leaf litter processing
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Ecosystems ◽  
2019 ◽  
Vol 23 (5) ◽  
pp. 989-1003 ◽  
Author(s):  
Juanita Mora-Gómez ◽  
Dani Boix ◽  
Sofia Duarte ◽  
Fernanda Cássio ◽  
Cláudia Pascoal ◽  
...  

2018 ◽  
Author(s):  
Chelsea J. Little ◽  
Emanuel A. Fronhofer ◽  
Florian Altermatt

AbstractA major focus of ecology is to understand and predict ecosystem function across scales. Many ecosystem functions are only measured at local scales, while their effects occur at a landscape level. Here, we investigate how landscape-scale predictions of ecosystem function depend on intraspecific competition, a fine-scale process, by manipulating intraspecific density of shredding macroinvertebrates and examining effects on leaf litter decomposition, a key function in freshwater ecosystems. Across two species, we found that leaf processing rates declined with increasing density following a negative exponential function, likely due to interference competition. To demonstrate consequences of this nonlinearity, we upscaled estimates of leaf litter processing from shredder abundance surveys in 10 replicated headwater streams. In accordance with Jensen’s inequality, applying density-dependent consumption rates reduced estimates of catchment-scale leaf consumption up to 60-fold versus using density-independent rates. Density-dependent consumption estimates aligned closely with metabolic requirements in catchments with large, but not small, shredder populations. Importantly, shredder abundance was not limited by leaf litter availability and catchment-level leaf litter supply was much higher than estimated consumption, thus leaf litter processing was not limited by resource supply. Our work highlights the need for upscaling which accounts for intraspecific interactions.


Hydrobiologia ◽  
2018 ◽  
Vol 819 (1) ◽  
pp. 67-75 ◽  
Author(s):  
Francisco Carvalho ◽  
Cláudia Pascoal ◽  
Fernanda Cássio ◽  
Ronaldo Sousa

2017 ◽  
Vol 62 (10) ◽  
pp. 1741-1755 ◽  
Author(s):  
Brian Four ◽  
Marielle Thomas ◽  
Evelyne Arce ◽  
Aurélie Cébron ◽  
Michael Danger ◽  
...  

2015 ◽  
Vol 40 (6) ◽  
pp. 693-700 ◽  
Author(s):  
Renan de Souza Rezende ◽  
Gustavo Figueiredo Marques Leite ◽  
Anderson Kennedy Soares De-Lima ◽  
Luis Antonio Braga Da Silva Filho ◽  
Camila Vilarinho Costa Chaves ◽  
...  

2015 ◽  
Vol 503-504 ◽  
pp. 251-257 ◽  
Author(s):  
Aingeru Martínez ◽  
Javier Pérez ◽  
Jon Molinero ◽  
Mikel Sagarduy ◽  
Jesús Pozo

2014 ◽  
Vol 186 ◽  
pp. 67-74 ◽  
Author(s):  
Hugues Clivot ◽  
Faustine Charmasson ◽  
Vincent Felten ◽  
Jean-Pierre Boudot ◽  
François Guérold ◽  
...  

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