Seasonal cycles of phytoplankton biomass and primary production in a tropical temporarily open-closed estuarine lagoon — The effect of an extreme climatic event

Navas-Parejo, Juan Carlos Carrasco; Corzo, Alfonso; Papaspyrou, Sokratis

doi:10.1016/j.scitotenv.2020.138014

Cited by 21 publications

(5 citation statements)

References 65 publications

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“…First, in the flood period, the mean nutrient concentrations decreased sharply, while turbidity increased in all three habitats of the White River Basin compared with those in the non-flood period ( Supplementary Table 1 ). Nutrients play a key role in community dynamics by supporting phytoplankton growth ( Muhid et al, 2013 ; Navas-Parejo et al, 2020 ), whereas high turbidity usually leads to reductions in euphotic depth and photosynthetically active radiation, which would directly limit phytoplankton growth ( Cardoso et al, 2017 ; Wang et al, 2019 ). Second, increased stream flows and physical disturbances lead to phytoplankton washout and density-independent mortality of most phytoplankton species ( Cook et al, 2010 ; Townsend and Douglas, 2017 ), Third, flooding has a profound influence on the macrophyte structure of the river-oxbow lake system in floodplains ( Ibelings et al, 2007 ; Zhou et al, 2019 ).…”

Section: Discussionmentioning

confidence: 99%

Seasonal variation of phytoplankton community assembly processes in Tibetan Plateau floodplain

Huang

Pan²,

Soininen³

et al. 2023

Front. Microbiol.

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Uncovering the mechanisms underlying phytoplankton community assembly remains a major challenge in freshwater ecology. The roles of environmental filtering and spatial processes in shaping phytoplankton metacommunity in Tibetan floodplain ecosystems under various hydrological conditions are still unclear. Here, multivariate statistics and a null model approach were used to compare the spatiotemporal patterns and assembly processes of phytoplankton communities in the river-oxbow lake system of Tibetan Plateau floodplain between non-flood and flood periods. The results showed that phytoplankton communities had significant seasonal and habitat variations, with the seasonal variations being more remarkable. Phytoplankton density, biomass, and alpha diversity were distinctly lower in the flood than non-flood period. The habitat differences (rivers vs. oxbow lakes) in phytoplankton community were less pronounced during the flood than non-flood period, most likely due to the increased hydrological connectivity. There was a significant distance–decay relationship only in lotic phytoplankton communities, and such relationship was stronger in the non-flood than flood period. Variation partitioning and PER-SIMPER analysis showed that the relative role of environmental filtering and spatial processes affecting phytoplankton assemblages varied across hydrological periods, with environmental filtering dominating in the non-flood period and spatial processes in the flood period. These results suggest that the flow regime plays a key role in balancing environmental and spatial factors in shaping phytoplankton communities. This study contributes to a deeper understanding of ecological phenomena in highland floodplains and provides a theoretical basis for floodplain ecosystem maintenance and ecological health management.

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Section: Discussionmentioning

confidence: 99%

Seasonal variation of phytoplankton community assembly processes in Tibetan Plateau floodplain

Huang

Pan²,

Soininen³

et al. 2023

Front. Microbiol.

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“…Clearly, nutrients are not the only determinant of growth of cyanobacteria. Existing studies have revealed that phytoplankton communities are affected by many environmental factors, such as water temperature, chemical oxygen demand, nutrients, pH, water level, transparency, and water retention time [13][14][15][16][17][18][19][20][21][22][23][24][25]. In-depth studies of the phytoplankton community structures and their evolution will help to understand the structure and function of lake ecosystems.…”

Section: Introductionmentioning

confidence: 99%

Succession Characteristics and Influencing Factors of Phytoplankton Communities in Qionghai Lake

Yin,

Yan,

Wang

et al. 2024

Water

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The phytoplankton population of Qionghai Lake was surveyed in December 2015, March 2016, June 2016, September 2016, and March 2017. A total of 196 species (including varieties) belonging to 77 genera of 7 phyla were identified. The phytoplankton communities were dominated by Chlorophyta and diatoms, and there were significant differences across the five sampling sites. The phytoplankton abundance, which ranged between 13.85 × 104 and 335.54 × 104 cells·L−1, was significantly higher in spring and summer than in autumn and winter. Chlorella sp. and Cyclotella sp. were the dominant populations, and their dominance degree reached as high as 0.54 and 0.33, respectively. The diversity of the phytoplankton populations was significantly higher in spring and summer than in autumn and winter, and the Shannon–Wiener index and Margalef index ranged from 2.49–3.65 and 2.47–3.10, respectively. The water quality of Qionghai Lake was generally good. The trophic level index was between 30 and 60, showing that the water body was overall in a mesotrophic to slightly eutrophic state. The Spearman correlation analyses revealed that ammonium nitrogen (NH4+-N), water temperature (WT), permanganate index (CODMn), and transparency (SD) were the most important environmental factors that influenced the phytoplankton communities. For example, NH4+-N was significantly correlated with Chroococcus sp. (r = 0.41, p < 0.05) and Cryptomonas ovata Ehrenberg (r = 0.45, p < 0.05), and WT was significantly correlated with Cryptomonas marssonii Skuja (r = 0.43, p < 0.05) and Cryptomonas ovata (r = 0.53, p < 0.01).

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“…On the other hand, phytoplankton communities can respond to threats from water quality factors (Michalak et al, 2008). For example, salinity, particulate organic carbon and WT, etc., (Shan et al, 2019;Navas-Parejoa et al, 2020). Salinization of freshwater environment can indirectly affect the abundance of planktonic algae by changing water quality or increasing the intake rate of planktonic algae by zooplankton (Lin et al, 2017;Kaushal et al, 2019).…”

Section: Introductionmentioning

confidence: 99%

Effect of land use and environmental variables on phytoplankton community structure in high-elevation river, upper Yangtze river, China

Wang

Tian

et al. 2023

Front. Environ. Sci.

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The Qinghai-Tibet Plateau is an ecologically fragile region. The changes in physicochemical parameters of water quality [PPOWQ] and land use types [LUT] in different regions will affect the phytoplankton community in rivers, thus threatening the ecosystem. Taking the phytoplankton community as an indicator variable, it is of great significance to study the relative influence of symbiotic factors on regulating human activities and river ecological protection. The results showed that the proportions of Bacillariophyta, Cyanophyta, and Chlorophyta were >84% in the phytoplankton community of taxa composition. The abundance of the phytoplankton community varied from 1.47 × 105 to 7.58 × 105 cells/L. Bacillariophyta had the highest average abundance (>82%). The results of the variance partitioning analysis showed that PPOWQ was the main variable affecting the changes in the phytoplankton community. Redundancy analysis showed that local factors (total nitrogen, salinity, water temperature) and regional factors (forestland, grassland, unused land) (p < 0.05) were the main factors causing the changes in community structure and abundance of dominant algae. The analysis of structural equation models showed that LUT had the least direct impact on the abundance of the phytoplankton community, mainly through changing nutrients and physical parameters. Water temperature and nutrients are still the main factors affecting phytoplankton community abundance. Farmland and forestland are the main sources of total nitrogen in rivers. In general, in the ecologically vulnerable area, it is of guiding significance for the ecological monitoring and management of plateau rivers. In addition to considering water quality, it is also necessary to reasonably plan the LUT around rivers.

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Seasonal cycles of phytoplankton biomass and primary production in a tropical temporarily open-closed estuarine lagoon — The effect of an extreme climatic event

Cited by 21 publications

References 65 publications

Seasonal variation of phytoplankton community assembly processes in Tibetan Plateau floodplain

Seasonal variation of phytoplankton community assembly processes in Tibetan Plateau floodplain

Succession Characteristics and Influencing Factors of Phytoplankton Communities in Qionghai Lake

Effect of land use and environmental variables on phytoplankton community structure in high-elevation river, upper Yangtze river, China

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