双台子河口文蛤碳、氮、磷收支的季节变化

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Abstract

The seasonal filtration, ingestion and biodeposition rates were in situ measured, and carbon (C), nitrogen (N) and phosphorus (P) budgets of Meretrix meretrix throughout the year were modeled. The results indicated that the scope for growth of M. meretrix in carbon (SFG_C), nitrogen (SFG_N), and phosphorus (SFG_P) all ranged significantly among seasons, and the peak values were detected in summer. Among them, SFG_Cwas negative in spring, SFG_N and SFG_P were always positive thorough the year. The seasonal ranges of SFG_C, SFG_N, and SFG_P were -2.11~18.59mg C/(ind·d), 0.13~5.87mg N/(ind·d), and 0.11~1.45mg P/(ind·d), respectively. Distinct seasonal patterns were shown among the net growth efficiencies in carbon (K_C2), nitrogen (K_N2), and phosphorus (K_P2), and ranked as K_N2 > K_P2 > K_C2. Furthermore, the carbon budgets in spring and autumn was in the following order:the C loss from fecal production (F_C) > the C loss from respiration (E_C) > the C loss from growth (G_C), and in summer was in the following order: G_C > E_C > F_C, in winter was in the following order: G_C > F_C > E_C. The nitrogen and phosphorus budgets were ranked as follows:the N used for growth (G_N) > the N loss from fecal production (F_N) > the N loss from excretion (E_N), The P used for growth (G_P) > the P loss from fecal production (F_P) > the P loss during excretion (E_P), respectively. The C, N, and P budgets illustrated that more N and P than C were consumed for growth and the pelagic primary production was transferred efficiently to a higher trophic level. This study suggests that M. meretrix population may play a key role in the nutrient cycle of the estuarine ecosystem, and should be considered an important component of the ecology of estuaries.

Key words： Meretrix meretrix biogenic element budget scope for growth growth efficiency Shuangtaizi Estuary

Received: 28 June 2017

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	Articles by authors
	ZHANG An-guo
	WANG Li-li
	YUAN Lei
	MA Gong-bo
	ZHANG Xue-hui
	LEI Shuai
	YUAN Xiu-tang

Cite this article:

ZHANG An-guo,WANG Li-li,YUAN Lei等. Seasonal variation in carbon, nitrogen, and phosphorus budgets of the hard clam Meretrix meretrix in Shuangtaizi estuary[J]. CHINA ENVIRONMENTAL SCIENCECE, 2018, 38(2): 700-709.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2018/V38/I2/700

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