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Status:
accepted
Title:
The effect of microclimate on wood decay is indirectly altered by tree species diversity in a litterbag study
Created at:
2016-02-17
Updated at:
2018-02-17
Envisaged journal:
Journal of Plant Ecology
Envisaged date:
2015-12-30
Rationale:
Aims: We studied the influence of tree species diversity on the dynamics of coarse wood decomposition in developing forest communities in a natural, topographically heterogeneous landscape. Using the litter bag technique we investigated how and to which extent canopy tree species richness or the exclusion of meso- and macroinvertebrates affected wood decomposition in the light of natural variations in the microclimate. We compared the relative importance of the two aspects (experimental treatment versus microclimate) on wood decay rates using Schima superba as a standard litter. Methods: Coarse woody debris (CWD) was deposited in litter bags with two different mesh sizes in a total of 134 plots along a gradient of canopy tree species richness (0 - 24 species). Wood decomposition was assessed at two consecutive time points, one and three years after deposition in the field. Local climatic conditions were assessed throughout the duration of the experiment. Microclimatic conditions were assessed both, directly in the field as well as indirectly via correlations with local topography. We used ANOVA based approaches to assess the relative importance of the treatments (community tree species richness and macro invertebrate exclusion) and microclimatic conditions on wood decay. Important findings: No direct influence of tree species richness on wood decay could be detected. However, the exclusion of macroinvertebrates significantly decreased wood decomposition rates. In addition, microclimatic conditions accounted for a substantial proportion of explained variance in the observed data. Here, wood decomposition was negatively affected by low mean temperatures and high variations in local humidity and temperature. However, tree species richness as well as the respective species composition affected the presence of termites within forest communities. These, in turn significantly increased the decay of CWD. The strength of both, experimental treatment and microclimate increased with ongoing decomposition. We conclude that, while tree species richness per-se has no direct influence wood decomposition, its influence on the local arthropod decomposer community (especially the presence of termites) does have an effect.
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Decomposcape (general): plot topography data, Main Experiment, Site A

Abstract:
For the “decomposcape” approach, a total of 4131 litter bags were filled with single-species litter of Osmanthus fragrans, Pinus massoniana and Schima superba, respectively. These bags have been fixed on the soil surface across both field sites. T...

Id: 445
Users: 3
Projects: 1
Datafiles: 3
Attachments: 0
Created at: 2013-10-25
Updated at: 2017-01-09

Decomposcape (general): plot topography data, Main Experiment, Site B

Abstract:
For the “decomposcape” approach, a total of 4131 litter bags were filled with single-species litter of Osmanthus fragrans, Pinus massoniana and Schima superba, respectively. These bags have been fixed on the soil surface across both field sites. T...

Id: 446
Users: 3
Projects: 1
Datafiles: 3
Attachments: 0
Created at: 2013-10-25
Updated at: 2017-01-09

Decomposcape (general): soil moisture data, Main experiment, Site A

Abstract:
For the “decomposcape” approach, a total of 4131 litter bags were filled with single-species litter of Osmanthus fragrans, Pinus massoniana and Schima superba, respectively. These bags have been fixed on the soil surface across both field sites. T...

Id: 443
Users: 3
Projects: 1
Datafiles: 2
Attachments: 0
Created at: 2013-10-24
Updated at: 2017-01-09

Decomposcape (general): soil moisture data, Main Experiment, Site B

Abstract:
For the “decomposcape” approach, a total of 4131 litter bags were filled with single-species litter of Osmanthus fragrans, Pinus massoniana and Schima superba, respectively. These bags have been fixed on the soil surface across both field sites. T...

Id: 444
Users: 3
Projects: 1
Datafiles: 2
Attachments: 0
Created at: 2013-10-24
Updated at: 2017-01-09

Decomposcape (wood): Stem disc data from undecomposed Schima superba

Abstract:
These data contain fresh and dry weight information of sample DISCS from harvest tress (Schima superba) unsed in the Ecoscape experiment. They are used as helper to calculate initial dry weight of the samples in the Ecoscape

Id: 356
Users: 2
Projects: 0
Datafiles: 1
Attachments: 0
Created at: 2013-06-13
Updated at: 2017-01-09
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