J. E. Flotemersch

J. E. Flotemersch
United States Environmental Protection Agency | US EPA · Office of Research and Development

Doctor of Philosophy

About

83
Publications
27,796
Reads
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1,014
Citations
Additional affiliations
February 2000 - January 2016
United States Environmental Protection Agency
Position
  • Senior Environmental Scientist

Publications

Publications (83)
Article
Full-text available
We analyzed spatial variation in fish species richness and community composition in the Karun River basin, Iran. Knowledge about fish diversity in the basin is incomplete and varies widely along spatial and temporal scales: The Karun is the longest river in Iran (950 km) with the largest drainage area (about 67,000 km 2). Fish samples were collecte...
Article
Biological monitoring is important for assessing the ecological condition of surface waters. However, there are challenges in determining what constitutes reference conditions, what assemblages should be used as indicators, and how assemblage data should be converted into quantitative indicator scores. In this study, we developed and applied biolog...
Article
Full-text available
Large river systems are one of the most important water resources for human societies. However, the ecological integrity of large rivers has been altered greatly by human activities. To monitor and manage these ecosystems, multimetric indices (MMI) are considered as efficient tools. This study aimed to develop and validate a fish-based multimetric...
Article
A physical, chemical and biological characterization of river systems is needed to evaluate their ecological quality and support restoration programs. Herein, we describe an approach using water chemistry, physical structure and land use for identification of a disturbance gradient existing in the Karun River Basin. For this purpose, at each site,...
Article
Full-text available
Length-weight relationships (LWR) for seven species from the Karun River system in Iran were provided. These species include Alburnus doriae, Alburnus sellal, Barbus karunensis, Capoeta coadi, Squalius berak, Turcinoemacheilus saadii and Rhinogobius lindberg. Fishes were collected in November and December 2018 and LWR is based on total length and w...
Article
Full-text available
The Matanuska–Susitna Borough is the fastest growing region in the State of Alaska and is impacted by a number of human activities. We conducted a multiscale assessment of the stressors facing the borough by developing and mapping the Index of Watershed Integrity (IWI) and Index of Catchment Integrity (the latter considers stressors in areas surrou...
Article
While factors influencing perceptions of drinking water have been well studied, those of aquatic ecosystems have been to lesser extent. We conducted a review to improve awareness of these factors. Environmental factors found to influence public perceptions of aquatic ecosystems were presence/absence of water plants and algae, presence/absence of fl...
Article
Full-text available
Sustainable development supports watershed processes and functions. To aid the sustainable development of the western Balkans’ transboundary river and lake basins, the Regional Environmental Center for Central and Eastern Europe and the US Environmental Protection Agency (EPA) adapted the EPA’s Index of Watershed Integrity (IWI) following the devas...
Article
Full-text available
Aquatic ecosystems provide services essential to human health and economies. Therefore, resource management programs aim to ensure the sustainable flow of these services. Stakeholder engagement is often a critical tool in learning what services are of priority to the public and may be integral to the success of aquatic ecosystem management because...
Presentation
Full-text available
Provides an overview of the development of the Index of Watershed Integrity, locations where it has been applied by the authors, and example applications
Article
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River flows connect people, places, and other forms of life, inspiring and sustaining diverse cultural beliefs, values, and ways of life. The concept of environmental flows provides a framework for improving understanding of relationships between river flows and people, and for supporting those that are mutually beneficial. Nevertheless, most appro...
Article
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Environmental decision- and policy-making must contend with uncertainty about the future that can hinder proactive environmental decisions, forcing environmental managers into reactive postures. To help prevent this, a variety of methods exist for exploring potential environmental futures and associated uncertainties. Producing environmental future...
Presentation
Full-text available
Environmental decision- and policy-making must contend with uncertainty about the future that can hinder proactive environmental decisions, forcing environmental managers into reactive postures. To help prevent this, a variety of methods exist for exploring potential environmental futures and associated uncertainties. Producing environmental future...
Article
Full-text available
Many conceptual syntheses in ecology and evolution are undergirded by either a patch- or continuum-based model. Examples include gradualism and punctuated equilibrium in evolution, and edge effects and the theory of island biogeography in ecology. In this study, we sought to determine how patch- or continuum-based analyses could explain variation i...
Conference Paper
Full-text available
Les rivières sont des systèmes socio-écologiques-des moyens de subsistance assurant le bien-être de millions de personnes, des centres de culture et les dépositaires d'un capital naturel précieux dans chaque bassin du monde. Alors que l'insécurité hydrique et le rythme de développement des infrastructures hydrauliques s'intensifient, les flux envir...
Article
Full-text available
Watershed integrity, the capacity of a watershed to support and maintain ecological processes essential to the sustainability of services provided to society, can be influenced by a range of landscape and in-stream factors. Ecological response data from four intensively monitored case study watersheds exhibiting a range of environmental conditions...
Article
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Fluvial geomorphology provides the basis for characterizing complex river networks and evaluating biophysical processes within watersheds. Understanding the spatial organization of morphological features, their influencing processes, and resultant geomorphic diversity in stream networks are important for efficient restoration, river health assessme...
Article
A recent paradigm shift from purely biophysical towards social-ecological assessment of watersheds has been proposed to understand, monitor, and manipulate the myriad interactions between human well-being and the ecosystem services that watersheds provide. However, large-scale, quantitative studies in this endeavour remain limited. We utilised two...
Article
This multi-year pilot study evaluated a proposed field method for its effectiveness in the collection of a benthic macroinvertebrate sample adequate for use in the condition assessment of streams and rivers in the Neuquén Province, Argentina. A total of 13 sites, distributed across three rivers, were sampled. At each site, benthic macroinvertebrate...
Article
The geomorphological character of a river network provides the template upon which evolution acts to create unique biological communities. Deciphering commonly observed patterns and processes within riverine landscapes resulting from the interplay between physical and biological components is a central tenet for the interdisciplinary field of river...
Article
Full-text available
Community-based watershed resilience programs that bridge public health and environmental outcomes often require cross-boundary, multi-country collaboration. The CRESSIDA project, led by the Regional Environmental Center for Central and Eastern Europe (REC) and supported by the US Environmental Protection Agency (EPA), forwards a resilience-focused...
Article
Rivers are among the most extensively modified ecosystems globally. Identifying linkages between critical drivers of change and ecological response is challenging because of the myriad of ways rivers are modified. This study examines longer-term relationships (> 70 yr) between the trophic status of fish and historical flow changes in rivers of the...
Presentation
Full-text available
The purpose of this presentation is to provide an overview and a couple of quick examples of how cultural/social values have been incorporated in to environmental flow programs in the United States. This presentation is organized with other presentations that are providing examples from other parts of the world.
Presentation
Full-text available
Spatial data and geographic information systems (GIS) are playing an increasingly important role in watershed science and management, particularly in the face of increasing climate uncertainty and demand for water resources. Concomitantly, scientists and managers are presented with ever-growing databases of spatial information, some of which are ‘b...
Chapter
Rivers have an important role in the development and continued prosperity of many countries through, inter alia, the ecosystem services they provide. Two concepts have captured the attention of natural resource managers enthusiastic to embrace linked human-environmental dimensions of social-ecological systems: resilience thinking and ecosystem serv...
Article
Scientists and policymakers often work together to develop policy about the sustainable use of river ecosystems. River science plays an important role in developing river policy but how can key aspects of river science be conveyed as a heuristic to navigate the interface between river science and river policy? This paper introduces eight principles...
Article
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As science has become more specialized and collaborative, a need has emerged for research organizations to develop authorship guidance that can be shared and discussed with potential collaborators. We present the guidance developed for a United States (U.S.) federal research laboratory that collaborates with both governmental and nongovernmental co...
Technical Report
Full-text available
The natural flow regime of a water body, defined as its characteristic pattern of flow magnitude, timing, duration, frequency, and rate of change, plays a critical role in supporting the chemical, physical, and biological integrity of streams and rivers and the services they provide1. Human-induced alteration of the natural flow regime can degrade...
Article
The substrata of fluvial systems can be altered by human disturbance in watersheds. This disturbance often results in a reduction of habitat diversity and subsequent reductions in species diversity. Restoration efforts in impacted areas require a thorough understanding of the characteristics of exemplary stream habitat in the region as well as habi...
Article
Full-text available
Simplified techniques for assessing the condition of aquatic ecosystems are widely used at multiple levels of investigation. Tools for the rapid characterization of the physical structure of river systems at the entire network scale are limited. Functional Process Zones (FPZs) are remotely-derived river sectors representing different hydrogeomorphi...
Presentation
Full-text available
Watersheds are spatially explicit landscape units that contain a range of interacting physical, ecological and social attributes. They are social–ecological systems that provide a range of ecosystem services valued by the society. Their ability to provide these services depends, in part, on the degree to which they are impaired by human-related act...
Presentation
Full-text available
Modelling and predicting aquatic ecosystem conditions throughout stream networks is becoming a priority for river researchers and managers. Much of the recent research effort has focused on determining the relationships between stream ecosystem variables (e.g., water temperature, nutrients, species assemblages) and drainage basin variables (e.g., l...
Presentation
Full-text available
Watersheds provide a variety of ecosystem services valued by society. Production of these services is partially a function of the degree to which watersheds are altered by human activities. In a recent manuscript, Flotemersch and others (in preparation), defined watershed integrity (WI) as the “capacity of a landscape, contributing surface water to...
Article
Full-text available
Watersheds are spatially explicit landscape units that contain a range of interacting physical, ecological and social attributes. They are social– ecological systems that provide a range of ecosystem services valued by the society. Their ability to provide these services depends, in part, on the degree to which they are impaired by human-related ac...
Article
The substrate of fluvial systems is regularly characterized as part of a larger physical habitat assessment. These measures are instrumental in meeting the regulatory responsibilities of bioassessment and monitoring programs, and essential to monitoring restoration and rehabilitation success. We describe and validate a commonly used technique for b...
Article
Full-text available
Benthic macroinvertebrates are sampled in streams and rivers as one of the assessment elements of the US Environmental Protection Agency's National Rivers and Streams Assessment. In a 2006 report, the recommendation was made that different yet comparable methods be evaluated for different types of streams (e.g., low gradient vs. high gradient). Con...
Presentation
Full-text available
Maintaining resilience is critical to sustaining healthy watersheds, where ‘healthy’ is defined as falling within natural ranges and maintaining natural functions. General attributes of a healthy watershed include the intactness of many processes such as hydrologic flow regime, sediment transport, processing and transport of organic materials, esta...
Presentation
Full-text available
This National Rivers and Streams Assessment 2008–2009: A Collaborative Survey (NRSA) presents the results of an unprecedented sampling effort undertaken by the U.S. Environmental Protection Agency and its state and tribal partners. It provides information on the ecological condition of the nation’s rivers and streams and the key stressors that affe...
Presentation
Full-text available
Benthic macroinvertebrates are sampled in streams and rivers as one of the assessment elements of the U.S. Environmental Protection Agency’s National Rivers and Streams Assessment. In a 2006 report, the recommendation was made that different yet comparable methods be evaluated for different types of streams (e.g., low gradient vs. high gradient). C...
Presentation
Full-text available
Benthic macroinvertebrates are sampled in streams and rivers as one of the assessment elements of the US Environmental Protection Agency’s National Rivers and Streams Assessment. In a 2006 report, the recommendation was made that different yet comparable methods be evaluated for different types of streams (e.g., low gradient vs. high gradient). Con...
Presentation
Full-text available
This National Rivers and Streams Assessment 2008–2009: A Collaborative Survey (NRSA) presents the results of an unprecedented sampling effort undertaken by the U.S. Environmental Protection Agency and its state and tribal partners. It provides information on the ecological condition of the nation’s rivers and streams and the key stressors that affe...
Article
Full-text available
Bioassessment is the use of biosurvey data, most commonly for benthic macroinvertebrates and fish, to obtain information about the health of waters in a region. In rivers, bioassessment results are used to evaluate biological condition and trends, to establish relationships between stressors and impairments, and to guide and evaluate management act...
Article
Full-text available
River systems consist of hydrogeomorphic patches (HPs) that emerge at multiple spatiotemporal scales. Functional process zones (FPZs) are HPs that exist at the river valley scale and are important strata for framing whole-watershed research questions and management plans. Hierarchical classification procedures aid in HP identification by grouping s...
Article
Full-text available
River science and management can be conducted at a range of spatiotemporal scales from reach to basin levels as long as the project goals and questions are matched correctly with the study design's spatiotemporal scales and dependent variables. These project goals should also incorporate information on the hydrogeomorphically patchy nature of river...
Poster
Full-text available
The gap between public policy and science has long been seen as a turbulent boundary. Policymakers and scientists are often working towards the same national interest – sustainable river ecosystems – yet both face enormous challenges and uncertainties when developing river policy. Scientific evidence helps policymakers develop and evaluate policy o...
Presentation
Full-text available
Bioassessment is the use of biosurvey data to obtain information about the health of specific bodies of water. Biosurvey may measure the presence, condition, numbers, and types of fish, benthic macroinvertebrates, amphibians, algae, and plants. Biological endpoints provide the advantages of being easy to measure, responsive to stress in the watersh...
Article
Full-text available
Leeches were collected from six fish species distributed among four of ten sites sampled. The leech species observed were Myzobdella reducta (Meyer 1940) and Myzobdella lugubris Leidy, 1851 of the family Piscicolidae and Placobdella pediculata Hemingway, 1908 of the family Glossiphoniidae. Attachment locations for Myzobdella lugubris included vario...
Conference Paper
Full-text available
Background/Question/Methods The world’s rivers are increasingly under pressure. There is a general recognition of the degraded state of rivers, which has led to river management strategies that aim to conserve the environmental amenity of rivers while maintaining the services that rivers provide to society. But what are the guiding principles to...
Presentation
Full-text available
The world’s rivers are increasingly under pressure. There is a general recognition of the degraded state of rivers, which has led to river management strategies that aim to conserve the environmental amenity of rivers while maintaining the services that rivers provide to society. But what are the guiding principles to consider in managing rivers? H...
Presentation
Full-text available
The aquatic life of streams and rivers (fish, insects, plants, shellfish, amphibians, etc.) integrates the cumulative effects of multiple stressors generated by both point source and non-point source pollution. Bioassessments, consisting of surveys and other direct measures of aquatic life, are the most effective way to measure the aggregate impact...
Article
Full-text available
Philobdella gracilis Moore, 1901 (Macrobdellidae: Hirudinida) is reported from Arkansas and Oklahoma for the first time. Specimens were collected in creeks and ponds. The Mississippi drainage distribution of P. gracilis and eastern distribution Philobdella floridana were confirmed by reexamination of museum specimens.
Article
There is increasing international interest by water resource management agencies worldwide in developing the capacity for quantitative bioassessments of boatable rivers. This interest stems from legal mandates requiring assessments, plus growing recognition of the threats to such systems from multiple and co-varying stressors (e.g. chemical polluta...
Conference Paper
Full-text available
Development of collaborative biological monitoring and assessment efforts among countries and regions of Asia is of highest priority. The United States (U.S.), Europe, Australia, and many countries of Latin America have established bioassessment protocols and share technology and data. However, many Asian countries have only begun to plan toward si...
Article
Full-text available
Assignment of values for natural ecological benefits and anthropocentric ecosystem services in riverine landscapes has been problematic, because a firm scientific basis linking these to the river's physical structure has been absent. We highlight some inherent problems in this process and suggest possible solutions on the basis of the hydrogeomorph...
Article
Measurement and estimation of performance characteristics (i.e. precision, bias, performance range, interferences and sensitivity) are often neglected in the development and use of biological sampling methods. However, knowledge of this information is critical in enabling potential users to assess data quality and make comparisons among different s...
Article
Multiple diatom sampling methods exist for the assessment of lotic systems but few comparisons of their application efficacies in monitoring have been conducted. In this study 60 sites were sampled on four large, non-wadeable rivers in Ohio and Kentucky, USA, which varied in depth, flow rate, surrounding land use and hydrologic modification. Four a...
Article
Efforts to develop benthic macroinvertebrate sampling protocols for the bioassessment of lotic ecosystems have been focused largely on wadeable systems. As these methods became increasingly refined and accepted, a growing number of monitoring agencies expanded their work and are now developing sampling protocols for non-wadeable large rivers. Large...