Homogenization of diatom assemblages is driven by eutrophication in tropical reservoirs

Zorzal-Almeida, Stéfano; Bartozek, Elaine Cristina Rodrigues; Bicudo, Denise C.

doi:10.1016/j.envpol.2021.117778

Cited by 23 publications

(11 citation statements)

References 47 publications

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“…Eutrophication is one of the most widespread causes of biotic homogenization in freshwater ecosystems (Zorzal‐Almeida et al, 2021), and nitrogen and phosphorus are the two main nutrients responsible for eutrophication. TN ( p = 0.017) and TP ( p = 0.016) showed a significant negative correlation with taxonomic β‐diversity (ΔTD).…”

Section: Discussionmentioning

confidence: 99%

Temporal variations of the multifaceted biodiversity and assembly mechanisms in lake fish assemblages

Liang,

Guo,

Gozlan

et al. 2024

Ecosphere

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Understanding long‐term changes in fish diversity and community assembly rules is crucial for freshwater conservation. Growing evidence indicates that studying functional and phylogenetic diversity beyond purely taxonomic considerations can provide different but complementary information on community assembly. Here, the taxonomic, functional, and phylogenetic β‐diversity of fish communities, as well as the community assembly mechanisms, were explored in five impounded lakes of the China's South‐to‐North Water Diversion Project (SNWDP) from the 1980s to the 2010s. We found that (1) there was an obvious trend of species homogenization in the five impounded lakes, but the long‐term transformations of different dimensional β‐diversity were divergent; (2) water quality and land use variables have greater impacts on multidimensional β‐diversity; and (3) community assembly process in taxonomic and functional dimensions were dominated by random process in both periods, while shifting from limiting similarity to habitat filtering in the phylogenetic dimension. These results highlight that functional and phylogenetic diversity are important additional ecological indices for assessing the patterns of fish diversity in lakes.

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Section: Discussionmentioning

confidence: 99%

Temporal variations of the multifaceted biodiversity and assembly mechanisms in lake fish assemblages

Liang,

Guo,

Gozlan

et al. 2024

Ecosphere

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“…Similarly, the SIMPER analysis, used to identify characteristic taxa of the groups validated by ANOSIM (i.e., sampling months), showed low average similarity values, which reveals little robustness of these taxa indications. In other words, although there are differences among sampling months, the resulting temporal succession is not very strong, which is probably due to the drought in 2017, 2018, and 2019 that tended to homogenize communities [119,120]. In June 2016, with greater water availability, the indicator taxon was Chlorophyta (Tetraedron minimum), which bloomed in the Faveta, Figueira Gorda, and Poilão reservoirs; in May 2017, the indicator taxa were only Cyanobacteria, given the dominance of this group in all reservoirs.…”

Section: Phytoplankton 421 Phytoplankton Assemblages and Diversitymentioning

confidence: 99%

Some Observations on Phytoplankton Community Structure, Dynamics and Their Relationship to Water Quality in Five Santiago Island Reservoirs, Cape Verde

Morais

Penha

Novais

et al. 2021

Water

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Reservoirs provide valuable services to human beings, especially in arid, semi-arid, and Mediterranean regions affected by water scarcity. The present effort aims to study the environmental descriptors of variation and the main factors influencing phytoplankton composition, structure, and diversity in five reservoirs in Santiago Island, Cape Verde, a region affected by water availability. Five campaigns took place from 2016 to 2020 to sample phytoplankton and measure environmental variables according to standard analytical methodologies. Environmental results (17 water physicochemical variables, air temperature, and precipitation) revealed that reservoirs differ in the geological influence variables. The high levels of P and N in water seem to be related to Land Use/Land Cover and are responsible for water-quality degradation. Cyanobacteria dominated the phytoplankton community and posed high risk levels, especially considering that the identified taxa are potential producers of different toxins. Taxa responsible for this dominance were not the same in all reservoirs, emphasizing the dominant role of local habitat factors on community composition and diversity. Overall, the results reveal the importance of defining integrated management plans/strategies for the set of five studied reservoirs, since the processes influencing variation in the phytoplankton community are temporal-scale dependent, with similar biogeographic patterns.

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“…River damming further releases greenhouse gasses from sediments (Maavara et al 2017) and increases evaporation levels from the water body's surface (Levi et al 2015). Reservoir lentic conditions, when coupled with increases in nutrients (eutrophication), could additionally promote diatom species homogenization (Wengrat et al 2018; Zorzal‐Almeida et al 2021), harmful algae blooms (HABs) (Labaut et al 2020), and the invasion of multiple alien species (Johnson et al 2008).…”

Section: Anthropogenic Threatsmentioning

confidence: 99%

Causes and consequences of recent degradation of the Magdalena River basin, Colombia

Salgado

Shurin

Vélez

et al. 2022

Limnol Oceanogr Letters

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Large tropical rivers provide essential societal benefits, including food production, irrigation, hydropower, transportation, and trade routes. However, these human activities pose unprecedented challenges to the integrity of the river systems, a problem that, in most cases, occurs without fully understanding the natural dynamics of these valuable ecosystems. Here, we synthesize the status of recent and long-term (decades-centuries) anthropogenic impacts occurring in one of the world's hotspots of tropical fish diversity, the Magdalena River, Colombia. Unfortunately, the Magdalena River has attracted little research attention compared to similar tropical rivers. We seek to promote research on the compounding impacts of climate change, river impoundment, alien invasive species, catchment deforestation, and water pollution on the Magdalena and the ecosystem services it provides.

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Homogenization of diatom assemblages is driven by eutrophication in tropical reservoirs

Cited by 23 publications

References 47 publications

Temporal variations of the multifaceted biodiversity and assembly mechanisms in lake fish assemblages

Temporal variations of the multifaceted biodiversity and assembly mechanisms in lake fish assemblages

Some Observations on Phytoplankton Community Structure, Dynamics and Their Relationship to Water Quality in Five Santiago Island Reservoirs, Cape Verde

Causes and consequences of recent degradation of the Magdalena River basin, Colombia

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