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Impact of human activity on the distribution of native and non-native cockroach species (Dictyoptera) in La Réunion and Mayotte

  • S. Boyer (a1) and C. Rivault (a1)


Establishment of non-native species and human-driven alteration of habitats are major causes of the decline of native faunas. Interference between native and non-native cockroach species was evaluated here by comparing their distribution areas in two oceanic islands: Mayotte and La Réunion. A factorial correspondence analysis showed that their presence is related to environmental parameters among which human activity, humidity and altitude are the three most important. Human activity and humidity favour establishment and development of non-native species, whereas altitude limits their presence. Non-native species form guilds (up to seven species). Their distribution areas overlap and illustrate their colonizing capacities. On the contrary, distribution areas of native species never overlap, although some co-occur with non-native species. Native species are more endangered when they are established in cultivated areas than when they are in protected natural areas.


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Impact of human activity on the distribution of native and non-native cockroach species (Dictyoptera) in La Réunion and Mayotte

  • S. Boyer (a1) and C. Rivault (a1)


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