CHAPTER 8_ AQUATIC BIODIVERSITY - Rodwong 1 Ivy Rodwong Mr.Buenaventura AP Environmental Science October 1 2018 Chapter 8 Aquatic Biodiversity 1

CHAPTER 8_ AQUATIC BIODIVERSITY - Rodwong 1 Ivy Rodwong...

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Rodwong 1 Ivy Rodwong Mr.Buenaventura AP Environmental Science October 1, 2018 Chapter 8: Aquatic Biodiversity 1. What Is the General Nature of Aquatic Systems? a. Most of the Earth Is Covered with Water i. Global ocean 1. Atlantic 2. Pacific 3. Artic 4. Indian Oceans ii. Aquatic Life Zones iii. Saltwater life Zones 1. particularly estuaries, coastlines, coral reefs, coastal marshes, mangroves swamps, and oceans iv. Freshwater Life Zones 1. particularly lakes and ponds, streams and rivers, and inland wetlands b. Aquatic Species Drift, Swim, Crawl, and Cling i. Plankton 1. weakly swimming, free floating ii. Phytoplankton iii. Ultraplankton iv. Zooplankton v. Nekton 1. strongly swimming consumers vi. Benthos 1. barnacles and oysters anchor themselves to one spot vii. Decomposers 1. mostly bacteria that break down the organic compounds in dead bodies and wastes of aquatic organisms viii. Key Factors determining the types and numbers of organisms found in different areas of the ocean 1. Temperature 2. Dissolved oxygen content 3. Availability of food 4. Availability of light and nutrients required for photosynthesis 5. turbidity
Rodwong 2 2. Why Are Marine Aquatic Systems Important? a. Oceans Provide Vital Ecosystem and Economic Services i. Coastal zone 1. is the warm, nutrient rich shallow water that extends from the high tide mark on land to the gently sloping narrow edge of the continental shelf(the submerged part of the continent) high productivity because of sunlight and plant nutrients b. Estuaries And Coastal Wetlands Are Highly Productive i. Estuary 1. Ecotone of partially enclosed coastal water with mixing of fresh and saltwater daily, (variation in temps and salinity b/c of tides, low tide-low salinity, vice versa) ii. Coastal wetlands 1. land areas covered with water all or part of the year including river mouths, inlets, bays, mangrove forest swamps in tropical waters and salt marshes in temperate zones iii. Coastal marshes 1.

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