Primary Productivity and Marine Ecosystems: Terms and Concepts, Quizzes of Oceanography

Download Primary Productivity and Marine Ecosystems: Terms and Concepts and more Quizzes Oceanography in PDF only on Docsity! TERM 1 Primary Productivity DEFINITION 1 the rate at whichenergy(carbon) is stored in organic matter TERM 2 Photosynthesis DEFINITION 2 solar radiation production of carbs fromCO2 & waterin the presence of chlorophyll using light energy and releasing oxygen (chemical energy) TERM 3 Chemosynthesis DEFINITION 3 chemical reactions bacteria-like organisms trap chemical energy by oxidation TERM 4 Factors That Affect Productivity DEFINITION 4 nutrient availability (river runoff & upwelling) solar radiation: compensation depth (net photosynthesis becomes zero) euphotic zone (surface to ~ 100 m) TERM 5 Variability of Primary Productivity DEFINITION 5 Polar Regions: productivity peaks during the summer & is limited by sunlight Tropical Regions: productivity is low year-round and is limited by nutrients Temperate Regions: productivity peaks in spring/fall, limited by lack of solar radiation in winter/lack of nutrients in summer TERM 6 Producers DEFINITION 6 autotrophic can nourish themselves through photosynthesis or chemosynthesis examples: algae, plants, archaea, photosynthetic bacteria TERM 7 Consumers DEFINITION 7 heterotrophic eat other organisms can be herbivores, carnivores, omnivores, bacteriovores TERM 8 Decomposers DEFINITION 8 break down dead organisms or waste TERM 9 Iron Hypothesis DEFINITION 9 to increase productivity they could add iron, the only nutrient the ocean lacks adding iron increases the amount of CO2 removed from the atmosphere TERM 10 Upwelling DEFINITION 10 greatly enhances conditions for life by lifting cold, nutrient-rich water to the sunlit surface areas of coastal upwelling are sites of high productivity