BIOL-2356EL Lecture Notes - Lecture 8: Hawfinch, Symbiosis, Herbivore
4 Mar 2020
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Need energy as organic molecules (they cannot photosynthesize or chemosynthesize) They cannot synthesize certain organic molecules i. e. essential amino acids, essential fatty. Fisher teeth are made to slice meat, while otter teeth are made to crush fish and crayfish (adaptation for specific foods) Hummingbird beaks are made to access nectar, hawfinch beaks are made to crush cherry pits, vulture beaks are made to pick at decaying flesh, and flamingo beaks are made to capture algae. Dry matter powdery mildew is biotrophic (needs live plants to survive) Primary consumers (herbivores) feed on plants - fungi can also be primary producers, Plants: carbohydrates (cellulose, starch) and lignin dominate. Carbon:nitrogen (c:n) ratio : plants = 40 animals = 15. Higher protein content in animals = higher nitrogen concentration. Digestion of plant material is more complex than animal material. Mammals require more n, p, s, ca, na and cl than nutrition based solely on plants can.
