Influence of the ornamental red cherry shrimp Neocaridina davidi (Bouvier, 1904) on freshwater meiofaunal assemblages

详细信息    查看全文

• 作者：Sebastian Weber ; ^{se.weber5@gmail.com" class="auth_mail" title="E-mail the corresponding author} ; Walter Traunspurger
• 关键词：Aquaculture ; Food web ; Meiobenthos ; Neozoa ; Predator-prey interactions ; Secondary production
• 刊名：Limnologica - Ecology and Management of Inland Waters
• 出版年：2016
• 出版时间：July 2016
• 年：2016
• 卷：59
• 期：Complete
• 页码：155-161
• 全文大小：1136 K

文摘

Meiofauna serves as a link between microbial production and higher trophic levels, such as macroinvertebrates and juvenile fish. However, the role of meiofauna in the freshwater food web has not been accurately evaluated, and the influence of shrimp predation on freshwater meiofaunal assemblages is unknown. In this study, the predation effects of m>Neocaridina davidim>, an ornamental freshwater shrimp native to inland water bodies in Asia, on meiofaunal density, biomass, structure, and secondary production were examined using model ecosystems (microcosms) that were sampled repeatedly over 42 days. Shrimp predation altered the structure of the meiofaunal community over the course of the experiment, in particular the density, biomass, and secondary production of nematodes, microcrustaceans, and oligochaetes. An analysis of the stomach contents of m>N. davidim> indicated a high degree of omnivory and the frequent consumption of meiofaunal organisms. The results indicated that predation by the freshwater shrimp m>N. davidim> depresses the overall abundance, biomass, and secondary production of meiofaunal assemblages. Moreover, they also provide insights into food-web ecology and the first evidence of freshwater shrimp predation on meiofaunal assemblages.