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Artykuły w czasopismach na temat „Population genetic connectivity”

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Data publikacji: 6 września 2023

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Putri, S. N. N., G. R. Maharani, M. Farhan, et al. "Population connectivity and genetic diversity population connectivity of Rabbitfish (Siganus canaliculatus) among Bangladesh, China and Indonesia." IOP Conference Series: Earth and Environmental Science 1033, no. 1 (2022): 012043. http://dx.doi.org/10.1088/1755-1315/1033/1/012043.

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Abstract Population genetics studies genetic variation involving gene and allele frequencies in spatial and temporal space. Genetic information can be used in conservation management through identification of phylogenetic tree reconstructions, genetic distance, genetic structure, and haplotype connectivity to maintain population existence. The samples used were primary genetic data of Siganus canaliculatus taken from Indonesian waters and secondary data accessed from the BOLD SYSTEM database from several locations, namely Indonesia, China, and Bangladesh. This research was conducted to determi

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Marandel, Florianne, Pascal Lorance, Marco Andrello, et al. "Insights from genetic and demographic connectivity for the management of rays and skates." Canadian Journal of Fisheries and Aquatic Sciences 75, no. 8 (2018): 1291–302. http://dx.doi.org/10.1139/cjfas-2017-0291.

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Studying demographic and genetic connectivity can help assess marine metapopulation structure. Rays and skates have no larval phase; hence, population connectivity can only result from active movement of individuals. Using thornback ray (Raja clavata) in European waters as a case study, demographic and genetic connectivity were studied for 11 putative populations with unequal population abundances and two hypotheses of dispersal rates. Genetic simulation results highlighted three large metapopulations: in the Mediterranean, around the Azores, and on the Northeast Atlantic shelf. Demographic re

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Jangjoo, Maryam, Stephen F. Matter, Jens Roland, and Nusha Keyghobadi. "Connectivity rescues genetic diversity after a demographic bottleneck in a butterfly population network." Proceedings of the National Academy of Sciences 113, no. 39 (2016): 10914–19. http://dx.doi.org/10.1073/pnas.1600865113.

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Demographic bottlenecks that occur when populations fluctuate in size erode genetic diversity, but that diversity can be recovered through immigration. Connectivity among populations and habitat patches in the landscape enhances immigration and should in turn facilitate recovery of genetic diversity after a sudden reduction in population size. For the conservation of genetic diversity, it may therefore be particularly important to maintain connectivity in the face of factors that increase demographic instability, such as climate change. However, a direct link between connectivity and recovery

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Caplins, Serena A., Kimberly J. Gilbert, Claudia Ciotir, Jens Roland, Stephen F. Matter, and Nusha Keyghobadi. "Landscape structure and the genetic effects of a population collapse." Proceedings of the Royal Society B: Biological Sciences 281, no. 1796 (2014): 20141798. http://dx.doi.org/10.1098/rspb.2014.1798.

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Both landscape structure and population size fluctuations influence population genetics. While independent effects of these factors on genetic patterns and processes are well studied, a key challenge is to understand their interaction, as populations are simultaneously exposed to habitat fragmentation and climatic changes that increase variability in population size. In a population network of an alpine butterfly, abundance declined 60–100% in 2003 because of low over-winter survival. Across the network, mean microsatellite genetic diversity did not change. However, patch connectivity and loca

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Padrón, Mariana, and Katell Guizien. "Modelling the effect of demographic traits and connectivity on the genetic structuration of marine metapopulations of sedentary benthic invertebrates." ICES Journal of Marine Science 73, no. 7 (2015): 1935–45. http://dx.doi.org/10.1093/icesjms/fsv158.

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Abstract Accounting for connectivity is essential in marine spatial planning and the proper design and management of marine protected areas, given that their effectiveness depends on the patterns of dispersal and colonization between protected and non-protected areas. The genetic structure of populations is commonly used to infer connectivity among distant populations. Here, we explore how population genetic structure is affected by pre- and settlement limitations with a spatially explicit coupled metapopulation-gene flow model that simulates the effect of demographic fluctuations on the allel

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Weckworth, Byron V., Marco Musiani, Nicholas J. DeCesare, Allan D. McDevitt, Mark Hebblewhite, and Stefano Mariani. "Preferred habitat and effective population size drive landscape genetic patterns in an endangered species." Proceedings of the Royal Society B: Biological Sciences 280, no. 1769 (2013): 20131756. http://dx.doi.org/10.1098/rspb.2013.1756.

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Landscape genetics provides a framework for pinpointing environmental features that determine the important exchange of migrants among populations. These studies usually test the significance of environmental variables on gene flow, yet ignore one fundamental driver of genetic variation in small populations, effective population size, N e . We combined both approaches in evaluating genetic connectivity of a threatened ungulate, woodland caribou. We used least-cost paths to calculate matrices of resistance distance for landscape variables (preferred habitat, anthropogenic features and predation

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Campos, João Carlos, Asghar Mobaraki, Elham Abtin, Raquel Godinho, and José Carlos Brito. "Preliminary assessment of genetic diversity and population connectivity of the Mugger Crocodile in Iran." Amphibia-Reptilia 39, no. 1 (2018): 126–31. http://dx.doi.org/10.1163/15685381-16000173.

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The Mugger Crocodile (Crocodylus palustris) is a threatened reptile inhabiting the Indian Sub-continent and Western Asia. Despite its “Vulnerable” conservation status, data about population genetic structure and connectivity are unavailable. This study makes a preliminary assessment of the genetic diversity, population structure and habitat connectivity ofC. palustrisin Iran. Ten tissue samples collected along the Sarbaz-Bahukalat basins were analysed and a set of 12 microsatellites was genotyped. Genetic diversity indices were estimated and population substructuring was assessed through Bayes

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Eschenroeder, Jackman C., and James H. Roberts. "Habitat loss, fragmentation, and the genetic status of Roanoke bass." Canadian Journal of Fisheries and Aquatic Sciences 77, no. 2 (2020): 375–87. http://dx.doi.org/10.1139/cjfas-2019-0103.

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Roanoke bass (Ambloplites cavifrons) persist in five river basins in the eastern US, where they are threatened by invasive species, habitat loss and degradation, and hydrologic fragmentation. We conducted the first conservation genetic study of A. cavifrons, analyzing variation at 19 nuclear microsatellite DNA loci and the cytochrome b mitochondrial DNA gene to estimate population structure and demography, genetic relationships among populations, and the role of landscape features in regulating genetic diversity and differentiation. Most streams harbored genetically distinguishable populations

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Douglas, Marlis R., Steven M. Mussmann, Tyler K. Chafin, et al. "Population connectivity in voles (Microtus sp.) as a gauge for tall grass prairie restoration in midwestern North America." PLOS ONE 16, no. 12 (2021): e0260344. http://dx.doi.org/10.1371/journal.pone.0260344.

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Ecological restoration can promote biodiversity conservation in anthropogenically fragmented habitats, but effectiveness of these management efforts need to be statistically validated to determine ’success.’ One such approach is to gauge the extent of recolonization as a measure of landscape permeability and, in turn, population connectivity. In this context, we estimated dispersal and population connectivity in prairie vole (Microtus ochrogaster; N = 231) and meadow vole (M. pennsylvanicus; N = 83) within five tall-grass prairie restoration sites embedded within the agricultural matrix of mid

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Stafford-Bell, R. E., W. F. D. van Dongen, R. W. Robinson, and A. A. Chariton. "Connectivity of the seagrass Zostera muelleri within south-eastern Australia." Marine and Freshwater Research 70, no. 8 (2019): 1056. http://dx.doi.org/10.1071/mf18333.

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Contemporary oceanic conditions and local dispersal of propagules influence the genetic diversity and connectivity among seagrass populations. The degree of connectivity between populations of Zostera muelleri in south-eastern Australia is unknown. In this study we examined genetic connectivity among 25 sites containing Z. muelleri using nine polymorphic microsatellite DNA loci. We hypothesised minimal sharing of genetic material between distant populations and a degree of connectivity between local populations. Genotypic diversity was high, with 64% of populations having unique multilocus gen

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Ross, Steven, Jean-Marc Costanzi, Mansoor Al Jahdhami, Haitham Al Rawahi, Muhammad Ghazali, and Helen Senn. "First evaluation of the population structure, genetic diversity and landscape connectivity of the Endangered Arabian tahr." Mammalian Biology 100, no. 6 (2020): 659–73. http://dx.doi.org/10.1007/s42991-020-00072-4.

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AbstractThe Arabian tahr (Arabitragus jayakari) occurs only in the mountains of northern Oman and the United Arab Emirates. The species is classified as Endangered due to its small declining population. In this study, we combined genetic and landscape ecology techniques in order to inform landscape scale conservation and genetic management of Arabian tahr. Using 540 base pairs of mitochondrial control region in a dataset of 53 samples, we found eight haplotypes, which fell into two haplogroups. Population genetic analysis using a panel of 14 microsatellite loci also showed a weak, but signific

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Schulwitz, Sarah, Jeff Johnson, and Bryan Bedrosian. "Low Neutral Genetic Diversity in an Isolated Greater Sage Grouse (Centrocercus Urophasianus) Population in Northwest Wyoming." UW National Parks Service Research Station Annual Reports 35 (January 1, 2012): 119–33. http://dx.doi.org/10.13001/uwnpsrc.2012.3943.

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Habitat loss is well recognized as an immediate threat to biodiversity. Depending on the dispersal capabilities of the species, increased habitat fragmentation often results in reduced functional connectivity and gene flow followed by population decline and a higher likelihood of eventual extinction. Knowledge of the degree of connectivity between populations is therefore crucial for better management of small populations in a changing landscape. A small population of greater sage-grouse (Centrocercus urophasianus) exists in northwest Wyoming within the Jackson Hole valley, including Grand Tet

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Hansen, Heidi, Steven C. Hess, David Cole, and Paul C. Banko. "Using population genetic tools to develop a control strategy for feral cats (Felis catus) in Hawai'i." Wildlife Research 34, no. 8 (2007): 587. http://dx.doi.org/10.1071/wr07043.

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Population genetics can provide information about the demographics and dynamics of invasive species that is beneficial for developing effective control strategies. We studied the population genetics of feral cats on Hawai‘i Island by microsatellite analysis to evaluate genetic diversity and population structure, assess gene flow and connectivity among three populations, identify potential source populations, characterise population dynamics, and evaluate sex-biased dispersal. High genetic diversity, low structure, and high number of migrants per generation supported high gene flow that was not

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Kingsford, Michael J., Jodie A. Schlaefer, and Scott J. Morrissey. "Population Structures and Levels of Connectivity for Scyphozoan and Cubozoan Jellyfish." Diversity 13, no. 4 (2021): 174. http://dx.doi.org/10.3390/d13040174.

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Understanding the hierarchy of populations from the scale of metapopulations to mesopopulations and member local populations is fundamental to understanding the population dynamics of any species. Jellyfish by definition are planktonic and it would be assumed that connectivity would be high among local populations, and that populations would minimally vary in both ecological and genetic clade-level differences over broad spatial scales (i.e., hundreds to thousands of km). Although data exists on the connectivity of scyphozoan jellyfish, there are few data on cubozoans. Cubozoans are capable sw

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Drake, Christine C., Micheline Manseau, Cornelya F. C. Klütsch, et al. "Does connectivity exist for remnant boreal caribou (Rangifer tarandus caribou) along the Lake Superior Coastal Range? Options for landscape restoration." Rangifer 38, no. 1 (2018): 13–26. http://dx.doi.org/10.7557/2.38.1.4124.

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Genetic analysis can provide important information on the dynamic and spatial structure of groups of animals or populations. Little is known of the genetic population structure of caribou that inhabit the Lake Superior Coastal Range (LSCR) and the level of gene flow between individuals within the range and beyond. From a landscape perspective, this range is spatially isolated and genetic connectivity within the range is presumed limited due to large water crossings on Lake Superior. This study aims to answer if animal movement can be discerned, using genetic population and relatedness analyses

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Digiantonio, Gina, Linda Blum, Karen McGlathery, Kor-jent van Dijk, and Michelle Waycott. "Genetic mosaicism and population connectivity of edge-of-range Halodule wrightii populations." Aquatic Botany 161 (February 2020): 103161. http://dx.doi.org/10.1016/j.aquabot.2019.103161.

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Liao, Te-Yu, Pei-Luen Lu, Yuan-Huan Yu, et al. "Amphidromous but endemic: Population connectivity of Rhinogobius gigas (Teleostei: Gobioidei)." PLOS ONE 16, no. 2 (2021): e0246406. http://dx.doi.org/10.1371/journal.pone.0246406.

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Rhinogobius gigas is an amphidromous fish endemic to eastern Taiwan. Fishes with the diadromous behavior are expected to have a broader distribution range and higher genetic homogeneity despite that some amphidromous fishes with limited distribution are observed and R. gigas is an additional exception with a limited distribution range. Rhinogobius gigas has been documented to be retained inshore near the river plume with a short pelagic larval duration of 30–40 days, which may account for the endemism of this species. The short marine larval stage of R. gigas may imply a population genetic str

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Veale, A. J., D. M. Gleeson, and M. N. Clout. "Measuring connectivity of invasive stoat populations to inform conservation management." Wildlife Research 41, no. 5 (2014): 395. http://dx.doi.org/10.1071/wr14015.

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Context Effective design of conservation management programs for long-term population control requires an accurate definition of the spatial extent of populations, along with a proper understanding of the ways that landscape patchiness influences demography and dispersal within these populations. Aims In the present study, genetic techniques are used to describe the population genetic structure and connectivity of invasive stoats (Mustela erminea) across the Auckland region, New Zealand, so as to assist planning for mainland stoat control, and define potential future eradication units. Methods

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Krawiec, Josef, Siegfried L. Krauss, Robert A. Davis, and Peter B. S. Spencer. "Weak genetic structuring suggests historically high genetic connectivity among recently fragmented urban populations of the scincid lizard, Ctenotus fallens." Australian Journal of Zoology 63, no. 4 (2015): 279. http://dx.doi.org/10.1071/zo15022.

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Populations in fragmented urban remnants may be at risk of genetic erosion as a result of reduced gene flow and elevated levels of inbreeding. This may have serious genetic implications for the long-term viability of remnant populations, in addition to the more immediate pressures caused by urbanisation. The population genetic structure of the generalist skink Ctenotus fallens was examined using nine microsatellite markers within and among natural vegetation remnants within a highly fragmented urban matrix in the Perth metropolitan area in Western Australia. These data were compared with sampl

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Christie, Mark R., Patrick G. Meirmans, Oscar E. Gaggiotti, Robert J. Toonen, and Crow White. "Disentangling the relative merits and disadvantages of parentage analysis and assignment tests for inferring population connectivity." ICES Journal of Marine Science 74, no. 6 (2017): 1749–62. http://dx.doi.org/10.1093/icesjms/fsx044.

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AbstractAccurately estimating patterns of population connectivity in marine systems remains an elusive goal. Current genetic approaches have focused on assigning individuals back to their natal populations using one of two methods: parentage analyses and assignment tests. Each of these approaches has their relative merits and weaknesses. Here, we illustrate these tradeoffs using a forward-time agent-based model that incorporates relevant natural history and physical oceanography for 135 Kellet’s whelk (Kelletia kelletii) populations from Southern California. Like most marine organisms, Kellet’

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Serrano-Rodríguez, Anay, Griselda Escalona-Segura, Antonio González Rodríguez, et al. "Effects of Anthropogenic Habitat Fragmentation on the Genetic Connectivity of the Threatened and Endemic Campylorhynchus yucatanicus (Aves, Trogloditydae) in the Yucatan Peninsula, Mexico." Diversity 14, no. 12 (2022): 1108. http://dx.doi.org/10.3390/d14121108.

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Identifying connectivity patterns among remnant bird populations and their relationships with land use practices and adjacent habitat fragments is key to implementing appropriate long-term management strategies for species conservation. The coastal scrub and dune vegetation complex of the northern Yucatan Peninsula is rich in endemisms and has been affected by human development, which threatens the survival of the Yucatan Wren (Campylorhynchus yucatanicus) population, an endemic bird species. To identify possible anthropogenic barriers to the connectivity of C. yucatanicus along 14 localities

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Gauthier, Martha, Emily Crowe, Lindsey Hawke, Neil Emery, Paul Wilson, and Joanna Freeland. "Conservation genetics of Pitcher’s thistle (Cirsium pitcheri), an endangered Great Lakes endemic." Botany 88, no. 3 (2010): 250–57. http://dx.doi.org/10.1139/b10-006.

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Pitcher's thistle ( Cirsium pitcheri Torr. ex Eaton (Torr. & Gray)) is a Great Lakes endemic that in Canada is designated as threatened at both the provincial (Ontario) and national levels. Management plans will benefit from conservation genetic data, which can provide insight into population genetic diversity and differentiation. We obtained genetic data from nuclear and chloroplast microsatellite markers from 17 populations of C. pitcheri around the Great Lakes. The nuclear data revealed overall low levels of diversity, high levels of inbreeding, and low levels of population connectivity

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Ramírez, Oscar, Elena Gómez-Díaz, Iñigo Olalde, et al. "Population connectivity buffers genetic diversity loss in a seabird." Frontiers in Zoology 10, no. 1 (2013): 28. http://dx.doi.org/10.1186/1742-9994-10-28.

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Chapuis, Marie-Pierre, Julie-Anne M. Popple, Karine Berthier, et al. "Challenges to assessing connectivity between massive populations of the Australian plague locust." Proceedings of the Royal Society B: Biological Sciences 278, no. 1721 (2011): 3152–60. http://dx.doi.org/10.1098/rspb.2010.2605.

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Linking demographic and genetic dispersal measures is of fundamental importance for movement ecology and evolution. However, such integration can be difficult, particularly for highly fecund species that are often the target of management decisions guided by an understanding of population movement. Here, we present an example of how the influence of large population sizes can preclude genetic approaches from assessing demographic population structuring, even at a continental scale. The Australian plague locust, Chortoicetes terminifera , is a significant pest, with populations on the eastern a

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Jaun, Andreas, Hans-Peter Wymann, and Kay Lucek. "Lack of genetic structure suggests high connectivity of Parnassius phoebus between nearby valleys in the Alps." Alpine Entomology 6 (March 24, 2022): 1–6. http://dx.doi.org/10.3897/alpento.6.80405.

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The spatial scale of intraspecific genetic connectivity and population structure are important aspects of conservation genetics. However, for many species these properties are unknown. Here we used genomic data to assess the genetic structure of the small Apollo butterfly (Parnassius phoebus Fabricius, 1793; Lepidoptera: Papilionidae) across three nearby valleys in the Central Swiss Alps. One of the valleys is currently used for hydropower production with future plans to raise the existing dam wall further. We found no significant genetic structure, suggesting a currently high connectivity of

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LaCava, Melanie E. F., Roderick B. Gagne, Sierra M. Love Stowell, et al. "Pronghorn population genomics show connectivity in the core of their range." Journal of Mammalogy 101, no. 4 (2020): 1061–71. http://dx.doi.org/10.1093/jmammal/gyaa054.

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Abstract Preserving connectivity in the core of a species’ range is crucial for long-term persistence. However, a combination of ecological characteristics, social behavior, and landscape features can reduce connectivity among wildlife populations and lead to genetic structure. Pronghorn (Antilocapra americana), for example, exhibit fluctuating herd dynamics and variable seasonal migration strategies, but GPS tracking studies show that landscape features such as highways impede their movements, leading to conflicting hypotheses about expected levels of genetic structure. Given that pronghorn p

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Rodger, Yael S., Alexandra Pavlova, Steve Sinclair, Melinda Pickup, and Paul Sunnucks. "Evolutionary history and genetic connectivity across highly fragmented populations of an endangered daisy." Heredity 126, no. 5 (2021): 846–58. http://dx.doi.org/10.1038/s41437-021-00413-0.

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AbstractConservation management can be aided by knowledge of genetic diversity and evolutionary history, so that ecological and evolutionary processes can be preserved. The Button Wrinklewort daisy (Rutidosis leptorrhynchoides) was a common component of grassy ecosystems in south-eastern Australia. It is now endangered due to extensive habitat loss and the impacts of livestock grazing, and is currently restricted to a few small populations in two regions >500 km apart, one in Victoria, the other in the Australian Capital Territory and nearby New South Wales (ACT/NSW). Using a genome-wide SN

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Gerlach, Gabriele, Philipp Kraemer, Peggy Weist, Laura Eickelmann, and Michael J. Kingsford. "Impact of cyclones on hard coral and metapopulation structure, connectivity and genetic diversity of coral reef fish." Coral Reefs 40, no. 4 (2021): 999–1011. http://dx.doi.org/10.1007/s00338-021-02096-9.

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AbstractCyclones have one of the greatest effects on the biodiversity of coral reefs and the associated species. But it is unknown how stochastic alterations in habitat structure influence metapopulation structure, connectivity and genetic diversity. From 1993 to 2018, the reefs of the Capricorn Bunker Reef group in the southern part of the Great Barrier Reef were impacted by three tropical cyclones including cyclone Hamish (2009, category 5). This resulted in substantial loss of live habitat-forming coral and coral reef fish communities. Within 6–8 years after cyclones had devastated, live ha

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Tang, Lei Stanley, Carolyn Smith-Keune, Anthony C. Grice, James M. Moloney, and Britta Denise Hardesty. "Genetic structure and diversity of the black-throated finch (Poephila cincta) across its current range." Australian Journal of Zoology 64, no. 6 (2016): 375. http://dx.doi.org/10.1071/zo16073.

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Understanding the patterns of population connectivity and level of genetic diversity can facilitate the identification of both ecologically relevant populations and the spatial scales at which conservation management may need to focus. We quantified genetic variation within and among populations of black-throated finches across their current distribution. To quantify genetic structure and diversity, we genotyped 242 individuals from four populations using 14 polymorphic microsatellite markers and sequenced 25 individuals based on a 302-base-pair segment of mitochondrial control region. We foun

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Ovenden, Jennifer R. "Crinkles in connectivity: combining genetics and other types of biological data to estimate movement and interbreeding between populations." Marine and Freshwater Research 64, no. 3 (2013): 201. http://dx.doi.org/10.1071/mf12314.

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Marine species generally have large population sizes, continuous distributions and high dispersal capacity. Despite this, they are often subdivided into separate populations, which are the basic units of fisheries management. For example, populations of some fisheries species across the deep water of the Timor Trench are genetically different, inferring minimal movement and interbreeding. When connectivity is higher than the Timor Trench example, but not so high that the populations become one, connectivity between populations is crinkled. Crinkled connectivity occurs when migration is above t

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Skroblin, Anja, Andrew Cockburn, and Sarah Legge. "The population genetics of the western purple-crowned fairy-wren (Malurus coronatus coronatus), a declining riparian passerine." Australian Journal of Zoology 62, no. 3 (2014): 251. http://dx.doi.org/10.1071/zo13087.

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We investigate the population genetic structure of the declining western subspecies of the purple-crowned fairy-wren (Malurus coronatus coronatus) in order to guide conservation management recommendations for this riparian habitat specialist. Our analysis of multilocus microsatellite data, from 79 individuals sampled from across the species’ range, indicates that M. c. coronatus occurs as genetically differentiated subpopulations that correspond to catchment boundaries or expansive gaps in habitat along waterways. The genetic similarity of large populations of fairy-wrens on four catchments (F

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Smith, Timothy M., Corey P. Green, and Craig D. H. Sherman. "Patterns of connectivity and population structure of the southern calamary Sepioteuthis australis in southern Australia." Marine and Freshwater Research 66, no. 10 (2015): 942. http://dx.doi.org/10.1071/mf14328.

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The southern calamary, Sepioteuthis australis, is a commercially and recreationally important inshore cephalopod endemic to southern Australia and New Zealand. Typical of other cephalopods, S. australis has a short life span, form nearshore spawning aggregations and undergo direct development. Such life history traits may restrict connectivity between spawning grounds creating highly structured and genetically differentiated populations that are susceptible to population crashes. Here we use seven polymorphic microsatellite markers to assess connectivity and population structure of S. australi

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Silva, C. N. S., H. S. Macdonald, M. G. Hadfield, M. Cryer, and J. P. A. Gardner. "Ocean currents predict fine-scale genetic structure and source-sink dynamics in a marine invertebrate coastal fishery." ICES Journal of Marine Science 76, no. 4 (2019): 1007–18. http://dx.doi.org/10.1093/icesjms/fsy201.

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Abstract Estimates of connectivity are vital for understanding population dynamics and for the design of spatial management areas. However, this is still a major challenge in the marine environment because the relative contributions of factors influencing connectivity amongst subpopulations are difficult to assess. This study combined population genetics with hydrodynamic modelling (Regional Ocean Modeling System, ROMS) to assess spatial and temporal exchange of individuals among subpopulations of the New Zealand scallop, Pecten novaezelandiae, within the Coromandel fishery area open to commer

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Salas, E. M., G. Bernardi, M. L. Berumen, M. R. Gaither, and L. A. Rocha. "RADseq analyses reveal concordant Indian Ocean biogeographic and phylogeographic boundaries in the reef fish Dascyllus trimaculatus." Royal Society Open Science 6, no. 5 (2019): 172413. http://dx.doi.org/10.1098/rsos.172413.

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Population genetic analysis is an important tool for estimating the degree of evolutionary connectivity in marine organisms. Here, we investigate the population structure of the three-spot damselfish Dascyllus trimaculatus in the Red Sea, Arabian Sea and Western Indian Ocean, using 1174 single nucleotide polymorphisms (SNPs). Neutral loci revealed a signature of weak genetic differentiation between the Northwestern (Red Sea and Arabian Sea) and Western Indian Ocean biogeographic provinces. Loci potentially under selection (outlier loci) revealed a similar pattern but with a much stronger signa

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Anthonysamy, Whitney J. B., Michael J. Dreslik, Sarah J. Baker, et al. "Limited gene flow and pronounced population genetic structure of Eastern Massasauga (Sistrurus catenatus) in a Midwestern prairie remnant." PLOS ONE 17, no. 3 (2022): e0265666. http://dx.doi.org/10.1371/journal.pone.0265666.

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As anthropogenic changes continue to ecologically stress wildlife, obtaining measures of gene flow and genetic diversity are crucial for evaluating population trends and considering management and conservation strategies for small, imperiled populations. In our study, we conducted a molecular assessment to expand on previous work to elucidate patterns of diversity and connectivity in the remaining disjunct Eastern Massasauga Rattlesnake (Sistrurus catenatus) hibernacula in Illinois. We assayed genetic data for 327 samples collected during 1999–2015 from the Carlyle Lake study area across 21 mi

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Chaiyes, Aingorn, Nattakan Ariyaraphong, Ngamphrom Sukgosa, et al. "Evidence of Genetic Connectivity among Lyle’s Flying Fox Populations in Thailand for Wildlife Management and One Health Framework." Sustainability 14, no. 17 (2022): 10791. http://dx.doi.org/10.3390/su141710791.

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Bats are important reservoir hosts of emerging viruses. Recent viral outbreaks and pandemics have resulted in an increased research focus on the genetic diversity, population structure, and distribution of bat species. Lyle’s flying fox (Pteropus lylei) is widely distributed throughout central Thailand, with most colonies congregating in temples within proximity to humans. A lack of knowledge regarding the genetic connectivity among different colonies hinders the investigation of zoonotic disease epidemiology and wildlife management. In this study, we hypothesized that genetic material may be

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Skroblin, Anja, Robert Lanfear, Andrew Cockburn, and Sarah Legge. "Inferring population connectivity across the range of the purple-crowned fairy-wren (Malurus coronatus) from mitochondrial DNA and morphology: implications for conservation management." Australian Journal of Zoology 60, no. 3 (2012): 199. http://dx.doi.org/10.1071/zo12093.

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Knowledge of population structure and patterns of connectivity is required to implement effective conservation measures for the purple-crowned fairy-wren (Malurus coronatus), a threatened endemic of northern Australia. This study aimed to identify barriers to dispersal across the distribution of M. coronatus, investigate the impact that the recent declines may have on population connectivity, and propose conservation actions to maintain natural patterns of gene flow. Analysis of mitochondrial DNA sequences from 87 M. coronatus identified two phylogenetic clusters that corresponded with the phe

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Tay, Y. C., M. W. P. Chng, W. W. G. Sew, F. E. Rheindt, K. P. P. Tun, and R. Meier. "Beyond the Coral Triangle: high genetic diversity and near panmixia in Singapore's populations of the broadcast spawning sea star Protoreaster nodosus." Royal Society Open Science 3, no. 8 (2016): 160253. http://dx.doi.org/10.1098/rsos.160253.

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The Coral Triangle is widely considered the most important centre of marine biodiversity in Asia while areas on its periphery such as the South China Sea, have received much less interest. Here, we demonstrate that a small population of the knobbly sea star Protoreaster nodosus in Singapore has similarly high levels of genetic diversity as comparable Indonesian populations from the Coral Triangle. The high genetic diversity of this population is remarkable because it is maintained despite decades of continued anthropogenic disturbance. We postulate that it is probably due to broadcast spawning

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Liu, Shang Yin Vanson, Shoou Jeng Joung, Chi-Ju Yu, Hua-Hsun Hsu, Wen-Pei Tsai, and Kwang Ming Liu. "Genetic diversity and connectivity of the megamouth shark (Megachasma pelagios)." PeerJ 6 (March 5, 2018): e4432. http://dx.doi.org/10.7717/peerj.4432.

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The megamouth shark (Megachasma pelagios) was described as a new species in 1983. Since then, only ca. 100 individuals have been observed or caught. Its horizontal migration, dispersal, and connectivity patterns are still unknown due to its rarity. Two genetic markers were used in this study to reveal its genetic diversity and connectivity pattern. This approach provides a proxy to indirectly measure gene flow between populations. Tissues from 27 megamouth sharks caught by drift nets off the Hualien coast (eastern Taiwan) were collected from 2013 to 2015. With two additional tissue samples fro

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Baltazar-Soares, Miguel, Hans-Harald Hinrichsen, and Christophe Eizaguirre. "Integrating population genomics and biophysical models towards evolutionary-based fisheries management." ICES Journal of Marine Science 75, no. 4 (2018): 1245–57. http://dx.doi.org/10.1093/icesjms/fsx244.

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Abstract Overfishing and rapid environmental shifts pose severe challenges to the resilience and viability of marine fish populations. To develop and implement measures that enhance species’ adaptive potential to cope with those pressures while, at the same time, ensuring sustainable exploitation rates is part of the central goal of fisheries management. Here, we argue that a combination of biophysical modelling and population genomic assessments offer ideal management tools to define stocks, their physical connectivity and ultimately, their short-term adaptive potential. To date, biophysical

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Casabianca, Silvia, Antonella Penna, Elena Pecchioli, Antoni Jordi, Gotzon Basterretxea, and Cristiano Vernesi. "Population genetic structure and connectivity of the harmful dinoflagellate Alexandrium minutum in the Mediterranean Sea." Proceedings of the Royal Society B: Biological Sciences 279, no. 1726 (2011): 129–38. http://dx.doi.org/10.1098/rspb.2011.0708.

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The toxin-producing microbial species Alexandrium minutum has a wide distribution in the Mediterranean Sea and causes high biomass blooms with consequences on the environment, human health and coastal-related economic activities. Comprehension of algal genetic differences and associated connectivity is fundamental to understand the geographical scale of adaptation and dispersal pathways of harmful microalgal species. In the present study, we combine A. minutum population genetic analyses based on microsatellites with indirect connectivity ( C i ) estimations derived from a general circulation

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Jenkins, Deborah A., Nicolas Lecomte, James A. Schaefer, et al. "Loss of connectivity among island-dwelling Peary caribou following sea ice decline." Biology Letters 12, no. 9 (2016): 20160235. http://dx.doi.org/10.1098/rsbl.2016.0235.

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Global warming threatens to reduce population connectivity for terrestrial wildlife through significant and rapid changes to sea ice. Using genetic fingerprinting, we contrasted extant connectivity in island-dwelling Peary caribou in northern Canada with continental-migratory caribou. We next examined if sea-ice contractions in the last decades modulated population connectivity and explored the possible impact of future climate change on long-term connectivity among island caribou. We found a strong correlation between genetic and geodesic distances for both continental and Peary caribou, even

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Liu, Shang-Yin Vanson, Chia-Hui Wang, Jen-Chieh Shiao, and Chang-Feng Dai. "Population connectivity of neon damsel, Pomacentrus coelestis, inferred from otolith microchemistry and mtDNA." Marine and Freshwater Research 61, no. 12 (2010): 1416. http://dx.doi.org/10.1071/mf10079.

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Understanding dispersal patterns and population connectivity is crucial to the conservation and management of fish assemblages in reef ecosystems. To reveal the population connectivity of reef fishes in the northern West Pacific, we examined the otolith chemistry and the mtDNA control region of Pomacentrus coelestis collected from six localities between Hainan Island (China) and Okinawa (Japan). The results of otolith chemistry analyses on pre-settlement signatures showed that fishes in north-west Taiwan may have a similar origin, whereas those in southern Taiwan might have a separate origin f

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Dodge, DL, MS Studivan, RJ Eckert, E. Chei, J. Beal, and JD Voss. "Population structure of the scleractinian coral Montastraea cavernosa in southeast Florida." Bulletin of Marine Science 96, no. 4 (2020): 767–82. http://dx.doi.org/10.5343/bms.2019.0074.

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The persistence of scleractinian coral populations on the Florida Reef Tract (FRT) is controlled in part by metapopulation dynamics and larval dispersal. Nine polymorphic microsatellite loci were analyzed to characterize contemporary population structure and gene flow as well as historical migration rates of Montastraea cavernosa at five sites off Martin, Palm Beach, and Broward counties in southeast Florida. The sampled populations demonstrated evidence of genetic isolation by distance over a geographic range of 85 km. Population genetic structure was divided into two genetic clusters, northe

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Ovenden, Jennifer R., Bree J. Tillett, Michael Macbeth, et al. "Stirred but not shaken: population and recruitment genetics of the scallop (Pecten fumatus) in Bass Strait, Australia." ICES Journal of Marine Science 73, no. 9 (2016): 2333–41. http://dx.doi.org/10.1093/icesjms/fsw068.

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Abstract We report population genetic structure and fine-scale recruitment processes for the scallop beds (Pecten fumatus) in Bass Strait and the eastern coastline of Tasmania in southern Australia. Conventional population pairwise FST analyses are compared with novel discriminant analysis of principal components (DAPC) to assess population genetic structure using allelic variation in 11 microsatellite loci. Fine-scale population connectivity was compared with oceanic features of the sampled area. Disjunct scallop beds were genetically distinct, but there was little population genetic structur

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López, Benjamín, Omar Mejía, and Gerardo Zúñiga. "The effect of landscape on functional connectivity and shell shape in the land snail Humboldtiana durangoensis." PeerJ 8 (May 20, 2020): e9177. http://dx.doi.org/10.7717/peerj.9177.

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The populations of Humboldtiana durangoensis have experienced a drastic reduction in the effective population size; in addition, the species is threatened by anthropogenic activities. For the aforementioned, landscape genetics will serve as a tool to define the potential evolutionarily significant units (ESU) for this species. To complete our objective, we evaluated the effect of cover vegetation and climate on the functional connectivity of the species from the last glacial maximum (LGM) to the present as well as the effect of climate on shell shape. Partial Mantel tests, distance-based redun

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Shaddick, Kim, Dean M. Gilligan, Christopher P. Burridge, Dean R. Jerry, Kiet Truong, and Luciano B. Beheregaray. "Historic divergence with contemporary connectivity in a catadromous fish, the estuary perch (Macquaria colonorum)." Canadian Journal of Fisheries and Aquatic Sciences 68, no. 2 (2011): 304–18. http://dx.doi.org/10.1139/f10-139.

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The estuary perch ( Macquaria colonorum ) represents an important model for assessing how historical changes in coastal geomorphology and current oceanographic and estuarine conditions may have impacted connectivity in a catadromous fish. A fragment of the mitochondrial control region and six microsatellite DNA markers were used to clarify connectivity in 17 populations (n = 354) of estuary perch from the southeast and southern coasts of Australia. The mtDNA data showed a latitudinal disjunction in haplotype frequencies that divided populations into two groups (ΦST = 0.419), in a pattern sugge

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Ishiyama, N., M. Sueyoshi, and F. Nakamura. "To what extent do human-altered landscapes retain population connectivity? Historical changes in gene flow of wetland fish Pungitius pungitius." Royal Society Open Science 2, no. 7 (2015): 150033. http://dx.doi.org/10.1098/rsos.150033.

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Understanding how human-altered landscapes affect population connectivity is valuable for conservation planning. Natural connectivity among wetlands, which is maintained by floods, is disappearing owing to farmland expansion. Using genetic data, we assessed historical changes in the population connectivity of the ninespine stickleback within a human-altered wetland system. We predicted that: (i) the contemporary gene flow maintained by the artificial watercourse network may be restricted to a smaller spatial scale compared with the gene flow preceding alteration, and (ii) the contemporary gene

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Spies, Ingrid, Lorenz Hauser, Per Erik Jorde, et al. "Inferring genetic connectivity in real populations, exemplified by coastal and oceanic Atlantic cod." Proceedings of the National Academy of Sciences 115, no. 19 (2018): 4945–50. http://dx.doi.org/10.1073/pnas.1800096115.

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Genetic data are commonly used to estimate connectivity between putative populations, but translating them to demographic dispersal rates is complicated. Theoretical equations that infer a migration rate based on the genetic estimator FST, such as Wright’s equation, FST ≈ 1/(4Nem + 1), make assumptions that do not apply to most real populations. How complexities inherent to real populations affect migration was exemplified by Atlantic cod in the North Sea and Skagerrak and was examined within an age-structured model that incorporated genetic markers. Migration was determined under various scen

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Exadactylos, Athanasios, Dimitrios Vafidis, Costas Tsigenopoulos, and Georgios Gkafas. "High Connectivity of the White Seabream (Diplodus sargus, L. 1758) in the Aegean Sea, Eastern Mediterranean Basin." Animals 9, no. 11 (2019): 979. http://dx.doi.org/10.3390/ani9110979.

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Population dynamics in the marine realm can shape species’ spatial structure and genetic variability between given geographical areas. Connectivity is an important factor of species’ population structure. In this study, we examined the genetic diversity and structure of white seabream (Diplodus sargus, L. 1758) in the eastern Mediterranean basin, using a panel of four microsatellite markers. Recorded low FST values within the study area indicate little evidence of genetic differentiation among populations. Results suggest high gene flow which may imply near-panmixia between populations, indica

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