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1. Primary productivity is the rate at which an ecosystem's producers (usually plants) convert solar energy into chemical energy in the form of biomass found in their tissues. Net primary productivity is the rate at which pro- ducers use photosynthesis to produce and store chemical energy minus the rate at which they use some of this stored chemical energy through aerobic respiration. What is left as biomass in the plants is energy available to the next trophic level. (a) Using the graph below, answer the following questions: (i) Calculate the percent difference in net productivity between a temperate forest ecosystem and a temperate grassland ecosystem. (ii) Identify TWO abiotic factors that influence the productivity of ecosystems. Explain how these two factors influence the productivity of both temperate grassland and temperate forest ecosystems. Terrestrial Ecosystems Swamps and marshes Tropical rain forest Temperate forest Northern coniferous forest (taiga) Savanna Agricultural land Woodland and shrubland Temperate grassland Tundra (arctic and alpine) Desert scrub Extreme desert Aquatic Ecosystems Estuaries Lakes and streams Continental shelf Оpen ocean 800 1,600 2,400 3,200 4,000 4,800 5,600 6,400 7,200 8,000 8,800 9,600 Average net primary productivity (kcal/m²/yr)

1. Primary productivity is the rate at which an ecosystem's producers (usually plants) convert solar energy into chemical energy in the form of biomass found in their tissues. Net primary productivity is the rate at which pro- ducers use photosynthesis to produce and store chemical energy minus the rate at which they use some of this stored chemical energy through aerobic respiration. What is left as biomass in the plants is energy available to the next trophic level. (a) Using the graph below, answer the following questions: (i) Calculate the percent difference in net productivity between a temperate forest ecosystem and a temperate grassland ecosystem. (ii) Identify TWO abiotic factors that influence the productivity of ecosystems. Explain how these two factors influence the productivity of both temperate grassland and temperate forest ecosystems. Terrestrial Ecosystems Swamps and marshes Tropical rain forest Temperate forest Northern coniferous forest (taiga) Savanna Agricultural land Woodland and shrubland Temperate grassland Tundra (arctic and alpine) Desert scrub Extreme desert Aquatic Ecosystems Estuaries Lakes and streams Continental shelf Оpen ocean 800 1,600 2,400 3,200 4,000 4,800 5,600 6,400 7,200 8,000 8,800 9,600 Average net primary productivity (kcal/m²/yr)

Applications and Investigations in Earth Science (9th Edition)
Applications and Investigations in Earth Science (9th Edition)
9th Edition
ISBN:9780134746241
Author:Edward J. Tarbuck, Frederick K. Lutgens, Dennis G. Tasa
Publisher:Edward J. Tarbuck, Frederick K. Lutgens, Dennis G. Tasa
Chapter1: The Study Of Minerals
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1. Primary productivity is the rate at which an ecosystem's producers (usually plants) convert solar energy into chemical energy in the form of biomass found in their tissues. Net primary productivity is the rate at which pro- ducers use photosynthesis to produce and store chemical energy minus the rate at which they use some of this stored chemical energy through aerobic respiration. What is left as biomass in the plants is energy available to the next trophic level. (a) Using the graph below, answer the following questions: (i) Calculate the percent difference in net productivity between a temperate forest ecosystem and a temperate grassland ecosystem. (ii) Identify TWO abiotic factors that influence the productivity of ecosystems. Explain how these two factors influence the productivity of both temperate grassland and temperate forest ecosystems. Terrestrial Ecosystems Swamps and marshes Tropical rain forest Temperate forest Northern coniferous forest (taiga) Savanna Agricultural land Woodland and shrubland Temperate grassland Tundra (arctic and alpine) Desert scrub Extreme desert Aquatic Ecosystems Estuaries Lakes and streams Continental shelf Open ocean 6,400 7,200 8,000 8,800 9,600 800 1,600 2,400 3,200 4,000 4,800 5,600 Average net primary productivity (kcal/m?/yr)
Transcribed Image Text:1. Primary productivity is the rate at which an ecosystem's producers (usually plants) convert solar energy into chemical energy in the form of biomass found in their tissues. Net primary productivity is the rate at which pro- ducers use photosynthesis to produce and store chemical energy minus the rate at which they use some of this stored chemical energy through aerobic respiration. What is left as biomass in the plants is energy available to the next trophic level. (a) Using the graph below, answer the following questions: (i) Calculate the percent difference in net productivity between a temperate forest ecosystem and a temperate grassland ecosystem. (ii) Identify TWO abiotic factors that influence the productivity of ecosystems. Explain how these two factors influence the productivity of both temperate grassland and temperate forest ecosystems. Terrestrial Ecosystems Swamps and marshes Tropical rain forest Temperate forest Northern coniferous forest (taiga) Savanna Agricultural land Woodland and shrubland Temperate grassland Tundra (arctic and alpine) Desert scrub Extreme desert Aquatic Ecosystems Estuaries Lakes and streams Continental shelf Open ocean 6,400 7,200 8,000 8,800 9,600 800 1,600 2,400 3,200 4,000 4,800 5,600 Average net primary productivity (kcal/m?/yr)
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