Site contributions to phytoplankton beta diversity along two subtropical reservoirs

Moura, Weder Bernardes de; Silva, Pedro Rogério Leandro da; Baumgartner, Gilmar; Bueno, Norma Catarina; Bortolini, Jascieli Carla

doi:10.1007/s00027-022-00890-3

Cited by 5 publications

(8 citation statements)

References 80 publications

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“…The β diversity of phytoplankton can serve as an excellent model for elucidating the mechanisms that shape aquatic communities in reservoirs ( de Moura et al., 2022 ). Studies examining replacement rates and variations in phytoplankton richness or abundance can be interpreted as indicators of ecosystem function, given the significant dependence of reservoir trophic webs on phytoplankton dynamics ( Znachor et al., 2020 ).…”

Section: Discussionmentioning

confidence: 99%

“… Szabo et al. (2019) suggested that both abundance and binary data sets should be considered when assessing ecological uniqueness, as they can shed light on different ecological interpretation patterns, and de Moura et al. (2022) also identified some differences between data types.…”

Section: Discussionmentioning

confidence: 99%

“…These results indicate that b diversity differences throughout the phytoplankton bloom process included significant species turnover and abundance gradients, both of which jointly influenced the differences in phytoplankton species composition on different sampling days. Szabo et al (2019) suggested that both abundance and binary data sets should be considered when assessing ecological uniqueness, as they can shed light on different ecological interpretation patterns, and de Moura et al (2022) also identified some differences between data types.…”

Section: Discussionmentioning

confidence: 99%

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Daily process and key characteristics of phytoplankton bloom during a low-water level period in a large subtropical reservoir bay

Tan,

Wang,

Cai

2024

Front. Plant Sci.

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Reservoirs, heavily influenced by artificial management, often harbor phytoplankton assemblages dominated by cyanobacteria or dinoflagellates, triggering significant changes in aquatic ecosystems. However, due to limited sampling frequency and insufficient attention to species composition, the bloom processes and key characteristics of phytoplankton community structure have not been systematically elucidated. During the low-water level period when blooms are most likely to occur (June to September) in a tributary bay of the Three Gorges Reservoir, daily sampling was conducted to investigate phytoplankton community composition, identify significant environmental factors, and evaluate important structure characteristics of phytoplankton community. The results showed that Microcystis aeruginosa maintained a clear dominance for almost a month in stage 1, with low Shannon and evenness but a high dominance index. Phytoplankton total density and biomass decreased drastically in stage 2, but Microcystis aeruginosa still accounted for some proportion. The highest Shannon and evenness but the lowest dominance index occurred in stage 3. Peridiniopsis niei occurred massively in stage 4, but its dominant advantages lasted only one to two days. NH4-N was responsible for the dominance of Microcystis aeruginosa, while TP and PO4-P was responsible for the dominance of Peridiniopsis niei; however, precipitation contributed to their drastic decrease or disappearance to some extent. The TN : TP ratio could be considered as an important indicator to determine whether Microcystis aeruginosa or Peridiniopsis niei dominated the phytoplankton community. Throughout the study period, physiochemical factors explained more variation in phytoplankton data than meteorological and hydrological factors. Pairwise comparisons revealed an increase in average β diversity with stage progression, with higher β diversities based on abundance data than those based on presence/absence data. Repl had a greater effect on β diversity differences based on presence/absence data, whereas RichDiff had a greater effect on β diversity differences based on species abundance data. Co-occurrence networks for stage 1 showed the most complex structure, followed by stage 4, while the network for stage 3 was relatively sparse, although the overall community division remained compact. This study provides a useful attempt to explore the status and changes in phytoplankton community structure during the bloom process through high-resolution investigation.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

See 1 more Smart Citation

Daily process and key characteristics of phytoplankton bloom during a low-water level period in a large subtropical reservoir bay

Tan,

Wang,

Cai

2024

Front. Plant Sci.

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“…Environmental homogeneity may also, for example, alter the contributions of a location or a species to the variation in species composition (Legendre and De Cáceres 2013;Moura et al 2022). Among the different measurements associated with beta diversity is ecological uniqueness (Legendre and De Cáceres 2013).…”

Section: Introductionmentioning

confidence: 99%

“…Generally, impounding rivers can affect diversity through some key mechanisms such as dispersal filtering, which reduces the flow directing an organism; or environmental barriers, which modify the flow conditions and filter species according to certain characteristics, managing to select species which are tolerant to the new environmental conditions created by the dam. Therefore, evaluating these aspects of a phytoplankton community is a way of verifying the effects of environmental gradients (Villéger et al 2012), and of understanding the underlying forces that influence a community's structure on different spatial scales (Moura et al 2022).…”

Section: Introductionmentioning

confidence: 99%

Effects of damming, seasonality and different environments on reservoir phytoplankton

Castro,

Silva,

Dunck

2024

Preprint

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Reservoirs transform the physical, biological and chemical characteristics of rivers, altering their flow dynamics and the availability of nutrients. After a river is dammed, the species composition in the reservoir and its tributaries tend to change in response to the new conditions which are generated. This work investigates the tributary rivers and sites along the main channel of the Tocantins River’s middle course. The study was conducted between 2009 and 2013 in the pre- and post-dam periods to evaluate the effects of the dam on phytoplankton. The area of study was located along the middle course of the Tocantins River, where the Estreito hydroelectric power plant is found. The variables of ammonium, nitrate and inorganic phosphorous were those that most contributed to the environmental variation post-damming. The richness in classes of phytoplankton was higher during the pre-dam period, the dry season, and in the environment of the river’s main channel. The classes which stood out the most were Bacillariophyceae, Chlorophyceae and Cyanophyceae. We verified that damming the Tocantins River negatively affected the phytoplankton communities, reducing their richness and density in the post-dam period. The results showed that the species with the largest contributions to beta diversity were found to be the most common and abundant ones, suggesting that the damming of the Tocantins River has led to the loss of sensitive and specialist species.

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Beta diversity predictors of the phytoplankton community in a tropical floodplain

da Silva,

Granjeiro,

de Souza

et al. 2024

Hydrobiologia

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Site contributions to phytoplankton beta diversity along two subtropical reservoirs

Cited by 5 publications

References 80 publications

Daily process and key characteristics of phytoplankton bloom during a low-water level period in a large subtropical reservoir bay

Daily process and key characteristics of phytoplankton bloom during a low-water level period in a large subtropical reservoir bay

Effects of damming, seasonality and different environments on reservoir phytoplankton

Beta diversity predictors of the phytoplankton community in a tropical floodplain

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