Chapter 1 Trillium

Trillium genus are long-lived, woodland, perennial wildflower found throughout eastern North America. In this example, I have temperature, precipitation and basic land cover data. I will use that to try to model Trillium distribution.

Trillium grandiflorum occurs on well-drained, rich, mesic soils in deciduous or mixed deciduous/coniferous forests. Trillium undulatum occurs in mesic, northern hardwoods, mixed conifer-hardwood forests, to pinewoods and high-elevation red spruce forests in very acidic humus-rich soils.

Red Trillium

Painted Trillium

Hubbard Brook is an experimental forest in New Hampshire. It is in a watershed surrounded by a ridge with Hubbard Brook flowing west to east. There are few Trillium observations in the GBIF database in the experimental forest though Trillium occurs there.