Bat-cave catchment areas: using stable isotopes (δD) to determine the probable origins of hibernating bats

Sullivan, Alexis R.; Bump, Joseph K.; Kruger, Laura A.; Peterson, Rolf O.

doi:10.1890/1051-0761-22.5.1428

Cited by 14 publications

(20 citation statements)

References 27 publications

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“…We are not suggesting that stable isotope analysis be used to redefine species ranges or that bats originate from every possible location, as this method is based on global patterns and not constrained by the biology of the animal, although it can be (e.g., Sullivan et al 2012). For example, our IsoMAP analysis shows that, based on stable isotopes, silver-haired bats killed in southern Alberta could have originated from eastern Canada.…”

Section: Discussionmentioning

confidence: 90%

“…Combining this relationship with capture and museum records demonstrated that some hoary bats migrate long-distances (.2000 km; Cryan et al 2004). Further studies have attempted to evaluate the use of stable-isotope analysis to assign origins to individuals of various bat species across Europe , the eastern United States (Britzke et al 2009, Sullivan et al 2012, and Canada (Fraser et al 2012 (Britzke et al 2009). Given the difficulty in studying bat migration, the ability to use endogenous markers, such as stable isotopes, offers a feasible alternative to more traditional but inefficient methods (i.e., banding or radiotracking).…”

Section: Introductionmentioning

confidence: 99%

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Origins and migratory patterns of bats killed by wind turbines in southern Alberta: evidence from stable isotopes

2014

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Abstract. Large numbers of migratory bats are killed every autumn at wind energy facilities in North America. While this may be troubling from a population perspective, these fatalities provide an opportunity to learn more about bat migration and the origins and summer distributions of migratory bats by using endogenous markers. Such markers include stable isotope values, which have been used to answer questions about ecological systems, such as trophic levels and food webs, and the origins and migratory routes of animals. H f values indicated that silver-haired bats likely originated in the boreal forest, farther north and/or at higher elevations than the aspen parkland-like habitat suggested by the isotope values of hoary bats. IsoMAP analysis indicated that bat fatalities may have originated from a large catchment area potentially hundreds of kilometers away. Our data provide further evidence for a migration route along the eastern slopes of the Rocky Mountains that is used by bats from across Alberta and beyond, and suggest that fatalities at a single wind energy site have the potential to have far-reaching ecological and population consequences.

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Section: Discussionmentioning

confidence: 90%

Section: Introductionmentioning

confidence: 99%

Origins and migratory patterns of bats killed by wind turbines in southern Alberta: evidence from stable isotopes

2014

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“…Research on migratory connectivity has commonly focused on avian species (Bridge et al 2011, Hobson et al 2014, Ruegg et al 2014, Rushing et al 2014, Thorup et al 2014, Taylor et al 2017) but is equally relevant for migratory species of any taxonomic group (Sullivan et al 2012, Morrison and Bolger 2014, Quillfeldt et al 2015, Vander Zanden et al 2015, Acevedo et al 2017, Nishizawa et al 2018). Research on migratory connectivity has commonly focused on avian species (Bridge et al 2011, Hobson et al 2014, Ruegg et al 2014, Rushing et al 2014, Thorup et al 2014, Taylor et al 2017) but is equally relevant for migratory species of any taxonomic group (Sullivan et al 2012, Morrison and Bolger 2014, Quillfeldt et al 2015, Vander Zanden et al 2015, Acevedo et al 2017, Nishizawa et al 2018).…”

Section: Introductionmentioning

confidence: 99%

The strength of migratory connectivity for birds en route to breeding through the Gulf of Mexico

et al. 2018

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The strength of migratory connectivity is a measure of the cohesion of populations among phases of the annual cycle, including breeding, migration, and wintering. Many Nearctic-Neotropical species have strong migratory connectivity between breeding and wintering phases of the annual cycle. It is less clear if this strength persists during migration when multiple endogenous and exogenous factors may decrease the cohesion of populations among routes or through time along the same routes. We sampled three bird species, American redstart Setophaga ruticilla, ovenbird Seiurus aurocapilla, and wood thrush Hylocichla mustelina, during spring migration through the Gulf of Mexico region to test if breeding populations differentiate spatially among migration routes or temporally along the same migration routes and the extent to which withinpopulation timing is a function of sex, age, and carry-over from winter habitat, as measured by stable carbon isotope values in claws (δ 13 C). To make quantitative comparisons of migratory connectivity possible, we developed and used new methodology to estimate the strength of migratory connectivity (MC) from probabilistic origin assignments identified using stable hydrogen isotopes in feathers (δ 2 H). We found support for spatial differentiation among routes by American redstarts and ovenbirds and temporal differentiation along routes by American redstarts. After controlling for breeding origin, the timing of American redstart migration differed among ages and sexes and ovenbird migration timing was influenced by carry-over from winter habitat. The strength of migratory connectivity did not differ among the three species, with each showing weak breeding-to-spring migration MC relative to prior assessments of breeding-wintering connectivity. Our work begins to fill an essential gap in methodology and understanding of the extent to which populations remain together during migration, information critical for a full annual cycle perspective on the population dynamics and conservation of migratory animals.

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“…Stable isotopes are widely used powerful tools to infer the trophic position or geographical origin of a broad range of organisms including insects , Malausa et al 2005, Hobson et al 2012b, Sullivan et al 2012. Hydrogen has three stable isotopes, including 1 H and 2 H (also called deuterium).…”

Section: Introductionmentioning

confidence: 99%

Combination of morphometric and isotopic tools for studying spring migration dynamics in Episyrphus balteatus

2014

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Citation: Raymond, L., A. Vialatte, and M. Plantegenest. 2014. Combination of morphometric and isotopic tools for studying spring migration dynamics in Episyrphus balteatus. Ecosphere 5(7):88. http://dx.doi.org/10.1890/ES14-00075.1Abstract. Migration and population dynamics are important in organisms that provide ecosystem services as they determine the occurrence of individuals in a given place at a given time, which, in turn, determines the efficiency of the service provided. To design appropriate landscape management strategies to improve the efficiency of biological control, it is essential to know the origin of beneficial insects that colonize agricultural fields. However, studying migration dynamics in insects is complicated by their small size and short life span which largely prevent the use of conventional techniques based on capture-markrecapture, or remote sensing.Stable isotopes and morphological characters are intrinsic markers that can be used to infer the geographical origin of many organisms including insects. In this study, we first determined whether the hydrogen isotopic ratio and the wing morphometrics are appropriate markers to study the spring migration dynamics of a major aphidophagous hoverfly species (Episyrphus balteatus). To this end, we assessed the magnitude of variation of these indicators in seven populations along a north-south gradient in Western Europe. Second, we used the two markers in E. balteatus individuals collected in a French agricultural landscape over the course of the spring to assess the proportion of immigrants from southern regions and the period of immigration.Our results revealed uncertainties associated with the use of the hydrogen isotopic ratio and wing morphometrics, but showed that the spring population of E. balteatus in Western France very likely comprises mainly local individuals, with the probable arrival of some immigrants from nearby regions located further south. The low proportion of immigrants in the spring population has important implications for the biological control provided by E. balteatus in terms of landscape management strategies.

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Bat-cave catchment areas: using stable isotopes (δD) to determine the probable origins of hibernating bats

Cited by 14 publications

References 27 publications

Origins and migratory patterns of bats killed by wind turbines in southern Alberta: evidence from stable isotopes

Origins and migratory patterns of bats killed by wind turbines in southern Alberta: evidence from stable isotopes

The strength of migratory connectivity for birds en route to breeding through the Gulf of Mexico

Combination of morphometric and isotopic tools for studying spring migration dynamics in Episyrphus balteatus

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