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Copepod (Crustacea) Emergence from Soils from Everglades Marshes with Different Hydroperiods

 

作者: WilliamF. Loftus,   JanetW. Reid,  

 

期刊: Journal of Freshwater Ecology  (Taylor Available online 2000)
卷期: Volume 15, issue 4  

页码: 515-523

 

ISSN:0270-5060

 

年代: 2000

 

DOI:10.1080/02705060.2000.9663774

 

出版商: Taylor & Francis Group

 

数据来源: Taylor

 

摘要:

During a severe drought period in the winter and spring of 1989, we made three collections of dried marsh soils from freshwater sloughs in Everglades National Park, Florida, at sites characterized by either long or intermediate annual periods of flooding (hydroperiod). After rehydrating the soils in aquaria, we documented the temporal patterns of copepod emergence over two-week periods. The species richness of copepods in the rehydrated soils was lower than in predrought samples from the same slough sites. Only six of the 16 species recorded from the Everglades emerged in the aquarium tests. The long hydroperiod site had a slightly different assemblage and higher numbers of most species than the intermediate-hydroperiod sites. More individuals and species emerged from the early dry-season samples compared with samples taken later in the dry season. The harpacticoid,Cletocamptus deitersi, and the cyclopoid,Microcyclops rubellus, were abundant at most sites. The cyclopoids—Ectocyclops phaleratus, Homocyclops ater, andParacyclops chiltoni—are new records for the Everglades. We infer that 1) only a subset of Everglades copepod species can survive drought by resting in soils; and that 2) survival ability over time differs by species.

 

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