Do the regular annual extreme water level changes affect the seasonal appearance of Anabaena in Poyang Lake?

ABSTRACT:

Background

Poyang Lake is an ecosystem experiencing annual variations in water level of up to 14 m. Water level changes were 8.03 and 11.22 m, respectively, in the years 2013 and 2014. The biomass and heterocyst frequency of Anabaena increased in the summers of recent years.

Methods

A weekly to bi-weekly monitoring from June to November 2013 and 2014 was set up to explain the variations of Anabaena appearance in different phases of the water level.

Results

Anabaena was present in the lake throughout the year. The average relative biomass of Anabaena in the present study was over 40%, being most abundant in summer. The average heterocyst frequency was 0.23% in 2013 and 0.76% in 2014. Correlation analysis indicated a positive trend of Anab

SUBMITTER: Qian K 

PROVIDER: S-EPMC6463853 | biostudies-literature | 2019

REPOSITORIES: biostudies-literature