Progress 10/01/15 to 09/30/16
Outputs Target Audience:The target audiences for the reporting period included state and federal natural resource agencies, academic scientists, and undergraduate and graduate students. Changes/Problems:
Nothing Reported
What opportunities for training and professional development has the project provided?One master's thesis student and one PhD student received training under the project. How have the results been disseminated to communities of interest?In addition to journal publications listed elsewhere, my PhD student and I made invited presentations to the Middle Rio Grande Adaptive Management Program on preliminary results from our development of a simulation model for the endangered Rio Grande silvery minnow. What do you plan to do during the next reporting period to accomplish the goals?I plan to complete two manuscripts on a simulation model for Rio Grande silvery minnow. In addition, I will work on developing a metapopulation simulation model for the same species. I have another paper in progress using spatial stream network models and I have been invited to present my work in a symposium in May.
Impacts What was accomplished under these goals?
Two papers were published that completed my work on genetics of the tadpole shrimp (Triops newberryi). One paper examined the putative role of males in some populations and concluded that there is little evidence they contribute to genetic profiles of offspring. The other paper published described the first transcriptome analysis and differential gene expression in Triops newberryi. With a PhD student dissertation research, we are studying the demography of the endangered Rio Grande silvery minnow (Hybognathus amarus) and using simulations as a tool for evaluating possible effects of alternate water management strategies. That work is nearing completion of a manuscript for journal publication. Additionally, I published with a Spanish coauthor, results of a spatial stream network analysis that identified landscape level factors affecting the endangered freshwater pearl mussel (Margaritifera margaritifera) and its larval fish hosts Atlantic salmon (Salmo salar) and brown trout (Salmo trutta). That paper was awarded "Editors Choice" in Diversity and Distributions.
Publications
- Type:
Journal Articles
Status:
Published
Year Published:
2016
Citation:
Horn, RL & DE Cowley. 2016. Self-fertilization and the role of males in populations of tadpole shrimp (Branchiopoda: Notostraca: Triops). Journal of Heredity 107:518-526.
- Type:
Journal Articles
Status:
Published
Year Published:
2017
Citation:
Horn, RL, N Devitt, T. Ramaraj, FD Shilkey & DE Cowley. 2017. De novo assembly of a tadpole shrimp (Triops newberryi) transcriptome and preliminary differential gene expression analysis. Molecular Ecology Resources 17:161-171.
- Type:
Journal Articles
Status:
Published
Year Published:
2017
Citation:
Lois, S & DE Cowley. 2017. Editor's Choice: Conservation of interacting species in network constrained environments. Diversity & Distributions 23:1235-1245.
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Progress 10/01/14 to 09/30/15
Outputs Target Audience:1. Scientists and agency personnel working in natural resource management. 2. Academic faculty teaching natural resources management topics in secondary and post-secondary institutions. Changes/Problems:
Nothing Reported
What opportunities for training and professional development has the project provided?The project provided professional training for two PhD students, Rebekah Horn and Michael Hatch. How have the results been disseminated to communities of interest?Yes, results were disseminated in the form of peer-reviewed journal papers. What do you plan to do during the next reporting period to accomplish the goals?Complete revisions to the two genetics papers on tadpole shrimp (T. newberryi) and draft a manuscript describing a sensitivity and elasticity analysis for fish demography will be produced. Further work will be done to prepare a conservation-oriented paper on the pearl mussel.
Impacts What was accomplished under these goals?
Progress was made on all three goals. Two manuscripts completed and submitted for publication, although both require revision that is currently on-going. The first paper describes the transcriptome of Triops newberryi nauplii reared in native and nonnative water conditions. Results are in revision for Molecular Ecology Resources. The second paper is a detailed analysis of mothers and individual offspring aimed at determining the mating system used by this species. This second paper is in revision for Journal of Heredity. Progress was made on goal 2 with a new project that was begun to develop a simulation model to evaluate water management alternatives. This approach will use a demographic model for an endangered fish species. Finally, a paper related to goal 3 was published in the Journal of Biogeography.
Publications
- Type:
Journal Articles
Status:
Published
Year Published:
2015
Citation:
Lois, S., DE Cowley, A Outeiro, E San Miguel, R Amaro, & P. Ondina. 2015. Spatial extent of biotic interactions affects species distribution and abundance in river networks: the freshwater pearl mussel and its hosts. Journal of Biogeography 42: 229-240.
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Progress 04/01/14 to 09/30/14
Outputs Target Audience: 1. Scientists and agency personnel working in natural resource management. 2.Academic faculty teaching natural resources management topics in secondary and post-secondary institutions. Changes/Problems:
Nothing Reported
What opportunities for training and professional development has the project provided? The project has provided professional training for graduate student Rebekah Horn. How have the results been disseminated to communities of interest? Yes. Results were disseminated in the form of peer-reviewed journal papers. What do you plan to do during the next reporting period to accomplish the goals? I plan to continue analyses on the genetics of tadpole shrimp to better elucidate ecological requirements of the different species in the Chihuahuan Desert. I also plan to further extend the work on freshwater mussels to enable development of a conservation framework for parasite-host systems.
Impacts What was accomplished under these goals?
Progress was on all goals. Two papers on the genetics of tadpole shrimp were published. The first paper described genetic structure between populations and found that the initial colonizers of an ephemeral pond strongly influence the genetic structure. There was an indication that migratory birds may facilitate colonization of ponds by crustaceans. The second paper used the complete mitochondrial DNA sequences to characterize the phylogenetic relationships between North American species of Triops and species from elsewhere in the world. Significant progress was made on goals 1 and 3, where a paper is in press in the Journal of Biogeography. That paper analyzes distribution and abundance of a freshwater mussel species that uses a fish host during its parasitic larval stage. The analyses show that biotic interactions with fish affect abundance of mussels over a spatial extent of up to 15 km. The analyses further showed that dams that limit fish movements in rivers have strong negative effects of mussel abundance.
Publications
- Type:
Journal Articles
Status:
Published
Year Published:
2014
Citation:
Horn, RL, R. Kuehn, V. Drechsel, & DE Cowley. 2014. Discriminating between the effects of founding events and reproductive mode on the genetic structure of Triops populations (Branchiopoda: Notostraca). PLOS One 9(5): e97473
- Type:
Journal Articles
Status:
Published
Year Published:
2014
Citation:
Horn, RL & DE Cowley. 2014. Evolutionary relationships within the Triops (Branchiopoda: Notostraca) using complete mitochondrial genomes. Journal of Crustacean Biology 34: 795-800.
- Type:
Journal Articles
Status:
Awaiting Publication
Year Published:
2014
Citation:
Lois, S, DE Cowley, A Outeiro, E San Miguel, R Amaro, & P Ondina. in press. Spatial extent of biotic interactions affects distribution and abundance in river networks: the freshwater pearl mussel and its hosts. Journal of Biogeography: in press.
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