Role of submerged macrophytes in sediment phosphorus stabilization in shallow lakes from the Brazilian semiarid region

Barbosa, Luciana Gomes; Alves, Rafael Machado de Araújo; Santos, João Paulo de Oliveira; Araújo, Maria Cristina Santos Pereira de; Dantas, Ênio Wocyli

doi:10.1080/20442041.2020.1814090

Cited by 8 publications

(4 citation statements)

References 65 publications

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“…According to Scheffer & Van Nes (2007), a comprehensive survey of shallow lakes worldwide revealed that water turbidity increased with eutrophication due to phytoplankton growth. From this perspective, the Lagoa do Paó reservoir exhibited a robust correlation between alkalinity, limited subaquatic light, water temperature, and high P concentrations with the flourishing of filamentous cyanobacteria (Barbosa et al, 2020).…”

Section: Discussionmentioning

confidence: 99%

“…A research carried out at Lago Paó reservoir highlighted the total absence of macrophytes over a year of evaluation, with the phytoplankton biomass being dominated by filamentous cyanobacteria (Barbosa et al, 2020). The authors identified a significant correlation between this reservoir and the light attenuation coefficient (lower transparency), the concentration of soluble reactive phosphorus, alkaline pH, nitrogen-fixing cyanobacteria, cyanobacteria typical of turbid environments, and cyanobacterial blooms in shallow and eutrophic lakes.…”

Section: Discussionmentioning

confidence: 99%

“…The PCA revealed that the water pH in this reservoir is strongly correlated to the electrical conductivity, the total P levels, and the orthophosphate content. Allied with the high turbidity resulting from the resuspension of sediments by the action of wind and/or the reduction in macrophyte coverage, these conditions favor phytoplankton development (Scheffer & Van Nes, 2007;Barbosa et al, 2020). In addition, the continuous cyanobacterial blooms probably increased the CO 2 demand for photosynthesis, decreasing the free levels of atmospheric CO 2 and consequently increasing the pH of the reservoir (Paerl & Huisman, 2009).…”

Section: Discussionmentioning

confidence: 99%

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Seasonal precipitation and anthropogenic pressure affect the water quality of reservoirs in the highland humid forest enclaves

Barbosa,

Carneiro,

Moro

et al. 2023

Acta Limnol. Bras.

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Aim Humid forest enclaves are areas with privileged rainfall patterns compared to the surrounding regions, which favours their use for human settlement and agricultural activities, actions that promote severe transformations of the landscape and can contribute to the degradation of local water resources. From this perspective, given the great importance of water reservoirs for this region and the high demand for water, this study aimed to analyse the conservation status of water quality in reservoirs subjected to different anthropic disturbance in a humid forest enclave in the State of Paraíba, Brazil. Methods Sampling campaigns were carried out for one year in six reservoirs: Mazagão I, Mazagão II, Vaca Brava, Saulo Maia, Rio do Canto and Lagoa do Paó, to measure the physic-chemical variables of the water. Results The influence of annual rainfall patterns on the capacity of these ecosystems to respond to anthropic pressures, indicating the effects of seasonality in the Lagoa do Paó reservoir. For the Vaca Brava, the low accumulated water volumes turned out to be more critical for changes in water quality than the use and occupation of the margins of this reservoir. Furthermore, the Mazagão I and II reservoirs showed low electrical conductivity. The Saulo Maia reservoir exhibit clear waters with low phosphorus content and can be used as a reference for a preserved environment for a highland humid forest enclave. Conclusions The conservation of the reservoir environment in the highland humid forest enclave is not sufficient to guarantee the water quality, as it is concentrated an affected at a certain time of the year. These aquatic ecosystems are under great pressure and the lack of decisions based on technical criteria makes them vulnerable to eutrophication.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

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Seasonal precipitation and anthropogenic pressure affect the water quality of reservoirs in the highland humid forest enclaves

Barbosa,

Carneiro,

Moro

et al. 2023

Acta Limnol. Bras.

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“…These models predict that changes in the abiotic components would have little effect until a nutrient threshold is reached, represented by a rapid and potentially irreversible transition in the trophic structure and resilience of the system (Scheffer and Carpenter 2003). Barbosa et al (2020) assessed the effects of allochthonous disturbances on phosphorus release in 2 shallow lakes by constructing models using partial least squares path modeling. Those models indicated that the submerged macrophyte cover acted as a stabilizing force, reducing the phosphorus released from the sediments and preventing shifts between the stable states.…”

Section: Development Of Predictive Modelsmentioning

confidence: 99%

Advances in limnological research in Earth's drylands

et al. 2020

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Drought is an important driver of change in aquatic ecosystems and generally acts as a filter to select biological traits capable of persisting under severe environmental circumstances. Drylands are highly vulnerable to climate change and increases in climate variability. Consequently, an increase in the processes of eutrophication, salinization, and habitat desiccation may be observed in response to the loss of the hydrological connectivity. The International Network on Limnology of Drylands (INLD) was created with the overall goal of understanding the functioning and conservation status of aquatic ecosystems in drylands globally. INLD was made official in 2016 through the International Society of Limnology. Its objectives are to (1) assess the current state of biological diversity in dryland aquatic ecosystems, (2) evaluate the multiple environmental stressors acting in drylands, and (3) develop models to predict effects of global change on drylands. This special issue, Limnology of Drylands, consists of 10 manuscripts focused on the effects of environmental pressures, including global warming, on the biodiversity and distribution of aquatic communities in drylands.

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Climate features or the composition of submerged vegetation? Which factor has a greater impact on the phytoplankton structure in temperate lakes?

Pełechata

Kufel

Pukacz

et al. 2023

Ecological Indicators

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Role of submerged macrophytes in sediment phosphorus stabilization in shallow lakes from the Brazilian semiarid region

Cited by 8 publications

References 65 publications

Seasonal precipitation and anthropogenic pressure affect the water quality of reservoirs in the highland humid forest enclaves

Seasonal precipitation and anthropogenic pressure affect the water quality of reservoirs in the highland humid forest enclaves

Advances in limnological research in Earth's drylands

Climate features or the composition of submerged vegetation? Which factor has a greater impact on the phytoplankton structure in temperate lakes?

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