[Directory] [Data...]

Data server object:  PAR




  
    PAR from rocky intertidal zone moorings along the Oregon and California coasts, 2008-2015 (ACIDIC project)
    
  
  
    
    

PAR from rocky intertidal zone moorings along the Oregon and California coasts, 2008-2015 (ACIDIC project)

Website: https://www.bco-dmo.org/dataset/657810
Data Type: Other Field Results
Version:
Version Date: 2016-09-01

Project
» The role of calcifying algae as a determinant of rocky intertidal macrophyte community structure at a meta-ecosystem scale (ACIDIC)
ContributorsAffiliationRole
Nielsen, Karina J.San Francisco State University (SFSU-RTC)Principal Investigator
Chan, FrancisOregon State University (OSU)Co-Principal Investigator
Hacker, Sally D.Oregon State University (OSU)Co-Principal Investigator
Menge, Bruce A.Oregon State University (OSU)Co-Principal Investigator
Copley, NancyWoods Hole Oceanographic Institution (WHOI BCO-DMO)BCO-DMO Data Manager


Dataset Description


Acquisition Description

Photosynthetically Active Radiation (PAR; 400-700 nm) was recorded using a pair of data logging PAR sensors deployed to the shoreline at different elevations. Irradiance was measured using a LiCor 190 PAR sensor together with a universal transconductance amplifier (EME systems) to amplify the micro-amp current output of the PAR sensor and then recorded to a datalogger (Onset Hobo). The entire assembly was housed in a custom-molded waterproof case with a window of spectrally unbiased Plexiglas. The base had stainless steel mesh straps embedded in it to bolt the case to the rock, and leveling feet to level the sensor. The case was affixed to the rock by eight stainless steel lag screws and high tension plastic anchors set into pre-drilled holes. PAR data were recorded every 15 minutes. One PAR sensor (UWPAR) was located in the intertidal zone (~ 0-0.3 m above MLLW) and therefore experiences both underwater and above water periods, depending on the tidal cycle.  The second PAR sensor (TPAR) was deployed well above the intertidal zone on an adjacent terrestrial rocky bench or cliff and only measures out of water irradiance.


Processing Description

The voltage data were converted to photosynthetic photon flux (mmol m-2 s-1) using the LiCOR scale factors associated with each PAR sensor (PAR = (voltage/0.2)*scale factor) (Table 1). The data for each year were normalized to the maximum value on a clear day near the summer solstice at local solar noon, and then scaled to the modeled clear sky value for PPF for local solar noon using an online calculator (http://clearskycalculator.com/quantumsensor.htm) based on the ASCE Standardized Reference Evapotranspiration Equation, American Society of Civil Engineers. 

Reston, Virginia, USA. 2005 (http://www.kimberly.uidaho.edu/water/asceewri/index.html).

Table 1. LiCOR manufacturer scale factors (PDF)

BCO-DMO Processing:

- Replaced blanks in site name with underscores
- Commented out line 2, the units
- Converted from PC to Unix formatted .csv files
- Converted to jgofs format for faster serving


[ table of contents | back to top ]

Parameters

ParameterDescriptionUnits
site_namemooring location name unitless
site_codemooring location code unitless
latlatitude; north is positive decimal degrees
lonlongitude; east is positive decimal degrees
yearyear year
monthmonth month
dayday of month (UTC) days
hourhour of day (UTC) hours
minuteminutes (UTC) minutes
secondseconds (UTC) seconds
ISO_DateTime_UTCDate/Time (UTC) based on ISO 8601:2004E. Format: YYYY-mm-ddTHH:MM:SS[.xx]Z (UTC time) unitless
yrday_utcUTC day and decimal time: eg. 326.5 for the 326th day of the year or November 22 at 1200 hours (noon). unitless
PARPhotosynthetically Available [Active] Radiation micromoles photons/meter^2/second
serial_noserial number of PAR sensor unitless
locationwhether mooring is on land or intertidal zone unitless


[ table of contents | back to top ]

Instruments

Dataset-specific Instrument Name
Generic Instrument Name
Radiometer
Dataset-specific Description
Irradiance was measured using a LiCor LI-190R Quantum Sensor together with a universal transconductance amplifier (EME systems) to amplify the micro-amp current output of the PAR sensor and then recorded to a datalogger (Onset Hobo).
Generic Instrument Description
Radiometer is a generic term for a range of instruments used to measure electromagnetic radiation (radiance and irradiance) in the atmosphere or the water column. For example, this instrument category includes free-fall spectral radiometer (SPMR/SMSR System, Satlantic, Inc), profiling or deck cosine PAR units (PUV-500 and 510, Biospherical Instruments, Inc). This is a generic term used when specific type, make and model were not specified.


[ table of contents | back to top ]

Deployments

KH_intertidal_2008-2015

Website
Platform
Kibesillah Hill Ecological Time-Series Station
Start Date
2010-01-01
End Date
2015-12-29
Description
Long-term monitoring site

BH_intertidal_2008-2015

Website
Platform
Bodega Head State Marine Reserve Intertidal Long-Term Ecological Research Site
Start Date
2008-03-13
End Date
2015-12-31
Description
Long-term monitoring site

CA_intertidal_2007-2013

Website
Platform
PISCO Cape Arago Ecological Time-Series Station
Start Date
2007-05-07
End Date
2013-10-06
Description
Long-term monitoring site

CB_intertidal_2008-2014

Website
Platform
PISCO Cape Blanco Ecological Time-Series Station
Start Date
2008-04-22
End Date
2014-09-02
Description
Long-term monitoring site

CM_intertidal_2012-2014

Website
Platform
PISCO Cape Mendocino Ecological Time-Series Station
Start Date
2012-05-09
End Date
2014-08-14
Description
Long-term monitoring site

FC_intertidal_2009-2015

Website
Platform
PISCO Fogarty Creek Intertidal Long-Term Ecological Research Site
Start Date
2009-03-06
End Date
2015-10-26
Description
Long-term monitoring site

MC_intertidal_2009-2015

Website
Platform
Moat Creek Ecological Time-Series Station
Start Date
2009-01-01
End Date
2015-12-31
Description
Long-term monitoring site

POH_intertidal_2009-2014

Website
Platform
PISCO Port Orford Head Ecological Time-Series Station
Start Date
2009-02-28
End Date
2014-10-10
Description
Long-term monitoring site

RP_intertidal_2008-2014

Website
Platform
PISCO Rocky Point Ecological Time-Series Station
Start Date
2008-05-09
End Date
2014-10-08
Description
Long-term monitoring site

SH_intertidal_2009-2015

Website
Platform
PISCO Strawberry Hill Intertidal Long-Term Ecological Research Site
Start Date
2009-03-07
End Date
2015-10-30
Description
Long-term monitoring site

YB_intertidal_2008-2015

Website
Platform
PISCO Yachats Beach Ecological Time-Series Station
Start Date
2008-05-07
End Date
2015-10-26
Description
Long-term monitoring site


[ table of contents | back to top ]

Project Information

The role of calcifying algae as a determinant of rocky intertidal macrophyte community structure at a meta-ecosystem scale (ACIDIC)

Coverage: US West Coast; North bounding latitude: 45.00N, South bounding latitude: 38.00N


Algal Communities in Distress: Impacts and Consequences (ACIDIC)

Environmental stress models have recently been modified to incorporate the influence of facilitation to join negative effects such as predation, competition, and abiotic stress as determinants of community structure. Nevertheless, our empirical understanding of the processes that regulate the expression of facilitation effects across systems and the potential for facilitation to amplify or dampen the ecological consequences of climate change remains limited. This project focuses on facilitation dynamics in the broader meta-ecosystem concept, which hypothesizes that variation among communities depends not only on locally-varying species interactions and impacts of abiotic factors such as environmental stress and physical disturbance but also on regionally- and globally-varying ecosystem processes such as dispersal and flows of materials such as nutrients and carbon. The investigators will study the influence of a potentially critical facilitative interaction between coralline algal turfs and canopy-forming macrophytes including kelps and surfgrass in a rocky intertidal meta-ecosystem. The research will be conducted in a climate change context, with a focus on how the macrophyte-coralline interaction is influenced by ocean conditions, including factors driven by variable upwelling (temperature, nutrients, phytoplankton abundance, and light) and increases in ocean acidification, which vary in a mosaic pattern along the coast of the northern California Current (NCC) in Oregon and northern California.

The goal of the project is to test the hypothesis that the coralline turf-macrophyte canopy interaction is a cardinal interaction in the determination of low rocky intertidal community structure, and that disruption of this interaction would dramatically alter the structure and function of this kelp- and surfgrass-dominated assemblage. The project will take advantage of, and enhance, a research platform established across 17 sites spanning ~800 km in the NCC coastal meta-ecosystem with prior NSF funding that will at each site: (1) quantify ocean conditions, including temperature, nutrients, phytoplankton, light (PAR), and carbonate chemistry to document the response of community structure oceanographic variation across a meta ecosystem mosaic; (2) carry out field experiments testing the nature of the interaction between coralline algal turfs (primarily Corallina vancouveriensis) and dominant canopy species, the kelp Saccharina sessile and the surfgrass Phyllospadix scouleri; and (3) carry out laboratory experiments focusing on the mechanism of the interaction, specifically testing the effects of carbonate chemistry, light, temperature, and nutrients. Component (1) will employ both remote sensors deployed in the intertidal (fluorometers, thermal sensors, PAR sensors, and a recently developed pH sensor) and direct sampling (nutrients, phytoplankton, pCO2, and pH) to quantify the in situ exposure regime of benthic primary producers to resources, energy, and environmental stress across spatial scales. These metrics will be combined with a newly developed index for quantifying local-scale variation in upwelling intensity to characterize the linkages between climate forcing and ecosystem state. Coupling oceanography with our field and laboratory experiments will provide unique and valuable insights into how the current state of rocky intertidal ecosystems is likely to be altered in the future.

Intellectual Merit. The project will contribute one of the first studies to test the community consequences of varying upwelling and CO2 across an ecosystem scale. How these factors alter the direct and indirect interactions of key species is of fundamental importance in our efforts to learn how field ecosystems will respond to climate change. Such knowledge is crucial to our efforts to manage and conserve marine communities facing human-induced variation in climate.



[ table of contents | back to top ]

Funding

Funding SourceAward
NSF Division of Ocean Sciences (NSF OCE)
NSF Division of Ocean Sciences (NSF OCE)
NSF Division of Ocean Sciences (NSF OCE)

[ table of contents | back to top ]

This document is created by info v 4.1f 5 Oct 2018 from the content of the BCO-DMO metadata database.    2021-04-10  15:11:04