02885nas a2200289   4500008004500000020001400045245010600059210006900165260001300234300001000247490000800257520198900265653001502254653001302269653001402282653002002296653001702316653001502333100001302348700002102361700001602382700001502398700001702413700002302430700001502453856012702468       2008                        Engldsh    a0029-854900aResponses of parasitoids to saproxylic hosts and habitat: a multi-scale study using experimental logs0 aResponses of parasitoids to saproxylic hosts and habitat a multi  cFebruary  a63-740 v1553 aSpecies belonging to higher trophic levels are particularly vulnerable to habitat loss and consequential host population declines, but detection of effects depends on observation scale. We investigated the effects of habitat and host availability at multiple scales on parasitoids of early successional saproxylic beetles in middle boreal Sweden, where forestry has led to habitat fragmentation and coarse woody debris (CWD) loss. Parasitoid wasps and beetle hosts were collected from nine locations, each containing three spruce-dominated stand types (clear-cut, mature managed and unmanaged stands), using emergence traps on experimental CWD. We measured local CWD volumes and determined the availability of forests of a suitable age within the landscape. We tested parasitoid responses to stand type, CWD volume, abundance of known and probable hosts and longitude. Additionally, we tested whether parasitoids responded to the area of habitat of a suitable age within radii from 0.2 to 10 km. Stand type appeared in best-fit models for all common species, suggesting that wasps respond strongly to habitat at local scales. Longitude (largely climate) featured commonly, but CWD volume was never significant. Host abundance appeared in best-fit models for three of five common species, proving significant only for Bracon obscurator, the abundance of which correlated with that of Orthotomicus laricis at both trap and site levels. Rhimphoctona spp. also correlated significantly with its known host Tetropium castaneum at the trap level. B. obscurator responded to habitat area at scales of 0.6-1 km and Cosmophorus regius responded at radii greater than 7 km, while the larger species did not respond strongly to habitat area. The role of habitat area at greater scales thus varied greatly amongst species, but our data suggest that dispersal of these common early successional species may not be strongly restricted at the current scale of fragmentation of their boreal habitats.10aDryocoetes10aHylastes10aHylurgops10aIps typographus10aOrthotomicus10aPityogenes1 aGibb, H.1 aHilszczanski, J.1 aHjalten, J.1 aDanell, K.1 aBall, J., P.1 aPettersson, R., B.1 aAlinvi, O.  uhttps://weevil.myspecies.info/responses-parasitoids-saproxylic-hosts-and-habitat-multi-scale-study-using-experimental-logs01650nam a2200229   4500008004100000020002200041245008500063210006900148300001200217520093700229653001701166653000801183653001501191653001301206653001201219653001701231100002001248700001801268700001801286700001301304856010301317       2011                        eng d  a978-3-642-17814-600aChemical Ecology of Bark Beetles in Regard to Search and Selection of Host Trees0 aChemical Ecology of Bark Beetles in Regard to Search and Selecti  a150-1903 aBark beetles (Coleoptera: Scolytidae), especially pests in the genera Dendroctonus, Ips, Scolytus, Trypodendron, Tomicus, and Pityogenes of the Northern hemisphere are reviewed regarding aspects of their chemical ecology during host finding and selection. Most of the species covered here feed on conifers, primarily pines (Pinus) in the Northern hemisphere and Norway spruce (Picea abies) of Europe and Asia. Bark beetles use a variety of olfactory strategies to discriminate suitable host trees from among less suitable, overcolonized, or decaying hosts as well as nonhosts. Bark beetles also use olfactory strategies to find mates and select attack sites. These strategies have implications for coevolution of trees and bark beetles. Knowledge of the chemical ecology of insect-insect and insect-plant relationships is necessary to develop improved methods for monitoring and controlling bark beetles that are predators of trees.10aDendroctonus10aIps10aPityogenes10aScolytus10aTomicus10aTrypodendron1 aByers, John, A.1 aZhang, Qinghe1 aLiu, Tongxian1 aKang, Le  uhttps://weevil.myspecies.info/chemical-ecology-bark-beetles-regard-search-and-selection-host-trees00406nas a2200121   4500008004100000245005900041210005600100300000700156490000700163653001500170100001600185856008300201       1947                        eng d00aÀ propos du genre Pityogenes Bedel (Col. Scolytoidea)0 aÀ propos du genre Pityogenes Bedel Col Scolytoidea  a440 v5210aPityogenes1 aBalachowsky  uhttps://weevil.myspecies.info/propos-du-genre-pityogenes-bedel-col-scolytoidea02776nas a2200217   4500008004100000020001400041245004800055210004700103260000900150300001200159490000600171520221900177653001702396653000802413653001502421653001202436100002602448700002202474700002402496856003802520       2012                        eng d  a2075-445000aWhat is Next in Bark Beetle Phylogeography?0 aWhat is Next in Bark Beetle Phylogeography  cJune  a453-4720 v33 aBark beetle species within the scolytid genera Dendroctonus, Ips, Pityogenes and Tomicus are known to cause extensive ecological and economical damage in spruce and pine forests during epidemic outbreaks all around the world. Dendroctonus ponderosae poses the most recent example having destroyed almost 100,000 km2 of conifer forests in North America. The success and effectiveness of scolytid species lies mostly in strategies developed over the course of time. Among these, a complex system of semiochemicals promotes the communication and aggregation on the spot of infestation facilitating an en masse attack against a host tree's defenses; or an association with fungi that evolved either in the form of nutrition (ambrosia fungi) or even by reducing the resistance of host trees (blue-stain fungi). Although often specific to a tree genus or species, some bark beetles are polyphagous and have the ability to switch on to new hosts and extend their host range (i.e., between conifer genera such as Pityogenes chalcographus or even from conifer to deciduous trees as Polygraphus grandiclava). A combination of these capabilities in concert with life history or ecological traits explains why bark beetles are considered interesting subjects in evolutionary studies. Several bark beetle species appear in phylogeographic investigations, in an effort to improve our understanding of their ecology, epidemiology and evolution. In this paper investigations that unveil the phylogeographic history of bark beetles are reviewed. A close association between refugial areas and postglacial migration routes that insects and host trees have followed in the last 15,000 BP has been suggested in many studies. Finally, a future perspective of how next generation sequencing will influence the resolution of phylogeographic patterns in the coming years is presented. Utilization of such novel techniques will provide a more detailed insight into the genome of scolytids facilitating at the same time the application of neutral and non-neutral markers. The latter markers in particular promise to enhance the study of eco-physiological reaction types like the so-called pioneer beetles or obligate diapausing individuals.10aDendroctonus10aIps10aPityogenes10aTomicus1 aAvtzis, Dimitrios, N.1 aBertheau, Coralie1 aStauffer, Christian  uhttp://www.mdpi.com/2075-4450/3/200407nas a2200121   4500008004100000245006000041210005600101300000700157490000700164653001500171100001600186856008300202       1947                        eng d00aÀ propos du genre Pityogenes Bedel (Col. Scolytoidea).0 aÀ propos du genre Pityogenes Bedel Col Scolytoidea  a440 v5210aPityogenes1 aBalachowsky  uhttps://weevil.myspecies.info/propos-du-genre-pityogenes-bedel-col-scolytoidea