期刊
MARINE POLLUTION BULLETIN
卷 63, 期 5-12, 页码 124-134出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.marpolbul.2011.03.002
关键词
Arsenic species; Arsenobetaine; Biomagnification; Stable isotope ratio; Tropical mangrove ecosystem; Vietnam
资金
- Ministry of Education, Culture, Sports, Science, and Technology
- Japan Society for the Promotion of Science [2109237, 207871]
- Grants-in-Aid for Scientific Research [23810023] Funding Source: KAKEN
We performed stable carbon and nitrogen-guided analyses of biomagnification profiles of arsenic (As) species, including total As, lipid-soluble As, eight water-soluble As compounds (arsenobetaine (AB), arsenocholine (AC), tetramethylarsonium ion (TETRA), trimethylarsine oxide (TMAO), dimethylarsinic acid (DMA), monomethylarsonic acid (MMA), arsenate (As[V]), and arsenite (As[III])), and non-extracted As in a tropical mangrove ecosystem in the Ba Ria Vung Tau, South Vietnam. Arsenobetaine was the predominant As species (65-96% of water-soluble As). Simple linear regression slopes of log-transformed concentrations of total As, As fractions or individual As compounds on stable nitrogen isotopic ratio (delta N-15) values are regarded as indices of biomagnification. In this ecosystem, lipid-soluble As (slope, 0.130) and AB (slope, 0.108) were significantly biomagnified through the food web; total As and other water-soluble As compounds were not. To our knowledge, this is one of the first reports on biomagnification profiles of As compounds from a tropical mangrove ecosystem. (C) 2011 Elsevier Ltd. All rights reserved.
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