文章基本信息

标题：The Exotic Daphnid, Daphnia lumholtzi , in a Louisiana River-Swamp
本地全文：下载
作者：Norman L. Davidson Jr. ; William E. Kelso
期刊名称：Journal of Freshwater Ecology
印刷版ISSN：0270-5060
电子版ISSN：2156-6941
出版年度：1997
卷号：12
期号：3
页码：431-435
DOI：10.1080/02705060.1997.9663553
出版社：Taylor & Francis
摘要：The exotic cladoceran, Daphnia lumholtzi, was collected at various sites within the lower Atchafalaya River Basin throughout the summer of 1994. Stepwise regression revealed that seasonal abundance was related to late summer environmental conditions of high specific conductance, low river discharge, and high surface water temperature. Abundances of D. lumholtzi were greatest in sites with high percentages of dissolved oxygen saturation and low current velocity. Within this habitat type, D. lumholtzi exhibited a distinct nocturnal vertical migration, although this behavior was not evident in two other habitats.