Mapping migration in a songbird using high-resolution genetic markers

Ruegg, Kristen; Anderson, Eric C.; Paxton, Kristina L.; Apkenas, Vanessa; Lao, Sirena; Siegel, Rodney B.; DeSante, David F.; Moore, Frank R.; Smith, Thomas B.

doi:10.1101/007757

Cited by 52 publications

(157 citation statements)

References 55 publications

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“…Kevan & Kendall, 1997). Isotopic data could also be combined with other techniques to potentially refine origin assignments, such as pollen analysis (Hendrix et al, 1992) or the use of molecular markers through the creation of genescapes (Rundel et al, 2013;Ruegg et al, 2014), as with previous studies on the fall armyworm (Nagoshi et al, 2007;Westbrook et al, 2016). For example, if 13 C and 15 N values of immigrants are consistent with values expected from the landuse patterns we have described and if they are similar to those we measured in 2016, then one could limit investigations to unfertilised C3 ecosystems and exclude C4 agroecosystems as potential sources of immigrants.…”

Section: Discussionmentioning

confidence: 99%

Inferring origins of migrating insects using isoscapes: a case study using the true armyworm, Mythimna unipuncta, in North America

Hobson

Doward

Kardynal

et al. 2018

Ecological Entomology

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1. Many important insect pests undertake seasonal migrations at continental scales in response to changes in resource quality and availability. The frequency and timing of these events could be influenced by the impact of climate change on the suitability of the different sites exploited throughout the year, yet, in many cases, little is known about the origin of seasonal populations, as tracking insect movements is extremely challenging due to their small body size.2. The use of stable isotope measurements in insect tissues combined with the development of tissue-specific 'isoscapes' of modelled geographic isotope patterns presents a potentially valuable but rarely used approach for obtaining such information on important pest species. In this paper it is illustrated how stable hydrogen isotope analyses ( 2 H) in wing chitin of the true armyworm (Mythimna (Psuedaletia) unipuncta Haworth), a seasonal migrant, clearly delineated between 2016 spring immigrants and later locally produced moths in southern Ontario, Canada.3. It is shown that adult moths captured in early fall in Texas were immigrants from farther north, the first direct confirmation of a southward return migration of this species. Stable carbon isotope ( 13 C) measurements indicated that spring immigrants in Ontario and autumn immigrants in Texas were from exclusively C3 biomes. Stable nitrogen isotope ( 15 N) measurements also provided information on the probability of individuals coming from agriculturally intensive (i.e. higher 15 N) sites. Finally, several recommendations are provided regarding future research that could improve the Bayesian assignment models and thus improve assignment accuracy.

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Section: Discussionmentioning

confidence: 99%

Inferring origins of migrating insects using isoscapes: a case study using the true armyworm, Mythimna unipuncta, in North America

Hobson

Doward

Kardynal

et al. 2018

Ecological Entomology

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“…The solid line is the predicted trajectory of d 2 H f values from the following models: (a) d 2 H f = À410.9 + 131.8*Lat + -13.7*Lat 2 , where Lat is the latitude of the sampling sites in the Colombian Andes, and (b) d 2 H f = 621.7 + 9.7*Lon, where Lon is the longitude of the sampling sites in the Colombian Andes. Molecular approaches could help us understand whether the winter distribution of Canada Warblers across the Colombian Andes is maintained by population genetic structure, as has been shown for closely related species overwintering elsewhere in the Neotropics (Ruegg et al, 2014). and the high levels of biodiversity observed in the Neotropics today .…”

Section: Migratory Connectivity and Its Originsmentioning

confidence: 99%

Topography of the Andes Mountains shapes the wintering distribution of a migratory bird

González-Prieto

Bayly

Colorado

et al. 2016

Diversity and Distributions

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Aim In birds, patterns of migratory connectivity are influenced by landscape structure experienced throughout the annual cycle. Assessing how landscape patterns drive the movements and distributions of migratory species is important for understanding the evolution of migration and determining conservation priorities. We determined migratory connectivity in the Canada Warbler (Cardellina canadensis), a declining Neotropical migratory bird, and evaluated the degree to which the Andean mountains influence winter population distribution in this montane forest specialist. Location Seven study regions across the Western, Central, and Eastern Andes of Colombia. Methods We inferred breeding and natal origins of Canada Warblers overwintering in Colombia by analysing stable hydrogen isotope values (δ2H) in feathers and assigning wintering populations to breeding origins using an established feather δ2H isoscape for North America. Results We found strong evidence for parallel migration between breeding and wintering sites, giving rise to moderately strong migratory connectivity between breeding and wintering regions. The model best explaining population distribution in the Colombian Andes implied that populations were most similar within basins or valleys. Such segregation is notable, given that basins are separated by less than 300 km on the wintering grounds, while breeding populations may be separated by more than 3000 km from east to west. Main conclusions Our results suggest that the high spine of each Andean cordillera acts to shape the winter distribution of individuals from different breeding populations. To our knowledge, this is the first demonstration that the topography of the Andean mountains can act to shape the winter distribution of populations of a migratory bird. The strength of migratory connectivity found in Canada Warblers may inhibit evolutionary responses to environmental change, and the more rapid population declines recorded in some eastern breeding populations may be related to habitat loss and local environmental conditions in the Eastern Andes, where individuals from these populations were more likely to overwinter.

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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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Mapping migration in a songbird using high-resolution genetic markers

Cited by 52 publications

References 55 publications

Inferring origins of migrating insects using isoscapes: a case study using the true armyworm, Mythimna unipuncta, in North America

Inferring origins of migrating insects using isoscapes: a case study using the true armyworm, Mythimna unipuncta, in North America

Topography of the Andes Mountains shapes the wintering distribution of a migratory bird

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

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