期刊
JOURNAL OF LIMNOLOGY
卷 70, 期 2, 页码 255-262出版社
PAGEPRESS PUBL
DOI: 10.4081/jlimnol.2011.255
关键词
aquatic environments; Crustacea; diapause; subfossils; eutrophication; pollution
类别
资金
- Academy of Finland
- Kone Foundation
To investigate the extent to which anthropogenic perturbations such as eutrophication and trace metal pollution (i.e.. environmental stress sensu dun, 1985) influence the reproductive modes of cladoceran populations, we analyzed the abundance of subfossils of the chydorids Alonella nana (Baird, 1850) and Alona affinis (Leydig. 1860) in sediment cores from three Finnish lakes. Reconstruction of lakes' pollutant history and the biological response of chydorids indicate that in two of the lakes the proportion of individuals reproducing sexually increased with environmental stressors. More specifically. A. nana responded to eutrophication in Lake Hamptrask with greater production of ephippia, while A. affinis responded to aluminum pollution or acidification in Lake Pieni Majaslampi. In contrast, the reference lake, Lake Iso Lehmalampi, showed no radical changes in sexual reproduction over the two-millennium long sediment record. We conclude that chydorids may use sexual reproduction as a strategy for overcoming unexpected environmental stresses.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据