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Adamova VV. Genetic variation in non-indigenous populations of the land snails Harmozica ravergiensis and Brephulopsis cylindrica (Gastropoda: Stylommatophora) in the south of the Central Russian Upland (Eastern Europe). MOLLUSCAN RESEARCH 2021. [DOI: 10.1080/13235818.2021.1892474] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Affiliation(s)
- Valeria V. Adamova
- Department of Biology, Belgorod State National Research University, Belgorod, Russia
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López B, Mejía O, Zúñiga G. The effect of landscape on functional connectivity and shell shape in the land snail Humboldtiana durangoensis. PeerJ 2020; 8:e9177. [PMID: 32509461 PMCID: PMC7245337 DOI: 10.7717/peerj.9177] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2020] [Accepted: 04/21/2020] [Indexed: 11/26/2022] Open
Abstract
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 redundance analysis and a Bayesian framework were used to evaluate connectivity. On the other hand, geometric morphometrics, phylogenetic principal component analysis and redundancy analysis were used for the analysis of shell shape. Our results suggest that the suitable areas have been decreasing since the LGM; also, vegetation cover rather than climate has influenced the genetic connectivity among land snail populations, although temperature had a high influence on shell shape in this species. In conclusion, vegetation cover was the main factor that determined the functional connectivity for the land snail; however, local selective pressures led to different phenotypes in shell shape that allowed us to postulate that each one of the previously defined genetic groups must be considered as a different ESU.
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Affiliation(s)
- Benjamín López
- Laboratorio de Variación Biológica y Evolución, Departamento de Zoología, Escuela Nacional de Ciencias Biológicas, Instituto Politécnico Nacional, Mexico City, Mexico
| | - Omar Mejía
- Laboratorio de Variación Biológica y Evolución, Departamento de Zoología, Escuela Nacional de Ciencias Biológicas, Instituto Politécnico Nacional, Mexico City, Mexico
| | - Gerardo Zúñiga
- Laboratorio de Variación Biológica y Evolución, Departamento de Zoología, Escuela Nacional de Ciencias Biológicas, Instituto Politécnico Nacional, Mexico City, Mexico
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Billerman SM, Jesmer BR, Watts AG, Schlichting PE, Fortin MJ, Funk WC, Hapeman P, Muths E, Murphy MA. Testing theoretical metapopulation conditions with genotypic data from Boreal Chorus Frogs (Pseudacris maculata). CAN J ZOOL 2019. [DOI: 10.1139/cjz-2018-0275] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The metapopulation concept has far-reaching implications in ecology and conservation biology. Hanski’s criteria operationally define metapopulations, yet testing them is hindered by logistical and financial constraints inherent to the collection of long-term demographic data. Hence, ecologists and conservationists often assume metapopulation existence for dispersal-limited species that occupy patchy habitats. To advance understanding of metapopulation theory and improve conservation of metapopulations, we used population and landscape genetic tools to develop a methodological framework for evaluating Hanski’s criteria. We used genotypic data (11 microsatellite loci) from a purported metapopulation of Boreal Chorus Frogs (Pseudacris maculata (Agassiz, 1850)) in Colorado, U.S.A., to test Hanski’s four criteria. We found support for each criterion: (1) significant genetic differentiation between wetlands, suggesting distinct breeding populations; (2) wetlands had small effective population sizes and recent bottlenecks, suggesting populations do not experience long-term persistence; (3) population graphs provided evidence of gene flow between patches, indicating potential for recolonization; and (4) multiscale bottleneck analyses suggest asynchrony, indicating that simultaneous extinction of all populations was unlikely. Our methodological framework provides a logistically and financially feasible alternative to long-term demographic data for identifying amphibian metapopulations.
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Affiliation(s)
- Shawn M. Billerman
- Program in Ecology, Department of Zoology and Physiology, University of Wyoming, Laramie, WY 82071, U.S.A
- University of Wyoming, Laramie, WY 82071, U.S.A
| | - Brett R. Jesmer
- Program in Ecology, Department of Zoology and Physiology, University of Wyoming, Laramie, WY 82071, U.S.A
- University of Wyoming, Laramie, WY 82071, U.S.A
| | - Alexander G. Watts
- Department of Ecology and Evolutionary Biology, University of Toronto, Toronto, ON M5S 3B2, Canada
- Li Ka Shing Knowledge Institute, St. Michael’s Hospital, Toronto, ON M5B 1T8, Canada
| | - Peter E. Schlichting
- Department of Natural Resources Management, Texas Tech University, Lubbock, TX 79409, U.S.A
- Arizona State University – Polytechnic Campus, Mesa, AZ 85212, U.S.A
| | - Marie-Josée Fortin
- Department of Ecology and Evolutionary Biology, University of Toronto, Toronto, ON M5S 3B2, Canada
| | - W. Chris Funk
- Department of Biology, Graduate Degree Program in Ecology, Colorado State University, Fort Collins, CO 80523, U.S.A
| | - Paul Hapeman
- Department of Biology, Central Connecticut State University, New Britain, CT 06053, U.S.A
| | - Erin Muths
- U.S. Geological Survey, Fort Collins Science Center, Fort Collins, CO 80526, U.S.A
| | - Melanie A. Murphy
- University of Wyoming, Laramie, WY 82071, U.S.A
- Department of Ecosystem Science and Management, University of Wyoming, Laramie, WY 82071, U.S.A
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López B, Gómez R, Mejía O. Strong genetic structure and signs of population bottlenecks in the land snail Humboldtiana durangoensisin the Sierra Madre Occidental of Western Mexico. J ZOOL SYST EVOL RES 2017. [DOI: 10.1111/jzs.12177] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Benjamín López
- Departamento de Zoología; Escuela Nacional de Ciencias Biológicas; Instituto Politécnico Nacional; Ciudad de México México
| | - Rocío Gómez
- Departamento de Toxicología; Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional (CINVESTAV-IPN); Mexico México
| | - Omar Mejía
- Departamento de Zoología; Escuela Nacional de Ciencias Biológicas; Instituto Politécnico Nacional; Ciudad de México México
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Rosin ZM, Lesicki A, Kwieciński Z, Skórka P, Tryjanowski P. Land snails benefit from human alterations in rural landscapes and habitats. Ecosphere 2017. [DOI: 10.1002/ecs2.1874] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Affiliation(s)
- Zuzanna M. Rosin
- Department of Cell Biology; Adam Mickiewicz University; Umultowska 89 61-614 Poznan Poland
| | - Andrzej Lesicki
- Department of Cell Biology; Adam Mickiewicz University; Umultowska 89 61-614 Poznan Poland
| | - Zbigniew Kwieciński
- Department of Avian Biology and Ecology; Adam Mickiewicz University; Umultowska 89 61-614 Poznan Poland
| | - Piotr Skórka
- Institute of Nature Conservation; Polish Academy of Sciences; Mickiewicza 33 31-120 Krakow Poland
| | - Piotr Tryjanowski
- Institute of Zoology; Poznań University of Life Sciences; Wojska Polskiego 71C 60-625 Poznan Poland
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Proćków M, Strzała T, Kuźnik-Kowalska E, Proćków J, Mackiewicz P. Ongoing Speciation and Gene Flow between Taxonomically Challenging Trochulus Species Complex (Gastropoda: Hygromiidae). PLoS One 2017; 12:e0170460. [PMID: 28107432 PMCID: PMC5249238 DOI: 10.1371/journal.pone.0170460] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2016] [Accepted: 01/05/2017] [Indexed: 11/18/2022] Open
Abstract
Geographical isolation, selection and genetic drift can cause the geographical diversification of populations and lead to speciation. Land snail species in the genus Trochulus show overlaps in geographical ranges as well as in morphology, but genetic data do not always support the species-level taxonomy based on morphological characters. Such a group offers an excellent opportunity to explore the processes involved. We have addressed the problem by determining the status of the restricted endemic T. graminicola within the larger context of Trochulus taxonomy. We used an integrated approach based on morphological features, ecological preferences and two molecular markers: mitochondrial COI sequences and microsatellites. Comparison of these results demonstrated: (i) conchological distinction of T. striolatus and T. sericeus; (ii) anatomical, ecological and genetic differentiation of T. graminicola and (iii) concordance between morphological characters and mtDNA markers in T. striolatus. Moreover, our data showed an intricate evolutionary history within the genus Trochulus, which can be best explained by: (i) recent or ongoing gene flow between taxa or (ii) their large ancestral polymorphism. Both of these hypotheses suggest that diversification within this group of snails has occurred relatively recently. The mismatches between species defined on morphology and on molecular genetics indicate the complexity of the processes involved in the diversification of this genus.
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Affiliation(s)
| | - Tomasz Strzała
- Department of Genetics, Faculty of Biology and Animal Science, Wrocław University of Environmental and Life Sciences, Wrocław, Poland
| | - Elżbieta Kuźnik-Kowalska
- Department of Invertebrate Systematics and Ecology, Institute of Biology, Wrocław University of Environmental and Life Sciences, Wrocław, Poland
| | - Jarosław Proćków
- Department of Plant Biology, Institute of Biology, Wrocław University of Environmental and Life Sciences, Wrocław, Poland
| | - Paweł Mackiewicz
- Department of Genomics, Faculty of Biotechnology, University of Wrocław, Wrocław, Poland
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Kramarenko SS. Patterns of spatio-temporal variation in land snails: a multi-scale approach. FOLIA MALACOLOGICA 2016. [DOI: 10.12657/folmal.024.008] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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8
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Cameron RAD, Cox RJ, Von Proschwitz T, Horsák M. Cepaea nemoralis (L.) in Göteborg, S.W. Sweden: variation in a recent urban invader. FOLIA MALACOLOGICA 2014. [DOI: 10.12657/folmal.022.016] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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OŻGO MAŁGORZATA, BOGUCKI ZDZISŁAW. Colonization, stability, and adaptation in a transplant experiment of the polymorphic land snailCepaea nemoralis(Gastropoda: Pulmonata) at the edge of its geographical range. Biol J Linn Soc Lond 2011. [DOI: 10.1111/j.1095-8312.2011.01732.x] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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10
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Fritsch C, Coeurdassier M, Gimbert F, Crini N, Scheifler R, de Vaufleury A. Investigations of responses to metal pollution in land snail populations (Cantareus aspersus and Cepaea nemoralis) from a smelter-impacted area. ECOTOXICOLOGY (LONDON, ENGLAND) 2011; 20:739-759. [PMID: 21369962 DOI: 10.1007/s10646-011-0619-z] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 02/21/2011] [Indexed: 05/30/2023]
Abstract
A cross-transplantation field experiment was performed to investigate about possible adaptation/acclimatization to metal pollution in common garden snail Cantareus aspersus (ex-Helix aspersa) and brown-lipped grove snail Cepaea nemoralis populations. Adults were collected from an area surrounding a former smelter (ME), highly polluted by trace metals (TMs) for decades, and from an unpolluted site (BE). Subadults of first generation (F1) were exposed in microcosms in a 28-day kinetic study. Four exposure sites were chosen around the smelter along a soil pollution gradient (vegetation and soil otherwise comparable). Bioaccumulation in snail soft tissues globally increased with soil contamination, with Cd, Pb and Zn concentrations reaching 271, 187, 5527 μg g(-1), respectively. Accumulation kinetic patterns were similar between snail species but C. nemoralis showed greater TM levels than C. aspersus. Some inter-population differences were revealed in TM accumulation (bioaccumulation factors, accumulation kinetics) but did not suggest consistent adaptive responses. We did not detect negative effects of TM exposure on snail condition (body weight, shell size, shell weight). ME C. aspersus snails produced heavier shells than BE snails under exposure to TMs at the highest level, suggesting an adaptive response. The protocol used in this study, however, did not allow unambiguously distinguishing whether this response was due to genetic adaptation or to maternal effects. Abnormal but reversible shell development of adult ME C. nemoralis suggested physiological acclimatization. Differences in responses to TMs between populations are observed for conchological parameters, not for bioaccumulation, with different strategies according to the species (acclimatization or adaptation/maternal effects).
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Affiliation(s)
- Clémentine Fritsch
- Chrono-Environment, UMR 6249 University of Franche-Comté/CNRS Usc INRA, Place Leclerc, 25030, Besançon Cedex, France
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11
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The genetic dynamics of the rapid and recent colonization of Denmark by Arion lusitanicus (Mollusca, Pulmonata, Arionidae). Genetica 2011; 139:709-21. [DOI: 10.1007/s10709-011-9565-1] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2010] [Accepted: 02/24/2011] [Indexed: 10/18/2022]
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12
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OŻGO MAŁGORZATA. Rapid evolution in unstable habitats: a success story of the polymorphic land snail Cepaea nemoralis (Gastropoda: Pulmonata). Biol J Linn Soc Lond 2011. [DOI: 10.1111/j.1095-8312.2010.01585.x] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
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13
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Lindström T, Håkansson N, Wennergren U. The shape of the spatial kernel and its implications for biological invasions in patchy environments. Proc Biol Sci 2010; 278:1564-71. [PMID: 21047854 DOI: 10.1098/rspb.2010.1902] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Ecological and epidemiological invasions occur in a spatial context. We investigated how these processes correlate to the distance dependence of spread or dispersal between spatial entities such as habitat patches or epidemiological units. Distance dependence is described by a spatial kernel, characterized by its shape (kurtosis) and width (variance). We also developed a novel method to analyse and generate point-pattern landscapes based on spectral representation. This involves two measures: continuity, which is related to autocorrelation and contrast, which refers to variation in patch density. We also analysed some empirical data where our results are expected to have implications, namely distributions of trees (Quercus and Ulmus) and farms in Sweden. Through a simulation study, we found that kernel shape was not important for predicting the invasion speed in randomly distributed patches. However, the shape may be essential when the distribution of patches deviates from randomness, particularly when the contrast is high. We conclude that the speed of invasions depends on the spatial context and the effect of the spatial kernel is intertwined with the spatial structure. This implies substantial demands on the empirical data, because it requires knowledge of shape and width of the spatial kernel, and spatial structure.
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Affiliation(s)
- Tom Lindström
- IFM Theory and Modelling, Linköping University, 581 83 Linköping, Sweden
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Row JR, Blouin-Demers G, Lougheed SC. Habitat distribution influences dispersal and fine-scale genetic population structure of eastern foxsnakes (Mintonius gloydi) across a fragmented landscape. Mol Ecol 2010; 19:5157-71. [PMID: 20977510 DOI: 10.1111/j.1365-294x.2010.04872.x] [Citation(s) in RCA: 71] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Dispersal is a fundamental attribute of species in nature and shapes population dynamics, evolutionary trajectories and genetic variation across spatial and temporal scales. It is increasingly clear that landscape features have large impacts on dispersal patterns. Thus, understanding how individuals and species move through landscapes is essential for predicting impacts of landscape alterations. Information on dispersal patterns, however, is lacking for many taxa, particularly reptiles. Eastern foxsnakes (Mintoinus gloydi) are marsh and prairie specialists that avoid agricultural fields, but they have persisted across a fragmented region in southwestern Ontario and northern Ohio. Here, we combined habitat suitability modelling with population genetic analyses to infer how foxsnakes disperse through a habitat mosaic of natural and altered landscape features. Boundary regions between the eight genetic clusters, identified through assignment tests, were comprised of low suitability habitat (e.g. agricultural fields). Island populations were grouped into a single genetic cluster, and comparatively low F(ST) values between island and mainland populations suggest open water presents less of a barrier than nonsuitable terrestrial habitat. Isolation by resistance and least-cost path analysis produced similar results with matrices of pairwise individual genetic distance significantly more correlated to matrices of resistance values derived from habitat suitability than models with an undifferentiated landscape. Spatial autocorrelation results matched better with assignment results when incorporating resistance values rather than straight-line distances. All analyses used in our study produced similar results suggesting that habitat degradation limits dispersal for foxsnakes, which has had a strong effect on the genetic population structure across this region.
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Affiliation(s)
- Jeffrey R Row
- Department of Biology, Queen's University, 116 Barrie Street, Kingston, ON K7L 3N6, Canada
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Hu Y, Zhan X, Qi D, Wei F. Spatial genetic structure and dispersal of giant pandas on a mountain-range scale. CONSERV GENET 2010. [DOI: 10.1007/s10592-010-0100-1] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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16
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WANG IANJ, SUMMERS KYLE. Genetic structure is correlated with phenotypic divergence rather than geographic isolation in the highly polymorphic strawberry poison-dart frog. Mol Ecol 2010; 19:447-58. [DOI: 10.1111/j.1365-294x.2009.04465.x] [Citation(s) in RCA: 172] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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KAPPES HEIKE, JORDAENS KURT, VAN HOUTTE NATALIE, HENDRICKX FREDERIK, MAELFAIT JEANPIERRE, LENS LUC, BACKELJAU THIERRY. A land snail's view of a fragmented landscape. Biol J Linn Soc Lond 2009. [DOI: 10.1111/j.1095-8312.2009.01321.x] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Ursenbacher S, Alvarez C, Armbruster GFJ, Baur B. High population differentiation in the rock-dwelling land snail (Trochulus caelatus) endemic to the Swiss Jura Mountains. CONSERV GENET 2009. [DOI: 10.1007/s10592-009-9956-3] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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CAMERON ROBERTAD, POKRYSZKO BEATAM, HORSÁK MICHAL. Contrasting patterns of variation in urban populations of Cepaea (Gastropoda: Pulmonata): a tale of two cities. Biol J Linn Soc Lond 2009. [DOI: 10.1111/j.1095-8312.2008.01187.x] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Lindström T, Håkansson N, Westerberg L, Wennergren U. Splitting the tail of the displacement kernel shows the unimportance of kurtosis. Ecology 2008; 89:1784-90. [PMID: 18705366 DOI: 10.1890/07-1363.1] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Animals disperse in space through different movement behaviors, resulting in different displacement distances. This is often described with a displacement kernel where the long-distance dispersers are within the tail of the kernel. A displacement with a large proportion of long-distance dispersers may have impact on different aspects of spatial ecology such as invasion speed, population persistence, and distribution. It is, however, unclear whether the kurtosis of the kernel plays a major role since a fatter tail also influences the variance of the kernel. We modeled displacement in landscapes with different amounts and configurations of habitats and handled kurtosis and variance separately to study how these affected population distribution and transition time. We conclude that kurtosis is not important for any of these aspects of spatial ecology. The variance of the kernel, on the other hand, was of great importance to both population distribution and transition time. We argue that separating variance and kurtosis can cast new light on the way in which long-distance dispersers are important in ecological processes. Consequences for empirical studies are discussed.
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Affiliation(s)
- Tom Lindström
- IFM, Theory and Modelling, Linköpings Universitet, Linköpings, Sweden
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WORTHINGTON WILMER J, ELKIN C, WILCOX C, MURRAY L, NIEJALKE D, POSSINGHAM H. The influence of multiple dispersal mechanisms and landscape structure on population clustering and connectivity in fragmented artesian spring snail populations. Mol Ecol 2008; 17:3733-51. [DOI: 10.1111/j.1365-294x.2008.03861.x] [Citation(s) in RCA: 52] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Armbruster GF, Hofer M, Baur B. Effect of cliff connectivity on the genetic population structure of a rock-dwelling land snail species with frequent self-fertilization. BIOCHEM SYST ECOL 2007. [DOI: 10.1016/j.bse.2006.12.005] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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24
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Sander AC, Purtauf T, Wolters V, Dauber J. Landscape genetics of the widespread ground-beetle Carabus auratus in an agricultural region. Basic Appl Ecol 2006. [DOI: 10.1016/j.baae.2006.01.001] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Jordaens K, De Wolf H, Van Houtte N, Vandecasteele B, Backeljau T. Genetic variation in two land snails, Cepaea nemoralis and Succinea putris (Gastropoda, Pulmonata), from sites differing in heavy metal content. Genetica 2006; 128:227-39. [PMID: 17028953 DOI: 10.1007/s10709-005-5705-9] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2005] [Accepted: 12/02/2005] [Indexed: 10/24/2022]
Abstract
Allozyme variation was determined in two land snail species (Cepaea nemoralis and Succinea putris) from four localities in northern Belgium. In each locality we selected a polluted and a nearby, less-polluted, reference plot. We examined whether (i) genetic variability differed between the polluted and reference plots, (ii) populations from polluted plots experienced recent bottlenecks, and (iii) certain allele or genotype frequencies were associated with the pollution. Our results suggest that (i) about 13% of the genetic differentiation in C. nemoralis and 5% in S. putris was due to differences among polluted and reference plots, (ii) polluted and reference plots had comparable levels of genetic variation, but in C. nemoralis observed heterozygosities were higher in polluted plots, (iii) most plots showed significant evidence for recent bottlenecks, irrespective of the degree of pollution, so that bottlenecks seem poor indicators of pollution-induced stress in land snails, and (iv) mutagenic or pollution-induced modifications did not seem to account for new allozyme variants in polluted sites. The observed patterns of genetic variation may be explained by the action of genetic drift, pollution-mediated selection, restricted gene flow, or a combination of these processes.
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Affiliation(s)
- Kurt Jordaens
- Department of Biology, Evolutionary Biology Group, University of Antwerp, Groenenborgerlaan 171, B-2020, Antwerp, Belgium.
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HAMILTON GS, MATHER PB, WILSON JC. Habitat heterogeneity influences connectivity in a spatially structured pest population. J Appl Ecol 2006. [DOI: 10.1111/j.1365-2664.2006.01132.x] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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28
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