The Greenwood Lab Group Photo

I am trained in the field of ruminant nutritional physiology, and my experience working on dairy farms fuels my passion to perform research that supports the dairy industry. After completing my BSc in Animal Biology (University of Guelph, Canada), I completed my MSc in Animal Science at the University of Alberta (Canada) focused on the impact of stress on intake signaling in calves. I then returned to the University of Guelph to complete a PhD, using molecular techniques to investigate shifts in protein metabolism caused by nutritionally induced acidosis in ruminants. I moved to New Zealand to become an Assistant Professor at Lincoln University, where my research was focused on nutritional strategies that could reduce urinary nitrogen excretion from dairy cattle, which was an environmental concern. I began to investigate the impacts of these nitrogen shifts on milk protein profiles, and have continued some of this research in my role as Associate Professor in Animal Nutrition at the University of Vermont.

I am currently looking for a new MS student, See posting:

PDF icon Master of Science (M.S.) Position in Animal Science (PDF)

 

Research

I have an active research laboratory centered on the field of dairy cattle nutritional physiology. My past experience in both TMR-based systems in North America and pasture-based systems in New Zealand have fueled my motivation to maintain research in both classic intensive and more extensive-type dairy systems. Over the past 5 years my research has developed into 3 facets:

1. Characterization and dietary manipulation of the bovine milk proteome.

To date, very little characterization of the comprehensive bovine milk protein profile has been made. We have the capacity to complete identification of the major casein and whey isoforms in our lab, and I have developed a collaboration with the University of Vermont Proteomics Facility to complete Mass-Spectrometry analysis of an extensive list of minor proteins (over 900). We have successfully characterized breed differences in the bovine milk proteome, and have current research projects aimed at investigating the impact of diet on this proteome and examination of the sources of the diverse low-abundance milk protein profile.

Heat Map

2. Exploration and assessment of nutritional strategies used in grazing systems.

This research stems from my previous research while on faculty at Lincoln University in New Zealand. In a current collaborative program, I am working with both research and extension faculty to assess the nutritional strategies used on organic dairy farms across the state during the grazing season, and develop recommendations and guidelines to help producers fine-tune these individual strategies. This facet of research is applied, and an important focus for our regional producers, particularly those that are organic and rely on these nutritional strategies for the financial and productive success of their herds. This research is collaborative and multi-dimensional, including research at the soil-, plant-, animal-, and economic- level.

Cows grazing and Students collecting data

3. Investigation of rumen dynamics using in vitro continuous culture fermenters.

Ultimately, the impact of nutrition on a ruminant animal is heavily dependent on the rumen environment and nutrient use efficiencies. My personal interests in this research facet include the impact of these supplements on the rumen environment, including rumen acidosis and nutrient use efficiencies, both of which stem from my graduate-level work, where my main focus was ruminant acidosis and amino acid cycling.

Lab Fermenter in Terrill Building

Faculty Headshot

Join The Greenwood Lab

Interested in being a graduate student in the Greenwood lab?

If you find your research interests align with our research goals, send Dr. Greenwood an e-mail including:

  1. A statement of your interests (including why you feel my lab is a good fit for you)
  2. Your curriculum vitae (CV) or resume
  3. Any pertinent scores such as your GPA, GRE and TOEFFL scores

Instructions outlining how to apply to the University of Vermont graduate program are on the UVM Graduate College website: UVM Graduate College or visit Application Instrictions

Education

  • Ph.D., University of Guelph, Canada
  • MSc., University of Alberta, Canada
  • BSc., University of Guelph, Canada

Professional Positions

  • Assistant Professor, University of Vermont (2012-Present)
  • Lecturer (Assistant Professor), Lincoln University (2009-2012)
  • Sessional Instructor, University of Guelph (2009)
  • Teaching Assistant, University of Guelph & University of Alberta (Occ. 2004-2008)
  • Project Coordinator, University of Alberta (Fall 2005)

Professional Memberships

  • International Advisory Committee Member for the International Symposium on the Nutrition of Herbivores (2011-Present)
  • American Dairy Science Association

Work Address

303 Terrill, 570 Main Street, Burlington, VT  05405
Office:  (802) 656-0145
Lab: (802) 656-0893
Fax: (802) 656-8196
Sabrina.Greenwood@uvm.edu