Structural Characteristics of Winter Phytoplankton Communities in the Middle and Lower Reaches of the Hanjiang River, China

Di Jia, Di Jia, Li Lin, Li Lin, Lei Dong, Lei Dong, Xiong Pan, Xiong Pan, Weihua Zhao, Weihua Zhao, Sheng Zhang

2022

Abstract

The middle and lower reaches of the Hanjiang River of China occupy a very important position in the national water resources allocation. Since the first outbreak of diatom blooms in the spring of 1992, more than ten blooms have occurred so far, and the frequency of occurrence has gradually increased, and the outbreaks are mostly concentrated in the late winter and early spring (January-March). In this study, nine sampling sites were set up in the middle and lower reaches of the Hanjiang River in January 2020 (winter dry period) to investigate and analyze the phytoplankton community structure and water quality, and the results showed that 6 phyla and 28 genera of phytoplankton were identified in winter, among which Bacillariophyta accounted for the largest proportion. The abundance of phytoplankton at each point varied from 0.57×106 to 1.88×106 cells/L, and the biomass varied from 0.013 to 0.222 mg/L, which can be divided into 12 functional groups. The important functional groups are MP, P, D, E, and J, reflecting that the habitats of the middle and lower reaches of the Hanjiang River are characterized by frequent disturbance, high mixing, and turbid mesotrophic water bodies. The calculated values of phytoplankton diversity show that the individual distribution of phytoplankton genera is relatively uneven, and the eutrophication trend is gradually significant from the middle to the lower reaches, and the water body is generally moderately polluted.

Paper Citation

in Harvard Style

Jia D., Lin L., Dong L., Pan X., Zhao W. and Zhang S. (2022). Structural Characteristics of Winter Phytoplankton Communities in the Middle and Lower Reaches of the Hanjiang River, China. In Proceedings of the 3rd International Symposium on Water, Ecology and Environment - Volume 1: ISWEE; ISBN 978-989-758-639-2, SciTePress, pages 235-242. DOI: 10.5220/0012004700003536

in Bibtex Style

@conference{iswee22,
author={Di Jia and Li Lin and Lei Dong and Xiong Pan and Weihua Zhao and Sheng Zhang},
title={Structural Characteristics of Winter Phytoplankton Communities in the Middle and Lower Reaches of the Hanjiang River, China},
booktitle={Proceedings of the 3rd International Symposium on Water, Ecology and Environment - Volume 1: ISWEE},
year={2022},
pages={235-242},
publisher={SciTePress},
organization={INSTICC},
doi={10.5220/0012004700003536},
isbn={978-989-758-639-2},
}

in EndNote Style

TY - CONF

JO - Proceedings of the 3rd International Symposium on Water, Ecology and Environment - Volume 1: ISWEE
TI - Structural Characteristics of Winter Phytoplankton Communities in the Middle and Lower Reaches of the Hanjiang River, China
SN - 978-989-758-639-2
AU - Jia D.
AU - Lin L.
AU - Dong L.
AU - Pan X.
AU - Zhao W.
AU - Zhang S.
PY - 2022
SP - 235
EP - 242
DO - 10.5220/0012004700003536
PB - SciTePress