Biology 2483A Lecture Notes - Lecture 15: Coevolution, Protist, Arbuscular Mycorrhiza
9 Nov 2017
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Symbiosis: two species live in close physical contact with each other: examples: pea aphids and their bacterial symbionts; humans and bacteria. Positive interactions: those in which one or both species benefit and neither is harmed. Lighthouse reef atoll positive interactions have influenced key events in the history of life and continue to shape communities and influence ecosystem functions. Dark spot = where there"s a drop off in seafloor elevation. Warm oligotrophic environment like a desert. Think of a reef like a desert with animals running through it e. g. zebra, gazelle, giraffe, cheetah: ie. Reefs are comparable to rainforests species diversity is very high. Diversity due to corals = colorful, which indicates mutualistic relationship with symbiotic micro-algae. Symbiotic micro-algae (symbiodinium) often referred to as zooxanthellae. Colonization of algae (all hard corals have zooxanthellae) When you think of a coral reef, think about it like a desert with solar panels. Looking at this soft tissue that resigns on the calcium carbonate (exoskeleton)
