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Communication Dans Un Congrès Année : 2014

Crop protection strategies influence the structural and functional diversity of epigeal spiders in apple orchards

Résumé

Apple orchards are agro-ecosystems managed with high levels of inputs and especially pesticides. Epigeal spider communities were sampled in three seasons using pitfall traps in 19 apple orchards with four different management strategies (abandoned, under organic, Integrated Pest Management or conventional protection) and thus significantly different pesticide usage. The abundance and diversity of the spider communities was the highest in abandoned orchards. Higher diversity and evenness values were the only difference in spider communities from the organic orchards compared to the other commercial orchards. The analysis of five ecological traits (proportion of aeronauts, type of diet, overwintering stages, body size and maternal care), however, clearly showed differences in the spiders from the organic orchards. The spider species in the other commercial orchards were smaller and showed higher dispersal abilities. Seven bioindicator species were identified in abandoned orchards, two species in organic ones (only Lycosidae) and one species in conventional orchards (Linyphiidae)
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Dates et versions

hal-01628850 , version 1 (04-11-2017)

Identifiants

  • HAL Id : hal-01628850 , version 1
  • PRODINRA : 294704

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Christophe Mazzia, Alain Pasquet, Gaëlle Marliac, Jodie Thenard, Jean-François Cornic, et al.. Crop protection strategies influence the structural and functional diversity of epigeal spiders in apple orchards. 28. European Congres of Arachnology, Aug 2014, Turin, Italy. ⟨hal-01628850⟩
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