TAMU OCNG 251 - Exam 4 Study Guide (6 pages)

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Exam 4 Study Guide

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Exam 4 Study Guide


Study guide covers concepts in the review and lectures for Exam four

Study Guide
Texas A&M University
Ocng 251 - Oceanography
Oceanography Documents

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OCNG 251 Exam 4 Study Guide Ch 13 Biological Productivity I Photosynthesis and respiration Photosynthesis Respiration produces food consumes food stores energy releases energy consumes H2O produces H2O consumes CO2 produces CO2 releases O2 consumes O2 light dependent light independent In Photosynthesis plant cells capture light energy and store it as sugars The photosynthetic reaction is reversible respiration II Diatoms coccolithophores and dinoflagellates primary producers with distinctive character A Diatoms Micro tiny algae Length 50 m When they divide asexually the test splits into two parts like a pillbox Each half becomes a new diatom Tests are made of silica SiO2 glass most productive group of marine algae B Coccolithophores covered with small calcareous plates called cocoliths made out of calcium carbonate live in temperate and warmer surface waters C Dinoflagellates possess flagella structures for locomotion tests made out of cellulose which is biodegradable are in favorable areas for photosynthetic productivity great abundance they color surface waters red III Harmful algal blooms red tides Red tides and algal blooms that do not color the water red but are detrimental to marine animals humans and the environment toxic blooms can kill marine life and people who eat contaminated seafood IV Primary production polar mid latitude and equatorial differences in production A Polar Regions Productivity peaks during the summer and is limited by sunlight B Mid latitude Productivity peaks in the spring and fall and is limited by a lack of solar radiation in the winter and lack of nutrients in the summer C Tropical Regions Productivity is low year around and is limited by nutrients V Factors affecting distribution of productivity in the oceans light nutrients A Light Photosynthesis cannot proceed unless light energy is available B Nutrients the distribution of life through the ocean s bredth and depth depend mainly in the distribution of nutients such as nitrogen

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