Coupling fine-scale root and canopy structure using ground-based remote sensing

Hardiman, Brady S.; Gough, Christopher M.; Butnor, John R.; Bohrer, Gil; Detto, Matteo; Curtis, Peter S.

doi:10.3390/rs9020182

Title: Coupling fine-scale root and canopy structure using ground-based remote sensing

Journal Article · Tue Feb 21 00:00:00 UTC 2017 · Remote Sensing

DOI: https://doi.org/10.3390/rs9020182 · OSTI ID:1358427

^[1]; Gough, Christopher M. ^[2]; Butnor, John R. ^[3]; Bohrer, Gil ^[4]; Detto, Matteo ^[5]; Curtis, Peter S. ^[4]

Purdue Univ., West Lafayette, IN (United States); The Ohio State Univ., Columbus, OH (United States); Perdue University
Virginia Commonwealth Univ., Richmond, VA (United States)
USDA Forest Service, Burlington, VT (United States)
The Ohio State Univ., Columbus, OH (United States)
Smithsonian Tropical Research Institute, Miami, FL (United States)

Ecosystem physical structure, defined by the quantity and spatial distribution of biomass, influences a range of ecosystem functions. Remote sensing tools permit the non-destructive characterization of canopy and root features, potentially providing opportunities to link above- and belowground structure at fine spatial resolution in functionally meaningful ways. To test this possibility, we employed ground-based portable canopy LiDAR (PCL) and ground penetrating radar (GPR) along co-located transects in forested sites spanning multiple stages of ecosystem development and, consequently, of structural complexity. We examined canopy and root structural data for coherence (i.e., correlation in the frequency of spatial variation) at multiple spatial scales 10 m within each site using wavelet analysis. Forest sites varied substantially in vertical canopy and root structure, with leaf area index and root mass more becoming even vertically as forests aged. In all sites, above- and belowground structure, characterized as mean maximum canopy height and root mass, exhibited significant coherence at a scale of 3.5–4 m, and results suggest that the scale of coherence may increase with stand age. Our findings demonstrate that canopy and root structure are linked at characteristic spatial scales, which provides the basis to optimize scales of observation. Lastly, our study highlights the potential, and limitations, for fusing LiDAR and radar technologies to quantitatively couple above- and belowground ecosystem structure.

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Research Organization:: Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Biological and Environmental Research (BER) (SC-23)

Grant/Contract Number:: SC0009988

OSTI ID:: 1358427

Journal Information:: Remote Sensing, Journal Name: Remote Sensing Journal Issue: 2 Vol. 9; ISSN 2072-4292

Publisher:: MDPICopyright Statement

Country of Publication:: United States

Language:: English

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Title: Coupling fine-scale root and canopy structure using ground-based remote sensing

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