BIO220H1 Lecture Notes - Lecture 11: Cherry Blossom, Phenology, Koch Family
BIO220H1 verified notes
11/26View all
Document Summary
*many organisms use temperature to regulate their life cycles, such as the reproduction time. We can use data on timing of organisms to track whether or not things are getting warmer. Study of cycles, seasonal influences, timing events. Combine the effects of temperature and the influence on animals and plants. Canadian lakes are thawing earlier than before. Budburst are arriving earlier than before between data from 1984-1999. Recorded the flowering time of all the flower species they see. Compared flowering date deviation of 2000 and 1990s, are flowering earlier. At the bottom of a food web, no effect on budburst in oak trees. Next trophic level: caterpillar abundance seems to show earlier hatching. Hatching date of birds are getting earlier. *bottom and top of the food web are not showing phenology changes. * inconsistency, response to climate change is highly unequal across species. (maybe the sparrow hawks are driven by other organisms that may have an impact on their phenology).
