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Interconnectivities in Forests Jon Honea
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What is important about a forest?
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What kinds of interactions and relationships bind species together?
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Energy acquisition Where does the energy come from? What organisms make it available/usable for other types of organisms? Photosynthesis video1 (choose one with ATP synthesis)Photosynthesis video Photosynthesis video2Photosynthesis video
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Species interactions Predator-prey Competition Mutualism Parasitism Cumulative, multiple, indirect complex super- hard to trace and study interactions
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Predator-prey Centipede Centipede (same video, alternative stream)Centipede
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Competition For resources in limited supply.
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Mutualism or Symbiosis Examples?
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Pollination
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What characteristics of seeds might be involved in getting them to a good spot to germinate? Seed dispersal
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Tasty Volant (flighty) Sticky
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What is this?
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Morkpork covered in sticky bird-catcher tree seeds
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Morkpork cleaned (then released 4 days later) Images and rescue courtesy of the Whangarei Native Bird Recovery Centre
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Mutualism or Symbiosis African fig ecosystem Others?
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Parasitism
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Parasitism: spruce budworm
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Parasitism: mountain pine beetle
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Nutrient Cycling and Transfer Decomposition
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Salmon
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Dead salmon
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Pathways of Nutrients from Salmon
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Hydrologic Cycle
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Key factors affecting streams are controlled by their watersheds!! Why should we look at watersheds if we’re concerned about water quality?
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Succession
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One of those “cumulative, multiple, indirect complex super-hard to trace and study interactions” Some driving processes we’ve discussed: –Predator-prey –Competition –Mutualism –Parasitism –Nutrient cycling –Hydrologic cycle Video
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Biodiversity Why is biodiversity important? Insurance hypothesis. Influences invasion by exotic species. Ethical reasons: stewardship.
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