Filters: Tags: change detection (X) > Extensions: Citation (X)

Filters Date Range Past year (0) Past month (0) Past week (0) Past day (0) Custom range... To   Search Types Citation (3) Journal Citation (3) Contacts Dennison, Philip E Duffy, Christopher J Eben H Paxton Ehleringer, James R Glenn, Edward P More... Categories Publication (3) View Results as: JSON ATOM CSV

Remote monitoring of tamarisk defoliation and evapotranspiration following saltcedar leaf beetle attack Tamarisk (Tamarix spp.) has invaded riparian ecosystems throughout the Western United States, including significant portions of riparian ecosystems within U.S. National Parks and Monuments. Recently, the saltcedar leaf beetle (Diorhabda elongata) was released as a tamarisk biocontrol agent. Although initial releases have been monitored, no comprehensive program is currently in place to monitor the rapid spread of Diorhabda that has resulted from numerous subsequent releases by county and state agencies. Long term monitoring of tamarisk defoliation and its impacts on habitat and water resources is needed. This study examines the potential for using higher spatial resolution Advanced Spaceborne Thermal Emission and... Categories: Publication; Types: Citation, Journal Citation; Tags: ASTER, Change detection, Colorado Plateau, Evapotransipration, Insect defoliation, All tags... MODIS, Remote Sensing of Environment, Fewer tags Detecting hydroclimatic change using spatio-temporal analysis of time series in Colorado River Basin Land and water resource development can independently eliminate riparian plant communities, including Fremont cottonwood forest (CF), a major contributor to ecosystem structure and functioning in semiarid portions of the American Southwest. We tested whether floodplain development was linked to river regulation in the Upper Colorado River Basin (UCRB) by relating the extent of five developed land-cover categories as well as CF and other natural vegetation to catchment reservoir capacity, changes in total annual and annual peak discharge, and overall level of mainstem hydrologic alteration (small, moderate, or large) in 26 fourth-order subbasins. We also asked whether CF appeared to be in jeopardy at a regional level.... Categories: Publication; Types: Citation, Journal Citation; Tags: Colorado River Basin, Journal of Hydrology, change detection, pattern classification, principal component analysis, All tags... singular spectrum analysis, Fewer tags Modeling the dynamic habitat and breeding population of Southwestern Willow Flycatcher To aid in the management and conservation of Southwestern Willow Flycatcher (Empidonax traillii extimus, hereafter “Flycatcher�), we developed numerous models of flycatcher breeding habitat at Roosevelt Lake, AZ. For model development and testing, we compiled 10 years of flycatcher territory data that were obtained from intensive fieldwork between 1996 and 2005. We identified riparian vegetation annually in the project area from Landsat Thematic Mapper images, and extracted floodplain features from a digital elevation model. We created a novel class of temporal (i.e., multiyear) variables by characterizing the stability and variability in breeding habitat over a 6-year time interval. We used logistic regression... Categories: Publication; Types: Citation, Journal Citation; Tags: Ecological Modelling, GIS, change detection, dynamic riparian vegetation, population dynamics, All tags... predicted habitat, reservoir management, southwestern willow flycatcher, spatially explicit, Fewer tags