Title
Past human disturbance effects upon biodiversity are greatest in the canopy; A case study on rainforest butterflies
Date Issued
01 March 2016
Access level
open access
Resource Type
journal article
Author(s)
Publisher(s)
Public Library of Science
Abstract
A key part of tropical forest spatial complexity is the vertical stratification of biodiversity, with widely differing communities found in higher rainforest strata compared to terrestrial levels. Despite this, our understanding of how human disturbance may differentially affect biodiversity across vertical strata of tropical forests has been slow to develop. For the first time, how the patterns of current biodiversity vary between three vertical strata within a single forest, subject to three different types of historic anthropogenic disturbance, was directly assessed. In total, 229 species of butterfly were detected, with a total of 5219 individual records. Butterfly species richness, species diversity, abundance and community evenness differed markedly between vertical strata. We show for the first time, for any group of rainforest biodiversity, that different vertical strata within the same rainforest, responded differently in areas with different historic human disturbance. Differences were most notable within the canopy. Regenerating forest following complete clearance had 47% lower canopy species richness than regenerating forest that was once selectively logged, while the reduction in the mid-storey was 33% and at ground level, 30%. These results also show for the first time that even long term regeneration (over the course of 30 years) may be insufficient to erase differences in biodiversity linked to different types of human disturbance. We argue, along with other studies, that ignoring the potential for more pronounced effects of disturbance on canopy fauna, could lead to the underestimation of the effects of habitat disturbance on biodiversity, and thus the overestimation of the conservation value of regenerating forests more generally.
Volume
11
Issue
3
Language
English
OCDE Knowledge area
Ciencias del medio ambiente
Scopus EID
2-s2.0-84961193031
PubMed ID
Source
PLoS ONE
Resource of which it is part
PLoS ONE
Source funding
University of Glasgow
Sponsor(s)
We first of all thank the Crees Foundation ( www.crees-manu.org ) and its director Quinn Meyer for supporting this research as part of their conservation and biodiversity monitoring programme, and also the University of Glasgow for supporting field work conducted at the Manu Learning Centre. We gratefully acknowledge the financial support and encouragement of the TJMF Foundation, who provided crucial support for this work through their Amazon Research Programme grant to the University of Glasgow. Thanks to the Darwin Initiative for financial support of the Sustainable Manu project, a collaborative initiative between the Crees Foundation and The University of Glasgow that supported this research. Thanks to Laura Dominie Braunholtz and Lawrence Whittaker for putting together the identification guide and for working on so many species identifications. Thanks to Lepidoptera expert Gerardo Lamas from the Department of Entomology at the Natural History Museum of San Marcos in Lima for reviewing and verifying the species identification guide created. Finally, thanks to Freerk Molleman, Jasmine Rowe and one other anonymous reviewer for providing comments to improve the final quality of this manuscript.
Sources of information:
Directorio de Producción Científica
Scopus