Phosphorus dietary assimilation and efflux in the marine copepod Acartia erythraea
Liu, S; Wang, WX; Huang, LM; wwang@ust.hk
2006
发表期刊MARINE ECOLOGY-PROGRESS SERIES
ISSN0171-8630
卷号321页码:193-202
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.
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
关键词Phosphorus P-33 Copepods Assimilation Efflux South China Sea
学科领域Ecology ; Marine & Freshwater Biology ; Oceanography
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收录类别sci
资助项目LMB
WOS记录号WOS:000241282700017
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被引频次:7[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.scsio.ac.cn/handle/344004/4890
专题中科院海洋生物资源可持续利用重点实验室
通讯作者wwang@ust.hk
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Liu, S,Wang, WX,Huang, LM,et al. Phosphorus dietary assimilation and efflux in the marine copepod Acartia erythraea[J]. MARINE ECOLOGY-PROGRESS SERIES,2006,321:193-202.
APA Liu, S,Wang, WX,Huang, LM,&wwang@ust.hk.(2006).Phosphorus dietary assimilation and efflux in the marine copepod Acartia erythraea.MARINE ECOLOGY-PROGRESS SERIES,321,193-202.
MLA Liu, S,et al."Phosphorus dietary assimilation and efflux in the marine copepod Acartia erythraea".MARINE ECOLOGY-PROGRESS SERIES 321(2006):193-202.
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