PMID- 18313720
OWN - NLM
STAT- MEDLINE
DCOM- 20080805
LR  - 20080430
IS  - 0045-6535 (Print)
IS  - 0045-6535 (Linking)
VI  - 72
IP  - 1
DP  - 2008 May
TI  - Analysis of biomagnification of persistent organic pollutants in the aquatic food 
      web of the Mekong Delta, South Vietnam using stable carbon and nitrogen isotopes.
PG  - 104-14
LID - 10.1016/j.chemosphere.2008.01.011 [doi]
AB  - The present study elucidated the biomagnification profiles of persistent organic 
      pollutants (POPs) through a tropical aquatic food web of Vietnam based on trophic 
      characterization using stable nitrogen analysis. Various biological samples 
      collected from the main stream of the Mekong Delta were provided for the analysis 
      for both POPs, and stable nitrogen and carbon isotope ratios. Of the POPs 
      analyzed, dichlorodiphenyltrichloroethane and its metabolites (DDTs) were the 
      predominant contaminants with concentrations ranging from 0.058 to 12 ng/g wet 
      weight, followed by polychlorinated biphenyls (PCBs) at 0.017-8.9 ng/g, chlordane 
      compounds (CHLs) at 0.0043-0.76 ng/g, tris-4-chlorophenyl methane (TCPMe) at 
      N.D.-0.26 ng/g, hexachlorocyclohexane isomers (HCHs) at N.D.-0.20 ng/g and 
      hexachlorobenzene (HCB) at 0.0021-0.096 ng/g. Significant positive increases of 
      concentrations in DDTs, CHLs, and TCPMe against the stable nitrogen ratio 
      (delta(15)N) were detected, while, concentrations of HCHs and HCB showed no 
      significant increase. The slopes of the regression equations between the 
      log-transformed concentrations of these POPs and delta(15)N were used as indices 
      of biomagnification. The slopes of the POPs for which positive biomagnification 
      was detected ranged from 0.149 to 0.177 on a wet weight basis. The slopes of DDTs 
      and CHLs were less than those reported for a marine food web of the Arctic Ocean, 
      indicating that less biomagnification had occurred in the tropical food web. Of 
      the isomers of CHLs, unlike the studies of the Arctic Ocean, oxychlordane did not 
      undergo significant biomagnification through the food web of the Mekong Delta. 
      This difference is considered to be due to a lack of marine mammals, which might 
      metabolize cis- and trans-chlordane to oxychlordane, in the Mekong Delta 
      ecosystem. The biomagnification profile of TCPMe is reported for the first time 
      in the present study.
FAU - Ikemoto, Tokutaka
AU  - Ikemoto T
AD  - Department of Life Environment Conservation, Faculty of Agriculture, Ehime 
      University, Tarumi 3-5-7, Matsuyama, Ehime 790-8566, Japan.
FAU - Tu, Nguyen Phuc Cam
AU  - Tu NP
FAU - Watanabe, Michio X
AU  - Watanabe MX
FAU - Okuda, Noboru
AU  - Okuda N
FAU - Omori, Koji
AU  - Omori K
FAU - Tanabe, Shinsuke
AU  - Tanabe S
FAU - Tuyen, Bui Cach
AU  - Tuyen BC
FAU - Takeuchi, Ichiro
AU  - Takeuchi I
LA  - eng
PT  - Journal Article
PT  - Research Support, Non-U.S. Gov't
DEP - 20080303
PL  - England
TA  - Chemosphere
JT  - Chemosphere
JID - 0320657
RN  - 0 (Carbon Isotopes)
RN  - 0 (Nitrogen Isotopes)
RN  - 0 (Water Pollutants)
SB  - IM
MH  - Carbon Isotopes/*chemistry
MH  - *Food Chain
MH  - Nitrogen Isotopes/*chemistry
MH  - Vietnam
MH  - Water Pollutants/*analysis
EDAT- 2008/03/04 09:00
MHDA- 2008/08/06 09:00
CRDT- 2008/03/04 09:00
PHST- 2007/06/18 00:00 [received]
PHST- 2007/12/23 00:00 [revised]
PHST- 2008/01/04 00:00 [accepted]
PHST- 2008/03/04 09:00 [pubmed]
PHST- 2008/08/06 09:00 [medline]
PHST- 2008/03/04 09:00 [entrez]
AID - S0045-6535(08)00033-7 [pii]
AID - 10.1016/j.chemosphere.2008.01.011 [doi]
PST - ppublish
SO  - Chemosphere. 2008 May;72(1):104-14. doi: 10.1016/j.chemosphere.2008.01.011. Epub 
      2008 Mar 3.