Population genetics of the endangered Crowned Solitary Eagle (Buteogallus coronatus) in South America

Cañal, David; Roques, Séverine; Negro, Juan J.; Sarasola, José Hernán

doi:10.1007/s10592-016-0878-6

Cited by 10 publications

(6 citation statements)

References 21 publications

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“…Long generation times, such as occurs in vulture species, can buffer against loss of genetic diversity during bottlenecks (Hailer et al 2006). In small and declining populations, allelic diversity (loss of low-frequency alleles) decreases faster than heterozygosity (Nadeau 2012), so it might be that the demographic decline is too recent to detect signs of inbreeding in the population (Canal et al 2017). Additionally, after a bottleneck, excess gene diversity can be observed for a short time (Ganapathi et al 2012).…”

Section: Discussionmentioning

confidence: 99%

Genetic diversity is retained in a bottlenecked Cinereous Vulture population in Turkey

Çakmak

Pekşen

Kirazlı

et al. 2018

Ibis

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Vulture populations worldwide have suffered precipitous declines in recent decades. The Cinereous Vulture Aegypius monachus, a highly philopatric scavenger distributed across southern Europe and the central Asian plateau, is threatened in many parts of its range. Turkey holds the second largest population of this species in the Western Palaearctic, but there has been no research on its genetic structure and the possible implications of this structure for the future of the species. Here we report nuclear diversity and relatedness determined by short tandem repeat genotyping of 81 individuals from the four largest colonies. Our results demonstrated no significant genetic structuring, suggesting a single panmictic metapopulation connected by frequent dispersal. Furthermore, we show that the study population has retained moderate levels of genetic diversity, despite passing through a recent demographic bottleneck. We estimated the effective population size to be 112 individuals (95% confidence interval 74–201). Our results imply that the observed lack of increase in population size since the 1990s has not been caused by lowered fitness due to genetic inbreeding but rather by increased mortality via demographic processes. In the short term, we suggest that conservation efforts should treat the Turkish subpopulations as a single management unit and aim to increase population size through effective protection, especially during the breeding season.

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Section: Discussionmentioning

confidence: 99%

Genetic diversity is retained in a bottlenecked Cinereous Vulture population in Turkey

Çakmak

Pekşen

Kirazlı

et al. 2018

Ibis

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“…Organisms with moderate to high dispersal have higher recolonization potential (Albanese, Angermeier, & Peterson, ; Hanski & Simberloff, ) and less commonly exhibit reduced genetic diversity stemming from genetic drift and inbreeding, making them less vulnerable to extinction (Frankham, ; Whiteley, Fitzpatrick, Funk, & Tallmon, ). Species with limited dispersal ability and high habitat specificity typically have greater genetic structure and more risk of depleted genetic diversity (Pilger, Gido, Propst, Whitney, & Turner, ; Savage, Fremier, & Shaffer, ; Sterling, Reed, Noonan, & Warren, ) than those with high dispersal ability and generalist habitat requirements (Canal, Roques, Negro, & Sarasola, ; Reid, Wilson, Carl, & Zorn, ; Row et al, ). This trend is dictated primarily by the patchy distribution of specialist habitats.…”

Section: Introductionmentioning

confidence: 99%

“…Our focal taxon is the federally endangered Tuxedo Darter, Etheostoma lemniscatum (Figure 1). This endemic fish is found in only a 38.6 km reach of the mainstem Big South Fork River where its upstream range is constrained by a Class IV rapid, Angel Falls, that is thought to impede upstream movement (Davis & Cook, 2010), and its downstream range is limited due to inundation effects (e.g., sedimentation and reduced flow) from a reservoir created by Wolf Creek Dam in 1950 (Campbell, Risk, Andrews, Palmer-Bell, & MacGregor, 1990). This species is expected to show high levels of genetic structure, even at small spatial scales, since it is a habitat specialist with hypothesized limited dispersal ability (Centeno-Cuadros et al, 2011;Fluker, Kuhajda, & Harris, 2014).…”

mentioning

confidence: 99%

Small fish, large river: Surprisingly minimal genetic structure in a dispersal‐limited, habitat specialist fish

Washburn

Cashner

Blanton

2020

Ecology and Evolution

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Genetic connectivity is expected to be lower in species with limited dispersal ability and a high degree of habitat specialization (intrinsic factors). Also, gene flow is predicted to be limited by habitat conditions such as physical barriers and geographic distance (extrinsic factors). We investigated the effects of distance, intervening pools, and rapids on gene flow in a species, the Tuxedo Darter (Etheostoma lemniscatum), a habitat specialist that is presumed to be dispersal‐limited. We predicted that the interplay between these intrinsic and extrinsic factors would limit dispersal and lead to genetic structure even at the small spatial scale of the species range (a 38.6 km river reach). The simple linear distribution of E. lemniscatum allowed for an ideal test of how these factors acted on gene flow and allowed us to test expectations (e.g., isolation‐by‐distance) of linearly distributed species. Using 20 microsatellites from 163 individuals collected from 18 habitat patches, we observed low levels of genetic structure that were related to geographic distance and rapids, though these factors were not barriers to gene flow. Pools separating habitat patches did not contribute to any observed genetic structure. Overall, E. lemniscatum maintains gene flow across its range and is comprised of a single population. Due to the linear distribution of the species, a stepping‐stone model of dispersal best explains the maintenance of gene flow across its small range. In general, our observation of higher‐than‐expected connectivity likely stems from an adaptation to disperse due to temporally unstable and patchy habitat.

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“…Therefore, as golden eagles are long-lived (Watson, 2010), occupy vast geographical areas (BirdLife International & Handbook of the Birds of the World, 2022), and likely originate from several glacial refugia (Nebel et al , 2015; see above), these factors have undoubtedly played an important role in maintaining their genetic diversity. Similarly, high genetic diversity has been observed in other Eurasian raptors, such as the white-tailed eagle (Hailer et al , 2007), the cinerous vulture (Aegypius monachus , Poulakakis et al 2008), the crowned solitary eagle (Buteogallus coronatus ; Canal et al , 2017), and the greater spotted eagle (Väli et al , 2019).…”

Section: Temporal Genetic Variation and Demographic Historymentioning

confidence: 59%

A renewed glance at the Palearctic golden eagle: genetic variation in space and time

Karabanina,

Lansink,

Ponnikas

et al. 2023

Preprint

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Anthropogenic pressures on nature have been causing population declines for centuries. Intensified persecution of apex predators, like the golden eagle, resulted in population bottlenecks during the 19-20 centuries. To study population genetics and demographic history of the golden eagle throughout its distribution, we collected museum samples from previously underrepresented regions, such as Russia and Central Asia. We used 12 microsatellite loci and a fragment of the mitochondrial DNA control region to re-evaluate phylogeography of Eurasian golden eagles and study the impacts of the population bottleneck. Our results revealed a north-south genetic gradient, expressed by the difference of Mediterranean and Holarctic lineages, as well as genetically distinct Northern Europe and Central Asia and Caucasus regions. Furthermore, Northern Europe exhibited the lowest, whereas Central Asia and Caucasus had the highest genetic diversity. Although golden eagles maintained relatively high genetic diversity, we detected genetic signatures of the recent bottleneck, including reduced genetic diversity and a decline in the effective female population size around the year 1975. Our study improves the knowledge of the genetic composition of Eurasian golden eagles and highlights the importance of understanding their historical population dynamics in the face of ongoing and future conservation efforts.

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Population genetics of the endangered Crowned Solitary Eagle (Buteogallus coronatus) in South America

Cited by 10 publications

References 21 publications

Genetic diversity is retained in a bottlenecked Cinereous Vulture population in Turkey

Genetic diversity is retained in a bottlenecked Cinereous Vulture population in Turkey

Small fish, large river: Surprisingly minimal genetic structure in a dispersal‐limited, habitat specialist fish

A renewed glance at the Palearctic golden eagle: genetic variation in space and time

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