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The effect of microphytes on the spectral reflectance of vegetation in semiarid regions
Year:
1996
Source of publication :
Remote Sensing of Environment
Authors :
Zaady, Eli
;
.
Volume :
57
Co-Authors:
Karnieli, A., Ben Gurion University of the Negev, Beer Sheva, Israel
Shachak, M., Ben Gurion University of the Negev, Beer Sheva, Israel
Tsoar, H., Ben Gurion University of the Negev, Beer Sheva, Israel
Zaady, E., Ben Gurion University of the Negev, Beer Sheva, Israel
Kaufman, Y., NASA / Goddard Space Flight Center, Greenbelt, MD, United States
Danin, A., Hebrew University, Jerusalem, Israel
Porter, W.
Facilitators :
From page:
88
To page:
96
(
Total pages:
9
)
Abstract:
The normalized difference vegetation index (NDVI), which is derived from satellite sensor images, is widely used as a measure of vegetation and ecosystem dynamics, change in land use, desertification, and climatic change processes on a regional or global scale. Surprisingly, in semiarid regions, relatively high values of NDVI were measured in landscapes where little, if any, photosynthetic activity of higher plants exists. We tested the hypothesis that the high NDVI values may be caused by the photosynthetic activity of microphytes (lower plants), consisting of mosses, lichens, algae, and cyanobacteria, which cover most of the rock and soil surfaces in semiarid regions. We found that the spectral reflectance curves of lower plants can be similar to those of the higher ones and their derived NDVI values can be as high as 0.30 units. We conclude that, in semiarid environments, the reflectance of lower plant communities may lead to misinterpretation of the vegetation dynamics and overestimation of ecosystem productivity.
Note:
Related Files :
climate change
desertification
ecosystems
photosynthesis
remote sensing
Rocks
Soils
Show More
Related Content
More details
DOI :
10.1016/0034-4257(95)00209-X
Article number:
Affiliations:
Database:
Scopus
Publication Type:
article
;
.
Language:
English
Editors' remarks:
ID:
28792
Last updated date:
02/03/2022 17:27
Creation date:
17/04/2018 00:41
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Scientific Publication
The effect of microphytes on the spectral reflectance of vegetation in semiarid regions
57
Karnieli, A., Ben Gurion University of the Negev, Beer Sheva, Israel
Shachak, M., Ben Gurion University of the Negev, Beer Sheva, Israel
Tsoar, H., Ben Gurion University of the Negev, Beer Sheva, Israel
Zaady, E., Ben Gurion University of the Negev, Beer Sheva, Israel
Kaufman, Y., NASA / Goddard Space Flight Center, Greenbelt, MD, United States
Danin, A., Hebrew University, Jerusalem, Israel
Porter, W.
The effect of microphytes on the spectral reflectance of vegetation in semiarid regions
The normalized difference vegetation index (NDVI), which is derived from satellite sensor images, is widely used as a measure of vegetation and ecosystem dynamics, change in land use, desertification, and climatic change processes on a regional or global scale. Surprisingly, in semiarid regions, relatively high values of NDVI were measured in landscapes where little, if any, photosynthetic activity of higher plants exists. We tested the hypothesis that the high NDVI values may be caused by the photosynthetic activity of microphytes (lower plants), consisting of mosses, lichens, algae, and cyanobacteria, which cover most of the rock and soil surfaces in semiarid regions. We found that the spectral reflectance curves of lower plants can be similar to those of the higher ones and their derived NDVI values can be as high as 0.30 units. We conclude that, in semiarid environments, the reflectance of lower plant communities may lead to misinterpretation of the vegetation dynamics and overestimation of ecosystem productivity.
Scientific Publication
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