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Cooper RD, Shaffer HB. Managing invasive hybrids with pond hydroperiod manipulation in an endangered salamander system. CONSERVATION BIOLOGY : THE JOURNAL OF THE SOCIETY FOR CONSERVATION BIOLOGY 2024; 38:e14167. [PMID: 37551773 DOI: 10.1111/cobi.14167] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/16/2022] [Revised: 07/07/2023] [Accepted: 07/31/2023] [Indexed: 08/09/2023]
Abstract
When invasive and endangered native taxa hybridize, the resulting admixture introduces novel conservation challenges. Across a large region of central California, a hybrid swarm consisting of admixed endangered California tiger salamanders (CTS) (Ambystoma californiense) and introduced barred tiger salamanders (BTS) (Ambystoma mavortium) has replaced native populations, threatening the genetic integrity of CTS and the vernal pool systems they inhabit. We employed a large-scale, genomically informed field experiment to test whether shortening breeding pond hydroperiod would favor native CTS genotypes. We constructed 14 large, seminatural ponds to evaluate the effect of hydroperiod duration on larval survival and mass at metamorphosis. We tracked changes in non-native allele frequencies with a 5237-gene exon capture array and employed a combination of custom Bayesian and generalized linear models to quantify the effect of pond duration on salamander fitness. Earlier work on this system showed hybrid superiority under many conditions and suggested that hybrids are favored in human-modified ponds with artificially long hydroperiods. Consistent with these earlier studies, we found overwhelming evidence for hybrid superiority. Very short hydroperiods substantially reduced the mass (1.1-1.5 fold) and survival probability (10-13 fold) of both native and hybrid larvae, confirming that hydroperiod likely exerts a strong selective pressure in the wild. We identified 86 genes, representing 1.8% of 4723 screened loci, that significantly responded to this hydroperiod-driven selection. In contrast to earlier work, under our more natural experimental conditions, native CTS survival and size at metamorphosis were always less than hybrids, suggesting that hydroperiod management alone will not shift selection to favor native larval genotypes. However, shortening pond hydroperiod may limit productivity of hybrid ponds, complementing other strategies to remove hybrids while maintaining vernal pool ecosystems. This study confirms and expands on previous work that highlights the importance of hydroperiod management to control invasive aquatic species.
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Affiliation(s)
- Robert D Cooper
- Department of Ecology and Evolutionary Biology, University of California, Los Angeles, Los Angeles, California, USA
- La Kretz Center for California Conservation Science, Institute of the Environment and Sustainability, University of California, Los Angeles, Los Angeles, California, USA
| | - H Bradley Shaffer
- Department of Ecology and Evolutionary Biology, University of California, Los Angeles, Los Angeles, California, USA
- La Kretz Center for California Conservation Science, Institute of the Environment and Sustainability, University of California, Los Angeles, Los Angeles, California, USA
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2
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Sinervo B, Lara Reséndiz RA, Miles DB, Lovich JE, Rosen PC, Gadsden H, Gaytán GC, Tessaro PG, Luja VH, Huey RB, Whipple A, Cordero VS, Rohr JB, Caetano G, Santos JC, Sites JW, Méndez de la Cruz FR. Climate change and collapsing thermal niches of desert reptiles and amphibians: Assisted migration and acclimation rescue from extirpation. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 908:168431. [PMID: 37951272 DOI: 10.1016/j.scitotenv.2023.168431] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/08/2023] [Revised: 10/02/2023] [Accepted: 11/06/2023] [Indexed: 11/13/2023]
Abstract
Recent climate change should result in expansion of species to northern or high elevation range margins, and contraction at southern and low elevation margins in the northern hemisphere, because of local extirpations or range shifts or both. We combined museum occurrence records from both the continental U.S. and Mexico with a new eco-physiological model of extinction developed for lizard families of the world to predict the distributions of 30 desert-endemic reptile and amphibian species under climate change scenarios. The model predicts that 38 % of local populations will go extinct in the next 50 years, across all 30 species. However, extinctions may be attenuated in forested sites and by the presence of montane environments in contemporary ranges. Of the 30 species, three were at very high risk of extinction as a result of their thermal limits being exceeded, which illustrates the predictive value of ecophysiological modeling approaches for conservation studies. In tandem with global strategies of limiting CO2 emissions, we propose urgent regional management strategies for existing and new reserves that are targeted at three species: Barred Tiger Salamander (Ambystomatidae: Ambystoma mavortium stebbinsi), Desert Short-horned Lizard (Phrynosomatidae: Phrynosoma ornatissimum), and Morafka's Desert Tortoise (Testudinidae: Gopherus morafkai), which face a high risk of extinction by 2070. These strategies focus on assisted migration and preservation within climatic refugia, such as high-elevation and forested habitats. We forecast where new reserves should be established by merging our model of extinction risk with gap analysis. We also highlight that acclimation (i.e., phenotypic plasticity) could ameliorate risk of extinction but is rarely included in ecophysiological models. We use Ambystoma salamanders to show how acclimation can be incorporated into such models of extinction risk.
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Affiliation(s)
- Barry Sinervo
- The Institute for the Study of the Ecological and Evolutionary Climate Impacts, Department of Ecology and Evolutionary Biology, University of California Santa Cruz, CA 95064, USA
| | - Rafael A Lara Reséndiz
- The Institute for the Study of the Ecological and Evolutionary Climate Impacts, Department of Ecology and Evolutionary Biology, University of California Santa Cruz, CA 95064, USA; Instituto Tecnológico de Sonora, Cd. Obregón, Sonora, Mexico
| | - Donald B Miles
- Department of Biological Sciences, Ohio University, Athens, OH 45701, USA.
| | - Jeffrey E Lovich
- U.S. Geological Survey, Southwest Biological Science Center, 2255 North Gemini Drive, MS-9394, Flagstaff, AZ 86001, USA
| | - Philip C Rosen
- School of Natural Resources & the Environment, University of Arizona, Tucson, AZ 85721, USA
| | - Héctor Gadsden
- Instituto de Ecología, A.C.-Centro Regional del Bajío, Avenida Lázaro Cárdenas N(o)253, 61600 Pátzcuaro, Michoacán, Mexico
| | - Gamaliel Casteñada Gaytán
- Facultad en Ciencias Biológicas, Universidad Juárez del Estado de Durango, Gómez Palacio, Durango, Mexico
| | | | - Víctor H Luja
- Coordinación de Investigación y Posgrado, Unidad Académica de Turismo, Universidad Autónoma de Nayarit, Ciudad de la Cultura S/N. C.P., 63000 Tepic, Nayarit, Mexico
| | - Raymond B Huey
- Department of Biology, University of Washington, Seattle, WA 98195, USA
| | - Amy Whipple
- Department of Biological Sciences, Northern Arizona University, Flagstaff, AZ 86011, USA
| | - Víctor Sánchez Cordero
- Departamento de Zoología, Instituto de Biología, Universidad Nacional Autónoma de Mexico, Mexico City, Mexico
| | - Jason B Rohr
- Department of Biological Sciences, University of Notre Dame, Notre Dame, IN, USA
| | - Gabriel Caetano
- The Jacob Blaustein Institutes for Desert Research, Ben-Gurion University of the Negev, Midreshet Ben-Gurion 849900, Israel
| | - Juan C Santos
- Department of Biological Sciences, St. John's University, Queens, New York, NY 11439, USA
| | - Jack W Sites
- Department of Biology, Brigham Young University, Provo, UT 84602, USA
| | - Fausto R Méndez de la Cruz
- Department of Biological Sciences, Ohio University, Athens, OH 45701, USA; Laboratorio de Herpetología, Instituto de Biología, Universidad Nacional Autónoma de México, Ciudad de México 04510, Mexico
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3
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Hirashiki C, Kareiva P, Marvier M. Concern over hybridization risks should not preclude conservation interventions. CONSERVATION SCIENCE AND PRACTICE 2021. [DOI: 10.1111/csp2.424] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022] Open
Affiliation(s)
- Claire Hirashiki
- Institute of the Environment and Sustainability University of California, Los Angeles Los Angeles California USA
| | | | - Michelle Marvier
- Department of Environmental Studies and Sciences Santa Clara University Santa Clara California USA
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4
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Cooper RD, Shaffer HB. Allele-specific expression and gene regulation help explain transgressive thermal tolerance in non-native hybrids of the endangered California tiger salamander (Ambystoma californiense). Mol Ecol 2021; 30:987-1004. [PMID: 33338297 DOI: 10.1111/mec.15779] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2019] [Revised: 11/30/2020] [Accepted: 12/11/2020] [Indexed: 01/26/2023]
Abstract
Hybridization between native and non-native species is an ongoing global conservation threat. Hybrids that exhibit traits and tolerances that surpass parental values are of particular concern, given their potential to outperform native species. Effective management of hybrid populations requires an understanding of both physiological performance and the underlying mechanisms that drive transgressive hybrid traits. Here, we explore several aspects of the hybridization between the endangered California tiger salamander (Ambystoma californiense; CTS) and the introduced barred tiger salamander (Ambystoma mavortium; BTS). We assayed critical thermal maximum (CTMax) to compare the ability of CTS, BTS and F1 hybrids to tolerate acute thermal stress, and found that hybrids exhibit a wide range of CTMax values, with 33% (4/12) able to tolerate temperatures greater than either parent. We then quantified the genomic response, measured at the RNA transcript level, of each salamander, to explore the mechanisms underlying thermal tolerance strategies. We found that CTS and BTS have strikingly different values and tissue-specific patterns of overall gene expression, with hybrids expressing intermediate values. F1 hybrids display abundant and variable degrees of allele-specific expression (ASE), likely arising from extensive compensatory evolution in gene regulatory mechanisms between CTS and BTS. We found evidence that the proportion of genes with allelic imbalance in individual hybrids correlates with their CTMax, suggesting a link between ASE and expanded thermal tolerance that may contribute to the success of hybrid salamanders in California. Future climate change may further complicate management of CTS if hybrid salamanders are better equipped to deal with rising temperatures.
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Affiliation(s)
- Robert D Cooper
- Department of Ecology and Evolutionary Biology, University of California, Los Angeles, CA, USA.,La Kretz Center for California Conservation Science, Institute of the Environment and Sustainability, University of California, Los Angeles, CA, USA
| | - H Bradley Shaffer
- Department of Ecology and Evolutionary Biology, University of California, Los Angeles, CA, USA.,La Kretz Center for California Conservation Science, Institute of the Environment and Sustainability, University of California, Los Angeles, CA, USA
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5
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Hudson J, McQuaid CD, Rius M. Contemporary climate change hinders hybrid performance of ecologically dominant marine invertebrates. J Evol Biol 2020; 34:60-72. [PMID: 32096898 DOI: 10.1111/jeb.13609] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2019] [Revised: 02/03/2020] [Accepted: 02/15/2020] [Indexed: 12/28/2022]
Abstract
Human activities alter patterns of biodiversity, particularly through species extinctions and range shifts. Two of these activities are human mediated transfer of species and contemporary climate change, and both allow previously isolated genotypes to come into contact and hybridize, potentially altering speciation rates. Hybrids have been shown to survive environmental conditions not tolerated by either parent, suggesting that, under some circumstances, hybrids may be able to expand their ranges and perform well under rapidly changing conditions. However, studies assessing how hybridization influences contemporary range shifts are scarce. We performed crosses on Pyura herdmani and Pyura stolonifera (Chordata, Tunicata), two closely related marine invertebrate species that are ecologically dominant and can hybridize. These sister species live in sympatry along the coasts of southern Africa, but one has a disjunct distribution that includes northern hemisphere sites. We experimentally assessed the performance of hybrid and parental crosses using different temperature regimes, including temperatures predicted under future climate change scenarios. We found that hybrids showed lower performance than parental crosses at the experimental temperatures, suggesting that hybrids are unlikely to expand their ranges to new environments. In turn, we found that the more widespread species performed better at a wide array of temperatures, indicating that this parental species may cope better with future conditions. This study illustrates how offspring fitness may provide key insights to predict range expansions and how contemporary climate change may mediate both the ability of hybrids to expand their ranges and the occurrence of speciation as a result of hybridization.
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Affiliation(s)
- Jamie Hudson
- School of Ocean and Earth Science, National Oceanography Centre Southampton, University of Southampton, Southampton, UK
| | | | - Marc Rius
- School of Ocean and Earth Science, National Oceanography Centre Southampton, University of Southampton, Southampton, UK.,Department of Zoology, Centre for Ecological Genomics and Wildlife Conservation, University of Johannesburg, Auckland Park, South Africa
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6
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Caruso NM, Rissler LJ. Demographic consequences of climate variation along an elevational gradient for a montane terrestrial salamander. POPUL ECOL 2018. [DOI: 10.1002/1438-390x.1005] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Nicholas M. Caruso
- Department of Biological Sciences University of Alabama Tuscaloosa Alabama
| | - Leslie J. Rissler
- Department of Biological Sciences University of Alabama Tuscaloosa Alabama
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7
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Saastamoinen M, Bocedi G, Cote J, Legrand D, Guillaume F, Wheat CW, Fronhofer EA, Garcia C, Henry R, Husby A, Baguette M, Bonte D, Coulon A, Kokko H, Matthysen E, Niitepõld K, Nonaka E, Stevens VM, Travis JMJ, Donohue K, Bullock JM, Del Mar Delgado M. Genetics of dispersal. Biol Rev Camb Philos Soc 2017; 93:574-599. [PMID: 28776950 PMCID: PMC5811798 DOI: 10.1111/brv.12356] [Citation(s) in RCA: 127] [Impact Index Per Article: 18.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2017] [Revised: 07/03/2017] [Accepted: 07/05/2017] [Indexed: 12/12/2022]
Abstract
Dispersal is a process of central importance for the ecological and evolutionary dynamics of populations and communities, because of its diverse consequences for gene flow and demography. It is subject to evolutionary change, which begs the question, what is the genetic basis of this potentially complex trait? To address this question, we (i) review the empirical literature on the genetic basis of dispersal, (ii) explore how theoretical investigations of the evolution of dispersal have represented the genetics of dispersal, and (iii) discuss how the genetic basis of dispersal influences theoretical predictions of the evolution of dispersal and potential consequences. Dispersal has a detectable genetic basis in many organisms, from bacteria to plants and animals. Generally, there is evidence for significant genetic variation for dispersal or dispersal‐related phenotypes or evidence for the micro‐evolution of dispersal in natural populations. Dispersal is typically the outcome of several interacting traits, and this complexity is reflected in its genetic architecture: while some genes of moderate to large effect can influence certain aspects of dispersal, dispersal traits are typically polygenic. Correlations among dispersal traits as well as between dispersal traits and other traits under selection are common, and the genetic basis of dispersal can be highly environment‐dependent. By contrast, models have historically considered a highly simplified genetic architecture of dispersal. It is only recently that models have started to consider multiple loci influencing dispersal, as well as non‐additive effects such as dominance and epistasis, showing that the genetic basis of dispersal can influence evolutionary rates and outcomes, especially under non‐equilibrium conditions. For example, the number of loci controlling dispersal can influence projected rates of dispersal evolution during range shifts and corresponding demographic impacts. Incorporating more realism in the genetic architecture of dispersal is thus necessary to enable models to move beyond the purely theoretical towards making more useful predictions of evolutionary and ecological dynamics under current and future environmental conditions. To inform these advances, empirical studies need to answer outstanding questions concerning whether specific genes underlie dispersal variation, the genetic architecture of context‐dependent dispersal phenotypes and behaviours, and correlations among dispersal and other traits.
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Affiliation(s)
- Marjo Saastamoinen
- Department of Biosciences, Metapopulation Research Centre, University of Helsinki, P.O. Box 65, 00014 Helsinki, Finland
| | - Greta Bocedi
- School of Biological Sciences, University of Aberdeen, Aberdeen AB24 2TZ, U.K
| | - Julien Cote
- Laboratoire Évolution & Diversité Biologique UMR5174, CNRS, Université Toulouse III Paul Sabatier, 31062 Toulouse, France
| | - Delphine Legrand
- Centre National de la Recherche Scientifique and Université Paul Sabatier Toulouse III, SETE Station d'Ecologie Théorique et Expérimentale, UMR 5321, 09200 Moulis, France
| | - Frédéric Guillaume
- Department of Evolutionary Biology and Environmental Studies, University of Zurich, CH-8057 Zurich, Switzerland
| | - Christopher W Wheat
- Population Genetics, Department of Zoology, Stockholm University, S-10691 Stockholm, Sweden
| | - Emanuel A Fronhofer
- Department of Evolutionary Biology and Environmental Studies, University of Zurich, CH-8057 Zurich, Switzerland.,Department of Aquatic Ecology, Eawag, Swiss Federal Institute of Aquatic Science and Technology, CH-8600 Dubendorf, Switzerland
| | - Cristina Garcia
- CIBIO-InBIO, Universidade do Porto, 4485-661 Vairão, Portugal
| | - Roslyn Henry
- School of Biological Sciences, University of Aberdeen, Aberdeen AB24 2TZ, U.K.,School of GeoSciences, University of Edinburgh, Edinburgh EH89XP, U.K
| | - Arild Husby
- Department of Biosciences, Metapopulation Research Centre, University of Helsinki, P.O. Box 65, 00014 Helsinki, Finland
| | - Michel Baguette
- Centre National de la Recherche Scientifique and Université Paul Sabatier Toulouse III, SETE Station d'Ecologie Théorique et Expérimentale, UMR 5321, 09200 Moulis, France.,Museum National d'Histoire Naturelle, Institut Systématique, Evolution, Biodiversité, UMR 7205, F-75005 Paris, France
| | - Dries Bonte
- Department of Biology, Ghent University, B-9000 Ghent, Belgium
| | - Aurélie Coulon
- PSL Research University, CEFE UMR 5175, CNRS, Université de Montpellier, Université Paul-Valéry Montpellier, EPHE, Biogéographie et Ecologie des Vertébrés, 34293 Montpellier, France.,CESCO UMR 7204, Bases écologiques de la conservation, Muséum national d'Histoire naturelle, 75005 Paris, France
| | - Hanna Kokko
- Department of Evolutionary Biology and Environmental Studies, University of Zurich, CH-8057 Zurich, Switzerland
| | - Erik Matthysen
- Evolutionary Ecology Group, Department of Biology, University of Antwerp, Universiteitsplein 1, 2610 Wilrijk, Belgium
| | - Kristjan Niitepõld
- Department of Biosciences, Metapopulation Research Centre, University of Helsinki, P.O. Box 65, 00014 Helsinki, Finland
| | - Etsuko Nonaka
- Department of Biosciences, Metapopulation Research Centre, University of Helsinki, P.O. Box 65, 00014 Helsinki, Finland
| | - Virginie M Stevens
- Centre National de la Recherche Scientifique and Université Paul Sabatier Toulouse III, SETE Station d'Ecologie Théorique et Expérimentale, UMR 5321, 09200 Moulis, France
| | - Justin M J Travis
- School of Biological Sciences, University of Aberdeen, Aberdeen AB24 2TZ, U.K
| | | | - James M Bullock
- NERC Centre for Ecology & Hydrology, Wallingford OX10 8BB, U.K
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8
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Denton RD, Greenwald KR, Gibbs HL. Locomotor endurance predicts differences in realized dispersal between sympatric sexual and unisexual salamanders. Funct Ecol 2016. [DOI: 10.1111/1365-2435.12813] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Affiliation(s)
- Robert D. Denton
- Department of Evolution, Ecology and Organismal Biology Ohio State University, 300 Aronoff Laboratory, 318 West 12th Avenue Columbus OH 43210 USA
- Ohio Biodiversity Conservation Partnership Ohio State University, 300 Aronoff Laboratory, 318 West 12th Avenue Columbus OH 43210 USA
| | - Katherine R. Greenwald
- Department of Biology Eastern Michigan University, 441 Mark Jefferson Science Complex Ypsilanti MI 48197 USA
| | - H. Lisle Gibbs
- Department of Evolution, Ecology and Organismal Biology Ohio State University, 300 Aronoff Laboratory, 318 West 12th Avenue Columbus OH 43210 USA
- Ohio Biodiversity Conservation Partnership Ohio State University, 300 Aronoff Laboratory, 318 West 12th Avenue Columbus OH 43210 USA
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9
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Greenwald KR, Denton RD, Gibbs HL. Niche partitioning among sexual and unisexual
Ambystoma
salamanders. Ecosphere 2016. [DOI: 10.1002/ecs2.1579] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Affiliation(s)
- Katherine R. Greenwald
- Department of BiologyEastern Michigan University 441 Mark Jefferson Science Complex Ypsilanti Michigan 48197 USA
- Ohio Biodiversity Conservation PartnershipThe Ohio State University 300 Aronoff Laboratory Columbus Ohio 43210 USA
| | - Robert D. Denton
- Ohio Biodiversity Conservation PartnershipThe Ohio State University 300 Aronoff Laboratory Columbus Ohio 43210 USA
- Department of Evolution, Ecology and Organismal BiologyThe Ohio State University 300 Aronoff Laboratory Columbus Ohio 43210 USA
| | - H. Lisle Gibbs
- Ohio Biodiversity Conservation PartnershipThe Ohio State University 300 Aronoff Laboratory Columbus Ohio 43210 USA
- Department of Evolution, Ecology and Organismal BiologyThe Ohio State University 300 Aronoff Laboratory Columbus Ohio 43210 USA
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10
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Heredia-Bobadilla RL, Monroy-Vilchis O, Zarco-González MM, Martínez-Gómez D, Mendoza-Martínez GD, Sunny A. Genetic structure and diversity in an isolated population of an endemic mole salamander (Ambystoma rivulare Taylor, 1940) of central Mexico. Genetica 2016; 144:689-698. [PMID: 27796527 DOI: 10.1007/s10709-016-9935-9] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2016] [Accepted: 10/18/2016] [Indexed: 11/28/2022]
Abstract
Human activities are affecting the distribution of species worldwide by causing fragmentation and isolation of populations. Isolation and fragmentation lead to populations with lower genetic variability and an increased chance of inbreeding and genetic drift, which results in a loss of biological fitness over time. Studies of the genetic structure of small and isolated populations are critically important for management and conservation decisions. Ambystoma rivulare is a micro-endemic Mexican mole salamander from central Mexico. It is found in the most ecologically disturbed region in Mexico, the Trans-Mexican Volcanic Belt. The goal of this study of the population genetics of the micro-endemic mole salamander was to provide information to be used as a basis for future research and conservation planning of this species and other species of the Ambystoma genus in Mexico. The structural analysis found two subpopulations, one for each river sampled, with no signs of admixture and very high levels of genetic differentiation. Medium to high levels of heterozygosity and few alleles and genotypes were observed. Evidence of an ancestral genetic bottleneck, low values of effective population size, small inbreeding coefficients, and low gene flow were also found.
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Affiliation(s)
- Rosa-Laura Heredia-Bobadilla
- Centro de Investigación en Ciencias Biológicas Aplicadas, Universidad Autónoma del Estado de México, Instituto literario # 100, Colonia Centro, CP 50000, Toluca, Estado de México, Mexico
| | - Octavio Monroy-Vilchis
- Centro de Investigación en Ciencias Biológicas Aplicadas, Universidad Autónoma del Estado de México, Instituto literario # 100, Colonia Centro, CP 50000, Toluca, Estado de México, Mexico.
| | - Martha M Zarco-González
- Centro de Investigación en Ciencias Biológicas Aplicadas, Universidad Autónoma del Estado de México, Instituto literario # 100, Colonia Centro, CP 50000, Toluca, Estado de México, Mexico
| | - Daniel Martínez-Gómez
- Departamento de Producción Agrícola y Animal, Universidad Autónoma Metropolitana Xochimilco, Calz. Del Hueso 1100, Col. Villa Quietud, 04960, Mexico city, Mexico
| | - Germán David Mendoza-Martínez
- Departamento de Producción Agrícola y Animal, Universidad Autónoma Metropolitana Xochimilco, Calz. Del Hueso 1100, Col. Villa Quietud, 04960, Mexico city, Mexico
| | - Armando Sunny
- Centro de Investigación en Ciencias Biológicas Aplicadas, Universidad Autónoma del Estado de México, Instituto literario # 100, Colonia Centro, CP 50000, Toluca, Estado de México, Mexico
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11
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Larsen S, Muehlbauer JD, Marti E. Resource subsidies between stream and terrestrial ecosystems under global change. GLOBAL CHANGE BIOLOGY 2016; 22:2489-2504. [PMID: 26649817 DOI: 10.1111/gcb.13182] [Citation(s) in RCA: 52] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/20/2015] [Revised: 11/15/2015] [Accepted: 11/20/2015] [Indexed: 06/05/2023]
Abstract
Streams and adjacent terrestrial ecosystems are characterized by permeable boundaries that are crossed by resource subsidies. Although the importance of these subsidies for riverine ecosystems is increasingly recognized, little is known about how they may be influenced by global environmental change. Drawing from available evidence, in this review we propose a conceptual framework to evaluate the effects of global change on the quality and spatiotemporal dynamics of stream-terrestrial subsidies. We illustrate how changes to hydrological and temperature regimes, atmospheric CO2 concentration, land use and the distribution of nonindigenous species can influence subsidy fluxes by affecting the biology and ecology of donor and recipient systems and the physical characteristics of stream-riparian boundaries. Climate-driven changes in the physiology and phenology of organisms with complex life cycles will influence their development time, body size and emergence patterns, with consequences for adjacent terrestrial consumers. Also, novel species interactions can modify subsidy dynamics via complex bottom-up and top-down effects. Given the seasonality and pulsed nature of subsidies, alterations of the temporal and spatial synchrony of resource availability to consumers across ecosystems are likely to result in ecological mismatches that can scale up from individual responses, to communities, to ecosystems. Similarly, altered hydrology, temperature, CO2 concentration and land use will modify the recruitment and quality of riparian vegetation, the timing of leaf abscission and the establishment of invasive riparian species. Along with morphological changes to stream-terrestrial boundaries, these will alter the use and fluxes of allochthonous subsidies associated with stream ecosystems. Future research should aim to understand how subsidy dynamics will be affected by key drivers of global change, including agricultural intensification, increasing water use and biotic homogenization. Our conceptual framework based on the match-mismatch between donor and recipient organisms may facilitate understanding of the multiple effects of global change and aid in the development of future research questions.
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Affiliation(s)
- Stefano Larsen
- Synthesis Centre (sDiv) of the German Centre for Integrative Biodiversity Research (iDiv), Halle-Jena-Leipzig, Deutscher Platz 5e, Leipzig, Germany
- Leibniz Institute of Freshwater Ecology and Inland Fisheries (IGB), Müggelseedamm 310, 12587, Berlin, Germany
| | - Jeffrey D Muehlbauer
- US Geological Survey, Southwest Biological Science Center, Grand Canyon Monitoring and Research Center, 2255 N. Gemini Dr., Flagstaff, AZ, 86001, USA
| | - Eugenia Marti
- Biogeodynamics and Biodiversity Group, Centre for Advanced Studies of Blanes (CEAB-CSIC), Carrer Accés Cala Sant Francesc, 14, 17300 Blanes, Girona, Spain
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12
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Haines ML, Melville J, Sumner J, Clemann N, Chapple DG, Stuart-Fox D. Geographic variation in hybridization and ecological differentiation between three syntopic, morphologically similar species of montane lizards. Mol Ecol 2016; 25:2887-903. [DOI: 10.1111/mec.13652] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2015] [Revised: 03/28/2016] [Accepted: 04/12/2016] [Indexed: 11/28/2022]
Affiliation(s)
- M. L. Haines
- Sciences Department; Museum Victoria; GPO Box 666 Melbourne Vic. 3001 Australia
- Biosciences; University of Melbourne; Parkville Vic. 3010 Australia
| | - J. Melville
- Sciences Department; Museum Victoria; GPO Box 666 Melbourne Vic. 3001 Australia
| | - J. Sumner
- Sciences Department; Museum Victoria; GPO Box 666 Melbourne Vic. 3001 Australia
| | - N. Clemann
- Sciences Department; Museum Victoria; GPO Box 666 Melbourne Vic. 3001 Australia
- Arthur Rylah Institute for Environmental Research; Department of Environment; Land, Water, and Planning; PO Box 137 Heidelberg Vic. 3084 Australia
| | - D. G. Chapple
- School of Biological Sciences; Monash University; Clayton Vic. 3800 Australia
| | - D. Stuart-Fox
- Biosciences; University of Melbourne; Parkville Vic. 3010 Australia
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13
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Wayne RK, Shaffer HB. Hybridization and endangered species protection in the molecular era. Mol Ecol 2016; 25:2680-9. [DOI: 10.1111/mec.13642] [Citation(s) in RCA: 100] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2016] [Revised: 04/03/2016] [Accepted: 04/08/2016] [Indexed: 01/05/2023]
Affiliation(s)
- Robert K. Wayne
- Department of Ecology and Evolutionary Biology 610 Charles E. Young Dr. South University of California Los Angeles CA 90095 USA
| | - H. Bradley Shaffer
- Department of Ecology and Evolutionary Biology 610 Charles E. Young Dr. South University of California Los Angeles CA 90095 USA
- La Kretz Center for California Conservation Science Institute of the Environment and Sustainability 619 Charles E. Young Dr. South University of California Los Angeles CA 90095 USA
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Searcy CA, Shaffer HB. Do Ecological Niche Models Accurately Identify Climatic Determinants of Species Ranges? Am Nat 2016; 187:423-35. [DOI: 10.1086/685387] [Citation(s) in RCA: 71] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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15
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Shaffer HB, Gidiş M, McCartney-Melstad E, Neal KM, Oyamaguchi HM, Tellez M, Toffelmier EM. Conservation genetics and genomics of amphibians and reptiles. Annu Rev Anim Biosci 2015; 3:113-38. [PMID: 25580719 DOI: 10.1146/annurev-animal-022114-110920] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Amphibians and reptiles as a group are often secretive, reach their greatest diversity often in remote tropical regions, and contain some of the most endangered groups of organisms on earth. Particularly in the past decade, genetics and genomics have been instrumental in the conservation biology of these cryptic vertebrates, enabling work ranging from the identification of populations subject to trade and exploitation, to the identification of cryptic lineages harboring critical genetic variation, to the analysis of genes controlling key life history traits. In this review, we highlight some of the most important ways that genetic analyses have brought new insights to the conservation of amphibians and reptiles. Although genomics has only recently emerged as part of this conservation tool kit, several large-scale data sources, including full genomes, expressed sequence tags, and transcriptomes, are providing new opportunities to identify key genes, quantify landscape effects, and manage captive breeding stocks of at-risk species.
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Johnson JB, Macedo DC, Passow CN, Rosenthal GG. Sexual ornaments, body morphology, and swimming performance in naturally hybridizing swordtails (teleostei: xiphophorus). PLoS One 2014; 9:e109025. [PMID: 25329558 PMCID: PMC4198091 DOI: 10.1371/journal.pone.0109025] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2014] [Accepted: 08/28/2014] [Indexed: 11/19/2022] Open
Abstract
Determining the costs of sexual ornaments is complicated by the fact that ornaments are often integrated with other, non-sexual traits, making it difficult to dissect the effect of ornaments independent of other aspects of the phenotype. Hybridization can produce reduced phenotypic integration, allowing one to evaluate performance across a broad range of multivariate trait values. Here we assess the relationship between morphology and performance in the swordtails Xiphophorus malinche and X. birchmanni, two naturally-hybridizing fish species that differ extensively in non-sexual as well as sexual traits. We took advantage of novel trait variation in hybrids to determine if sexual ornaments incur a cost in terms of locomotor ability. For both fast-start and endurance swimming, hybrids performed at least as well as the two parental species. The sexually-dimorphic sword did not impair swimming performance per se. Rather, the sword negatively affected performance only when paired with a sub-optimal body shape. Studies seeking to quantify the costs of ornaments should consider that covariance with non-sexual traits may create the spurious appearance of costs.
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Affiliation(s)
- James B. Johnson
- Department of Biology, Texas A&M University, College Station, Texas, United States of America
- Centro de Investigaciones Científicas de las Huastecas, Colonia Aguazarca, Calnali, Hidalgo, México
| | - Danielle C. Macedo
- Department of Biology, Texas A&M University, College Station, Texas, United States of America
| | - Courtney N. Passow
- Department of Biology, Texas A&M University, College Station, Texas, United States of America
| | - Gil G. Rosenthal
- Department of Biology, Texas A&M University, College Station, Texas, United States of America
- Centro de Investigaciones Científicas de las Huastecas, Colonia Aguazarca, Calnali, Hidalgo, México
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Chunco AJ. Hybridization in a warmer world. Ecol Evol 2014; 4:2019-31. [PMID: 24963394 PMCID: PMC4063493 DOI: 10.1002/ece3.1052] [Citation(s) in RCA: 109] [Impact Index Per Article: 10.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2013] [Revised: 03/01/2014] [Accepted: 03/11/2014] [Indexed: 01/09/2023] Open
Abstract
Climate change is profoundly affecting the evolutionary trajectory of individual species and ecological communities, in part through the creation of novel species assemblages. How climate change will influence competitive interactions has been an active area of research. Far less attention, however, has been given to altered reproductive interactions. Yet, reproductive interactions between formerly isolated species are inevitable as populations shift geographically and temporally as a result of climate change, potentially resulting in introgression, speciation, or even extinction. The susceptibility of hybridization rates to anthropogenic disturbance was first recognized in the 1930s. To date, work on anthropogenically mediated hybridization has focused primarily on either physical habitat disturbance or species invasion. Here, I review recent literature on hybridization to identify how ecological responses to climate change will increase the likelihood of hybridization via the dissolution of species barriers maintained by habitat, time, or behavior. Using this literature, I identify several cases where novel hybrid zones have recently formed, likely as a result of changing climate. Future research should focus on identifying areas and taxonomic groups where reproductive species interactions are most likely to be influenced by climate change. Furthermore, a better understanding of the evolutionary consequences of climate-mediated secondary contact is urgently needed. Paradoxically, hybridization is both a major conservation concern and an important source of novel genetic and phenotypic variation. Hybridization may therefore both contribute to increasing rates of extinction and stimulate the creation of novel phenotypes that will speed adaptation to novel climates. Predicting which result will occur following secondary contact will be an important contribution to conservation for many species.
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Affiliation(s)
- Amanda J Chunco
- Department of Environmental Studies, Elon University CB 2015, Elon, North Carolina 27244
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Hillman SS, Drewes RC, Hedrick MS, Hancock TV. Physiological Vagility: Correlations with Dispersal and Population Genetic Structure of Amphibians. Physiol Biochem Zool 2014; 87:105-12. [DOI: 10.1086/671109] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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19
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Genetic diversity and structure of an endemic and critically endangered stream river salamander (Caudata: Ambystoma leorae) in Mexico. CONSERV GENET 2013. [DOI: 10.1007/s10592-013-0520-9] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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20
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Johnson JR, Ryan ME, Micheletti SJ, Shaffer HB. Short pond hydroperiod decreases fitness of nonnative hybrid salamanders in California. Anim Conserv 2013. [DOI: 10.1111/acv.12029] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- J. R. Johnson
- Department of Biology; Western Kentucky University; Bowling Green KY USA
| | - M. E. Ryan
- Department of Civil and Environmental Engineering; University of Washington; Seattle WA USA
| | - S. J. Micheletti
- School of Biological Sciences; Washington State University; Pullman WA USA
| | - H. B. Shaffer
- Department of Ecology and Evolutionary Biology; University of California; Los Angeles CA USA
- La Kretz Center for California Conservation Science; Institute of the Environment and Sustainability; University of California; Los Angeles CA USA
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