BIO120H1 Lecture : Lecture 23.docx
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BIO120H1 Full Course Notes
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Document Summary
Ecological & evolutionary consequences of global climate change: Art weiss showed that evolutionary changed occurred as a resut of droughts on certain plant. He showed that flwering time occurs earlier thus making more seed. Plants that don"t flower early just dry up when the drought hits and they cant release seeds. Selection is one thing but did genetic response occur. He took seeds through this period, generation to generation. In 1997 seeds where compared to seeds in 2004 . what he saw was that the 2004 plants flowered 8. 5 days earlier than the 1997 flowers. Biodiversity the # and kinds of living organisms in a certain area. Most of it occurs in country unable to look after it. Species diversity, ecological diversity, genetic diversity, phylogenetic diversity. The loss of biodiversity is irreversible and unpredicatable. How does biodiversity resist perturbation in the environment. 99% of species that ver lived are now extinct.
