Limits...
Variegated tropical landscapes conserve diverse dung beetle communities

View Article: PubMed Central - HTML - PubMed

ABSTRACT

Background: Conserving biodiversity in tropical landscapes is a major challenge to scientists and conservationists. Current rates of deforestation, fragmentation, and land use intensification are producing variegated landscapes with undetermined values for the conservation of biological communities and ecosystem functioning. Here, we investigate the importance of tropical variegated landscapes to biodiversity conservation, using dung beetle as focal taxa.

Methods: The study was carried out in 12 variegated landscapes where dung beetles were sampled using six pitfall traps, 30 m apart from each other, along a transect in each studied landscape use and cover classes—LUCC (forest fragment and corridor, coffee plantation, and pasture). We baited each pitfall trap with 30 g of human feces and left open for a 48 h period. We also measured three environmental variables reflecting structural differences among the studied classes: canopy cover, local vegetation heterogeneity and soil sand content.

Results: We collected 52 species and 2,695 individuals of dung beetles. We observed significant differences in the mean species richness, abundance and biomass among classes, with forest fragments presenting the highest values, forest corridors and coffee plantations presenting intermediate values, and pastures the lowest values. Regarding community structure, we also found significant differences among classes. Canopy cover was the only variable explaining variation in dung beetle species richness, abundance, biomass, and community structure. The relative importance of spatial turnover was greater than nestedness-resultant component in all studied landscapes.

Discussion: This study evaluated the ecological patterns of dung beetle communities in variegated tropical landscapes highlighting the importance of these landscapes for conservation of tropical biodiversity. However, we encourage variegation for the management of landscapes that have already been fragmented or as a complementary initiative of current conservation practices (e.g., protection of natural habitats and establishment of reserves).

No MeSH data available.


Results from decomposition of dung beetle beta diversity in four land use and cover classes at 12 variegated landscapes in Lavras— MG, Brazil.Grey bars represent spatial turnover component proportion (βSIM∕βSOR), white bars represent nestedness-resultant component proportion (βSNE∕βSOR), and black dots represent overall values of beta diversity (βSNE + βSIM) in each landscape.
© Copyright Policy
Related In: Results  -  Collection

License
getmorefigures.php?uid=PMC5382926&req=5

fig-5: Results from decomposition of dung beetle beta diversity in four land use and cover classes at 12 variegated landscapes in Lavras— MG, Brazil.Grey bars represent spatial turnover component proportion (βSIM∕βSOR), white bars represent nestedness-resultant component proportion (βSNE∕βSOR), and black dots represent overall values of beta diversity (βSNE + βSIM) in each landscape.

Mentions: In the variegated landscapes studied, the decomposition of beta diversity revealed that the main process driving beta diversity in these landscapes was spatial turnover, with βratio <0.5 in all landscapes (Fig. 5).


Variegated tropical landscapes conserve diverse dung beetle communities
Results from decomposition of dung beetle beta diversity in four land use and cover classes at 12 variegated landscapes in Lavras— MG, Brazil.Grey bars represent spatial turnover component proportion (βSIM∕βSOR), white bars represent nestedness-resultant component proportion (βSNE∕βSOR), and black dots represent overall values of beta diversity (βSNE + βSIM) in each landscape.
© Copyright Policy
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC5382926&req=5

fig-5: Results from decomposition of dung beetle beta diversity in four land use and cover classes at 12 variegated landscapes in Lavras— MG, Brazil.Grey bars represent spatial turnover component proportion (βSIM∕βSOR), white bars represent nestedness-resultant component proportion (βSNE∕βSOR), and black dots represent overall values of beta diversity (βSNE + βSIM) in each landscape.
Mentions: In the variegated landscapes studied, the decomposition of beta diversity revealed that the main process driving beta diversity in these landscapes was spatial turnover, with βratio <0.5 in all landscapes (Fig. 5).

View Article: PubMed Central - HTML - PubMed

ABSTRACT

Background: Conserving biodiversity in tropical landscapes is a major challenge to scientists and conservationists. Current rates of deforestation, fragmentation, and land use intensification are producing variegated landscapes with undetermined values for the conservation of biological communities and ecosystem functioning. Here, we investigate the importance of tropical variegated landscapes to biodiversity conservation, using dung beetle as focal taxa.

Methods: The study was carried out in 12 variegated landscapes where dung beetles were sampled using six pitfall traps, 30 m apart from each other, along a transect in each studied landscape use and cover classes&mdash;LUCC (forest fragment and corridor, coffee plantation, and pasture). We baited each pitfall trap with 30 g of human feces and left open for a 48 h period. We also measured three environmental variables reflecting structural differences among the studied classes: canopy cover, local vegetation heterogeneity and soil sand content.

Results: We collected 52 species and 2,695 individuals of dung beetles. We observed significant differences in the mean species richness, abundance and biomass among classes, with forest fragments presenting the highest values, forest corridors and coffee plantations presenting intermediate values, and pastures the lowest values. Regarding community structure, we also found significant differences among classes. Canopy cover was the only variable explaining variation in dung beetle species richness, abundance, biomass, and community structure. The relative importance of spatial turnover was greater than nestedness-resultant component in all studied landscapes.

Discussion: This study evaluated the ecological patterns of dung beetle communities in variegated tropical landscapes highlighting the importance of these landscapes for conservation of tropical biodiversity. However, we encourage variegation for the management of landscapes that have already been fragmented or as a complementary initiative of current conservation practices (e.g., protection of natural habitats and establishment of reserves).

No MeSH data available.