Journal of Insect Conservation

, Volume 16, Issue 3, pp 473–477 | Cite as

Impact of native forest restoration on endemic crickets and katydids density in Rodrigues island

SHORT COMMUNICATION

Abstract

Native species of oceanic islands are often unique and of conservation concern. Native habitat restoration schemes are now conducted on many oceanic islands, and are often characterized by both the small sizes of the restored areas, and the high degradation level prior to restoration. Whereas arthropods are often neglected in restoration schemes, on small tropical islands they may represent the largest proportion of extant native terrestrial animals surviving habitat degradation. The island of Rodrigues, in the South Western Indian Ocean, is typical of such cases. The only patches of forest and bushes remaining on Rodrigues in 1996 were dominated by non-native invasive species. Since 1996, restoration schemes were conducted in Grande Montagne Nature Reserve. Benefits of these 15 years of native forest restoration were assessed on endemic Orthoptera density and diversity using acoustic monitoring and insect density measurements. Unrestored exotic plant-dominated areas were a low-density reservoir for endemic Orthoptera, many of which were new to science. Habitat restoration increased by four to seven times the density of these endemic Orthoptera, depending on the restoration scheme. The presence of managed areas did not significantly increase the density of endemic Orthoptera on the neighboring unrestored exotic plant-dominated areas.

Keywords

Orthoptera Endemism Acoustic monitoring Inventory and monitoring Mascarene 

Supplementary material

10841_2012_9476_MOESM1_ESM.pdf (7.3 mb)
Supplementary material 1 (PDF 7525 kb)

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Copyright information

© Springer Science+Business Media B.V. 2012

Authors and Affiliations

  1. 1.INCI UPR3212 CNRSUniversité de StrasbourgStrasbourg CedexFrance

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