Please use this identifier to cite or link to this item:
Title: When less means more: Reduction of both effort and survey methods boosts efficiency and diversity of harvestmen in a tropical forest
Authors: Porto, Willians
Pequeno, Pedro Aurélio Costa Lima
Tourinho, A. L.
Keywords: Biodiversity
Economic And Social Effects
Amazon Basin
Community Ecology
Reserva Ducke
Species Composition
Species Richness
Biological Survey
Community Ecology
Cost Analysis
Efficiency Measurement
Identification Method
Species Richness
Tropical Forest
Amazon Basin
Issue Date: 2016
metadata.dc.publisher.journal: Ecological Indicators
metadata.dc.relation.ispartof: Volume 69, Pags. 771-779
Abstract: Several ecological studies and monitoring programs of biodiversity have shown that using fewer collecting methods in biological surveys is more efficient than several redundant ones. However, in an attempt to increase species detection, researchers are still using as many field methods as possible in the surveys of arthropods and other megadiverse groups of invertebrates. The challenge is to reduce the overall time and effort for surveys while still retaining as much information about species richness and assemblage composition as possible. Researchers usually face a trade-off of loosing some information in order to have more efficient surveys. Here we show that more species were obtained in harvestmen surveys using a reduced version of the traditional method of active nocturnal search. We evaluated both the congruence and efficiency of the beating tray, and three versions of active nocturnal search across a tropical forest area in the Amazon basin. As nocturnal search has long been proved to be the most efficient method to capture arachnids, we tested three variations of this method in an attempt to improve harvestmen survey. A total of 2338 individuals of 23 species, in 20 genera and 10 families, were recorded using all methods together. Just one method, the active cryptic nocturnal search, encountered all taxa sampled with the maximum effort (sum of all methods) and data from this method recovered the ecological patterns found by the more intensive methods. Financial costs and time spent sampling and identifying specimens were reduced by 87% when compared to the maximum effort. We suggest that only one method, active cryptic nocturnal search, is the most efficient method to both sample and monitor harvestmen in Amazon tropical forests. © 2016 Elsevier Ltd.
metadata.dc.identifier.doi: 10.1016/j.ecolind.2016.05.014
Appears in Collections:Artigos

Files in This Item:
There are no files associated with this item.

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.