Thomas F. Turner

Thomas F. Turner
University of New Mexico | UNM · Department of Biology

PhD 1996
Professor of Biology and Curator of Fishes, Museum of Southwestern Biology

About

363
Publications
22,258
Reads
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3,135
Citations
Introduction
Our research group studies ecology, evolution, and conservation of aquatic biota in dryland regions of the world. We use time-series analyses, museum specimens and archives, elements (e.g., stable isotopes) and molecules (e.g., DNA, RNA) to document and study responses of species, communities, and ecosystems to natural and human-caused environmental change.
Additional affiliations
July 2014 - present
University of New Mexico
Position
  • Head of Faculty
August 2009 - present
University of New Mexico
Position
  • Professor (Full)
August 1998 - present
University of New Mexico
Position
  • Curator of Fishes

Publications

Publications (363)
Article
Full-text available
Rio Grande Sucker is continuously distributed in parts of its range, but occurs in geographically isolated populations at the periphery. We used ten microsatellites and DNA sequence data from the mitochondrial cytochrome-b gene to characterize genetic diversity and reconstruct evolutionary relationships of five peripheral populations in the southwe...
Article
Full-text available
Few studies have evaluated the effects of large wildfires on downstream non-salmonid fish assemblages. Using multi-year (2009–2015) data from fish assemblage surveys and high-frequency water quality monitoring, we analyzed within-site responses of a cypriniform-dominated fish assemblage at two sites located > 20 km downstream of a 633 km2 wildfire...
Chapter
Full-text available
At its core, conservation genetics aims to characterize genetic diversity in space and time, to infer processes that change diversity, and to use that information to prescribe actions that maintain and enhance diversity and self-sustainability of imperiled species. The field of conservation genomics, fueled by rapid advances in DNA sequencing and g...
Article
Full-text available
Many salmonids exist in highly structured and isolated populations, and are susceptible to habitat fragmentation and disturbances. Gila Trout (Oncorhynhus gilae) is a threatened species found in the Southwestern United States, and is managed to preserve relict populations (i.e., lineages) distributed across a fragmented landscape. We evaluated geno...
Article
Patterns of genetic diversity and effective size should be predicted by life history traits (intrinsic), landscape properties (extrinsic), and population dynamics. Theoretical models portray complicated relationships among population subdivision, rates of extirpation and recolonization, and metapopulation genetic effective size (metaNe), but make s...
Article
Animal body size estimation from zooarchaeological specimens often relies on specific, one-dimensional (i.e., conventional) measures from skeletal elements. Here, we introduce an animal body size estimation technique for archaeological fishes that relies on 3D reference scans and the calculation of centroid size, a standard 3D geometric morphometri...
Preprint
Full-text available
In this study, we combined reduced representation DNA sequencing from nextRAD with whole genome sequencing to identify putative sex-associated genetic markers, and to design primers for PCR validation. Several analytical methods were employed to detect potential sex-specific short reads from nextRAD, sex-specific contigs from genome sequencing and...
Chapter
Viewed from a figurative distance, the conservation of Gila trout would seem a rather straightforward, relatively simple proposition. The reasons for its decline and imperilment are known, actions to rectify them have been identified, many of those actions have been implemented, and efforts to diminish, mitigate, and eliminate the remaining threats...
Article
Hatchery programs are critical for conservation and management of many imperiled fishes. Most traditional aquaculture programs negatively affect ecological performance, genetic, and phenotypic diversity of hatchery-origin fish compared with wild counterparts. Here, we synthesize outcomes of three conservation programs aimed at enhancing ‘wildness’....
Article
Full-text available
Gila elegans, Hybognathus amarus, and Tiaroga cobitis (Family Cyprinidae, Order Cypriniformes) are endemic and endangered fishes in the southwestern United States. We present complete mitochondrial genomes for each species. Each mitochondrion consisted of 13 protein-coding genes, 2 ribosomal (rRNA) genes, 22 transfer RNA (tRNA) genes, and a single...
Article
Simultaneous management actions often are used to improve the status of imperiled species yet the effects of these actions can be difficult to determine. The endangered Rio Grande Silvery Minnow is a short‐lived fish with a dispersive life history and thus requires‐ but does not occupy‐ unfragmented habitat for recruitment and survival. We used Rio...
Article
We report results from a 3-year field investigation to limit hybridization between native and nonnative suckers in 2 small tributaries of the Gunnison River basin, Delta County, Colorado. Upstream movement to spawning habitat was selectively impeded by picket weir in intermittent Cottonwood Creek. There, native suckers were identified based on morp...
Preprint
Full-text available
In the late 1940s, Rio Grande Sucker Pantosteus plebeius was reported in tributaries of the Gila River in the Colorado Basin and presumed to be introduced because of its absence in mid-19th century surveys. We assayed genetic variation at 10 microsatellite loci and two mtDNA genes (cyt b and ND4) to test the hypothesis of human-mediated introductio...
Article
Full-text available
The Sacramento Mountain Salamander (Aneides hardii) is a fully terrestrial plethodontid endemic to mountains in south-central New Mexico. Aneides hardii is a species of conservation concern in New Mexico but there is scant knowledge regarding the degree of genetic divergence among populations. This information is vital for developing an appropriate...
Article
Full-text available
Etheostoma cyanorum, endemic to the Blue River drainage of southern Oklahoma, is redescribed and recognized as a distinct species within the Etheostoma whipplei–Etheostoma radiosum complex, separating it from E. radiosum. Originally described as Poecilichthys radiosus cyanorum, it was one of three putative subspecies of E. radiosum (with E. r. radi...
Article
Full-text available
• Disturbance regimes of arid regions throughout the world are changing along with global warming. Severity of drought associated with decreased stream discharge and increased frequency and intensity of wildfires are increasing in many of these systems. Combined, these factors can have potentially devastating effects on stream fish communities. • T...
Article
Full-text available
Coastal habitats in Chile are hypothesized to support a number of diadromous fish species. The objective of this study was to document migratory life histories of native galaxiids and introduced salmonids from a wide latitudinal range in Chilean Patagonia (39-48 • S). Otolith microchemistry data were analysed using a recursive partitioning approach...
Article
Full-text available
Studying the reproductive ecology of aggregate broadcast spawning fishes is difficult because it generally is not feasible to sample all potential parents and unambiguously assign their offspring. We used molecular‐based parentage analysis to gain insights into the reproductive ecology of the endangered Bonytail, and to evaluate whether protected o...
Preprint
Full-text available
Compliance with Ethical Standards Otolith analysis was funded by a RAC grant from the University of New Mexico, USA. The Government of Chile supported the drafting of this document with a CONICYT Doctoral Fellowship to D. Alò in 2015 and to C. Correa through grants CONICYT-PAI N°82130009, and FONDECYT-Iniciación en la Investigación N°11150990. All...
Article
Full-text available
Comparative transcriptomics can now be conducted on organisms in natural settings, which has greatly enhanced understanding of genome–environment interactions. Here, we demonstrate the utility and potential pitfalls of comparative transcriptomics of wild organisms, with an example from three cyprinid fish species (Teleostei:Cypriniformes). We prese...
Article
Full-text available
Movement is necessary for re-colonization of habitats following disturbance, but methods to estimate dispersal of small-bodied fishes are limited. We evaluated the efficacy of otolith microchemistry in identifying habitat origin of longfin dace Agosia chrysogaster in the Gila River, NM, USA. Additionally, we used this method to determine the source...
Article
Full-text available
Summary 1.Young-of-year (YOY) fishes are sometimes numerically dominant vertebrate consumers in many large river systems, but their effects as predators are not as well understood as those of adult fishes. We predicted that YOY fishes influence community composition and abundance of invertebrate prey. Predation effects could be especially importan...
Article
Full-text available
Dendritic ecological network (DEN) architecture can be a strong predictor of spatial genetic patterns in theoretical and simulation studies. Yet, interspecific differences in dispersal capabilities and distribution within the network may equally affect species’ genetic structuring. We characterized patterns of genetic variation from up to ten micro...
Article
Full-text available
Climate change will strongly impact aquatic ecosystems particularly in arid and semi-arid regions. Fish-parasite interactions will also be affected by predicted altered flow and temperature regimes, and other environmental stressors. Hence, identifying environmental and genetic factors associated with maintaining diversity at immune genes is critic...
Article
Full-text available
A local hybrid swarm between Etheostoma radiosum and Etheostoma spectabile, found in June 1985 in a short reach of Little Glasses Creek, southern Oklahoma, consisted by eye of 35% phenotypic E. radiosum, 18% phenotypic E. spectabile, and 47% hybrids. In July 1985, investigation of an additional longer reach downstream of the initial discovery site...
Article
Full-text available
A peripheral population of mountain sucker, Pantosteus jordani, located in the Black Hills of South Dakota, USA, represents the eastern-most range of the species and is completely isolated from other populations. Over the last 50 years, mountain sucker populations have declined in the Black Hills, and now only occur in 40 % of the historic local ra...
Article
As with many endangered, long-lived iteroparous fishes, survival of razorback sucker depends on a management strategy that circumvents recruitment failure that results from predation by non-native fishes. In Lake Mohave, AZ-NV, management of razorback sucker centers on capture of larvae spawned in the lake, rearing them in off-channel habitats, and...
Article
Full-text available
Comparative transcriptomics can now be conducted on organisms in natural settings, which has greatly enhanced understanding of genome-environment interactions. However, important data handling and quality control challenges remain, particularly when working with non-model species outside of a controlled laboratory environment. Here, we demonstrate...
Article
Full-text available
Thorough sampling is necessary to delineate lineage diversity for polytypic ‘species’ such as Cyprinella lutrensis. We conducted extensive mtDNA sampling (cytochrome b and ND4) from the Pecos River, Rio Grande, and South Canadian River, New Mexico. Our study focussed on the Pecos River due to its complex geological history and potential to harbour...
Article
Full-text available
Climate change and fire suppression have altered fire regimes globally, leading to larger, more frequent, and more severe wildfires. Responses of coldwater stream biota to single wildfires are well studied, but measured responses to consecutive wildfires in warmwater systems that often include mixed assemblages of native and nonnative taxa are lack...
Article
Full-text available
The Cuatro Ciénegas killifish Lucania interioris is an endemic fundulid in the Chihuahuan Desert valley of Cuatro Ciénegas, Coahuila, México. It occurs in 3 major drainage regions of the basin and is limited primarily to naturally fragmented and physicochemically severe habitats of the valley floor. We assessed mitochondrial DNA variation and popul...
Article
Full-text available
Conservation genetic studies are challenged by the fact that populations of many imperiled species have experienced declines and fragmentation to the degree they no longer exhibit natural, self-sustaining metapopulation processes; characteristics of great importance to managers charged with their protection. Genetic patterns of species from minimal...
Article
Full-text available
Disruption of natural flow regimes, nutrient pollution, and other consequences of human population growth and development have impacted most major rivers of the world. Alarming losses of aquatic biodiversity and biotic homogenization coincide with human-caused river alteration, but effects on aquatic ecosystem processes are not as well documented....
Article
Full-text available
Razorback Sucker Xyrauchen texanus is iconic of the plight of native “big-river” fishes of the Colorado River system of western North America. The species was historically widespread and abundant throughout the basin but has suffered substantial range reductions and population declines now characteristic of Western fishes. By the 1960s the largest...
Data
Isotopic ratios for carbon and nitrogen reported in delta values (per mil) for fishes obtained from the Museum of Southwestern Biology (MSB) at the University of New Mexico for study of aquatic food web change over time. Sample No.= sequential number to track and count samples, Catalog No. = MSB catalog number, Field No. = number linking to field n...
Article
Ash flows and flooding associated with wildfires represent important but understudied sources of disturbance for fish populations. Knowledge concerning these disturbances is especially limited for larger streams where warm water species dominate. Fire-related disturbances have been hypothesised to differentially affect native and non-native fishes,...
Article
Full-text available
Aridland rivers can present several logistical challenges for invertebrate sampling due to shifting substrate and low invertebrate densities. We compared 4 sampling methods for collecting both meiofauna and macroinvertebrates in an aridland river (Rio Grande, New Mexico): a water column sampling method, an epibenthic core, a throwtrap, and a stovep...
Article
We used comparative landscape genetics to examine the relative roles of historical events, intrinsic traits, and landscape factors in determining the distribution of genetic diversity of river fishes across the North American Great Plains. Spatial patterns of diversity were overlaid on a patch-based graphical model, and then compared within and amo...
Article
Full-text available
In desert streams, fishes and other organisms that depend on surface water are predicted to inhabit smaller and more isolated wetted reaches, while the frequency and severity of disturbance is expected to increase under most climate change models. Together, these factors should reduce population genetic diversity and persistence probabilities. In t...
Article
Biodiversity in stream networks is threatened globally by interactions between habitat fragmentation and altered hydrologic regimes. In the Great Plains of North America, stream networks are fragmented by >19,000 anthropogenic barriers and flow regimes are altered by surface water retention and groundwater extraction. We documented the distribution...
Article
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Freshwater fish commonly exhibit differences in reproductive seasonality within assemblages. However, the extent of variation in reproductive timing among years is less well understood, particularly in relation to environmental variation. Phenological shifts in response to environmental variation, including climate change, can differ among species...
Article
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Time-series analysis is used widely in ecology to study complex phenomena and may have considerable potential to clarify relationships of genetic and demographic processes in natural and exploited populations. We explored the utility of this approach to evaluate population responses to management in razorback sucker, a long-lived and fecund, but de...
Article
Full-text available
Genetic determinants of seasonal reproduction are not fully understood but may be important predictors of organism responses to climate change. We used a comparative approach to study the evolution of seasonal timing within a fish community in a natural common garden setting. We tested the hypothesis that allelic length variation in the PolyQ domai...
Technical Report
Full-text available
The Nature Conservancy and a team of 14 academic partners (the project team) received funding from the Bureau of Reclamation’s WaterSMART program and the Desert Landscape Conservation Cooperative in 2012 to conduct this Gila River Flow Needs Assessment. The assessment describes the existing condition of the Gila River in the Cliff-Gila Valley and e...
Data
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Article
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Pupfishes (genus Cyprinodon) are iconic of biodiversity and endemism in the desert southwest of North America. Most of these species are imperiled, primarily because of excessive exploitation of water resources in this arid region. The critically endangered Julimes pupfish, Cyprinodon julimes, is restricted to a small, isolated, and highly modified...
Data
Full-text available
Table S1. Frequency of each mtDNA haplotype for each year. Table S2. MtDNA haplotypes for each individual. Collection # provides the abbreviated locality information and sample number. Table S3. Population genetic statistics for mtDNA haplotypes from each sample collected from 2004–2011 for razorback sucker in Lake Mohave, Arizona and Nevada. Table...
Article
Pelagic-broadcast spawning is a dominant mode of fish reproduction in the oceans and is associated with Fundamental Triad (i.e. nutrient enrichment, nutrient concentration, propagule retention) and Loophole (i.e. disruption of larval competition and predation) processes that are mediated by water currents. Pelagic-broadcast spawning is uncommon in...