Publications
This list of publications includes peer-review journal articles, official USGS publications series, reports and more authored by scientists in the Ecosystems Mission Area. A database of all USGS publications, with advanced search features, can be accessed at the USGS Publications Warehouse.
Filter Total Items: 41920
Upland nesting of American bitterns, marsh hawks, and short-eared owls
No abstract available.
Authors
H. F. Duebbert, J. T. Lokemoen
Nationwide residues of mercury, lead, cadmium, arsenic, and selenium in starlings, 1973
Starlings (Sturnus vulgaris) collected in 1973 at 51 sites throughout the continental United States were analyzed for mercury, lead, cadmium, arsenic, and selenium. All samples contained detectable levels of these elements. In general, residues were low: mercury residues ranged from <0.01 to 0.20 ppm: lead, from <0.10 10 3.20 ppm: cadmium, from <0.05 to 0.20 ppm: arsenic, from <0.05 to 1.40 ppm: a
Authors
D. H. White, J. R. Bean, J. R. Longcore
Organochlorine pesticide residues associated with mortality: Addivity of chlordane and endrin
No abstract available.
Authors
J. Larry Ludke
Residues of DDT and DDE in livers of waterfowl, northeastern Louisiana--1970-71
A study was conducted to determine the levels of DDT and DDE in the livers of 10 species of waterfowl collected in Louisiana from 1970 to 1971. Livers of 48 of 50 specimens contained detectable levels of DDT and/or DDE. DDT residues ranged from 0.01 to 10.90 ppm; DDE levels ranged from 0.02 to 38.69 ppm.
Authors
Donald H. White
Mapping of mountain soils west of Denver, Colorado, for landuse planning
No abstract available.
Authors
P. W. Schmidt, Kenneth L. Pierce
Obsidian hydration dating and correlation of Bull Lake and Pinedale Glaciations near West Yellowstone, Montana
The ages of the last two glaciations near West Yellowstone, Montana, can be calculated by obsidian hydration techniques that are calibrated by K-Ar dating of obsidian-bearing lava flows. The average age of glacial abrasion of obsidian in the Pinedale terminal moraines is about 30,000 yr, with most age measurements between 20,000 and 35,000 yr. For the Bull Lake moraines, it is about 140,000 yr, wi
Authors
Kenneth L. Pierce, J. Obradovich, Irving Friedman
Residues of organochlorines and heavy metals in ruddy ducks from the Delaware River, 1973
In December 1973, eight ruddy ducks killed in an oil spill on the Delaware River were collected to be analyzed for residues of environmental pollutants. Whole carcasses were analyzed for organochlorine pesticides and livers were examined for lead, cadmium, and mercury. Residues of polychlorinated biphenyls and DDT and/or its metabolites were present in all carcasses. Dieldrin and hexachlorobenzene
Authors
D. H. White, T. E. Kaiser
Chemical residue content and hatchability of screech owl eggs
Eggs of wild Screech Owls were collected from nests in northwestern Ohio in 1973. One egg was taken from each of 19 nests near the start of incubation. Mean shell thickness in these 19 eggs and mean thickness of 16 unhatched eggs did not differ from 49 archival eggs collected in Ohio and Pennsylvania prior to the widespread use of organochlorine pesticides. Residues were generally low although all
Authors
E. E. Klaas, D. M. Swineford
Rapid diagnostic approaches in the identification of gram-negative bacterial diseases of fish
No abstract available.
Authors
E. B. Shotts, G. L. Bullock
Organochlorine pesticide residues associated with mortality: Additivity of chlordane and endrin
No abstract available.
Authors
J. Larry Ludke
The abundance and diversity of the herpetofaunas of tropical forest litters
Quantitative and qualitative samples of amphibian and lizard faunas were taken from forest litter in Costa Rica and compared with similar samples collected in Borneo, the Philippines, and Panama. Animal abundance is about ten times greater in Costa Rican lowland wet forest than in Borneo. Radically different routes and rates of energy flow are postulated to account for the difference. In a series
Authors
Norman J. Scott
Primates and their habitats in northern Colombia with recommendations for future management and research
This report covers a survey of forests and wild primates carried out by its authors in northern Colombia during May, July, and August 1974. The results of a 1973 field report on this report by Bernstein et al. (1) are also included.
Authors
Norman J. Scott, Thomas T. Struhsaker, Kenneth Glander, Hernano Chiriví