Factors Influencing Soil Moisture and Plant Community Distribution on Niwot Ridge, Front Range, Colorado, U.S.A.

1986 ◽  
Vol 18 (1) ◽  
pp. 83 ◽  
Author(s):  
Scott A. Isard
Keyword(s):  
Soil Moisture ◽  
Plant Community ◽  
Front Range ◽  
Niwot Ridge ◽  
Factors Influencing

scholarly journals Ecological and floristic characteristics of the new subassociation Aceri heldreichii-fagetum subass. Carpinetosum betuli on mt. Rudnik

2009 ◽  
pp. 179-190
Author(s):  
Marko Perovic ◽  
Rade Cvjeticanin
Keyword(s):  
Soil Moisture ◽  
Plant Community ◽  
Soil Acidity ◽  
Central European ◽  
Light Requirements ◽  
Temperature Requirements ◽  
Floristic Characteristics ◽  
Biological Spectrum

Ecological and floristic characteristics of the new subassociation of the Balkan beech and Greek maple plant community with hornbeam (Aceri heldreichii-Fagetum subass. carpinetosum betuli) were studied. This subassociation is recorded and described on Mt. Rudnik, where it occurs at the elevations 950- 1,050 m, on moderate to steep inclinations (10-30?), and cold aspects: northern, northwestern and northeastern. Bedrock consists of sandstones and mudstones. The biological spectrum, ecological spectra and spectrum of distribution types of this community were calculated. The community has phanerophyte-hemicryptophyte character, it is mesophilous regarding soil moisture requirements and temperature requirements, it is neutrophilous to soil acidity, according to light requirements it is tolerant to semi-tolerant. The most numerous group of distribution types is Central European, which confirms the mesophilous character of this community.

Factors influencing the concentration of gas phase hydrogen peroxide during the summer at Niwot Ridge, Colorado

1995 ◽  
Vol 100 (D11) ◽  
pp. 22831 ◽  
Author(s):  
B. A. Watkins ◽  
D. D. Parrish ◽  
M. Trainer ◽  
R. B. Norton ◽  
J. E. Yee ◽  
...  
Keyword(s):  
Hydrogen Peroxide ◽  
Gas Phase ◽  
Niwot Ridge ◽  
Factors Influencing

Factors influencing the development of bacterial blight of peas.

1954 ◽  
Vol 5 (3) ◽  
pp. 365 ◽  
Author(s):  
DC Wark
Keyword(s):  
Soil Moisture ◽  
Low Temperature ◽  
Moisture Content ◽  
Bacterial Blight ◽  
Soil Moisture Content ◽  
Atmospheric Humidity ◽  
Disease Symptoms ◽  
High Soil Moisture ◽  
Factors Influencing ◽  
Number Of Bacteria

Garden peas commonly carry a nucleus of plants with bacterial blight (Pseudomonas pisi Sackett) in a masked form. When such plants were exposed to low temperature, either by natural frosting or by dipping the tops of the plants in cold liquids, the number of bacteria in the tissues increased rapidly and typical symptoms of the disease occurred in a few days. Soil type and soil moisture content also influenced the development of the disease, which was more marked in peas grown on a red loam from the Dickson Experiment Station than in peas grown on a prepared potting soil. Disease symptoms developed more rapidly a t high soil moisture content than at lower soil moisture content, following exposure to high atmospheric humidity.

Post-fire soil fluxes of CO2, CH4 and N2O along the Colorado Front Range

2011 ◽  
Vol 20 (7) ◽  
pp. 838 ◽  
Author(s):  
Mark A. Gathany ◽  
Ingrid C. Burke
Keyword(s):  
Soil Moisture ◽  
Ponderosa Pine ◽  
Fire Severity ◽  
Colorado Front Range ◽  
Front Range ◽  
Soil Co2 Flux ◽  
Ponderosa Pine Forests ◽  
Time Since Fire ◽  
Wide Range ◽  
Ch4 And N2o

Wildfires affect Rocky Mountain ecosystems across a wide range of spatial and temporal scales. Many of the resulting changes are greatest for environmental factors, such as substrate and microclimate that control exchanges of greenhouse gases. We investigated this link to understand how time since fire influences the cycling of these gases through ponderosa pine forests. We measured and compared trace gas flux rates between recently burned sites and topographical aspects (north- and south-facing slopes). We calculated the ability of five factors (soil temperature, soil moisture, fire severity, aspect and time since fire) to describe the variability in the flux rates. Our study revealed that carbon dioxide (CO2) fluxes were significantly different between sites; however, methane (CH4) uptake was not different between sites or aspects. Nitrous oxide (N2O) fluxes had a significant interaction between site and aspect. Using a likelihood approach, we determined the strength of support in the data for model combinations of five variables. Of these, the single variable models soil moisture, time since fire and severity best described the CO2, CH4, and N2O flux data respectively. Our data show that following a forest fire in the Colorado Front Range, >98% of the global warming potential of the measured soil–atmosphere fluxes is contributed by the soil CO2 flux.

scholarly journals Factors Influencing Nitrogenase Activity (Acetylene Reduction) by Root Nodules of Groundnut, Arachis hypogaea L.

1983 ◽  
Vol 10 (1) ◽  
pp. 26-29 ◽  
Author(s):  
P. T. C. Nambiar ◽  
P. J. Dart
Keyword(s):  
Soil Moisture ◽  
Environmental Factors ◽  
Acetylene Reduction ◽  
Nitrogenase Activity ◽  
Root Nodules ◽  
Activity Period ◽  
Diurnal Fluctuation ◽  
Factors Influencing ◽  
Arachis Hypogaea L ◽  
Reduction Assay

Abstract Acetylene reduction assay, used to measure nitrogenase activity of legume root nodules, is influenced by environmental factors, which limit its application. The effects of some of the environmental factors on acetylene reduction by groundnut root nodules are described. The activity was nonlinear during the first hour of incubation. Assay temperature above 25 C decreased the activity. Washing the nodulated roots prior to the assay also decreased the activity. The activity was influenced by light intensity, soil moisture, and moisture content in the incubation bottle. Diurnal fluctuation with one maximum and one minimum activity period during a 24 hour cycle was observed. Nitrogenase activity was higher during the postrainy season compared to that of the rainy season. A virginia cultivar Kadiri-71 had higher nitrogenase activity than a dwarf valencia cultivar, MH 2.

Factors influencing spatial heterogeneity of soil moisture content in a small catchment of Mount Taiyue, Shanxi Province

2017 ◽  
Vol 37 (11) ◽  
Author(s):  
王甜 WANG Tian ◽  
康峰峰 KANG Fengfeng ◽  
韩海荣 HAN Hairong ◽  
程小琴 CHENG Xiaoqin ◽  
白英辰 BAI Yingchen ◽  
...  
Keyword(s):  
Soil Moisture ◽  
Moisture Content ◽  
Spatial Heterogeneity ◽  
Soil Moisture Content ◽  
Shanxi Province ◽  
Small Catchment ◽  
Factors Influencing
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