34.4 aquatic ecosystems
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34.4 Aquatic Ecosystems. Objectives. Compare and contrast ponds, streams, and estuaries. Compare conditions and typical organisms in the intertidal, neritic, and oceanic zones. Describe the abiotic and biotic factors that characterize coral reefs and hydrothermal vent communities. Vocabulary. - PowerPoint PPT PresentationTRANSCRIPT
34.4
34.4Aquatic Ecosystems
ObjectivesCompare and contrast ponds, streams, and estuaries.Compare conditions and typical organisms in the intertidal, neritic, and oceanic zones.Describe the abiotic and biotic factors that characterize coral reefs and hydrothermal vent communities.Vocabularyphotic zonephytoplanktonaphotic zonebenthic zoneestuarypelagic zoneintertidal zoneneritic zoneoceanic zonezooplanktonhydrothermal ventPonds and Lakesfreshwaterstanding, not flowingdivided into zones based on water depth and distance from shore
Photic Zoneshallow, close to shoreupper area further from shoresunlightphotosynthesisphytoplanktonalgaecyanobacteriawater plants
Prokaryotic, photosynthetic bacteriaeukaryotic, photosyntheticvague definitions
Aphotic Zonedeep, murky areasnot enough light for photosynthesis
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Benthic Zonebottom of any aquatic ecosystemrock, sand, sedimentorganisms feed on waste from photic zonesoft, squishiness between your toes
Streams and Riversfreshwaterflowingstream smaller than rivernear source: cold, clear, small, emptydownstream: wider, deeper, wetlands nearby, warmer, murky, more organisms
Estuariesstreams/rivers merge with oceanchange in salt concentration and temperaturenutrient-rich soilone of most productive ecosystemsbreeding, nestingcrabs, oysters, mangroves
Ocean Zonesdepth: benthic (floor), pelagic (open water above floor)photic and aphoticdistance from shore:intertidalneriticoceanic
Intertidal Zonebetween high tide an low tide linespounded by wavesexposed to sun and windspecial adaptations of organismsbarnacles
videoNeritic Zonefrom low-tide line out to edge of continental shelffairly shallowsome sunlightseaweedphytoplanktoncoral reefsmollusks, sponges, sea turtles, seals
Oceanic Zoneopen ocean from continental shelf outwardphytoplanktonzooplanktondolphinswhalessquid
Coral Reefsbeautifulbiologically diversecolonies of coral polyps, animals that secrete hard exoskeletons
videoDeep-sea Ventshydrothermal vents: spots on the ocean floor where hot gases and minerals escape from Earths interiorno sunlightchemical energyproducers: prokaryotes that use energy from sulfurtube wormsclamsvideo
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