BIO220H1 Lecture Notes - Lecture 11: Trophic Cascade, Phenology, Eaves
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BIO220H1 Full Course Notes
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Document Summary
Phenology study of cyclic and seasonal natural phenomena (timing events) Integrate the effects of temperature into their effects on organisms: three examples: Date of first flower in british wildflowers. Most canadian lakes thaw earlier than they used to. Bud burst in european birch and oaks: budburst emergence of new eaves or stems at the start of the growing season, budding coming earlier between 1984-1999. British plants flower earlier: vast majorities of species are flowering earlier than they did in the 1950s spring is coming earlier, this is a general phenomenon. Cause of warming: greenhouse effects or increased activity: troposphere lowest layer, stratosphere second layer. Independent verification: conclusions from skeptics: rebuilt global climate histories, database, etc, from scratch starting from the raw data (ipcc, all raw data posted online and computer code for analysis also posted, sought to address criticisms of. Data selection, data adjustment due to different gauges, protocols.
