Center For Lakes and Reservoirs - Students

Click on the names below to go to personal websites where available.

Leslie Bliss-Ketchum

Leslieblissket@pdx.edu
Ph: 503-725-9076
Fax: 503.725.3834

BS in Environmental Sciences • Minor in Biology • Cum Laude • Portland State University

Leslie is working toward her MS in the ESR department.  Her project will focus on issues of road ecology including the efficacy of wildlife passage and prevention structures. The types, frequency and preferences of animal (mammals and amphibians) passage will be determined using motion detection cameras and tracking methods coupled with road kill surveys.  She is also the co-director of the Student Water Resources Group (SWRG) whose mission is to connect students with practical applications of in-class learning related to water resources. SWRG organizes field trips and speakers related to water resource issues.  In the summer of 2007, Leslie worked on New Zealand mud snail (NZMS) outreach in the Deschutes River Basin, where she gathered information on NZMS distribution while simultaneously conducting education and outreach to angling groups, recreational users and agencies on the Deschutes.  The aim of this work was to aid the identification of various ANS species in the PNW and to identify ways to prevent the spread and introduction of ANS by utilizing tested gear cleaning methods.  Leslie enjoys poetry, long walks on the beach and, when the mood strikes, poking dead things with sticks.

Valance Brenneis (PSU adjunct research affiliate)

Val

valbrenneis@gmail.com
Ph: 503.725.3834
Fax: 503.725.3834

PhD candidate, Graduate Group in Ecology, UC Davis
MEd, Secondary Science Education, George Washington University. 2004.
BA, Integrative Biology, University of California, Berkeley. 1998.

Food Web Impacts of Invasive Species
I am interested in the effect that invasive species have on aquatic food webs. My research focuses on the impact of the New Zealand mudsnail (Potamopyrgus antipodarum) on native benthic invertebrates, predators, and food web structure. My current work focuses on the impact of New Zealand mudsnails in the Columbia River Estuary, where they have become abundant in the brackish water of sheltered bays. I use a combination of surveys, stable isotope analysis, and laboratory competition and predation experiments to understand the factors influencing the distribution and impact of this invasive snail on the estuarine food web.

Tara Chestnut

Tara

chestnut@pdx.edu
Ph: 503.725.9076
Fax: 503.725.3834

PhD candidate
MES, Ecology and Environmental Policy, The Evergreen State College, 2004.
BS, Wildlife Biology, The Evergreen State Collge, 1996.

Tara has been involved in ecological research and environmental policy in the northwest since 1994.  She has worked in a variety of settings studying vertebrates, invertebrates and vegetation communities including commercially managed and reserve coniferous forests in the Cascade Mountains; scrub oak communities in the southern Rocky Mountains; remnant prairies, freshwater and marine systems in the Puget Sound Lowlands, shrub steppe in the Columbia and Great Basins, tundra in central Alaska, and the built environment and cubicle land in western Washington.

Through her research, Tara seeks to inform policy and decision making at local, regional and global scales.  Tara is concerned with making science more approachable to non-scientists, regulators, and policy makers by improving the ways scientists communicate science in non-traditional settings.

Timothy M. Davidson

Tim

tid@pdx.edu
Ph: 503.725.9076
Fax: 503.725.3834

MS: Oregon Institute of Marine Biology, University of Oregon • Biology
BS: Oregon State University • Environmental Sciences

Tim is a recent graduate (MS) from the Oregon Institute of Marine Biology.  His thesis research examined the invasion of the Australasian burrowing isopod (Sphaeroma quoianum) in Coos Bay, Oregon.  He is currently pursuing a PhD. in Environmental Sciences and Resources.  His primary research interests are biological invasions, crustacean biology, community ecology, and the conservation of aquatic systems.  Throughout his graduate and undergraduate career he has worked on a variety of projects ranging from biofouling studies in Florida, aquatic ecology in the Midwest lake systems, the green crab invasion in Oregon, and bioinvasions in Victoria and Tasmania, Australia.  Tim is continuing to investigate the invasion and ecology of Sphaeroma quoianum for his dissertation.  He is currently evaluating the relationship between erosion rate and the presence of isopod burrows in Coos Bay and conducting regional surveys for introduced species.  Future work will investigate the dispersal rate/distance, burrowing rates, and possible control options for Sphaeroma quoianum.

Vanessa Howard Morgan

Vanessa Howard

vhoward@pdx.edu
Ph: 503.725.2937
Fax: 503.725.3834

B.A Community Studies • UC Santa Cruz

Vanessa is in her fourth year at Portland State, researching the spread of non-native cordgrasses (Spartina spp.) in Pacific estuaries. Her research has focused on vegetative reproductive capabilities of Spartina alterniflora as well as examining the potential geographic spread of Spartina spp. propagules via ocean currents on the West Coast.  She is completing her thesis, while also working on a variety of other projects; these currently include updating the plant portion of the USGS Nonindigenous Aquatic Species database, conducting early detection surveys for Spartina, and developing a field guide for Alaska's aquatic plants.

Lynda Moore

Lyndalkmoore@pdx.edu
Ph: 503.725.9076
Fax: 503.725.3834

BS: Oregon State University ● Botany

Since earning her BS in Botany Lynda has been working on a project assessing the population establishment of biological control agents released in the Columbia River Estuary to treat purple loosestrife (Lythrum salicaria).  This study showed indications of successful agent establishment at many of the study sites but no agent presence at others.  In an effort to elucidate causal factors,  Lynda conducted field and laboratory experiments which established the beetles were able to tolerate the periods of inundation, water temperatures, and the mechanics of the tidal exchanges experienced at the study sites.  As a graduate student (MS) Lynda's research will focus on the role of refugia at these sites on population establishment of the biological control agents.  She also looks forward to being up to her ears in plants, bugs, mud, and the outdoors. 

Trevor Sheffels

trevorsheffels@pdx.edu
Ph: 503.725.9076
Fax: 503.725.3834

MEM, Environmental Management, Portland State University
BS Biology, Whitworth University

Trevor completed his MEM at Portland State University in December 2007.  His project focused on developing regional management strategies for the nutria (Myocastor coypus), an invasive semi-aquatic rodent native to South America.  Products from his work included a two-day national nutria management workshop and an assessment “Report on Nutria Management and Research in the Pacific Northwest.”  Trevor is now in the PhD program and continues to focus his research on regional nutria issues.  Research questions focus on differences between urban and non-urban nutria populations, habitat and movement modeling, and environmental impacts.  He is also a member of the national Aquatic Nuisance Species Task Force Nutria Working Group, which is charged with developing a national nutria management plan.  Trevor’s research is funded primarily by the United States Geological Survey National Wetlands Research Center and the United States Fish and Wildlife Service.

Whitney Temple

Whitneywtemple@pdx.edu
Ph: 503-725-8786

BS Social Sciences, Western Oregon University

Whitney is a first year graduate student pursuing an MS degree in the ESR department.  Her research plans are currently open, but her interests include constructed wetlands as a means of water treatment, the effects of wastewater contaminants on aquatic organisms, toxic algae bloom prevention, and bioremediation. Prior to coming to PSU, Whitney worked as a research and data analyst.

Steven W. Wells

Steven Wells

sww@pdx.edu
Ph: 503.725.9076
Fax; 503.725.3834

B.S. Environmental Sciences-Biology • Marist College, NY

Steve is a graduate student in the ESR department focusing on aquatic nuisance species. Time is divided between researching the life phenology of Potamogeton crispus, Curlyleaf Pondweed and expanding the Zebra Mussel Monitoring Network. Potamogeton crispus research addresses the formation and germination of vegetative structures called turions or stem apices in Blue Lake, Oregon. Steve is expanding the Zebra Mussel Monitoring Network through increased public outreach and education and recruiting new volunteers to deploy substrates.

Recent Graduates

Toni Pennington, PhD

Toni Pennington

PhD: Portland State University • Environmental Sciences & Resources
MS: Texas State University at San Marcos • Aquatic Biology
BS: Fort Lewis College • Environmental Biology

Toni is a former graduate student of PSU, successfully finishing her PhD work in 2007. She researched the biology of Egeria densa (Brazilian elodea) in California and Oregon and she assessed seasonal plant growth, production and nutrient allocation from plants collected from the Sacramento-San Joaquin Delta in California. The purpose of this research was to improve control of this highly invasive species in the Delta and other Western waterways. This research was supported by the Washington Department of Ecology, the California Bay-Delta Authority (CALFED), the Aquatic Ecosystem Restoration Foundation, and the USDA-APHIS at UC Davis.