Leaf-litter breakdown in urban streams of Central Amazonia: direct and indirect effects of physical, chemical, and biological factors

2015 ◽  
Vol 34 (2) ◽  
pp. 716-726 ◽  
Author(s):  
Renato T. Martins ◽  
Adriano S. Melo ◽  
José F. Gonçalves ◽  
Neusa Hamada
Keyword(s):  
Leaf Litter ◽  
Indirect Effects ◽  
Urban Streams ◽  
Direct And Indirect Effects ◽  
Biological Factors ◽  
Litter Breakdown ◽  
Leaf Litter Breakdown ◽  
Physical Chemical ◽  
Central Amazonia

New methods for the investigation of leaf litter breakdown in river sediments

Hydrobiologia ◽  
2012 ◽  
Vol 700 (1) ◽  
pp. 301-312 ◽  
Author(s):  
Simon Navel ◽  
Christophe Piscart ◽  
Florian Mermillod-Blondin ◽  
Pierre Marmonier
Keyword(s):  
Leaf Litter ◽  
River Sediments ◽  
Litter Breakdown ◽  
Leaf Litter Breakdown ◽  
New Methods

scholarly journals Present Effects of Past Wildfires on Leaf Litter Breakdown in Stream Ecosystems

2010 ◽  
Vol 70 (2) ◽  
pp. 164-174 ◽  
Author(s):  
Peter Koetsier ◽  
Teresa R. B. Krause ◽  
Quenton M. Tuckett
Keyword(s):  
Leaf Litter ◽  
Stream Ecosystems ◽  
Litter Breakdown ◽  
Leaf Litter Breakdown

scholarly journals Geographic distance and vegetation structure rather than river barrier drive ant beta diversity across Central Amazonia

2021 ◽  
Author(s):  
Diego Rodrigues Guilherme ◽  
Pedro Aurélio Costa Lima Pequeno ◽  
Fabrício Beggiato Baccaro ◽  
Elizabeth Franklin ◽  
Cláudio Rabelo dos Santos Neto ◽  
...  
Keyword(s):  
Indirect Effects ◽  
Vegetation Structure ◽  
Beta Diversity ◽  
Amazon Basin ◽  
Isolation By Distance ◽  
Geographic Distance ◽  
Effect Of Temperature ◽  
Detectable Effect ◽  
Direct And Indirect Effects ◽  
Central Amazonia

Abstract To understand better the effects of niche and neutral processes is important to disentangle the direct and indirect effects of each process, mainly if the environmental factors are geographically structured neglecting important indirect and synergic effects. We sampled ground-dwelling ant species on 126 plots distributed across eight sampling sites along a broad environmental gradient in Central Amazonia. Structural equation modelling was employed to quantify direct and indirect effects of geographic distance, the Amazon River’s opposite margins, and environmental differences in temperature, precipitation and vegetation structure (Normalized Difference Vegetation Index) on ant beta diversity (Jaccard’s dissimilarity). We found that geographic distance and NDVI differences had major direct effects on ant beta diversity. The major effect of temperature was indirect through NDVI, whereas precipitation had no detectable effect on beta diversity. The Amazon River had a weak influence on the ant composition dissimilarity. Our results challenge the major role often ascribed to riverine barriers in the diversification and distribution of Amazonian biota. Rather, ant compositional dissimilarity seems to be mainly driven by a combination of dispersal limitation and selection imposed by vegetation features and, indirectly, by temperature. We suggest that as NDVI differences decrease with geographic distance in the region, isolation by distance may have favoured phenotypic convergence between ant communities in the northern and southern borders of the Amazon Basin.

Leaf-Litter Breakdown

2017 ◽  
pp. 71-82 ◽  
Author(s):  
E.F. Benfield ◽  
Ken M. Fritz ◽  
Scott D. Tiegs
Keyword(s):  
Leaf Litter ◽  
Litter Breakdown ◽  
Leaf Litter Breakdown
Sign in / Sign up

Export Citation Format

Share Document