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How Does Landscape Structure Affect Dung Beetle Assemblages in Amazon Cities?
Vanessa Pontes Mesquita1, Glenda Vanessa Dos Santos Bernardino1, Paulo Estefano Dineli Bobrowiec1
1Programa de Pós-Graduação em Ecologia Instituto Nacional de Pesquisas da Amazônia Manaus Brazil.
Ecology and Evolution
|January 10, 2025
Summary
Urbanization significantly reduces native vegetation, impacting biodiversity. Forest cover loss is the primary driver, affecting species richness and abundance, while landscape configuration influences dung beetle populations in tropical cities.
Area of Science:
- Ecology
- Urban Ecology
- Conservation Biology
Background:
- Urbanization is a primary driver of native vegetation loss, impacting urban and natural ecosystems.
- Understanding landscape transformation is crucial for maintaining urban ecosystem health.
- Forest remnants within cities are vital habitats for biodiversity.
Purpose of the Study:
- To assess the impact of landscape structure variables on dung beetle assemblages and functional groups.
- To investigate the effects of urbanization along an urban-rural gradient in Central Amazonia.
- To determine how forest cover and configuration influence dung beetle diversity.
Main Methods:
- Sampling of dung beetle assemblages across 38 sites along an urban-rural gradient.
- Analysis of landscape structure variables including forest cover, agricultural area, edge density, and forest patch number.
- Assessment of dung beetle functional groups based on diet and resource removal strategies.
Main Results:
- Forest cover loss was the most significant factor, negatively impacting dung beetle species richness, abundance, and body size.
- Increased agricultural area negatively affected dung beetle abundance.
- Edge density positively correlated with dung beetle abundance, while forest patch number influenced abundance (except for dweller species) and body size of generalist species.
Conclusions:
- Urbanization-driven ecological changes are primarily caused by forest cover loss.
- Forest configuration plays a significant role in maintaining dung beetle abundance in urban landscapes.
- This study highlights the importance of forest cover amount and distribution for taxonomic diversity of dung beetles in tropical cities.
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