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Cetkovská E, Brandlová K, Ogden R, Černá Bolfíková B. Evaluation of the Impact of Population Management on the Genetic Parameters of Selected Spiral-Horned Antelopes. BIOLOGY 2024; 13:104. [PMID: 38392322 PMCID: PMC10886411 DOI: 10.3390/biology13020104] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/29/2023] [Revised: 01/25/2024] [Accepted: 01/30/2024] [Indexed: 02/24/2024]
Abstract
The rapid loss of biodiversity and the associated reduction and fragmentation of habitats means that ex situ populations have become an important part of species conservation. These populations, which are often established from a small number of founders, require careful management to avoid the negative effects of genetic drift and inbreeding. Although the inclusion of molecular data is recommended, their availability for captive breeding management remains limited. The aim of this study was to evaluate the relationship between the levels of genetic diversity in six spiral-horned antelope taxa bred under human care and their respective management strategies, conservation status, demography, and geographic origin, using 10 nuclear DNA microsatellite loci and mitochondrial control region DNA sequences. Our findings include associations between genetic diversity and management intensity but also with the diversity and contribution of wild populations to captive founders, with some populations apparently composed of animals from divergent wild lineages elevating captive genetic diversity. When population sizes are large, the potential advantages of maximizing genetic diversity in widely outcrossed populations may need careful consideration with respect to the potential disruption of adaptive diversity. Genetic data serve as a robust tool for managing captive populations, yet their interpretation necessitates a comprehensive understanding of species biology and history.
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Affiliation(s)
- Ema Cetkovská
- Faculty of Tropical AgriSciences, Czech University of Life Sciences Prague, Kamycka 129, 16500 Prague, Czech Republic
| | - Karolína Brandlová
- Faculty of Tropical AgriSciences, Czech University of Life Sciences Prague, Kamycka 129, 16500 Prague, Czech Republic
| | - Rob Ogden
- Royal (Dick) School of Veterinary Studies and the Roslin Institute, University of Edinburgh, Midlothian EH25 9RG, UK
| | - Barbora Černá Bolfíková
- Faculty of Tropical AgriSciences, Czech University of Life Sciences Prague, Kamycka 129, 16500 Prague, Czech Republic
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2
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Nistelberger HM, Roycroft E, Macdonald AJ, McArthur S, White LC, Grady PGS, Pierson J, Sims C, Cowen S, Moseby K, Tuft K, Moritz C, Eldridge MDB, Byrne M, Ottewell K. Genetic mixing in conservation translocations increases diversity of a keystone threatened species, Bettongia lesueur. Mol Ecol 2023. [PMID: 37715549 DOI: 10.1111/mec.17119] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2023] [Revised: 07/11/2023] [Accepted: 08/17/2023] [Indexed: 09/17/2023]
Abstract
Translocation programmes are increasingly being informed by genetic data to monitor and enhance conservation outcomes for both natural and established populations. These data provide a window into contemporary patterns of genetic diversity, structure and relatedness that can guide managers in how to best source animals for their translocation programmes. The inclusion of historical samples, where possible, strengthens monitoring by allowing assessment of changes in genetic diversity over time and by providing a benchmark for future improvements in diversity via management practices. Here, we used reduced representation sequencing (ddRADseq) data to report on the current genetic health of three remnant and seven translocated boodie (Bettongia lesueur) populations, now extinct on the Australian mainland. In addition, we used exon capture data from seven historical mainland specimens and a subset of contemporary samples to compare pre-decline and current diversity. Both data sets showed the significant impact of population founder source (whether multiple or single) on the genetic diversity of translocated populations. Populations founded by animals from multiple sources showed significantly higher genetic diversity than the natural remnant and single-source translocation populations, and we show that by mixing the most divergent populations, exon capture heterozygosity was restored to levels close to that observed in pre-decline mainland samples. Relatedness estimates were surprisingly low across all contemporary populations and there was limited evidence of inbreeding. Our results show that a strategy of genetic mixing has led to successful conservation outcomes for the species in terms of increasing genetic diversity and provides strong rationale for mixing as a management strategy.
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Affiliation(s)
- Heidi M Nistelberger
- Biodiversity and Conservation Science, Department of Biodiversity, Conservation and Attractions, Kensington, Western Australia, Australia
| | - Emily Roycroft
- Division of Ecology & Evolution, Research School of Biology, ANU College of Science, The Australian National University, Canberra, Australian Capital Territory, Australia
| | - Anna J Macdonald
- Division of Ecology & Evolution, Research School of Biology, ANU College of Science, The Australian National University, Canberra, Australian Capital Territory, Australia
| | - Shelley McArthur
- Biodiversity and Conservation Science, Department of Biodiversity, Conservation and Attractions, Kensington, Western Australia, Australia
| | - Lauren C White
- Department of Environment, Land, Water and Planning, Arthur Rylah Institute for Environmental Research, Heidelberg, Victoria, Australia
| | - Patrick G S Grady
- Department of Molecular and Cell Biology, University of Connecticut, Storrs, Connecticut, USA
| | - Jennifer Pierson
- Australian Wildlife Conservancy, Subiaco, Western Australia, Australia
| | - Colleen Sims
- Biodiversity and Conservation Science, Department of Biodiversity, Conservation and Attractions, Kensington, Western Australia, Australia
| | - Saul Cowen
- Biodiversity and Conservation Science, Department of Biodiversity, Conservation and Attractions, Kensington, Western Australia, Australia
| | - Katherine Moseby
- Centre for Ecosystem Science, School of Biological, Earth and Environmental Sciences, University of New South Wales, Sydney, New South Wales, Australia
| | | | - Craig Moritz
- Division of Ecology & Evolution, Research School of Biology, ANU College of Science, The Australian National University, Canberra, Australian Capital Territory, Australia
| | - Mark D B Eldridge
- Terrestrial Vertebrates, Australian Museum Research Institute, Sydney, New South Wales, Australia
| | - Margaret Byrne
- Biodiversity and Conservation Science, Department of Biodiversity, Conservation and Attractions, Kensington, Western Australia, Australia
| | - Kym Ottewell
- Biodiversity and Conservation Science, Department of Biodiversity, Conservation and Attractions, Kensington, Western Australia, Australia
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3
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von Takach B, Sargent H, Penton CE, Rick K, Murphy BP, Neave G, Davies HF, Hill BM, Banks SC. Population genomics and conservation management of the threatened black-footed tree-rat (Mesembriomys gouldii) in northern Australia. Heredity (Edinb) 2023; 130:278-288. [PMID: 36899176 PMCID: PMC10162988 DOI: 10.1038/s41437-023-00601-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2022] [Revised: 02/02/2023] [Accepted: 02/06/2023] [Indexed: 03/12/2023] Open
Abstract
Genomic diversity is a fundamental component of Earth's total biodiversity, and requires explicit consideration in efforts to conserve biodiversity. To conserve genomic diversity, it is necessary to measure its spatial distribution, and quantify the contribution that any intraspecific evolutionary lineages make to overall genomic diversity. Here, we describe the range-wide population genomic structure of a threatened Australian rodent, the black-footed tree-rat (Mesembriomys gouldii), aiming to provide insight into the timing and extent of population declines across a large region with a dearth of long-term monitoring data. By estimating recent trajectories in effective population sizes at four localities, we confirm widespread population decline across the species' range, but find that the population in the peri-urban area of the Darwin region has been more stable. Based on current sampling, the Melville Island population made the greatest contribution to overall allelic richness of the species, and the prioritisation analysis suggested that conservation of the Darwin and Cobourg Peninsula populations would be the most cost-effective scenario to retain more than 90% of all alleles. Our results broadly confirm current sub-specific taxonomy, and provide crucial data on the spatial distribution of genomic diversity to help prioritise limited conservation resources. Along with additional sampling and genomic analysis from the far eastern and western edges of the black-footed tree-rat distribution, we suggest a range of conservation and research priorities that could help improve black-footed tree-rat population trajectories at large and fine spatial scales, including the retention and expansion of structurally complex habitat patches.
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Affiliation(s)
- Brenton von Takach
- School of Molecular and Life Sciences, Curtin University, Perth, WA, Australia
- Research Institute for the Environment and Livelihoods, Charles Darwin University, Darwin, NT, 0909, Australia
| | - Holly Sargent
- Research Institute for the Environment and Livelihoods, Charles Darwin University, Darwin, NT, 0909, Australia
| | - Cara E Penton
- Warddeken Land Management Ltd, Darwin, NT, Australia
| | - Kate Rick
- School of Biological Sciences, The University of Western Australia, Crawley, WA, 6009, Australia
| | - Brett P Murphy
- Research Institute for the Environment and Livelihoods, Charles Darwin University, Darwin, NT, 0909, Australia
| | - Georgina Neave
- Research Institute for the Environment and Livelihoods, Charles Darwin University, Darwin, NT, 0909, Australia
| | - Hugh F Davies
- Research Institute for the Environment and Livelihoods, Charles Darwin University, Darwin, NT, 0909, Australia
| | - Brydie M Hill
- Flora and Fauna Division, Department of Environment, Parks and Water Security, Northern Territory Government, Berrimah, NT, 0831, Australia
| | - Sam C Banks
- Research Institute for the Environment and Livelihoods, Charles Darwin University, Darwin, NT, 0909, Australia.
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4
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Undin M, Castro I. Predicting breeding systems to guide conservation strategies: A kiwi example. Ethology 2022. [DOI: 10.1111/eth.13286] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Malin Undin
- Department of Natural Sciences Mid Sweden University Sundsvall Sweden
- Wildlife and Ecology Group, School of Agriculture and Environment Massey University Palmerston North New Zealand
| | - Isabel Castro
- Wildlife and Ecology Group, School of Agriculture and Environment Massey University Palmerston North New Zealand
- Wildbase Research Massey University Palmerston North New Zealand
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5
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Wright AL, Anson JR, Leo V, Wright BR, Newsome TM, Grueber CE. Urban restoration of common species: population genetics of reintroduced native bush rats
Rattus fuscipes
in Sydney, Australia. Anim Conserv 2022. [DOI: 10.1111/acv.12787] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- A. L. Wright
- School of Life and Environmental Sciences, Faculty of Science The University of Sydney Sydney NSW Australia
| | - J. R. Anson
- Australian Wildlife Conservancy Perth WA Australia
| | - V. Leo
- Australian Wildlife Conservancy Perth WA Australia
| | - B. R. Wright
- School of Life and Environmental Sciences, Faculty of Science The University of Sydney Sydney NSW Australia
- Sydney School of Veterinary Sciences The University of Sydney Faculty of Science, The University of Sydney Sydney NSW Australia
| | - T. M. Newsome
- School of Life and Environmental Sciences, Faculty of Science The University of Sydney Sydney NSW Australia
| | - C. E. Grueber
- School of Life and Environmental Sciences, Faculty of Science The University of Sydney Sydney NSW Australia
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6
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Alvarez‐Estape M, Fontsere C, Serres‐Armero A, Kuderna LFK, Dobrynin P, Guidara H, Pukazhenthi BS, Koepfli K, Marques‐Bonet T, Moreno E, Lizano E. Insights from the rescue and breeding management of Cuvier's gazelle ( Gazella cuvieri) through whole-genome sequencing. Evol Appl 2022; 15:351-364. [PMID: 35386395 PMCID: PMC8965372 DOI: 10.1111/eva.13336] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2021] [Accepted: 12/03/2021] [Indexed: 11/29/2022] Open
Abstract
Captive breeding programmes represent the most intensive type of ex situ population management for threatened species. One example is the Cuvier's gazelle programme that started in 1975 with only four founding individuals, and after more than four decades of management in captivity, a reintroduction effort was undertaken in Tunisia in 2016, to establish a population in an area historically included within its range. Here, we aim to determine the genetic consequences of this reintroduction event by assessing the genetic diversity of the founder stock as well as of their descendants. We present the first whole-genome sequencing dataset of 30 Cuvier's gazelles including captive-bred animals, animals born in Tunisia after a reintroduction and individuals from a genetically unrelated Moroccan population. Our analyses revealed no difference between the founder and the offspring cohorts in genome-wide heterozygosity and inbreeding levels, and in the amount and length of runs of homozygosity. The captive but unmanaged Moroccan gazelles have the lowest genetic diversity of all genomes analysed. Our findings demonstrate that the Cuvier's gazelle captive breeding programme can serve as source populations for future reintroductions of this species. We believe that this study can serve as a starting point for global applications of genomics to the conservation plan of this species.
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Affiliation(s)
| | | | | | | | - Pavel Dobrynin
- Computer Technologies LaboratoryITMO UniversitySt. PetersburgRussian Federation
- Center for Species SurvivalNational Zoological ParkSmithsonian Conservation Biology InstituteFront RoyalVirginiaUSA
- Center for Species SurvivalNational Zoological ParkSmithsonian Conservation Biology InstituteWashingtonDistrict of ColumbiaUSA
| | | | - Budhan S. Pukazhenthi
- Center for Species SurvivalNational Zoological ParkSmithsonian Conservation Biology InstituteFront RoyalVirginiaUSA
- Center for Species SurvivalNational Zoological ParkSmithsonian Conservation Biology InstituteWashingtonDistrict of ColumbiaUSA
| | - Klaus‐Peter Koepfli
- Computer Technologies LaboratoryITMO UniversitySt. PetersburgRussian Federation
- Center for Species SurvivalNational Zoological ParkSmithsonian Conservation Biology InstituteFront RoyalVirginiaUSA
- Center for Species SurvivalNational Zoological ParkSmithsonian Conservation Biology InstituteWashingtonDistrict of ColumbiaUSA
- Smithsonian‐Mason School of ConservationFront RoyalVirginiaUSA
| | - Tomas Marques‐Bonet
- Institute of Evolutionary Biology, (UPF‐CSIC)PRBBBarcelonaSpain
- CNAG‐CRGCentre for Genomic Regulation (CRG)Barcelona Institute of Science and Technology (BIST)BarcelonaSpain
- Universitat Autònoma de Barcelona (UAB)Edifici ICTA‐ICPInstitut Català de Paleontologia Miquel CrusafontBarcelonaSpain
- Catalan Institution of Research and Advanced Studies (ICREA)BarcelonaSpain
| | - Eulalia Moreno
- Dept. Ecología Funcional y EvolutivaEstación Experimental de Zonas Áridas‐CSICAlmeríaSpain
| | - Esther Lizano
- Institute of Evolutionary Biology, (UPF‐CSIC)PRBBBarcelonaSpain
- Universitat Autònoma de Barcelona (UAB)Edifici ICTA‐ICPInstitut Català de Paleontologia Miquel CrusafontBarcelonaSpain
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7
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Brockett B, Banks S, Neaves LE, Gordon IJ, Pierson JC, Manning AD. Establishment, persistence and the importance of longitudinal monitoring in multi‐source reintroductions. Anim Conserv 2022. [DOI: 10.1111/acv.12764] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- B. Brockett
- Fenner School of Environment and Society The Australian National University Canberra ACT Australia
| | - S. Banks
- College of Engineering, IT and the Environment Charles Darwin University Darwin NT Australia
| | - L. E. Neaves
- Fenner School of Environment and Society The Australian National University Canberra ACT Australia
| | - I. J. Gordon
- Fenner School of Environment and Society The Australian National University Canberra ACT Australia
- James Hutton Institute Dundee UK
- Central Queensland University Townsville QLD Australia
- Land & Water CSIRO Townsville QLD Australia
- Protected Places Mission NERP2, Reef and Rainforest Research Center Cairns QLD Australia
| | - J. C. Pierson
- ACT Parks and Conservation Service Canberra Australia
| | - A. D. Manning
- Fenner School of Environment and Society The Australian National University Canberra ACT Australia
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8
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Undin M, Lockhart PJ, Hills SFK, Armstrong DP, Castro I. Mixed Mating in a Multi-Origin Population Suggests High Potential for Genetic Rescue in North Island Brown Kiwi, Apteryx mantelli. FRONTIERS IN CONSERVATION SCIENCE 2021. [DOI: 10.3389/fcosc.2021.702128] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Reinforcement translocations are increasingly utilised in conservation with the goal of achieving genetic rescue. However, concerns regarding undesirable results, such as genetic homogenisation or replacement, are widespread. One factor influencing translocation outcomes is the rate at which the resident and the introduced individuals interbreed. Consequently, post-release mate choice is a key behaviour to consider in conservation planning. Here we studied mating, and its consequences for genomic admixture, in the North Island brown kiwi Apteryx mantelli population on Ponui Island which was founded by two translocation events over 50 years ago. The two source populations used are now recognised as belonging to two separate management units between which birds differ in size and are genetically differentiated. We examined the correlation between male and female morphometrics for 17 known pairs and quantified the relatedness of 20 pairs from this admixed population. In addition, we compared the genetic similarity and makeup of 106 Ponui Island birds, including 23 known pairs, to birds representing the source populations for the original translocations. We found no evidence for size-assortative mating. On the contrary, genomic SNP data suggested that kiwi of one feather did not flock together, meaning that mate choice resulted in pairing between individuals that were less related than expected by random chance. Furthermore, the birds in the current Ponui Island population were found to fall along a gradient of genomic composition consistent with non-clustered representation of the two parental genomes. These findings indicate potential for successful genetic rescue in future Apteryx reinforcement translocations, a potential that is currently under utilised due to restrictive translocation policies. In light of our findings, we suggest that reconsideration of these policies could render great benefits for the future diversity of this iconic genus in New Zealand.
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9
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Forsdick NJ, Martini D, Brown L, Cross HB, Maloney RF, Steeves TE, Knapp M. Genomic sequencing confirms absence of introgression despite past hybridisation between a critically endangered bird and its common congener. Glob Ecol Conserv 2021. [DOI: 10.1016/j.gecco.2021.e01681] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023] Open
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10
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Lohr CA, Nilsson K, Sims C, Dunlop J, Lohr MT. Habitat selection by vulnerable golden bandicoots in the arid zone. Ecol Evol 2021; 11:10644-10658. [PMID: 34367603 PMCID: PMC8328459 DOI: 10.1002/ece3.7875] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2021] [Revised: 06/10/2021] [Accepted: 06/17/2021] [Indexed: 11/13/2022] Open
Abstract
In 2010, vulnerable golden bandicoots (Isoodon auratus) were translocated from Barrow Island, Western Australia, to a mainland predator-free enclosure on the Matuwa Indigenous Protected Area. Golden bandicoots were once widespread throughout a variety of arid and semiarid habitats of central and northern Australia. Like many small-to-medium-sized marsupials, the species has severely declined since colonization and has been reduced to only four remnant natural populations. Between 2010 and 2020, the reintroduced population of golden bandicoots on Matuwa was monitored via capture-mark-recapture data collection, which was used in spatially explicit capture-recapture analysis to monitor their abundance over time. In 2014, we used VHF transmitters to examine the home range and habitat selection of 20 golden bandicoots in the enclosure over a six-week period. We used compositional analysis to compare the use of four habitat types. Golden bandicoot abundance in the enclosure slowly increased between 2010 and 2014 and has since plateaued at approximately one quarter of the density observed in the founding population on Barrow Island. The population may have plateaued because some bandicoots escape through the fence. Golden bandicoots used habitats dominated by scattered shrubland with spinifex grass more than expected given the habitat's availability. Nocturnal foraging range was influenced by sex and trapping location, whereas diurnal refuge habitat, which was typically under a spinifex hummock with minimal overstory vegetation, was consistent across sex and trapping location. Our work suggests that diurnal refuge habitat may be an important factor for the success of proposed translocations of golden bandicoots.
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Affiliation(s)
- Cheryl A. Lohr
- Department of Biodiversity Conservation and AttractionsBiodiversity Conservation ScienceKensingtonWestern AustraliaAustralia
| | - Kristen Nilsson
- Department of Biodiversity Conservation and AttractionsBiodiversity Conservation ScienceKensingtonWestern AustraliaAustralia
| | - Colleen Sims
- Department of Biodiversity Conservation and AttractionsBiodiversity Conservation ScienceKensingtonWestern AustraliaAustralia
| | - Judy Dunlop
- Department of Biodiversity Conservation and AttractionsBiodiversity Conservation ScienceKensingtonWestern AustraliaAustralia
| | - Michael T. Lohr
- Phoenix Environmental SciencesOsborne ParkWestern AustraliaAustralia
- School of Science, Edith Cowan University, 100 Joondalup DriveJoondalupWA 6027Australia
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11
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Kelemen EP, Rehan SM. Conservation insights from wild bee genetic studies: Geographic differences, susceptibility to inbreeding, and signs of local adaptation. Evol Appl 2021; 14:1485-1496. [PMID: 34178099 PMCID: PMC8210791 DOI: 10.1111/eva.13221] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2020] [Revised: 02/19/2021] [Accepted: 03/07/2021] [Indexed: 12/12/2022] Open
Abstract
Conserving bees are critical both ecologically and economically. Genetic tools are valuable for monitoring these vital pollinators since tracking these small, fast-flying insects by traditional means is difficult. By surveying the current state of the literature, this review discusses how recent advances in landscape genetic and genomic research are elucidating how wild bees respond to anthropogenic threats. Current literature suggests that there may be geographic differences in the vulnerability of bee species to landscape changes. Populations of temperate bee species are becoming more isolated and more genetically depauperate as their landscape becomes more fragmented, but tropical bee species appear unaffected. These differences may be an artifact of historical differences in land-use, or it suggests that different management plans are needed for temperate and tropical bee species. Encouragingly, genetic studies on invasive bee species indicate that low levels of genetic diversity may not lead to rapid extinction in bees as once predicted. Additionally, next-generation sequencing has given researchers the power to identify potential genes under selection, which are likely critical to species' survival in their rapidly changing environment. While genetic studies provide insights into wild bee biology, more studies focusing on a greater phylogenetic and life-history breadth of species are needed. Therefore, caution should be taken when making broad conservation decisions based on the currently few species examined.
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12
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St. Clair AB, Dunwiddie PW, Fant JB, Kaye TN, Kramer AT. Mixing source populations increases genetic diversity of restored rare plant populations. Restor Ecol 2020. [DOI: 10.1111/rec.13131] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Affiliation(s)
- Adrienne Basey St. Clair
- Program in Plant Biology and ConservationNorthwestern University 2205 Tech Drive Evanston IL 60208 U.S.A
- Negaunee Institute for Plant Conservation Science and ActionNegaunee Institute for Plant Conservation Science and Action Botanic Garden 1000 Lake Cook Road Chicago IL 60022 U.S.A
| | | | - Jeremie B. Fant
- Negaunee Institute for Plant Conservation Science and ActionNegaunee Institute for Plant Conservation Science and Action Botanic Garden 1000 Lake Cook Road Chicago IL 60022 U.S.A
| | - Thomas N. Kaye
- Institute for Applied Ecology 563 SW Jefferson Avenue Corvallis OR 97333 U.S.A
- Department of Botany and Plant PathologyOregon State University Corvallis OR 97331 U.S.A
| | - Andrea T. Kramer
- Negaunee Institute for Plant Conservation Science and ActionNegaunee Institute for Plant Conservation Science and Action Botanic Garden 1000 Lake Cook Road Chicago IL 60022 U.S.A
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13
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Thavornkanlapachai R, Mills HR, Ottewell K, Dunlop J, Sims C, Morris K, Donaldson F, Kennington WJ. Mixing Genetically and Morphologically Distinct Populations in Translocations: Asymmetrical Introgression in A Newly Established Population of the Boodie ( Bettongia lesueur). Genes (Basel) 2019; 10:E729. [PMID: 31546973 PMCID: PMC6770996 DOI: 10.3390/genes10090729] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2019] [Revised: 09/10/2019] [Accepted: 09/17/2019] [Indexed: 11/22/2022] Open
Abstract
The use of multiple source populations provides a way to maximise genetic variation and reduce the impacts of inbreeding depression in newly established translocated populations. However, there is a risk that individuals from different source populations will not interbreed, leading to population structure and smaller effective population sizes than expected. Here, we investigate the genetic consequences of mixing two isolated, morphologically distinct island populations of boodies (Bettongia lesueur) in a translocation to mainland Australia over three generations. Using 18 microsatellite loci and the mitochondrial D-loop region, we monitored the released animals and their offspring between 2010 and 2013. Despite high levels of divergence between the two source populations (FST = 0.42 and ϕST = 0.72), there was clear evidence of interbreeding between animals from different populations. However, interbreeding was non-random, with a significant bias towards crosses between the genetically smaller-sized Barrow Island males and the larger-sized Dorre Island females. This pattern of introgression was opposite to the expectation that male-male competition or female mate choice would favour larger males. This study shows how mixing diverged populations can bolster genetic variation in newly established mammal populations, but the ultimate outcome can be difficult to predict, highlighting the need for continued genetic monitoring to assess the long-term impacts of admixture.
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Affiliation(s)
- Rujiporn Thavornkanlapachai
- School of Biological Sciences, The University of Western Australia, Crawley, Western Australia 6009, Australia.
| | - Harriet R Mills
- Centre for Ecosystem Management, School of Science, Edith Cowan University, Joondalup, Western Australia 6027, Australia.
| | - Kym Ottewell
- Department of Biodiversity, Conservation and Attractions, Locked Bag 104, Bentley Delivery Centre, Western Australia 6152, Australia.
| | - Judy Dunlop
- School of Veterinary and Biomedical Sciences, Murdoch University, Murdoch, Western Australia 6150, Australia.
- Department of Biodiversity, Conservation and Attractions, PO Box 51, Wanneroo, Western Australia 6946, Australia.
| | - Colleen Sims
- Department of Biodiversity, Conservation and Attractions, PO Box 51, Wanneroo, Western Australia 6946, Australia.
| | - Keith Morris
- Department of Biodiversity, Conservation and Attractions, PO Box 51, Wanneroo, Western Australia 6946, Australia.
| | - Felicity Donaldson
- 360 Environmental, 10 Bermondsey Street, West Leederville, Western Australia 6007, Australia.
| | - W Jason Kennington
- School of Biological Sciences, The University of Western Australia, Crawley, Western Australia 6009, Australia.
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