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Cirad

A review of methods for sampling arthropods in tree canopies

Basset Y., Springate N.D., Aberlenc H.P., Delvare G.. 1996. In : Stork N.E. (ed.), Adis J. (ed.), Didham R.K. (ed.). Canopy arthropods. London : Chapman and Hall, 35 p..

A review of most of the "non-fogging" methods which have been used to sample arthropods in tree canopies, particularly in tropical forests, is presented, emphasising the strengths and limitations of each methods, as well as the rationale for its use. In particular, methods used with the canopy raft are examined. The notion of ¿sampling packages' is discussed briefly and the review is supplemented with comparison of the selectivity of a sampling package of four methods used in Papua New Guinea for collecting adult leaf-feeding beetles: pyrethrum knockdown, composite flight-interception traps, branch clipping and hand-collecting/beating. The total number of species collected and known to feed on the tree species sampled was highest with hand-collecting/beating. The results emphasise the need for spatial seasonal replicates in faunal surveys and the abundance of transient species in these replicates. None of the sampling methods examined can be considered as a panacea for investigating a wide range of topics. It is imperative that several, complementary, methods should be used for general arthropod surveys. A key is provided to assist ecologists in selecting sampling methods appropriate for their research.

Mots-clés : forêt tropicale; arbre; arthropoda; échantillonnage; méthode; papouasie-nouvelle-guinée

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