Long-term changes in sedimentary diatom assemblages and their environmental implications in the Changjiang (Yangtze) River estuary, China

Fangjin Cheng; Zhiming Yu; Xiuxian Song

doi:10.1007/s00343-014-3133-3

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Long-term changes in sedimentary diatom assemblages and their environmental implications in the Changjiang (Yangtze) River estuary, China

Updated：2023-05-16

- Long-term changes in sedimentary diatom assemblages and their environmental implications in the Changjiang (Yangtze) River estuary, China
- Journal of Oceanology and Limnology Vol. 32, Issue 1, Pages: 155-161(2014)
- Affiliations：
  
  1. Key Laboratory of Marine Ecology and Environmental Sciences Institute of Oceanology Chinese Academy of Sciences
  2. University of Chinese Academy of Sciences
- Author bio：
- Funds：
- DOI：10.1007/s00343-014-3133-3
  CLC：
- Online First：21 February 2014，
  
  Published：2014
- Accepted：
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Cheng, F., Yu, Z. & Song, X. Long-term changes in sedimentary diatom assemblages and their environmental implications in the Changjiang (Yangtze) River estuary, China., Chin. J. Ocean. Limnol. 32, 155–161 (2014). https://doi.org/10.1007/s00343-014-3133-3
DOI：

Cheng, F., Yu, Z. & Song, X. Long-term changes in sedimentary diatom assemblages and their environmental implications in the Changjiang (Yangtze) River estuary, China., Chin. J. Ocean. Limnol. 32, 155–161 (2014). https://doi.org/10.1007/s00343-014-3133-3 DOI：

摘要

Abstract

Long-term data on diatom assemblages in a sediment core (60 cm) obtained from the Changjiang (Yangtze) River estuary were analyzed in order to assess the environmental changes that took place in the approximately 38 years (as determined by 210Pb measurements)

i.e.

between 1974 and 2012

of sediment accumulation. From the sediment core

62 diatom taxa and genera were identified. The diatom biomass in the core generally increased beginning in the mid-1990s (core depth: 35 cm)

accompanied by a shift in the dominant species from Podosira stelliger and two species of Cyclotella (C. stylorum and C. striata) to Paralia sulcata

three species of Thalassiosira (T. eccentria

T. oestrupii

and T. excentrica)

Actinoptychus undulates

and Thalassionema nitzschioides. The changes in both species diversity and abundance suggested that since the 1980s the estuary has undergone extensive eutrophication. This conclusion was supported by the increased proportion of planktonic species

another indicator of high nutrients inputs

in the Changjiang River estuary.

关键词

Keywords

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