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What do these abiotic factors have in common
What do these abiotic factors have in common? What is different about them?
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Three out of the four sources of water (lake, river, ocean) include both biotic and abiotic factors; therefore, they are considered communities or ecosystems. The glacier is just an abiotic factor because it does not contain any biotic organisms (at least that we know about).
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Over the next few days, we will learn about the characteristics of aquatic (water) communities that contain both biotic and abiotic factors.
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Essential Question: What are the characteristics of the Earth’s major aquatic communities?
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Standard: S7L4e. Describe the characteristics of Earth’s major terrestrial biomes and aquatic communities (i.e. freshwater, estuaries, and marine)
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What does aquatic mean? Aquatic means water.
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Nearly 70% of the Earth’s surface is covered by water
Nearly 70% of the Earth’s surface is covered by water. The biotic and abiotic factors in these ecosystems make up aquatic communities.
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Aquatic communities are influenced by:
Amount of light present Amount of oxygen present Amount of nutrients available Salinity (salt) level of the water
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There are three types of Aquatic communities we will discuss:
Marine Freshwater Wetland
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Marine
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Use your Marine Chart to take notes
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Marine Marine ecosystems exist in salt water
There are four general marine zones: intertidal, neritic, oceanic, and benthic
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Marine – Intertidal Zone
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Marine – Intertidal Zone Characteristics
Area of shore between low and high tide Organisms must be able to survive the changing tides and the pounding waves Sometimes under water, sometimes exposed to air and sunlight Most biologically active due to high level of light and nutrients
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Marine – Intertidal Zone Biotic Life
Crab Clam Oyster They burrow in the sand or retreat to shells during low tides
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Marine – Intertidal Zone Biotic Life
Snail Sea Star Sea Urchin They cling to rocks and other surfaces
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Marine – Neritic Zone
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Marine – Neritic Zone Characteristics
Located above the continental shelf Water is shallow enough that light can penetrate it, which makes photosynthesis possible
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Marine – Neritic Zone Biotic Life
Collection of small or microscopic organisms, including algae and protozoans, that float in great numbers in fresh or salt water, especially at or near the surface, and serve as food for fish and other larger organisms Plankton
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Marine – Neritic Zone Biotic Life
Sea Turtle Dolphins Squid
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Marine – Oceanic Zone
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Marine – Oceanic Zone Characteristics
Open ocean and the largest marine zone Makes up most of the world’s oceans Sunlight can only pass through about 200 meters Most of the photosynthesis occurs in this zone because of the huge area Where sunlight does not reach, it becomes dark and cold with increased pressure
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Marine Oceanic Zone: Biotic Life
Sword Fish Fishes, mammals, and animals without backbones live here. Some fish have no eyes or have developed luminescent organs Whale Tuna
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Marine – Benthic Zone
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Marine – Benthic Zone Characteristics
Ocean floor Extends horizontally from the Neritic zone through the Oceanic zone Hydrothermal vents found in deep areas Coral reefs are commonly found in the warm, shallow waters of benthic areas
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Marine – Benthic Zone Biotic Life
Hagfish Clam Tubeworm
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Zones of the Marine
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Turn to an elbow partner and compare the four zones of the marine biome.
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Label your diagram
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Only 3% of all the water on the Earth’s surface is fresh water
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Fresh Water Characteristics
Low salt content (salinity) Found in most places Found in areas with differing temperatures Supports a variety of animal and plant life Important in recycling the Earth’s water supply through the water cycle
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Fresh Water Lake Pond
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Fresh Water – Lakes & Ponds Characteristics
Bodies of fresh water that flow slowly or not at all Lakes are deeper and larger than ponds Ponds are shallow enough to allow sunlight to reach the bottom; therefore, plants can grow
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Fresh Water – Lakes & Ponds Biotic Life
Algae Bass Frog Catfish Turtle
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Fresh Water River Stream Creek
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Fresh Water – Rivers & Streams Characteristics
Water that flows Rivers begin as cold streams in the mountains or hills that flow rapidly Farther down the mountain, water slows down and forms twists and turns Small streams join together to form large rivers Plants and animals must be able to survive the flowing currents
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Fresh Water – Rivers & Streams Biotic Life
Trout and other fish have sleek bodies that help them move with the current; others have “suckers” they use to latch on to rocks Where the water slows down you can find beavers and otters
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Turn to an elbow partner and compare and contrast lake/pond and river/stream. Include characteristics and adaptations.
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Wetlands
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Wetlands An ecosystem where water either covers the soil or is near the soil’s surface for all or part of the year Includes marshes, swamps, and estuaries May be fresh water or salt water Water may flow or stand still Important because it provides breeding grounds for organisms Plant life adapted to live in water
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Wetland - Estuary
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Wetland - Estuary
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Wetland – Estuary Characteristics
Wetland which forms at the mouth of a river where fresh water mixes with salt water from an ocean or bay Great diversity of plants and animals Dense (thick) plants protect organisms from waves and hide them from predators Tides circulate nutrients
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Wetlands – Estuary Biotic Life
Shrimp Mullet Examples of organisms that begin their lives in an estuary.
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Wetlands – Estuary Biotic Life
Osprey Heron Scallop
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Wetlands – Marshes & Swamps
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Wetlands – Marshes & Swamps Characteristics
Areas where water is more or less permanently at the surface Abundance of plant and animal life because nutrients are plentiful Marsh consists of soft stemmed vegetation Swamp is mainly woody plants or shrubs
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Wetlands – Marsh Biotic Life
Blackbird Butterfly Otter Duck Blue Heron Turtle
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Wetlands – Swamp Biotic Life
Crocodile Bald Eagle Frog Egret Dragonfly Shrimp
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Label your diagram Ocean Stream Lake River Estuary
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Study Jams: Aquatic Ecosystems
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