Quaternary climate instability is correlated with patterns of population genetic variability in <i>Bombus huntii</i>

Koch, Jonathan B.; Vandame, Rémy; Mérida‐Rivas, Jorge; Sagot, Philippe; Strange, James P.

doi:10.1002/ece3.4294

Cited by 20 publications

(32 citation statements)

References 65 publications

(110 reference statements)

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“…However, in all mountain provinces significant species loss in western North America is expected to occur across an altitude gradient [2]. Our regional study in the Pacific Northwest support the inference of Sirois-Delise and Kerr [2] that most bumble bee species will experience significant HS loss at low altitudes and latitudes, which will only be exacerbated by their inability to disperse to across geographic distance due to the lack of suitable habitat [27,28,43].…”

Section: Discussionsupporting

confidence: 71%

“…Permutation tests of variable performance employed within the MaxEnt software platform used the training points to assess the relative contribution of each variable to the final averaged model in the context of the AUC statistic. A significant drop in the AUC statistic after a bioclimatic variable is removed suggests that the variable significantly contributes to the estimation of HS [43].…”

Section: Methodsmentioning

confidence: 99%

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Projected climate change will reduce habitat suitability for bumble bees in the Pacific Northwest

Looney

Hopkins

et al. 2019

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21Global climate change is the greatest environmental challenge of the modern era. The impacts of 22 climate change are increasingly well understood, and have already begun to materialize across 23 diverse ecosystems and organisms. Bumble bees (Bombus) are suspected to be highly sensitive to 24 climate change as they are predominately adapted to temperate and alpine environments. In this 25 study, we determine which bumble bee species are most vulnerable to climate change in the 26 Pacific Northwest. The Pacific Northwest is a topographically complex landscape that is 27 punctuated by two major mountain ranges and a labyrinth of offshore islands in the Salish Sea. 28 Using standardized survey methods, our study documents the occurrence of 15 bumble bee 29 species across 23 field sites in seven federal parks, historical sites, and monuments. Our results 30show that bumble bee community richness and diversity increases along an altitude gradient in 31 these protected areas. Furthermore, NMDS analysis reveals that high altitude environments are 32 composed of a unique group of bumble bee species relative to low altitude environments. 33Finally, based on an analysis of species distributions models that aggregate bioclimatic data from 34 global circulation climate models with preserved specimen records, we discover that 80% of the 35 bumble bee species detected in our survey are poised to undergo habitat suitability (HS) loss 36 within the next 50 years. Species primarily found in high altitude environments namely B. 37 vandykei, B. sylvicola, and B. bifarius are projected to incur a mean HS loss of 63%, 59%, and 38 30% within the federally protected areas, respectively. While the implementation of climate 39 change policies continue to be a significant challenge, the development of mitigation strategies to 40 conserve the most vulnerable species may be a tractable option for land managers and 41 stakeholders of protected areas. Our study meets this need by identifying which species and 42 communities are most sensitive to climate change.43 44 45 Pollinator communities worldwide are undergoing dramatic changes in both abundance 46 and composition that may put pollination service at risk in many terrestrial ecosystems [1]. These 47 changes may not solely be unidirectional declines in species abundance, but can manifest as 48 shifts in geographic range, increases in abundance where new habitat is formed, or shifts in 49 phenology [2-4]. To date, documented changes in pollinator communities have been attributed to 50 many factors, including pathogen outbreaks, pesticides, climate change, introduced species, and 51 land-use change [4-9]. Identifying the factors affecting pollinator communities can be 52 challenging as most strategies investigate distinct taxonomic groups (guilds) [10], or attempt to 53 isolate specific threats and measure a single species' responses to the threat in question [2-4,11].54However, given the negative impacts of rapid global change [1,5], it is imperative to identify 55 which pollinator ...

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Section: Discussionsupporting

confidence: 71%

Section: Methodsmentioning

confidence: 99%

Projected climate change will reduce habitat suitability for bumble bees in the Pacific Northwest

Looney

Hopkins

et al. 2019

Preprint

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“…californicus inhabit different habitat niches [ 36 ]. Future research could examine how climate, mimicry, and floral niche might contribute to their ability to coexist in some portions of their range, but not in others [ 27 , 28 , 65 , 72 ]. For example, Pleistocene climate variation has been hypothesized to not only drive genetic divergence in B .…”

Section: Discussionmentioning

confidence: 99%

“…For example, Pleistocene climate variation has been hypothesized to not only drive genetic divergence in B . huntii , but also differences in bioclimatic niche, and potentially in setal color variation [ 72 ]. In addition to B .…”

Section: Discussionmentioning

confidence: 99%

Phylogeny and population genetic analyses reveals cryptic speciation in the Bombus fervidus species complex (Hymenoptera: Apidae)

et al. 2018

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Bumble bees (Bombus Latrielle) are significant pollinators of flowering plants due to their large body size, abundant setae, and generalist foraging strategies. However, shared setal coloration patterns among closely and distantly related bumble bee species makes identification notoriously difficult. The advent of molecular genetic techniques has increased our understanding of bumble bee evolution and taxonomy, and enables effective conservation policy and management. Individuals belonging to the North American Bombus fervidus species-complex (SC) are homogenous in body structure but exhibit significant body color phenotype variation across their geographic distribution. Given the uncertainty of the genealogical boundaries within the SC, some authors have synonymized all members of the B. fervidus SC within a single taxon, while others propose an alternative two taxa hypothesis. Operating under the phylogenetic species concept, our analysis supports the hypothesis that there are two independent lineages of bumble bees within the B. fervidus SC. With the current evidence, however, it is not possible to assign valid names to either of them, because both lineages include the color phenotypes found in the original species descriptions of B. fervidus and B. californicus. Cryptic speciation does not seem to be the product of Müllerian mimicry between the clades, because diverging coloration patterns are observed when the distribution of the clades overlaps. Furthermore, within each lineage there is evidence for strong population differentiation that is correlated with geographic distribution rather than color phenotype. In our study, we demonstrate the importance of obtaining a broad sample of multiple populations when conducting lower-level phylogenetic analyses. In addition to improving our knowledge of bumble bee diversification patterns, characterizing the evolutionary history of these pollinators provides the foundation needed to guide contemporary conservation assessments and management strategies.

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“…2017; Koch et al . 2018). Changes in the climate have led to range shifts and the alteration of niche suitability across species distributions, making population connectivity transient over space and time (Aguilée et al .…”

Section: Introductionmentioning

confidence: 99%

The differential genetic signatures related to climatic landscapes for jaguars and pumas on a continental scale

et al. 2020

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Modern and paleoclimate changes may have altered species dynamics by shifting species’ niche suitability over space and time. We analyze whether the current genetic structure and isolation of the two large American felids, jaguar (Panthera onca) and puma (Puma concolor), are mediated by changes in climatic suitability and connection routes over modern and paleoclimatic landscapes. We estimate species distribution under 5 climatic landscapes (modern, Holocene, last maximum glaciations [LMG], average suitability, and climatic instability) and correlate them with individuals’ genetic isolation through causal modeling on a resemblance matrix. Both species exhibit genetic isolation patterns correlated with LMG climatic suitability, suggesting that these areas may have worked as “allele refuges.” However, the jaguar showed higher vulnerability to climate changes, responding to modern climatic suitability and connection routes, whereas the puma showed a continuous and gradual transition of genetic variation. Despite differential responsiveness to climate change, both species are subjected to the climatic effects on genetic configuration, which may make them susceptible to future climatic changes, since these are progressing faster and with higher intensity than changes in the paleoclimate. Thus, the effects of climatic changes should be considered in the design of conservation strategies to ensure evolutionary and demographic processes mediated by gene flow for both species.

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Quaternary climate instability is correlated with patterns of population genetic variability in Bombus huntii

Cited by 20 publications

References 65 publications

Projected climate change will reduce habitat suitability for bumble bees in the Pacific Northwest

Projected climate change will reduce habitat suitability for bumble bees in the Pacific Northwest

Phylogeny and population genetic analyses reveals cryptic speciation in the Bombus fervidus species complex (Hymenoptera: Apidae)

The differential genetic signatures related to climatic landscapes for jaguars and pumas on a continental scale

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