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Landscape diversity, better for biodiversity? - hoverflies and butterflies in different agri-environment schemes
Pécheur, Emilie; Piqueray, Julien; Dopagne, Claude et al.
20165th Ecosummit
 

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Keywords :
agri-environment schemes; syrphids; butterflies; biodiversity; agroecosystems
Abstract :
[en] In Europe, agri-environment schemes (AES) are designed to give credit to environmental issues in agricultural practices. Among the different Walloon AES, some are dedicated to enhance and preserve biodiversity linked to the agroecosystems. This study wishes to explore, at a landscape scale, how do different AES perform regarding butterflies and syrphidae diversity. Data collection occurred in five categories of ecological infrastructures (EI): four types of agri-environmental schemes (grassy strips, wildflower strips, bird-feeding margins, species-rich meadows) and cereal crops. Five replicates were selected for each category. Syrphidae were collected in water traps once per month, from May to July. Butterflies were monitored along transects from May to Augustus. Plant species were identified in every plot, within a 1-m radius around the traps and along a transect through every plot. Preliminary results show that abundance and species diversity of butterflies is significantly higher in parcels with floral resources. Moreover, hosts plants for larvae and foraging plants for adults are significantly more present in two types of AES: the wildflower strips and the species-rich meadows. Regarding the identified plant species, categories are divided in three groups (crops apart): bird-feeding margins; species-rich meadows and grassy strips; wildflower strips (Fig.1). Concerning hoverflies, a significantly higher abundance is observed in the wildflower strips compared to the crops in June (p= 0.008). Other abundance values in May and July show no difference. These results suggest that wildflower strips are performing infrastructures for biodiversity conservation in agroecosystems. As the presence of floral resources seem to be an important factor for the presence of foraging of adults, attention should be paid to the provisioning of food resources for the larval stages, especially butterflies, at a landscape scale in order to assure a sustainable approach in biodiversity support.
Disciplines :
Environmental sciences & ecology
Author, co-author :
Pécheur, Emilie ;  Université de Liège > Ingénierie des biosystèmes (Biose) > Biodiversité et Paysage
Piqueray, Julien;  Natagriwal asbl
Dopagne, Claude ;  Université de Liège > Département de Biologie, Ecologie et Evolution > Biologie de l'évolution et de la conservation - aCREA-Ulg
Mahy, Grégory ;  Université de Liège > Ingénierie des biosystèmes (Biose) > Biodiversité et Paysage
Dufrêne, Marc  ;  Université de Liège > Ingénierie des biosystèmes (Biose) > Biodiversité et Paysage
Language :
English
Title :
Landscape diversity, better for biodiversity? - hoverflies and butterflies in different agri-environment schemes
Publication date :
31 August 2016
Event name :
5th Ecosummit
Event place :
Montpellier, France
Event date :
du 28 août 2016 au 02 septembre 2016
Audience :
International
Available on ORBi :
since 13 October 2016

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