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Reports

Browse more than 82,000 reports authored by our scientists over the past 100+ year history of the USGS and refine search by topic, location, year, and advanced search.

Filter Total Items: 84795

Identification of metrics to monitor salt marsh integrity on National Wildlife Refuges in relation to conservation and management objectives Identification of metrics to monitor salt marsh integrity on National Wildlife Refuges in relation to conservation and management objectives

Executive Summary Most salt marshes in the US have been degraded by human activities, and threats from physical alterations, surrounding land-use, species invasions, and global climate change persist. Salt marshes are unique and highly productive ecosystems with high intrinsic value to wildlife, and many National Wildlife Refuges (NWRs) have been established in coastal areas to protect...
Authors
Hilary A. Neckles, Glenn R. Guntenspergen, W. George Shriver, Nicholas P. Danz, Whitney A. Wiest, Jessica L. Nagel, Jennifer H. Olker

Seafloor off Lighthouse Point Park, Santa Cruz, California Seafloor off Lighthouse Point Park, Santa Cruz, California

The seafloor off Lighthouse Point Park, Santa Cruz, California, is extremely varied, with sandy flats, boulder fields, faults, and complex bedrock ridges. These ridges support rich marine ecosystems; some of them form the "reefs" that produce world-class surf breaks. Colors indicate seafloor depth, from red-orange (about 2 meters or 7 feet) to magenta (25 meters or 82 feet).
Authors
Curt D. Storlazzi, Nadine E. Golden, Helen Gibbons

GEM Building Taxonomy (Version 2.0) GEM Building Taxonomy (Version 2.0)

This report documents the development and applications of the Building Taxonomy for the Global Earthquake Model (GEM). The purpose of the GEM Building Taxonomy is to describe and classify buildings in a uniform manner as a key step towards assessing their seismic risk, Criteria for development of the GEM Building Taxonomy were that the Taxonomy be relevant to seismic performance of...
Authors
S. Brzev, C. Scawthorn, A.W. Charleson, L. Allen, M. Greene, Kishor Jaiswal, V. Silva

Use and interpretation of climate envelope models: a practical guide Use and interpretation of climate envelope models: a practical guide

This guidebook is intended to provide a practical overview of climate envelope modeling for conservation professionals and natural resource managers. The material is intended for people with little background or experience in climate envelope modeling who want to better understand and interpret models developed by others and the results generated by such models, or want to do some...
Authors
James I. Watling, Laura A. Brandt, Frank J. Mazzotti, Stephanie S. Romañach

Metadata for selecting or submitting generic seismic vulnerability functions via GEM's vulnerability database Metadata for selecting or submitting generic seismic vulnerability functions via GEM's vulnerability database

This memo lays out a procedure for the GEM software to offer an available vulnerability function for any acceptable set of attributes that the user specifies for a particular building category. The memo also provides general guidelines on how to submit the vulnerability or fragility functions to the GEM vulnerability repository, stipulating which attributes modelers must provide so that...
Authors
Kishor Jaiswal

Adaptive harvest management for the Svalbard population of pink-footed geese: briefing summary Adaptive harvest management for the Svalbard population of pink-footed geese: briefing summary

The African-Eurasian Waterbird Agreement (AEWA; http://www.unep-aewa.org/) calls for means to manage populations which cause conflicts with certain human economic activities. The Svalbard population of the pink-footed goose has been selected as the first test case for such an international species management plan to be developed. This document describes progress to date on the...
Authors
Fred A. Johnson

Status and trends monitoring of the mainstem Columbia River: sample frame development and review of programs relevant to the development of an integrated approach to monitoring Status and trends monitoring of the mainstem Columbia River: sample frame development and review of programs relevant to the development of an integrated approach to monitoring

Implementing an Integrated Status and Trends Monitoring program (ISTM) for the mainstem Columbia River will help identify trends in important natural resources and help us understand the long-term collective effects of management actions. In this report, we present progress towards the completion of a stepwise process that will facilitate the development of an ISTM for the mainstem...
Authors
Timothy D. Counihan, Jill M. Hardiman, Stephen Waste

Seafloor off Pleasure Point, Santa Cruz County, California Seafloor off Pleasure Point, Santa Cruz County, California

The seafloor off Pleasure Point, Santa Cruz County, California, is extremely varied, with sandy flats, boulder fields, faults, and complex bedrock ridges. These ridges support rich marine ecosystems; some of them form the "reefs" that produce world-class surf breaks. Colors indicate seafloor depth, from red-orange (about 2 meters or 7 feet) to magenta (25 meters or 82 feet)
Authors
Curt D. Storlazzi, Nadine E. Golden, Helen Gibbons

Biogeographic perspective of speciation among desert tortoises in the genus Gopherus: a preliminary evaluation Biogeographic perspective of speciation among desert tortoises in the genus Gopherus: a preliminary evaluation

The enduring processes of time, climate, and adaptation have sculpted the distribution of organisms we observe in the Sonoran Desert. One such organism is Morafka’s desert tortoise, Gopherus morafkai. We apply a genomic approach to identify the evolutionary processes driving diversity in this species and present preliminary findings and emerging hypotheses. The Sonoran Desert form of the...
Authors
Taylor Edwards, Mercy Vaughn, Cristina Melendez Torres, Alice E. Karl, Philip C. Rosen, Kristin H. Berry, Robert W. Murph

Unpaved road dust management, a successful practitioner’s handbook Unpaved road dust management, a successful practitioner’s handbook

This handbook provides broad programmatic aspects of unpaved road management. It is based on observations made during a national scan tour and provides useful and insightful excerpts of realworld examples and includes practical how-to instructions for determining what type of treatment may be needed for different situations. It ultimately strives to encourage road managers to think...
Authors
David Jones, Angela Kociolek, Roger Surdahl, Peter Bolander, Bruce Drewes, Matthew Duran, Laura Fay, George Huntington, David James, Clark Milne, Mark Nahra, Andrew Scott, Bob Vitale, Bethany Williams

Application of ground-truth for classification and quantification of bird movements on migratory bird habitat initiative sites in southwest Louisiana: final report Application of ground-truth for classification and quantification of bird movements on migratory bird habitat initiative sites in southwest Louisiana: final report

This project was initiated to assess migrating and wintering bird use of lands enrolled in the Natural Resources Conservation Service’s (NRCS) Migratory Bird Habitat Initiative (MBHI). The MBHI program was developed in response to the Deepwater Horizon oil spill in 2010, with the goal of improving/creating habitat for waterbirds affected by the spill. In collaboration with the University...
Authors
Wylie C. Barrow, Michael J. Baldwin, Lori A. Randall, John Pitre, Kyle J. Dudley

User's guide and metadata for WestuRe: U.S. Pacific Coast estuary/watershed data and R tools User's guide and metadata for WestuRe: U.S. Pacific Coast estuary/watershed data and R tools

Overview There are about 350 estuaries along the U.S. Pacific Coast (U.S. Fish andWildlife 2011). Basic descriptive data for these estuaries, such as their size and watershed area, are important for coastal-scale research and conservation planning. However, this information is spread among many sources, making it difficult to find and standardize. The goal of the WestuRe Project is to...
Authors
M.R. Frazier, D.A. Reusser, H. Lee, L.M. McCoy, C. Brown, W. Nelson
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