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Curatola Fern&aacute;ndez, G.F.; Silva, B.; Adams, J.; Thies, B. &amp; Bendix, J. (2013): <b>Bracken fern frond status classification in the Andes of southern Ecuador: combining multispectral satellite data and field spectroscopy</b>. <i>International Journal of Remote Sensing</i> <b>34</b>, 7020-7037.

Resource Description

Title: Bracken fern frond status classification in the Andes of southern Ecuador: combining multispectral satellite data and field spectroscopy
FOR816dw ID: 1243
Publication Date: 2013-07-03
License and Usage Rights: FOR816 data user agreement: www.tropicalmountainforest.org/dataagreement.do
Resource Owner(s):
Individual: Giulia F. Curatola Fernández
Contact:
Individual: Brenner Silva
Contact:
Individual: Julia Adams
Contact:
Individual: Boris Thies
Contact:
Individual: Jörg Bendix
Contact:
Abstract:
In the anthropogenic fire-disturbed ecosystem of the San Francisco Valley in the Andes of southeastern Ecuador, dense stands of an aggressive invasive weed, the southern bracken fern (Pteridium arachnoideum and Pteridium caudatum), dominate the landscape. To secure sustainable land management in the region, a comprehensive understanding of bracken spatial-distribution patterns and life cycle dynamics is crucial. We investigated the possibility of detecting bracken-infested areas and frond status (live, fungi-infected, and dead) by means of a high-resolution QuickBird scene from October 2010 and spectral signatures based on field spectroscopy. After image pre-processing, a two-step classification procedure first delineates the bracken-infested area by means of a maximum-likelihood hard classification. The probability-guided unmixing classifier with field-derived end-members is applied in the second step to obtain the fractional cover of the different frond statuses per pixel. The results showed that the areas infested by bracken could be distinguished from the other land-cover classes with high accuracy (overall accuracy of 0.9973). Also, the three frond statuses could be accurately classified at the sub-pixel level. The ‘dead’ class was the dominant frond status at the time of image acquisition (October 2010). We conclude that the extreme dry spell in October 2010 was particularly responsible for this dominance.
Keywords:
| Bracken fern | Field spectroscopy | Southern Ecuador | QuickBird | Frond status | Soft classification |
Literature type specific fields:
ARTICLE
Journal: International Journal of Remote Sensing
Volume: 34
Page Range: 7020-7037
Publisher: Taylor & Francis
ISSN: 1366-5901
Metadata Provider:
Individual: Giulia F. Curatola Fernández
Contact:
Online Distribution:
Download File: http://www.lcrs.de/publications.do?citid=1243


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