Dataset: Aleutian Islands Benthic Production: PAR

Name: PAR measurements from kelp forests and urchin barrens on the Aleutian Islands, Alaska from R/V Oceanus cruises OC1606A and OC1707A during 2016-2017
Published: 2019-11-19
Keywords: oceans

Cite This Dataset

Spatial Extent: N:53.38962 E:-179.30663 S:51.41008 W:177.60144

Temporal Extent: 2016-06-17 - 2017-07-23

Project:

Collaborative Research: Changes in ecosystem production and benthic biodiversity following the widespread loss of an ecosystem engineer (Kelp Forest Ecosystem Engineer Loss)

Principal Investigator:

Matthew Edwards (San Diego State University, SDSU)

Co-Principal Investigator:

Brenda Konar (University of Alaska Fairbanks, UAF)

BCO-DMO Data Manager:

Shannon Rauch (Woods Hole Oceanographic Institution, WHOI BCO-DMO)

Version:

Version Date:

2019-11-19

Restricted:

Validated:

Yes

Current State:

Final no updates expected

PAR measurements from kelp forests and urchin barrens on the Aleutian Islands, Alaska from R/V Oceanus cruises OC1606A and OC1707A during 2016-2017

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Description

Estimates of benthic primary production and respiration in kelp forests and urchin barrens in the Aleutian Archipelago, Alaska (Attu, Nizki, Kiska, Atka, Adak, Chuginadak, Tanaga, Amchitka, Yunaska, Unmak, and Unalaska).

Methods & Sampling

We deployed 3 benthic chambers in each of three habitats (kelp forests, urchin barrens, and transition zones) at each of 10 islands in the Aleutian Archipelago. Each chamber was equipped with a data logger for dissolved oxygen (PME Minidot) and light (Odyssey PAR) and were left on the benthos for 36 hours. These data are hourly totals for light irradiance data for each habitat type at each island.

Data were collected each minute while deployed. Data were ultimately summed for each hour. Data are presented in different tabs for each island.

Data Processing Description

We used MS Excel and R-Studio to summarize and QA the data.

BCO-DMO Processing:
- inserted latitude and longitude for each site;
- added column with date formatted as yyyymmdd for clarity;
- added date to Nizki site.

Data Files

File
PAR.csv (Comma Separated Values (.csv), 141.67 KB) MD5:1a69e54dde87fb175fac4e77407c2779 Primary data file for dataset ID 755883

More Information about this dataset

Funding Sources

Funding Source	Award Number
NSF Division of Ocean Sciences	OCE-1435194

Deployments

Deployment	Synonyms	Start Date	Platform	Investigator
OC1606A		2016-06-17	R/V Oceanus	Genoa Sullaway (Chief Scientist)	data info
OC1707A		2017-07-18	R/V Oceanus	Matthew Edwards (Chief Scientist)	data info

Instruments

Oxygen Sensor

Supplied Name: PME Minidot Oxygen loggers

Supplied Description:

Instrument Type

Generic Name: Oxygen Sensor

Acronym: Dissolved Oxygen Sensor

Generic Description:

An electronic device that measures the proportion of oxygen (O2) in the gas or liquid being analyzed

Photosynthetically Available Radiation Sensor

Supplied Name: Odyssey PAR Logger

Supplied Description:

Instrument Type

Generic Name: Photosynthetically Available Radiation Sensor

Acronym: PAR sensor

Community Identifier: http://vocab.nerc.ac.uk/collection/L05/current/122/

Generic Description:

A PAR sensor measures photosynthetically available (or active) radiation. The sensor measures photon flux density (photons per second per square meter) within the visible wavelength range (typically 400 to 700 nanometers). PAR gives an indication of the total energy available to plants for photosynthesis. This instrument name is used when specific type, make and model are not known.

Parameters

Date and time formats are described in python strftime() syntax.

Supplied Name	Supplied description	Supplied Units	Standard Name
Island	Island name	unitless	site
lat	Latitude of measurement; positive values = North	decimal degrees	lat
lon	Longitude of measurement; positive values = East	decimal degrees	lon
Date	Date; format: dd/mm/yyyy	unitless	date
Time	Time of day; 24-hr clock; format: HH:MM:SS	unitless	time
Sensor_num	Sensor number	unitless	instrument
Serial	Sensor serial number	unitless	instrument
Habitat	Habitat type	unitless	site_descrip
umol_photon_m2_hour	Irrandiance measurement	micromoles photons per square meter per hour (umol photons/m2/hr)	irradiance
Date_yyyymmdd	Date formatted as yyyymmdd	unitless	date

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Database

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Dataset: Aleutian Islands Benthic Production: PAR