Main Title |
Near Infrared Aerial Photo-Detection of 'Zostera japonica' Communities in Pacific Northwest Estuarine Intertidal Habitats. |
Author |
Specht, D. T. ;
Young, D. R. ;
Clinton, P. J. ;
|
CORP Author |
National Health and Ecological Effects Research Lab., Newport, OR. ;OAO Corp., Newport, OR. |
Publisher |
1999 |
Year Published |
1999 |
Report Number |
EPA/600/A-00/027; |
Stock Number |
PB2000-107419 |
Additional Subjects |
Habitats ;
Estuaries ;
Marine plants ;
Coastal environment ;
Sea grasses ;
Biotic communities ;
Environmental mapping ;
Aquatic ecosystems ;
Aerial photography ;
Ecology ;
Maps ;
Vegetation ;
Oregon ;
Plants ;
Marine biology ;
Marine ecosystems ;
Pacific Northwest Region(United States)
|
Holdings |
Library |
Call Number |
Additional Info |
Location |
Last Modified |
Checkout Status |
NTIS |
PB2000-107419 |
Some EPA libraries have a fiche copy filed under the call number shown. |
|
07/26/2022 |
|
Collation |
12p |
Abstract |
Near infrared color aerial photography (-1:7200) of Yaquina Bay, Oregon, flown at minus tides during summer months of 1997 was used to produce digital stereo ortho-photographs covering tidally exposed eelgrass habitat. GIS analysis, coupled with GPS positioning of ground-truth data detected Zostera Japonica communities (non-indigenous eelgrass), which are physically separated by elevation in this and similar Pacific North-west coastal estuaries from Zostera marina (native eelgrass) communities. The non-indigenous Z, japonica typically occurs at or near mean high water while native Z, marina is restricted to -0.7 m above mean low water and below. Recognition of Z, japonica patches from adjacent bare sediment and emergent beach or marsh grasses was aided by combining specifically tailored detection algorithms and 'heads up' digitizing with digital bathymetry. Further progress in algorithm development should allow areal delineation, mapping and change analysis. |
Supplementary Notes |
Presented at the International Conference on Remote Sensing for Marine and Coastal Environments (6th), Charleston, SC., May 1-3, 2000. Prepared in cooperation with OAO Corp., Newport, OR. |
Availability Notes |
Product reproduced from digital image. Order this product from NTIS by: phone at 1-800-553-NTIS (U.S. customers); (703)605-6000 (other countries); fax at (703)605-6900; and email at orders@ntis.fedworld.gov. NTIS is located at 5285 Port Royal Road, Springfield, VA, 22161, USA. |
Category Codes |
47D; 57H; 68D |
NTIS Prices |
PC A03/MF A01 |
Primary Description |
600/02 |
Document Type |
NT |
Cataloging Source |
NTIS/MT |
Control Number |
029900540 |
Origin |
NTIS |
Type |
CAT |