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Wham, B. E., Rahman, S. R., Martinez‐Correa, M., & Hines, H. M. (2021). Mito‐nuclear discordance at a mimicry color transition zone in bumble bee Bombus melanopygus. Ecology and Evolution, 11(24), 18151–18168. doi:10.1002/ece3.8412 https://doi.org/10.1002/ece3.8412

As hybrid zones exhibit selective patterns of gene flow between otherwise distinct lineages, they can be especially valuable for informing processes of microevolution and speciation. The bumble bee, Bombus melanopygus, displays two distinct color forms generated by Müllerian mimicry: a northern “Roc…

Lewthwaite, J. M. M., & Mooers, A. Ø. (2021). Geographical homogenization but little net change in the local richness of Canadian butterflies. Global Ecology and Biogeography. doi:10.1111/geb.13426 https://doi.org/10.1111/geb.13426

Aim: Recent studies have found that local-scale plots measured through time exhibit marked variation in the change in species richness. However, the overall effect often reveals no net change. Most studies to date have been agnostic about the identities of the species lost/gained and about the proce…

Sirois‐Delisle, C., & Kerr, J. T. (2021). Climate change aggravates non‐target effects of pesticides on dragonflies at macroecological scales. Ecological Applications. doi:10.1002/eap.2494 https://doi.org/10.1002/eap.2494

Critical gaps in understanding how species respond to environmental change limit our capacity to address conservation risks in a timely way. Here, we examine the direct and interactive effects of key global change drivers, including climate change, land use change, and pesticide use, on persistence …

Koch, J. B. U., Tabor, J. A., Montoya-Aiona, K., & Eiben, J. A. (2021). The Invasion of Megachile policaris (Hymenoptera: Megachilidae) to Hawai‘i. Journal of Insect Science, 21(5). doi:10.1093/jisesa/ieab065 https://doi.org/10.1093/jisesa/ieab065

Islands are insular environments that are negatively impacted by invasive species. In Hawai‘i, at least 21 non-native bees have been documented to date, joining the diversity of >9,000 non-native and invasive species to the archipelago. The goal of this study is to describe the persistence, genet…

Hemberger, J., Crossley, M. S., & Gratton, C. (2021). Historical decrease in agricultural landscape diversity is associated with shifts in bumble bee species occurrence. Ecology Letters. doi:10.1111/ele.13786 https://doi.org/10.1111/ele.13786

Agricultural intensification is a key suspect among putative drivers of recent insect declines, but an explicit link between historical change in agricultural land cover and insect occurrence is lacking. Determining whether agriculture impacts beneficial insects (e.g. pollinators), is crucial to enh…

Murray, E. A., Evanhoe, L., Bossert, S., Geber, M. A., Griswold, T., & McCoshum, S. M. (2021). Phylogeny, Phenology, and Foraging Breadth of Ashmeadiella (Hymenoptera: Megachilidae). Insect Systematics and Diversity, 5(3). doi:10.1093/isd/ixab010 https://doi.org/10.1093/isd/ixab010

Ashmeadiella Cockerell (Megachilidae: Osmiini) is a bee genus endemic to North America, with greatest richness in arid and Mediterranean regions of the southwestern United States. Species relationships of Ashmeadiella were last analyzed in the 1950s, when Robert Sokal and Charles Michener developed …

Tabor, J. A., & Koch, J. B. (2021). Ensemble Models Predict Invasive Bee Habitat Suitability Will Expand under Future Climate Scenarios in Hawai’i. Insects, 12(5), 443. doi:10.3390/insects12050443 https://doi.org/10.3390/insects12050443

Climate change is predicted to increase the risk of biological invasions by increasing the availability of climatically suitable regions for invasive species. Endemic species on oceanic islands are particularly sensitive to the impact of invasive species due to increased competition for shared resou…

Ji, Y. (2021). The geographical origin, refugia, and diversification of honey bees (Apis spp.) based on biogeography and niche modeling. Apidologie. doi:10.1007/s13592-020-00826-6 https://doi.org/10.1007/s13592-020-00826-6

An understanding of the origin and formation of biodiversity and distribution patterns can provide a theoretical foundation for biodiversity conservation. In this study, phylogeny and biogeography analyses based on mitochondrial genomes and niche modeling based on occurrence records were performed t…

Orr, M. C., Hughes, A. C., Chesters, D., Pickering, J., Zhu, C.-D., & Ascher, J. S. (2020). Global Patterns and Drivers of Bee Distribution. Current Biology. doi:10.1016/j.cub.2020.10.053 https://doi.org/10.1016/j.cub.2020.10.053

Insects are the focus of many recent studies suggesting population declines, but even invaluable pollination service providers such as bees lack a modern distributional synthesis. Here, we combine a uniquely comprehensive checklist of bee species distributions and >5,800,000 public bee occurrence re…

随机森林(Random forest)模型在2001年发表后得到广泛的关注。由于随机森林可以进行回归和判别等多种统计分析,而且不受正态性、方差齐性和自变量独立性等参数检验的前提条件的制约,其应用日益普遍,有被看作万能模型的趋势。实际上,随机森林是一种特点鲜明的模型,应用局部优化拟合观察值,在分析有偏效应关系的数据时,其结果往往不准确。本文以蝉科(Cicadidea)物种的分布数据为例,比较了随机森林在回归分析时与多元线性回归、广义可加模型和人工神经网络模型的差别,在判别分析时与线性判别分析的差别,强调了随机森林预测时的碎片化特点。结果显示随机森林在处理有多元共线性和交互作用的数据时,以及在判别…