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A comparative analysis of butterfly richness detection capacityof Pollard transects and general microhabitat surveys

Published online by Cambridge University Press:  02 July 2012

Isabelle Létourneau ,
Maxim Larrivée  and
Antoine Morin
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Abstract

Assessing biodiversity is essential in conservation biology but theresources needed are often limited. Citizen science, by which volunteersgather data at low cost, represents a potential solution for the lack ofresources if it produces usable data for scientific means. Scientificinventories for butterflies are often performed with a Pollard transect, astandardised surveying technique that generates high-quality data. Generalmicrohabitat surveys (GMSs) are potentially more appealing to amateursparticipating in citizen science projects because they are less constrained.We compare estimates of butterfly species richness acquired by Pollardtransects to those obtained by GMSs. We demonstrate that GMSs allowsurveyors to detect more butterfly species and a more complete portrait oflocal butterfly assemblages for the same number of individuals captured.

Résumé

La quantification de la biodiversité est indispensable en biologie de laconservation mais les ressources nécessaires sont souvent limitées. Laparticipation citoyenne à la science, par laquelle des bénévoles récoltent àpeu de frais des données, représente une solution potentielle au manque deressources si les techniques d'inventaires utilisées par les amateurspeuvent produire des données utilisables à des fins scientifiques. Lesinventaires scientifiques de papillons sont généralement effectués avec destransects Pollard, un type d'inventaire standardisé générant des donnéesd'excellente qualité. L'inventaire général des microhabitats n'est pas aussicontraignant et est potentiellement plus approprié pour les amateursdésirant s'impliquer dans des projets de participation citoyenne à lascience. Nous comparons les estimés obtenus par des transects Pollard à ceuxobtenus par des inventaires généraux des microhabitats afin d’évaluer leurcapacité respective à mesurer la richesse spécifique en papillons. Nousdémontrons que les inventaires généraux des microhabitats détectent plusd'espèces de papillons et produisent un portrait plus complet de la richesselocale des assemblages de papillons que le transect Pollard pour le mêmenombre de captures.

Information

Type
Original Article
Information
The Canadian Entomologist , Volume 144 , Issue 5 , October 2012 , pp. 727 - 731
Copyright
Copyright © Entomological Society of Canada 2012

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