A5084050653- Climate change and permafrost
- Geology and Paleoclimatology Research
- Cryospheric studies and observations
- Rangeland and Wildlife Management
- Peatlands and Wetlands Ecology
- Fire effects on ecosystems
- Archaeology and Natural History
- Botany, Ecology, and Taxonomy Studies
- Tree-ring climate responses
- Landslides and related hazards
- Indigenous Studies and Ecology
- Geological Studies and Exploration
- Environmental DNA in Biodiversity Studies
- Ecology and Conservation Studies
- Lichen and fungal ecology
- Arctic and Antarctic ice dynamics
- Soil Carbon and Nitrogen Dynamics
- Soil erosion and sediment transport
AECOM (China)
2024
Alaska Biological Research (United States)
2015-2022
Abstract Widespread changes in the distribution and abundance of plant functional types (PFTs) are occurring Arctic boreal ecosystems due to intensification disturbances, such as fire, climate-driven vegetation dynamics, tundra shrub expansion. To understand how these affect ecosystems, we need first quantify change for multiple PFTs across recent years. While landscape patches generally composed a mixture PFTs, most previous moderate resolution (30 m) remote sensing analyses have mapped...
Ice-wedge polygons are widespread and conspicuous surficial expressions of ground-ice in permafrost landscapes. Thawing ice wedges triggers differential ground subsidence, local ponding, persistent changes to vegetation hydrologic connectivity across the landscape. Here we characterize spatio-temporal patterns ice-wedge degradation since circa 1950 environmental gradients on Alaska’s North Slope. We used a spectral thresholding approach validated by field observations map flooded thaw pits...
Arctic wetlands play a critical role in the global carbon cycle and are experiencing disproportionate impacts from climate change. Even though Alaska hosts 65% of U.S. wetlands, less than half have been mapped by Fish Wildlife Service National Wetlands Inventory (NWI) or other high-resolution protocols. The availability time series satellite data development machine learning algorithms enabled characterization wetland inundation dynamics vegetation types with limited ground input. In this...
Aims: The USNVC is the standard for vegetation classification in US and part of broader IVC. Recent work on Alaska established macrogroups, groups alliances. Here we incorporate tussock tundra low tall willow ( Salix ) alliances northwestern Arctic into IVC classification. Study Area: study area encompasses Seward Peninsula, western Brooks Range, foothills coastal plain Alaska. Methods: We used data from 2,087 relevé plots collected between 1992 2019 to prepare a draft association using...
ALA V177883). Uncommon in a wetland on