implications for the future
DESCRIPTION
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 - PowerPoint PPT PresentationTRANSCRIPT
Life history characteristics and habitat selection of ‘Opae kala’ole
over a strong precipitation gradient
Implications for the future
Ralph W. Tingley III1, Richard MacKenzie2, Dana M. Infante1, Ayron M. Strauch3
1 Department of Fisheries and Wildlife, Michigan State University, East Lansing, MI2 Institute of Pacific Island Forestry, Pacific Southwest Research Station, Hilo, HI
3 University of Hawaii, Manoa, HI
Climate change may lead to decreased flow in Hawai’i’s freshwater streams Increase in air temperature, amplified at high
elevations (Giambelluca 2008) 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?
Climate change and Hawai’i’s freshwater systems
Space for time: Differences across a precipitation gradient
Unique and extreme gradient in precipitation
Similar landscape and land cover characteristics
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?
‘Opae kala’ole in a changing world
Growth rate Secondary
production Fecundity Habitat selection Abundance
hawaii.edu/hsrc/home/timbolsv.htm
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
Sampling methods
hbs.bishopmuseum.org/waipio/Critter%20pages/atyoida.html
Anticipated results
Growth rate Secondary production Gravid females Individual fecundity
In streams with less precipitation (i.e. flow):
Pool occupancy Density
hawaii.gov/dlnr/dar/streams_native_animals.html
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
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
Mahalo!