Spatial‐temporal monitoring of forest disease dynamics

Liu et al. 2006. Remote Sensing of Environment. Traditional mapping approaches using per-pixel, single-date image classifications have not generated consistently satisfactory results. Incorporation of spatial–temporal contextual information can improve these results. In this paper, we propose a spatial–temporally explicit algorithm to classify individual images using the spectral and spatial–temporal information derived from multiple co-registered images.

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Geospatial informatics for management of Sudden Oak Death

Kelly, et al. 2004. Photogrammetric Engineering and Remote Sensing. For a geographer viewing the early days of the SOD epidemic, there were several intriguing spatial aspects on which a monitoring system could be built, including: 1) disease impact was clearly visible at multiple spatial scales, making remote sensing useful in the monitoring process; 2) disease spread and consequent mortality were patchy at landscape scales, making spatial analysis useful; 3) the disease appeared to be spatially regulated, making accurate spatial data collected using GPS and maintained and mapped using GIS critical; and 4) public awareness and concern about the disease were high, and public participation was needed in the monitoring/tracking process, making webGIS and cartography immediately useful tools for information distribution and management assistance.

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Interpretation of scale in paired quadrat variance methods

Guo and Kelly. 2004. Journal of Vegetation Science. Previous interpretations of the variance plot of paired quadrat variance method (PQV) have been incomplete; and in this study was to clarify the interpretation of PQV, and to shed additional light on how different quadrat variance methods can be used, in concert, to measure scale in transect data.

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Mitigation-related changes in vernal pool edaphic settings

Wacker and Kelly. 2004. Wetlands Ecology and Management. We analyzed past mitigation practices in two rapidly growing counties in California’s Great Central Valley to determine if mitigation procedures are re-arranging the vernal pool landscape by substituting more common or less ecologically significant pool types (as defined by soil type and geomorphology) for rarer or ecologically richer pool types.

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Landscape dynamics of the spread of Sudden Oak Death

Kelly and Meentemeyer. 2002. Photogrammetric Engineering and Remote Sensing. We present a landscape-scale We present a landscape-scale study of the spatio-temporal dynamics of oak mortality using second-order spatial point-pattern analysis techniques and classification trees.

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Seagrass landscape pattern and hydrodynamic setting

Fonseca, et al. 2002. Ecological Applications. We examined the coherence of predictions of seagrass cover and ecological attributes of temperate, mixed-species seagrass derived from two common sampling techniques, (video) line transect (commonly used by biologists) and grid-sampled surveys (often used in remote sensing).

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