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Silva, B.; Roos, K.; Fries, A.; Rollenbeck, R.; Beck, E. & Bendix, J. (2014): Mapping Two Competing Grassland Species from a Low-Altitude Helium Balloon. IEEE Journal of selected topics in applied earth observations and remote sensing 7(7), 3038 - 3049
DOI: http://dx.doi.org/10.1109/JSTARS.2014.2321896.

Resource Description

Title: Mapping Two Competing Grassland Species from a Low-Altitude Helium Balloon
FOR816dw ID: 1280
Publication Date: 2014-03-08
License and Usage Rights: PAK 823-825 data user agreement. (www.tropicalmountainforest.org/dataagreementp3.do) http://www.tropicalmountainforest.org/dataagreement.do
Resource Owner(s):
Individual: Brenner Silva
Contact:
Individual: Kristin Roos
Contact:
Individual: Andreas Fries
Contact:
Individual: Ruetger Rollenbeck
Contact:
Individual: Erwin Beck
Contact:
Individual: Jörg Bendix
Contact:
Abstract:
This paper describes a method of low-altitude remote
sensing in combination with in situ measurements (leaf area, spectroscopy, and position) to monitor the postfire canopy recovery of two competing grassland species. The method was developed in the Andes of Ecuador, where a tethered balloon with a digital camera was deployed to record a time series of very high spatial resolution
imagery ( nominal resolution = 2cm ) of an experimental plot covered by two competing species: 1) the pasture grass, Setaria sphacelata; and 2) the invasive southern bracken, Pteridium arachnoideum. Image processing techniques were combined to solve geometric issues and construct high-quality mosaics for image classification. The semiautomatic and object-oriented classification method was based on geometrical and textural attributes of image segments and showed promising results for detecting the invasive bracken fern in Setaria pastures (performance by area under the curve, AUC = 0.88). Valuable insights are given into vegetation monitoring applications using unmanned aerial vehicles, which produces a time series of species-specific maps, including foliage projective cover (FPC) and leaf area index (LAI). This new method constitutes an important and accessible tool for ecological investigations of competing species in pastures and validation of remote sensing information on mountain environments.
Additional Infos:
This article has been accepted on 8-3-2014 for inclusion in a future issue of this journal.
Keywords:
| bracken | pasture | land cover | LAI | remote sensing | abandoned pasture | burning | Bracken fern |
Literature type specific fields:
ARTICLE
Journal: IEEE Journal of selected topics in applied earth observations and remote sensing
Volume: 7
Issue: 7
Page Range: 3038 - 3049
Publisher: IEEE
Metadata Provider:
Individual: Brenner Silva
Contact:
Online Distribution:
Download File: http://www.tropicalmountainforest.org/publications.do?citid=1280

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