Influence of land use and occupation on water quality and on the diatom community of reservoirs in northeast Brazil

IF 0.5 4区生物学 Q4 PLANT SCIENCES

Acta Biologica Colombiana Pub Date : 2022-02-23 DOI:10.15446/abc.v27n2.89391

Kelly Justin da Silva, J. Santos, M. Pereira, C. Machado, L. Barbosa

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Abstract

Historically, the reduction in water quality has been associated with changes in land use, especially changes in urbanization and expansion of agricultural frontiers. The objective of this study was to understand the characteristics of the diatomological community and the use and occupation of the soil around three reservoirs (Arara, Rio do Canto and Araçagi) and natural lagoon (Lagoa do Paó) (Northeast Brazil). Land use was determined using high spatial resolution satellite images. Abiotic variables of water and total phosphorus, organic matter and diatoms in surface sediments were analyzed. Abiotic variables and assemblages of diatoms were analyzed using Principal Component Analysis (PCA). Four types of land use have been identified, associated with anthropogenic change and intensive use of the landscape. The PCA separated the reservoirs by trophic status based on the total phosphorus in the water. 24 taxa of diatoms distributed in 12 genera and 10 families were identified in the sediment. Our results indicate the occurrence of planktonic, epiphytic and benthic diatoms adapted to different trophic gradients

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巴西东北部土地利用和占用对水库水质和硅藻群落的影响

从历史上看，水质的下降与土地利用的变化有关，特别是城市化和农业边界扩张的变化。本研究的目的是了解硅藻群落的特征，以及三个水库（Arara、Rio do Canto和Araçagi）和天然泻湖（Lagoa do Paó）（巴西东北部）周围土壤的使用和占用情况。土地利用是利用高空间分辨率卫星图像确定的。分析了表层沉积物中水和总磷、有机物和硅藻的非生物变量。利用主成分分析法对硅藻的非生物变量和组合进行了分析。已经确定了四种类型的土地利用，与人为变化和景观的集约利用有关。主成分分析根据水中总磷的营养状况对水库进行分离。沉积物中鉴定出硅藻24个类群，分布于10科12属。我们的研究结果表明，浮游、附生和底栖硅藻的出现适应了不同的营养梯度

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来源期刊

Acta Biologica Colombiana Agricultural and Biological Sciences-General Agricultural and Biological Sciences

CiteScore

1.60

自引率

0.00%

发文量

审稿时长

13 weeks

期刊介绍： The journal is published quarterly and divulges original and unpublished results of basic and applied research about biological subjects with special interest in Neotropical region. Manuscripts may be research articles, reviews, reflection articles or short notes. The Acta biol. Colomb Journal have a scientific and editorial board composed of expert researchers of in their areas of knowledge.