02532nas a2200205   4500008004500000020001400045245014300059210006900202260001300271300001200284490000800296520177100304653001702075653001502092100001602107700002102123700002202144700002502166856013502191       2008                        Engldsh    a0030-129900aLow beta diversity of ambrosia beetles (Coleoptera: Curculionidae: Scolytinae and Platypodinae) in lowland rainforests of Papua New Guinea0 aLow beta diversity of ambrosia beetles Coleoptera Curculionidae   cFebruary  a214-2220 v1173 aWe assessed the effect of geographical distance on insect species turnover in a situation where other major environmental factors, including host plant species, altitude, and climate, were constant. We sampled ambrosia beetles (Coleoptera, Curculionidae: Scolytinae and Platypodinae) from four tree species: Artocarpus altilis, Ficus nodosa, Leea indica and Nauclea orientalis, at three sites forming a 1000 km transect in lowland rainforests of northern Papua New Guinea. A standardized volume of wood from trunk, branches and twigs was sampled for ambrosia beetles from three individuals of the four tree species at each site. Each tree was killed standing and left exposed to beetle colonization for 20 days prior to sampling. We obtained 12 751 individuals from 84 morphospecies of ambrosia beetles. We surveyed most of the local species richness at each site, predicted by Chao 2 species richness estimates. The similarity of ambrosia beetle communities, estimated by Chao-Sorensen index, was not correlated with their geographical distance. Likelihood analysis and Q-mode analysis using Monte Carlo-generated null distribution of beetles among sites supported the hypothesis that the assemblages of ambrosia beetles at different sites are drawn from the same species pool, regardless of their geographical distance. Tree part (trunk, branch, or twig) was more important predictor of the composition of ambrosia beetle communities than was the host species or geographical location. All three variables, however, explained only a small portion of variability in ambrosia assemblages. The distribution of ambrosia beetles among tree parts, tree species and study sites was mostly random, suggesting limited importance of host specificity or dispersal limitation.10aPlatypodinae10aScolytinae1 aHulcr, Jiri1 aNovotny, Vojtech1 aMaurer, Brian, A.1 aCognato, Anthony, I.  uhttps://weevil.myspecies.info/low-beta-diversity-ambrosia-beetles-coleoptera-curculionidae-scolytinae-and-platypodinae-lowland-rai02460nas a2200205   4500008004100000020001400041245012800055210006900183260001300252300001200265490000700277520173400284653001702018653001502035100001602050700001802066700001502084700002102099856013402120       2007                        eng d  a0307-694600aHost specificity of ambrosia and bark beetles (Col., Curculionidae: Scolytinae and Platypodinae) in a New Guinea rainforest0 aHost specificity of ambrosia and bark beetles Col Curculionidae   cDecember  a762-7720 v323 a1. Bark and ambrosia beetles are crucial for woody biomass decomposition in tropical forests worldwide. Despite that, quantitative data on their host specificity are scarce. 2. Bark and ambrosia beetles (Scolytinae and Platypodinae) were reared from 13 species of tropical trees representing 11 families from all major lineages of dicotyledonous plants. Standardised samples of beetle-infested twigs, branches, trunks, and roots were taken from three individuals of each tree species growing in a lowland tropical rainforest in Papua New Guinea. 3. A total of 81 742 beetles from 74 species were reared, 67 of them identified. Local species richness of bark and ambrosia beetles was estimated at 80[long dash]92 species. 4. Ambrosia beetles were broad generalists as 95% of species did not show any preference for a particular host species or clade. Similarity of ambrosia beetle communities from different tree species was not correlated with phylogenetic distances between tree species. Similarity of ambrosia beetle communities from individual conspecific trees was not higher than that from heterospecific trees and different parts of the trees hosted similar ambrosia beetle communities, as only a few species preferred particular tree parts. 5. In contrast, phloeophagous bark beetles showed strict specificity to host plant genus or family. However, this guild was poor in species (12 species) and restricted to only three plant families (Moraceae, Myristicaceae, Sapindaceae). 6. Local diversity of both bark and ambrosia beetles is not driven by the local diversity of trees in tropical forests, since ambrosia beetles display no host specificity and bark beetles are species poor and restricted to a few plant families.10aPlatypodinae10aScolytinae1 aHulcr, Jiri1 aMogia, Martin1 aIsua, Brus1 aNovotny, Vojtech  uhttps://weevil.myspecies.info/host-specificity-ambrosia-and-bark-beetles-col-curculionidae-scolytinae-and-platypodinae-new-guinea