Population structure of a grassland songbird (Dolichonyx oryzivorus) to inform conservation units

Renfrew, Rosalind B.; Perlut, Noah G.; Maxwell, Logan M.; Cadman, Mike; Kim, Daniel H.; Clucas, Gemma V.; Kovach, Adrienne I.

doi:10.1007/s10531-021-02321-5

Cited by 2 publications

(18 citation statements)

References 61 publications

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“…The nine Galápagos samples presented here were sequenced in conjunction with 174 samples collected from seven populations (Figure 1 ) in the Bobolink breeding range, as part of a study on population structure (Renfrew et al, 2021 ). Analyzing these datasets together (total of 183 individuals) allowed for determining breeding population of origin for the birds caught in Galápagos.…”

Section: Methodsmentioning

confidence: 99%

“…Analyzing these datasets together (total of 183 individuals) allowed for determining breeding population of origin for the birds caught in Galápagos. The seven breeding sampling locations of origin—Ontario, New Brunswick, Vermont, North Dakota, Nebraska, Oregon, and British Columbia—were structured into four genetically distinct regions/populations—East (Ontario, New Brunswick, and Vermont), Midwest (North Dakota and Nebraska), Oregon, and British Columbia (Renfrew et al, 2021 ).…”

Section: Methodsmentioning

confidence: 99%

“…We created double‐digest restriction‐site‐associated (ddRAD) sequencing libraries for the nine Galápagos samples in this study and the 174 Bobolink breeding population samples, following the Peterson et al ( 2012 ) protocol, as described in Renfrew et al ( 2021 ). Briefly, we digested 200–500 ng of DNA with the enzymes SbfI and MsPI, followed by ligation of P1/P2 adapters using T4 DNA ligase.…”

Section: Methodsmentioning

confidence: 99%

“…Bioinformatic data processing and SNP identification are also described in Renfrew et al ( 2021 ). In summary, we checked all raw DNA sequences for quality using FastQC (Andrews, 2010 ).…”

Section: Methodsmentioning

confidence: 99%

“…Here, we use genetic analyses to examine the breeding origins of Bobolinks that stop in Galápagos during their southbound migration. We assign individuals to their breeding region based on the known genetic population structure of Bobolink across its breeding range (Renfrew et al, 2021 ) using two genetic assignment methods, and we assess whether they originated from a single, local breeding area by determining their genetic relatedness.…”

Section: Introductionmentioning

confidence: 99%

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Breeding origins of a uniquely regular migrant songbird in the Galápagos Islands

Perlut

Maxwell

Kovach

et al. 2023

Ecology and Evolution

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Little is known about the causes and consequences of alternative pathways flown by long-distance migratory birds. Bobolinks (Dolichonyx oryzivorus) breed in grasslands across northern North America and migrate from their breeding grounds toward the eastern Atlantic Coast and then proceed through the Caribbean to South America. However, a small but regular number of Bobolinks have been recorded on the Galapagos Islands. We collected genetic samples from nine Galapagos Bobolinks and performed double-digest restriction site-associated sequencing. We compared them with samples from seven locations across their breeding distribution to determine their population of origin. Galapagos Bobolinks shared the genetic structure of a cluster in the eastern portion of the breeding range that includes New Brunswick and Ontario, Canada, and Vermont, United States. Genetic assignment tests largely corroborated this finding, although slightly different results were obtained for the two methods. All individuals were assigned to the Ontario breeding population using AssignPop, while Rubias assigned six of the migrants to Ontario and three to a Midwest breeding population. Low average relatedness among Galapagos individuals indicates that they are not more related to one another than to individuals within a breeding population and are therefore likely not from a single, small isolated population. Our results do not support the probability hypothesis-that Galapagos Bobolinks originated from the region that includes the greatest proportion of their breeding range (Great Plains)-or the vagrant hypothesis-that migrants are displaced onto Galapagos due to weather events. Instead, our findings support the proximity hypothesis, where migrants originate from the geographically closest-breeding populations.

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

“…Bioinformatic data processing and SNP identification are also described in Renfrew et al ( 2021 ). In summary, we checked all raw DNA sequences for quality using FastQC (Andrews, 2010 ).…”

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Breeding origins of a uniquely regular migrant songbird in the Galápagos Islands

Perlut

Maxwell

Kovach

et al. 2023

Ecology and Evolution

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Applying molecular genetic data at different scales to support conservation assessment of European Habitats Directive listed species: A case study of Eurasian otter in Austria

Schenekar,

Weiss,

Weiss

2023

Evolutionary Applications

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Evaluating intraspecific genetic structure and diversity is fundamental to assessing a species’ conservation status, but direct incorporation of such information into legal frameworks such as the EU's Habitats Directive is surprisingly rare. How genetic structure aligns with EU member state boundaries or biogeographic regions may be very important in designing management plans or achieving legislative goals. The Eurasian fish otter experienced a sharp population decline during the 20th century but is currently re‐expanding in several countries. The species is listed under Annex II and IV of the European Habitats Directive, and member states are obliged to assess the species separately across different biogeographic regions. We genotyped 2492 otter spraints across four provinces in Austria, collected between 2017 and 2021. A total of 384 different genotypes were identified, supporting densities along river habitats from 0.1 to 0.47 otters per river km (mean: 0.306), with a resampling‐based simulation supporting limited density overestimation at survey lengths of 20 km or more. Three distinct genetic clusters were revealed, two of them presumably reflecting two relict populations whereas the source of the third cluster is unknown. The geographic extent of the three clusters does not coincide with provincial or biogeographic boundaries, both relevant for assessment and management within existing national or European legislative frameworks. We advocate more consideration of genetic structure in the assessment and conservation management planning of species listed in the European Habitats Directive.

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Population structure of a grassland songbird (Dolichonyx oryzivorus) to inform conservation units

Cited by 2 publications

References 61 publications

Breeding origins of a uniquely regular migrant songbird in the Galápagos Islands

Breeding origins of a uniquely regular migrant songbird in the Galápagos Islands

Applying molecular genetic data at different scales to support conservation assessment of European Habitats Directive listed species: A case study of Eurasian otter in Austria

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