文章基本信息

标题：Stream Periphyton Responses to Nutrient Enrichment and Crayfish Reductions
本地全文：下载
作者：Troy A. Keller ; Melinda L. Moy ; Andrew L. Stock 等
期刊名称：Journal of Freshwater Ecology
印刷版ISSN：0270-5060
电子版ISSN：2156-6941
出版年度：2005
卷号：20
期号：2
页码：303-310
DOI：10.1080/02705060.2005.9664970
出版社：Taylor & Francis
摘要：We used agar-filled clay pots and Iarge cages to examine how periphyton responded to in situ manipulations of nutrient availability and crayfish in a pristine Michigan stream. By day 40, nutrient additions stimulated the autotrophic portion of the periphyton community and resulted in elevated chlorophyll a, algal abundance and biovolume. Diatoms dominated the periphyton with Oscillatoria and Spirogyra the primary filamentous genera. Crayfish, (Orconectes spp.) density had no effect on any indicator of periphyton growth. Low crayfish densities (∼ 1 m -2 ) and the absence of filamentous algal dominance likely limited crayfish effects.