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An Evaluation of Pollen, Spores and Sediment Fluxes to Hudson River Wetlands. Sanpisa Sritrairat Lamont-Doherty Earth Observatory March 21, 2006. Outline. HRERR Sites. Regional vs. Local Pollen Changes in Sedimentation Pattern Organic Inorganic. Hudson River. Mohawk River.

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Sanpisa Sritrairat Lamont-Doherty Earth Observatory March 21, 2006


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    1. An Evaluation of Pollen, Spores and Sediment Fluxes to Hudson River Wetlands Sanpisa Sritrairat Lamont-Doherty Earth Observatory March 21, 2006

    2. Outline HRERR Sites • Regional vs. Local Pollen • Changes in Sedimentation Pattern • Organic • Inorganic Hudson River Mohawk River Albany X Stockport Flat MA Tivoli Bays Iona Island Piermont Marsh

    3. Interpretation of Pollen and Spores Profile 0- 10- 20- 30- 40- 50- 60- 70- 80- 90- 100- LIA? Depth (cm) MDW? Tivoli North Bay Pollen and Spores Percent

    4. Pollen and Spores Fate • Local (1) • Aerial distant transport (2) • Up or down the river (3) • Erosion (4) • Production Rate 2 1 3 4

    5. Methods: Pollen and Spore Fluxes Hudson River • Monthly Water Sample • Filtration Waterford Mohawk River Troy Albany X Stockport Flat MA Tivoli Bays Iona Island Piermont Marsh New York Harbor and Jamaica Bay

    6. Air Sampling • Funnel, GF/D Filter, and Cotton • Annual Fluxes ------7 cm------- Cotton 2.7 μm GF/D mesh Air Trap

    7. Pollen Analysis • 7-120 μm • Lycopodium Spike • Acetolysis • 300 grains count • 8*12 = 96 water samples • 8 air samples Betula spp.

    8. Problems • Pollen Interpretation • Changes in Sedimentation Pattern • Organic Matter Fluxes • Inorganic Matter Fluxes

    9. Sediment Fluxes North Bay South Bay Tivoli Bays Wetlands

    10. Tivoli vs. Piermont Sediment Tivoli % Carbon Inorganic Mass Organic Mass Depth (m) ~1700 AD Depth (cm) Piermont org. mass (Pederson et al., 2005)

    11. Sediment Fluxes • Chronology • Cs-137 • Pb-210 • Macrofossils AMS Radiocarbon Dating • Sediment and Nutrient Fluxes • Organic vs. Inorganic Betula seeds

    12. Problems • Pollen Interpretation • Changes in Sedimentation Pattern • Organic Matter Fluxes • Inorganic Matter Fluxes

    13. Organic Matter Sources • δ13C and C/N δ13C (‰) -40 -30 -20 -10 0 C-3 C-4 Atm CO2 Terrestrial Plants Marine plants and Algae Plankton, Lacustrine plants, FW plants

    14. C/N Ratio C:N Distribution of Authrothrops (Elser et al., 2000)

    15. Organic Matter Sampling • Leaves, Litter, mud, TSS • Under Major Species i.e. Typha & Invasives • Spatial Variability in a small plot =?

    16. Problems • Pollen Interpretation • Changes in Sedimentation Pattern • Organic Matter Fluxes • Inorganic Matter Fluxes

    17. Inorganic Fraction (Mg,Fe)(SiO3)x(OH)y Ca(Mg, Fe)(SiO3)a(OH)b (Na,Ca)AlSicOd (Mg,Fe)(SiO3)x(OH)y Ca(Mg, Fe)(SiO3)a(OH)b (Na,Ca)AlSicOd Albany Clay CaCO3 CaMg(CO3)2 Sandstone Shale Tivoli Adapted from New York Rock Age, USGS

    18. Handheld XRF Result from Iona

    19. Inorganic Sampling • Elemental Analysis • Spatial Differences within a marsh • Latitudal variations • The 4 marshes • Tributaries TSS and Banks Stony Creek

    20. Implications • Paleoecology Study • Chronology, Sed rate • Land use and wetlands management • Nutrient Fluxes • Nutrient Dynamics

    21. Sedimentation Changes • Sedimentation rate • Determine fluctuations of organic and inorganic matter • (diagram of sed. Changes)

    22. Outline • Background • Pollen and Spore Fluxes • Sediment Fluxes • Importance of the Study