HR: 1340h
AN: B23C-1492    [Abstracts]
TI: Remote Sensing Time Series Analysis of Coupled Impacts of Disturbance and Management on Landscape Carbon Storage in the Okavango Delta, Botswana
AU: * Crews, K
EM: kacm@uts.cc.utexas.edu
AF: University of Texas, Department of Geography 1 University Station, Austin, TX 78712, United States
AU: Neuenschwander, A
EM: amy@csr.utexas.edu
AF: University of Texas, Department of Geography 1 University Station, Austin, TX 78712, United States
AB: Tropical and subtropical savanna processes are largely impacted by both disturbance and disturbance regimes, notably fire and grazing. In the Okavango Delta, Botswana, savanna-grassland ecotones are also influenced by a third type of disturbance/disturbance regime: flooding. The interspersal of seasonal and occasional wetlands with savanna, grassland, and riparian woodland interfluves culminates in an environment with interacting drivers of landscape change over space and time: fire, flooding, grazing, climatic oscillations, and differential human management practices. The environs of the Okavango are currently subject to four different land management regimes, most of which are now separated by staffed veterinary fences: open or communal lands, photography concessions, hunting concessions, and reserves / national parks. This work utilizes a suite of 85 Landsat TM and ETM+ images from 1989 to 2002 to assess fire magnitude and impact on landscape carbon storage as mitigated by 1) changing and variable rainfall and flooding and 2) the introduction of management zones aimed in part at controlling both proximate and ultimate drivers of fire dynamics and landscape change.
DE: 0428 Carbon cycling (4806)
DE: 0439 Ecosystems, structure and dynamics (4815)
DE: 0480 Remote sensing
DE: 4815 Ecosystems, structure, dynamics, and modeling (0439)
SC: Biogeosciences [B]
MN: 2007 Fall Meeting