MICROALGAS PLANCTÔNICAS EM DOIS LAGOS DE PESQUE-PAGUE EM CRATO – CE
MICROALGAS PLANCTÔNICAS EM DOIS LAGOS DE PESQUE-PAGUE EM CRATO – CE
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DOI: 10.22533/at.ed.9752325095
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Palavras-chave: Pesqueiro, Fitoplâncton, Quinta dos Lobos, Chlorophyceae
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Keywords: Fishing spot, Phytoplankton, Quinta dos Lobos, Chlorophyceae
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Abstract: Fishing ponds or fishing spots are recreational environments where a category of sport fishing is practiced. They are usually located near urban centers, reliant on water quality and quantity, and are composed of various groups of organisms, including planktonic microalgae (phytoplankton), which hold significant importance in maintaining aquatic life as they form the base of the food chain and the primary source of oxygen. Thus, the objective of this study was to identify the composition and structure of the planktonic microalgae community in two lakes situated at Quinta dos Lobos Fishing Pond, Crato-CE, during different periods (rainy and post-rainy). Samples were collected monthly from March/17 to August/17. For the assessment of planktonic microalgae community composition, horizontal tows were conducted using a plankton net (20 µm), and the samples were fixed with 4% formaldehyde. Qualitative analysis was performed using a Motic BA310 optical microscope coupled with a photographic camera and specialized literature. Species richness, relative abundance, occurrence frequency, diversity, and evenness indices were determined. For the analysis of physicochemical variables, Van Dorn bottles were used to collect subsurface water from the lakes, and a HANNA probe was employed. A total of 96 species were identified, distributed across five taxonomic classes: Cyanophyceae, Chlorophyceae, Bacillariophyceae, Euglenophyceae, and Zygnemaphyceae. Chlorophyceae exhibited the highest species richness, followed by Euglenophyceae and Cyanophyceae. Among the species, five were highly frequent, 16 were frequent, 41 were less frequent, and 34 were rare. The planktonic microalgae community showed high diversity in L1, while L2 exhibited moderate diversity; both lakes demonstrated uniform distribution of species. This study is one of the few conducted in the Northeast Region and holds significant importance, as it contributes to understanding the diversity of planktonic microalgae species in fishing pond lakes in the state of Ceará
- Maraiza Gregorio de Oliveira
- Joice Layanne Guimarães Rodrigues
- Márcia Taíza Pereira da Cruz
- José Weverton Almeida Bezerra
- Karolyna Pereira Martins
- Raquel Furtado dos Santos Moura
- José Thyálisson da Costa Silva
- Cícero dos Santos Leandro
- Maria Ivaneide Rocha
- Ademar Maia Filho
- Maria Irismã Libório Góes
- Sírleis Rodrigues Lacerda