包头南海湖浮游植物优势种生态位及种间联结性季节分析

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Abstract

In order to get a better understanding of the annual structural changes and succession rules of phytoplankton community and the interspecific association of the dominant species in lakes at arid-cold regions, the phytoplankton community in Nanhai Lake at Baotou, Inner Mongolia from Dec. 2017 to Nov. 2018 was investigated and analyzed. A total of 151 species of 66 genera of 7 phyla were identified, among which 15 species of 15 genera of 4 phyla were dominant phytoplankton species although those species and their abundance varied with seasons. The improved Levins formula and Petraitis were applied to determine the niche metrics of the phytoplankton dominant species. The results showed that the niche breadth and niche overlap of each dominant species varied seasonally, and the adaptability of each dominant species to the environmental factors also presented a great difference. Under various habitat conditions in the different seasons during the year, the niche of Merismopedia tenuissima had the most significant variation. It could be used as an indicator species of water body pollution status in Nanhai Lake based on a reliable basis of ecology. The niche overlap results showed that ΔSO_ij could represent the trend of species development, which would indicate immediately whether the lake water quality was affected by external factors or not. The test results of the community species correlation and interspecific association showed dominant species pairs showed a significant association, indicating that the interspecific association in the phytoplankton community was positive correlated in general. However, only 10 out of the 128 dominant species pairs showed a significant association, indicating that the phytoplankton community in Nanhai Lake was still in the early and intermediate stages of succession with a loose interspecific association and unstable community structure.

Key words： phytoplankton dominant species niche interspecific association Nanhai Lake

Received: 21 June 2018

PACS:

X524

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	Articles by authors
	YANG Wen-huan
	SHEN Han
	ZHOU Ming-li
	LI Wei-ping
	ZHANG Sheng

Cite this article:

YANG Wen-huan,SHEN Han,ZHOU Ming-li等. Seasonal variation analysis of the niche and interspecific association with respect to the dominant phytoplankton species in Nanhai Lake[J]. CHINA ENVIRONMENTAL SCIENCECE, 2020, 40(1): 383-391.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2020/V40/I1/383

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