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Marchetti JR, French SS, Virgin EE, Lewis EL, Ki KC, Sermersheim LO, Brusch GA, Beard KH. Invading nonnative frogs use different microhabitats and change physiology along an elevation gradient. JOURNAL OF EXPERIMENTAL ZOOLOGY. PART A, ECOLOGICAL AND INTEGRATIVE PHYSIOLOGY 2024; 341:73-85. [PMID: 37902261 DOI: 10.1002/jez.2762] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/07/2023] [Revised: 09/13/2023] [Accepted: 10/11/2023] [Indexed: 10/31/2023]
Abstract
The coqui frog (Eleutherodactylus coqui) was introduced to the island of Hawai'i in the 1980s, and has spread across much of the island. There is concern they will invade higher elevation areas where negative impacts on native species are expected. It is not known if coqui change behavior and baseline physiology in ways that allow them to invade higher elevations. We investigated where coqui are found across the island and whether that includes recent invasion into higher elevations. We also investigated whether elevation is related to coqui's microhabitat use, including substrate use and height off the forest floor, and physiological metrics, including plasma osmolality, oxidative status, glucose, free glycerol, and triglycerides, that might be associated with invading higher elevations. We found coqui have increased the area they occupy along roads from 31% to 50% and have moved into more high-elevation locations (16% vs. 1%) compared to where they were found 14 years ago. We also found frogs at high elevation on different substrates and closer to the forest floor than frogs at lower elevations-perhaps in response to air temperatures which tended to be warmer close to the forest floor. We observed that blood glucose and triglycerides increase in frogs with elevation. An increase in glucose is likely an acclimation response to cold temperatures while triglycerides may also help frogs cope with the energetic demands of suboptimal temperatures. Finally, we found that female coqui have higher plasma osmolality, reactive oxygen metabolites (dROMs), free glycerol, and triglycerides than males. Our study suggests coqui behavior and physiology in Hawai'i may be influenced by elevation in ways that allow them to cope with lower temperatures and invade higher elevations.
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Affiliation(s)
- Jack R Marchetti
- Department of Biology and the Ecology Center, Utah State University, Logan, Utah, USA
| | - Susannah S French
- Department of Biology and the Ecology Center, Utah State University, Logan, Utah, USA
| | - Emily E Virgin
- Department of Biology and the Ecology Center, Utah State University, Logan, Utah, USA
| | - Erin L Lewis
- Department of Biology and the Ecology Center, Utah State University, Logan, Utah, USA
| | - Kwanho C Ki
- Department of Biology and the Ecology Center, Utah State University, Logan, Utah, USA
| | - Layne O Sermersheim
- Department of Biology and the Ecology Center, Utah State University, Logan, Utah, USA
| | - George A Brusch
- Biological Sciences, California State University San Marcos, San Marcos, California, USA
| | - Karen H Beard
- Department of Wildland Resources, Utah State University, Logan, Utah, USA
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2
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Marchetti JR, Beard KH, Virgin EE, Lewis EL, Hess SC, Ki KC, Sermersheim LO, Furtado AP, French SS. Invasive frogs show persistent physiological differences to elevation and acclimate to colder temperatures. J Therm Biol 2023; 114:103590. [PMID: 37267784 DOI: 10.1016/j.jtherbio.2023.103590] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2023] [Revised: 05/03/2023] [Accepted: 05/05/2023] [Indexed: 06/04/2023]
Abstract
The coqui frog (Eleutherodactylus coqui) was introduced to the island of Hawai'i in the 1980s and has spread across much of the island. Concern remains that this frog will continue to expand its range and invade higher elevation habitats where much of the island's endemic species are found. We determined whether coqui thermal tolerance and physiology change along Hawai'i's elevational gradients. We measured physiological responses using a short-term experiment to determine baseline tolerance and physiology by elevation, and a long-term experiment to determine the coqui's ability to acclimate to different temperatures. We collected frogs from low, medium, and high elevations. After both the short and long-term experiments, we measured critical thermal minimum (CTmin), blood glucose, oxidative stress, and corticosterone levels. CTmin was lower in high elevation frogs than low elevation frogs after the short acclimation experiment, signifying that they acclimate to local conditions. After the extended acclimation, CTmin was lower in frogs acclimated to cold temperatures compared to warm-acclimated frogs and no longer varied by elevation. Blood glucose levels were positively correlated with elevation even after the extended acclimation, suggesting glucose may also be related to lower temperatures. Oxidative stress was higher in females than males, and corticosterone was not significantly related to any predictor variables. The extended acclimation experiment showed that coquis can adjust their thermal tolerance to different temperatures over a 3-week period, suggesting the expansion of coqui into higher elevation habitats may still be possible, and they may not be as restricted by cold temperatures as previously thought.
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Affiliation(s)
- Jack R Marchetti
- Department of Biology and the Ecology Center, Utah State University, Logan, UT, 84322, USA
| | - Karen H Beard
- Department of Wildland Resources, Utah State University, Logan, UT, 84322, USA.
| | - Emily E Virgin
- Department of Biology and the Ecology Center, Utah State University, Logan, UT, 84322, USA
| | - Erin L Lewis
- Department of Biology and the Ecology Center, Utah State University, Logan, UT, 84322, USA
| | - Steven C Hess
- USDA APHIS-WS National Wildlife Research Center, Hawaii Field Station, Hilo, HI, 96720, USA
| | - Kwanho C Ki
- Department of Biology and the Ecology Center, Utah State University, Logan, UT, 84322, USA
| | - Layne O Sermersheim
- Department of Biology and the Ecology Center, Utah State University, Logan, UT, 84322, USA
| | - Adriana P Furtado
- Departamento de Ciências Animais, Universidade de Brasília, Distrito Federal, 70910900, Brazil
| | - Susannah S French
- Department of Biology and the Ecology Center, Utah State University, Logan, UT, 84322, USA
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3
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Zhang S, Lin M, Liu J, Chen J, Liu D, Zhao J, Yao M. A centenary tale: population genetic insights into the introduction history of the oriental fire-bellied toad (Bombina orientalis) in Beijing. BMC Ecol Evol 2022; 22:117. [PMID: 36241967 PMCID: PMC9569074 DOI: 10.1186/s12862-022-02072-z] [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: 06/01/2022] [Accepted: 09/02/2022] [Indexed: 11/06/2022] Open
Abstract
Background The successful establishment of a species population following a single introduction of a few individuals to a non-native area has been limited. Nevertheless, the oriental fire-bellied toad (Bombina orientalis) population in Beijing is purportedly descended from a single introduction of about 200 individuals translocated from Yantai, Shandong Province, China, in 1927. Results To resolve the introduction process and to understand the genetic consequences since that introduction approximately 90 years ago, we investigated the population’s genetic diversity and structure using 261 toads from Beijing and two native Shandong populations and inferred the species’ introduction history using simulation-based approaches. Analysis of mitochondrial DNA (mtDNA) sequences showed the two haplotypes found in Beijing nested within Yantai haplotypes, thus corroborating the historical record of the translocation source. The mtDNA and 11 nuclear microsatellite markers revealed both considerably lower genetic diversity in Beijing than in the source population and strong genetic differentiation between them. Although the current census population in Beijing may be in the range of a few thousand, the effective population size was estimated at only 20–57. Simulations also suggest that this population may have descended from 40–60 founders. Conclusions The Beijing population’s genetic patterns were consistent with the consequences of a severe bottleneck during introduction followed by genetic drift. The introduction trajectory constructed for this B. orientalis population reveals the genetic footprints of a small population sustained in isolation for nearly a century. Our results provide an intriguing example of establishment success from limited founders and may inform ex situ conservation efforts as well as the management of biological invasions. Supplementary Information The online version contains supplementary material available at 10.1186/s12862-022-02072-z.
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Affiliation(s)
- Shan Zhang
- grid.11135.370000 0001 2256 9319School of Life Sciences, Peking University, R312, School of Life Sciences Bldg., 100871 Beijing, China ,grid.11135.370000 0001 2256 9319Institute of Ecology, College of Urban and Environmental Sciences, Peking University, Beijing, 100871 China
| | - Meixi Lin
- grid.11135.370000 0001 2256 9319School of Life Sciences, Peking University, R312, School of Life Sciences Bldg., 100871 Beijing, China ,grid.19006.3e0000 0000 9632 6718Department of Ecology and Evolutionary Biology, University of California-Los Angeles, Los Angeles, CA 90095 USA
| | - Jiawei Liu
- grid.11135.370000 0001 2256 9319School of Life Sciences, Peking University, R312, School of Life Sciences Bldg., 100871 Beijing, China ,grid.170205.10000 0004 1936 7822Department of Ecology and Evolution, University of Chicago, Chicago, IL 60637 USA
| | - Jiangce Chen
- grid.63054.340000 0001 0860 4915Mechanical Engineering Department, University of Connecticut, Storrs, CT 06269 USA
| | - Dong Liu
- grid.263817.90000 0004 1773 1790Department of Biology, School of Life Sciences, Southern University of Science and Technology, Shenzhen, 518055 China
| | - Jindong Zhao
- grid.11135.370000 0001 2256 9319School of Life Sciences, Peking University, R312, School of Life Sciences Bldg., 100871 Beijing, China ,grid.11135.370000 0001 2256 9319Institute of Ecology, College of Urban and Environmental Sciences, Peking University, Beijing, 100871 China
| | - Meng Yao
- grid.11135.370000 0001 2256 9319School of Life Sciences, Peking University, R312, School of Life Sciences Bldg., 100871 Beijing, China ,grid.11135.370000 0001 2256 9319Institute of Ecology, College of Urban and Environmental Sciences, Peking University, Beijing, 100871 China
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4
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Genetic structure of American bullfrog populations in Brazil. Sci Rep 2022; 12:9927. [PMID: 35705600 PMCID: PMC9200760 DOI: 10.1038/s41598-022-13870-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2022] [Accepted: 05/30/2022] [Indexed: 11/15/2022] Open
Abstract
Non-native species are a major problem affecting numerous biomes around the globe. Information on their population genetics is crucial for understanding their invasion history and dynamics. We evaluated the population structure of the non-native American bullfrog, Aquarana catesbeiana, in Brazil on the basis of 324 samples collected from feral and captive groups at 38 sites in seven of the nine states where feral populations occur. We genotyped all samples using previously developed, highly polymorphic microsatellite loci and performed a discriminant analysis of principal components together with Jost’s D index to quantify pairwise differentiation between populations. We then amplified 1,047 base pairs of the mitochondrial cytochrome b (cytb) gene from the most divergent samples from each genetic population and calculated their pairwise differences. Both the microsatellite and cytb data indicated that bullfrogs comprise two populations. Population grouping 1 is widespread and possesses two cytb haplotypes. Population grouping 2 is restricted to only one state and possesses only one of the haplotypes from Population grouping 1. We show that there were two imports of bullfrogs to Brazil and that there is low genetic exchange between population groupings. Also, we find that there is no genetic divergence among feral and captive populations suggesting continuous releases. The limited genetic variability present in the country is associated to the small number of introductions and founders. Feral bullfrogs are highly associated to leaks from farms, and control measures should focus on preventing escapes using other resources than genetics, as feral and captive populations do not differ.
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5
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Sendell-Price AT, Ruegg KC, Robertson BC, Clegg SM. An island-hopping bird reveals how founder events shape genome-wide divergence. Mol Ecol 2021; 30:2495-2510. [PMID: 33826187 DOI: 10.1111/mec.15898] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2021] [Revised: 03/09/2021] [Accepted: 03/18/2021] [Indexed: 12/16/2022]
Abstract
When populations colonize new areas, both strong selection and strong drift can be experienced due to novel environments and small founding populations, respectively. Empirical studies have predominantly focused on the phenotype when assessing the role of selection, and limited neutral-loci when assessing founder-induced loss of diversity. Consequently, the extent to which processes interact to influence evolutionary trajectories is difficult to assess. Genomic-level approaches provide the opportunity to simultaneously consider these processes. Here, we examine the roles of selection and drift in shaping genomic diversity and divergence in historically documented sequential island colonizations by the silvereye (Zosterops lateralis). We provide the first empirical demonstration of the rapid appearance of highly diverged genomic regions following population founding, the position of which are highly idiosyncratic. As these regions rarely contained loci putatively under selection, it is most likely that these differences arise via the stochastic nature of the founding process. However, selection is required to explain rapid evolution of larger body size in insular silvereyes. Reconciling our genomic data with these phenotypic patterns suggests there may be many genomic routes to the island phenotype, which vary across populations. Finally, we show that accelerated divergence associated with multiple founding steps is the product of genome-wide rather than localized differences, and that diversity erodes due to loss of rare alleles. However, even multiple founder events do not result in divergence and diversity levels seen in evolutionary older subspecies, and therefore do not provide a shortcut to speciation as proposed by founder-effect speciation models.
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Affiliation(s)
- Ashley T Sendell-Price
- Edward Grey Institute of Field Ornithology, Department of Zoology, University of Oxford, Oxford, UK
| | - Kristen C Ruegg
- Edward Grey Institute of Field Ornithology, Department of Zoology, University of Oxford, Oxford, UK.,Department of Biology, Colorado State University, Fort Collins, CO, USA
| | | | - Sonya M Clegg
- Edward Grey Institute of Field Ornithology, Department of Zoology, University of Oxford, Oxford, UK.,Environmental Futures Research Institute, Griffith University, Nathan, Qld, Australia
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6
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Inferring the invasion mechanisms of the red swamp crayfish in China using mitochondrial DNA sequences. AQUACULTURE AND FISHERIES 2021. [DOI: 10.1016/j.aaf.2020.04.003] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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7
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Pabijan M, Palomar G, Antunes B, Antoł W, Zieliński P, Babik W. Evolutionary principles guiding amphibian conservation. Evol Appl 2020; 13:857-878. [PMID: 32431739 PMCID: PMC7232768 DOI: 10.1111/eva.12940] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2019] [Revised: 02/05/2020] [Accepted: 02/18/2020] [Indexed: 12/18/2022] Open
Abstract
The Anthropocene has witnessed catastrophic amphibian declines across the globe. A multitude of new, primarily human-induced drivers of decline may lead to extinction, but can also push species onto novel evolutionary trajectories. If these are recognized by amphibian biologists, they can be engaged in conservation actions. Here, we summarize how principles stemming from evolutionary concepts have been applied for conservation purposes, and address emerging ideas at the vanguard of amphibian conservation science. In particular, we examine the consequences of increased drift and inbreeding in small populations and their implications for practical conservation. We then review studies of connectivity between populations at the landscape level, which have emphasized the limiting influence of anthropogenic structures and degraded habitat on genetic cohesion. The rapid pace of environmental changes leads to the central question of whether amphibian populations can cope either by adapting to new conditions or by shifting their ranges. We gloomily conclude that extinction seems far more likely than adaptation or range shifts for most species. That said, conservation strategies employing evolutionary principles, such as selective breeding, introduction of adaptive variants through translocations, ecosystem interventions aimed at decreasing phenotype-environment mismatch, or genetic engineering, may effectively counter amphibian decline in some areas or for some species. The spread of invasive species and infectious diseases has often had disastrous consequences, but has also provided some premier examples of rapid evolution with conservation implications. Much can be done in terms of setting aside valuable amphibian habitat that should encompass both natural and agricultural areas, as well as designing protected areas to maximize the phylogenetic and functional diversity of the amphibian community. We conclude that an explicit consideration and application of evolutionary principles, although certainly not a silver bullet, should increase effectiveness of amphibian conservation in both the short and long term.
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Affiliation(s)
- Maciej Pabijan
- Institute of Zoology and Biomedical ResearchFaculty of BiologyJagiellonian UniversityKrakówPoland
| | - Gemma Palomar
- Institute of Environmental SciencesFaculty of BiologyJagiellonian UniversityKrakówPoland
| | - Bernardo Antunes
- Institute of Environmental SciencesFaculty of BiologyJagiellonian UniversityKrakówPoland
| | - Weronika Antoł
- Institute of Environmental SciencesFaculty of BiologyJagiellonian UniversityKrakówPoland
| | - Piotr Zieliński
- Institute of Environmental SciencesFaculty of BiologyJagiellonian UniversityKrakówPoland
| | - Wiesław Babik
- Institute of Environmental SciencesFaculty of BiologyJagiellonian UniversityKrakówPoland
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8
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Wang S, Liu C, Wu J, Xu C, Zhang J, Bai C, Gao X, Liu X, Li X, Zhu W, Li Y. Propagule pressure and hunting pressure jointly determine genetic evolution in insular populations of a global frog invader. Sci Rep 2019; 9:448. [PMID: 30679623 PMCID: PMC6345768 DOI: 10.1038/s41598-018-37007-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2018] [Accepted: 11/26/2018] [Indexed: 12/24/2022] Open
Abstract
Islands are often considered to be more susceptible to biological invasions and to suffer greater impacts from invaders than mainland areas, and this difference is generally attributed to differences in species introductions, ecological factors or human activities between islands and mainland areas. Genetic variation, as a good estimate of evolutionary potential, can influence the invasion process and impacts of alien species. However, few studies have compared the genetic diversity of alien species between islands and a corresponding mainland. Here, we examined the genetic variation and differentiation in feral populations (30 sampled individuals/population) of a globally invasive species (the American bullfrog, Lithobates catesbeianus) that was extensively farmed on 14 islands in the Zhoushan Archipelago of China and in three nearby regions on the mainland. We quantified the relative importance of propagule pressure and hunting pressures on the genetic variation of bullfrog populations and found that insular populations have greater genetic variation than their mainland counterparts. Although genetic differentiation between the populations was observed, no evidence of recent bottlenecks or population expansion in any of the tested population was found. Our results suggest that the propagule pressures of bullfrogs escaping from farms, multiple releases and hunting pressure influence the genetic variation among bullfrog populations. These results might have important implications for understanding the establishment and evolution of alien species on islands and for the management of invasive species.
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Affiliation(s)
- Supen Wang
- CAS Key Laboratory of Animal Ecology and Conservation Biology, Institute of Zoology, 1 Beichen West Road, Chaoyang District, Beijing, 100101, China
| | - Conghui Liu
- CAS Key Laboratory of Animal Ecology and Conservation Biology, Institute of Zoology, 1 Beichen West Road, Chaoyang District, Beijing, 100101, China.,University of Chinese Academy of Sciences, 19 Yuquan Road, Shijingshan, Beijing, 100049, China
| | - Jun Wu
- Nanjing Institute of Environmental Sciences under Ministry of Environmental Protection of China, No. 8 Jiang Wang Miao Street, Nanjing, 210042, PR China
| | - Chunxia Xu
- CAS Key Laboratory of Animal Ecology and Conservation Biology, Institute of Zoology, 1 Beichen West Road, Chaoyang District, Beijing, 100101, China.,University of Chinese Academy of Sciences, 19 Yuquan Road, Shijingshan, Beijing, 100049, China
| | - Jiaqi Zhang
- CAS Key Laboratory of Animal Ecology and Conservation Biology, Institute of Zoology, 1 Beichen West Road, Chaoyang District, Beijing, 100101, China.,University of Chinese Academy of Sciences, 19 Yuquan Road, Shijingshan, Beijing, 100049, China
| | - Changming Bai
- Key Laboratory of Sustainable Development of Marine Fisheries, Ministry of Agriculture, Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Qingdao, 266071, China
| | - Xu Gao
- CAS Key Laboratory of Animal Ecology and Conservation Biology, Institute of Zoology, 1 Beichen West Road, Chaoyang District, Beijing, 100101, China.,University of Chinese Academy of Sciences, 19 Yuquan Road, Shijingshan, Beijing, 100049, China
| | - Xuan Liu
- CAS Key Laboratory of Animal Ecology and Conservation Biology, Institute of Zoology, 1 Beichen West Road, Chaoyang District, Beijing, 100101, China
| | - Xianping Li
- College of Resources and Environmental Science, Nanjing Agricultural University, Nanjing, 210095, China
| | - Wei Zhu
- CAS Key Laboratory of Animal Ecology and Conservation Biology, Institute of Zoology, 1 Beichen West Road, Chaoyang District, Beijing, 100101, China.,University of Chinese Academy of Sciences, 19 Yuquan Road, Shijingshan, Beijing, 100049, China
| | - Yiming Li
- CAS Key Laboratory of Animal Ecology and Conservation Biology, Institute of Zoology, 1 Beichen West Road, Chaoyang District, Beijing, 100101, China. .,University of Chinese Academy of Sciences, 19 Yuquan Road, Shijingshan, Beijing, 100049, China.
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9
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O'Neill EM, Beard KH, Fox CW. Body Size and Life History Traits in Native and Introduced Populations of Coqui Frogs. COPEIA 2018. [DOI: 10.1643/ce-17-642] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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10
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Foote I, Godfrey SS, Robertson BC. Mate choice explains high genetic diversity in a small founding population of the New Zealand sea lion (Phocarctos hookeri). AUST J ZOOL 2018. [DOI: 10.1071/zo19023] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Founder populations are susceptible to reduced genetic diversity, which can hinder successful population establishment. A new genetic lineage of the New Zealand sea lion (Phocarctos hookeri) has recently colonised the historical range of the New Zealand mainland (Otago Peninsula). Despite a small founding population, previous research indicated that nuclear genetic diversity in the Otago Peninsula population is similar to that of the larger source population (Sandy Bay, Auckland Islands). Our research aimed to identify whether mechanisms of female mate choice could help to explain the unexpectedly high level of genetic diversity in the founder population. We used genetic data at 12 microsatellite loci for mother–pup pairs from both populations, and the software COLONY to identify putative paternal genotypes inferred from allele sharing between known mother–pup pairs. We found that mating pairs were, on average, more related at the Otago Peninsula location. However, Sandy Bay females were mating with males more related to themselves than expected by chance, while the Otago Peninsula females were not. These findings suggest that female choice in this otariid species appears important, although may be constrained in some situations. Our findings also help to explain how the recently founded population is able to maintain a viable, growing population.
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11
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Barker BS, Rodríguez-Robles JA. ORIGINS AND GENETIC DIVERSITY OF INTRODUCED POPULATIONS OF THE PUERTO RICAN RED-EYED COQUÍ, ELEUTHERODACTYLUS ANTILLENSIS, IN SAINT CROIX (U.S. VIRGIN ISLANDS) AND PANAMÁ. COPEIA 2017. [PMID: 28649148 DOI: 10.1643/cg-16-501] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
The Red-eyed Coquí, Eleutherodactylus antillensis, is a terrestrial frog endemic to the Puerto Rican Bank (Puerto Rico and numerous islands and cays off its eastern coast), in the eastern Caribbean Sea. The species was likely introduced in Saint Croix, an island c. 100 km southeast of Puerto Rico, in the late 1930s, and in Panamá City, Panamá, in the late 1950s or early 1960s, but the source(s) of these introductions are unknown. We analyzed sequence data from one mtDNA locus and four nuDNA introns to infer the origin(s) of the Saint Croix and Panamá City populations and quantify their genetic diversity. Saint Croix and Panamanian populations do not share any haplotypes, and they cluster with different native populations, suggesting that they are derived from separate sources in the Puerto Rican Bank. Patterns of population structure trace the probable sources of E. antillensis in Saint Croix to islands off Puerto Rico's eastern coast, which include Vieques, Culebra, Saint Thomas, Saint John, Tortola, and Virgin Gorda, and possibly to eastern Puerto Rico as well. In contrast, Panamá City E. antillensis probably originated from either western or eastern Puerto Rico. Genetic diversity in the introduced populations is similar to or lower than in populations in the species' native range, indicating that genetic diversity has not increased in the alien frogs. Our findings may facilitate the development of preventive measures to minimize introductions of non-native amphibians in the Caribbean and Central America.
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Affiliation(s)
- Brittany S Barker
- Department of Ecology and Evolutionary Biology, University of Arizona, BioSciences West room 310, 1041 E. Lowell St., Tucson, Arizona 85721.,Department of Biology, University of New Mexico, 167 Castetter Hall, 1 University of New Mexico, Albuquerque, New Mexico 87131-0001
| | - Javier A Rodríguez-Robles
- School of Life Sciences, University of Nevada, Las Vegas, 4505 Maryland Parkway, Las Vegas, Nevada 89154-4004
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12
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Dawson NG, Colella JP, Small MP, Stone KD, Talbot SL, Cook JA. Historical biogeography sets the foundation for contemporary conservation of martens (genus Martes) in northwestern North America. J Mammal 2017. [DOI: 10.1093/jmammal/gyx047] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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13
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Richardson MF, Sherman CDH, Lee RS, Bott NJ, Hirst AJ. Multiple dispersal vectors drive range expansion in an invasive marine species. Mol Ecol 2016; 25:5001-5014. [PMID: 27552100 DOI: 10.1111/mec.13817] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2016] [Revised: 08/05/2016] [Accepted: 08/11/2016] [Indexed: 12/13/2022]
Abstract
The establishment and subsequent spread of invasive species is widely recognized as one of the most threatening processes contributing to global biodiversity loss. This is especially true for marine and estuarine ecosystems, which have experienced significant increases in the number of invasive species with the increase in global maritime trade. Understanding the rate and mechanisms of range expansion is therefore of significant interest to ecologists and conservation managers alike. Using a combination of population genetic surveys, environmental DNA (eDNA) plankton sampling and hydrodynamic modelling, we examined the patterns of introduction of the predatory Northern Pacific seastar (Asterias amurensis) and pathways of secondary spread within southeast Australia. Genetic surveys across the invasive range reveal some genetic divergence between the two main invasive regions and no evidence of ongoing gene flow, a pattern that is consistent with the establishment of the second invasive region via a human-mediated translocation event. In contrast, hydrodynamic modelling combined with eDNA plankton sampling demonstrated that the establishment of range expansion populations within a region is consistent with natural larval dispersal and recruitment. Our results suggest that both anthropogenic and natural dispersal vectors have played an important role in the range expansion of this species in Australia. The multiple modes of spread combined with high levels of fecundity and a long larval duration in A. amurensis suggests it is likely to continue its range expansion and significantly impact Australian marine ecosystems.
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Affiliation(s)
- Mark F Richardson
- Bioinformatics Core Research Group, Deakin University, 75 Pigdons Road, Locked Bag 20000, Geelong, Vic., 3220, Australia. .,School of Life and Environmental Sciences, Centre for Integrative Ecology, Deakin University, Waurn Ponds Campus, 75 Pigdons Road, Locked Bag 20000, Geelong, Vic., 3220, Australia.
| | - Craig D H Sherman
- School of Life and Environmental Sciences, Centre for Integrative Ecology, Deakin University, Waurn Ponds Campus, 75 Pigdons Road, Locked Bag 20000, Geelong, Vic., 3220, Australia
| | - Randall S Lee
- Applied Sciences Group, Environmental Protection Authority, Vic., 3085, Australia
| | - Nathan J Bott
- School of Science and Centre for Environmental Sustainability and Remediation, RMIT University, PO Box 71, Bundoora, Vic., 3083, Australia
| | - Alastair J Hirst
- School of Life and Environmental Sciences, Centre for Integrative Ecology, Deakin University, Waurn Ponds Campus, 75 Pigdons Road, Locked Bag 20000, Geelong, Vic., 3220, Australia
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14
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Plenderleith TL, Smith KL, Donnellan SC, Reina RD, Chapple DG. Human-assisted invasions of pacific islands by litoria frogs: a case study of the bleating tree frog on Lord Howe Island. PLoS One 2015; 10:e0126287. [PMID: 25962141 PMCID: PMC4427294 DOI: 10.1371/journal.pone.0126287] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2015] [Accepted: 03/31/2015] [Indexed: 11/18/2022] Open
Abstract
There are substantial differences among taxonomic groups in their capacity to reach remote oceanic islands via long-distance overwater dispersal from mainland regions. Due to their permeable skin and intolerance of saltwater, amphibians generally require human-assisted dispersal to reach oceanic islands. Several Litoria frog species have been introduced to remote islands throughout the Pacific Ocean region. Lord Howe Island (LHI) is an oceanic island that lies approximately 600 km east of the Australian mainland and has a diverse, endemic biota. The bleating tree frog (Litoria dentata) is native to mainland eastern Australia, but was accidentally introduced to LHI in the 1990s, yet its ecology and potential impact on LHI has remained unstudied. We used a mitochondrial phylogeographical approach to determine that L. dentata was introduced from the Ballina region in northeastern New South Wales. The founding population was likely accidentally introduced with cargo shipped from the mainland. We also completed the first detailed investigation of the distribution, ecology and habitat use of L. dentata on LHI. The species is widespread on LHI and is prevalent in human habitat, cattle pasture and undisturbed forest. We discuss the potential impact of introduced Litoria species on Pacific islands and outline what biosecurity protocols could be implemented to prevent the introduction of further amphibian species to the ecologically sensitive oceanic area.
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Affiliation(s)
| | - Katie L. Smith
- School of Biological Sciences, Monash University, Clayton, Victoria, Australia
- Museum Victoria, Division of Sciences, Melbourne, Victoria, Australia
| | | | - Richard D. Reina
- School of Biological Sciences, Monash University, Clayton, Victoria, Australia
| | - David G. Chapple
- School of Biological Sciences, Monash University, Clayton, Victoria, Australia
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15
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An evaluation of the genetic structure and post-introduction dispersal of a non-native invasive fish to the North Island of New Zealand. Biol Invasions 2014. [DOI: 10.1007/s10530-014-0753-7] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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16
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Konečný A, Estoup A, Duplantier JM, Bryja J, Bâ K, Galan M, Tatard C, Cosson JF. Invasion genetics of the introduced black rat (Rattus rattus) in Senegal, West Africa. Mol Ecol 2012. [PMID: 23206272 DOI: 10.1111/mec.12112] [Citation(s) in RCA: 57] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
An understanding of the evolutionary history and dynamics of invasive species is required for the construction of predictive models of future spread and the design of biological management measures. The black rat (Rattus rattus) is a major vertebrate invader with a worldwide distribution. Despite the severe ecological, economic and health impacts of this species, its evolutionary history has been little studied. We carried out extensive specimen sampling in Senegal, West Africa, and used microsatellite markers to describe the pattern and processes of invasion in this large continental area. The genetic data obtained were combined with historical knowledge concerning the presence of this species in Senegal. Data were analysed by a combination of Bayesian clustering and approximate Bayesian computation methods. The invasion pathways closely paralleled the history of human trade routes in Senegal. In several places, we detected the occurrence of multiple introductions from genetically different sources. Long-distance migration between towns and villages was also observed. Our findings suggest that genetic bottlenecks and admixture have played a major role in shaping the genetics of invasive black rats. These two processes may generate genetic novelty and favour rapid evolution along the invasion pathways.
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Affiliation(s)
- Adam Konečný
- INRA, CBGP, Campus international de Baillarguet, CS 30016, Montferrier-sur-Lez cedex, F-34988, France
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17
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Short KH, Petren K. Multimodal dispersal during the range expansion of the tropical house gecko Hemidactylus mabouia. Ecol Evol 2012; 1:181-90. [PMID: 22393494 PMCID: PMC3287299 DOI: 10.1002/ece3.18] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2011] [Revised: 07/18/2011] [Accepted: 07/19/2011] [Indexed: 11/30/2022] Open
Abstract
Dispersal influences both the ecological and evolutionary dynamics of range expansion. While some studies have demonstrated a role for human-mediated dispersal during invasion, the genetic effects of such dispersal remain to be understood, particularly in terrestrial range expansions. In this study, we investigated multimodal dispersal during the range expansion of the invasive gecko Hemidactylus mabouia in Florida using 12 microsatellite loci. We investigated dispersal patterns at the regional scale (metropolitan areas), statewide scale (state of Florida), and global scale (including samples from the native range). Dispersal was limited at the smallest, regional scale, within metropolitan areas, as reflected by the presence of genetic structure at this scale, which is in agreement with a previous study in this same invasion at even smaller spatial scales. Surprisingly, there was no detectable genetic structure at the intermediate statewide scale, which suggests dispersal is not limited across the state of Florida. There was evidence of genetic differentiation between Florida and other areas where H. mabouia occurs, so we concluded that at the largest scale, dispersal was limited. Humans likely contributed to patterns of dispersal at all three scales but in different ways. Infrequent low-volume dispersal has occurred within regions, frequent high-volume dispersal has occurred across the state, and infrequent long-distance dispersal has occurred among continents at the global scale. This study highlights the importance of considering different modes of dispersal at multiple spatial scales to understand the dynamics of invasion and range expansion.
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Affiliation(s)
- Kristen H Short
- Department of Biological Sciences, University of Cincinnati Cincinnati, Ohio 45221-0006
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18
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O'Neill EM, Beard KH, Pfrender ME. Cast adrift on an island: introduced populations experience an altered balance between selection and drift. Biol Lett 2012; 8:890-3. [PMID: 22718957 DOI: 10.1098/rsbl.2012.0312] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
A long-standing question in evolutionary biology is what becomes of adaptive traits when a species expands its range into novel environments. Here, we report the results of a study on an adaptive colour pattern polymorphism (stripes) of the coqui frog, Eleutherodactylus coqui, following its introduction to Hawaii from Puerto Rico. We compared population differentiation (Φ ST and F ST ) for the stripes locus--which underlies this colour pattern polymorphism--with neutral microsatellite loci to test for a signature of selection among native and introduced populations. Among native populations, Φ ST and F ST for stripes were lower than expected under the neutral model, suggesting uniform balancing selection. Alternatively, among introduced populations, Φ ST and F ST for stripes did not differ from the neutral model. These results suggest that the evolutionary dynamics of this previously adaptive trait have become dominated by random genetic drift following the range expansion.
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Affiliation(s)
- Eric M O'Neill
- Department of Biology, Utah State University, Logan, UT 84322, USA.
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19
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FOUQUET ANTOINE, LEDOUX JEANBAPTISTE, DUBUT VINCENT, NOONAN BRICEP, SCOTTI IVAN. The interplay of dispersal limitation, rivers, and historical events shapes the genetic structure of an Amazonian frog. Biol J Linn Soc Lond 2012. [DOI: 10.1111/j.1095-8312.2012.01871.x] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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20
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Bisrat SA, White MA, Beard KH, Richard Cutler D. Predicting the distribution potential of an invasive frog using remotely sensed data in Hawaii. DIVERS DISTRIB 2011. [DOI: 10.1111/j.1472-4642.2011.00867.x] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
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21
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Tonione MA, Reeder N, Moritz CC. High genetic diversity despite the potential for stepping-stone colonizations in an invasive species of gecko on Moorea, French Polynesia. PLoS One 2011; 6:e26874. [PMID: 22073211 PMCID: PMC3206873 DOI: 10.1371/journal.pone.0026874] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2011] [Accepted: 10/05/2011] [Indexed: 11/30/2022] Open
Abstract
Invasive species often have reduced genetic diversity, but the opposite can be true if there have been multiple introductions and genetic admixture. Reduced diversity is most likely soon after establishment, in remote locations, when there is lower propagule pressure and with stepping-stone colonizations. The common house gecko (Hemidactylus frenatus) was introduced to Moorea, French Polynesia in the remote eastern Pacific within the last two decades and accordingly is expected to exhibit low diversity. In contrast, we show that H. frenatus on Moorea has exceptionally high genetic diversity, similar to that near the native range in Asia and much higher than reported for other Pacific island reptiles. The high diversity in this recently founded population likely reflects extensive genetic admixture in source population(s) and a life history that promotes retention of diversity. These observations point to the importance of understanding range-wide dynamics of genetic admixture in highly invasive species.
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Affiliation(s)
- Maria A Tonione
- Museum of Vertebrate Zoology, University of California, Berkeley, California, United States of America.
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22
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Olson CA, Beard KH, Koons DN, Pitt WC. Detection probabilities of two introduced frogs in Hawaii: implications for assessing non-native species distributions. Biol Invasions 2011. [DOI: 10.1007/s10530-011-0125-5] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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23
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Bronnenhuber JE, Dufour BA, Higgs DM, Heath DD. Dispersal strategies, secondary range expansion and invasion genetics of the nonindigenous round goby, Neogobius melanostomus, in Great Lakes tributaries. Mol Ecol 2011; 20:1845-59. [PMID: 21492265 DOI: 10.1111/j.1365-294x.2011.05030.x] [Citation(s) in RCA: 72] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Dispersal strategies are important mechanisms underlying the spatial distribution and colonizing ability of all mobile species. In the current study, we use highly polymorphic microsatellite markers to evaluate local dispersal and colonization dynamics of the round goby (Neogobius melanostomus), an aquatic invader expanding its range from lake to river environments in its introduced North American range. Genetic structure, genotype assignment and genetic diversity were compared among 1262 round gobies from 20 river and four lake sites in three Great Lakes tributaries. Our results indicate that a combination of short-distance diffusion and long-distance dispersal, collectively referred to as 'stratified dispersal', is facilitating river colonization. Colonization proceeded upstream yearly (approximately 500 m/year; 2005-2009) in one of two temporal replicates while genetic structure was temporally stable. Contiguous dispersal from the lake was observed in all three rivers with a substantial portion of river fish (7.3%) identified as migrants. Genotype assignment indicated a separate introduction occurred upstream of the invasion front in one river. Genetic diversity was similar and relatively high among lake and recently colonized river populations, indicating that founder effects are mitigated through a dual-dispersal strategy. The remarkable success of round goby as an aquatic invader stresses the need for better diffusion models of secondary range expansion for presumably sessile invasive species.
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Affiliation(s)
- Jennifer E Bronnenhuber
- Great Lakes Institute for Environmental Research, University of Windsor, 401 Sunset Ave. Windsor, ON N9B 3P4, Canada
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24
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Abstract
Two of the earliest examples of successful invasive amphibians are the greenhouse frog (Eleutherodactylus planirostris) and the Cuban treefrog (Osteopilus septentrionalis) in Florida. Although both are generally assumed to be recent introductions, they are widespread on Caribbean islands and also have been proposed as natural colonizers. We obtained nucleotide sequence data for both species and their closest relatives in their native and introduced ranges. Phylogenetic analyses trace the origin of E. planirostris to a small area in western Cuba, while O. septentrionalis is derived from at least two Cuban sources, one probably a remote peninsula in western Cuba. The tropical-to-temperate invasion began with colonization of the Florida Keys followed by human-mediated dispersal within peninsular Florida. The subtropical Keys may have served as an adaptive stepping stone for the successful invasion of the North American continent.
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Affiliation(s)
- Matthew P Heinicke
- Department of Biology, 208 Mueller Laboratory, The Pennsylvania State University, University Park, PA 16802, USA
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25
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Schrey AW, Grispo M, Awad M, Cook MB, McCoy ED, Mushinsky HR, Albayrak T, Bensch S, Burke T, Butler LK, Dor R, Fokidis HB, Jensen H, Imboma T, Kessler-Rios MM, Marzal A, Stewart IRK, Westerdahl H, Westneat DF, Zehtindjiev P, Martin LB. Broad-scale latitudinal patterns of genetic diversity among native European and introduced house sparrow (Passer domesticus) populations. Mol Ecol 2011; 20:1133-43. [PMID: 21251113 DOI: 10.1111/j.1365-294x.2011.05001.x] [Citation(s) in RCA: 48] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Introduced species offer unique opportunities to study evolution in new environments, and some provide opportunities for understanding the mechanisms underlying macroecological patterns. We sought to determine how introduction history impacted genetic diversity and differentiation of the house sparrow (Passer domesticus), one of the most broadly distributed bird species. We screened eight microsatellite loci in 316 individuals from 16 locations in the native and introduced ranges. Significant population structure occurred between native than introduced house sparrows. Introduced house sparrows were distinguished into one North American group and a highly differentiated Kenyan group. Genetic differentiation estimates identified a high magnitude of differentiation between Kenya and all other populations, but demonstrated that European and North American samples were differentiated too. Our results support previous claims that introduced North American populations likely had few source populations, and indicate house sparrows established populations after introduction. Genetic diversity also differed among native, introduced North American, and Kenyan populations with Kenyan birds being least diverse. In some cases, house sparrow populations appeared to maintain or recover genetic diversity relatively rapidly after range expansion (<50 years; Mexico and Panama), but in others (Kenya) the effect of introduction persisted over the same period. In both native and introduced populations, genetic diversity exhibited large-scale geographic patterns, increasing towards the equator. Such patterns of genetic diversity are concordant with two previously described models of genetic diversity, the latitudinal model and the species diversity model.
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Affiliation(s)
- A W Schrey
- Department of Integrative Biology, University of South Florida, Tampa, Florida 33620, USA.
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26
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Gasc A, Duryea MC, Cox RM, Kern A, Calsbeek R. Invasive predators deplete genetic diversity of island lizards. PLoS One 2010; 5:e12061. [PMID: 20706576 PMCID: PMC2919386 DOI: 10.1371/journal.pone.0012061] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2010] [Accepted: 07/09/2010] [Indexed: 11/19/2022] Open
Abstract
Invasive species can dramatically impact natural populations, especially those living on islands. Though numerous examples illustrate the ecological impact of invasive predators, no study has examined the genetic consequences for native populations subject to invasion. Here we capitalize on a natural experiment in which a long-term study of the brown anole lizard (Anolis sagrei) was interrupted by rat invasion. An island population that was devastated by rats recovered numerically following rat extermination. However, population genetic analyses at six microsatellite loci suggested a possible loss of genetic diversity due to invasion when compared to an uninvaded island studied over the same time frame. Our results provide partial support for the hypothesis that invasive predators can impact the genetic diversity of resident island populations.
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Affiliation(s)
- Amandine Gasc
- Department of Biological Sciences, Dartmouth College, Hanover, New Hampshire, United States of America
| | - M. C. Duryea
- Department of Biological Sciences, Dartmouth College, Hanover, New Hampshire, United States of America
| | - Robert M. Cox
- Department of Biological Sciences, Dartmouth College, Hanover, New Hampshire, United States of America
| | - Andrew Kern
- Department of Biological Sciences, Dartmouth College, Hanover, New Hampshire, United States of America
| | - Ryan Calsbeek
- Department of Biological Sciences, Dartmouth College, Hanover, New Hampshire, United States of America
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27
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O'Neill EM, Beard KH. Genetic Basis of a Color Pattern Polymorphism in the Coqui Frog Eleutherodactylus coqui. J Hered 2010; 101:703-9. [PMID: 20643755 DOI: 10.1093/jhered/esq082] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Affiliation(s)
- Eric M O'Neill
- Department of Biology, Utah State University, Logan, UT 84322-5305, USA
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28
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