Time series of avg daily zooplankton concentration in shoal water within the surf zone at Sand City, Monterey Bay, California in 2010 (Surf zone larval transport project)

Website: https://www.bco-dmo.org/dataset/562015
Version: 01 July 2015
Version Date: 2015-07-01

Project
» Does coupling between the inner shelf and surf zone regulate larval supply to intertidal populations? (Surf zone larval transport)
ContributorsAffiliationRole
Shanks, Alan L.University of Oregon (OIMB)Lead Principal Investigator, Contact
MacMahan, JamieNaval Postgraduate School (NPS)Co-Principal Investigator
Morgan, StevenUniversity of California-Davis (UC Davis-BML)Co-Principal Investigator
Reniers, AdDelft University of Technology (TU Delft)Co-Principal Investigator
Rauch, ShannonWoods Hole Oceanographic Institution (WHOI BCO-DMO)BCO-DMO Data Manager


Dataset Description

Time series of average daily zooplankton concentration in shoal water within the surf zone at Sand City, CA. (36.615760 degrees N, 121.85485 degrees W).


Methods & Sampling

From 27 June to 15 July we sampled zooplankton within the shoal water within the surf zone at Sand City, California.  Sampling occurred during a daytime low tide. Samples were taken with a 200 um mesh 0.25 m^2 plankton net that was equipped with a flow meter to determine the volume of water filtered. Three replicate samples were collected daily by swimmers. The swimmer carried the net into the center of the shoal and held the net into the on coming waves which forced water through the net. The net filtered an average of 2 m^3 per tow. Samples were preserved in buffered formalin. Zooplankton were identified and enumerated using dissecting microscopes.


Data Processing Description

Three samples were collected each day in the waters over the shoals in the surf zone. Counts from the microscopic analysis of the samples were converted to number per m3 and the average and 95% confidence interval for each daily set of samples were calculated. Note that blanks in the data set represent missing data values (BCO-DMO has changed blanks to 'nd'.)

BCO-DMO Processing:
- Re-formatted date, and added separate columns for month, day, year, and year-day.
- Added column containing site name.
- Added lat and lon (from metadata form).
- Modified parameter names to conform with BCO-DMO naming conventions.
- Replaced blanks (missing data) with 'nd' to indicate 'no data'.


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Data Files

File
SandCity_Shoals_Zoo2010.csv
(Comma Separated Values (.csv), 3.39 KB)
MD5:a62a6131842739af0f592ff0928d4b5b
Primary data file for dataset ID 562015

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Parameters

ParameterDescriptionUnits
site_name

Name of the sampling site.

text
lat

Latitude of the sampling site.

decimal degrees
lon

Longitude of the sampling site.

decimal degrees
date

Month/day/year of sample collection.

mm/dd/yyyy
Copepod

Copepod ave #/m^3 (mean of the 3 replicate samples).

number per cubic meter (#/m^3)
Copepod_95CI

Copepod 95% confidence interval.

number per cubic meter (#/m^3)
Copepod_nauplii

Copepod Nauplii ave #/m^3 (mean of the 3 replicate samples).

number per cubic meter (#/m^3)
Copepod_nauplii_95CI

Copepod Nauplii 95% confidence interval.

number per cubic meter (#/m^3)
Harpacticoid

Harpacticoid ave #/m^3 (mean of the 3 replicate samples).

number per cubic meter (#/m^3)
Harpacticoid_95CI

Harpacticoid 95% confidence interval.

number per cubic meter (#/m^3)
Larvacean

Larvacean ave #/m^3 (mean of the 3 replicate samples).

number per cubic meter (#/m^3)
Larvacean_95CI

Larvacean 95% confidence interval.

number per cubic meter (#/m^3)
Cladoceran

Cladoceran ave #/m^3 (mean of the 3 replicate samples).

number per cubic meter (#/m^3)
Cladoceran_95CI

Cladoceran 95% confidence interval.

number per cubic meter (#/m^3)
Barnacle_stg_I_III

Barnacle stage I-III ave #/m^3 (mean of the 3 replicate samples).

number per cubic meter (#/m^3)
Barnacle_stg_I_III_95CI

Barnacle stage I-III 95% confidence interval.

number per cubic meter (#/m^3)
Barnacle_stg_IV_VI

Barnacle stage IV-VI ave #/m^3 (mean of the 3 replicate samples).

number per cubic meter (#/m^3)
Barnacle_stg_IV_VI_95CI

Barnacle stage IV-VI 95% confidence interval.

number per cubic meter (#/m^3)
Cyprid

Cyprid ave #/m^3 (mean of the 3 replicate samples).

number per cubic meter (#/m^3)
Cyprid_95CI

Cyprid 95% confidence interval.

number per cubic meter (#/m^3)
Emerita_stg_I

Emerita stage I ave #/m^3 (mean of the 3 replicate samples).

number per cubic meter (#/m^3)
Emerita_stg_I_95CI

Emerita stage I 95% confidence interval.

number per cubic meter (#/m^3)
Bivalves_veligers

Bivalves Veligers ave #/m^3 (mean of the 3 replicate samples).

number per cubic meter (#/m^3)
Bivalves_veligers_95CI

Bivalves Veligers 95% confidence interval.

number per cubic meter (#/m^3)
Gastropod_veligers

Gastropod Veligers ave #/m^3 (mean of the 3 replicate samples).

number per cubic meter (#/m^3)
Gastropod_veligers_95CI

Gastropod Veligers 95% confidence interval.

number per cubic meter (#/m^3)
Spionid_poly_larvae

Spionid Poly Larvae ave #/m^3 (mean of the 3 replicate samples).

number per cubic meter (#/m^3)
Spionid_poly_larvae_95CI

Spionid Poly Larvae 95% confidence interval.

number per cubic meter (#/m^3)
Other_polychaete_larvae

Other Polychaete larvae ave #/m^3 (mean of the 3 replicate samples).

number per cubic meter (#/m^3)
Other_polychaete_larvae_95CI

Other Polychaete larvae 95% confidence interval.

number per cubic meter (#/m^3)
Urchin_larvae

Urchin larvae ave #/m^3 (mean of the 3 replicate samples).

number per cubic meter (#/m^3)
Urchin_larvae_95CI

Urchin larvae 95% confidence interval.

number per cubic meter (#/m^3)
mon

2-digit month of year.

mm (01 to 12)
day

2-digit day of month.

dd (01 to 31)
year

4-digit year.

YYYY
yrday

Consecutive day of year (Jan 1st = 1)

dimensionless

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Deployments

SC_2010

Website
Platform
Sand_City_Surf_Zone
Start Date
2010-06-15
End Date
2010-07-15


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Project Information

Does coupling between the inner shelf and surf zone regulate larval supply to intertidal populations? (Surf zone larval transport)

Coverage: Sand City Beach and Carmel River State Beach, Monterey Bay, CA


Description from NSF award abstract:
Many intertidal invertebrates and fishes have complex life cycles that include a planktonic larval phase. At the end of their pelagic development, larvae must return to shore and cross the surf zone. The purpose of this study is to investigate for the first time the role of surf zone hydrodynamics in the rate of delivery of cyprids of intertidal barnacles to the shore. To exploit the greater physical oceanographic understanding of the hydrodynamics of sandy beach surf zones, this initial study will focus on cyprid settlement on hard substrates in surf zones associated with sandy beaches. In the first two years of the study, the investigators will carry out an intensive two-month physical and biological study of a reflective and dissipative surf zone, respectively. At each site they will sample cyprids in the waters of the inner-shelf, just outside the surf zone, and within the surf zone and they will measure settlement on plates in the intertidal zone. At the same time they will collect physical oceanographic data with both in-situ instruments and a fleet of GPS-equipped surface drifters to describe the hydrodynamics of the surf zone. The time series of the physical and biological data will be correlated to investigate mechanisms of delivery of cyprids to the shore. To simulate the hydrodynamic processes responsible for the transport of larvae, the investigators will use a 3D model, resolving both the horizontal and vertical structure of the unsteady nearshore flow. To evaluate potential transport of larvae through the surf zone, a biological module describing the spatial distribution of the larvae will be coupled to the hydrodynamic module to predict the pathways of the larvae and compare with observations. Intensive sampling will help provide insight into the actual processes transporting cyprids from the inner shelf, through the surf zone, and to the intertidal zone. During each summer, weekly barnacle recruitment and daily cyprid settlement will be measured for two months to settlement plates at reflective and dissipative beaches in central California and southern Oregon. Population densities at many beaches along the West Coast will be surveyed each year to determine if a latitudinal gradient in wave energy is correlated with adult barnacle population densities.

Because the fundamentals of surfzone dynamics are universal, results of this research will be broadly applicable not only along the West Coast, but worldwide. This project will have significant impacts on education and public outreach. It will support three graduate students and nine undergraduate students and will create new research opportunities for students of diverse backgrounds from three undergraduate institutions, local high schools and the public. The research will be included in the curriculum of intensive hands-on courses, and undergraduates will participate in the research while learning how a real-world research project addresses fundamental questions. Both a website that highlights findings and an interactive display for visitors to the Bodega Marine Laboratory will be developed. A model coupling nearshore hydrodynamics and onshore transport across the surf zone will be made available to the community to stimulate research into this emerging research topic.



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Funding

Funding SourceAward
NSF Division of Ocean Sciences (NSF OCE)

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