Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1890/0012-9658(2003)084[1189:HLTRTE]2.0.CO;2 |
How long to rest: The ecology of optimal dormancy and environmental constraint | |
Caceres, CE; Tessier, AJ | |
通讯作者 | Caceres, CE |
来源期刊 | ECOLOGY
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ISSN | 0012-9658 |
出版年 | 2003 |
卷号 | 84期号:5页码:1189-1198 |
英文摘要 | Dormancy is a common mechanism employed by short-lived organisms for persistence in a variable environment. Theory suggests that the fraction of propagules that terminate dormancy each year should be <100% when recruitment success varies temporally. Moreover, the fraction of propagules that resumes development should vary across habitats that differ in the probability of successful recruitment or the probability of survival during dormancy. We tested these predictions by using dormant eggs from five populations of the freshwater cladoceran Daphnia pulicaria that differ in their ability to recruit to and persist in the water column. In two separate experiments, newly produced dormant eggs were incubated in situ for one year at various sites on the bottom of the lakes. A series of reciprocal transplants among four of these populations separated the effects of lake-specific environmental cues from the genetic and maternal effects of the different populations. Additional eggs were incubated in the laboratory under photoperiod-temperature combinations representative of those in the field. We found that the annual hatching fraction ranged from 6% to 50% among lakes, and that hatching fraction was primarily driven by environmental cues rather than being a result of the source of the eggs. However, laboratory incubations demonstrated significant differences among populations in the trajectories of the hatching curves, and a much higher rate of hatching than the field incubations. Our results suggest that variation in dormancy strategies within these systems is likely influenced both by the seasonal risk experienced by the active individuals and by risks associated with entering the dormant egg bank. |
英文关键词 | bet hedging Daphnia pulicaria diapause dormancy optimal dormancy termination and environmental cues resting eggs zooplankton |
类型 | Article |
语种 | 英语 |
国家 | USA |
收录类别 | SCI-E |
WOS记录号 | WOS:000184120500012 |
WOS关键词 | RANDOMLY VARYING ENVIRONMENTS ; ESS GERMINATION STRATEGIES ; BET-HEDGING GERMINATION ; DAPHNIA DIAPAUSING EGGS ; DESERT ANNUALS ; SEED-GERMINATION ; SEXUAL EGGS ; POPULATIONS ; EMERGENCE ; RESPONSES |
WOS类目 | Ecology |
WOS研究方向 | Environmental Sciences & Ecology |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/144474 |
作者单位 | (1)Univ Illinois, Sch Integrat Biol, Urbana, IL 61801 USA;(2)Michigan State Univ, Kellogg Biol Stn, Hickory Corners, MI 49060 USA;(3)Michigan State Univ, Dept Zool, Hickory Corners, MI 49060 USA |
推荐引用方式 GB/T 7714 | Caceres, CE,Tessier, AJ. How long to rest: The ecology of optimal dormancy and environmental constraint[J],2003,84(5):1189-1198. |
APA | Caceres, CE,&Tessier, AJ.(2003).How long to rest: The ecology of optimal dormancy and environmental constraint.ECOLOGY,84(5),1189-1198. |
MLA | Caceres, CE,et al."How long to rest: The ecology of optimal dormancy and environmental constraint".ECOLOGY 84.5(2003):1189-1198. |
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