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Articles 1 - 13 of 13
Full-Text Articles in Life Sciences
The Reproductive Biology And Edaphic Characteristics Of A Rare, Gynodioecious Saxifage: Saxifraga Bryophora Var. Tobiasiae (Saxifragaceae), Kimberly Pierson
The Reproductive Biology And Edaphic Characteristics Of A Rare, Gynodioecious Saxifage: Saxifraga Bryophora Var. Tobiasiae (Saxifragaceae), Kimberly Pierson
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
I examined the reproductive biology and general ecology of Saxifraga bryophora var. tobiasiae, a rare saxifrage endemic to the West Salmon River Mountains of central Idaho. Saxifraga bryophora var. tobiasiae combines asexual reproduction via bulbils with a sexual mixed-mating system. Flower production occurred in 1996 only, whereas bulbil production occurred in 1995, 1996, and 1997. Bulbil production precedes floral bud formation and is the dominant form of reproduction. When flowering occurs, outcrossing is promoted by protandry and the gynodioecious mating system found in all populations. No autogamous or agamospermous seed set was observed in either female or hermaphrodite flowers, …
Simulation Of Carbon-Nitrogen Cycling During Spring Upwelling In The Cariaco Basin, John J. Walsh, Dwight A. Dieterle, Frank E. Muller-Karger, Richard Bohrer, W. Paul Bissett, Ramon J. Varela, Ruben Aparicio, Rafael Diaz, Robert Thunell, Gordon T. Taylor, Mary I. Scranton, Kent A. Fanning, Edward T. Peltzer
Simulation Of Carbon-Nitrogen Cycling During Spring Upwelling In The Cariaco Basin, John J. Walsh, Dwight A. Dieterle, Frank E. Muller-Karger, Richard Bohrer, W. Paul Bissett, Ramon J. Varela, Ruben Aparicio, Rafael Diaz, Robert Thunell, Gordon T. Taylor, Mary I. Scranton, Kent A. Fanning, Edward T. Peltzer
Marine Science Faculty Publications
Coupled biological-physical models of carbon-nitrogen cycling by phytoplankton, zooplankton, and bacteria assess the impacts of nitrogen fixation and upwelled nitrate during new production within the shelf environs of the Cariaco Basin. During spring upwelling in response to a mean wind forcing of 8 m s(-1), the physical model matches remote-sensing and hydrographic estimates of surface temperature. Within the three-dimensional flow field, the steady solutions of the biological model of a simple food web of diatoms, adult calanoid copepods, and ammonifying/nitrifying bacteria approximate within similar to 9% the mean spring observations of settling fluxes caught by a sediment trap at similar …
Analysis Of Historical Distribution Of Submerged Aquatic Vegetation (Sav) In The James River, Ken Moore, David J. Wilcox, R J. Orth, Eva Bailey
Analysis Of Historical Distribution Of Submerged Aquatic Vegetation (Sav) In The James River, Ken Moore, David J. Wilcox, R J. Orth, Eva Bailey
Reports
Analyses of historical photography and ground surveys dating from the 1930s indicate that approximately 1645 hectares of SAV have been historically present in shallow water regions throughout the James River. This compares to 77 hectares of vegetation reported in 1997 and a James River Tier I SAV restoration goal of 107 hectares (areas mappped with SAV from 1971- 1991). Overall, the temporal and spatial patterns of loss of SAV populations in the James River suggest declines occurred first in the tidal freshwater regions of the upper James beginning approximately 50 years ago, and then subsequently in the lower James beginning …
Wolves And Bears: An Interdisciplinary Activity Guide For Grades 3-5, Susan L. Thomas
Wolves And Bears: An Interdisciplinary Activity Guide For Grades 3-5, Susan L. Thomas
All Graduate Projects
A popular set of "Discovery Boxes" are used by educators across North Central Washington. These boxes are administered by the U.S. Forest Service and focus on such themes as wolves, bears, fire, plants and forests. These boxes are available to be checked out to educators for two-week periods, and reach approximately 9,000 students annually. Each box contains "hands-on" props which enhance the learning of each theme. Some of the boxes have activity guides in them to assist the educator in teaching the theme and thus using the box to its full potential. Two of the most popular boxes, the wolf …
Observations On The Reproductive Biology Of Gerbillus Dasyurus (Wagner, 1842) (Mammalia: Rodentia) In Turkey, Ercüment Çolak, Mustafa Sözen, Nuri̇ Yi̇ği̇t, Şaki̇r Özkurt
Observations On The Reproductive Biology Of Gerbillus Dasyurus (Wagner, 1842) (Mammalia: Rodentia) In Turkey, Ercüment Çolak, Mustafa Sözen, Nuri̇ Yi̇ği̇t, Şaki̇r Özkurt
Turkish Journal of Zoology
The reproductive data along with some ecological observations of Gerbillus dasyurus are reported based on field studies and investigations in captivity. The findings indicate that the favorable habitat of G. dasyurus is rocky areas with sparse vegetated soil and that the reproduction period extends from January to September. According to the reproductive data, the average weight at birth is 2.22 g., litter size ranges from 3 to 9, with an average of 5.66, a female gives three litters during a reproduction period. The eyes and ears also open at 16 days, weaning takes place at 32 days, and they become …
The Taxonomy And Ecology Of Mauremys Caspica Rivulatavalenciennes, 1833 (Testudinata: Bataguridae) And Testudo Graeca Ibera Pallas, 1811 (Testudinata: Testudinidae) On Resadiye (Datça) Peninsula, Cemal Varol Tok
Turkish Journal of Zoology
In this survey, the tortoise and turtle fauna of Resadiye (Datça) Peninsula, which has not previously been studied in detail, is given. Mauremys caspica rivulata and Testudo graeca ibera specimens were collected as museum material or released after their measurements were taken, from four and nine localities respectively, establishing the status of the peninsula's testudine fauna. A total of 30 adult and eight juvenile specimens were studied morphologically. Observations on the ecological and biological characteristics of the testudines are also given.
Patella Species (Archaeogastropoda) Distributed In Saros Bay (Northest Aegean Sea), Bi̇lal Öztürk, Zeki̇ Ergen
Patella Species (Archaeogastropoda) Distributed In Saros Bay (Northest Aegean Sea), Bi̇lal Öztürk, Zeki̇ Ergen
Turkish Journal of Zoology
The present study has been carried out in order to determine the Patella species distributed in Saros Bay located on the northest of the Aegean Sea. For this purpose, 3 stations in the north and 3 stations in the south of the bay were chosen and a total of 340 specimens were collected from the 6 stations. In each station, 2 m2 of sampling area was considered. As a result of the taxonomic examinations based on the radula teeth, the Patella genera was represented by three species (Patella caerulea, Patella ulyssiponensis and Patella rustica) in Saros Bay. It was determined …
A Morphological Investigation On The Anuran Species Of The Reşadiye (Datça) Peninsula (Anura: Bufonidae, Hylidae, Ranidae), Cemal Varol Tok
A Morphological Investigation On The Anuran Species Of The Reşadiye (Datça) Peninsula (Anura: Bufonidae, Hylidae, Ranidae), Cemal Varol Tok
Turkish Journal of Zoology
In this survey the amphibian fauna of Reşadiye (Datça) Peninsula, which has not been studied in detail so far, is given. No urodelan species has been encountered during the present work; but the presence of four different species belonging to three anuran families is established. Bufo bufo, Bufo viridis, Hyla arborea and Rana ridibunda specimens were collected from two, five, three and six different localities respectively, establishing the status of the peninsula's anura fauna. A total of 125 adult and two juvenile specimens were studied morphologically. Some observations on the ecological and biological characteristics of the anurans are also given.
A Spatial And Temporal Analysis Of Riparian Vegetation Along Satus Creek On The Yakama Indian Reservation, Kathryn Gellenbeck
A Spatial And Temporal Analysis Of Riparian Vegetation Along Satus Creek On The Yakama Indian Reservation, Kathryn Gellenbeck
All Master's Theses
Satus Creek provides critical habitat for the Yakima River Basin steelhead. A diverse community of riparian vegetation is important for healthy fish habitat; vegetation changes can affect shade, cover, channel structure, water quality, and food availability. The purpose of this thesis is to analyze and illustrate riparian vegetation change, both temporally and spatially, along three separate reaches of Satus Creek. A Geographic Information Systems approach was applied to assess the vegetation change by comparing plant species composition and density on 1949 and 1995 aerial photographs. The GIS approach allowed patterns and trends in the vegetation to be identified. In less …
An Investigation On The Morphology, Anatomy And Ecology Oforiganum Onites L.1, Ahmet Gönüz, Bilkan Özörgücü
An Investigation On The Morphology, Anatomy And Ecology Oforiganum Onites L.1, Ahmet Gönüz, Bilkan Özörgücü
Turkish Journal of Botany
Possible variations in the morphology, anatomy, ecology and phenology of Origanum onites L. ( Lamiaceae/Labitae) in rela-tion to altitudinal variations was studied together with the differences in etheric oil content. A decrease in the stem and lower leaf lengths was observed compared with an increase in the cortical area and vascular tissues in parallel with altitudinal increases. The number and size of stomata also varied with this factor. Etheric oil content was found to be different in relation to altitude.
On The Lizards Of The Reşadiye (Datça)Peninsula, Cemal Varol Tok
On The Lizards Of The Reşadiye (Datça)Peninsula, Cemal Varol Tok
Turkish Journal of Zoology
Eleven species from six families of lizards have been found in the Reşadiye (Datça)Peninsula between the years 1990-1993.In this survey the morphological characteristics such as pholodisis,color-pattern and body measurements and ratios have been investigated.Systematic positions the species of which we have a sufficient number of samples were more accurate in terms of morfhological characteristics. Besides,the biological and ecological information on the species were also given.
Methods In Historical Ecology: A Case Study Of Tintic Valley, Utah, Jeffrey A. Creque, Neil E. West, James P. Dobrowolski
Methods In Historical Ecology: A Case Study Of Tintic Valley, Utah, Jeffrey A. Creque, Neil E. West, James P. Dobrowolski
Wildland Resources Faculty Publications
Through use of repeat photography, archival research, and field observation to reconstruct landscape vegetation patterns and changes across a 120 year period in the upper Tintic Valley of central Utah, researchers found significant changes in landscape vegetation pattern over time, including change in pinyon-juniper woodland area. Previously reported massive woodland harvest associated with early mining, domestic and agricultural activities elsewhere in the Intermountain West also took place in Utah. The impact on woodland area of the agricultural "bull" fence alone was significant. More recent study area woodland expansion also occurred. Because intensive industrial activity associated with development of the Tintic …
Resource Allocation And Sucrose Mobilization In Light Limited Eelgrass Zostera Marina, Teresa Alcoverro, Richard C. Zimmerman, Donald G. Kohrs, Randall S. Alberte
Resource Allocation And Sucrose Mobilization In Light Limited Eelgrass Zostera Marina, Teresa Alcoverro, Richard C. Zimmerman, Donald G. Kohrs, Randall S. Alberte
OES Faculty Publications
This study evaluated the ability of Zostera marina L. (eelgrass) to balance the daily photosynthetic deficit by mobilization of carbon reserves stored in below-ground tissues during a period of extreme winter light limitation. A quantitative understanding of the mobilization process and its limitations is essential to the development of robust models predicting minimum light levels required to maintain healthy seagrass populations. Plants were grown in running seawater tanks under 2 light regimes. One treatment was provided with 2 h irradiance-saturated photosynthesis (Hsat) to produce severe Light Limitation, while control plants were grown under 7 h Hsat, …