scholarly journals Soil macrofauna density and diversity across a chronosequence of tropical forest restoration in Southeastern Brazil

2017 ◽  
Vol 78 (3) ◽  
pp. 449-456 ◽  
Author(s):  
N. T. Amazonas ◽  
R. A. G. Viani ◽  
M. G. A. Rego ◽  
F. F. Camargo ◽  
R. T. Fujihara ◽  
...  

Abstract Edaphic macrofauna must be better studied if we want to take advantage of their full potential for the restoration of tropical ecosystems. We investigated changes in edaphic macrofauna density and diversity along a secondary succession chronosequence in the Atlantic Forest. Our results show some clear patterns of change in soil macrofauna along the chronosequence. Density did not increase along secondary succession, but was correlated with canopy cover. Diversity was characterized by high dominance of social insects and evenness among other groups. We conclude soil macrofauna has a high capacity to recolonize young forests and that its recovery is considerably fast compared to other ecosystem transformations.

Author(s):  
Leland K. Werden ◽  
Karen D. Holl ◽  
Jose Miguel Chaves‐Fallas ◽  
Federico Oviedo‐Brenes ◽  
Juan Abel Rosales ◽  
...  

2016 ◽  
Vol 381 ◽  
pp. 209-216 ◽  
Author(s):  
Tom Swinfield ◽  
Roki Afriandi ◽  
Ferry Antoni ◽  
Rhett D. Harrison

2021 ◽  
Author(s):  
Lauren Nerfa ◽  
Sarah Jane Wilson ◽  
J. Leighton Reid ◽  
Jeanine M. Rhemtulla

Ecology ◽  
1994 ◽  
Vol 75 (8) ◽  
pp. 2467
Author(s):  
F. E. Putz ◽  
Helmut Lieth ◽  
Martina Lohmann

2018 ◽  
Vol 22 (1) ◽  
pp. 34-44 ◽  
Author(s):  
T. Trevor Caughlin ◽  
Marinés Peña‐Domene ◽  
Cristina Martínez‐Garza

2019 ◽  
Vol 28 (7) ◽  
pp. 495 ◽  
Author(s):  
Jamie M. Lydersen ◽  
Brandon M. Collins ◽  
Carolyn T. Hunsaker

Forest restoration treatments seek to increase resilience to wildfire and a changing climate while avoiding negative impacts to the ecosystem. The extent and intensity of treatments are often constrained by operational considerations and concerns over uncertainty in the trade-offs of addressing different management goals. The recent (2012–15) extreme drought in California, USA, resulted in widespread tree mortality, particularly in the southern Sierra Nevada, and provided an opportunity to assess the effects of restoration treatments on forest resilience to drought. We assessed changes in mixed-conifer forest structure following thinning and understorey burning at the Kings River Experimental Watersheds in the southern Sierra Nevada, and how treatments, topography and forest structure related to tree mortality in the recent drought. Treatments had negligible effect on basal area, tree density and canopy cover. Following the recent drought, average basal area mortality within the watersheds ranged from 5 to 26% across riparian areas and 12 to 44% across upland areas, with a range of 0 to 95% across all plots. Tree mortality was not significantly influenced by restoration treatments or topography. Our results suggest that the constraints common to many restoration treatments may limit their ability to mitigate the impacts of severe drought.


2016 ◽  
Vol 28 (0) ◽  
Author(s):  
Gabriela Santos Tibúrcio ◽  
Carolina da Silva Carvalho ◽  
Fabio Cop Ferreira ◽  
Roberto Goitein ◽  
Milton Cezar Ribeiro

Abstract Objective In this study we aimed to understand how extrinsic environmental factors measured in the watercourses and the surrounding landscape influence the ichthyofauna of first-order streams. Methods Data were collected within the Corumbataí River Basin, São Paulo, southeastern Brazil, during the dry season of 2012. We sampled the ichthyofauna in 13 stretches of streams distributed across four river sub-basins. The stretches differed in relation to the presence/absence of riparian forest, the predominant type of matrix and the percentage of forest. Response variables were species richness and the occurrence of functional groups and explanatory variables include both local and landscape structures from the surrounding environment. Local variables comprised the following water quality and structural attributes: pH, temperature, conductivity, turbidity, flow rate, depth, width, type of substrate. Landscape variables included presence/absence of riparian vegetation, type of vegetation, type of matrix, percentage of forest and canopy cover. Results A total of 268 individuals were recorded, which were distributed among 12 species. The landscape structure influenced the occurrence of functional groups in first-order streams, especially allochthonous-feeders, nektonic and hypoxia-intolerant species. The presence of riparian forest was the most important predictor. Species richness was negatively related to the presence of riparian vegetation, supporting the hypothesis that degraded landscapes lead to a reduction in diversity. Conclusion The protection of riparian vegetation is critical to the maintenance of ichthyofauna diversity in first-order streams. The presence or absence of riparian vegetation differently affected the occurrence of species depending on their functional characteristics, particularly those related to the tolerance to hypoxia, source of alimentary items and the position in the water column.


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