A5063025330- Fire effects on ecosystems
- Rangeland and Wildlife Management
- Ecology and Vegetation Dynamics Studies
- Plant Water Relations and Carbon Dynamics
- Tree-ring climate responses
- Fish Ecology and Management Studies
- Species Distribution and Climate Change
- Forest ecology and management
- Hydrology and Sediment Transport Processes
- Marine and coastal plant biology
- Archaeology and Natural History
- Aquatic Invertebrate Ecology and Behavior
- Botany and Plant Ecology Studies
- Botany, Ecology, and Taxonomy Studies
- Coastal wetland ecosystem dynamics
- Remote Sensing in Agriculture
- Oil Palm Production and Sustainability
- Landslides and related hazards
- Plant and animal studies
- Conservation, Biodiversity, and Resource Management
- Tree Root and Stability Studies
- Coral and Marine Ecosystems Studies
- Climate change impacts on agriculture
- Middle East and Rwanda Conflicts
- Plant Parasitism and Resistance
Wesleyan University
2015-2024
Yale University
2007-2017
Pennsylvania State University
2007
Southern Illinois University Carbondale
1973
Abstract Fire regimes in North American forests are diverse and modern fire records often too short to capture important patterns, trends, feedbacks, drivers of variability. Tree‐ring scars provide valuable perspectives on regimes, including centuries‐long year, season, frequency, severity, size. Here, we introduce the newly compiled tree‐ring fire‐scar network (NAFSN), which contains 2562 sites, >37,000 fire‐scarred trees, covers large parts America. We investigate NAFSN terms geography,...
Aquatic invasive species pose major ecological and economic threats to aquatic ecosystems worldwide via displacement, predation, or hybridization with native the alteration of habitats hydrologic cycles. Modeling habitat suitability alien through spatially explicit mapping is an increasingly important risk assessment tool. Habitat modeling also facilitates identification key environmental variables influencing distributions. We compared four methods predict potential continental United...
The abundance and distribution of species reflect how the niche requirements dynamics populations interact with spatial temporal variation in environment. This study investigated influence geographical environmental site conditions on tree dominance diversity patterns three topographically dissected mountain ranges west Texas, USA, northern Mexico. We measured basal area using a systematic sampling design across forested areas related these data to suite parameters derived from field digital...
Abstract Post‐fire stand water balance is a critical factor influencing tree regeneration and survival, which are often modulated by fire severity. We examined influences of the post‐fire vegetation matrix severity on diurnal, seasonal, multi‐year variation in evapotranspiration (ET) analyzing relationship between ECOsystem Spaceborne Thermal Radiometer Experiment International Space Station (ECOSTRESS) ET data using multivariate linear mixed effects modeling. Unlike many high‐severity sites...
To investigate the relationship between altitudinal distribution of Quercus laceyi and Q. sideroxyla their physiological responses to drought, we measured relative water content (RWC), potentials (Ψ predawn Ψ midday ), photosynthesis ( A max stomatal conductance g chlorophyll fluorescence F v / m spectral reflectance (400–1100 nm) five times during a 7 wk acute drought. was drought tolerant, while avoider; tolerated lower RWC = 54%, 44%), pd −2.6 MPa, −3.3 MPa), md −4.5 −6.6 MPa). The also...
Abstract The occurrence of wildfire is influenced by a suite factors ranging from “top‐down” influences (e.g., climate) to “bottom‐up” localized ignitions, fuels, and land use). We carried out the first broad‐scale assessment wildland fire patterns in northern Mexico assess relative influence top‐down bottom‐up drivers region where frequent regimes continued well into 20th century. Using network 67 sites, we assessed (1) synchrony scales at which evident, (2) climate fire, (3) asynchrony...
Wildfire refugia are forest patches that minimally-impacted by fire and provide critical habitats for fire-sensitive species seed sources post-fire regeneration. relatively understudied, particularly concerning the impacts of subsequent fires on existing refugia. We opportunistically re-visited 122 sites classified in 1994 a prior study, which were burned two wildfires 2012 Cascade mountains central Washington, USA. evaluated effects historically persistent compared them to surrounding...
Trees may survive fire through persistence of above or below ground structures. Investment in bark aids above-ground survival while investment carbohydrate storage recovery resprouting and is especially important following tissue loss. We investigated allocation eight common oak (Quercus) species Sky Island mountain ranges west Texas. hypothesized that relative carbohydrates changes with tree age regime: predicted delayed (positive allometry) early (negative under lower frequency, high...
Predicting the future spread of non-native aquatic species continues to be a high priority for natural resource managers striving maintain biodiversity and ecosystem function. Modeling potential distributions alien through spatially explicit mapping is an increasingly important tool risk assessment prediction. Habitat modeling also facilitates identification key environmental variables influencing distributions. We modeled distribution aggressive invasive minnow, red shiner (Cyprinella...
The development of frameworks for better-understanding ecological syndromes and putative evolutionary strategies plant adaptation to fire has recently received a flurry attention, including new model hypothesizing that plants have diverged into three different flammability due natural selection. We provide case studies pyromes/taxa (Pinus, the Proteaceae Cape Floristic Region, Eucalyptus) that, contrary assumptions, reveal species often exhibit traits more than one these post-fire recovery...
In many woody dicot plant species, colder temperatures correlate with a greater degree of leaf dissection and larger more abundant teeth (the serrated edges along margins). The measurement site-mean characteristics size shape (physiognomy), including tooth morphology, has been an important paleoclimate tool for over century. These physiognomic-based climate proxies require that all plants at site, regardless change their rapidly predictably in response to temperature. Here we experimentally...
While piñon woodlands cover much of arid North America, surprisingly little is known about the role fire in maintaining forest structure and species composition. The lack region-specific regime data for piñon–juniper presents a roadblock to managers striving implement process-based management. This study characterized regimes stand dynamics Big Bend National Park (BIBE) Davis Mountains Preserve Nature Conservancy (DMTNC) west Texas. Mean return intervals were 36.5 11.2 years BIBE DMTNC,...
This study documents tree mortality in Big Bend National Park Texas response to the most acute one-year drought on record, which occurred following a five-day winter freeze. I estimated changes forest stand structure and species composition due freezing Chisos Mountains of using permanent monitoring plot data. The killed over half (63%) sampled trees entire elevation gradient. Significant up 20 cm diameter (P < 0.05). Pinus cembroides Zucc. experienced highest seedling 0.0001) (55% piñon...