Phosphorus dietary assimilation and efflux in the marine copepod Acartia erythraea

CORC > 南海海洋研究所 > 中国科学院南海海洋研究所 > 中科院海洋生物资源可持续利用重点实验室

	Phosphorus dietary assimilation and efflux in the marine copepod Acartia erythraea
	Liu, S; Wang, WX; Huang, LM; wwang@ust.hk
刊名	MARINE ECOLOGY-PROGRESS SERIES
	2006
卷号	321 页码:193-202
关键词	Phosphorus P-33 Copepods Assimilation Efflux South China Sea
ISSN号	0171-8630
英文摘要	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.
学科主题	Ecology ; Marine & Freshwater Biology ; Oceanography
URL标识	查看原文
资助项目	LMB
WOS记录号	WOS:000241282700017
公开日期	2011-07-03
内容类型	期刊论文
源URL	[http://ir.scsio.ac.cn/handle/344004/4890]
专题	南海海洋研究所_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
推荐引用方式 GB/T 7714	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.