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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

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

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

Scientists sampling at Columbia River LMER 1

Slide reads- "Columbia River LMER, Deployment of Owen (sp?) Tube; Sampling Aggregates"

Created: 1991-07

Marine ecology lab at the Ecosystems Center

Marine ecology lab at the Ecosystems Center of the Marine Biological Laboratory.

Researcher using a computer at the Ecosystems Center

Researcher using a computer at the Ecosystems Center. Data of photo unknown.

Centrifuge Room and Knievson, Image #4

Man standing in front of large centrifuge machines. View 3

Created: 1951

Centrifuge Room and Knievson, Image #3

Man standing in front of large centrifuge machines. View 2

Created: 1951

Centrifuge Room and Knievson, Image #2

Man standing in front of large centrifuge machines. View 1

Created: 1951

Centrifuge Room and Knievson, Image #1

Man using large centrifuge machine.

Created: 1951

Chemical and glassware department, Image #15

View of stocked shevles in the MBL Chem Room.

Created: 1951

Chemical and glassware department, Image #14

Man looking through shelves of chemicals in MBL Chem Room

Created: 1951

Chemical and glassware department, Image #13

Man preparing chemicals at bench of MBL Chem Room.

Created: 1951

Chemical and glassware department, Image #11

Interior of MBL Chem room showing stocked shelves. One woman standing and one man seated at benches.

Created: 1951

Chemical and glassware department, Image #12

Man filling up glass jug from large barrel of alcohol.

Created: 1951

Chemical and glassware department, Image #10

Four people working around a bench in the MBL Chem Room.

Created: 1951

Chemical and glassware department, Image #9

Woman working at bench in MBL Chem Room. Man in background holding glassware.

Created: 1951

Chemical and glassware department, Image #8

Man pouring liquid from bottle into test tubes in MBL Chem Room

Created: 1951