ABoVE: White Spruce Photosynthetic and Leaf Traits, Alaska and New York, 2017

Description

This dataset provides measurements of gas exchange (light response curves, Kok curves and ACi curves), leaf traits (carbon, nitrogen, and specific leaf area), leaf pigments (Chlorophyll a, Chlorophyll b and Carotenoids), the photochemical reflectance index (PRI), and average photosynthetic photon flux density as collected from hemispherical photographs. Data were collected on white spruce trees (Picea glauca (Moench) Voss) growing at the northern edge of the species' distribution in Alaska and at the southern edge of the species' distribution in Black Rock Forest (BRF), New York. Measurements were taken at high and low canopy positions on each tree at both sites during the 2017 growing season (2017-06-19 to 2017-07-20). Gas exchange, leaf trait, pigment and spectral measurements were obtained using a portable photosynthesis system (LI-6800, LI-COR, Lincoln, NE). Photochemical reflectance index was determined using a spectroradiometer, and hemispherical photographs were taken with a digital camera. These data were collected to better understand how vertical canopy gradients in photosynthetic physiology change from the southernmost to the northernmost range extremes of white spruce. The data are provided in comma-separated value (CSV) format.

Resources

Name Format Description Link
21 ORNL DAAC Data Set Documentation https://daac.ornl.gov/ABOVE/guides/WhiteSpruce_Leaf_Traits_Alaska.html
33 ABoVE: White Spruce Photosynthetic and Leaf Traits, Alaska and New York, 2017: WhiteSpruce_Leaf_Traits_Alaska.pdf https://data.ornldaac.earthdata.nasa.gov/public/above/WhiteSpruce_Leaf_Traits_Alaska/comp/WhiteSpruce_Leaf_Traits_Alaska.pdf
21 Search results for publications that cite this dataset by its DOI. https://scholar.google.com/scholar?q=10.3334%2FORNLDAAC%2F2124
21 This link allows direct data access via Earthdata login https://daac.ornl.gov/above/WhiteSpruce_Leaf_Traits_Alaska/
21 Data set Landing Page DOI URL https://doi.org/10.3334/ORNLDAAC/2124
21 ABoVE project site https://above.nasa.gov
34 Ratios of (a) maximum rate of carboxylation to respiration at 25 degrees C from Griffin et al. (2022) (Vcmax /R25 ) and (b) maximum electron transport rate to respiration at 25 degrees C from Griffin et al. (2022) (Jmax /R25 ) of white spruce from high and low canopy positions at the Forest Tundra Ecotone (FTE, blue), Alaska, and Black Rock Forest (BRF, green), New York. Boxplots show the median and first and third quartiles. Whiskers display the range of groups with individual points representing outliers falling outside 1.5 times the interquartile range. Different letters represent significant differences between locations and canopy positions. https://daac.ornl.gov/ABOVE/guides/WhiteSpruce_Leaf_Traits_Alaska_Fig1.png

Tags

  • ecosystems
  • biosphere
  • vegetation
  • ecological-dynamics
  • earth-science

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