BISC 204 Lecture Notes - Lecture 2: Littoral Zone, Oceanic Zone, Neritic Zone

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Bisc 204 lecture 2: variations in the physical environment and biomes. Foundation for understanding broad scale differences among ecosystems. Also serves as the template upon which species adaptation, population dynamics, species interactions, and ecosystem function operates. Earth rotates on its axis once every 24 hrs. producing regular day and night cycles. Circadian rhythms, individual behaviour (diurnal, nocturnal, crepuscular) Circadian rhythms refer to the 24-hour cycle in the physiological processes in human beings. Crepuscular = active during twilight (period immediately after. The moon revolves around the earth once every ~28 days producing tidal dawn and before dusk) variation. Intertidal zonation, individual behaviour (movement, feeding, spawning, etc. ) Intertidal zonation is the area between low and high tide. The earth revolves around the sun once every 365 days, combined with the its tilted axis (23. 5 ), produces seasonal variation in solar intensity. Annual allocation of activity and energy (hibernation, leaf-fall, migration) Electromagnetic radiation from the sun serves many purposes .

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