Coastal - Hawaiian Ecosystems at Risk project

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Acetate #9 Activity #1 Coastal Unit 3 Acetate Master Mystery #6 Theories about isolation and speciation hold that shrimp species that live thousands of miles apart should have evolved into separate species. What can explain the fact that populations of the same shrimp species are found thousands of miles apart? Observation #1 Observation #2. Observation #3 Observation #4 Observation #5 Photo: John Hoover, Hawaiÿi’s Sea Creatures, Mutual Publishing The shrimp Antecaridina lauensis (Al), Halocaridina rubra (Hr), and Metabetaeus lohena (Ml) can live up to 5 years in aquariums. They live longer than other types of small shrimp. All of the small, red shrimp found in the anchialine ponds can tolerate a wide variation in “salinity” (saltiness of the water), but they must have a little bit of seawater in the mix. They can live in pure ocean water. All these shrimp need dark, underground crevices. While human beings have mostly seen them in the ponds, the shrimp probably do not need to come into ponds. While Ligur uveae (Lu) is found in ponds in other parts of the world, it has never been seen in a pond in Hawaiÿi. Here, it has been seen by divers only in underwater caves. While we tend to associate the shrimp with anchialine ponds, it is possible that they do not need to live in or on “emergent land” (land that comes out of the water, an island). On islands where populations of the shrimp have been found in anchialine ponds, the shrimp sometimes show up in new holes in the ground such as a bomb crater, wells, and quarries, as well as in ponds in recent lava flows. This suggests that they have migrated through underground crevices to enter these new holes, so there is probably an extensive underground population. Only two of the many species of small, red shrimp are endemic to an area. Since isolation generally results in the evolution of new species, this seems to indicate that larvae are passively floating in currents between these various areas. But in many places the currents don’t go the right way! Anchialine Detectives • Höÿike o Haleakalä 19
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Höÿike o Haleakalä Haleakalä re
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© Copyright 2001 by Hawaiÿi Natur
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Acknowledgements Höÿike o Haleaka
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Introduction Höÿike o Haleakalä
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How to Use This Curriculum Höÿike
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• Activity Instructions and Mater
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Coastal Module Coastal Module You a
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••• Ecosystem Summary Where o
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Coastal Module farming, and clearin
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Coastal Module Unit 2 Coastal Conne
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Coastal Module Unit 4 Fire Ants and
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Coastal Module ••• Optional F
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Coastal Module Extensions • The H
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Coastal Unit 1 Unit at a Glance Act
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Coastal Unit 1 • Visit one of the
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Activity #1 Coastal Unit 1 3) Ask s
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Some teacher-only resources have be
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Activity #1 Coastal Unit 1 Acetate
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Activity #2 Coastal Unit 1 Activity
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Information Station Graphics Activi
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Activity #2 Coastal Unit 1 Photocop
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Activity #2 Coastal Unit 1 Photocop
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Kanahä Beach Aerial Photo Activity
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Coastal Unit 2 Unit at a Glance Act
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4 Coastal Connections • Höÿike
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Activity #1 Coastal Unit 2 4) Divid
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