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Full-Text Articles in Life Sciences

Rates Of Algal Production And Sphaerotilus Assimilation In The Logan River, Utah, Gary D. Beers May 1969

Rates Of Algal Production And Sphaerotilus Assimilation In The Logan River, Utah, Gary D. Beers

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The rates of algal production and Sphaerotilus assimilation in the lower Logan River benthos were investigated in 1966 and 1967.

The rate of annual gross primary production (3,416 Kcal/m2/yr) was estimated from the relation of pigments to the photosynthetic rate of benthic communities in a submersible, metabolism chamber. The photosynthetic rate was predicted with high precision when a measure of the accessory pigments (D480/D665 and/or chlorophyll-c) was considered with the chlorophyll-a. The pigment density estimates were obtained from the community present on paraffin-coated, concrete hemispheres after immersion in the river for periods ranging from 11 to 20 …


Microenvironmental Effects Of Erosion Control Treatments On Seedling Survival In A Southeastern Utah Salt Desert Area, Ross W. Wein May 1969

Microenvironmental Effects Of Erosion Control Treatments On Seedling Survival In A Southeastern Utah Salt Desert Area, Ross W. Wein

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

A study of the microclimate of erosion control treatments was carried out in two habitat types in a semiarid southeastern Utah, salt desert shrub area. The soils are highly eroded Mancos shale and support a low density of salt desert shrub species which offers little protection against high intensity summer convectional rainstorms.

Gully plugs and contour furrows had been installed by the Bureaus of Reclamation and Land Management to prevent runoff of soil laden water which results from these summer rainfalls. Formerly this sediment was carried to the Colorado River and deposited in Lake Powell.

The purpose to t he …


The Effects Of Some Silvicultural And Soil Treatments On Aspen (Populus Tremuloides Michx.) Reproduction In Northern Utah, Calvin O. Baker Jan 1969

The Effects Of Some Silvicultural And Soil Treatments On Aspen (Populus Tremuloides Michx.) Reproduction In Northern Utah, Calvin O. Baker

Aspen Bibliography

No abstract provided.


The Effect Of Cattle, Sheep, And Other Factors On Aspen (Populus Tremuloides) Reproduction After Clear-Cut Logging In Southern Utah, Paul A. Lucas Jan 1969

The Effect Of Cattle, Sheep, And Other Factors On Aspen (Populus Tremuloides) Reproduction After Clear-Cut Logging In Southern Utah, Paul A. Lucas

Aspen Bibliography

No abstract provided.


Populus: A Bibliography Of World Literature, 1854-1963, R.E. Farmer Jr., J.S. Mcknight Jan 1969

Populus: A Bibliography Of World Literature, 1854-1963, R.E. Farmer Jr., J.S. Mcknight

Aspen Bibliography

No abstract provided.