A5019645929- Fish Ecology and Management Studies
- Aquatic Invertebrate Ecology and Behavior
- Hydrology and Sediment Transport Processes
- Freshwater macroinvertebrate diversity and ecology
- Soil and Water Nutrient Dynamics
- Hydrology and Watershed Management Studies
- Isotope Analysis in Ecology
- Ecology and biodiversity studies
- Mercury impact and mitigation studies
- Water Quality and Resources Studies
- Toxic Organic Pollutants Impact
- Wildlife Ecology and Conservation
- Marine Biology and Ecology Research
- Soil erosion and sediment transport
- Aquaculture disease management and microbiota
- Epigenetics and DNA Methylation
- Aquatic Ecosystems and Phytoplankton Dynamics
- Fish Biology and Ecology Studies
- Gut microbiota and health
- Coastal wetland ecosystem dynamics
- Marine and fisheries research
- Environmental Toxicology and Ecotoxicology
- Marine Ecology and Invasive Species
- Peatlands and Wetlands Ecology
- Diatoms and Algae Research
Lake Superior State University
2015-2024
University of Notre Dame
2002-2021
An experiment in >1000 river and riparian sites found spatial patterns controls of carbon processing at the global scale.
Since European settlement, over 50 % of coastal wetlands have been lost in the Laurentian Great Lakes basin, causing growing concern and increased monitoring by government agencies. For a decade, efforts focused on development regional organism-specific measures. To facilitate collaboration information sharing between public, private, agencies throughout we developed standardized methods indicators used for assessing wetland condition. Using an ecosystem approach stratified random site...
Rivers and streams contribute to global carbon cycling by decomposing immense quantities of terrestrial plant matter. However, decomposition rates are highly variable large-scale patterns drivers this process remain poorly understood. Using a cellulose-based assay reflect the primary constituent detritus, we generated predictive model (81% variance explained) for cellulose across 514 globally distributed streams. A large number variables were important predicting decomposition, highlighting...
Abstract Reach‐scale stream restorations are becoming a common approach to repair degraded streams, but the effectiveness of these projects is rarely evaluated or reported. We surveyed governmental, private, and nonprofit organizations in state Indiana determine frequency nature reach‐scale this midwestern U.S. state. For 10 attempted Indiana, questionnaires on‐site assessments were used better evaluate current designs for restoring ecosystems. At each restoration site, habitat water quality...
Stream restoration attempts to reverse the global degradation of rivers and streams, but rigorous evaluations are needed advance science. We evaluated a 3rd-order channelized Indiana (USA) stream that was restored in 1997 by constructing two meanders, each ∼400 m long. Pool riffle sequences were constructed, coarse substrate wood added channel, banks stabilized revegetated, sedimentation reduced creating sediment retention basin upstream. Habitat, periphyton, macroinvertebrates, fishes...
Stream restoration has accelerated in the Midwestern United States during past decade, but effects of on stream biota are rarely evaluated. From 1997 to 2000, we studied responses fish communities attempted two channelized streams (Juday Creek and Potato Creek) northwestern Indiana, each which received new meanders a 1-km reach length. The restored Juday also major improvement instream habitat, bank stabilization, silt control. In contrast, only reconnection historical meanders. Fish were...
In the Great Lakes, introduced Pacific salmon (Oncorhynchus spp.) can transport persistent organic pollutants (POPs), such as polychlorinated biphenyls (PCBs) and polybrominated diphenyl ethers (PBDEs), to new environments during their spawning migrations. To explore nature extent of POP biotransport by salmon, we compared 58 PCB 6 PBDE congeners found in directly those resident stream fish. We hypothesized that fish exposed spawners would have congener patterns similar presumed contaminant...
Biotic indicators are useful for assessing ecosystem health because the structure of resident communities generally reflects abiotic conditions integrated over time. We used fish data collected 5 years 470 Great Lakes coastal wetlands to develop multi-metric indices biotic integrity (IBI). Sampling and IBI development were stratified by vegetation type within each wetland account differences in physical habitat. Metrics evaluated against numerous anthropogenic disturbance derived from water...
The ecological effects of spawning runs native Pacific salmon (Oncorhynchus spp.) on stream ecosystems the Northwest and Northern Rim have been studied extensively. However, little is known about how nonnative affect in Great Lakes Basin, especially given difference environmental context between regions. Mechanisms by which spawners alter include nutrient enrichment from excretion live adults, carcass decomposition, physical disturbance substrate during redd construction. objective our study...
SUMMARY 1. In deciduous forest streams, fallen leaves form a large component of the total organic matter budget, and many become buried within stream sediments. We examined processing as compared with those at surface, influence subsurface hydrology on rates. 2. Leaf packs were secured streambed surface or 10 cm deep in upwelling downwelling reaches second‐order Michigan, U.S.A. Mass loss invertebrate colonisation measured from October to February. 3. Leaves lost mass more slowly...
Pacific salmon (Oncorhynchus spp.) can transport bioaccumulated organic pollutants to stream ecosystems where they spawn and die. We quantified PCBs, DDE, PBDEs in resident fishes from 13 Great Lakes tributaries assess biotransport of associated with introduced salmon. Resident sampled spawning reaches had higher mean pollutant concentrations than those upstream lacking (93.5 4.1 μg·kg–1 [PCB], 24.0 3.1 [DDE], 8.5 1.0 [PBDE], respectively), but differences varied substantially among lake...
Abstract The extent to which environmental context mediates the bioaccumulation of biotransported contaminants by stream‐resident organisms is poorly understood. For example, it unclear contaminant type, instream characteristics or resident fish identity interact influence uptake deposited Pacific salmon ( Oncorhynchus spp.) during their spawning runs. To address this uncertainty, we sampled four species from 13 watersheds Laurentian Great Lakes in locations with and without runs across a...
We demonstrate that the major ecological functions of Pacific salmon (Oncorhynchus spp.) can be altered or re-ordered in non-native habitats where environmental conditions differ from native ranges. compared subsidy and engineering effects spawning six streams within their introduced range (Laurentian Great Lakes) with responses reported (northern Rim). Streamwater nutrient (i.e., effects) Lakes were generally weak those streams, whereas disturbance was often strong abundant. attribute...
Microbiomes play an essential role in promoting host health and fitness fishes, but the factors driving variation gut microbiomes among individuals are not fully recognized. Understanding biological environmental influencing microbiome fishes is needed to link composition physiology potentially design manipulations improve rearing success fisheries aquaculture. In this study, we characterized of Atlantic salmon (Salmo salar), a globally important species commercial aquaculture recreational...
Abstract – Salmon and trout have been introduced to many ecosystems worldwide, yet the ecological impacts of salmonid introductions remain poorly understood. We investigated effects Pacific salmon on stream‐resident fish in Great Lakes basin by monitoring movements passive integrative transponder (PIT)‐tagged brook a Lake Michigan tributary receiving spawning run nearby stream not salmon. Coincident with September arrival salmon, an estimated 52% resident moved >200 m, while no such were...
Planning for freshwater conservation is often secondary to that terrestrial protected areas and rarely considers all aspects of biodiversity, such as functional biodiversity. To illustrate the application diversity in planning, we used data from a large-scale monitoring program characterize patterns taxonomic fish biodiversity across coastal wetlands northern Laurentian Great Lakes. We assessed relationship between these 2 types identify most likely maximize benefits terms dimensions In...