Publications
Filter Total Items: 1994
Western Juniper Field Guide: Asking the Right Questions to Select Appropriate Management Actions
Introduction
Strong evidence indicates that western juniper has significantly expanded its range since the late 1800s by encroaching into landscapes once dominated by shrubs and herbaceous vegetation (fig. 1). Woodland expansion affects soil resources, plant community structure and composition, water, nutrient and fire cycles, forage production, wildlife habitat, and biodiversity. Goals of juni
Authors
R.F. Miller, J.D. Bates, T.J. Svejcar, F.B. Pierson, L.E. Eddleman
Landbird Monitoring Protocol for National Parks in the North Coast and Cascades Network
This protocol narrative outlines the rationale, sampling design and methods for monitoring landbirds in the North Coast and Cascades Network (NCCN) during the breeding season. The NCCN, one of 32 networks of parks in the National Park System, comprises seven national park units in the Pacific Northwest, including three large, mountainous, natural area parks (Mount Rainier [MORA] and Olympic [OLYM]
Authors
Rodney B. Siegel, Robert L. Wilkerson, Kurt J. Jenkins, Robert C. Kuntz, John R. Boetsch, James P. Schaberl, Patricia J. Happe
Science Review for the Scott Bar Salamander (Plethodon asupak) and the Siskiyou Mountains Salamander (P. stormi): Biology, Taxonomy, Habitat, and Detection Probabilities/Occupancy
The Plethodon elongatus Complex in the Klamath-Siskiyou Ecoregion of southern Oregon and northern California includes three species: the Del Norte salamander, Plethodon elongatus; the Siskiyou Mountains salamander, P. stormi; and the Scott Bar salamander, P. asupak. This review aims to summarize the current literature and information available on select topics for P. stormi and P. asupak. These ar
Authors
Douglas J. DeGross, R. Bruce Bury
Size of the California Brown Pelican Metapopulation During a Non-El Nino Year
Overall, we estimated a total metapopulation within the geographical range of the California brown pelican subspecies (Pelecanus occidentalis californicus) as about 70,680 ? 2,640 breeding pairs (mean ? SD). Little change in at least three decades is indicated in the total metapopulation south of the Southern California Bight (SCB) subpopulation, but significant improvements in the breeding subpop
Authors
Daniel W. Anderson, Charles J. Henny, Carlos Godinez-Reyes, Franklin Gress, Eduardo L. Palacios, Karina Santos del Prado, James Bredy
Population size and trends for nesting ospreys in northwestern Mexico: Region-wide surveys, 1977, 1992/1993 and 2006
We used a double-sampling technique (air plus ground survey) in 2006, with partial double coverage, to estimate the present size of the osprey (Pandion haliaetus) nesting population in northwestern Mexico. With the exception of Natividad, Cedros, and San Benito Islands along the Pacific Coast of Baja California, all three excluded from our coverage in 2006 due to fog, this survey was a repeat of p
Authors
Charles J. Henny, Daniel W. Anderson, Aradit Castellanos Vera, Jean-Luc E. Carton
Protocol for Landsat-Based Monitoring of Landscape Dynamics at North Coast and Cascades Network Parks
Background and Objectives
As part of the National Park Service's larger goal of developing long-term monitoring programs in response to the Natural Resource Challenge of 2000, the parks of the North Coast and Cascades Network (NCCN) have determined that monitoring of landscape dynamics is necessary to track ecosystem health (Weber and others, 2005). Landscape dynamics refer to a broad suite of
Authors
Robert E. Kennedy, Warren B. Cohen, Alan A. Kirschbaum, Erik Haunreiter
Interim Summary: Nesting Counts of Ospreys and Brown Pelicans in Northwestern Mexico, 2006
The distribution and abundance of nesting populations of California brown pelicans (Pelecanus occidentalis californicus) and ospreys (Pandion haliaetus) were documented in 2006 in northwestern Mexico. For ospreys only, the 2006 data were compared to population estimates from two previous surveys (one conducted in 1977 and another conducted in the period 1992-1993). Overall, the total osprey nestin
Authors
Charles J. Henny, Daniel W. Anderson
Pygmy rabbit surveys on state lands in Oregon
The pygmy rabbit (Brachylagus idahoensis) is classified by the federal government as a species of concern (i.e., under review by the U.S. Fish and Wildlife Service for consideration as a candidate for listing as threatened or endangered under the Endangered Species Act) because of its specialized habitat requirements and evidence of declining populations. The Oregon Department of Fish and Wildlife
Authors
Joan Hagar, George Lienkaemper
Assessment and management of dead-wood habitat
The Bureau of Land Management (BLM) is in the process of revising its resource management plans for six districts in western and southern Oregon as the result of the settlement of a lawsuit brought by the American Forest Resource Council. A range of management alternatives is being considered and evaluated including at least one that will minimize reserves on O&C lands. In order to develop the bas
Authors
Joan Hagar
Longitudinal patterns of fish assemblages, aquatic habitat, and water temperature in the Lower Crooked River, Oregon
The Lower Crooked River is a remarkable groundwater-fed stream flowing through vertical basalt canyons in the Deschutes River Valley ecoregion in central Oregon (Pater and others, 1998). The 9-mile section of the river between the Crooked River National Grasslands boundary near Ogden Wayside and river mile (RM) 8 is protected under the National Wild and Scenic Rivers Act (16 U.S.C. 1271-1287) for
Authors
Christian E. Torgersen, David P. Hockman-Wert, Douglas S. Bateman, David W. Leer, Robert E. Gresswell
Fish movement ecology in high gradient headwater streams: Its relevance to fish passage restoration through stream culvert barriers
Restoration of fish passage through culvert barriers has emerged as a major issue in the Pacific Northwest and nationwide, in part, because of their potential influence on fish movement. Movement is an essential mechanism by which mobile animals acquire the resources necessary for the successful completion of their life-cycles. In this report, we provide a brief review of some essential characteri
Authors
Robert L. Hoffman, Jason B. Dunham
Rainforest birds: A land manager's guide to breeding bird habitat in young conifer forests in the Pacific Northwest
This document (hereafter Guide) has been prepared to assist land managers interested in conducting conservation and management activities to benefit breeding birds associated with young conifer forests in the Pacific Northwest. Audiences targeted for use of the Guide include land trusts, watershed councils, non-commercial private land owners, forest products companies, land-managing conservation o
Authors
Bob Altman, Joan Hagar