Sea ice algae, a major food source for herbivorous plankton and benthos in the eastern Bering Sea. Rolf Gradinger, Bodil Bluhm. Katrin Iken (UAF) Hypotheses.

Slides:

Advertisements

Similar presentations

Marine Ecosystems and Food Webs. Carbon Cycle Marine Biota Export Production.

Advertisements

Antarctic Summer Scientific exploration of the Antarctic Peninsula.

Plankton Marine life is classified into three groups: Plankton, Nekton, and Benthos Plankton Nekton Benthos.

Ocean Water and Ocean Life

15. 2 Diversity of Ocean Life & 15.3 Oceanic Productivity

Marine Habitats: Physical Conditions of Marine Life.

Fitting snow crabs (Chionoecetes opilio) into the benthic food web of the central Alaskan Beaufort Sea Lauren M. Divine*, Katrin Iken, and Bodil A. Bluhm.

THE STUDY OF BIOGEOCHEMICAL CYCLES AND RELATED SEDIMENT FLUXES: THE IOC-BSRC PROJECT PROPOSAL Could such a project idea be developed into an EC FP Integrated.

2014 NETCARE AMUNDSEN CRUISE Ocean-Atmosphere Interactions Michel Gosselin University of Quebec at Rimouski Maurice Levasseur Laval University Highly qualified.

LIVE INTERACTIVE YOUR DESKTOP Thursday, December 3, 2009 Relevance of Climate Change for the Arctic Marine Biological System Presented by: Dr.

AS Year 13 SCIENCE. Ocean systems – course topics 1. Ocean composition 2. Ocean circulation 3. The carbon cycle 4. Transport matter, energy – heat,

Potential Approaches Empirical downscaling: Ecosystem indicators for stock projection models are projected from IPCC global climate model simulations.

Meibing Jin, Clara Deal, Jia Wang (IARC) K-H Shin (IARC, Korea) Nori Tanaka (IARC, JAMSTEC) T. Whitledge, S-H Lee, and R Gradinger (IMS) Arctic Modeling.

WP12. Hindcast and scenario studies on coastal-shelf climate and ecosystem variability and change Why? (in addition to the call text) Need to relate “today’s”

Edward J. Tarbuck & Frederick K. Lutgens

Plankton Marine life is classified into three groups: Plankton, Nekton, and Benthos Plankton Nekton Benthos.

Marine Chemistry and Biological Oceanography 海洋化學與生物海洋.

General Scheme for Working Group Objectives Physiological/Biogeochemical Responses Organisms and Communities Ecosystem Effects How would changes in populations.

“The open ocean is a biological desert.”. Primary Production Global chlorophyll concentrations for Oct

OCEANIC LIFE ZONES.

Ocean Water and Ocean Life

The Diversity of Ocean Life

The Ocean’s primary Productivity

2nd Reminder: Midterm 1 is this Friday February 1st Midterm 1 is 15% of your final grade Midterm 1 is 15% of your final grade It covers all lectures through.

Page 1 CONSULTANCY AND RESEARCH IN AQUACULTURE AND THE AQUATIC ENVIRONMENT A Company in the NIVA-group Methodology for Environmental monitoring of aquaculture.

Ecosystems and communities 4.3 – 4.5

Open Oceans: Pelagic Ecosystems II

An Ecosystem-Level Study of Florida’s Major Spring Systems Robert L. Knight, Ph.D. Jackson Blue Springs Working Group Tuesday, January 13, 2009.

An Integrated Ecosystem Study of the

Students collect a water sample. An amphipod that couldn’t escape our nets. Figure 1: This screenshot shows the controlling page for running model animations.

Arctic Ocean Diversity ArcOD Regional focus – three environments: biodiversity in the Arctic sea ice, water column and sea floor from the shallow shelves.

Climate Change Impact on Freshwater Ecosystems in Latvia Gunta Spriņģe, Institute of Biology, University of Latvia.

Inputs to shelf seas- an overview Materials are introduced into coastal and shelf seas primarily through: rivers, atmosphere, groundwaters, ice processes.

Some Thoughts on Ecology

SEASONAL CHANGES IN BENTHIC FLUXES AND NET ECOSYSTEM METABOLISM IN THE RIA DE VIGO (NW SPAIN) F. Alonso-Pérez, Carmen G. Castro, Zuñiga, D., B. Arbones.

2012 Arctic Report Card Tracking recent environmental changes Martin Jeffries 1, J. E. Overland 2, J. A. Richter-Menge 3, and N. N. Soreide 2 1 Office.

Nature’s Density Column. Nature creates its own density column Example: The Bering Sea As you discovered in your experiment, when ice melts it forms a.

Microalgae - definitions ICE ALGAE Microalgae that live within the sea ice attached to ice crystals, or associated with the undersurface of the ice as.

Title page. “ Possible Geocape Capabilities Measurements of Diurnal Variability with Requirements of hours to days……………. “

Mesozooplankton-microbial food web interactions in a climatically changing sea ice environment Evelyn & Barry Sherr, Oregon State University Carin Ashjian,

Open Oceans: Pelagic Ecosystems III. Comparing the makeup of water and plankton Mean Elemental Ratios of N, and P Organisms: 16.0N / 1P Sea Water: 14.7N.

Response of benthic algae communities to nutrient enrichment in agricultural streams: Implications for establishing nutrient criteria R.W. Black 1, P.W.

15 Chapter 15 Ocean Water and Ocean Life The Composition of Seawater  Salinity is the total amount of solid material dissolved in water.  typically.

Ocean Water Chapter 20.

BIOMES LAKES RIVERS OCEANS WETLANDS Created by Jill Lenten.

*Minagawa M, Usui T, Miura Y, Nagao S, Irino T, Kudo I, and Suzuki K, Graduate School of Environmental Science, Hokkaido University, Sapporo ,

Chapter 3 Part 2. Do Now 1) What is a thermocline 2) How does the graph look? (where are the axis and how are they labeled?) 3) What information do we.

Exploring Biological Oceanography Beth Trowbridge & Sheryl Sotelo.

Pelagic C:N:P Stoichiometry in a Eutrophied Lake: Response to a

The Subtidal1 Life on the Continental Shelf. The Subtidal2 The Continental Shelf.

THE FOOD WEB DO NOW: What do you think is the most important

Collaborative Research on Sunlight and the Arctic Atmosphere-Ice-Ocean System (AIOS) Hajo Eicken Univ. of Alaska Fairbanks Kathy Jones CRREL Bonnie Light.

Ocean Water and Life. Salt in the Ocean Salinity is the total amount of solid material dissolved in water. Salinity is expressed by the amount of salt.

SeaWiFS Highlights July 2002 SeaWiFS Celebrates 5th Anniversary with the Fourth Global Reprocessing The SeaWiFS Project has just completed the reprocessing.

Salinity Salinity is the total amount of solid material dissolved in water. Because the proportion of dissolved substances in seawater is such a small.

Chapter 15. Salinity Chemical weathering on land creates chemicals picked up by freshwater and delivered to the ocean Mainly sodium chloride Chemicals.

EARTH SCIENCE Prentice Hall EARTH SCIENCE Tarbuck Lutgens 

EEMB 595P Winter 2011 SBC LTER Research Seminar Instructor: S. Holbrook Time :Wednesdays noon-1 pm Room: MSRB auditorium 5-JanOrganizational meeting SBC.

Reference: Ji, R., M. Jin, Ø. Varpe, Sea ice phenology and timing of primary production pulses in the Arctic Ocean. Global Change Biology. 19:

Introduction Food-web structure and trophic dynamics are critical to our understanding of ecosystem functioning and stability and can be used as indicators.

The Life Inside Sea Ice Guest Scientists Andrew Juhl and Craig Aumack Originally presented 14 Jan 2012

Zooplankton biogeography as a measure of oceanographic change in Canada Basin (Arctic) Brian Hunt 1, John Nelson 2, Fiona McLaughlin 2, Eddy Carmack 2.

Ocean Water & Ocean Life

15.1 The Composition of Seawater

Plankton Ecology: Primary production, Phytoplankton and Zooplankton

OCEAN WATER AND OCEAN LIFE

The Diversity of Ocean Life

Relationship Between NO3 and Salinity:

Typology and classification of coastal waters in Estonia

Presentation transcript:

Sea ice algae, a major food source for herbivorous plankton and benthos in the eastern Bering Sea. Rolf Gradinger, Bodil Bluhm. Katrin Iken (UAF) Hypotheses (H1) Sea ice algal communities are the main sources of algal biomass and primary productivity in the BEST study area in spring during periods of ice cover. (H2) The accumulation of ice algal biomass is following the seasonal and regional gradients in light and nutrient availability. (H3) Release of ice-derived particulate organic material (POM) occurs mainly during periods of ice melt. (H4) The carbon stable isotope ratio (  13 C) of sea ice POM differs from pelagic material. (H5) The  13 C ratio can be used to trace the sea ice-derived material through the Bering Sea food web.

Objectives (1) measure chemical (nutrients, salinity) and physical parameters (ice thickness, snow depth, ice temperature, light) of sea ice and the under-ice water layer; (2) describe and quantify the temporal and spatial variability of ice algal parameters (algal pigments, taxonomic composition, size spectra, POC, PON,  13 C ratio) (3) quantify the primary production of ice algae (using labeled precursors); (4) quantify the same parameters as in objectives (1) and (2) for the phytoplankton immediately under the sea ice; and quantify algal pigments and  13 C stable isotope ratio in benthic sediments; (5) determine characteristics of sedimenting particles (species/particle type, algal pigments, PON, POC,  13 C and  15 N) by deploying drifting short term (<24hours) sediment traps under Bering Sea ice

Approach - 3 expeditions, four participants, 15 stations each - 3 ice floes per station, one with sediment traps (>12 hours) - Zodiak and/or from ice breaker - plankton nets, water column (CTD), van Veen grabs BEST study area and prospective sampling grid. For each process station (green boxes on map), we will ideally sample several ice floes (I), as well as water column (P) and benthos (B) to obtain biological and physical data.

Turnover rates Experiments during expedition/in Fairbanks (climate control rooms) one pelagic (copepod), one benthic species (amphipod) Outreach - a project-specific web page up be end of Bering Sea school district: village of Golovin - Martin L. Olson School in Golovin- field class with students in Nome in fall 2007? - Fairbanks High School Science Seminar series in host a Teacher-at-sea in 2009? - interest from German TV team to participate in expedition in 2008 (two people, 2 weeks) - Sea ice class (March 2008) in Barrow, Alaska (anyone interested?)