BIO205H5 Lecture Notes - Lecture 14: Natural Experiment, Guppy, Haida Gwaii
Document Summary
Methods section for assignment: you should know what kind of statistics you would be doing before looking at the data. You can describe the stats in the results section. You can omit the stats in your methods b/c not a lot of experience. You can describe statistical methods but don"t worry about getting it right or wrong. Lecture 14: how predators and prey influence each other. This also applies to herbivores (impact on plant communities: high predator -> decreases prey population. Same interactions for herbivores towards plants e. g. deer exclosure on haida gwaii. No deer: large plants, large trees, green leaves. Deer has access: nearly barren, small plants. Islands differ in size of black-tailed deer populations. Few hundred years ago, population was controlled by cougars, wolves, and by first nations. Plants that deer don"t like to eat are still intact. Bird abundance (individuals/ha) on islands with few or many deer. Table showing reciprocal relationship between understorey birds and deer abundance.
