Lesson 1: Diving Into Ocean Ecosystems
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Transcript of Lesson 1: Diving Into Ocean Ecosystems
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Lesson 1: Diving Into Ocean Ecosystems
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Top 10 Facts: Ocean – Stop early at 8:55 (or mute)!
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Introduction to Aquatic Science• Day 1 Agenda:• Housekeeping, textbooks, classroom procedures• Intro to the World’s Oceans• World’s Oceans Activity• Review continents/oceans
• http://www.purposegames.com/game/123• http://www.purposegames.com/game/the-world-oceans-quiz-quiz
• World’s Oceans and Seas Map
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Friday 8/29/14• Agenda• Review Organism presentations• World’s Oceans and Seas• The Water Planet• Intro to Marine Ecosystem Project• Project time
• Homework
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The wide-open ocean holds many mysteries. Physics, chemistry, biology, and Earth science concepts and ideas help scientists solve them. Fig 1.1
Earth’s biography: Oceans
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The ocean is home to a wide variety of marine ecosystems, some of which you will study in this Lesson. In every ecosystem, whether land or marine, there is interaction between biotic and abiotic factors. Fig. 1.5
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Intro to Marine Ecosystem Project
• Consider the area where you live or go to school – your neighborhood. List 3 biotic and 3 abiotic factors in your land-based neighborhood.
• Recall from Bio 1 – what is the difference between biotic and abiotic?
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Marine Ecosystems• Open Ocean• Coral Reef• Kelp Forest• Mangrove Forest• Deep Ocean• Rocky Shore• Polar Sea• Salt Marsh
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Poster Presentation
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Marine Ecosystem Project Day 1/2• In your groups, go to e-Tools, click on your ecosystem.• In your notebook, in your own words!•Use the website links for your ecosystem. •Answer the questions on your project sheet.•Once completed, report findings on posterboard. •Be creative, poster must answer ALL questions.•Use pictures, charts, tables, etc.
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Marine Ecosystem Project: Day 3•Scientific Conference:•Finishing touches on poster.•Label ecosystem on classroom map.•Gallery Walk•Record accurate notes, these will serve as your notes for this section!
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Thursday 9/4/14• Agenda• Label Marine Ecosystems on World Map• Continue with Lesson 1 Guided Notes
• Whale Fall Events – Ecological Succession
• Power of the Planet: Oceans Video• Fly swatter Thursday – prep for quiz tomorrow• Review Study Packet p. 1-6
• Homework:• Prepare for Marine Ecosytem Quiz tomorrow• Lesson 1 Test on Monday
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World Map Activity – Visit http://go.hrw.com/atlas/norm_htm/oceans.htm
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Human Impacts on Marine Ecosystem
• https://www.nceas.ucsb.edu/globalmarine
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Changing Ecosystems
Case Study 1 – Whale Falls
• While you watch, answer the following ?’s in your journal:• What do you observe happening?
• About how many diff types of organisms do you see?
• Do you this is the result of a natural event of human activity? Why?
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Whale fall – Ecological succession
• Blue Whales are largest animal to have ever lived on Earth. • Whales have the longest migration of all mammals. • Ex: Humpback – 8000 km (~5000 miles)
• Average life span is longer than a human.• When they die, they sink to seafloor. This is known as
a whale fall.
Largest living things of all time
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They either wash ashore, or sink to bottom.
• Whale explosion
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Ecological Succession• The next series of images shows the decomposition of
a whale carcass if it sinks to the bottom over a period of 7 years…
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(E) March 2009. 85 months since initial scientist visit.
February 2002. Initial visit by scientists (~6 months after the whale fall event);
(B) December 2004. 34 months since initial scientist visit; (C) November 2005. 45 months since initial scientist visit; (D) December 2007. 70 months since initial scientist visit;
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Whale Fall Event• Introduces abundance of
nutrients to a specific area of the seafloor.• Carcass at 40 tons can have 2-
3000 kg of lipids in skeleton.• Use ROVs – (Remote Operated
Vehicles) equipped with high def cameras to observe• Variety of organisms
decompose whale and move available nutrients into marine food web.
Weird vimeo
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During a whale fall event organisms are grouped based on when they arrive and what they eat.• Background specialists• Species that remove flesh or soft tissue from carcass• Arrive early and remain present throughout entire
decomposition• Examples
• Deepwater fish• Blob sculpin• Snubnose eelpout• Hagfishes• Sleeper sharks
• Worms• Shrimps• Crabs• Many scavengers
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Background specialists
Hagfish/lamprey
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Background specialists
• Snubnose eelpout
• blobfish
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Organisms grouped:• Bone specialists• Once flesh removed, these guys show up.• Present for long period, living off oil
in whale bone.• Where do you think most
of the oil in whales comes from?• 60% of bones can be oil!
• Examples• Osedax – marine worm• 5 minute listen
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Organisms grouped:• Species with unclear connections• Group is not seemingly dependent on whale fall
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Graph Interpretation:• What do you notice about the
groups of organisms that are present at the whale carcass over time? • Can you explain the increase in bone
specialists after Month 21?• How might you explain increase in
background specialists between Month 21 and 24?• How might you determine if your
analysis in the questions above is accurate?
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Class discussion• What do you notice about the groups of organisms
that are present at the whale carcass over time?
• The number of background specialists varies, however, they remain present over the entire decomposition process. The number of bone specialists is lowest in the initial stages of the decomposition and increases after 21 months. The presence of species with unclear connections varies over time.
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Class discussion• Can you explain the increase in bone specialists after
Month 21?
• By this time all of the flesh was likely removed from the whale carcass, exposing whale bone. Bone specialists increased in number because of the availability of bone on which to feed.
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Class discussion• How might you explain increase in background
specialists between Month 21 and 24?
• It is possible that organisms categorized as background specialists include those that feed on bone specialists. Predators of bone specialists may arrive at this time. These organisms may or may not be included in the species with unclear connections.
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Class discussion• How might you determine if your analysis in the
questions above is accurate?
• Student answers will vary but should include the topic of conducting additional research and consulting with scientists in the field.
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Case Study 2 – Mangrove Restoration• Have you ever been to a mangrove forest?
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Mangrove forests• Found along coast where fresh water meets salt water• Also known as “botanical amphibians”• Subtropical and tropical latitudes near Equator• Carribbean• Australia• India
• Cover <8% of Earth’s coastlines• Organisms can survive in brackish water (slightly
salty)• One of the most diverse ecosystems
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Mangrove forests• 4 main groups of mangroves• Red mangroves• Black mangroves• White mangroves• Buttonwoods
• Provide a stabilizing barrier between land and water• Reduce erosion during storms and hurricanes• Filter fresh water entering ocean from land• Reduce pollutants (mercury, lead) and excess sediment
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National Geographic • Despite their strategic importance, mangroves are
under threat worldwide. They are sacrificed for salt pans, aquaculture ponds, housing developments, roads, port facilities, hotels, golf courses, and farms. And they die from a thousand indirect cuts: oil spills, chemical pollution, sediment overload, and disruption of their sensitive water and salinity balance.- National Geographic
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Global distribution of Mangroves
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Mangrove Restoration• Compare the biotic and abiotic factors in the photographs
above.
• How do the differences observed between A and B demonstrate succession?• Root word – succeed “to come after something”
Photograph Biotic Factors Abiotic Factors
A
B
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Mangrove Restoration• Copy chart into your notebook. Compare the biotic
and abiotic factors in the photographs above.
• How do the differences observed between A and B demonstrate succession?
Photograph Biotic Factors Abiotic Factors
A Trees in background, shrubs
Water, ample sand, sunlight, small rocks
B Grasses, plants in foreground, trees in
background
Water, sunlight, small amount of exposed sand
along shore
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Mangrove History• 1996 – Florida passed Mangrove Trimming and
Preservation Act to preserve and protect mangroves as a natural resource.• Unfortunately, mangroves are in danger.• Since 1980 – 20 % of world’s mangroves have been
lost due to human activity and natural events. • Scientist now know that mangroves can reestablish
themselves in 15-30 years if area is left alone, not altered by humans, and natural source of mangrove seeds.
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Discussion• Based on your research of marine ecosystems, what
are some of the problems that living things in the ecosystem you studied have faced?• In your group, list some factors that could affect ecosystem
that you researched.
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Coral Reef Climate ChangeGhost fishing gearPollutionCoastal developmentHabitat destruction
Kelp Forest Habitat destructionPollution
Mangrove Forest Coastal developmentPollutionHabitat destruction
Open Ocean OverfishingPollution/marine debrisBycatch
Deep Ocean PollutionGhost fishing gear
Rocky Shore Coastal developmentPollution
Polar Sea Climate ChangePollutionOverfishing
Salt Marsh Coastal development, Pollution, Overfishing
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What are National Marine Sanctuaries?• NMS are America’s underwater
treasures
• System of 14 Marine Protected Areas (MPAs) that encompass nearly 25,000 square km miles.
• Marine and Great Lake waters from Washington State to Florida Keys and from Lake Huron to American Samoa
170,000
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National Marine Sanctuaries
• Scientists conduct formal research in sanctuaries to learn about the ecosystem and the organisms that inhabit• You can’t protect something you
don’t know about!• Protect endangered species and
historically significant shipwrecks• Range from <1 sq km to 362,074
sq km
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National Marine Sanctuaries• Largest is Papahanaumokuakea created during George
W. Bush’s term in 2006 (scroll down to google street view)• Actually a Marine National Monument (offer more
protection than NMS)• Northwest Hawaiian Islands• Commercial fishing not allowed• Tourism limited• Florida Keys NMS is the most accessible to visitors