Kaufman Laurence H
Department of Biology, Virginia Polytechnic Institute and State University, 24061, Blacksburg, Virginia, USA.
Oecologia. 1982 Jan;52(1):57-63. doi: 10.1007/BF00349012.
This study explored the influence of copper disturbance frequency in model stream ecosystems on: stream Aufwuchs biomass accumulation, Aufwuchs stress resistance and resilience, diatom diversity, and species composition. Duplicate experiments were conducted in which four streams were subjected to four different copper dosing regimes (frequencies): continuously, once daily, every third day, and no dose. After ten days of the initial dosing regimes, each stream received an additional copper twenty-four-hour disturbance. Resistance and resilience to the additional disturbance were greater in streams dosed with copper either continuously or once daily. In contrast, diatom species number, diatom diversity, and accumulations of extractible adenosine triphosphate and chlorophyll a were greater in streams dosed either every thrid day or not at all. In addition, stress resistance was inversely related to community age.
溪流附着生物量积累、附着生物抗逆性和恢复力、硅藻多样性及物种组成。进行了重复实验，其中四条溪流接受四种不同的铜添加方案（频率）：持续添加、每日一次、每三天一次以及不添加。在初始添加方案实施十天后，每条溪流再接受一次额外的24小时铜干扰。持续或每日添加铜的溪流对额外干扰的抗性和恢复力更强。相比之下，每三天添加一次或根本不添加铜的溪流中，硅藻物种数量、硅藻多样性以及可提取三磷酸腺苷和叶绿素a的积累量更大。此外，抗逆性与群落年龄呈负相关。
