TY  - JOUR
AU  - Albright, Thomas P.
AU  - Ode, D.J.
PY  - 2011//
TI  - Monitoring the dynamics of an invasive emergent macrophyte community using operational remote sensing data
JO  - Hydrobiologia
SP  - 469
EP  - 474
VL  - 661
IS  - 1
KW  - accuracy
KW  - accuracy assessment
KW  - Advanced Wide-Field Sensor (AWiFS)
KW  - area
KW  - assessment
KW  - classification
KW  - cluster analysis
KW  - curly pondweed
KW  - data
KW  - dynamics
KW  - error
KW  - field data
KW  - Global Positioning System (GPS)
KW  - GPS
KW  - image
KW  - imagery
KW  - journal articles
KW  - lake
KW  - Landsat
KW  - large area
KW  - macrophyte
KW  - monitoring
KW  - North America
KW  - operational
KW  - photography
KW  - pixel
KW  - Potamogeton crispus
KW  - remote sensing
KW  - remote sensing imagery
KW  - satellite
KW  - satellite image
KW  - satellite imagery
KW  - satellite remote sensing
KW  - South Dakota
KW  - United States
KW  - USA
KW  - water
KW  - water bodies
KW  - water quality
N2  - Potamogeton crispus L. (curly pondweed) is a cosmopolitan aquatic macrophyte considered invasive in North America and elsewhere. Its range is expanding and, on individual water bodies, its coverage can be dynamic both within and among years. In this study, we evaluate the use of free and low-cost satellite remote sensing data to monitor a problematic emergent macrophyte community dominated by P. crispus. Between 2000 and 2006, we acquired eight satellite images of 24,000-ha Lake Sharpe, South Dakota (USA). During one of the dates for which satellite imagery was acquired, we sampled the lake for P. crispus and other emergent macrophytes using GPS and photography for documentation. We used cluster analysis to assist in classification of the satellite imagery and independently validated results using the field data. Resulting estimates of emergent macrophyte coverage ranged from less than 20 ha in 2002 to 245 ha in 2004. Accuracy assessment indicated 82% of image pixels were correctly classified, with errors being primarily due to failure to identify emergent macrophytes. These results emphasize the dynamic nature of P. crispus-dominated macrophyte communities and show how they can be effectively monitored over large areas using low-cost remote sensing imagery. While results may vary in other systems depending on water quality and local flora, such an approach could be applied elsewhere and for a variety of macrophyte communities.
SN  - http://dx.doi.org/10.1007/s10750-010-0537-8
UR  - http://dx.doi.org/10.1007/s10750-010-0537-8
N1  - exported from refbase (http://eros.usgs.gov/refbase/show.php?record=24058), last updated on Fri, 21 Sep 2012 12:00:47 -0500
ID  - Albright+Ode2011
ER  -