Seeing the wood despite the trees: Exploring human disturbance impact on plant diversity, community structure, and standing biomass in fragmented high Andean forests
Open Access
- 1 March 2021
- journal article
- research article
- Published by Wiley in Ecology and Evolution
- Vol. 11 (5), 2110-2172
- https://doi.org/10.1002/ece3.7182
Abstract
High Andean forests harbor a remarkably high biodiversity and play a key role in providing vital ecosystem services for neighboring cities and settlements. However, they are among the most fragmented and threatened ecosystems in the neotropics. To preserve their unique biodiversity, a deeper understanding of the effects of anthropogenic perturbations on them is urgently needed. Here, we characterized the plant communities of high Andean forest remnants in the hinterland of Bogota in 32 0.04 ha plots. We assessed the woody vegetation and sampled the understory and epiphytic cover. We gathered data on compositional and structural parameters and compiled a broad array of variables related to anthropogenic disturbance, ranging from local to landscape-wide metrics. We also assessed phylogenetic diversity and functional diversity. We employed nonmetric multidimensional scaling (NMDS) to select meaningful variables in a first step of the analysis. Then, we performed partial redundancy analysis (pRDA) and generalized linear models (GLMs) in order to test how selected environmental and anthropogenic variables are affecting the composition, diversity, and aboveground biomass of these forests. Identified woody vegetation and understory layer communities were characterized by differences in elevation, temperature, and relative humidity, but were also related to different levels of human influence. We found that the increase of human-related disturbance resulted in less phylogenetic diversity and in the phylogenetic clustering of the woody vegetation and in lower aboveground biomass (AGB) values. As to the understory, disturbance was associated with a higher diversity, jointly with a higher phylogenetic dispersion. The most relevant disturbance predictors identified here were as follows: edge effect, proximity of cattle, minimum fragment age, and median patch size. Interestingly, AGB was efficiently predicted by the proportion of late successional species. We therefore recommend the use of AGB and abundance of late successional species as indicators of human disturbance on high Andean forests.Funding Information
- Bundesministerium für Bildung und Forschung (01DN17006 ("ColBioDiv"))
This publication has 101 references indexed in Scilit:
- New handbook for standardised measurement of plant functional traits worldwideAustralian Journal of Botany, 2013
- Land Cover Change in Colombia: Surprising Forest Recovery Trends between 2001 and 2010PLOS ONE, 2012
- Impacts on the Deep-Sea Ecosystem by a Severe Coastal StormPLOS ONE, 2012
- Picante: R tools for integrating phylogenies and ecologyBioinformatics, 2010
- Phylogenetic structure of angiosperm communities during tropical forest successionProceedings. Biological sciences, 2009
- Re-evaluation of forest biomass carbon stocks and lessons from the world's most carbon-dense forestsProceedings of the National Academy of Sciences of the United States of America, 2009
- Towards a worldwide wood economics spectrumEcology Letters, 2009
- A simulation approach to determine statistical significance of species turnover peaks in a species‐rich tropical cloud forestDiversity and Distributions, 2007
- Rapid decay of tree-community composition in Amazonian forest fragmentsProceedings of the National Academy of Sciences of the United States of America, 2006
- Effects of Habitat Fragmentation on BiodiversityAnnual Review of Ecology, Evolution, and Systematics, 2003