SIO 132 Lecture 7: SIO 132 10.19.17 Lect. 7 Major Subtidal Benthic Habitats
22 Feb 2018
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Outline--> meso/bathypelagic zones, deep sea bottom, hydrothermal vents, kelp forests, coral reefs. Large temperature drop, goes to being really cold and really dark, photosynthesis stops at the top and visual predation stops at the base it"s all di(cid:373)l(cid:455) lit: has a diverse community of bact. , protists, zooplank. , and nekton. Chemosynthetic mutualism: there"s a worm (slide 29) that has high hemoglobin as well as sulfur binding proteins, they have a large trophosome sack inside their body that has mutualistic bacteria inside that creates sugars for the organism. The gills are very effective at getting o 2, co 2, h2s into blood. In general biotic factors can control kelp distributions: model predicts enough light and nutrients in many areas throughout the tropics. Coral reefs: hard corals- phylum cnidaria, the class hexacoralia (have hexa-radial symmetry, six parts), the order of scleractinia (hard shells, related to jellies and anemones (other hexacorals, other type, cl.
