Diversity of phytoplankton community in different urban aquatic ecosystems in metropolitan João Pessoa, state of Paraíba, Brazil

Abstract

Aim:The aim of the present study was to identify which environmental factors affect the seasonal phytoplankton structure in different types of tropical aquatic ecosystems. Phytoplankton sampling was performed bi-monthly from August 2009 to June 2110 at three sites in the Solon de Lucena Lake, Jaguaribe River and Águas Minerais reservoir. Methods: The environmental variables were water temperature, transparency, depth, degree of infestation of aquatic macrophytes, air temperature, wind speed, solar radiation and precipitation. The phytoplankton community was studied in terms of richness, density, diversity and evenness. The data were treated with analysis of variance and canonical correspondence analysis. Results: Spatial variations in the data only occurred between ecosystems (p < 0.05). The reservoir and river exhibited typical phytoplankton of lotic environments, with a greater richness of Bacillariophyta (52.8% and 47.8%, respectively). The lake exhibited the typical richness lentic environments, with the greatest contribution from Chlorophyta (52.8%). This ecosystem was characterized by an absence of macrophytes, a low degree of water transparency (0.3 ± 0 m) and high algal density (89,903 ± 38,542 ind. mL -1 ), with a dominance of Aphanocapsa nubilum. In the river environment, the lesser diversity (0.64 ± 0.24 bit.ind -1 ) was associated to lesser richness (2.4 ± 0.5 spp.) and lesser evenness (0.39 ± 0.19) in comparison to the other ecosystems. The influence of macrophytes in the river and reservoir contributed toward the introduction of metaphytes and epiphytes in the phytoplankton, which was explained by the direct relationship between the density of these species and macrophytes. Conclusion: Thus, water transparency and macrophytes were the main factors related to fluctuations between the different aquatic ecosystems studied.Keywords: abiotic factors, aquatic macrophytes, phytoplankton, tropical water systems.Resumo: Objetivo: Este trabalho visou identificar que fatores ambientais interferem na estrutura sazonal fitoplanctônica em diferentes tipos de ecossistemas aquáticos tropicais. Coletas do fitoplâncton foram realizadas bimestralmente de agosto/2009 até junho/2010 em três pontos na lagoa Solon de Lucena, no rio Jaguaribe e no reservatório das Águas Minerais. Métodos: As variáveis ambientais utilizadas neste estudo foram temperatura e transparência da água, profundidade, níveis de infestação de macrófitas aquáticas, temperatura do ar, velocidade do vento, radiação solar e precipitação pluviométrica. A comunidade fitoplanctônica foi estudada em nível de riqueza, densidade, diversidade e equitatividade. Os dados foram tratados através de análise de variância e ACC. Resultados: A variação espacial dos dados foi observada apenas entre os ecossistemas (p < 0,05). O reservatório e o rio apresentaram fitoplâncton típico de ambientes lóticos com maior riqueza de Bacillariophyta (52,8% e 47,8%, respectivamente). Entretanto, a lagoa apresentou riqueza típica de ambientes lacustres com maior contribuiç...

Population And Diversity Of Phytoplankton On Ramadan In Situ Gintung ‎Lake, South Tangerang, Banten Province, Indonesia

“…The diversity of phytoplankton in the lake ecosystem has been reported of the previous studies (Napiórkowska-Krzebietke, 2009;Shanthala et al, 2009;da Costa & Dantas 2011;Carvalho et al, 2013;Borics et al, 2014), including of Situ Gintung lake (Kristiana, 2003). However, phytoplankton assemblages in Situ Gintung lake before, during and after Ramadan periods have not been reported.…”

Structure of phytoplankton functional groups in shallow lakes with different equilibrium states

“…Besides these factors, the CAA indicated that the composition and structure of the functional groups were closely related to the peculiar characteristics of both aquatic ecosystems and their equilibrium states. The influence of light availability on the mixing layer revealed how much water transparency and the level of infestation of submerged macrophytes exert a strong effect on the variation of algal biomass (COSTA & DANTAS, 2011) and on the composition of the functional groups, as observed for the groups T D and N, with affinity for permanently oligo-mesotrophic waters with slow flow and the presence of submerged macrophytes (PADISÁK et al, 2009). Also in this context, the depth of an ecosystem can exert a strong influence on the behavior of phytoplankton associations in tropical eutrophic reservoirs, due to the propensity to water column mixing (DANTAS et al, 2012).…”

Spatial and temporal dynamics of functional groups of phytoplankton in a tropical shallow lake

“…The presence of the macrophytes is highly relevant insofar as they promote an increase in spatial heterogeneity (Costa & Dantas, 2011; Table 2. Summary of the Canonic Correspondence Analysis showing correlation coefficients among the phytoplankton functional groups and the environmental variables of the Santa Lucia Lake for the period August 2014 to June 2015.…”