Effects of temperature increase and nutrient enrichment on phytoplankton functional groups in a Brazilian semi-arid reservoir

Detalhes bibliográficos
Autor(a) principal: Becker, Vanessa
Data de Publicação: 2018
Outros Autores: Souza, Maria da Conceição de, Crossetti, Luciane Oliveira
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional da UFRN
Texto Completo: https://repositorio.ufrn.br/handle/123456789/30886
Resumo: Aim: Our study aimed to evaluate changes in the phytoplankton functional groups brought about by increases in temperature and nutrients predicted by the Intergovernmental Panel on Climate Change (IPCC) scenario for semi-arid regions. Methods: Two experiments were performed, one in the rainy season and another in the dry season. The nutrient enrichment was based on the annual mean values (August 2012-August 2013) of soluble reactive phosphorus and nitrate verified in the reservoir. The microcosms were exposed to two different temperatures, the five-year average of air temperature in the reservoir (control) and 4°C above the control temperature (warming). The experiment was conducted over 12 days; every three days water samples of approximately 60 mL in volume were taken from the reservoir for chemical and phytoplankton analysis. All species were classified by Reynolds Functional Groups (RFG). Results: The functional groups H1, X1, LO and S1 were the most representative in both seasons (rainy and dry). Our results showed that bloom-forming cyanobacteria, in particular the species of functional groups H1 and M, commonly reported in reservoirs in semi-arid regions of Brazil, were not significantly benefited by the warming and nutrient enrichment. The recruitment of other blue-green species, as well as diatoms and green algae, could be observed. Conclusions: The effects of warming and/or nutritional enrichment can change the structure of the phytoplankton community. However, as not expected as the pessimist scenario, in our study the bloom-forming phytoplankton functional groups did not show changes in relative biomass. Instead, the recruitment of diatoms and green algae currently found in enriched environments was verified, specifically in the rainy period, when nutrient dilution typically occurs
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spelling Becker, VanessaSouza, Maria da Conceição deCrossetti, Luciane Oliveira2020-12-07T22:03:06Z2020-12-07T22:03:06Z2018-11-14SOUZA, Maria da Conceição de; CROSSETTI, Luciane Oliveira; BECKER, Vanessa. Effects of temperature increase and nutrient enrichment on phytoplankton functional groups in a Brazilian semi-arid reservoir. Acta Limnologica Brasiliensia, [S.L.], v. 30, p. 215-224, 14 nov. 2018. FapUNIFESP (SciELO). Disponível em <https://www.scielo.br/scielo.php?script=sci_arttext&pid=S2318-03312018000100405&lng=en&tlng=en>. Acesso em 20 out 2020. http://dx.doi.org/10.1590/s2179-975x7517.2179-975Xhttps://repositorio.ufrn.br/handle/123456789/3088610.1590/s2179-975x7517Aim: Our study aimed to evaluate changes in the phytoplankton functional groups brought about by increases in temperature and nutrients predicted by the Intergovernmental Panel on Climate Change (IPCC) scenario for semi-arid regions. Methods: Two experiments were performed, one in the rainy season and another in the dry season. The nutrient enrichment was based on the annual mean values (August 2012-August 2013) of soluble reactive phosphorus and nitrate verified in the reservoir. The microcosms were exposed to two different temperatures, the five-year average of air temperature in the reservoir (control) and 4°C above the control temperature (warming). The experiment was conducted over 12 days; every three days water samples of approximately 60 mL in volume were taken from the reservoir for chemical and phytoplankton analysis. All species were classified by Reynolds Functional Groups (RFG). Results: The functional groups H1, X1, LO and S1 were the most representative in both seasons (rainy and dry). Our results showed that bloom-forming cyanobacteria, in particular the species of functional groups H1 and M, commonly reported in reservoirs in semi-arid regions of Brazil, were not significantly benefited by the warming and nutrient enrichment. The recruitment of other blue-green species, as well as diatoms and green algae, could be observed. Conclusions: The effects of warming and/or nutritional enrichment can change the structure of the phytoplankton community. However, as not expected as the pessimist scenario, in our study the bloom-forming phytoplankton functional groups did not show changes in relative biomass. Instead, the recruitment of diatoms and green algae currently found in enriched environments was verified, specifically in the rainy period, when nutrient dilution typically occursObjetivo: Nosso estudo teve como objetivo avaliar, através de escala experimental, mudanças dos grupos funcionais fitoplanctônicos devido ao aumento de temperatura e nutrientes fornecidos pelo cenário do IPCC para a região semiárida. Métodos: Foram realizados dois experimentos, um no período chuvoso e outro no período seco. A água coletada no reservatório foi enriquecida com nutrientes (nitrato e fósforo solúvel reativo) em diferentes concentrações. Os microcosmos foram submetidos a duas temperaturas diferentes, média de cinco anos da temperatura do ar noreservatório (controle) e 4°C acima da temperatura de controle (aquecimento). O experimento demorou 12 dias e a cada 3 dias cerca de 60 mL de água eram retiradas para as análises químicas e do fitoplâncton. Todas as espécies foram classificadas pelos grupos funcionais de Reynolds. Resultados: os grupos funcionais H1, X1, LO e S1 foram os mais representativos em ambas as estações (chuvosa e seca). Nossos resultados mostraram que as cianobactérias formadoras de florações, especialmente as espécies de grupos funcionais H1 e M, que são comumente relatadas em reservatórios da região semiárida brasileira, não foram significativamente beneficiadas pelo enriquecimento de nutrientes e aquecimento. O recrutamento de outras espécies de cianobactérias, bem como diatomáceas e algas verdes foram observadas. Conclusões: Os efeitos do aquecimento e/ou do enriquecimento nutricional podem alterar a estrutura da comunidade fitoplanctônica. Entretanto, como não esperado no cenário pessimista, em nosso estudo, os grupos funcionais formadores de floração não mostraram mudanças na sua biomassa relativa. Em vez disso, o recrutamento de diatomáceas e algas verdes, atualmente encontradas em ambientes enriquecidos, foi verificado, especialmente no período chuvoso, quando geralmente há diluição dos nutrientesAssociação Brasileira de LimnologiaAttribution 3.0 Brazilhttp://creativecommons.org/licenses/by/3.0/br/info:eu-repo/semantics/openAccessCyanobacteriaExperimentWarmingReservoirEffects of temperature increase and nutrient enrichment on phytoplankton functional groups in a Brazilian semi-arid reservoirinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleengreponame:Repositório Institucional da UFRNinstname:Universidade Federal do Rio Grande do Norte (UFRN)instacron:UFRNORIGINALEffectsOfTemperatureIncrease_Becker_2018.pdfEffectsOfTemperatureIncrease_Becker_2018.pdfapplication/pdf1258196https://repositorio.ufrn.br/bitstream/123456789/30886/1/EffectsOfTemperatureIncrease_Becker_2018.pdf725afe967bfeb28de69fd6d1d43cd1c3MD51CC-LICENSElicense_rdflicense_rdfapplication/rdf+xml; charset=utf-8914https://repositorio.ufrn.br/bitstream/123456789/30886/2/license_rdf4d2950bda3d176f570a9f8b328dfbbefMD52LICENSElicense.txtlicense.txttext/plain; charset=utf-81484https://repositorio.ufrn.br/bitstream/123456789/30886/3/license.txte9597aa2854d128fd968be5edc8a28d9MD53TEXTEffectsOfTemperatureIncrease_Becker_2018.pdf.txtEffectsOfTemperatureIncrease_Becker_2018.pdf.txtExtracted texttext/plain39379https://repositorio.ufrn.br/bitstream/123456789/30886/4/EffectsOfTemperatureIncrease_Becker_2018.pdf.txt3a9d334a3bc275edf79769dc7875b86cMD54THUMBNAILEffectsOfTemperatureIncrease_Becker_2018.pdf.jpgEffectsOfTemperatureIncrease_Becker_2018.pdf.jpgGenerated Thumbnailimage/jpeg1666https://repositorio.ufrn.br/bitstream/123456789/30886/5/EffectsOfTemperatureIncrease_Becker_2018.pdf.jpg1f4c50f9902155e48003f8da12423314MD55123456789/308862020-12-13 05:01:31.54oai:https://repositorio.ufrn.br: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Repositório de PublicaçõesPUBhttp://repositorio.ufrn.br/oai/opendoar:2020-12-13T08:01:31Repositório Institucional da UFRN - Universidade Federal do Rio Grande do Norte (UFRN)false
dc.title.pt_BR.fl_str_mv Effects of temperature increase and nutrient enrichment on phytoplankton functional groups in a Brazilian semi-arid reservoir
title Effects of temperature increase and nutrient enrichment on phytoplankton functional groups in a Brazilian semi-arid reservoir
spellingShingle Effects of temperature increase and nutrient enrichment on phytoplankton functional groups in a Brazilian semi-arid reservoir
Becker, Vanessa
Cyanobacteria
Experiment
Warming
Reservoir
title_short Effects of temperature increase and nutrient enrichment on phytoplankton functional groups in a Brazilian semi-arid reservoir
title_full Effects of temperature increase and nutrient enrichment on phytoplankton functional groups in a Brazilian semi-arid reservoir
title_fullStr Effects of temperature increase and nutrient enrichment on phytoplankton functional groups in a Brazilian semi-arid reservoir
title_full_unstemmed Effects of temperature increase and nutrient enrichment on phytoplankton functional groups in a Brazilian semi-arid reservoir
title_sort Effects of temperature increase and nutrient enrichment on phytoplankton functional groups in a Brazilian semi-arid reservoir
author Becker, Vanessa
author_facet Becker, Vanessa
Souza, Maria da Conceição de
Crossetti, Luciane Oliveira
author_role author
author2 Souza, Maria da Conceição de
Crossetti, Luciane Oliveira
author2_role author
author
dc.contributor.author.fl_str_mv Becker, Vanessa
Souza, Maria da Conceição de
Crossetti, Luciane Oliveira
dc.subject.por.fl_str_mv Cyanobacteria
Experiment
Warming
Reservoir
topic Cyanobacteria
Experiment
Warming
Reservoir
description Aim: Our study aimed to evaluate changes in the phytoplankton functional groups brought about by increases in temperature and nutrients predicted by the Intergovernmental Panel on Climate Change (IPCC) scenario for semi-arid regions. Methods: Two experiments were performed, one in the rainy season and another in the dry season. The nutrient enrichment was based on the annual mean values (August 2012-August 2013) of soluble reactive phosphorus and nitrate verified in the reservoir. The microcosms were exposed to two different temperatures, the five-year average of air temperature in the reservoir (control) and 4°C above the control temperature (warming). The experiment was conducted over 12 days; every three days water samples of approximately 60 mL in volume were taken from the reservoir for chemical and phytoplankton analysis. All species were classified by Reynolds Functional Groups (RFG). Results: The functional groups H1, X1, LO and S1 were the most representative in both seasons (rainy and dry). Our results showed that bloom-forming cyanobacteria, in particular the species of functional groups H1 and M, commonly reported in reservoirs in semi-arid regions of Brazil, were not significantly benefited by the warming and nutrient enrichment. The recruitment of other blue-green species, as well as diatoms and green algae, could be observed. Conclusions: The effects of warming and/or nutritional enrichment can change the structure of the phytoplankton community. However, as not expected as the pessimist scenario, in our study the bloom-forming phytoplankton functional groups did not show changes in relative biomass. Instead, the recruitment of diatoms and green algae currently found in enriched environments was verified, specifically in the rainy period, when nutrient dilution typically occurs
publishDate 2018
dc.date.issued.fl_str_mv 2018-11-14
dc.date.accessioned.fl_str_mv 2020-12-07T22:03:06Z
dc.date.available.fl_str_mv 2020-12-07T22:03:06Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
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dc.identifier.citation.fl_str_mv SOUZA, Maria da Conceição de; CROSSETTI, Luciane Oliveira; BECKER, Vanessa. Effects of temperature increase and nutrient enrichment on phytoplankton functional groups in a Brazilian semi-arid reservoir. Acta Limnologica Brasiliensia, [S.L.], v. 30, p. 215-224, 14 nov. 2018. FapUNIFESP (SciELO). Disponível em <https://www.scielo.br/scielo.php?script=sci_arttext&pid=S2318-03312018000100405&lng=en&tlng=en>. Acesso em 20 out 2020. http://dx.doi.org/10.1590/s2179-975x7517.
dc.identifier.uri.fl_str_mv https://repositorio.ufrn.br/handle/123456789/30886
dc.identifier.issn.none.fl_str_mv 2179-975X
dc.identifier.doi.none.fl_str_mv 10.1590/s2179-975x7517
identifier_str_mv SOUZA, Maria da Conceição de; CROSSETTI, Luciane Oliveira; BECKER, Vanessa. Effects of temperature increase and nutrient enrichment on phytoplankton functional groups in a Brazilian semi-arid reservoir. Acta Limnologica Brasiliensia, [S.L.], v. 30, p. 215-224, 14 nov. 2018. FapUNIFESP (SciELO). Disponível em <https://www.scielo.br/scielo.php?script=sci_arttext&pid=S2318-03312018000100405&lng=en&tlng=en>. Acesso em 20 out 2020. http://dx.doi.org/10.1590/s2179-975x7517.
2179-975X
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