A5048583481- Fish Ecology and Management Studies
- Species Distribution and Climate Change
- Aquatic Invertebrate Ecology and Behavior
- Freshwater macroinvertebrate diversity and ecology
- Ecology and Vegetation Dynamics Studies
- Aquatic Ecosystems and Phytoplankton Dynamics
- Isotope Analysis in Ecology
- Animal Ecology and Behavior Studies
- Fire effects on ecosystems
- Coastal wetland ecosystem dynamics
- Marine and coastal ecosystems
- Fish Biology and Ecology Studies
- Genetic diversity and population structure
- Rangeland and Wildlife Management
- Environmental DNA in Biodiversity Studies
- Diptera species taxonomy and behavior
- Ecology and biodiversity studies
Augsburg University
2018-2022
University of Maine
2008-2010
University of Maine System
2006
Abstract 1. Little is known about native communities in naturally fishless lakes eastern North America, a region where fish stocking has led to decline these habitats. 2. Our study objectives were to: (i) characterise and compare macroinvertebrate found two biophysical regions of Maine (U.S.A.): kettle the lowlands foothills headwater central western mountains; (ii) identify unique attributes lake compared with (iii) develop method efficiently when thorough surveys are not possible. 3. We...
Abstract Conservation programs often aim to protect the abundance of individual species and biodiversity simultaneously. We quantified relations between amphipod densities aquatic macrophyte (large plants algae) diversity test a hypothesis that can support high single taxonomic group. Amphipods ( Gammarus lacustris Hyalella azteca ) are key forage for waterfowl declining in Prairie Pothole Region North America. sampled large gradient (0–7050 amphipods/m 3 49 semi-permanent wetlands, 50%...
Summary 1. Fish have been introduced into many previously fishless lakes throughout North America over the past 100+ years. It is difficult to determine historical distribution of lakes, however, because these introductions not always well‐documented. 2. Due its glacial history and low human population density, state Maine (U.S.A.) may host greatest number naturally in northeastern United States. However, less than one‐quarter Maine’s 6000+ surveyed for fish presence, no accurate assessments...
Small ponds constitute a significant number of standing water bodies on earth and may contribute to CO2 uptake or release into the atmosphere. Despite their importance, few studies have examined ecosystem metabolism in ponds, especially that be dominated by floating-leaved macrophytes. In this study, we measuring changes dissolved oxygen levels every 10 min from late May through October for four shallow (0.5–1.5 m) east-central Minnesota, USA. Ponds had varying macrophytes sparse (<1%...
1. Investigating dragonfly migration is important for understanding species' life history strategies, migratory connectivity, terrestrial‐aquatic linkages, and successful species conservation. While patterns are well‐documented some (e.g., Anax junius ), questions remain about potential behaviour of others. 2. We investigated the Aeshna canadensis (Walker, 1908; Canada darner) using phenological observations in three study ponds central Minnesota, 2017–2019. also conducted probabilistic...
We note the first records of non-native Umbra limi (Umbridae; central mudminnow) in Maine. Unrecognized fish were captured minnow traps set Caribou Bog, town Orono, during summer 1999. Preliminary identification by gross anatomy, coloration, and markings indicated that mudminnow. later confirmed this field using standard measurements counts; specimens vouchered (CU82322). Streams within Bog resampled for mudminnow summers 2000 2002. Several size classes captured, indicating presence viable...
Rhionaeschna mutata (Hagen) (Spatterdock Darner) is a rare North American dragonfly, most widely distributed in the eastern US. In 2009, reproductive population was found 2 ponds Minnesota, establishing substantial northwestern range expansion. We assessed geographic distribution of Spatterdock Darner region to inform conservation planning for this species. Using previously defined habitat criteria, we identified potential ecoregion with GIS. 2015 and 2016, used multiple methods survey 25...
We analyze a process-based temperature model for the length distribution and population over time of mayfly nymphs. Model parameters are estimated using Markov Chain Monte Carlo parameter estimation method utilizing data at five different stream sites. Two models (a standard exponential modified Weibull model) mortality evaluated, where in both cases growth is function temperature. Based on model-data comparisons to modeled Bayesian Information Criterion, we found that approaches can...