Restricted gene flow and fine-scale population structuring in tool using New Caledonian crows

Abstract Wildlife management in rapid changing landscapes requires critical planning through cross cutting networks, and understanding of landscape features, often affected by the anthropogenic activities. The present study demonstrates fine-scale spatial patterns of genetic variation and contemporary gene flow of red panda (Ailurus fulgens) populations with respect to landscape connectivity in Kangchenjunga Landscape (KL), India. The study found about 1,309.54 km2 area suitable for red panda in KL—India, of which 62.21% area fell under the Protected Area network. We identified 24 unique individuals from 234 feces collected at nine microsatellite loci. The spatially explicit and non-explicit Bayesian clustering algorithms evident to exhibit population structuring and supported red panda populations to exist in meta-population frame work. In concurrence to the habitat suitability and landscape connectivity models, gene flow results supported a contemporary asymmetric movement of red panda by connecting KL—India in a crescent arc. We demonstrate the structural-operational connectivity of corridors in KL—India that facilitated red panda movement in the past. We also seek for cooperation in Nepal, Bhutan and China to aid in preparing for a comprehensive monitoring plan for the long-term conservation and management of red panda in trans-boundary landscapes.

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Staying close: short local dispersal distances on a managed forest of two Patagonian Nothofagus species

Forestry An International Journal of Forest Research ◽

10.1093/forestry/cpaa008 ◽

2020 ◽

Vol 93 (5) ◽

pp. 652-661 ◽

Cited By ~ 2

Author(s):

Georgina Sola ◽

Verónica El Mujtar ◽

Leonardo Gallo ◽

Giovanni G Vendramin ◽

Paula Marchelli

Keyword(s):

Gene Flow ◽

Genetic Structure ◽

Spatial Genetic Structure ◽

Pollen Dispersal ◽

Dispersal Distance ◽

Restricted Gene Flow ◽

Fine Scale ◽

Gene Dispersal ◽

Mature Trees ◽

The Impact

Abstract Understanding the impact of management on the dispersal potential of forest tree species is pivotal in the context of global change, given the implications of gene flow on species evolution. We aimed to determine the effect of logging on gene flow distances in two Nothofagus species from temperate Patagonian forests having high ecological relevance and wood quality. Therefore, a total of 778 individuals (mature trees and saplings) of Nothofagus alpina and N. obliqua, from a single plot managed 20 years ago (2.85 hectares), were mapped and genotyped at polymorphic nuclear microsatellite loci. Historical estimates of gene dispersal distance (based on fine-scale spatial genetic structure) and contemporary estimates of seed and pollen dispersal (based on spatially explicit mating models) were obtained. The results indicated restricted gene flow (gene distance ≤ 45 m, both pollen and seed), no selfing and significant seed and pollen immigration from trees located outside the studied plot but in the close surrounding area. The size of trees (diameter at breast height and height) was significantly associated with female and/or male fertility. The significant fine-scale spatial genetic structure was consistent with the restricted seed and pollen dispersal. Moreover, both estimates of gene dispersal (historical and contemporary) gave congruent results. This suggests that the recent history of logging within the study area has not significantly influenced on patterns of gene flow, which can be explained by the silviculture applied to the stand. The residual tree density maintained species composition, and the homogeneous spatial distribution of trees allowed the maintenance of gene dispersal. The short dispersal distance estimated for these two species has several implications both for understanding the evolution of the species and for defining management, conservation and restoration actions. Future replication of this study in other Nothofagus Patagonian forests would be helpful to validate our conclusions.

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Microsatellite gene diversity analysis in anadromous arctic char, Salvelinus alpinus, from Labrador, Canada

Canadian Journal of Fisheries and Aquatic Sciences ◽

10.1139/f97-325 ◽

1998 ◽

Vol 55 (5) ◽

pp. 1264-1272 ◽

Cited By ~ 28

Author(s):

Louis Bernatchez ◽

J Brian Dempson ◽

Sylvain Martin

Keyword(s):

Mitochondrial Dna ◽

Salvelinus Alpinus ◽

Gene Diversity ◽

Arctic Char ◽

Diversity Analysis ◽

Fine Scale ◽

Geographic Scale ◽

Scale Population ◽

Population Structuring ◽

Heterozygous Deficiency

We analysed six loci among 257 Arctic char (Salvelinus alpinus) representing seven locations in Labrador and Newfoundland to provide a first assessment of microsatellites gene diversity in anadromous char and to determine the geographic scale of population structuring within the species. The number of alleles per locus varied between 9 and 48, and gene diversity ranged from 0.190 to 0.968. Significant FST and differences in allele frequencies were observed among most samples, as well as heterozygous deficiency, which was indicative of a Wahlund's effect. These results implied the existence of genetically distinct populations on a microgeographic scale (less than 10 km) and that our samples represented an admixture of char from those populations that interchange among rivers for owerwintering, in congruence with tagging investigations. These results indicate that microsatellites potentially offer more sensitivity than allozymes and mitochondrial DNA to infer fine-scale population structure in anadromous arctic char.

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Restricted gene flow in the endangered Capricorn Yellow Chat Epthianura crocea macgregori: consequences for conservation management

Bird Conservation International ◽

10.1017/s0959270917000284 ◽

2017 ◽

Vol 28 (1) ◽

pp. 116-125 ◽

Cited By ~ 1

Author(s):

WAYNE A. HOUSTON ◽

WILLIAM J. ASPDEN ◽

ROD ELDER ◽

ROBERT L. BLACK ◽

LINDA E. NEAVES ◽

...

Keyword(s):

Genetic Diversity ◽

Gene Flow ◽

Industrial Development ◽

Management Practices ◽

Geographic Area ◽

Restricted Gene Flow ◽

Sea Levels ◽

Population Structuring ◽

Epbc Act ◽

Two Populations

SummaryThe Yellow Chat Epthianura crocea is comprised of three disjunct subspecies. Subspecies E. c. macgregori (Capricorn Yellow Chat) is listed as Critically Endangered under the EPBC Act and has a distribution that also appears to be disjunct, with a limited geographic area of less than 7,000 ha. Some populations are threatened by rapid industrial development, and it is important for conservation of the subspecies to determine the extent to which the putative populations are connected. We used 14 microsatellite markers to measure genetic diversity and to determine the extent of gene flow between two disjunct populations at the northern and southern extremes of the subspecies’ range. No significant differences in genetic diversity (number of alleles and heterozygosity) were observed, but clear population structuring was apparent, with obvious differentiation between the northern and southern populations. The most likely explanation for reduced gene flow between the two populations is either the development of a geographic barrier as a consequence of shrinkage of the marine plains associated with the rise in sea levels following the last glacial maxima, or reduced connectivity across the largely unsuitable pasture and forest habitat that now separates the two populations, exacerbated by declining population size and fewer potential emigrants. Regardless of the mechanism, restricted gene flow between these two populations has important consequences for their ongoing conservation. The relative isolation of the smaller southern groups (the Fitzroy River delta and Curtis Island) from the much larger northern group (both sides of the Broad Sound) makes the southern population more vulnerable to local extinction. Conservation efforts should focus on nature refuge agreements with land owners agreeing to maintain favourable grazing management practices in perpetuity, particularly in the northern area where most chats occur. Supplemental exchanges of individuals from northern and southern populations should be explored as a way of increasing genetic diversity and reducing inbreeding.

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Fine-scale population differentiation and gene flow in a terrestrial salamander (Plethodon cinereus) living in continuous habitat

Heredity ◽

10.1038/sj.hdy.6800905 ◽

2006 ◽

Vol 98 (1) ◽

pp. 53-60 ◽

Cited By ~ 74

Author(s):

P R Cabe ◽

R B Page ◽

T J Hanlon ◽

M E Aldrich ◽

L Connors ◽

...

Keyword(s):

Gene Flow ◽

Population Differentiation ◽

Plethodon Cinereus ◽

Fine Scale ◽

Scale Population

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Evidence of Recent Fine-Scale Population Structuring in South American Puma concolor

Diversity ◽

10.3390/d9040044 ◽

2017 ◽

Vol 9 (4) ◽

pp. 44 ◽

Cited By ~ 1

Author(s):

Bruno Saranholi ◽

Karla Chávez-Congrains ◽

Pedro Galetti

Keyword(s):

Puma Concolor ◽

South American ◽

Fine Scale ◽

Scale Population ◽

Population Structuring

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Fine scale population structure of dugongs (Dugong dugon) implies low gene flow along the southern Queensland coastline

Conservation Genetics ◽

10.1007/s10592-014-0624-x ◽

2014 ◽

Vol 15 (6) ◽

pp. 1381-1392 ◽

Cited By ~ 9

Author(s):

Jennifer M. Seddon ◽

Jennifer R. Ovenden ◽

Helen L. Sneath ◽

Damien Broderick ◽

Christine L. Dudgeon ◽

...

Keyword(s):

Population Structure ◽

Gene Flow ◽

Fine Scale ◽

Scale Population

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The empirical Bayes estimators of fine-scale population structure in high gene flow species

Molecular Ecology Resources ◽

10.1111/1755-0998.12663 ◽

2017 ◽

Vol 17 (6) ◽

pp. 1210-1222 ◽

Cited By ~ 13

Author(s):

Shuichi Kitada ◽

Reiichiro Nakamichi ◽

Hirohisa Kishino

Keyword(s):

Population Structure ◽

Gene Flow ◽

Empirical Bayes ◽

Fine Scale ◽

Bayes Estimators ◽

High Gene Flow ◽

Scale Population ◽

High Gene ◽

Empirical Bayes Estimators

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Fine-scale landscape genetics unveiling contemporary asymmetric movement of red panda (Ailurus fulgens) in Kangchenjunga landscape, India

10.1101/2020.08.26.268532 ◽

2020 ◽

Author(s):

Supriyo Dalui ◽

Hiren Khatri ◽

Sujeet Kumar Singh ◽

Shambadeb Basu ◽

Avijit Ghosh ◽

...

Keyword(s):

Gene Flow ◽

Landscape Connectivity ◽

Anthropogenic Activities ◽

Clustering Algorithms ◽

Area Network ◽

Fine Scale ◽

Contemporary Gene Flow ◽

Red Panda ◽

Population Structuring ◽

Ailurus Fulgens

AbstractWildlife management in rapid changing landscapes requires critical planning through cross cutting networks, and understanding of landscape features, often affected by the anthropogenic activities. The present study demonstrates fine-scale spatial patterns of genetic variation and contemporary gene flow of red panda (Ailurus fulgens) populations with respect to landscape connectivity in Kangchenjunga Landscape (KL), India. The study found about 1309.54 Km2 area suitable for red panda in KL-India, of which 62.21% area fell under the Protected Area network. We identified 24 unique individuals from 234 feces collected at nine microsatellite loci. The spatially explicit and non-explicit Bayesian clustering algorithms evident to exhibit population structuring and supported red panda populations to exist in meta-population frame work. In concurrence to the habitat suitability and landscape connectivity models, gene flow results supported a contemporary asymmetric movement of red panda by connecting KL- India in a crescent arc. We demonstrate the structural-operational connectivity of corridors in KL-India that facilitated red panda movement in the past. We also seek for cooperation in Nepal, Bhutan and China to aid in preparing for a comprehensive monitoring plan for the long-term conservation and management of red panda in trans-boundary landscapes.

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