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Records 1 to
25
of 259 records about 'NARS OR National Aquatic Resource Surveys'
Geologic history explains freshwater fish species richness across the conterminous USA
(PRESENTATION) [Presented : Jan 27, 2025]
(PRESENTATION) [Presented : Jan 27, 2025]
Freshwater fishes comprise over 20% of extant vertebrate biodiversity despite occupying <1% of the Earth’s surface area, while species richness across river basins differs by several orders of magnitude. Explanations for these patterns often invoke spatial variation in o...
The National Wetland Condition Assessment: The Third Collaborative Survey of Wetlands in the United States.
(PUBLISHED REPORT) [Published : Dec 19, 2024]
(PUBLISHED REPORT) [Published : Dec 19, 2024]
This report presents the results of the third National Wetland Condition Assessment. Data were collected in 2021 and a small amount in 2022 as a result of COVID delays.
15N reflects wetland nitrogen processing on a national scale as predicted by soil chemistry stoichiometry
(PRESENTATION) [Presented : Dec 13, 2024]
(PRESENTATION) [Presented : Dec 13, 2024]
Wetlands provide critical ecosystem services by intercepting and retaining excess non-point nitrogen (N) inputs moving through the environment. However, not all wetlands have the same capacity to store and remove N via denitrification, plant uptake, or storage in soil organic mat...
Linking aquatic invertebrate δ15N and watershed N reduction processes across the US.
(PRESENTATION) [Presented : Dec 13, 2024]
(PRESENTATION) [Presented : Dec 13, 2024]
Total nitrogen (N) concentration is one of the most significant stressors to biological condition of US waterways. Anthropogenic input of N added to a watershed is a strong determinant of aquatic N concentrations, but concentrations can vary by over an order of magnitude fo...
Quantifying form resistance is essential for estimating summer low and bankfull flow from stream survey channel morphology
(JOURNAL) [Published : Dec 01, 2024]
(JOURNAL) [Published : Dec 01, 2024]
Reliable estimates of low flow and flood discharge at ungaged locations are required for evaluating stream flow alteration, designing culverts and stream crossings, and for interpreting regional surveys of habitat and biotic condition. The majority of locations where discha...
Diatoms and Their Importance for Ecological Assessments and Monitoring
(PRESENTATION) [Presented : Nov 19, 2024]
(PRESENTATION) [Presented : Nov 19, 2024]
Difficulty in diatom species identification and nomenclature can lead to major inconsistencies in taxonomic datasets. These inconsistencies may hinder the use of diatoms in large-extent bioassessments such as the U.S. Environmental Protection Agency’s (U.S. EPA) National Aq...
Natural and Anthropogenic Influences on the Physical Habitat in Streams
(PRESENTATION) [Presented : Nov 18, 2024]
(PRESENTATION) [Presented : Nov 18, 2024]
Effective environmental policy decisions benefit from stream habitat information that is accurate, precise, and relevant. The recurring National Rivers and Streams Assessments (NRSA), carried out by the U.S. EPA and its collaborating partners, require physical habitat information...
Loss in Soil Organic Carbon Storage in Wetlands Across the United States Over a 5-Year Period
(PRESENTATION) [Presented : Nov 16, 2024]
(PRESENTATION) [Presented : Nov 16, 2024]
Wetland soils contain some of the densest stores of carbon in the biosphere. However, there is little understanding of the quantity and distribution of carbon stored in wetlands of the United States (U.S.), or how these stocks change over time. The 2011 and 2016 National Wetland ...
Monitoring and Assessment in a Changing World
(PRESENTATION) [Presented : Nov 16, 2024]
(PRESENTATION) [Presented : Nov 16, 2024]
Monitoring and assessment is essential (1) to evaluate progress in meeting goals put into place to protect aquatic resources and (2) to respond and detect changes in the environment due to anthropogenic pressures, climate change, and other unforeseen stressors. In this Plen...
Long-term biodiversity trends of macroinvertebrates and fish in rivers and streams of the United States
(PRESENTATION) [Presented : Nov 15, 2024]
(PRESENTATION) [Presented : Nov 15, 2024]
Documenting long-term trends in communities can lead to new insights regarding how the quality of streams has changed across the US. The National Aquatic Resource Surveys (NARS) is a major national program aimed at understanding the state of the nation’s waters and provides...
One Health Approach to Regulating and Monitoring Mercury
(PRESENTATION) [Presented : Oct 28, 2024]
(PRESENTATION) [Presented : Oct 28, 2024]
Visual image depicting the Environmental Protection Agency’s One Health approach to control, reduce and eliminate mercury with the goal to protect human health and the environment. One Health is a collaborative, multisectoral, and transdisciplinary approach—working at the local, ...
DNA illuminates invasive species pathways of introduction and spread in the Great Lakes
(PRESENTATION) [Presented : Oct 15, 2024]
(PRESENTATION) [Presented : Oct 15, 2024]
Not applicable
A Data Exchange Standard for Wadeable Stream Habitat Monitoring Data
(PUBLISHED REPORT) [Published : Oct 03, 2024]
(PUBLISHED REPORT) [Published : Oct 03, 2024]
The Pacific Northwest Aquatic Monitoring Partnership (PNAMP) led a working group of four programs to develop a data exchange standard, assess the compatibility of metrics and demonstrate a process of integrating data from wadable streams. Data from wadeable streams collected by m...
Modelling lake and stream macroinvertebrate communities to improve estimates of biological conditions for the valuation of freshwater ecosystems
(PRESENTATION) [Presented : Sep 19, 2024]
(PRESENTATION) [Presented : Sep 19, 2024]
The U.S. Environmental Protection Agency (EPA) is conducting national surveys to capture the existence value of inland freshwaters. Recent work has found that people’s willingness to pay for improvements in water quality depends upon the biological conditions near them. The...
An Overview of U.S. EPA Research, Data, and Tools to Support National Monitoring and Management of Aquatic Ecosystems
(PRESENTATION) [Presented : Sep 02, 2024]
(PRESENTATION) [Presented : Sep 02, 2024]
On September 2, I will be giving a seminar in the Portuguese language titled “An Overview of U.S. EPA Research, Data, and Tools to Support National Monitoring and Management of Aquatic Ecosystems”. It will discuss the creation of the EPA, passage of the Clean Water Ac...
Report on the 2016 Pacific Northwest Wetland Condition Assessment
(PUBLISHED REPORT) [Published : Aug 31, 2024]
(PUBLISHED REPORT) [Published : Aug 31, 2024]
The United States Environmental Agency (USEPA), in partnership with the States and Tribes, performed the first National Wetland Condition Assessment (NWCA) in 2011 and reported that most of the wetland area in the US was in good or fair condition, except for the West Ecoregion, w...
Evaluating the effects of anthropogenic disturbance on benthic macroinvertebrate assemblages using joint species distribution models
(PRESENTATION) [Presented : Aug 20, 2024]
(PRESENTATION) [Presented : Aug 20, 2024]
Establishing an appropriate reference condition to assess biological integrity is challenging because human disturbance is ubiquitous. Because, few ecosystems are consistent with a minimally disturbed state, reference condition is often established using a suite of sites that are...
National Wetland Condition Assessment and National Estimates of Soil Carbon Storage
(PRESENTATION) [Presented : Jul 17, 2024]
(PRESENTATION) [Presented : Jul 17, 2024]
Dr. Amanda M. Nahlik (PESD), by invitation, is attending an interagency Inland Wetland Greenhouse Gas Inventory Workshop in Washington, D.C. The workshop will provide an overview of the context, current inventory and status of inland wetlands, ongoing Federal and non-Federa...
Quantifying the magnitude of climate, water quality, and land use as drivers of stream communities across the U.S. : Long-term biodiversity trends of macroinvertebrates and fish in rivers and streams of the United States
(PRESENTATION) [Presented : Jul 10, 2024]
(PRESENTATION) [Presented : Jul 10, 2024]
N/A- seminar for academic audience with no abstract
Isotopic evaluation of the National Water Model reveals missing agricultural irrigation contributions to streamflow across the western United States
(JOURNAL) [Published : Jul 04, 2024]
(JOURNAL) [Published : Jul 04, 2024]
The National Water Model (NWM) provides critical analyses and projections of streamflow that support water management decisions. However, the NWM performs poorly in lower elevation rivers of the western United States (U.S.). The accuracy of the NWM depends on the fideli...
Water Quality and Emissions
(PRESENTATION) [Presented : Jun 25, 2024]
(PRESENTATION) [Presented : Jun 25, 2024]
The National Aquatic Resource Surveys (NARS) program has been monitoring water chemistry and reporting on the condition of water quality for over 15 years. These data may be of particular interest to efforts to construct natural capital accounts, such as those being conduct...
Effects of lake water-level alteration on physical habitat and biological assemblages
(PRESENTATION) [Presented : Jun 07, 2024]
(PRESENTATION) [Presented : Jun 07, 2024]
Altered lake hydrology is an emerging, widespread threat as changing climate conditions and increasing human water use place greater pressure on water resources. Dam and land use management can significantly alter lake water-level regimes and flow characteristics, which in turn c...
FISH eDNA ILLUMINATES BIOTIC CONNECTIVITY IN LENTIC HABITATS
(PRESENTATION) [Presented : Jun 06, 2024]
(PRESENTATION) [Presented : Jun 06, 2024]
Fish community assessment is an important component of evaluating ecosystem health. Environmental DNA (eDNA) may supplement conventional methods by enhancing rare species detection and reducing field effort required for spatial and habitat specific coverage. However, eDNA is not ...
Local & watershed drivers of macroinvertebrate assemblages in lentic & lotic waters across the conterminous US
(PRESENTATION) [Presented : Jun 06, 2024]
(PRESENTATION) [Presented : Jun 06, 2024]
The relative role of natural and anthropogenic drivers on freshwater biodiversity across different aquatic ecosystem types is not well understood. The U.S. Environmental Protection Agency’s National Aquatic Surveys (NARS) offers a unique opportunity to compare lentic and lo...
National Aquatic Resource Surveys (NARS) Data for Addressing Research Questions at Broad Spatial and Temporal Scales
(PRESENTATION) [Presented : Jun 06, 2024]
(PRESENTATION) [Presented : Jun 06, 2024]
The National Aquatic Resource Surveys (NARS) program, a collaboration among United States Environmental Protection Agency (US EPA) Office of Water, Office of Research and Development (ORD), and states and tribes, assesses progress towards the objective of the Clean Water Act thro...