BIO 121 Lecture Notes - Lecture 30: Dete, Effect Size, Evolutionary Medicine
10 Dec 2020
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#1 infectious disease: lower respiratory infections, then hiv, then diarrhea, then tuberculosis; the malaria branches: zebra: disruptive patterning. Camouflage: blending organisms to background; stick insects mimic twigs and. Mullerian mimicry: unpalatable species converge to look same; reinforce danger. Batesian mimicry: mimicry of unpalatable species by palatables. Types of +/- interactions signal; mimicry ring: sympatric species. Similar to predation- factor affecting population persistence, community composition. 18% of terrestrial plant biomass more than 50% in aquatic system. Study herbivores and plants in the field; removal experiments; 93 published, average of 7% of leaf area eaten; temperate forest system=5-15% defoliation by insects ex. Effect size of herbivores; greatest on algae; smallest on woody plants. Can also gauge strength of herbivory by examining evolved response of plants. 2nd chemicals: defense compounds; not part of primary pathway that plants use for energy. Thorns and spines dete herbivores; plants close to ground, tasty. Evergreens in a deciduous forest: severe herbivore pressure in the winter.
