a particular lake, however, is independent of pH (range of 4.1 to 9.1). Although diversity of native species is not influenced by pH, species composition changes. The lack of a significant relationship between species diversity of native species and pH can be attributed to the replacement of acid-intolerant species by tolerant species. The smaller number of introduced species in acidic lakes is attributable to both fewer species stocked and a greater frequency of failure for those that were stocked. Species introduction records for largemouth bassMicropterus salmoidesand bluegillLepomis macrochirus, which are not native to New Jersey, reveal far more failed introductions in acidic waters than in neutral or alkaline waters.
点击下载:
PDF (1016KB)
返 回