Barnacle larvae transport. Mikaela. Provost. Physical Oceanography 12/2/2010. California Current. Eastern edge of the North. . Pacific Gyre.. Moves south along the western coast of North America bringing cool water from Alaska to Baja California.. ID: 721270
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Presentations text content in California Current &
Slide1
California Current &
Barnacle larvae transport
Mikaela
Provost
Physical Oceanography 12/2/2010
Slide2
California Current
Eastern edge of the North
Pacific Gyre.
Moves south along the western coast of North America bringing cool water from Alaska to Baja California.
Slide3
What sustains the CA current?
- Westerlie
winds drive the California current
Slide4
Upwelling is characteristic
pfeg.noaa.gov
-
Ekman
transport offshore yields strong upwelling along the CA coast, supporting a high level of marine biodiversity
Slide5
Sea Surface Temperature
- Cool water, an indicator of upwelling.
- Transport can be as much as 300 m
3
/sec
- Strongest upwelling in summer
Slide6
Currents and barnacle recruitment
Question facing many marine ecologists: Observe large fluctuations in the abundance of barnacle stock populations, and yet the environment seems to be highly productive.
Each data point represents a total of 7 days of settlement of acorn barnacles on six 10 cm x 10 cm plates.
Slide7
Upwelling Intensity & Population Variability
- Higher recruitment associated with weaker cases of upwelling.
- Intertidal barnacle larvae carried offshore with strong upwelling, lower probability of encountering adult habitat for settlement.
Slide8
Reasons for variation in barnacle populations:
Slide9
References
Alexander and Roughgarden. 1996. Larval Transport and Population Dynamics of Intertidal Barnacles: A Coupled Benthic/Oceanic Model. Ecological Monographs 66: 259-275
Farrell
etal
. 1991. Cross-shelf transport causes recruitment to intertidal populations in central California.
Limnological
Oceanography 36: 279-288.
Shkedy
and
Roughgarden
. 1997. Barnacle recruitment and population dynamics predicted from coastal upwelling.
Download this presentation
DownloadNote - The PPT/PDF document "California Current &" is the property of its rightful owner. Permission is granted to download and print the materials on this web site for personal, non-commercial use only, and to display it on your personal computer provided you do not modify the materials and that you retain all copyright notices contained in the materials. By downloading content from our website, you accept the terms of this agreement.
Presentations text content in California Current &
California Current &
Barnacle larvae transport
Mikaela
Provost
Physical Oceanography 12/2/2010
Slide2California Current
Eastern edge of the North
Pacific Gyre.
Moves south along the western coast of North America bringing cool water from Alaska to Baja California.
Slide3What sustains the CA current?
- Westerlie
winds drive the California current
Slide4Upwelling is characteristic
pfeg.noaa.gov
-
Ekman
transport offshore yields strong upwelling along the CA coast, supporting a high level of marine biodiversity
Slide5Sea Surface Temperature
- Cool water, an indicator of upwelling.
- Transport can be as much as 300 m
3
/sec
- Strongest upwelling in summer
Slide6Currents and barnacle recruitment
Question facing many marine ecologists: Observe large fluctuations in the abundance of barnacle stock populations, and yet the environment seems to be highly productive.
Each data point represents a total of 7 days of settlement of acorn barnacles on six 10 cm x 10 cm plates.
Slide7Upwelling Intensity & Population Variability
- Higher recruitment associated with weaker cases of upwelling.
- Intertidal barnacle larvae carried offshore with strong upwelling, lower probability of encountering adult habitat for settlement.
Slide8Reasons for variation in barnacle populations:
Slide9References
Alexander and Roughgarden. 1996. Larval Transport and Population Dynamics of Intertidal Barnacles: A Coupled Benthic/Oceanic Model. Ecological Monographs 66: 259-275
Farrell
etal
. 1991. Cross-shelf transport causes recruitment to intertidal populations in central California.
Limnological
Oceanography 36: 279-288.
Shkedy
and
Roughgarden
. 1997. Barnacle recruitment and population dynamics predicted from coastal upwelling.
Oikos
80: 487-498.
http://mlo.stanford.edu/barnacles.htm