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Keyword: aquatic habitat

An ecohydraulics virtual watershed: Integrating physical and biological variables to quantify aquatic habitat quality

Publications Posted on: July 08, 2020
Advances in remote sensing coupled with numerical modelling allow us to build a “virtual ecohydraulics watershed” at the micro-habitat scale. This approach is an integrated modelling framework with a cascade of models including physical (hydrologic, hydraulic, and stream water temperature) and biological (fish habitat) modelling at a resolution and extent important for aquatic and terrestrial organisms.

Multivariate geomorphic analysis of forest streams: Implications for assessment of land use impacts on channel condition

Publications Posted on: August 01, 2018
Multivariate statistical analyses of geomorphic variables from 23 forest stream reaches in southeast Alaska result in successful discrimination between pristine streams and those disturbed by land management, specifically timber harvesting and associated road building.

The eDNAtlas project: A national map of aquatic biodiversity

Science Spotlights Posted on: June 07, 2018
The National Genomics Center for Wildlife and Fish Conservation pioneered development of eDNA sampling of aquatic environments at their laboratory in Missoula, MT. The Center has partnered with dozens of National Forests, as well as other state, federal, tribal, and private natural resource organizations to assist in the collection and processing of eDNA samples. Thousands of eDNA samples are collected annually and constitute a rapidly growing biodiversity archive that provides precise information about native and non-native species distributions, temporal trends in those distributions, and the efficacy of species and habitat restoration and conservation efforts. eDNA sampling provides a low-cost & sensitive method for determining which species occur in water bodies. Rapid adoption of eDNA sampling by many natural resource agencies led to an exponential increase in data and the need for an open-access database. The website and open-access database were launched in June 2018 with approximately 6,000 samples and is updated semi-annually with newly processed samples.

Climate change, fish, and aquatic habitat in the Blue Mountains [Chapter 5]

Publications Posted on: April 27, 2017
National Forest System lands in the Blue Mountains region support a diversity of important native aquatic species that will be affected by climate change. As part of the Blue Mountains Adaptation Partnership, four of these species (spring Chinook salmon (Oncorhynchus tshawytscha Walbaum in Artedi), bull trout (Salvelinus confluentus Suckley), summer steelhead (O. mykiss Walbaum), and interior redband trout (O. m.

Evaluation of potential effects of federal land management alternatives on trends of salmonids and their habitats in the interior Columbia River basin.

Publications Posted on: May 12, 2016
Aquatic species throughout the interior Columbia River basin are at risk. Evaluation of the potential effects of federal land management on aquatic ecosystems across this region is an important but challenging task. Issues include the size and complexity of the systems, uncertainty in important processes and existing states, flexibility and consistency in the analytical framework, and an ability to quantify results.

Visual observation of fishes and aquatic habitat [Chapter 17]

Publications Posted on: May 15, 2015
Whether accomplished above the water surface or performed underwater by snorkel, scuba, or hookah divers or remotely operated vehicles (ROVs); direct observation techniques are among the most effective means for obtaining accurate and often unique information on aquatic organisms in their natural surroundings.

Stream temperature modeling and monitoring

Documents and Media Posted on: January 23, 2015
Thermal regimes are important to aquatic ecosystems because they strongly dictate species distributions, productivity, and abundance. Inexpensive digital temperature loggers (thermographs, such as the TidbiT data logger), geographic information systems (GIS), remote sensing technologies, and new spatial analyses are facilitating the development of temperature models and monitoring networks applicable at broad spatial scales.Document Type: Briefing Papers

Sediment delivery in a changing climate

Documents and Media Posted on: January 23, 2015
The delivery and transport of sediment through mountain rivers affects aquatic habitat and water resource infrastructure. While climate change is widely expected to produce significant changes in hydrology and stream temperature, the effects of climate change on sediment yield have received less attention.Document Type: Briefing Papers

Remote sensing of stream channels

Documents and Media Posted on: January 23, 2015
Streams are dynamic landscape elements that integrate and reflect the terrestrial and hydrologic components of a watershed. The costs, logistics, and spatial extent of stream networks on Forest Service lands often limit stream studies and monitoring efforts to restricted spatial scales.Document Type: Briefing Papers

Precipitation declines in Pacific Northwest mountains

Documents and Media Posted on: January 23, 2015
A rapidly warming climate across the Pacific Northwest is altering the volume, timing, and quality of water received from winter snowpack. Historic observations show increased dryness accompanying more widespread wildfire and forest die-off. These trends have generally been attributed to warming temperatures because measurement gauges at lower elevations throughout the region showed no significant decrease in precipitation.Document Type: Briefing Papers