Relação entre uso do solo e composição de insetos aquáticos de quatro bacias hidrográficas do Estado de São Paulo

Sonoda, K. C.; Vettorazzi, Carlos Alberto; Ortega, Edwin M. M.

doi:10.4013/nbc.2011.63.06

Cited by 2 publications

(1 citation statement)

References 21 publications

(30 reference statements)

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“…Fish species with nektonic and benthic habits require external resources (Teresa and Carvalho, 2008), as evidenced by the presence of adult terrestrial insects as well as riparian plant fragments found in stomach contents in this study. Therefore, a well-structured riparian forest is capable of protecting the water environment and preserving water quality (Sonoda et al, 2011;Lobón-Cerviá et al, 2016), including providing allocthonous organic matter which serves as food as well as shelter and habitat for aquatic species (Casatti et al, 2009).…”

Section: Discussionmentioning

confidence: 99%

Food Resource Sharing Among Benthic and Nektonic Stream Fish Species

Silva

Cetra

2021

Bol. Inst. Pesca

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Several tropical freshwater fish species are generally generalistic feeders, sometimes followed by a diet reduction during the period of decreased resource availability. This study aimed to analyze the dietary overlap between nektonic and benthic fish species. The stomachs of 82 obligatory nektonics and 52 benthic were removed. The diet composition for each individual was determined based on the analysis of the stomach content, and the contents were grouped into 11 categories. For the analysis of food items, the method of degree of food preference was used. To verify the niche overlap between benthic and nectonic, the Pianka index was applied. Benthic species consumed items across all 11 food categories and nektonic species consumed nine. The diet composition of species with nektonic and benthic habits showed a significant difference. Dietary overlapping suggests a supply of the same resources, as they are shared by both groups. The high concentration of water insect larvae in the food content of all sampled fish species, regardless of the position in the water column, shows the importance of insects in the water ecosystems. The composition of ecosystem diets is helpful towards understanding the community structure and can explain the coexistence between different fish’s groups where live in different micro-habitats and how tactics used to capture food which may minimize the effects of overlapping and competitive exclusion.

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Section: Discussionmentioning

confidence: 99%

Food Resource Sharing Among Benthic and Nektonic Stream Fish Species

Silva

Cetra

2021

Bol. Inst. Pesca

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Spatial and Environmental Influence on the Community of Aquatic Insects in Atlantic Forest Streams

Souza,

Da Silva,

Campiolo

2023

RGSA

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Purpose: Investigate the influence of environmental variables and spatial autocorrelation on aquatic insect communities within the same water flow in Atlantic Forest streams. Theoretical framework: The organisms in lotic environments are influenced by both local and non-local factors, in addition to other processes, which result from the dynamics of the environment. Alterations in these factors can provide evidence regarding the organization of aquatic communities. Given the high sensitivity insect are used in ecosystems quality studies around the world. Method: Sampling campaigns were conducted every three months. A total of twenty-four samples were collected across four campaigns and six collection sites were established along the same stream. In-situ measurements of physical and chemical variables were performed. The environmental quality of the surroundings was assessed using the Habitat Integrity Index. Results and conclusion: No spatial dependence was found between the sampling sites. Closer points no longer exhibited resemblance. For the studied situation, the surrounding and turbidity have a stronger relationship with the biota, acting as environmental filters and suggesting that the organization of is driven by local environmental conditions. Environments that are locally less disturbed are more influential in shaping for aquatic insect communities. Thus, considering the effect of habitats on organisms and recognizing the importance of local conservation efforts for preserving the aquatic biodiversity of the Atlantic Forest biome, we emphasize need for the implementation permanent monitoring programs in hydrographic basins, mainly for the BHRA, and the development of strategies aimed at minimizing the impacts on these environments. Research implications: We affirm the applicability of aquatic insects as valuable indicators for assessing the quality and biodiversity of streams and suggest studies with these organisms as a strategy to support management in freshwater environments. Originality/value: Studies that evaluate water bodies and their surroundings are essential in view of the pressures exerted through the different land uses. The study region deserves attention in view of the implementation of large constructions.

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Relação entre uso do solo e composição de insetos aquáticos de quatro bacias hidrográficas do Estado de São Paulo

Cited by 2 publications

References 21 publications

Food Resource Sharing Among Benthic and Nektonic Stream Fish Species

Food Resource Sharing Among Benthic and Nektonic Stream Fish Species

Spatial and Environmental Influence on the Community of Aquatic Insects in Atlantic Forest Streams

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