02769nas a2200289   4500008004500000020001400045245014200059210006900201260001300270300001000283490000700293520176800300653002902068653002702097653002802124653002402152653001402176653001702190653001302207100002002220700002102240700002302261700002102284700002002305700001902325856013502344       2008                        Engldsh    a0046-225X00aInfluence of temperature on spring flight initiation for southwestern ponderosa pine bark beetles (Coleoptera: Curculionidae, Scolytinae)0 aInfluence of temperature on spring flight initiation for southwe  cFebruary  a57-690 v373 aDetermination of temperature requirements for many economically important insects is a cornerstone of pest management. For bark beetles (Coleoptera: Curculionidae, Scolytinae), this information can facilitate timing of management strategies. Our goals were to determine temperature predictors for flight initiation of three species of Ips bark beetles, five species of Dendroctonus bark beetles, and two genera of bark beetle predators, Enoclerus spp. (Coleoptera: Cleridae) and Temnochila chlorodia (Mannerheim) (Coleoptera: Ostomidae), in ponderosa pine forests of northcentral Arizona. We quantified beetle flight activity using data loggers and pheromone-baited funnel traps at 18 sites over 4 yr. Ambient air temperature was monitored using temperature data loggers located in close proximity to funnel traps. We analyzed degree-day accumulation and differences between minimum, average, and maximum ambient temperature for the week before and week of first beetle capture to calculate flight temperature thresholds. Degree-day accumulation was not a good predictor for initiation of beetle flight. For all species analyzed other than D. adjunctus Blandford, beetles were captured in traps only when springtime temperatures exceeded 15.0[degree]C. D. adjunctus was collected when maximum temperatures reached only 14.5[degree]C. Once initial flights had begun, beetles were often captured when maximum ambient air temperatures were below initial threshold temperatures. Maximum and average air temperatures were a better predictor for beetle flight initiation than minimum temperature. We establish a temperature range for effective monitoring of bark beetles and their predators, and we discuss the implications of our results under climate change scenarios10aDendroctonus brevicornis10aDendroctonus frontalis10aDendroctonus ponderosae10aDendroctonus valens10aEnoclerus10aIps lecontei10aIps pini1 aGaylord, M., L.1 aWilliams, K., K.1 aHofstetter, R., W.1 aMcMillin, J., D.1 aDegomez, T., E.1 aWagner, M., R.  uhttps://weevil.myspecies.info/influence-temperature-spring-flight-initiation-southwestern-ponderosa-pine-bark-beetles-coleoptera-c03403nas a2200217   4500008004100000020001400041245015600055210006900211260001000280300001200290490000800302520257800310653002802888653002802916653001302944100002602957700001702983700002603000700002403026856013503050       2011                        eng d  a0378-112700aAssessing forest vulnerability and the potential distribution of pine beetles under current and future climate scenarios in the Interior West of the US0 aAssessing forest vulnerability and the potential distribution of  cAug 1  a307-3160 v2623 aThe aim of our study was to estimate forest vulnerability and potential distribution of three bark beetles (Curculionidae: Scolytinae) under current and projected climate conditions for 2020 and 2050. Our study focused on the mountain pine beetle (Dendroctonus ponderosae), western pine beetle (Dendroctonus brevicomis), and pine engraver (Ips pini). This study was conducted across eight states in the Interior West of the US covering approximately 2.2 million km2 and encompassing about 95% of the Rocky Mountains in the contiguous US. Our analyses relied on aerial surveys of bark beetle outbreaks that occurred between 1991 and 2008. Occurrence points for each species were generated within polygons created from the aerial surveys. Current and projected climate scenarios were acquired from the WorldClim database and represented by 19 bioclimatic variables. We used Maxent modeling technique fit with occurrence points and current climate data to model potential beetle distributions and forest vulnerability. Three available climate models, each having two emission scenarios, were modeled independently and results averaged to produce two predictions for 2020 and two predictions for 2050 for each analysis. Environmental parameters defined by current climate models were then used to predict conditions under future climate scenarios, and changes in different species' ranges were calculated. Our results suggested that the potential distribution for bark beetles under current climate conditions is extensive, which coincides with infestation trends observed in the last decade. Our results predicted that suitable habitats for the mountain pine beetle and pine engraver beetle will stabilize or decrease under future climate conditions, while habitat for the western pine beetle will continue to increase over time. The greatest increase in habitat area was for the western pine beetle, where one climate model predicted a 27% increase by 2050. In contrast, the predicted habitat of the mountain pine beetle from another climate model suggested a decrease in habitat areas as great as 46% by 2050. Generally, 2020 and 2050 models that tested the three climate scenarios independently had similar trends, though one climate scenario for the western pine beetle produced contrasting results. Ranges for all three species of bark beetles shifted considerably geographically suggesting that some host species may become more vulnerable to beetle attack in the future, while others may have a reduced risk over time. [copyright]2011 Elsevier B.V. All rights reserved.10aDendroctonus brevicomis10aDendroctonus ponderosae10aIps pini1 aEvangelista, Paul, H.1 aKumar, Sunil1 aStohlgren, Thomas, J.1 aYoung, Nicholas, E.  uhttps://weevil.myspecies.info/assessing-forest-vulnerability-and-potential-distribution-pine-beetles-under-current-and-future-clim02333nas a2200253   4500008004500000020001400045245013000059210006900189260000900258300001200267490000700279520143100286653002801717653002701745653001301772100003001785700002201815700002101837700002301858700002601881700001501907700002201922856013501944       2008                        Engldsh    a0046-225X00aLack of genetic differentiation in aggressive and secondary bark beetles (Coleoptera: Curculionidae, Scolytinae) from Arizona0 aLack of genetic differentiation in aggressive and secondary bark  cJune  a817-8240 v373 aBark beetles (Coleoptera: Curculionidae, Scolytinae) play an important role as disturbance agents in ponderosa pine (Pinus ponderosa Douglas ex Lawson) forests of Arizona. However, from 2001 to 2003, elevated bark beetle activity caused unprecedented levels of ponderosa pine mortality. A better understanding of the population structure of these species will facilitate analysis of their dispersal patterns and improve management strategies. Here, we use fluorescently labeled amplified fragment length polymorphism (fAFLP) analysis to resolve genetic variation among and within sampling locations in northcentral Arizona of Ips pini (Say), Dendroctonus brevicomis LeConte, and D. frontalis Zimmermann. We generated genetic fingerprints for >500 beetle specimens and analyzed genetic diversity. For all species, gene flow estimates among sampling locations were high, and significant population subdivision was not discernible across a large portion of ponderosa pine forests in Arizona. However, a weak relationship was detected with L pini population structure and elevation. Because of the lack of genetic differentiation detected throughout the large study area, our findings suggest these insects are capable of long distance dispersal and exhibit a high degree of gene flow across abroad region. We conclude that our results are consistent with strong dispersal patterns and large population sizes of all three species.10aDendroctonus brevicomis10aDendroctonus frontalis10aIps pini1 aAllender, Christopher, J.1 aClancy, Karen, M.1 aDeGomez, Tom, E.1 aMcMillin, Joel, D.1 aWoolbright, Scott, A.1 aKeim, Paul1 aWagner, David, M.  uhttps://weevil.myspecies.info/lack-genetic-differentiation-aggressive-and-secondary-bark-beetles-coleoptera-curculionidae-scolytin