BIO120H1 Lecture Notes - Lecture 3: Glyptodon, Hms Beagle, Marsupial
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BIO120H1 Full Course Notes
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Document Summary
Bio120 lec 3 what darwin saw: a geographical perspective of adaptation and biodiversity. Observed fossils, geographical distribution of species (plants and animals) High species diversity of plant and animal groups compared to temperate zone (u. k. ), and many novel adaptations. Many more biotic interactions (eg. coevolved mutualisms between plants and animals - both interacting partners benefit from interactions (unlike parasitism where one benefits at the expense of the other)) Year-round warmth resulted in rapid growth of insect and microbial populations (unlike in colder climates with winter). Pest and disease pressures on plants = more intense compared to temperate zone. Tropical forests have high species diversity and individuals of same species are widely separated - unlike temperate forests. Tropical forests = largely evergreen / non-deciduous unlike temperate forests. Dense canopies and long distance between trees makes wind a poor agent of pollen dispersal (animals = better pollinators - eg birds, butterflies, bats, bees) Euglossine bees as long-distance pollinators of tropical plants.
