HomeMy WebLinkAboutCOM 0451.001 2016-2018 Eileen O'Hara v,qf Phone: (808) 965-2712
Council Member :-��:• �f h�`•`;.•;'•,.. Fax: (808) 961-8912
�,'l J' Email: eileen.ohara hawaiicount ov
Council District 4 ;{:� #': @ Y•9
Chair: Environmental = Vice Chair: Planning Committee and
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Management Committee • tE 6F•H�''_� Agriculture, Water&Energy
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Sustainability Committee
County of Hawaii
Hawaii County Council
25 Aupuni Street, Suite 1402 • Hilo, Hawaii 96720
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DATE: September 28, 2017
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TO: Valerie T. Poindexter, Council Chair
and Members of the Hawai`i County Council
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FROM: Eileen O'Hara, Council Member r --
SUBJECT: Presentation materials: "Rainfall Driven Shifts in Staphylococcus aureus in Hilo
Bay"
Attached please find a power point titled: "Rainfall Driven Shifts in Staphylococcus aureus in
Hilo Bay"that will be presented in the Environmental Management Committee meeting on
October 3, 2017.
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Att.
C®rnrn. No. Lick I
Ref. To:
Ref. Date OCT 0 3 2017
Rainfall Driven Shifts in
Staphylococcus aureus in Hilo Bay, Hawaii
Louise M. Economy
University of Hawaii at Hilo - TCBES
Advisor: Dr. Trac N. Wie ner ' ®A
Y gCLI MATO'M
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SCIENCE
CENTER
HU1J'oL1 MUU LOU Committee Members: Drs. Jon Awaya & Ayron Strauch PICSIC
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Bea c h g o e rs 4x more |ikelyƒ o develop S. aureus skin infections
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Research Questions
1) How does rainfall and stream flow influence S. aureus in coastal
waters?
2) Where does S. aureus exist within the watershed?
Study Site: Hilo, Hawaii
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Microbial Analyses
S. aureus increases with heavy rainfall
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0
CD
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U LP
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p = 0.001
t = 8.051
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Wailoa River Mouth
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p < 0.005
z = 8.587 #
Reed's Bay
0.0 0_ 0.4 0.6 0.8 1.0 1_ 0.0 0_ 0.4 0.6 0.8 1.0 1_
Log Rainfall (cm)
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iver
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Wailuku River ;�e
Wailoa River
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S. aureus increases with heavy rainfall
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CD
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CD
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CD
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Wailuku River Mouth
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0.0 0.2 0.4 0.0 0_ 1.0
Log Rainfall (cm)
S. aureus increases with greater stream flow
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0
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CD
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Log Maximum Stream Flow (cfs)
S. aureus increases following dry flow conditions
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LO
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p < 0.001 0
t = 5.246
C, C, C1 C-14 0.6 0.8 1 0
Log Flow/7 Day Average
S. aureus is present at river mouth & upstream
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Mouth Upstream
S. aureus is in the Hilo watershed
Soil
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Sand
Wastewater
Urban Run-off
S. aureus is present in forest soils
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P = 0.10
10 W = 67.0
0.8
0.61
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m
Ungulate
Ungulate -Free
S. aureus is in the Hilo watershed
Soil
O
Sand
Wastewater
Urban Run-off
S. aureus is present in beach sands
p=0.031
z = -2.164
Honoli'i Bayfront Onekahakaha Richardson's
S. aureus is in the Hilo watershed
Soil
O
Sand
Wastewater
Urban Run-off
S. aureus is present in wastewater & road run-off
Conclusions
• High rainfall and stream flow leads to increased
S. aureus in coastal waters
• The landscape is a likely source of S. aureus
• Climate change could influence S. aureus loading to
coastal waters
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ahalo nuiISLANDSCLIMATE 11 CENTER
c•more HWOLI Mnu LOO PICSC
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Dr. Tracy Wiegner, Dr. Ayron Strauch, Dr. Jon Awaya, Chad Shibuya, Lori Ueno, Leilani Abaya, Jazmine
Panelo, Caree Edens, Melia Takakusagi, Tyler Gerkin, Carmen Garson-Shumway, Tara Holitzki, Eric
Johnson, Jon Marusek, Stephen Kennedy, Anne Veillet, Dr. Lynn Morrison, Josh Lapinta, Senfia
Annendale, James Gomez Demolina, Mikayla Jones, Hoang -Yen Nguyen, Sharon Ziegler -Chong, Scott
Laursen, Noelani Puniwai, Barb Bruno, Kim Thomas, Dr. Steven Colbert, Lisa Pearring, Kade Economy,
Debbie Beirne, Jill Grotkin, Ron Kittle, Etta Karth, and Jesse Gorges