DOCSLIB.ORG

Curriculum Vitae

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
Curriculum Vitae Bryan L. Brown Associate Professor, Aquatic Ecology Department of Biological Sciences, Virginia Tech 2125 Derring Hall, Blacksburg, VA 24061 (540) 231-2065 [email protected] https://mudbuglab.wordpress.com/ Academic Appointments Virginia Tech (Biological Sciences) Associate Professor 2017-present Virginia Tech (Biological Sciences) Assistant Professor 2011-2017 Clemson University (Forestry and Natural Resources) Assistant Professor 2006-2011 Education University of Texas (M. Leibold mentor) Integrative Biology Postdoc 2004-2006 Dartmouth College (K. Cottingham advisor) Biological Sciences Ph.D. 2004 Appalachian State Unv. (R. Creed advisor) Biology MS 1999 Unv. of North Carolina, Chapel Hill Biology BS 1995 Publications β = graduate student and postdoctoral authors from Brown lab; γ = undergraduate authors from Brown lab Creed, R. P., and B. L. Brown. In Press. Multiple mechanisms can stabilize a freshwater cleaning symbiosis. Freshwater Science. Pitt, A. L., J. H. Howard, R. F. Baldwin, E. D. Baldwin, and B. L. Brown. In Press. Small parks as local social-ecological systems contributing to conservation of small isolated and ephemeral wetlands. Natural Areas Journal. Hopkins, M. C., C. A. Thomason, B. L. Brown, L. T. Kirkpatrick, S. L. Paulson, and D. M. Hawley. 2018. Experimental logging alters the abundance and community composition of ovipositing mosquitoes in the southern Appalachians. Ecological Entomology 43:463-472. Patrick, C. J., and B. L. Brown. 2018. Species pool functional diversity plays a hidden role in generating β-diversity. The American Naturalist 191: E159-E170. Brown, B. L., C. Wahl, and C. M. Swan. 2018. Experimentally disentangling the influence of dispersal and habitat filtering on benthic invertebrate community structure. Freshwater Biology 63: 48-61. *featured in special issue on network effects in river ecology Tornwall BMβ, Swan CM, Brown BL. 2017. Manipulation of local environment produces different diversity outcomes depending on location within a river network. Oecologia 184: 663-674 Swan CM and Brown BL. 2017. Metacommunity theory meets restoration practice: Isolation mediates how ecological communities respond to stream restoration. Ecological Applications 27: 2209-2219. Carey, C. C., B. L. Brown, and K. L. Cottingham. 2017. The cyanobacterium Gloeotrichia echinulata increases the stability and network complexity of phytoplankton communities. Ecosphere 8: e01830-n/a. Vander Vorste, R., P. McElmurrayβ, S. Bellβ, K. M. Eliason, and B. L. Brown. 2017. Communication breakdown: Does stream size really explain biodiversity patterns in lotic systems? Diversity 9: 26. doi: 10.3390/d9030026. Brown, B. L., E. R. Sokolβ, J. Skeltonβ, and B. Tornwallβ. 2017. Making sense of metacommunities: dispelling the mythology of a metacommunity typology. Oecologia 183: 643-652. Sokol, E. R.β, B. L. Brown, and J. E. Barrett. 2017. A simulation-based approach to understand how metacommunity characteristics influence emergent biodiversity patterns. Oikos 126: 723- 737. Skelton, Jβ., K. M. Geyer, J. T. Lennon, R. P. Creed, and B. L. Brown. 2017. Multi-scale ecological filters shape the crayfish microbiome. Symbiosis 72: 159-170. Brown, B. L., M. W. Turnbull, J. Skeltonβ, and R. P. Creed. 2016. Ectosymbiotic cleaning mutualists induce down regulation of crayfish immune response genes. Freshwater Crayfish 22: 43-51. Skelton, J.β, R. P. Creed, L. Landler, and B. L. Brown. 2016. Geographic patterns of crayfish symbiont diversity persist over half a century despite seasonal fluctuations. Freshwater Crayfish 22: 9- 18. Thomas, M. J., R. P. Creed, J. Skeltonβ, and B.L. Brown. 2016. Ontogenetic shifts and symbiont succession in a freshwater cleaning symbiosis mutualism. Ecology 97: 1507-1517. Brown, B. L. , A. L. Downing, and M. A. Leibold. 2016. Compensatory dynamics stabilize aggregate community properties in response to multiple types of perturbations. Ecology 97: 2021- 2033. Skelton, J.β, S. Doakγ, M. Leonardγ, R. P. Creed, and B.L. Brown. 2016. The rules for symbiont community assembly change along a mutualism-parasitism continuum. Journal of Animal Ecology 85: 843-853. Skelton, J.β, R.P. Creed, and B.L. Brown. 2015. A symbiont’s dispersal strategy: Condition- dependent dispersal underlies predictable variation in direct transmission among hosts. Proceedings of the Royal Society B 282: 20152081. Creed, R. P., J. D. Lomonaco, M. J. Thomas, A. Meeks, and B.L. Brown. 2015. Reproductive dependence of a branchiobdellidan annelid on its crayfish host: Confirmation of a mutualism. Crustaceana 88:385-396. Tornwall, B.β, E. R. Sokolβ, J. Skeltonβ, and B.L. Brown. 2015. Trends in stream biodiversity research since the River Continuum Concept. Diversity 7: 16-35. Sokol, E. R.β, B.L. Brown, C. C. Carey, B. Tornwallβ, C. M. Swan, and J. E. Barrett. 2015. Linking management to biodiversity in built ponds using metacommunity simulations. Ecological Modelling 296: 36-45. Farrell, K. J., R. P. Creed, and B.L. Brown. 2014. Reduced densities of ectosymbiotic worms (Annelida: Branchiobellida) on reproducing female crayfish. Southeastern Naturalist 13:523-529. Swan, C. M., and B.L. Brown. 2014. Using rarity to infer how dendritic network structure shapes biodviersity in riverine communities. Ecography 37: 993-1001. Skelton, J. β, R. P. Creed, and B.L. Brown. 2014. Ontogenetic shift in host tolerance controls initiation of a cleaning symbiosis. Oikos 123: 677-686. Farrell, K.J., R.P. Creed, and B.L. Brown. 2014. Preventing overexploitation in a mutualism: Partner regulation in the crayfish-branchiobdellid symbiosis. Oecologia 174: 501-510. Downing, A., B.L. Brown, and M. A. Leibold. 2014. Multiple diversity-stability mechanisms enhance population and community stability in aquatic food webs. Ecology 95: 173-184. Skelton Jβ, K.J. Farrell, R.P. Creed, B.W. Williams, C. Ames, B.S. Helms, J. Stoekel, and B.L. Brown. 2013. Servants, scoundrels and hitchhikers: The manifold unsung roles of a crayfish ectosymbiont. Freshwater Science 32: 1345-1357. Thomas M.J., R.P. Creed, and B.L. Brown. 2013. The effects of environmental context and initial density on symbiont populations in a freshwater cleaning symbiosis. Freshwater Science 32: 1358-1366. Helms, B., Z. J. Loughman, B.L. Brown, and J. Stoeckel. 2013. Recent advances in crayfish biology, ecology, and conservation. Freshwater Science 32: 1273-1275. Brown, B. L. , R. P. Creed, J. Skeltonβ, M. A. Rollins, and K. J. Farrell. 2012. The fine line between mutualism and parasitism: Complex effects in a cleaning symbiosis demonstrated by multiple field experiments. Oecologia 170: 199-207. Howard J.H., Baldwin R.F., Brown B.L. 2012. Exploratory analysis for complex-life-cycle amphibians: Revealing complex forest-reproductive effort relationships simplified by model selection. Forest Ecology and Management 270: 175-182. Pitt, A. L. β, R. F. Baldwin, D. J. Lipscomb, B.L. Brown, J. E. Hawley, C. M. Allard-Keese, and P. B. Leonard. 2012. The missing wetlands: Using local ecological knowledge to find cryptic ecosystems. Biodiversity and Conservation 21: 51-63. Brown, B. L. , C. M. Swan, D. A. Auerbach, E. H. Campbell Grant, N. P. Hitt, K. O. Maloney, and C. Patrick. 2011. Metacommunity theory as a multispecies, multiscale framework for studying the influence of river network structure on riverine communities and ecosystems. Journal of the North American Benthological Society 30: 310-327. Swan, C. M. and B.L. Brown. 2011. Advancing theory of community assembly in spatially structured environments: local vs regional processes in river networks. Journal of the North American Benthological Society 30: 232-234. Brown, B. L. and C. M. Swan. 2010. Dendritic network structure constrains metacommunity properties in riverine ecosystems. Journal of Animal Ecology 79: 571-580. Brown, B.L. and R. L. Lawsonβ. 2010. Habitat heterogeneity and activity of an omnivorous ecosystem engineer control stream community dynamics. Ecology 91: 1799-1810. Swan, C. M., B.L. Brown, and C. A. DePalma. 2009. Identifying the relative importance of leaf versus shredder species loss on litter decomposition in streams. International Review of Hydrobiology 94: 452-471. Downing, A.L., Brown, B.L. , Perrin, E.M., Keitt, T.H. & Leibold, M.A. 2008. Environmental fluctuations induce scale-dependent compensation and increase stability in plankton ecosystems. Ecology 89: 3204-3214. Brown, B. L. 2007. Habitat heterogeneity and disturbance influence patterns of community temporal variability in a small temperate stream. Hydrobiologia 586: 93-106. Yoder, J. A., J. L. Tank, B.L. Brown, and H. H. Hobbs III. 2007. Water exchange pertaining to host attachment sites and stream preference in crayfish-associated branchiobdellids, Cambarincola fallax, and Cambarincola ingens (Annelida: Clitellata). Hydrobiologia 592: 523- 533. Cottingham, K. L., J. T. Lennon, and B.L. Brown. 2005. Knowing when to draw the line: designing more informative ecological experiments. Frontiers in Ecology and the Environment 3: 145-152. Brown, B. L., and R. P. Creed. 2004. Host preference by an aquatic ectosymbiotic annelid on 2 sympatric species of host crayfishes. Journal of the North Americian Benthological Society 23: 90-100. Brown, B. L. 2003. Spatial heterogeneity reduces temporal variability in stream insect communities. Ecology Letters 6: 1-10. Brown, B.L., R.P. Creed Jr., and W.E. Dobson. 2002. Branchiobdellid annnelids and their crayfish hosts: Are they engaged in a cleaning symbiosis? Oecologia 132: 250-255. Cottingham, K. L., B.L. Brown, and J. T. Lennon. 2001. Biodiversity may
Load more

Recommended publications
  • North American Benthological Society 2011 Annual Meeting
    North American Benthological Society 2011 Annual Meeting Responding to the Global Water Crisis Rhode Island Convention Center Providence, Rhode Island, USA 22–26 May 2011 Program Book Contents NABS 2011 Program Committee .................................................................................................................................................................. 1 NABS 2011 Elected Officers .......................................................................................................................................................................... 1 Acknowledgments ............................................................................................................................................................................................ 1 Meeting Sponsors ............................................................................................................................................................................................. 1 Support ALS Research..................................................................................................................................................................................... 1 Special Events and Activities .......................................................................................................................................................................... 1 The Great Debate...................................................................................................................................................................................................1
    [Show full text]
  • 2021 Virtual Summer Undergraduate Research Conference Abstract Book
    GoodwinVirtual Hall | July July 29,26, 20212018 || 9:00am9am-4pm - 4:30pm www.research.undergraduate.vt.edu Contents WELCOME FROM ASSOCIATE VICE PROVOST FOR UNDERGRADUATE EDUCATION, DR. JILL SIBLE 3 WELCOME FROM DIRECTOR OF THE OFFICE OF UNDERGRADUATE RESEARCH, KERI SWABY 4 SUMMER RESEARCH PROGRAMS AT VT 5 - 8 INFORMATIONAL BOOTHS 9 ABSTRACTS (ALPHABETICAL) 10 Jill C. Sible, Ph.D. Associate Vice Provost for Undergraduate Education, Professor of Biological Sciences Welcome With great enthusiasm, I welcome all to the 2021 Summer Undergraduate Research Conference at Virginia Tech. This year is particularly exciting to feature both the work of students conducting research remotely as well those who were able to join us in person. Many students presenting today, have spent ten or more weeks immersed in a research project. Summer affords undergraduates the opportunities to dedicate significant time and effort to the planning, execution and analysis of a research project. They have also had the chance to become authentic members of research teams by working with faculty, graduate students, postdoctoral fellows and research staff. Many thanks to all who have mentored undergraduates this summer. Your commitment to undergraduate research is always commendable, and especially this year given the extra challenges you overcame to offer safe and engaging research opportunities during the COVID-19 pandemic. Virginia Tech is pleased to offer these summer experiences not only to our own students, but also to undergraduates from all over the country. We hope that you have enjoyed your time working with Virginia Tech research teams, and we appreciate the diversity of ideas and cultures that you have brought to our research programs.
    [Show full text]
  • Society for Freshwater Science Annual Meeting May 21-26 2016 Sacramento Convention Center Street Level
    SOCIETY FOR FRESHWATER SCIENCE Annual Meeting MAy 21-26 2016 SACRAMENTO CONVENTION CENTER Street Level Third Floor Meeting Rooms Sacramento Convention Center Wifi Username: Society4FreshWater Password: science16 CONTENTS General Information Registration Information ..................................................6 Plenary Information .........................................................7-9 Awards .............................................................................10 Future Meeting: SFS2017 Raleigh .....................................11 Sponsors ..........................................................................12-13 Exhibitors .........................................................................14-16 Activities Workshops .......................................................................17 Taxonomy Events ..............................................................18 Field Trips .........................................................................19 Meetings ..........................................................................20 Events & Activities ............................................................20 Student/Post Doc Opportunities ......................................21 Instars Program ................................................................22 Presenter Information ......................................................23 Sessions Oral Sessions ....................................................................30-57 Poster Sessions .................................................................58-66
    [Show full text]
  • Society for Freshwater Science 2016-17 Annual Reports from Standing Committees
    Society for Freshwater Science 2016-17 Annual Reports from Standing Committees Finance Committee Report for 2016 Calendar Year Committee membership Kim Haag - Chair (appointed) Mike Swift (Treasurer) Irwin Polls (Journal Bus Mgr, non-voting) Dave Strayer (Past President) Matt Whiles (President) Emily Bernhardt (President Elect) Betsy Colburn (appointed) Anna Hamilton (appointed) The Society for Freshwater Science (SFS) ended 2016 in sound financial condition, with adequate operational income to meet operational expenses, and sufficient assets to provide a strong financial reserve against unanticipated events. The total revenue for SFS was $93,972, including dues ($70,694), awards income ($1,140), miscellaneous income ($56), and interest and dividends on the Investment Account ($22,075) and the Checking Account ($7). Operating expenses ($52,490) and SFS direct expenses at the annual meeting ($7,279) totaled $59,769, resulting in a positive balance of $34,203 for 2016. The profit from the 2016 Annual Meeting in Sacramento, CA was $30,298, after allocations to the various committees. The annual meeting profit was made available in equal parts to the Special Projects Fund ($15,149) and the Strategic Plan Initiatives Fund ($15,149). A total of $7,522 was spent from the Special Projects (Presidential Discretionary) Fund in 2016 on requests approved by the President. A total of $22,190 was spent on Strategic Plan Initiatives authorized by the Long-Range Planning Committee. The cash assets for SFS at the end of 2016 were $675,219, including the Checking Account ($82,345) and the Investment Account ($592,874). This includes the money set aside for use by the various special funds and committees (Student Resources Committee, Conservation and Environmental Issues Committee, Technical Issues Committee, Special Projects Fund, and Strategic Plan Initiatives Fund), which had a combined balance of $84,171.
    [Show full text]
  • Comparison of Grazing Impacts Between the Invasive New Z Ealand Mudsnail Potamopyrgus Antipidarum, and Native Macroinvertebrates + Amy C
    Krist and Charles: Comparison of Grazing Impacts Between the Invasive New Zealand Mu 97 COMPARISON OF GRAZING IMPACTS BETWEEN THE INVASIVE NEW Z EALAND MUDSNAIL POTAMOPYRGUS ANTIPIDARUM, AND NATIVE MACROINVERTEBRATES + AMY C. KRIST + CAROLINE C. CHARLES + DEPARTMENT OF ZOOLOGY & PHYSIOLOGY UNIVERSITY OF WYOMING + LARAMIE + A BSTRACT 2004) and hybridization (Perry et al. 2001), to ecosystem level effects, including domination of To understand the impacts of an herbivorous secondary production (Hall et al. 2006). and altered invasive species on native herbivores, it is critical to nutrient cycling (Gardner et al. 1995). Community quantify the relative impact of the invasive and the level effects of invasive species include changes in native species on shared resources. In a field community composition that can occur by extinction or experiment, we compared grazing efficacy of altered interactions, including herbivory, predation and periphyton by the invasive New Zealand mudsnail, competition (Lockwood et al. 2007). Because Potamopyrgus antipodarum, and 3 native organisms often compete for resources, one way to macroinvertebrate grazers. Depending on the measure understand the impacts of invasive species on native of periphyton biomass, P. antipodarum removed as species communities is to determine how invasive much or more periphyton than any of the native grazers. species use resources that are shared with native species When we examined diatom genera individually, P. and to compare the relative impact of invasive and antipodarum also suppressed the relative abundance of native species on this shared resource. For consumers, the greatest number of diatom genera and suppressed knowledge of the extent of dietary overlap between those diatoms more than the native grazers.
    [Show full text]
  • 2019 Annual Meeting Salt Palace Convention Center Floor Plans for the SFS 2019 Annual Meeting Contents Registration And
    Garrett/Flickr.com 2019 Annual Meeting Salt Palace Convention Center Floor Plans for the SFS 2019 Annual Meeting Contents Registration and About SFS ..............................................................................................2–3 Check-In Information General Information ..........................................................................4–7 Registration and check in for the meeting will be available Schedule At-A-Glance ....................................................................... 8–10 all week in the North Foyer of the Salt Palace. Please check Plenary Speakers .................................................................................. 11 in upon your arrival at the meeting in order to receive Awards...............................................................................................12–13 your name badge and other important materials and information. Fellows Awards ................................................................................14–15 Exhibitors ..........................................................................................16–17 REGISTRATION HOURS Sunday, May 19—4:00pm to 10:00pm Sponsors.................................................................................................. 18 Monday, May 20—8:00am to 11:00pm Workshops .............................................................................................. 19 Tuesday, May 21—8:00am to 7:00pm Special Events .......................................................................................
    [Show full text]
  • National Park Service Research Center
    i UNIVERSITY OF WYOMING - NATIONAL PARK SERVICE RESEARCH CENTER 37th ANNUAL REPORT 2014 EDITED BY HAROLD L. BERGMAN PROFESSOR DEPARTMENT OF ZOOLOGY AND PHYSIOLOGY DIRECTOR UW-NPS RESEARCH CENTER UNIVERSITY OF WYOMING ii UW-NPS Research Center Summer Address: Department 3166 UW-NPS Director 1000 University Avenue PO Box 170 Laramie, Wyoming 82071 Moran, Wyoming 83013 Telephone: (307) 766-4227 Telephone: (307) 543-2463 iii TABLE OF CONTENTS PAGE FRONT MATTER UW-NPS Research Center Personnel ----------------------------------------------------------------------------------------------------- v Director’s Column --------------------------------------------------------------------------------------------------------------------------- vi RESEARCH PROJECT REPORTS Geology Shallow Seismic Investigation of the Teton Fault Glenn Thackray, Mark Zellman, Jason Altekruse, Bruno Protti, and Harrison Colandrea .......................... ........................... 2 Hydrology Measuring the Morphology and Dynamics of the Snake River by Remote Sensing Carl J. Legleiter and Brandon T. Overstreet. ....... ..............................................................................................................................12 Ecology Kelly Warm Springs Historical Data Summary: Progress Report Paige Anderson, Aida M. Farag, and David D. Harper .................................................................................................................. 22 Simulating Expected Changes in Pollinator Resources as a Function of Climate Change Diane
    [Show full text]
  • September 2011
    Ellipsaria Vol. 13 - No. 3 September 2011 Newsletter of the Freshwater Mollusk Conservation Society Volume 13 – Number 3 September 2011 Who We Are Several pages in this issue are devoted to presenting Who We Are 1 the current Membership List for our Society. While any FMCS member could look up other members on our web site, putting the full membership list in Ellipsaria gives all Society News 2 of us a quick reference to the full list and reads into our permanent record exactly who was a member way back in 2011. Working up this list also gives us a chance to look Recent at the variety of people who have decided it is worth their Publications 3 time and money to become members of this society -- to see who we are. For starters, there now are 541 of us, more than 2 ½ Upcoming times the 200 members on the first published list, just eleven years ago (in August 2000). And our members are Meetings 3 spread out, coming from 10 countries (Australia, Brazil, Canada, Israel, Luxembourg, Portugal, Singapore, Spain, the United States, and the United Kingdom) and 44 of the Contributed 50 United States (all of the states except Alaska, Articles 4 Connecticut, Montana, Rhode Island, Utah, and Vermont). The institutional affiliations we listed (or not) also FMCS Membership indicate the range of our diversity. In decreasing order of occurrence, we are affiliated with colleges or universities List 24 (31%), federal governments (19%), state and local governments (16%), private companies (15%), “not indicated” (11%), museums and zoos (3%), and non- FMCS Officers 44 governmental conservation groups (3%).
    [Show full text]
  • JASM-2014-Program.Pdf
    SOCIETY FOR FRESHWATER SCIENCE ASSOCIATION FOR THE SCIENCES OF LIMNOLOGY AND OCEANOGRAPHY ADDRESS 5400 Bosque Boulevard, Suite 680 ADDRESS Waco, TX 76710-4446 5400 Bosque Boulevard, Suite 680 Waco, TX 76710-4446 PHONE 254-399-9636 FAX 254-776-3767 PHONE (Within the U.S., Canada, and the Caribbean) 800-929-ASLO EMAIL [email protected] WEB http://www.freshwater-science.org PHONE (All other countries) 254-399-9635 FAX 254-776-3767 EMAIL [email protected] WEB http://www.aslo.org WWW.SGMEET.COM/JASM2014/ PHYCOLOGICAL SOCIETY OF AMERICA SOCIETY OF WETLAND SCIENTISTS ADDRESS ADDRESS c/o John Stiller, PSA President 22 N. Carroll Street, Suite 300 Department of Biology Madison, WI 53703 Howell Science Complex, S301A East Carolina University PHONE 608-310-7855 Greenville, NC 27858 FAX 608-251-5941 PHONE 252-328-2738 EMAIL [email protected] FAX 252-328-4178 WEB http://www.sws.org EMAIL [email protected] WEB http://www.psaalgae.org PROGRAM BOOK “Bridging Genes to Ecosystems: Aquatic Science at a Time of Rapid Change” is the theme for this historic joint meeting of four of the leading aquatic scientific societies: Society for Freshwater Science (SFS), Association for the Sciences of Limnology and Oceanography (ASLO), Phycological Society of America (PSA), and Society of Wetland Scientists (SWS). For this one week in May of 2014, these four societies will build a bridge across the disciplines within the field of aquatic science and will explore many exciting opportunities for collaboration among scientists. FOR MORE INFORMATION, PLEASE CONTACT THE CONFERENCE MANAGEMENT OFFICE: [email protected] OR VISIT THE MEETING WEB SITE: WWW.SGMEET.COM/JASM14 We encourage you to use the meeting website and mobile app for all current information and to navigate the meeting.
    [Show full text]
  • Stephen Edward Devilbiss Dissertation Submitted to the Faculty of the Virginia Polytechnic Institute and State University In
    Effects of Freshwater Salinization and Associated Base Cations on Bacterial Ecology and Water Quality Stephen Edward DeVilbiss Dissertation submitted to the faculty of the Virginia Polytechnic Institute and State University in partial fulfillment of the requirements for the degree of Doctor of Philosophy In Crop and Soil Environmental Sciences Meredith K. Steele, Chair Brian D. Badgley, Co-Chair Leigh-Anne Krometis Bryan L. Brown Erin R. Hotchkiss November 30, 2020 Blacksburg, Virginia Keywords: Freshwater salinization, base cations, fecal indicator bacteria, microbiome, microbial ecology, biogeochemistry, water quality Copyright © 2020, Stephen Edward DeVilbiss Effects of Freshwater Salinization and Associated Base Cations on Bacterial Ecology and Water Quality Stephen Edward DeVilbiss ACADEMIC ABSTRACT Anthropogenic freshwater salinization, which is caused by numerous human activities including agriculture, urbanization, and deicing, impacts an estimated 37% of the contiguous drainage area in the United States. High salt concentrations in brackish and marine environments (~1,500 – 60,000 µS cm-1) influence aquatic bacteria. Less is known about the effects of freshwater salt concentrations (≤ 1,500 µS cm-1) on bacterial ecology, despite the pervasiveness of freshwater salinization. Bacteria perform many fundamental ecosystem processes (e.g. biogeochemical cycling) and serve as indicators of human health risk from exposure to waterborne pathogens. Thus, to understand how salt pollution affects freshwater ecosystems, there is a critical need to understand how freshwater salinization is impacting bacterial ecology. Using a series of controlled mesocosm experiments, my objectives were to determine how (1) survival of fecal indicator bacteria (FIB), (2) the diversity of native freshwater bacterial communities, and (3) bacterial respiration and nutrient uptake rates responded across a freshwater salinity gradient of different salt profiles.
    [Show full text]
  • Download File
    ANTHROPOGENIC AND LANDSCAPE FACTORS CONTROL STREAM NITROGEN TRANSFORMATIONS AT MULTIPLE SPATIAL SCALES A Dissertation Submitted to the Graduate School of the University of Notre Dame in Partial Fulfillment of the Requirements for the Degree of Doctor of Philosophy by Clay P. Arango, B.A., M.S. ________________________________ Jennifer L. Tank, Director Graduate Program in Biological Sciences Notre Dame, Indiana July 2007 ANTHROPOGENIC AND LANDSCAPE FACTORS CONTROL STREAM NITROGEN TRANSFORMATIONS AT MULTIPLE SPATIAL SCALES Abstract by Clay P. Arango Anthropogenic alterations to the global nitrogen (N) cycle have doubled reactive N flux into the biosphere and altered aquatic ecosystem function. Streams modify N loads carried to coastal ecosystems by converting N to organic forms or removing it as gaseous N. Understanding how streams transform N can offer insight to ecologists and land managers about how stream ecosystems function under elevated N loads. I researched how anthropogenic and landscape factors affect N transformations by studying streams in two distinct biomes and at multiple spatial scales. At the landscape scale, I studied N concentrations in streams draining the Teton Range (Wyoming, USA), a sub-alpine and alpine ecosystem with variable lithology. Streams draining crystalline geology had higher N compared to streams draining carbonate geology, which had more vegetation, suggesting that lithology mediated patterns in vegetation and terrestrial N retention. At the reach scale, I studied how land use influenced N uptake and transformation in Midwestern streams (Michigan, USA) and found that dissimilatory N transformation rates (i.e., nitrification and denitrification) Clay P. Arango within streams were not affected by riparian zones, which are commonly used to mitigate water quality degradation.
    [Show full text]
  • Biological Sciences
    Biological Sciences Vol. 13, No. 2 -- Fall/Winter 2016 http://www.biol.vt.edu A note from the department head In this issue Welcome to the fall 2016 edition of the Biological Sciences newsletter. It’s been Survivor Cells: 2 another eventful several months for the department, the college, and the university Hauf Research at large. Of particular note is that we welcomed our new dean, Dr. Sally Morton, to campus on July 1. She has quickly started to work where Dean Lay Nam Chang, the Woodpeckers Use Fungi 3 founding dean of the College of Science, left off – her State of the College address at to Expand Their Homes the beginning of November is worth a listen (see www.science.vt.edu)! In Memoriam: Allen 3 Earlier this month Dean Morton also visited Yousten with the department’s Alumni Advisory Board New and Renewed Grants 4 during their Fall meeting, held at the Price House Nature Center in downtown Blacksburg Professor Smyth’s 6 Butterflies (see photo below). The Center is the site of numerous outreach activities led by director David West Book Launch 7 Mike Rosenzweig, including in partnership Alumni Spotlights 8 with research faculty Lisa Belden, Dana Jerry Via Retirement 10 Hawley, and Brent Opell. During the Dean’s visit Dr. Rosenzweig reminded us of the Awards and Other 11 remarkable history of the Price House, one Photo courtesy courtesy of Assistant Professor of Announcements History LaDale Winling. of the few remaining properties of Blacksburg’s From: http://www.urbanoasis.org/ original 16 squares: Did you know? In March of 1872, General Gabriel C.
    [Show full text]