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Implications for the future

Life history characteristics and habitat selection of ‘ Opae k ala’ole over a strong precipitation gradient. Implications for the future. Ralph W. Tingley III 1 , Richard MacKenzie 2 , Dana M. Infante 1 , Ayron M. Strauch 3

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Implications for the future

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  1. Life history characteristics and habitat selection of ‘Opaekala’ole over a strong precipitation gradient Implications for the future Ralph W. TingleyIII1, Richard MacKenzie2, Dana M. Infante1, Ayron M. Strauch3 Department of Fisheries and Wildlife, Michigan State University, East Lansing, MI Institute of Pacific Island Forestry, Pacific Southwest Research Station, Hilo, HI University of Hawaii, Manoa, HI

  2. Climate change and Hawai’i’s freshwater systems • Climate change may lead to decreased flow in Hawai’i’s freshwater streams • Increase in air temperature, amplified at high elevations (Giambelluca2008) • Changes or shifts in annual precipitation • Expansion of strawberry guava • USGS has shown a 10% decrease in stream flow over the last 30 years (Oki 2003) • How might these changes impact stream biota? • How can we study this impact?

  3. Space for time: Differences across a precipitation gradient • Unique and extreme gradient in precipitation • Similar landscape and land cover characteristics

  4. ‘Opaekala’ole in a changing world • Why focus on shrimp? • Keystone species • Culturally important • Opportunity to gain knowledge on life history • Does variation in annual precipitation alter life history characteristics, abundance and habitat selection? hawaii.edu/hsrc/home/timbolsv.htm • Growth rate • Secondary production • Fecundity • Habitat selection • Abundance

  5. Sampling methods 1. Production and growth rate • Capture-mark-recapture 2. Fecundity • # gravid females and weight 3. Abundance/habitat selection • Random 1 m2 visual estimates • Stratified by habitat type hbs.bishopmuseum.org/waipio/Critter%20pages/atyoida.html

  6. Anticipated results • In streams with less precipitation (i.e. flow): • Growth rate • Secondary production • Gravid females • Individual fecundity • Pool occupancy • Density hawaii.gov/dlnr/dar/streams_native_animals.html

  7. Benefits and applications • Immediate applications • Better understanding of life history characteristics • Insight into habitat selection of freshwater shrimp throughout the tropics • Define in-stream flow thresholds • Web-based management tool • Future directions • Use results and climate change projections to predict distribution and abundance changes • Explore relationships between abundance and land cover

  8. Acknowledgements • Dr. Christian Giardina, Dr. Gordon Smith, Dr. Robert Nishimoto, Dr. Greg Bruland • Tara Holitzki • USDA Forest Service • Division of Aquatic Resources • HFHP Partnership • University of Hawai’i at Manoa • Kamehameha Schools • Michigan Sate University • USGS

  9. Mahalo!

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