A5070863467- Hydrology and Watershed Management Studies
- Hydrology and Sediment Transport Processes
- Statistical and Computational Modeling
- Fish Ecology and Management Studies
- Soil erosion and sediment transport
- Chemistry and Stereochemistry Studies
- Soil and Water Nutrient Dynamics
- Color Science and Applications
- Freshwater macroinvertebrate diversity and ecology
- Geographic Information Systems Studies
- Scientific Measurement and Uncertainty Evaluation
- Advanced Database Systems and Queries
- Coastal wetland ecosystem dynamics
- Semantic Web and Ontologies
- Polish Historical and Cultural Studies
- Peatlands and Wetlands Ecology
- Isotope Analysis in Ecology
- Aquatic Invertebrate Ecology and Behavior
- Marine and coastal ecosystems
- Polish socio-economic development
- Physiological and biochemical adaptations
- Civil and Structural Engineering Research
- French Urban and Social Studies
- Atmospheric and Environmental Gas Dynamics
- Ecology, Conservation, and Geographical Studies
University of North Carolina at Chapel Hill
2014-2025
Duke University
2022-2023
University of Montana
2013-2022
Radboud University Nijmegen
2022
North Carolina State University
2020
Rocky Mountain Biological Laboratory
2019-2020
Abstract Streamflow observations can be used to understand, predict, and contextualize hydrologic, ecological, biogeochemical processes conditions in streams. Stream gages are point measurements along rivers where streamflow is measured, often infer upstream watershed‐scale processes. When stream read zero, this may indicate that the has dried at location; however, zero‐flow readings also caused by a wide range of other factors. Our ability identify whether or not gage reading indicates dry...
Abstract Rivers that do not flow year-round are the predominant type of running waters on Earth. Despite a burgeoning literature natural intermittence (NFI), knowledge about hydrological causes and ecological effects human-induced, anthropogenic (AFI) remains limited. NFI AFI could generate contrasting biological responses in rivers because distinct underlying drying evolutionary adaptations their biota. We first review show how different drivers alter timing, frequency duration drying,...
Nonperennial streams dominate global river networks and are increasing in occurrence across space time. When surface flow ceases or the water dries, moisture can be retained subsurface sediments of hyporheic zone, supporting aquatic communities ecosystem processes. However, hydrological ecological definitions zone have been developed perennial rivers emphasize mixing organisms from both stream groundwater. The adaptation such to include humid dry unsaturated conditions could promote...
Accurately estimating stream discharge is crucial for many ecological, biogeochemical, and hydrologic analyses. As of September 2022, The National Ecological Observatory Network (NEON) provided up to 5 years continuous estimates at 28 streams across the United States. NEON created rating curves each site in a Bayesian framework, parameterized using hydraulic controls manual measurements discharge. Here we evaluate reliability these with three approaches. We (1) compared predicted observed...
Abstract While most global productivity is driven by modern photosynthesis, river ecosystems are supplied locally fixed and imported carbon that spans a range of ages. Alluvial aquifers gravel-bedded floodplains present conundrum: despite no possibility for photosynthesis in groundwater extreme paucity labile organic carbon, they support diverse abundant large-bodied consumers (stoneflies, Insecta: Plecoptera). Here we show up to majority the biomass composition these top four floodplain...
Mangroves can capture and store organic carbon their protection therefore restoration is a component of climate change mitigation. However, there are few empirical measurements long-term storage in mangroves or how varies across environmental gradients. The context dependency this process combined with geographically limited field sampling has made it difficult to generalize regional global rates mangrove sequestration. This turn hampered the inclusion sequestration by cycle models offset...
The importance of rivers and streams to the global carbon cycle is well established, increasingly. research has emphasized role in-stream metabolism on transformation within aquatic environments. However, while stream studies are abundant in northern latitudes, tropical remains notably scarce. In this study, we characterized fluxes into out a small tropical, peatland-rich ecosystem Andes mountains. We measured dissolved oxygen, dioxide, discharge every 15 minutes at 4 locations downstream...
Expanded availability of estimates ecosystem metabolism and gas exchange from the worlds streams rivers is rapidly revising river contributions to global carbon budgets. Here, we present gross primary production, respiration, 27 across North America, including Puerto Rico, using data National Ecological Observatory Network (NEON). Further, explore how aggregating processing input influences model outputs, expanding methodological knowledge in approaching sensor collection manipulation for...
The use of carbon stable isotopes has contributed to many important discoveries regarding the base consumer production in freshwater ecosystems. There is increasing recognition for prevalence anoxic conditions and contributions methane-derived food webs, highlighting potential methanotrophy chemoautotrophy complicate interpretations δ13C values biomass. These reduced substrates are sometimes cryptic, or present at such low concentrations that they might not provide an obvious source,...
Abstract Inland waters emit large amounts of carbon and are key players in the global budget. Particularly high rates emissions have been reported streams draining mountains, tropical regions, peatlands. However, few studies examined spatial variability CO 2 concentrations fluxes occurring within these systems, particularly as a function catchment morphology. Here we evaluated patterns three tropical, headwater catchments relation to river network stream geomorphology. We measured dissolved...
Abstract The US Federal Government supports hundreds of watershed monitoring efforts from which solute fluxes can be calculated. Although instrumentation and methods vary between studies, the data collected their motivating questions are remarkably similar. Nevertheless, little effort toward compilation has previously been made. MacroSheds project developed a future‐friendly system for harmonizing daily time series streamflow, precipitation, chemistry 169+ watersheds, supplementing each with...
The U.S. Federal Government supports hundreds of watershed ecosystem monitoring efforts from which solute fluxes can be calculated. While details instrumentation and sampling methods vary across these studies, the types data collected questions that motivate their analysis are remarkably similar. Nevertheless, little effort toward compilation datasets has previously been made, comparative analyses have remained limited in scale. MacroSheds project developed a flexible, future-friendly system...
Alluvial aquifers are key components of river floodplains and biodiversity worldwide, but they contain extreme environmental conditions have limited sources carbon for sustaining food webs. Despite this, support abundant populations aquifer stoneflies that large proportions their biomass derived from methane. Methane is typically produced in freshwater ecosystems anoxic conditions, while (Order: Plecoptera) thought to require highly oxygenated water. The potential importance methane-derived...
Abstract Streams and rivers are major sources of greenhouse gases (GHGs) to the atmosphere, as carbon nitrogen converted outgassed during transport. Although our understanding drivers individual GHG fluxes has improved with numerous site‐specific studies global‐scale compilations, ability parse out interrelated physical biogeochemical gas concentrations is limited by a lack consistently collected, temporally continuous samples GHGs their associated drivers. We present first analysis such...
Abstract Freshwater ecosystems are globally significant sources of greenhouse gases (GHGs) to the atmosphere. Previous work has indicated that GHG flux in headwater streams is dominated by terrestrially derived gases, with situ production limited short organic matter residence times and high dissolved oxygen concentrations due turbulent reaeration. However, low‐gradient contain pool structures longer may be conducive GHG. These streams, longitudinal heterogeneity therein, seldom studied. We...
Abstract Little is known about the life histories, genetic structure and population connectivity of shallow groundwater organisms. We used next-generation sequencing (RAD-seq) to analyse genomic in two aquifer species: Paraperla frontalis (Banks, 1902), a stonefly with larvae aerial (winged) adults; Stygobromus sp., groundwater-obligate amphipod. found similar differentiation each species between floodplains separated by ~70 river km Flathead River basin north-west Montana, USA. Given that...
Aquatic insects cope with hypoxia and anoxia using a variety of behavioral physiological responses. Most stoneflies (Plecoptera) occur in highly oxygenated surface waters, but some species live underground alluvial aquifers containing heterogeneous oxygen concentrations. Aquifer appear to be supported by methane-derived food resources, which they may exploit anoxia-resistant behaviors. We documented dissolved dynamics collected over 5 years floodplain wells the Flathead River, Montana....
Abstract While inundated, small ponds (< 1000 m 2 area) account for disproportionately large contributions of CO efflux to the global carbon budget and also store in anoxic sediments. However, pond hydrology is shifting toward increasingly dry conditions alpine temperate zones, which might lead increased exposure shallow We analyzed sediment rates dried sediments multiple varying characteristics at montane subalpine elevations near Rocky Mountain Biological Laboratory Colorado. Average...
Abstract Over 50 years ago nymphs of the Plecoptera species, Paraperla frontalis Banks, 1906 (Plecoptera: Chloroperlidae), were shown to exist in a shallow floodplain aquifer Tobacco River, gravel‐bed river western Montana and later they documented throughout main stems Flathead River system. Nymphs are almost never found surface waters, until emerge on shorelines. As teneral adults, mate subsequently deposit fertilized eggs into river. This novel life cycle is termed “amphibitic.” we others...