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Chesapeake Bay: An Introduction to an Ecosystem Section 4: Communities II-1E5: Bottom

Chesapeake Bay: An Introduction to an Ecosystem Section 4: Communities II-1E5: Bottom. View this quiz as a slide show from “the beginning”

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Chesapeake Bay: An Introduction to an Ecosystem Section 4: Communities II-1E5: Bottom

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  1. Chesapeake Bay: An Introduction to an Ecosystem Section 4: Communities II-1E5: Bottom View this quiz as a slide show from “the beginning” During the slide show, you can right click on any slide and choose pointer options then pen or highlighter to write on any slide. But you will need to right click & choose pointer options then arrow before you can click on any of the navigation links again. Click to Start

  2. II-1E5-1 The organisms that live on and in the bottom sediments of the Bay form complex communities. Known as ______________, these bottom-dwellers include animals, plants and bacteria.. benthos No hint Hint Answer Next Slide

  3. II-1E5-2 Benthic organisms often are differentiated by their habitat. ___________, like oysters, barnacles and sponges, live upon a surface. Epifauna No hint Hint Answer Next Slide

  4. II-1E5-3 Worms and clams, considered ____________, form their own community structure beneath the bottom sediments, connected to the water by tubes and tunnels. infauna No hint Hint Answer Next Slide

  5. II-1E5-4 The roots and lower portions of bay grasses supply the physical support for a variety of ___________ organisms. epiphytic No hint Hint Answer Next Slide

  6. II-1E5-5 An _________ bar‚ and the many species it supports, is another example of a benthic community. oyster No hint Hint Answer Next Slide

  7. II-1E5-6 What three animals make up benthic communities that exist on or in bare, unvegetatedsubstrate? Mollusks Worms Crustaceans No hint Hint Answer Next Slide

  8. II-1E5-7 What two factors affects the distribution of bottom-dwellers? Salinity Sediment type No hint Hint Answer Next Slide

  9. II-1E5-8 What is the best sediment for diverse benthic communities? a mixture of sand, silt and clay. No hint Hint Answer Next Slide

  10. II-1E5-9 Oysters need a ______________ surface, preferably another oyster shell, on which the larval spat can attach or set. clean hard No hint Hint Answer Next Slide

  11. II-1E5-10 Oysters form a reef community that is important habitat for other __________ species. benthic No hint Hint Answer Next Slide

  12. II-1E5-11 What two condition of the water and sediments does the benthic community affect? Physical chemical General terms Hint Answer Next Slide

  13. II-1E5-12 Some benthic animalsbuild tubes or burrows through which they pump water. ________ _________ _________, such as worms, plow through the sediments in search of food. Infaunal deposit feeders No hint Hint Answer Next Slide

  14. II-1E5-13 Many benthic animals bind sediments together as ______________ that remain at the bottom. fecal pellets No hint Hint Answer Next Slide

  15. II-1E5-14 ____________, such as adult blue crabs, scurry across bottom searching for food. Predators No hint Hint Answer Next Slide

  16. II-1E5-15 The feeding activities of benthic animals stir the sediments, increasing the rate of exchange of materials into the water column and increasing diffusion of benthic animals ___________ into the sediments oxygen No hint Hint Answer Next Slide

  17. II-1E5-16 Explain how filter feeders, like oysters and clams, can be harmed by pollutants. Filter feeders pump large volumes of water through their bodies and extract food from it. As they filter water for food, they also remove sediments and organic matter, cleaning the water. Since many chemical contaminants often are present in sediments, benthic fauna often are exposed to and harmed by pollutants No hint Hint Answer Next Slide

  18. II-1E5-17 Some benthic organisms are widely distributed but others are limited more by _________ which also determines the distribution of certain benthic predators, parasites and diseases. salinity No hint Hint Answer Next Slide

  19. Match the benthic organism to the salinity it requires. II-1E5-18 __ hard clams __ freshwater mussels __ soft-shelled clams __ Brackish water clams __ oysters Higher saline waters Mid-salinity waters Lower salinities A C B C A No hint Hint Answer Next Slide

  20. II-1E5-19 ____________, a lethal parasite has decimated oyster populations of the mid-Bay. MSX 3 initials Hint Answer Next Slide

  21. II-1E5-20 ___________, a disease caused by another parasite, has decimated oyster populations of the lower Bay. Dermo Sounds like a skin disease Hint Answer Next Slide

  22. II-1E5-21 Oyster drills starfish _______________ and _____________, which feed on oysters, are less of a problem in upper Bay waters because of their intolerance to low salinities. No hint Hint Answer Next Slide

  23. II-1E5-22 Label the organisms in the bethnic community K L D F __ Black-fingered mud crab __ Skilletfish __ Soft-shelled clam __ Atlantic oyster drill __ American oyster G L E B M __ Ivory barnacle __ Skilletfish __ red ribbon worm __ Glassy tubeworm __ A hard clam __ Whip mudworms __ Oyster spat __ Common clam worm A H J C Hint – word bank Answer – click hint 1st Last Slide

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