Unravelling the influence of cattle stocking rate on the macroinvertebrate community of freshwater wetlands subjected to hydrological modifications in three hydroclimatic periods
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View abstract on PubMed
Summary
This summary is machine-generated.Cattle overstocking harms freshwater macroinvertebrates in the Paraná River Delta, reducing biodiversity and ecosystem function. Hydrological changes and drought worsen these impacts, threatening wetland health.
Area Of Science
- Ecology
- Environmental Science
- Wetland Ecology
Background
- The Paraná River Delta's wetlands face threats from climate change and human activities, particularly livestock intensification.
- Macroinvertebrates are crucial for wetland health but are vulnerable to cattle-induced water quality degradation and habitat alteration.
Purpose Of The Study
- To analyze the impact of cattle stocking rates on macroinvertebrate communities in freshwater marshes.
- To compare these effects in natural versus modified marshes and across different hydrometeorological periods (drier, humid, extreme drought).
Main Methods
- Sampling in 16 freshwater habitats, measuring environmental variables (pH, nutrients, etc.) and macroinvertebrate community structure.
- Statistical analyses including ANOVA, Kruskal-Wallis, RDA, PERMANOVA, and SIMPER to assess impacts of stocking rates, hydrological modifications, and drought.
Main Results
- High cattle stocking rates significantly altered macroinvertebrate community structure, decreasing density, taxonomic, and functional richness.
- Hydrological alterations amplified the negative effects of overstocking.
- Severe drought conditions favored only tolerant macroinvertebrate species under overstocking.
Conclusions
- Cattle overstocking poses ecological risks to freshwater marshes in the Paraná River Delta.
- Controlling cattle stocking rates, especially during extreme droughts, is crucial to prevent loss of ecological functions and biodiversity.
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