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Spring 1996 Newsletter of the Land Margin Ecosystems Research Program

Contents: "The LMER program today" by John Hobbie; "LMER sites compare utilization of river-borne dissolved organic carbon" by Charles Hopkinson, Jr.; "Workshop developed paradigms on estuarine food web structure" by Linda Deegan; "Residence times workshop links physics and ecology"by Bill Boicourt; "GIS grop asseses nutrient flux calculation methods" by Jack Finn; "Scanfish allows TIES researchers to quickly map shallow estuarine areas"; "Chesapeake Bay site extends work of firs LMER project to higher trophic levels" by

Created: 1996

Fall 1998 Newsletter of the Land Margin Ecosystems Research Program

Contents: "LMER begins transition to LTER program" by John E. Hobbie; "Dominance of particle-attached bacteria in the Columbia River Estuary" by Byron C. Crump, John A. Baross, and Charles A. Simenstad; "Influence of baroclinic pressure gradients on vertical sheer estuarine tidal currents" by Julie Amft and Jackson Blanton; "Seasonal and spatial patterns in stable isotopic composition of Chesapeake Bay food web components" by James D. Hagy and Walter R.

Created: 1998

Example of a simplified nutrient cycle from Ecosystems Center 1979 annual report

Caption reads: "Figure 1. The biotic systems that have built and now maintain the biosphere also influence the cycles of carbon, nitrogen, sulfer, and other elements. The general pattern of movement is a series of exchanges between the atmosphere, the land, and the sea. Human activities worldwide have mobilized significant additional quantities of biotically important substances, including toxins, and have modified the natural cycles."

Created: 1979

A data logger at one of the Ecosystems Center's LTER sites

A Campbell CR21x data logger at one of the Ecosystems Center's LTER sites.

Lee Stuart cottongrass seed in Alaska

Lee Stuart (grad student from San Diego State/UC Davis) collecting Eriophorum (cottongrass) seed, late 1970s. The location is probably along the Elliot Highway north of Fairbanks, Alaska.

Researchers setting up greenhouse experiments at Toolik Lake, Alaska

Researchers setting up an early version of "greenhouse" experiments at Toolik Lake, Alaska.

A Sunday hike in the Brooks Range, Alaska

A Sunday hike in the Brooks Range, Alaska, about 1980-81. The woman is Barbara Lachenbruch (student of Terry Chapin's, Univ Alaska). Behind her is Tom and Ellen (last names unknown), working at Toolik Lake at the time.

Walt Oechel's early system for controlling variables in a field experiment

Walt Oechel's early system for controlling CO2/temperature/water/light in field cuvettes, on the hillside below our fertilizer plots.

Researchers counting seedlings in Alaska

Counting seedlings in small disturbed plots, around 1977-78 in Alaska. Lee Stuart (student, San Diego State/UC Davis) on the left, Pete Tryon (RA, Univ Alaska) and Terry Chapin (Univ Alaska) on the right.

Map of Gaius Shaver's data collection sites in Barrow, Alaska

Map of Gaius Shaver's data collection sites in Barrow, Alaska, from 1973

Created: 1973

Terry Chapin sorting cottongrass tillers in the field at Sagwon, Alaska

Terry Chapin sorting cottongrass tillers in the field at Sagwon, Alaska, late 1970s.

Jim Laundre, Anne Giblin, Gus Shaver, and Knute Nadelhoffer, in a snowstorm at Toolik Lake, July 18, 1984

Left to right: Jim Laundre, Anne Giblin, Gus Shaver, and Knute Nadelhoffer, in a snowstorm at Toolik Lake, July 18, 1984. Jim was then an RA, Anne, Gus, and Knute were Assistant Scientists, all at the Ecosystems Center.

Created: 1984

Note from David Kirchman to Ivan Valiela at the Ecosystems Center

Note reads: "Ivan- You & the MBL Marine Ecology course got me going in this field. Thanks. David Kirchman"

Created: 2013

Winogradsky column used at the Ecosystems Center

This is a Winogradsky column that Joseph Vallino uses in a SES course on Methods in Microbial Ecology. Almost every bacterial metabolic process that occurs on Earth also occurs in these columns that are simply constructed by placing freshwater or marine sediments augmented with a carbon source (such as saw dust) and fertilizer (N and P) in a column and topping it off with either fresh or sea water. Julie Huber is a co-instructor in the course.

Methanotrophic microcosms used at the Ecosystems Center

These are methanotrophic microcosms that are being used to develop and test new approaches to modeling microbial biogeochemistry using thermodynamic approaches (namely, the principle of maximum entropy production).

Ecosystems Center researchers' model of nutrient flows in an estuarine ecosystem

Caption reads: "Figure 4: A diagrammatic model of carbon and nitrogen flow in an estuarine ecosysem that emphasizes inputs of organic carbon and nitrogen and inorganic nutrients from upland watersheds and processing by the estuarine food web. Compartments of the mathematical model are shown in the box. The inorganic nutrients compartment comprises both ammonium and nitrate. The organic matter compartment comprises three distinct components: labile nitrogenous material, labile carbohydrate material and refractory nitrogenous materal."

Created: 1993

Ecosystems Center researchers' figure of element cycles in terrestrial ecosystems

Caption reads: "Figure 3. Major element fluxes within terrestrial ecosystems."

Created: 1986

Brian Fry and Bob Michener at the Ecosystems Center's Mass Spectrometer Lab

Caption reads: "Brian Fry and Bob Michener in the new Mass Spectrometer Laboratory"

Created: 1985

Map of Ecosystems Center researchers' forest watershed fertilizer study in Maine

Caption reads: "Figure 1: The dashed lines mark two catchments (watersheds) at the Bear Brooks Watersheds site in Maine. Both catchments are located on a southeast-facing slope and drained by streams that persist throughout the year (dark lines). The shaded catchment was treated with fertilized labeled with 15N during 1991; the other served as a control. Filled trianges show sampling locations in the fertilized area."

Created: 1992

Simulation of global annual net primary production from Ecosystems Center researchers' Terrestrial Ecosystem Model

Caption reads: "Figure 2. Annual net primary production (NPP) for undisturbed mature vegetation of the earth's ecosystems as determined by the Terrestrial Ecosystem Model (TEM) for current climate at atmosphereic carbon dioxide levels."

Created: 1992

Scientists sampling at Columbia River LMER 3

Slide reads- "Columbia River LMER, John Baross & Charles Simenstad setting up CTD-Pump Profiler in Estuary"

Scientists sampling at Columbia River LMER 2

Slide reads- "Columbia River LMER, Deployment of CTD-Profiling Pump [unreadable] Package During ETM Sampling"

Created: 1991-07