The UC Davis Graduate Group in Ecology (GGE) is the largest and most comprehensive ecology graduate training group of its kind. Offering unparalleled diversity and depth in course work and research opportunities, the group is recognized as a center for academic and training excellence. Offering both Master’s and Ph.D. degrees, the Graduate Group is organized into nine areas of emphasis that include both basic and applied ecology.ehe UC Davis Graduate Group in Ecology (GGE) is the largest and most comprehensive ecology graduate training group of its kind. Offering unparalleled diversity and depth in course work and research opportunities, the group is recognized as a center for academic and training excellence. Offering both Master’s and Ph.D. degrees, the Graduate Group is organized into nine areas of emphasis that include both basic and applied ecology.