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Keyword: microbial biomass

Distribution and abundance of microbial biomass in Rocky Mountain spring snowpacks

Publications Posted on: May 28, 2015
Snowpacks in both Colorado and Wyoming were sampled on 15 dates for total microbial biomass, ratio of bacteria to fungi, and major inorganic ions. Levels of viable microbial biomass remained low throughout the period, peaking at 0.05 micrograms carbon/mi. Microscopic analyses indicated this biomass was composed primarily of bacteria. Fungi were not detected in samples taken at or above treeline.

Carbon and nitrogen cycling in southwestern ponderosa fine forests

Publications Posted on: May 14, 2013
Ponderosa pine forests of the southwestern United States were historically characterized by relatively open, parklike stands with a bunchgrass-dominated understory. This forest structure was maintained by frequent, low-intensity surface fires. Heavy livestock grazing, fire suppression, and favorable weather conditions following Euro-American settlement in the late 19th century resulted in a dramatic increase in pine regeneration.

Do changes in soil properties after rooting by wild boars (Sus scrofa) affect understory vegetation in Swiss hardwood forests?

Publications Posted on: May 29, 2012
Recovering from small fragmented populations, wild boars (Sus scrofa L.) have considerably increased their numbers and their habitat range in many European countries during the past two decades. Although several studies have focused on the impact of wild boar rooting on selected vegetation properties, little is known about effects on entire forest ecosystems.

Grubbing by wild boars (Sus scrufa L.) and its impact on hardwood forest soil carbon dioxide emissions in Switzerland

Publications Posted on: September 30, 2010
Interest in soil C storage and release has increased in recent years. In addition to factors such as climate/land-use change, vertebrate animals can have a considerable impact on soil CO2 emissions. To date, most research has considered herbivores, while the impact of omnivorous animals has rarely been investigated.

Influences of thinning, prescribed burning, and wildfire on soil processes and properties in southwestern ponderosa pine forests: A retrospective study

Publications Posted on: May 05, 2009
Following Euro-American settlement in the late 1800s, fire suppression and livestock grazing in ponderosa pine-bunchgrass ecosystems of the southwestern US resulted in the replacement of grass openings with dense stands of ponderosa pine.

Season mediates herbivore effects on litter and soil microbial abundance and activity in a semi-arid woodland

Publications Posted on: May 05, 2009
Herbivores can directly impact ecosystem function by altering litter quality of an ecosystem or indirectly by shifting the composition of microbial communities that mediate nutrient processes.