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Biology Faculty Publications

2018

Articles 1 - 18 of 18

Full-Text Articles in Ecology and Evolutionary Biology

Miniscule Differences Between Sex Chromosomes In The Giant Genome Of A Salamander, Melissa C. Keinath, Nataliya Y. Timoshevskaya, Vladimir A. Timoshevskiy, S. Randal Voss, Jeramiah J. Smith Dec 2018

Miniscule Differences Between Sex Chromosomes In The Giant Genome Of A Salamander, Melissa C. Keinath, Nataliya Y. Timoshevskaya, Vladimir A. Timoshevskiy, S. Randal Voss, Jeramiah J. Smith

Biology Faculty Publications

In the Mexican axolotl (Ambystoma mexicanum), sex is determined by a single Mendelian factor, yet its sex chromosomes do not exhibit morphological differentiation typical of many vertebrate taxa that possess a single sex-determining locus. As sex chromosomes are theorized to differentiate rapidly, species with undifferentiated sex chromosomes provide the opportunity to reconstruct early events in sex chromosome evolution. Whole genome sequencing of 48 salamanders, targeted chromosome sequencing and in situ hybridization were used to identify the homomorphic sex chromosome that carries an A. mexicanum sex-determining factor and sequences that are present only on the W chromosome. Altogether, …

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High Phenolic Content Fails To Deter Mesograzer Consumption Of Myriophyllum Spicatum (Eurasian Watermilfoil) In New England, Latina Steele, Courtney Ray, Michele Guidone Dec 2018

High Phenolic Content Fails To Deter Mesograzer Consumption Of Myriophyllum Spicatum (Eurasian Watermilfoil) In New England, Latina Steele, Courtney Ray, Michele Guidone

Biology Faculty Publications

Eurasian watermilfoil (Myriophyllum spicatum) is often considered one of the most aggressive macrophyte invaders in freshwater habitats throughout the United States. However, conditions leading to successful milfoil invasions are not well understood. This study sought to illuminate the role of 4 herbivores in determining milfoil invasion success via either enemy release or biotic resistance. We determined feeding preferences of three herbivores native to the northeastern United States and measured milfoil phenolic content, which may act as an herbivore feeding deterrent. We found that phenolic content in milfoil was two times higher than in two of the most abundant native macrophytes …

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The Effects Of Diet And Mating System On Reproductive (And Post‐Reproductive) Life Span In A Freshwater Snail, Josh R. Auld Dec 2018

The Effects Of Diet And Mating System On Reproductive (And Post‐Reproductive) Life Span In A Freshwater Snail, Josh R. Auld

Biology Faculty Publications

The length of the reproductive life span, along with the number/frequency/magnitude of reproductive events, quantifies an individual’s potential contribution to the next generation. By examining reproductive life span, and distinguishing it from somatic life span, we gain insight into critical aspects of an individual’s potential fitness as well as reproductive and somatic senescence. Additionally, differentiating somatic and reproductive life spans can provide insight into the existence of a post‐reproductive period and factors that shape its duration. Given the known importance of diet and mating system on resource allocation, I reared individual freshwater snails (Physa acuta) from 22 full‐sib families under …

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Meta-Analysis Challenges A Textbook Example Of Status Signalling And Demonstrates Publication Bias, Alfredo Sánchez-Tójar, Shinichi Nakagawa, Moisès Sánchez-Fortún, Dominic A. Martin, Sukanya Ramani, Antje Girndt, Veronika Bókony, Bart Kempenaers, András Liker, David F. Westneat, Terry Burke, Julia Schroeder Nov 2018

Meta-Analysis Challenges A Textbook Example Of Status Signalling And Demonstrates Publication Bias, Alfredo Sánchez-Tójar, Shinichi Nakagawa, Moisès Sánchez-Fortún, Dominic A. Martin, Sukanya Ramani, Antje Girndt, Veronika Bókony, Bart Kempenaers, András Liker, David F. Westneat, Terry Burke, Julia Schroeder

Biology Faculty Publications

The status signalling hypothesis aims to explain within-species variation in ornamentation by suggesting that some ornaments signal dominance status. Here, we use multilevel meta-analytic models to challenge the textbook example of this hypothesis, the black bib of male house sparrows (Passer domesticus). We conducted a systematic review, and obtained primary data from published and unpublished studies to test whether dominance rank is positively associated with bib size across studies. Contrary to previous studies, the overall effect size (i.e. meta-analytic mean) was small and uncertain. Furthermore, we found several biases in the literature that further question the support available …

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Review Of The Family Rivulidae (Cyprinodontiformes, Aplocheiloidei) And A Molecular And Morphological Phylogeny Of The Annual Fish Genus Austrolebias Costa 1998, Marcelo Loureiro, Rafael O. De Sá, Sebastián W. Serra, Felipe Alonso, Luis Esteban Krause Lanés, Matheus Vieira Volcan, Pablo Calviño, Dalton Nielsen, Alejandro Duarte, Graciela Garcia Oct 2018

Review Of The Family Rivulidae (Cyprinodontiformes, Aplocheiloidei) And A Molecular And Morphological Phylogeny Of The Annual Fish Genus Austrolebias Costa 1998, Marcelo Loureiro, Rafael O. De Sá, Sebastián W. Serra, Felipe Alonso, Luis Esteban Krause Lanés, Matheus Vieira Volcan, Pablo Calviño, Dalton Nielsen, Alejandro Duarte, Graciela Garcia

Biology Faculty Publications

The family Rivulidae is the fourth most diverse clade of Neotropical fishes. Together with some genera of the related African family Nothobranchiidae, many rivulids exhibit a characteristic annual life cycle, with diapausing eggs and delayed embryonic development, which allows them to survive in the challenging seasonal ponds that they inhabit. Rivulidae also includes two species known as the only the self-fertilizing vertebrates and some species with internal fertilization. The first goal of this article is to review the systematics of the family considering phylogenetic relationships and synapomorphies of subfamilial clades, thus unifying information that is dispersed throughout the literature. From …

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Multiple Facets Of Biodiversity Drive The Diversity-Stability Relationship, Dylan Craven, Nico Eisenhauer, William D. Pearse, Yann Hautier, Christiane Roscher, Forest Isbell, Michael Bahn, Carl Beierkuhnlein, Gerhard Bönisch, Nina Buchmann, Chaeho Byun, Jane A. Catford, Bruno E.L. Cerabolini, J. Hans C. Cornelissen, Joseph M. Craine, Enrica De Luca, Anne Ebeling, John N. Griffin, Andy Hector, Jes Hines, Anke Jentsch, Jens Kattge, Jürgen Kreyling, Vojtech Lanta, Nathan Lemoine, Sebastian T. Meyer, Vanessa Minden, Vladimir Onipchenko, H. Wayne Polley, Peter B. Reich, Jasper Van Ruijven, Brandon Schamp, Melinda D. Smith, Nadejda A. Soudzilovskaia, David Tilman, Alexandra Weigelt, Brian Wilsey, Peter Manning Aug 2018

Multiple Facets Of Biodiversity Drive The Diversity-Stability Relationship, Dylan Craven, Nico Eisenhauer, William D. Pearse, Yann Hautier, Christiane Roscher, Forest Isbell, Michael Bahn, Carl Beierkuhnlein, Gerhard Bönisch, Nina Buchmann, Chaeho Byun, Jane A. Catford, Bruno E.L. Cerabolini, J. Hans C. Cornelissen, Joseph M. Craine, Enrica De Luca, Anne Ebeling, John N. Griffin, Andy Hector, Jes Hines, Anke Jentsch, Jens Kattge, Jürgen Kreyling, Vojtech Lanta, Nathan Lemoine, Sebastian T. Meyer, Vanessa Minden, Vladimir Onipchenko, H. Wayne Polley, Peter B. Reich, Jasper Van Ruijven, Brandon Schamp, Melinda D. Smith, Nadejda A. Soudzilovskaia, David Tilman, Alexandra Weigelt, Brian Wilsey, Peter Manning

Biology Faculty Publications

A significant body of evidence has demonstrated that biodiversity stabilizes ecosystem functioning over time in grassland ecosystems. However, the relative importance of different facets of biodiversity underlying the diversity–stability relationship remains unclear. Here we used data from 39 biodiversity experiments and structural equation modeling to investigate the roles of species richness, phylogenetic diversity, and both the diversity and community-weighted mean of functional traits representing the ‘fast–slow’ leaf economics spectrum in driving the diversity–stability relationship. We found that high species richness and phylogenetic diversity stabilize biomass production via enhanced asynchrony. Contrary to our hypothesis, low phylogenetic diversity also enhances ecosystem stability …

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First Record Of The Genus Leptodactylus (Anura: Leptodactylidae) In Cuba: Leptodactylus Fragilis, A Biological Invasion?, Tomás M. Rodríguez-Cabrera, L. Yusnaviel García-Padrón, Andrés R. Acosta Galvis, Rafael O. De Sá, Roberto Alonso Bosch Aug 2018

First Record Of The Genus Leptodactylus (Anura: Leptodactylidae) In Cuba: Leptodactylus Fragilis, A Biological Invasion?, Tomás M. Rodríguez-Cabrera, L. Yusnaviel García-Padrón, Andrés R. Acosta Galvis, Rafael O. De Sá, Roberto Alonso Bosch

Biology Faculty Publications

The Neotropical genus Leptodactylus is currently represented by three species in the West Indies (Leptodactylus albilabris, Leptodactylus fallax and Leptodactylus validus). Based on morphological, acoustic and molecular evidence, we document the presence of a fourth species in the Caribbean region, Leptodactylus fragilis (Brocchi, 1877). The species was found at two localities in western Cuba, and molecular data suggest a northern South American origin, possibly Venezuela, for these populations. We discuss the potential invasive status of L. fragilis, based on its known distribution, relative abundance, behaviour and possible impacts on native species of Cuban amphibians.

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Molecular Adaptations For Sensing And Securing Prey And Insight Into Amniote Genome Diversity From The Garter Snake Genome, Blair W. Perry, Daren C. Card, Joel W. Mcglothlin, Giulia I.M. Pasquesi, Richard H. Adams, Drew R. Schield, Nicole R. Hales, Andrew B. Corbin, Jeffery P. Demuth, Federico G. Hoffmann, Michael W. Vandewege, Ryan K. Schott, Nihar Bhattacharyya, Belinda S.W. Chang, Nicholas R. Casewell, Gareth Whiteley, Jacobo Reyes-Velasco, Stephen P. Mackessy, Tony Gamble, Kenneth B. Storey, Kyle K. Biggar, Courtney N. Passow, Chih-Horng Kuo, Suzanne E. Mcgaugh, Anne M. Bronikowski, A.P. Jason De Koning, Scott V. Edwards, Michael E. Pfrender, Patrick Minx, Edmund D. Brodie Jr., Edmund D. Brodie Jr., Wesley C. Warren, Todd A. Castoe Jul 2018

Molecular Adaptations For Sensing And Securing Prey And Insight Into Amniote Genome Diversity From The Garter Snake Genome, Blair W. Perry, Daren C. Card, Joel W. Mcglothlin, Giulia I.M. Pasquesi, Richard H. Adams, Drew R. Schield, Nicole R. Hales, Andrew B. Corbin, Jeffery P. Demuth, Federico G. Hoffmann, Michael W. Vandewege, Ryan K. Schott, Nihar Bhattacharyya, Belinda S.W. Chang, Nicholas R. Casewell, Gareth Whiteley, Jacobo Reyes-Velasco, Stephen P. Mackessy, Tony Gamble, Kenneth B. Storey, Kyle K. Biggar, Courtney N. Passow, Chih-Horng Kuo, Suzanne E. Mcgaugh, Anne M. Bronikowski, A.P. Jason De Koning, Scott V. Edwards, Michael E. Pfrender, Patrick Minx, Edmund D. Brodie Jr., Edmund D. Brodie Jr., Wesley C. Warren, Todd A. Castoe

Biology Faculty Publications

Colubridae represents the most phenotypically diverse and speciose family of snakes, yet no well-assembled and annotated genome exists for this lineage. Here, we report and analyze the genome of the garter snake, Thamnophis sirtalis, a colubrid snake that is an important model species for research in evolutionary biology, physiology, genomics, behavior, and the evolution of toxin resistance. Using the garter snake genome, we show how snakes have evolved numerous adaptations for sensing and securing prey, and identify features of snake genome structure that provide insight into the evolution of amniote genomes. Analyses of the garter snake and other squamate reptile …

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Cross-Life Stage Effects Of Aquatic Larval Density And Terrestrial Moisture On Growth And Corticosterone In The Spotted Salamander, Julie F. Charbonnier, Jacquelyn Pearlmutter, James R. Vonesh, Caitlin R. Gabor, Zachery R. Forsburg, Kristine L. Grayson Jul 2018

Cross-Life Stage Effects Of Aquatic Larval Density And Terrestrial Moisture On Growth And Corticosterone In The Spotted Salamander, Julie F. Charbonnier, Jacquelyn Pearlmutter, James R. Vonesh, Caitlin R. Gabor, Zachery R. Forsburg, Kristine L. Grayson

Biology Faculty Publications

For organisms with complex life cycles, conditions experienced during early life stages may constrain later growth and survival. Conversely, compensatory mechanisms may attenuate negative effects from early life stages. We used the spotted salamander, Ambystoma maculatum, to test how aquatic larval density and terrestrial moisture influence juvenile growth, food intake, evaporative water loss and water reuptake rates, and corticosterone levels. We conducted an outdoor mesocosm experiment to manipulate larval density and transferred metamorphosed salamanders into low and high terrestrial moisture treatments in laboratory terrariums. After the larval stage, high-density salamanders were significantly smaller and had higher corticosterone release rates …

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Thermal Physiology And Developmental Plasticity Of Pigmentation In The Harlequin Bug (Hemiptera: Pentatomidae), Carly D. Sibilia, Kelly A. Brosko, Christopher J. Hickling, Lily M. Thompson, Kristine L. Grayson, Jennifer R. Olson Jul 2018

Thermal Physiology And Developmental Plasticity Of Pigmentation In The Harlequin Bug (Hemiptera: Pentatomidae), Carly D. Sibilia, Kelly A. Brosko, Christopher J. Hickling, Lily M. Thompson, Kristine L. Grayson, Jennifer R. Olson

Biology Faculty Publications

Traits that promote the maintenance of body temperatures within an optimal range provide advantages to ectothermic species. Pigmentation plasticity is found in many insects and enhances thermoregulatory potential as increased melanization can result in greater heat retention. The thermal melanism hypothesis predicts that species with developmental plasticity will have darker pigmentation in colder environments, which can be an important adaptation for temperate species experiencing seasonal variation in climate. The harlequin bug (Murgantia histrionica, Hemiptera: Pentatomidae, Hahn 1834) is a widespread invasive crop pest with variable patterning where developmental plasticity in melanization could affect performance. To investigate the impact of temperature …

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Geographic Variation In Larval Metabolic Rate Between Northern And Southern Populations Of The Invasive Gypsy Moth, Carolyn May, Noah Hillerbrand, Lily M. Thompson, Trevor M. Faske, Eloy Martinez, Dylan Perry, Salvatore J. Agosta, Kristine L. Grayson Jul 2018

Geographic Variation In Larval Metabolic Rate Between Northern And Southern Populations Of The Invasive Gypsy Moth, Carolyn May, Noah Hillerbrand, Lily M. Thompson, Trevor M. Faske, Eloy Martinez, Dylan Perry, Salvatore J. Agosta, Kristine L. Grayson

Biology Faculty Publications

Thermal regimes can diverge considerably across the geographic range of a species, and accordingly, populations can vary in their response to changing environmental conditions. Both local adaptation and acclimatization are important mechanisms for ectotherms to maintain homeostasis as environments become thermally stressful, which organisms often experience at their geographic range limits. The spatial spread of the gypsy moth (Lymantria dispar L.) (Lepidoptera: Erebidae) after introduction to North America provides an exemplary system for studying population variation in physiological traits given the gradient of climates encompassed by its current invasive range. This study quantifies differences in resting metabolic rate (RMR) across …

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Fern Genomes Elucidate Land Plant Evolution And Cyanobacterial Symbioses, Fay-Wei Li, Paul Brouwer, Lorenzo Carretero-Paulet, Shifeng Cheng, Jan De Vries, Pierre-Marc Delaux, Ariana Eily, Nils Koppers, Li-Yaung Kuo, Zheng Li, Mathew Simenc, Ian Small, Eric Wafula, Stephany Angarita, Michael S. Barker, Andrea Bräutigam, Claude Depamphilis, Sven Gould, Prashant S. Hosmani, Yao-Moan Huang, Bruno Huettel, Yoichiro Kato, Xin Liu, Steven Maere, Rose Mcdowell, Lukas A. Mueller, Klaas G. J. Nierop, Stefan A. Rensing, Tanner A. Robison, Carl J. Rothfels, Erin M. Sigel, Yue Song, Prakash R. Timilsena, Yves Van De Peer, Hongli Wang, Per K. I. Wilhelmsson, Paul G. Wolf, Xun Xu, Joshua P. Der, Henriette Schluepmann, Gane K.-S. Wong, Kathleen M. Pryer Jul 2018

Fern Genomes Elucidate Land Plant Evolution And Cyanobacterial Symbioses, Fay-Wei Li, Paul Brouwer, Lorenzo Carretero-Paulet, Shifeng Cheng, Jan De Vries, Pierre-Marc Delaux, Ariana Eily, Nils Koppers, Li-Yaung Kuo, Zheng Li, Mathew Simenc, Ian Small, Eric Wafula, Stephany Angarita, Michael S. Barker, Andrea Bräutigam, Claude Depamphilis, Sven Gould, Prashant S. Hosmani, Yao-Moan Huang, Bruno Huettel, Yoichiro Kato, Xin Liu, Steven Maere, Rose Mcdowell, Lukas A. Mueller, Klaas G. J. Nierop, Stefan A. Rensing, Tanner A. Robison, Carl J. Rothfels, Erin M. Sigel, Yue Song, Prakash R. Timilsena, Yves Van De Peer, Hongli Wang, Per K. I. Wilhelmsson, Paul G. Wolf, Xun Xu, Joshua P. Der, Henriette Schluepmann, Gane K.-S. Wong, Kathleen M. Pryer

Biology Faculty Publications

Ferns are the closest sister group to all seed plants, yet little is known about their genomes other than that they are generally colossal. Here, we report on the genomes of Azolla filiculoides and Salvinia cucullata (Salviniales) and present evidence for episodic whole-genome duplication in ferns—one at the base of ‘core leptosporangiates’ and one specific to Azolla. One fern-specific gene that we identified, recently shown to confer high insect resistance, seems to have been derived from bacteria through horizontal gene transfer. Azolla coexists in a unique symbiosis with N2-fixing cyanobacteria, and we demonstrate a clear pattern of cospeciation between …

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On The Relationship Between Phylogenetic Diversity And Trait Diversity, Caroline M. Tucker, T. Jonathan Davies, Marc W. Cadotte, William D. Pearse May 2018

On The Relationship Between Phylogenetic Diversity And Trait Diversity, Caroline M. Tucker, T. Jonathan Davies, Marc W. Cadotte, William D. Pearse

Biology Faculty Publications

Niche differences are key to understanding the distribution and structure of biodiversity. To examine niche differences, we must first characterize how species occupy niche space, and two approaches are commonly used in the ecological literature. The first uses species traits to estimate multivariate trait space (so‐called functional trait diversity, FD); the second quantifies the amount of time or evolutionary history captured by a group of species (phylogenetic diversity, PD). It is often—but controversially—assumed that these putative measures of niche space are at a minimum correlated and perhaps redundant, since more evolutionary time allows for greater accumulation of trait changes. This …

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Effect Of Growth Temperature On Photosynthetic Capacity And Respiration In Three Ecotypes Of Eriophorum Vaginatum, Jessica L. Schedlbauer, Ned Fetcher, Katherine Hood, Michael L. Moody, Jianwu Tang Apr 2018

Effect Of Growth Temperature On Photosynthetic Capacity And Respiration In Three Ecotypes Of Eriophorum Vaginatum, Jessica L. Schedlbauer, Ned Fetcher, Katherine Hood, Michael L. Moody, Jianwu Tang

Biology Faculty Publications

Ecotypic differentiation in the tussock‐forming sedge Eriophorum vaginatum has led to the development of populations that are locally adapted to climate in Alaska's moist tussock tundra. As a foundation species, E. vaginatum plays a central role in providing topographic and microclimatic variation essential to these ecosystems, but a changing climate could diminish the importance of this species. As Arctic temperatures have increased, there is evidence of adaptational lag in E. vaginatum, as locally adapted ecotypes now exhibit reduced population growth rates. Whether there is a physiological underpinning to adaptational lag is unknown. Accordingly, this possibility was investigated in reciprocal …

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The Evolutionary History Of Nebraska Deer Mice: Local Adaptation In The Face Of Strong Gene Flow, Susanne P Pfeifer, Stefan Laurent, Vitor C. Sousa, Catherine R. Linnen, Matthieu Foll, Laurent Excoffier, Hopi E. Hoekstra, Jeffrey D. Jensen Apr 2018

The Evolutionary History Of Nebraska Deer Mice: Local Adaptation In The Face Of Strong Gene Flow, Susanne P Pfeifer, Stefan Laurent, Vitor C. Sousa, Catherine R. Linnen, Matthieu Foll, Laurent Excoffier, Hopi E. Hoekstra, Jeffrey D. Jensen

Biology Faculty Publications

The interplay of gene flow, genetic drift, and local selective pressure is a dynamic process that has been well studied from a theoretical perspective over the last century. Wright and Haldane laid the foundation for expectations under an island-continent model, demonstrating that an island-specific beneficial allele may be maintained locally if the selection coefficient is larger than the rate of migration of the ancestral allele from the continent. Subsequent extensions of this model have provided considerably more insight. Yet, connecting theoretical results with empirical data has proven challenging, owing to a lack of information on the relationship between genotype, phenotype, …

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Examination Of Enrichment Using Space And Food For African Elephants At The Sdzsp, Charlotte Hacker, Lance Miller, Bruce A. Schulte Jan 2018

Examination Of Enrichment Using Space And Food For African Elephants At The Sdzsp, Charlotte Hacker, Lance Miller, Bruce A. Schulte

Biology Faculty Publications

Concern for elephant welfare in zoological facilities has prompted a number of exhibit and management modifications, including those involving enrichment. Knowledge of how these changes impact indicators of welfare, such as elephant movement and behaviour, is crucial for continued improvement of elephant husbandry and care. The present study used observations and GPS-collected data to determine the effects of available space and food presentation on the walking distance and behaviour of thirteen African elephants (Loxodonta africana), which had a dominance structure ascertained by animal care staff at the San Diego Zoo Safari Park (SDZSP). This facility has two exhibits of approximately …

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Leptodactylus Validus Garman, 1888 In Colombia: Its Distribution And Identification, Andres R. Acosta Galvis, Rafael O. De Sá Jan 2018

Leptodactylus Validus Garman, 1888 In Colombia: Its Distribution And Identification, Andres R. Acosta Galvis, Rafael O. De Sá

Biology Faculty Publications

Leptodactylus validus is reported for the first time for Colombia, corresponding to the tenth species of the L. melanonotus species group occurring in the country. In collections, all L. validus specimens were identified as L. colombiensis. Morphological, coloration, and ecological characters are provided to differentiate the two species in Colombia. Furthermore, the distribution of L. validus is expanded based on the examination of specimens in both collections and literature records. In addition, the advertisement call of L. validus from Colombia is compared with those reported for other continental and insular populations; the calls are slightly more similar to those …

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Physiological Responses To Elevated Temperature Across The Geographic Range Of A Terrestrial Salamander, Alexander J. Novarro, Caitlin R. Gabor, Cory B. Goff, Tori D. Mezebish, Lily M. Thompson, Kristine L. Grayson Jan 2018

Physiological Responses To Elevated Temperature Across The Geographic Range Of A Terrestrial Salamander, Alexander J. Novarro, Caitlin R. Gabor, Cory B. Goff, Tori D. Mezebish, Lily M. Thompson, Kristine L. Grayson

Biology Faculty Publications

Widespread species often possess physiological mechanisms for coping with thermal heterogeneity, and uncovering these mechanisms provides insight into species responses to climate change. The emergence of non-invasive corticosterone (CORT) assays allows us to rapidly assess physiological responses to environmental change on a large scale. We lack, however, a basic understanding of how temperature affects CORT, and whether temperature and CORT interactively affect performance. Here, we examine the effects of elevated temperature on CORT and whole-organism performance in a terrestrial salamander, Plethodon cinereus, across a latitudinal gradient. Using water-borne hormone assays, we found that raising ambient temperature from 15 to 25°C …

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