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

Yibo Liao; Lu Shou; Yanbin Tang; Jiangning Zeng; Aigen Gao; Quanzhen Chen; Xiaojun Yan

doi:10.1007/s00343-017-5285-4

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

Updated：2023-05-16

- Macrobenthic assemblages of the Changjiang River estuary (Yangtze River, China) and adjacent continental shelf relative to mild summer hypoxia
- Journal of Oceanology and Limnology Vol. 35, Issue 3, Pages: 481-488(2017)
- Affiliations：
  
  1. Key Laboratory of Marine Ecosystem and Biogeochemistry Second Institute of Oceanography State Oceanic Administration
  2. Key Laboratory of Applied Marine Biotechnology Ministry of Education Marine College of Ningbo University
- Author bio：
- Funds：
- DOI：10.1007/s00343-017-5285-4
  CLC：
- Online First：29 June 2016，
  
  Published：2017
- Accepted：
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Liao, Y., Shou, L., Tang, Y. et al. Macrobenthic assemblages of the Changjiang River estuary (Yangtze River, China) and adjacent continental shelf relative to mild summer hypoxia., Chin. J. Ocean. Limnol. 35, 481–488 (2017). https://doi.org/10.1007/s00343-017-5285-4
DOI：

Liao, Y., Shou, L., Tang, Y. et al. Macrobenthic assemblages of the Changjiang River estuary (Yangtze River, China) and adjacent continental shelf relative to mild summer hypoxia., Chin. J. Ocean. Limnol. 35, 481–488 (2017). https://doi.org/10.1007/s00343-017-5285-4 DOI：

摘要

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.

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