BISC 102 Lecture Notes - Lecture 19: Aphotic Zone, Neritic Zone, Photic Zone
3 Mar 2017
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High intertidal: mostly aerial environment; limpets (relatives of snails), barnacles (arthropods, relative to shrimps) Why are mussels only in the mid-intertidal? (robert pain) No, when growing, only drifting meaning they are not fixed in one zone as they grow they fix themselves on the mid-zone. Yes, when predators were removed, mussel distribution extended into lower intertidal. Yes, kept the mussels wet, extended to the high intertidal zone. Ecology = study of interactions between organisms and their environment. Aquatic environments 3 key abiotic factors for distribution and abundance of organisms. Nutrient availability, water depth, water movement: water depth affect light penetration green penetrates the deepest because they are not absorbed by photosynthetic organisms. Biomes = large areas of land defined by the inhabiting organisms (plant, animal communities). The environment: abiotic environment (cid:862)(cid:374)o(cid:374)-livi(cid:374)g(cid:863); ph(cid:455)sical a(cid:374)d che(cid:373)ical features (cid:894)e(cid:454)/ te(cid:373)perature, moisture, light, chemistry, biotic environment (cid:862)livi(cid:374)g(cid:863); predator-prey interaction, competition, etc.
