The purpose of this study was to study in some detail
host factors which influence the population dynamics of
bark beetle. The dissertation objectives were to ascertain
the applicability of utilizing osmotic pressure
values and relative turgidity values of phloem tissue as
indicators which reflect upon the physiological profile
of...
To quantify the reproductive behavior of male and female gray-tailed
voles, Microtus canicaudus, under conditions of natural
estrus, sexually experienced pairs were observed in a standardized
behavior test for 10 hours. The total duration of sexual
interactions averaged 223 minutes, which is considerably longer than
previously published reports on microtines....
This compilation follows the Fifty-Seven-Year Index to the Sierra Club Bulletin annuals, 1893-1949, compiled by Dorothy H. Bradley and George Shochat and published by the Club in 1952. This index covers the monthly issues from 1950 through 1976 as well as the annuals, which were dated as monthly issues but...
Swamp rice offers tropical populations the most feasible means
of obtaining a dependable and plentiful supply of protein-rich cereals.
An acre of swamp rice land will support many persons and the crop
does not cause erosion. A further production of this type of rice appears
warranted in Sierra Leone and...
I conducted a study to identify potential spawning habitat for anadromous salmonids above a 60-year-old hydropower dam in the headwaters of the North Umpqua River in Oregon. Like many other historical salmonid-bearing rivers, little documentation exists for anadromous fish presence above potential natural obstacles upstream of Soda Springs Dam. My...
Artificial reefs create less productive fish communities than their natural counterparts mostly due to differences in habitat complexity and food potential. Are there other factors contributing to this decrease in productivity, such as the material of the habitat? I tested the response of the tidepool sculpin, Oligocottus maculatus, to man-made...
Full Text:
SCULPIN AND MICROHABITAT CHOICE
By Sierra Payne
INTRODUCTION
BACKGROUND
• Fisheries declining
Artificial reefs create less productive fish communities than their natural counterparts mostly due to differences in habitat complexity and food potential. Are there other factors contributing to this decrease in productivity, such as the material of the habitat? I tested the response of the tidepool sculpin, Oligocottus maculatus, to man-made...
Full Text:
SCULPIN AND MICROHABITAT CHOICE
By Sierra Payne
1
INTRODUCTION
2
BACKGROUND
• Fisheries
Pseudomonas is a diverse genus of Gram-negative bacteria that includes pathogens of plants, insects, and humans as well as environmental strains with no known pathogenicity. Pseudomonas fluorescens itself encompasses a heterologous group of bacteria that are prevalent in soil and on foliar and root surfaces of plants. Some strains of...
Despite the importance of tropical forest ecosystems in the global carbon cycle, there have been few studies of carbon dynamics in this biome. The magnitude of carbon stocks in the tropics and their changes over time are poorly known since ground-based observations are lacking. In this study, total carbon stocks...