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学科主题: Ecology; Marine & Freshwater Biology; Oceanography
题名: Phosphorus dietary assimilation and efflux in the marine copepod Acartia erythraea
作者: Liu, S ; Wang, WX ; Huang, LM
通讯作者: wwang@ust.hk
关键词: phosphorus ; P-33 ; copepods ; assimilation ; efflux ; South China Sea
刊名: MARINE ECOLOGY-PROGRESS SERIES
发表日期: 2006
卷: 321, 页:193-202
收录类别: sci
部门归属: Hong Kong Univ Sci & Technol, Dept Biol, Kowloon, Hong Kong, Peoples R China; Chinese Acad Sci, LAMB, S China Sea Inst Oceanol, Guangzhou 510301, Peoples R China
项目归属: LMB
摘要: We examined the metabolism of phosphorus (P), including its dietary assimilation, efflux, and regeneration, in the marine subtropical copepod Acartia erythraea feeding on diverse types of marine phytoplankton. The P assimilation efficiency (AE) ranged between 19 and 78% when the copepods were fed 6 algal diets at the same concentration (1.45 mg C l(-1)). Among the different algal diets, the AEs were not significantly related to the ingestion rate and the food gut passage time of copepods, or the P partitioning in the algal cytoplasm. The P AE decreased ca. 2-fold when the food concentration increased from 0.073 to 3.625 mg C l(-1), but was not influenced by the P quota in diatoms. The P efflux rates in the copepods feeding on diatoms were 0.30 to 0.36 d(-1) over the food concentrations examined; the efflux rate was significantly higher when the copepods ingested diatoms with higher P quotas, suggesting that the P homeostasis in the copepods may possibly be achieved by efflux of P from the body. During the dietary assimilation and efflux periods, most P lost from the copepods was regenerated into the dissolved phase and only a small portion of P was detected in other compartments (mainly in the feces), suggesting that copepods rapidly regenerate particulate P into the surrounding waters. Our study indicated that both P dietary assimilation and efflux can play an important role in maintaining the P stoichiometry in copepods.
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WOS记录号: WOS:000241282700017
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内容类型: 期刊论文
URI标识: http://ir.scsio.ac.cn/handle/344004/4890
Appears in Collections:中科院海洋生物资源可持续利用重点实验室_期刊论文

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Recommended Citation:
Liu, S; Wang, WX; Huang, LM.Phosphorus dietary assimilation and efflux in the marine copepod Acartia erythraea,MARINE ECOLOGY-PROGRESS SERIES,2006,321():193-202
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文件名: Phosphorus dietary assimilation and efflux in the marine copepod Acartia erythraea .pdf
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