1 / 24

Sanpisa Sritrairat Lamont-Doherty Earth Observatory March 21, 2006

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.

colm
Download Presentation

Sanpisa Sritrairat Lamont-Doherty Earth Observatory March 21, 2006

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  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

More Related