Marsh canopy leaf area and orientation calculated for improved marsh structure mapping
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Abstract
An approach is presented for producing the spatiotemporal estimation of leaf area index (LAI) of a highly heterogeneous coastal marsh without reliance on user estimates of marsh leaf-stem orientation. The canopy LAI profile derivation used three years of field measured photosynthetically active radiation (PAR) vertical profiles at seven S. alterniflora marsh sites and iterative transform of those PAR attenuation profiles to best-fit light extinction coefficients (KM). KM sun zenith dependency was removed obtaining the leaf angle distribution (LAD) representing the average marsh orientation and the LAD used to calculate the LAI canopy profile. LAI and LAD reproduced measured PAR profiles with 99% accuracy and corresponded to field documented structures. LAI and LAD better reflect marsh structure and results substantiate the need to account for marsh orientation. The structure indexes are directly amenable to remote sensing spatiotemporal mapping and offer a more meaningful representation of wetland systems promoting biophysical function understanding.
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | Marsh canopy leaf area and orientation calculated for improved marsh structure mapping |
| Series title | Photogrammetric Engineering and Remote Sensing |
| DOI | 10.14358/PERS.81.10.807 |
| Volume | 81 |
| Issue | 10 |
| Year Published | 2015 |
| Language | English |
| Publisher | American Society for Photogrammetry and Remote Sensing |
| Contributing office(s) | Wetland and Aquatic Research Center |
| Description | 10 p. |
| First page | 807 |
| Last page | 816 |
| Online Only (Y/N) | N |
| Additional Online Files (Y/N) | N |
| Google Analytic Metrics | Metrics page |