01668nas a2200133   4500008004100000245007500041210006900116300001400185490000800199520105200207653020801259100002001467856004701487       2007                        eng d00aThe impact of herbivore-plant coevolution on plant community structure0 aimpact of herbivoreplant coevolution on plant community structur  a7483-74880 v1043 aCoevolutionary theory proposes that the diversity of chemical structures found in plants is, in large part, the result of selection by herbivores. Because herbivores often feed on chemically similar plants, they should impose selective pressures on plants to diverge chemically or bias community assembly toward chemical divergence. Using a coevolved interaction between a group of chrysomelid beetles and their host plants, I tested whether coexisting plants of the Mexican tropical dry forest tend to be chemically more dissimilar than random. Results show that some of the communities are chemically overdispersed and that overclispersion is related to the tightness of the interaction between plants and herbivores and the spatial scale at which communities are measured. As coevolutionary specialization increases and spatial scale decreases, communities tend to be more chemically dissimilar. At fairly local scales and where herbivores have tight one-to-one interactions with plants, communities have a strong pattern of chemical disparity.10aherbivore specialization insect-herbivore interaction plant chemical diversity mexican bursera burseraceae squirt-gun defense tropical forests displacement butterflies metabolism evolution beetles trends1 aBecerra, J., X.  uhttps://cephaloleia.myspecies.info/node/1800427nas a2200121   4500008004100000245008800041210006900129300001600198490000800214100001800222700001800240856004700258       2006                        eng d00aTropical forests are both evolutionary cradles and museums of leaf beetle diversity0 aTropical forests are both evolutionary cradles and museums of le  a10947-109510 v1031 aMcKenna, D.D.1 aFarrell, B.D.  uhttps://cephaloleia.myspecies.info/node/20