Now showing items 31-40 of 706
Intra-umbel geitonogamy and umbel size in a natural population of Common Milkweek (Asclepias syriaca).
(1994)
Geitonogamy may have important consequences for the reproductive success of a self-incompatible, clonal species with a large floral display, such as Common milkweed (Asclepias syriaca). It is suggested that there is a high ...
A demographic comparison between Caucasian and Native American communities in Cheboygan and Emmet Counties, 1850-present.
(1999)
Demographic studies are typically used to evaluate the changes in a population relating to mortality, natality, and migration. For some human communities the conditions of the natural environment are not the only factors ...
Factors affecting the size of Drosera rotundifolia in fens and bogs.
(1996)
Due to a high tolerance for variations in resource availability, generalist species have the ablility to survive in a variety of habitats. However, survival does not equal success. One habitat may have optimum conditions ...
A comparison of the algal community structure on cases of three caddisfly genera.
(1994)
This study compared the algal diversities upon the cases of three caddisfly genera, Pycnopsyche, Brachycentrus and Glossosoma. Between eight and ten larvae from each genus were removed from submerged logs, in the Maple ...
Lost Lake comparative lake survey.
(1999)
The focus of this study is the trophic status of Lost Lake. Lost Lake is a solution lake in Otsego Co., MI. The study occurred on July 17, 1999. Nutrients, macrophytes, and macroinvertebrates were collected and analyzed ...
Grapevine Point nature trail and interpretive booklet, final project report.
(1992)
Recognizing the need for improvement of trails at the University of Michigan Biological Station (UMBS), the Mark and Ruth Paddock Habitat Fund was established specifically for this purpose. In August 1992, four students ...
Intraclutch variation in egg component mass and determination of clutch size in House Sparrows.
(1992)
Intraclutch variation in mass of dry yolk, dry albumen, dry shell and water content of House Sparrow eggs were examined during egg laying of the third brood of the summer of 1992 at three farms in northern lower peninsula ...
Risk sensitivity in Archilochus colubris: the effects of differences in mean reward and variance on food choice.
(1991)
Risk sensitivity was tested in the Ruby-throated Hummingbird, ARchilochus colubris, to determine if both changes in mean reward and changes in reward variance affect food choice. The experiment was conducted at the ...
A comparison of the tree growth on roadside edge and interior forests.
(1997)
As the human population continues to grow, the effect of urban sprawl reaches further into previously undisturbed habitats. The increase in the number of roads being built is one of the consequence this growth. This study ...