Tyler SaduttoMELNHE Shoestring Crew

Franklin University Switzerland ‘16

Does CaSiO3 Enhance Soil Respiration, Fine Root

Production, or Microbial Activity?

Introduction – Soil Respiration

Measure of CO2 emitted from soil surface Heterotrophic and

AutotrophicThought to decrease

with increased nutrient availability Studied with N and P

additionsEffects of CaSiO3 are

unknown

Objectives

To understand how CaSiO3 affects soil respiration by measuring Total soil respiration Fine root production Microbial respiration

Methods

Calcium and Control plots – C1, C6, C8 at BEFTotal Soil Respiration:

LI-COR 8100 and soil respiration collars Measured every two weeks

Fine Root Production: Root screens Weigh biomass after three weeks

Microbial Respiration: One soil sample from each plot Base Trap Method

Expected Results

Decrease in fine root productionDecrease in microbial respiration

Overall decrease in total soil respiration

References

Fahey TJ et al. 2005. Soil Respiration and Soil Carbon Balance in a Northern Hardwood Forest Ecosystem. Canadian Journal of Forest Research 35: 244-253.

Hamburg S et al. 2003. Biotic Control of Calcium Cycling in Northern Hardwood Forests: Acid Rain and Aging Forests. Ecosystems 6: 399-406.

Hanson et al. 2000. Separating Root and Soil Microbial Contributions to Soil Respiration: a Review of Methods and Observations. Biogeochemistry 48: 115-146.

McLaughlin M, Wimmer R. 1999. Tansley Review No. 104: Calcium Physiology and Terrestrial Ecosystem Processes. New Phytology 142: 373-417.

Peng Y, Thomas S. 2010. Influence of Non-Nitrogenous Soil Amendments On Soil CO2 Efflux and Fine Root Production in an N-Saturated Northern Hardwood Forest. Ecosystems 13: 1145-1156.

Raich J, Potter C. 1995. Global Patterns of Carbon Dioxide Emissions from Soils. Global Biogeochemical Cycles 9(1): 23-36.

Rastetter EB et al. 2013. Recovery from Disturbance that Requires Resynchronization of Ecosystem Nutrient Cycles. Ecological Applications 23(3): 621-642.

Savage K et al. 2013. Long-term Changes in Forest Carbon Under Temperature and Nitrogen Amendments in a Temperate Northern Hardwood Forest. Global Change Biology 19: 2389-2400.

Schlesinger W. 1977. Carbon balance in Terrestrial Detritus. Annual Review of Ecology and Systematics: 51-81.

Yanai R et al. 2005. New Insights into Calcium Depletion in Northeastern Forests. Journal of Forestry: 14-20. Zak D et al. 2006. Microbial Cycling of C and N in Northern Hardwood Forests Receiving Chronic NO3

- Deposition. Ecosystems 9: 242-253.

Zhou W et al. 2014. Effects of Soil Moisture on the Temperature Sensitivity of Soil Heterotrophic Respiration: A Laboratory Incubation Study. PLOS ONE 9(3): 1-10.

Acknowledgments

I would like to thank the following people for their support and guidance:

Jerome BarnerTim Fahey

Melany FiskMariann Johnston

Matt VadeboncoeurRuth Yanai

Shoestring Crew ‘15:Brigid Farrell, Austin Frewert, Matt Hayden, Nick Hodom, Caitlin

Holmes, Aaliyah Jason, Isaac Jo, Jalina Pannafino, Jessie Smith, Jessica Swindon