NDLI: Macrobenthic assemblages of the Changjiang River estuary (Yangtze River, China) and adjacent continental shelf relative to mild summer hypoxia

Content Provider	Springer Nature Link
Author	Liao, Yibo Shou, Lu Tang, Yanbin Zeng, Jiangning Gao, Aigen Chen, Quanzhen Yan, Xiaojun
Copyright Year	2017
Abstract	To assess the effects of hypoxia, macrobenthic communities along an estuarine gradient of the Changjiang estuary and adjacent continental shelf were analyzed. This revealed spatial variations in the communities and relationships with environmental variables during periods of reduced dissolved oxygen (DO) concentration in summer. Statistical analyses revealed significant differences in macrobenthic community composition among the three zones: estuarine zone (EZ), mildly hypoxic zone (MHZ) in the continental shelf, and normoxic zone (NZ) in the continental shelf (Global R =0.206, P =0.002). Pairwise tests showed that the macrobenthic community composition of the EZ was significantly different from the MHZ (pairwise test R =0.305, P =0.001) and the NZ (pairwise test R =0.259, P =0.001). There was no significant difference in macrobenthic communities between the MHZ and the NZ (pairwise test R =0.062, P =0.114). The taxa included small and typically opportunistic polychaetes, which made the greatest contribution to the dissimilarity between the zones. The effects of mild hypoxia on the macrobenthic communities are a result not only of reduced DO concentration but also of differences in environmental variables such as temperature, salinity, and nutrient concentrations caused by stratification.
Starting Page	481
Ending Page	488
Page Count	8
File Format	PDF
ISSN	02544059
Journal	Chinese Journal of Oceanology and Limnology
Volume Number	35
Issue Number	3
e-ISSN	19935005
Language	English
Publisher	Science Press
Publisher Date	2016-06-29
Publisher Place	Heidelberg
Access Restriction	Subscribed
Subject Keyword	hypoxia macrobenthos benthic community Changjiang estuary low dissolved oxygen Oceanography
Content Type	Text
Resource Type	Article
Subject	Water Science and Technology Oceanography

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