Spatial and temporal distribution analysis of dominant algae in Lake Taihu based on ocean and land color instrument data

Zhu, Yuxin; Li, Yunmei; Bi, Shun; Lyu, Heng; Cai, Xiaolan; Wang, Huaijing; Li, Junda; Li, Jianzhong; Xu, Jie

doi:10.1016/j.ecolind.2023.110959

Cited by 1 publication

(1 citation statement)

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“…Although Chlorophyta decreased significantly in September and October, overall, phytoplankton continued to rise due to Chlorophyta density doubling, and there was a notable increase in October. This contrasts with findings in research on phytoplankton density in natural freshwater lakes [62][63][64]. After a three-year study on phytoplankton community changes in Poyang Lake, Yuan found that phytoplankton density and biomass were consistently higher in summer compared to other seasons.…”

Section: Discussioncontrasting

confidence: 78%

Dynamics of Phytoplankton Communities and Environmental Drivers in Chinese Mitten Crab Aquaculture Ponds: Highlighting the Need for Cyanobacteria Control

Jin,

Ding,

Lin

et al. 2024

Water

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Pond culture is the primary method for cultivating Chinese mitten crab (Eriocheir sinensis), with phytoplankton significantly influencing their growth. Green algae benefit crab growth by serving as supplementary food, while cyanobacteria, particularly during blooms, hinder it and pose health risks. Environmental changes in nutrient levels, temperature, and light significantly affect phytoplankton communities in ponds, impacting both ecosystem stability and crab growth. However, there is a limited understanding regarding the patterns of phytoplankton changes within adult Chinese mitten crab culture ponds. This study conducted monthly collection and analysis of phytoplankton throughout the culture cycle in typical adult Chinese mitten crab culture ponds, concurrently measuring physical and chemical water parameters to explore the correlation between phytoplankton changes and environmental factors. The results revealed distinct seasonal variations in phytoplankton composition. Chlorophyta and Bacillariophyta, such as Chlorella, Pediastrum, and Cocconeis, predominated in spring, while Chlorophyta and cyanobacteria, such as Volvox, Anabaena, and Microcystis, dominated in summer, and cyanobacteria and Bacillariophyta, such as Microcystis, Dolichospermum, and Cocconeis, prevailed in autumn. Total phytoplankton density consistently increased throughout the culture period. Microcystis constituted the majority of cyanobacteria biomass throughout most months. Although the total phytoplankton biomass fluctuated, cyanobacteria biomass consistently rose each month, reaching a peak of 61.7 mg/L in October. Water temperature and pH emerged as the primary environmental drivers influencing changes in phytoplankton community structure. Cyanobacteria density reached its peak between 18 and 26 °C and at a pH range of 7.5–8.5. These findings highlight the need for environmental regulation and cyanobacteria control in Chinese mitten crab culture ponds, thus promoting the health and sustainability of the Chinese mitten crab culture.

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Section: Discussioncontrasting

confidence: 78%