Skip to Main content Skip to Navigation
Theses

Les coccinelles algériennes (Coleoptera, Coccinellidae) : analyse faunistique et structure des communautés

Abstract : The study led during four consecutive years (on 2003-2007) shed light on the species composition, and habitat characteristics of the communities of ladybirds in Algeria. 48 species were listed among which 46 are biological control agents. They divide up in 8 sub-families, 12 tribes and 23 genera. The specific richness is very high in the sectors of the North of Algeria (41 species). This zone is characterized by bioclimates wet, sub-wet and semi-dry grouping. It is very low on the other hand in the sector of the Saharan Atlas and the Algerian South with respectively 12 and 16 species. The study of trophic interactions, spatial and temporal distribution of the main species, led us to define their ecological niches in the various agro-ecosystems of Algeria. So, the spatial distribution of the species can appear as something static. It is in reality a dynamic process the engine of which is the availability of favorable habitats that shelter ladybird preferential prey. Communities of ladybird works on the principle of division (sharing) of the resources and the interactions between species organize the community in trophic networks. The analysis of the distribution of ladybirds through the various geographical areas shows that the C. septempunctata, H. variegata, S. punctillum, and, H. argus present strong ecological valence. On the other hand, P. ovoideus, P. numidicus, E. pubescens forme apicalis, H. marmottani, and Pullus sp are specific to the Saharan regions and more particularly to northern Sahara.
Document type :
Theses
Complete list of metadatas

https://tel.archives-ouvertes.fr/tel-01914941
Contributor : Abes Star :  Contact
Submitted on : Wednesday, November 7, 2018 - 11:36:30 AM
Last modification on : Friday, January 10, 2020 - 9:08:36 PM
Long-term archiving on: : Friday, February 8, 2019 - 2:07:30 PM

File

2017TOU30246b.pdf
Version validated by the jury (STAR)

Identifiers

  • HAL Id : tel-01914941, version 1

Collections

Citation

Lounes Saharaoui. Les coccinelles algériennes (Coleoptera, Coccinellidae) : analyse faunistique et structure des communautés. Biodiversité. Université Paul Sabatier - Toulouse III, 2017. Français. ⟨NNT : 2017TOU30246⟩. ⟨tel-01914941⟩

Share

Metrics

Record views

115

Files downloads

2687