> Geography Colloquium Series

The Department of Geography Fall 2009 Colloquium Series Presents:

 

Scott D. Tiegs

Assistant Professor,
Department of Biological Sciences
Oakland University,

Rochester, Minnesota

 

“Pacific Salmon and their Diverse Ecological Influences

on Alaskan Streams and Rivers”

 

Friday, October 30, 2009

2:30 pm [Please note: Special EARLY Start Time!!!]

Wilkeson 145 H

(inside the GIAL computing lab, Wilkeson 145)

During their annual spawning migrations, Pacific salmon (Oncorhynchus spp.) translocate large quantities of carbon, nitrogen and phosphorus from the ocean, where these fish acquire on the order of 99% of their biomass, to the streams and rivers in which they spawn and die. These nutrients - excreted as metabolic byproducts by live fish and leached from decomposing salmon carcasses - are thought to be an important resource that increases the abundance of stream organisms. Conversely, extensive nest construction in stream sediments by spawning salmon can disturb stream organisms,reducing their abundance. We conducted manipulative experiments and observational field studies on Prince of Wales Island, Southeast Alaska, that allowed an evaluation of the ecological effects of (1) nutrients excreted from live salmon, (2) nutrients leached from their carcasses, and (3) disturbance to stream sediments caused by salmon nest construction. Results suggest that live salmon can increase the concentrations of limiting nutrients, and consequently the abundance of primary producers, while carcasses have less pronounced influences. However, disturbance effects of nest-building activity can largely offset the increases in algal abundance afforded by salmon-derived nutrients. We also observed that the relative magnitude of these nutrient enrichment and disturbance effects can be influenced by timber harvest, a common land use throughout the range of salmon migrations. Collectively, these results illustrate how the diverse behaviors and life-history traits of salmon can have influences on stream ecosystems that depend on human activities, such as land use.

Dr. Scott Tiegs is a research ecologist with interests centered on human impacts to stream and riverine ecosystems. He has conducted field research on the riparian ecosystems of the Colorado River Delta in Mexico, the ecological effects of Pacific salmon in the rivers of Southeast Alaska, and the controls of leaf-litter decomposition in floodplain habitats of Italy, Germany and Switzerland. A theme that unites these projects is the exchange of carbon and nutrients among different ecosystems. Dr. Tiegs employs observational approaches and manipulative field experiments designed to assess riverine ecosystem structure and function. By aiming to improve understanding of human impacts on streams and rivers, he hopes to promote the appreciation, conservation and restoration of these socially and ecologically important ecosystems.

RECEPTION TO FOLLOW IN HALLWAY OUTSIDE

WILKESON 108

 

THIS EVENT Co-SPONSORED by the UNDERGRADUATE GEOGRAPHY STUDENT ASSOCIATION (UGSA)

& GEOGRAPHY GRADUATE STUDENT ASSOCIATION (GGSA)

 

For more info on the Colloquium Series contact Jared Aldstadt at: geojared@buffalo.edu

 

Unless otherwise stated, Each colloquium will run from 3:15-4:15pm in

145H Wilkeson Quad, Ellicott Complex/UB North Campus

 

Fall 2009 Colloquia

Fall 2009
Sept. 4 State of the Department  
Sept. 11 Dan Potts - Buffalo State College, Biology Department "Woody plants modulate CO2 exchange and soil moisture in a semi-arid savanna"
Sept. 18 NO COLLOQUIUM - Faculty Meeting [Rosh Hoshanah begins @ 6:00pm]
Sept. 25

Evolution, Ecology and Behavior Symposium on Invasive Species in WNY (Geology Dept.)

 
Oct. 2

Pascal Soares - French Honorary Consul in Buffalo

"Who Are the Geographers of the 21st Century?"

Oct. 16 NO COLLOQUIUM - Faculty Meeting  
Oct. 23

William F. Wieczorek - Buffalo State College - Director, Center for Health and Social Research - Professor, Dept. of Geography and Planning

 "Using GIS for Planning Mental Health Services"
Oct. 30

Scott Tiegs - Stream Ecology Lab, Department of Biological Sciences, Oakland University - (co-sponsor with ERIE IGERT)

 "Pacific Salmon and their Diverse Ecological Influences on Alaskan Streams and Rivers"
Nov. 13 NO COLLOQUIUM - Faculty Meeting  
Nov. 20 Kavita Pandit - Geography Awareness Week  
Nov. 27 NO COLLOQUIUM - Thanksgiving [UB closed--Thanksgiving Holiday]
Dec. 11 NO COLLOQUIUM - Faculty Meeting [Last day of classes]

 

Previous Colloquium Speakers:

Spring 2009 Colloquia

Spring 2009
Jan. 30 Joseph Desloges, University of Toronto The Geomorphology & Geo-archaeology of Holocene floodplains: examples from the Canadian lower Great Lakes
Feb. 27 Sam Cole, UB Planning Department Globalization, Agglomeration, and Chaos: Insights from Resort Tourism
March 13 SPRING BREAK NO COLLOQUIUM
March 27 AAG Annual Mtg - Las Vegas NO COLLOQUIUM
April 17 Jane Law, University of Waterloo

Building the Environment with our Heart

Fall 2008 Colloquia

Fall 2008
Sept. 26 NO COLLOQUIUM Gender Week Panel
Oct. 10 Wende Mix, Buffalo State College House Flipping and Neighborhood Change: A GIS-based Investigation
Oct. 17 Mark Paich, Principal, Decisio Multi-Method Modeling of Dynamic Social Systems
Oct. 23 Michele Masucci, Temple Informal Science Education and Geography - A review of approaches taken by the bITS Program
Oct. 31 Jennifer Rogalsky, SUNY Geneseo Culture of Poverty in Urban Schools: Attempting to Create a New Power Sharing Community Space in/of Learning
Nov. 7 Michael Baranick, National Defense University Rebuilding War-torn Countries: Presenting a New Model
Nov. 11 Andrew Turk, Murdoch University Ethnophysiography: Progress, Philosophy and Possibilities
Nov. 14 Mark Monmonier, Syracuse University

The Four Shorelines of Coastal Cartography: From Christopher Columbus to Al Gore
Nov. 21 Jingming Chen, University of Toronto Coupled water and carbon cycles in the boreal environment
Nov. 28 THANKSGIVING HOLIDAY NO COLLOQUIUM

Spring 2008 Colloquia

Spring 2008
Jan. 31 Charles H.V. Ebert, UB Geography Department Teaching Effectiveness & Public Speaking, Part I of IV, 12:30pm, Wilkeson 145H
Feb. 14 Charles H.V. Ebert, UB Geography Department Teaching Effectiveness & Public Speaking, Part II of IV, 12:30pm, Wilkeson 145H
March 4 Faculty Meeting  
March 6 Charles H.V. Ebert, UB Geography Department Teaching Effectiveness & Public Speaking, Part III of IV, 12:30pm, Wilkeson 145H
March 10-14 SPRING BREAK  
March 18 Faculty Meeting  
March 20 Charles H.V. Ebert, UB Geography Department Teaching Effectiveness & Public Speaking, Part IV of IV, 12:30pm, Wilkeson 145H
March 21 David Mark, UB Geography Department Cross-Cultural Ethno-physiography, 3:15pm, Fillmore 170
March 28 Bernard Hubbard, US Geological Survey

Land-use/cover Factors Influencing Soil Erosion and Turbidity Issues in the Chesapeake Bay Watershed: A Multi-temporal Satellite Imagery Perspective, 3:15pm, Fillmore 170

April 4 Alan D. Howard, University of Virginia Four Billion Years of Fluvial Activity on Mars, 3:15pm, Fillmore 170
April 8 Grad student presentations for AAG [in Wilkeson 144, 12:30-2:00pm, on TUESDAY, April 8]
April 10 Geography Career Fair 10:00am - 3:00pm, Hall outside Wilkeson 110
April 14-18 AAG Annual Mtg, Boston, Mass.

[NO COLLOQUIUM]

April 22 Faculty Meeting  
April 25 Alexander Klippel, GeoVISTA Center, Penn State University

Sapient Interfaces to Spatio-Temporal Information, 3:15pm, Fillmore 170
Fall 2007
Sept. 7 State of the Department 3:00 pm, MFAC 170
Sept. 21 Michael Woldenberg, UB Geography Department Special: Colloquium on Plagiarism
Sept. 28 Peter Rogerson (PhD ’82, UB Geography Department), UB Geography Department The Statistical Direction and Monitoring of Geographic Patterns
Oct. 12 Chi Ho Sham (MA ’80, PhD ’84, UB Geography Department), Sr. Scientist/Vice-President, Cadmus Corporation, Boston, MA (Special time: 1:00pm) The Role of Geography  in Protecting Drinking Water Supply Sources Across the U.S.
Oct. 19 Matt Bonner, UB Department of Social & Preventive Medicine Proximity to Atomic Energy Commission Sites and the Risk of Breast Cancer
Oct. 26 Janet Penksa, Geography PhD student; Commissioner of Administration, Finance, Policy, & Urban Affairs, City of Buffalo Blighted and Vacant Property in Buffalo: Incidence, Effect, and Approach within Varying Geographic Scales
Nov. 2 Mike Emch, University of North Carolina, Chapel Hill

Spatial, Environmental, and Social Network Analysis in Vaccine Trials
Nov. 16 Risa Palm, UB Geography Professor; Provost & Vice-Chancellor for Academic Affairs, The State University of New York Culture Realms in the United States: A Marketer’s Approach
Nov. 23 NO COLLOQUIUM Thanksgiving Holiday
Nov. 30 Charles H.V. Ebert, SUNY Distinguished Teaching Professor, Emeritus, UB Geography Department Intelligence and Disinformation
Dec. 7 NO COLLOQUIUM Geography Department Holiday Party
Spring 2007
Jan. 19 WNY GIS Users Group GIS: Innovating Natural Hazard Management, A Review of the ‘October Surprise’ Storm
Jan. 26 NO COLLOQUIUM FACULTY MEETING
Feb. 2

Gilberto Câmara, Director, Brazil’s

National Institute for Space Research (INPE)

From Pixels to Processes: Detecting the Evolution of Agents in a Landscape
Feb. 9 Billie Turner, Clark University Land Change Science and the Southern Yucatan
Feb. 23 Antonio Paez, McMaster University Spatial Analysis and Travel Behavior
March 2 NO COLLOQUIUM FACULTY MEETING
March 16 SPRING BREAK  
March 23 Peter Kinnell, University of Canberra

The Universal Soil Loss Equation, an Analysis

April 6 Lee Hunt, High Point, NC Police Department GIS and Drug-Related Crime
April 13 David Stea, Texas State-San Marcos Borders and THE BORDER: US - Mexico Borderlands in Perspective
April 20 NO COLLOQUIUM AAG Meeting-San Francisco
April 27 NO COLLOQUIUM FACULTY MEETING

Fall 2006
Sep. 15 NO COLLOQUIUM FACULTY MEETING
Sep. 29 Trevor Barnes, University of British Columbia The Geographical State: The Development of Canadian Geography
Oct. 6 Roundtable: Drs. Bian and Mark, grad students The Grant-Writing Process
Nov. 3 Roundtable: Geography Professors & Grad Students Navigating through UB's Geography Program(s)
Nov. 10 Stephen Walsh, UNC-Chapel Hill

Mapping and Modeling Deforestation Patterns and Land Use/Land Cover Dynamics in the Northern Ecuadorian Amazon
Nov. 24 NO COLLOQUIUM

UB CLOSED-THANKSGIVING HOLIDAY
Dec. 1 NO COLLOQUIUM FACULTY MEETING
Dec. 8 NO COLLOQUIUM DEPARTMENT HOLIDAY PARTY

To download a list of previous colloquium speakers from a given semester, please click on the appropriate link below. Note: All documents are in Microsoft Word format.

Please email geog@buffalo.edu for updates to this list.

 

Department of Geography University at Buffalo