Publications by authors named "Jeffrey R Propster"
Article Synopsis
- - Increased Arctic temperatures are causing permafrost to thaw and enhancing microbial activity in tundra soils, releasing greenhouse gases that further contribute to climate change.
- - A study examining the growth responses of soil bacteria under short-term (3 months) and long-term (29 years) warming found that short-term warming led to a 36% increase in microbial growth rates, while long-term warming resulted in a more significant 151% increase largely among existing taxa.
- - The research highlights that bacteria respond differently to varying durations of warming, suggesting that understanding these microbial reactions is crucial as soil carbon stocks in tundra become more vulnerable due to climate change impacts.
Article Synopsis
- Predation plays a crucial role in ecosystems, impacting food webs, energy flow, and nutrient cycling, though most research has focused on larger predators rather than microscopic ones like bacteria.
- This study found that obligate predatory bacteria exhibited significantly higher growth and carbon uptake (36% and 211% more, respectively) compared to nonpredatory bacteria across various environments, while facultative predators showed only slightly enhanced rates.
- The research indicates that increased energy flow in microbial communities boosts the role of predatory bacteria, suggesting that more productive environments lead to stronger predatory influence on lower trophic levels.
This study explores the relationships of AM fungal abundance and diversity with biotic (host plant, ungulate grazing) and abiotic (soil properties, precipitation) factors in the Serengeti National Park, Tanzania. Soil and root samples were collected from grazed and ungrazed plots at seven sites across steep soil fertility and precipitation gradients. AM fungal abundance in the soil was estimated from the density of spores and the concentration of a fatty acid biomarker.
View Article and Find Full Text PDF