Results
901 - 925 of 1229 Items << < 32 33 34 35 36 37 38 39 40 41 > >>
901 - 925 of 1229 Items << < 32 33 34 35 36 37 38 39 40 41 > >>
|
This thesis concerns the alteration of the course of selective
protein synthesis and morphogenesis in plants treated with growth
regulating chemicals. Treatment of 48-hour-old "Alaska" pea seedlings
(Pisum sativum L.) with 2, 4-D, IAA, NAA or...
1969-08-15 (iso8601)
|
|
Root rot due to Armillariella mellea (Vahl. ex Fr.)
Karst. is unusually severe in ponderosa pine near Glenwood,
Washington. Isolate relations, clonal variability, vegetation
patterns, and climate were examined in relation to
severity of disease in...
1979-08-31 (iso8601)
|
|
The main objective of this investigation was to evaluate relationships
between the production and utilization of forage and deer
browsing of hand-planted Douglas-fir seedlings. A secondary purpose
was to study some effects of selected physical and...
1964-05-13 (iso8601)
|
|
AIM: Species that breed sympatrically often occupy different foraging niches to
mitigate competition for prey. When resource availability declines at the end of
the breeding season, some animals migrate to regions with more favourable...
2015-02 (iso8601)
|
|
In 2001, an extreme drought tightened water supply in the Upper Klamath Basin (basin) while earlier 2001 increases in Endangered Species Act (ESA) water requirements for basin fish species elevated demands. The Bureau of Reclamation (Reclamation),...
2006-07-19
|
|
For many species of marine turtle the characteristics that define pelagic habitat
have yet to be fully identified. A better understanding of these habitat characteristics is
critical to reduce high seas fisheries interactions with turtles,...
2007-02-05T17:12:04Z (iso8601)
|
|
Studies were conducted in the laboratory and field to determine the substrate relationships of five species of stream insects representing the orders Ephemeroptera, Plecoptera, Trichoptera and Diptera. Various combinations of pebble and sand were...
1974-10-01
|
|
three transcontinental railroads crossing the area provide a ready market for large quantities of ties.
Forest resources are available in the Clark Fork-Clearwater subdivision for expansion of wood-using industries along certain lines. Although...
|
|
The purpose of the 1981 to 1983 monitoring program at the Barbers Point Outfall on Oahu, is two-fold: to describe the benthic community by utilizing micromollusks as index species and to establish a data base for continuing community analysis....
2008-07-17
2008-07-17 1984-03-01 |
|
Title from PDF title screen (viewed on June 13, 2008); Includes bibliographical references;
2024-09-20
2008-08-26 2008-06-19 |
|
Studies with fluorodifen were conducted to gain more information
about its field performance and the influence of light quantity,
quality and timing of exposure on its phytotoxic properties. Uptake
and trans location in three plant species were...
1973-11-30 (iso8601)
|
|
Although European fish consumption is increasingly dependant on aquaculture products given the
decrease of worldwide fisheries landings, the image of farmed fish is more and more controversial. This
paper aims at assessing the importance of farmed...
2006-11 (iso8601)
|
|
Influence of temperature and wood moisture content on
spore germination and colonization of Douglas-fir
(Pseudotsuga jnenziesii) heartwood by Poria carbonica
basidiospores and chlamydospores was studied. Both spore
types germinated and colonized...
1985-02-04 (iso8601)
|
|
With the ongoing crisis of biodiversity loss and limited resources for conservation, the concept of biodiversity hotspots has been useful in determining conservation priority areas. However, there has been limited research into how temporal...
2015-07-22 (iso8601)
|
|
The Colorado River in Glen, Marble, and Grand Canyons is subject to a complex regulatory framework, including the Colorado River Compact, the Endangered Species Act, and the Grand Canyon Protection Act of 1992. Physical, biological, and cultural...
2017-08-01
|
|
Aquatic animals are exposed to a variety of natural and
anthropogenic xenobiotics. Biotransformation of xenobiotics was
examined in three aquatic animals: a primitive mollusc (chiton);
a shellfish which is an important human food source (oyster);...
1989-05-03 (iso8601)
|
|
The spatial ecology of a species is a vital component of informed management and restoration plans, yet little is known about how animals use restored or constructed habitat. We assessed home ranges, core areas, and habitat selection of the...
2011-06-10 (iso8601)
|
|
This collection consists of the papers
of environmental activist Clifton R. Merritt. From 1964 to1978 Merritt served
as Director of Field Services for The Wilderness Society. After leaving The
Wilderness Society, Merritt founded the...
|
|
In many regions of the world, forest management has shifted from practices emphasizing timber production to more sustainable harvesting that integrates ecological values, including maintenance of biodiversity, wildlife habitat, and ecological...
2012-12-01 (iso8601)
|
|
This dissertation describes the epiphyte communities on tall shrubs in forests of
western Oregon, with a focus on potential effects of management practices on these
communities. Shrubs and other hardwoods have recently gained recognition as...
2000-04-07 (iso8601)
|
|
In the highly competitive animal protein market, seafood faces increasing pressure to improve and standardize product quality. While there is general consensus that quality can be improved for many seafood products, there is little agreement on...
2000-12-15 (iso8601)
|
|
study. Others in turn derive great satisfaction in wildlife photography, taking nature hikes, reading about wildlife, and attending lectures and movies. Many other similar activates could be described. And in one way or another, the exercise of...
|
|
Cyclopropenoid fatty acids cause several physiological disorders
in rainbow trout and rats. Rainbow trout appear to be more sensitive
than rats to the effects of cyclopropenoid fatty acids. Carbon-14
labeled sterculic acid with label in the...
1976-06-01 (iso8601)
|
