Perturbation Planktivory, and Pelagic Community Structure: The Consequence of Winterkill in a Small Lake
Perturbation Planktivory, and Pelagic Community Structure: The Consequence of Winterkill in a Small Lake
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浮游生物扰动和远洋群落结构：小湖温特基尔的后果
DOI：
10.1139/f89-271
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发表时间：
1989
影响因子：
2.4
通讯作者：
T. Ehlinger
中科院分区：
文献类型：
--
作者：
Donald J. Hail;T. Ehlinger
密歇根州富营养化的冬青湖的顶级捕食者（大口黑鲈，Micropterus salmoides）在1978年和1979年被连续的冬杀所消灭。在2年内，黄金光泽（Notemigonus crysoleucas），兼性食草动物，占主导地位的鱼类群落。浮游动物，以前由大型蚤状水蚤和D。galeata mendotae，伴随着转移到一个社区组成的较小的物种：Bosmina和小桡足类。在1981年和1982年的现场鱼类围隔实验表明，大型水蚤物种将生长在冬青湖的情况下，金闪光。金亮鲷对大型和小型浮游动物分别表现出颗粒和过滤的摄食模式。这种灵活的摄食行为表明，金闪光灯能够防止水蚤的重建，而Bosmina和其他小型浮游动物支持一个高的，显然是稳定的金闪光灯密度。
The top predator (largemouth bass, Micropterus salmoides) in eutrophic Wintergreen Lake, Michigan, was eliminated by successive winterkills in 1978 and 1979. Within 2 yr, the golden shiner (Notemigonus crysoleucas), a facultative planktivore, dominated the fish community. The zooplankton, previously consisting of large Daphnia pulex and D. galeata mendotae, concomitantly shifted to a community consisting of smaller species: Bosmina and small copepods. In situ fish enclosure experiments in 1981 and 1982 revealed that the large Daphnia species would grow in Wintergreen Lake in the absence of the golden shiner. Golden shiners exhibit both a particulate and filtering mode of planktivory on large and small zooplankton, respectively. This flexible feeding behavior suggests that golden shiners are able to prevent the reestablishment of Daphnia, while Bosmina and the other small zooplankton support a high and apparently stable golden shiner density.