Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1007/s10750-005-4292-1 |
Susceptibility of ephemeral pool Hexarthra to predation by the fairy shrimp Branchinecta mackini: can predation drive local extinction? | |
Starkweather, PL | |
通讯作者 | Starkweather, PL |
会议名称 | 10th International Rotifer Symposium |
会议日期 | JUN 07-13, 2003 |
会议地点 | Illmitz, AUSTRIA |
英文摘要 | Isolated rock pools in the US desert southwest often develop dense populations of a lithophilic species of the rotifer Hexarthra. I hypothesized that rotifers persist in these isolated ponds due to the absence of either competition with or predation by potentially sympatric crustaceans, especially anostracans. I tested the latter idea with laboratory and field experiments, in each case exposing rotifers to adult fairy shrimp (Branchinecta mackini, the dominant anostracan in this region in winter ponds) in 200 ml microcosms. In most cases individual female fairy shrimp had distinct negative effects on rotifer suspensions due to direct predatory consumption of the smaller animals. Estimated effective water processing rates ranged from ca. 50 to over 300 ml ind(-1) h(-1) and rotifer consumption rates by female B. mackini were between 280 and > 600 Hexarthra consumed per individual predator per hour. Male B. mackini never significantly reduced rotifer numbers in either laboratory or field microcosms. The results indicate that, while perhaps not the sole determinant of rotifer distribution in these ephemeral pools, fairy shrimp predation can have a strong negative influence on natural Hexarthra populations. |
英文关键词 | anostraca Branchinecta mackini Hexarthra rotifer predation |
来源出版物 | HYDROBIOLOGIA |
ISSN | 0018-8158 |
出版年 | 2005 |
卷号 | 546 |
页码 | 503-508 |
出版者 | SPRINGER |
类型 | Article;Proceedings Paper |
语种 | 英语 |
国家 | USA |
收录类别 | CPCI-S ; SCI-E |
WOS记录号 | WOS:000233117900052 |
WOS关键词 | PROBOSCIDEUS FRAUENFELD BRANCHIOPODA ; ANOSTRACA ; CRUSTACEA ; ANURAEOPSIS |
WOS类目 | Marine & Freshwater Biology |
WOS研究方向 | Marine & Freshwater Biology |
资源类型 | 会议论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/295430 |
作者单位 | (1)Univ Nevada, Dept Biol Sci, Las Vegas, NV 89154 USA |
推荐引用方式 GB/T 7714 | Starkweather, PL. Susceptibility of ephemeral pool Hexarthra to predation by the fairy shrimp Branchinecta mackini: can predation drive local extinction?[C]:SPRINGER,2005:503-508. |
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