Is phytoplankton functional classification a suitable tool to investigate spatial heterogeneity in a subtropical shallow lake?

Crossetti, Luciane Oliveira; Becker, Vanessa; Cardoso, Luciana de Souza; Rodrigues, Lúcia Ribeiro; Costa, Luciana Muratori; Marques, David da Motta

doi:10.1016/j.limno.2012.08.010

Cited by 55 publications

(33 citation statements)

References 47 publications

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“…Phytoplankton functional group approach has been widely used in several ecological studies in lakes and reservoirs, since it allows reducing the number of biological variables in the aquatic ecosystem (Becker et al, 2010;Xiao et al, 2011;Crossetti et al, 2013). In winter, the lowest temperatures mainly favored the development of diatoms such as Aulacoseira granulata, grouped in the P group, generally associated to eutrophic and mixed environments.…”

Section: Discussionmentioning

confidence: 99%

“…The most important functional groups found in the summer period (F and K) are generally related to shallow nutrient-rich water columns with good light availability and higher temperatures (Huszar et al, 2000;Komárek, 2003;Sant'Anna et al, 2006). These groups have been frequently reported as dominants in tropical shallow lakes and reservoirs, usually favored by the stability of the water column, light and nutrients availability Silva et al, 2005;Moura et al, 2007;Dantas et al, 2008;Crossetti et al, 2013).…”

Section: Discussionmentioning

confidence: 99%

“…Water temperature (WT) and dissolved oxygen (DO) were measured with portable digital potentiometers. Euphotic zone (Z eu ) was calculated as 2.7 times the Secchi disk depth (Cole, 1994). Euphotic zone:maximum depth ratio (Z eu :Z max ) was used as an index of light availability in the water column.…”

Section: Methodsmentioning

confidence: 99%

“…The approach by grouping phytoplankton in functional groups, proposed by Reynolds et al (2002) and improved by Padisak et al (2009), has been widely used worldwide in ecological and monitoring purposes (Becker et al, 2010;Xiao et al, 2011;Crossetti et al, 2013). Since species are grouped according to their morpho-physiological features, it is expected that these groups will respond, for example, to changes in the mixing regime and nutrients availability, simplifying the complexity of the ecosystem (Salmaso et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

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Response of phytoplankton to an experimental fish culture in net cages in a subtropical reservoir

et al. 2016

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This study aimed to evaluate nutrients concentration and spatial-temporal changes in phytoplankton biovolume during an experimental fish culture in net cages in a lateral arm of Salto Caxias reservoir, Brazil. Two sampling stations were placed in the affected lateral arm and other two in a cageless lateral arm. Neither abiotic variables nor phytoplankton biovolume presented significant differences between the treatments. Only temporal changes were confirmed by the analysis performed. Both lateral arms were classified as oligotrophic, reflecting low influence of the net cages. Phytoplankton growth seems to be limited by nitrogen. Biovolume values were, in general, low and five major functional groups were recognized (E, F, G, K and P). In summer higher biovolume values were observed and representatives of Chlorophyceae and Cyanobacteria belonging to the functional groups F and K, respectively, were the most important. In winter phytoplankton was mainly composed by Bacillariophyceae taxa from P group. G group was also restricted to winter and E group occurred in winter and summer. The variations recorded in phytoplankton structure appear to have been mainly influenced by seasonal changes in temperature, precipitation and nutrients availability. The effects of net cages on the abiotic variables and phytoplankton biovolume appear to have been small, probably due to the small number of net cages employed and the system dilution capacity. However, a permanent monitoring of phytoplankton is recommended, since this environment has a carrying capacity, from which the trophic state may increase.Keywords: biovolume, environment impact, fish cultivation, functional groups, nutrients concentration. Resposta do fitoplâncton ao cultivo experimental de peixes em tanques-rede em um reservatório subtropical ResumoEste estudo objetivou avaliar alterações nas variáveis abióticas e no biovolume fitoplanctônico durante o cultivo experimental de peixes em tanques-rede em um braço lateral do reservatório de Salto Caxias, Brasil. Foram selecionadas duas estações de amostragem no braço com tanques-rede e outras duas em um braço sem tanques. As variáveis abióticas e o biovolume fitoplanctônico não apresentaram diferenças significativas entre os locais estudados. Apenas mudanças temporais foram confirmadas pelas análises utilizadas. Os dois braços laterais foram classificados como oligotróficos, refletindo a baixa influência dos tanques-rede. O crescimento do fitoplâncton parece ter sido limitado principalmente por nitrogênio. Os valores de biovolume foram, em geral, baixos e cinco principais grupos funcionais foram observados (E, F, G, K e P). No verão, os maiores valores de biovolume foram observados e representantes de Chlorophyceae e Cyanobacteria dos grupos funcionais F e K, respectivamente, se destacaram. No inverno, o fitoplâncton foi composto principalmente por táxons de Bacillariophyceae do grupo P. O grupo G também foi restrito ao inverno e o grupo E ocorreu no inverno e verão. As variações registradas na estrutura do fit...

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Response of phytoplankton to an experimental fish culture in net cages in a subtropical reservoir

et al. 2016

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“…Phytoplankton FGs are sensitivity to environmental variation, hence efficient to predict environmental conditions Nabout et al, 2006;Becker et al, 2009;Bovo-Scomparin et al, 2013;Crossetti et al, 2013;Bortolini et al, 2014). This study aimed to verify the efficacy of phytoplankton FGs as indicators of environmental conditions in floodplain and the effects of the connectivity of the environments to the main river on phytoplankton variation.…”

Section: Introductionmentioning

confidence: 98%

Phytoplankton functional groups indicators of environmental conditions in floodplain rivers and lakes of the Paraná Basin

et al. 2017

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Aim: The objective of this study was to evaluate the efficacy of phytoplankton functional groups as indicators of environmental conditions in floodplain rivers and lakes with different trophic state and connectivity degree to the Paraná River. Phytoplankton functional groups (FGs) cluster sensitive species to environmental variation and can be an alternative for environmental monitoring. Methods: Samples were performed quarterly from 2010 to 2013 in the Ivinhema, Paraná and Baia Rivers and in three lakes permanently connected to each river. Results: 419 taxa were identified, and those taxa that had values greater than 5% of the total biovolume were classified into FGs (P, C, A, B, MP, H1, W1, J, TD, L O , and N). The lakes presented higher biovolume and were more productive than rivers, especially in the dry periods. The rivers presented light limitation and low phytoplankton development. The FG L O was an indicator in rainy seasons. Both rivers and lakes were mostly oligotrophic. We registered FG indicators only for the lakes (A, B, C, E, L O , P, and W1) and mesotrophic environments (A, B, C, E, J, L O , and P). Conclusion: The FGs reflected the seasonal variation and the trophic state of environments in the upper Paraná River floodplain, mainly in the lentic environments. The species-environment relationship (FGs as indicators) was clearer in the lakes, probably because of the longer water retention that allows evidencing the response of the phytoplankton community to environmental factors. On the other hand, the absence of FGs as indicators in the rivers could be due to the high water flow that promotes dispersal stochasticity and masks the relationship between the environmental factors and the phytoplankton community. Thus, phytoplankton FGs proved to be a viable tool to evaluate the environmental conditions in a floodplain.

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Understanding the effects of environmental heterogeneity on the morphofunctional structure of the phytoplankton community during the hydrological year in an Amazon floodplain lake, Brazil

et al. 2022

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Is phytoplankton functional classification a suitable tool to investigate spatial heterogeneity in a subtropical shallow lake?

Cited by 55 publications

References 47 publications

Response of phytoplankton to an experimental fish culture in net cages in a subtropical reservoir

Response of phytoplankton to an experimental fish culture in net cages in a subtropical reservoir

Phytoplankton functional groups indicators of environmental conditions in floodplain rivers and lakes of the Paraná Basin

Understanding the effects of environmental heterogeneity on the morphofunctional structure of the phytoplankton community during the hydrological year in an Amazon floodplain lake, Brazil

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