Publications
Below is a list of WERC's peer-reviewed publications. If you are searching for a specific publication and cannot find it in this list, please contact werc_web@usgs.gov
Filter Total Items: 3743
Prey preference and seasonal predation by oystercatchers on limpets at San Nicolas Island, California, USA Prey preference and seasonal predation by oystercatchers on limpets at San Nicolas Island, California, USA
No abstract available.
Authors
D. R. Lindberg, K.I. Warheit, J. A. Estes
Seed germination patterns of Salvia mellifera in fire-prone environments Seed germination patterns of Salvia mellifera in fire-prone environments
Salvia mellifera seeds from coastal sage, chaparral and desert scrub in southern California failed to germinate in the dark unless exposed to powdered charred wood. This pattern was observed for seeds given a one month stratification at 5 C and for ones not stratified and also for seeds incubated under continuous 23 C or a diurnal alternation of 13 C/23 C. Dark inhibition of germination...
Authors
Jon E. Keeley
Foraging strategies of Glaucous-winged Gulls in rocky intertidal communities Foraging strategies of Glaucous-winged Gulls in rocky intertidal communities
No abstract available.
Authors
David B. Irons, Robert G. Anthony, James A. Estes
Status of a translocated sea otter population and its habitat in Washington Status of a translocated sea otter population and its habitat in Washington
During the summers of 1969 and 1970, the Alaska Department of Fish and Game and the Washington Department of Game translocated 59 sea otters from Amchitka Island, Alaska, to release sites in Washington (Jameson et al. 1982, Wildl. Soc. Bull. 10:100-107). Of the 29 released near Pt. Grenvil (Fig. 1) in 1969, 16 are known to have died. In 1970, 30 otters were held in a floating enclosure...
Authors
Ronald J. Jameson, Karl W. Kenyon, S. Jeffries, Glenn R. VanBlaricom
Activity-time budgets of sea otters in California Activity-time budgets of sea otters in California
Daily time budgets and activity patterns of sea otters (Enhydra lutris) were determined by scan sampling at 4 study areas in central California. Diet was determined by direct observation of foraging animals. Average time invested in foraging ranged from 11 to 71% among viewing areas (1-2 km of coastline) and from 21 to 28% among study areas (8-10 km of coastline). Foraging time budgets...
Authors
James A. Estes, Karen E. Underwood, Margit J. Karmann
Demographic structure of chaparral under extended fire-free conditions Demographic structure of chaparral under extended fire-free conditions
No abstract available.
Authors
Jon E. Keeley, A. Brooks, T. Bird, S. Cory, H. Parker, E. Usinger
Demographic patterns of the shrub Ceanothus megacarpus in an old stand of chaparral in the Santa Monica Mountains Demographic patterns of the shrub Ceanothus megacarpus in an old stand of chaparral in the Santa Monica Mountains
Wildfires have had a major influence on the structural and functional adaptations that have evolved in Mediterranean-type ecosystems. Some chaparral shrubs sprout after fires while others produce serotinous cones or seeds refractory to germination until they are cued by a fire. Ceanothus megacarpus is a sclerophylous shrub commonly found in California in either pure of mixed stands which...
Authors
T. M. Montygierd-Loyba, Jon E. Keeley
Long-term on-site and off-site effects of logging and erosion in the Redwood Creek basin, northern California Long-term on-site and off-site effects of logging and erosion in the Redwood Creek basin, northern California
For nearly 15 years, the Redwood Creek Watershed in north coastal California has been the focus of both U.S. Geological Survey (USGS) and National Park Service (NPS) studies designed to document and quantify the nature of erosion, sedimentation and sediment transport processes active in the basin. While none of these studies were specifically designed to assess possible cumulative...
Authors
Danny K. Hagans, William E. Weaver, Mary Ann Madej
Physio-chemical processes affecting copper, tin and zinc toxicity to algae: A review Physio-chemical processes affecting copper, tin and zinc toxicity to algae: A review
This chapter focuses on the physic-chemical processes affecting copper, zinc, and tin toxicity to algae. Both Cu and Zn are essential algal micronutrients, cofactors in numerous biochemical processes. The availability of a nutrient or toxic substance can be significantly affected by precipitation. Methods for modeling the effects of adsorption–desorption reactions have been previously...
Authors
James S. Kuwabara
An evaluation of land use, hydrology, and sediment yield in the Mill Creek watershed An evaluation of land use, hydrology, and sediment yield in the Mill Creek watershed
No abstract available at this time
Authors
Mary Ann Madej, C. O’Sullivan, N. Varnum
Recent channel adjustments in Redwood Creek, California Recent channel adjustments in Redwood Creek, California
No abstract available at this time
Authors
N. Varnum, V. Ozaki
Management implications of winter food habits of northern pintails in California Management implications of winter food habits of northern pintails in California
No abstract available at this time
Authors
M. R. Miller