A5039122289- Hydrology and Sediment Transport Processes
- Soil erosion and sediment transport
- Tree-ring climate responses
- Hydrology and Watershed Management Studies
- Plant Water Relations and Carbon Dynamics
- Geology and Paleoclimatology Research
- Peatlands and Wetlands Ecology
- Archaeology and Natural History
- Animal Vocal Communication and Behavior
- Remote Sensing and LiDAR Applications
- Geological formations and processes
- Animal Behavior and Reproduction
- Climate change and permafrost
- Flood Risk Assessment and Management
- Avian ecology and behavior
- Fish Ecology and Management Studies
- Fire effects on ecosystems
- Marine animal studies overview
- Geochemistry and Geologic Mapping
- Coastal wetland ecosystem dynamics
- Water Quality and Resources Studies
- Ecology and Vegetation Dynamics Studies
- Plant and animal studies
- Rangeland and Wildlife Management
- Regional Socio-Economic Development Trends
National Park Service
2020-2023
Colorado State University
2014-2020
College of Wooster
2008
1. Riparian zones are vital areas of interaction between land and rivers often degraded by several pressures such as urbanisation, intensive agriculture river engineering works. 2. This policy brief provides five key messages recommendations to be considered policy-makers, scientists, managers, stakeholders enhance riparian zone management. 3. Adopting an integrated socio-economic environmentally dynamic view will ensure the sustainable management zones. 4. In light climate change, it is...
Abstract As sediment is transported through river corridors, it typically spends more time in storage than transport, and as a result, delivery timescales are controlled by the duration of storage. Present understanding largely derived from models or field studies covering relatively short (≤10 2 year) spans. Here we quantify distribution for 17 km length Powder River Montana, USA determining age eroded sediment. Our approach integrates surveyed cross‐sections, analysis historical aerial...
Long duration tree-ring records with annual precision allow for the reconstruction of past growing conditions. Investigations limited to most common proxy ring width can be difficult interpret, however, because radial growth is affected by multiple environmental processes. Furthermore, studies living trees may miss important effects drought on tree survival and forest changes. Stable carbon isotopes help distinguish from other factors that influence stand condition. We quantified expansion...
In most male birds that exhibit paternal care, elevation in testosterone above the breeding baseline reduces nestling provisioning, which can be detrimental to offspring survival. Mechanisms may allow some males avoid this effect of elevated include (1) decreased sensitivity testosterone's effects on behavior and (2) uncoupling secretion from territorial challenges (thus reducing number transient elevations baseline). Both these "cost-avoidance" mechanisms have been documented, but whether...
River flow reconstructions are typically developed using tree rings from montane conifers that cannot reflect regulation or hydrologic inputs the lower portions of a watershed. Incorporating lowland riparian trees may improve accuracy when these physically linked to alluvial water table. We used plains cottonwoods (Populus deltoides ssp. monilifera) reconstruct discharge for three neighboring rivers in Upper Missouri Basin: Yellowstone (n = 389 cores), Powder 408), and Little Rivers 643)....
Abstract Riparian trees and their annual growth rings can be used to reconstruct drought histories related streamflow. Because the death of individual reduces competition for survivors, however, tree‐ring chronologies based only on surviving may underestimate impacts. This problem addressed by calculating productivity at stand scale account tree mortality establishment. In semi‐arid Great Basin in western United States, we calculated riparian wood production from 1946 2016 along a stream...
Abstract River regulation induces immediate and chronic changes to floodplain ecosystems. We analysed both short‐term prolonged effects of river on the growth patterns keystone riparian tree species Fremont cottonwood ( Populus deltoides ssp. wislizenii ) at three upper Colorado Basin rivers having different magnitudes flow regulation. compared basal area increment (i) regulated Upper Green below Flaming Gorge Dam; (ii) adjacent free‐flowing Yampa River; (iii) partially Lower their...
Abstract Point bars are crucial alluvial features that help sustain meandering river ecosystems. They influenced by interactions among physical processes and biological components, such as riparian vegetation. Understanding the mechanisms underlying these can inform management decisions. The Powder River in southeastern Montana, USA, provides a valuable study system for fluvial because it has no major human alterations. Riparian stands of non‐native Russian olive trees ( Elaeagnus...
Song sharing among neighboring males is a well-known, frequent outcome of song learning in oscine passerines and some other groups, but only limited investigations the spatial scale this phenomenon have been pursued. On basis recordings 1,043 individuals, we investigated Dickcissels (Spiza americana) at local regional scales sites from northern Kansas to Oklahoma. Classification elements revealed decreasing similarity with increasing distances between individual birds small intermediate...
Abstract Six plains cottonwoods along the axis of a meander were excavated to determine if dendrochronology could identify year and location germination date past overbank sedimentation events. Samples from all trees showed clear anatomical changes associated with burial, including increased vessel size, decreased definition annual ring boundaries, widths. Some these burial signatures created by deposition only few centimeters sediment, most events detected multiple samples same tree. Four...
Abstract Hydrogeomorphic processes strongly influence riparian vegetation, but few studies have determined the of knickpoint development on these processes. We investigate and channel incision flood inundation, morphology, vegetation Fremont River in Utah. conducted topographic surveys ( n = 30 transects) plot‐based 336) three 1 km‐long reaches with varying proximities to a human‐created knickpoint. also developed 1D hydraulic models assess inundation patterns. Our data indicate that affects...