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STRM_MICROBIAL_BIOMASS
Algal microbial mat biomass measurements from the McMurdo Dry Valleys and Cape Royds, Antarctica (1994-2019, ongoing)
Diane
McKnight
diane.mcknight@colorado.edu
https://orcid.org/0000-0002-4171-1533
McMurdo Dry Valleys LTER
http://mcmlter.org/
Joshua
Darling
joshua.darling@colorado.edu
https://orcid.org/0000-0001-9074-4617
field technician
Nick
Schulte
Nicholas.Schulte@colorado.edu
field technician
Renée
Brown
rfbrown@unm.edu
https://orcid.org/0000-0002-4986-7663
data manager
Tyler
Kohler
tyler.j.kohler@gmail.com
https://orcid.org/0000-0001-5137-4844
associated researcher
Breana
Simmons
bsimmons@ega.edu
associated researcher
2019-10-08
English
As part of the Long Term Ecological Research (LTER) project in the McMurdo Dry Valleys of Antarctica, a systematic sampling program has been undertaken to monitor the glacial meltwater streams in that region. This dataset contains microbial biomass concentrations found in algal mats located in streams throughout the McMurdo Dry Valleys as well as in ponds of the nearby Cape Royds. Microbial mat biomass has been collected as part of the McMurdo LTER since the 1993-1994 field season and measured as ash-free dry mass (AFDM) and chlorophyll-a (Chl-a).
algae
biomass
chlorophyll
chlorophyll a
microbial biomass
ponds
stream ecology
streams
LTER Controlled Vocabulary
algae
Antarctic desert streams
Antarctica
ash free dry mass
biomass
chlorophyll
mass
McMurdo Dry Valleys
microbial biomass
microbial mat
Station Keywords
primary production
LTER Core Areas
Data Policies
This data package is released under the Creative Commons Attribution 4.0 International License (CC BY 4.0; http://creativecommons.org/licenses/by/4.0/), which allows consumers (hereinafter referred to as “Data Users”) to freely reuse, redistribute, transform, or build on this work (even commercially) so long as appropriate credit is provided. Accordingly, Data Users are required to properly cite this data package in any publications or in the metadata of any derived products that result from its use (in whole or in part). A recommended citation is provided on the summary metadata page associated with this data package in the McMurdo Dry Valleys LTER Data Catalog (https://mcmlter.org/data), and a generic citation may be found on the summary metadata page in the repository where this data package was obtained. When these data contribute significantly to the contents of a publication, Data Users must also acknowledge that data were provided by the NSF-supported McMurdo Dry Valleys Long Term Ecological Research program (OPP-1637708). This data package has been released in the spirit of open scientific collaboration. Hence, Data Users are strongly encouraged to consider consultation, collaboration, and/or co-authorship (as appropriate) with the data package creator(s). Data Users should be aware these data may be actively used by others for ongoing research; thus, coordination may be necessary to prevent duplicate publication. Data Users should also recognize that misinterpretation of data may occur if they are used outside the context of the original study. Hence, Data Users are urged to contact the data package creator(s) if they have any questions regarding methodology or results. While substantial efforts are made to ensure the accuracy of this data package (with all its components), complete accuracy cannot be guaranteed. Periodic updates to this data package may occur, and it is the responsibility of Data Users to check for new versions. This data package is made available “as is” and comes with no warranty of accuracy or fitness for use. The creator(s) of this data package and the repository where these data were obtained shall not be liable for any damages resulting from misinterpretation, use, or misuse of these data. Finally, as a professional courtesy, we kindly request Data Users notify the primary contact referenced in the metadata when these data are used in the production of any derivative work or publication. Notification should include an explanation of how the data were used, along with a digital copy of the derived product(s). Thank you.
https://mcm.lternet.edu/content/algal-microbial-mat-biomass-measurements-mcmurdo-dry-valleys-and-cape-royds-antarctica-1994
1994-01-07
2019-01-17
The original iterations of the 'stream microbial biomass' data file were created by Tyler Kohler, Lee Stanish and Diane McKnight, and submitted to Inigo San Gil (the data manager) at the Institute of Arctic and Alpine Research (INSTAAR). For proper standardization in the database, the data was massaged into the fields strmgageid, collection date, etc. Entered in the database using Toad 4 Oracle from Dell inc (formerly own by Quest inc.)
McMurdo Dry Valleys LTER
Information Manager
im@mcmlter.org
McMurdo Dry Valleys LTER
http://mcmlter.org/
McMurdo Dry Valleys LTER
Algal mats were sampled along transects established by the MCMLTER in early to mid-January as in Alger et al. (1997), and mats were identified as either orange, black, green or red in color. Mats were collected using a brass cork borer (1.7 cm diameter) and placed into Whirlpack® bags containing stream water. In the laboratory, samples were de-watered on pre-combusted Whatman GF/C filters, wrapped in foil, and stored at -20°C. Prior to the year 2000, Chl-a samples were extracted in buffered acetone and analyzed spectrophotometrically using the trichromatic method. After 2000, Chl-a was extracted in buffered acetone and analyzed using a Turner Designs 10-AU field fluorometer. Both methods have been shown to produce comparable Chl-a results (Lorenzen and Jeffrey 1980). For AFDM analysis, samples were dried at 100°C for 24 h, weighed, burned at 450°C for 4 h and re-weighed, and then re-wetted and dried to determine mass loss due to hydration of sediments. Both Chl-a and AFDM analyses were performed at Crary Laboratory in McMurdo Station.
STREAMS_MICROBIAL_BIOMASS
STREAMS_MICROBIAL_BIOMASS.csv
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https://mcm.lternet.edu/sites/default/files/data/STREAMS_MICROBIAL_BIOMASS_3.csv
DATASET_CODE
Dataset code
Code representing the data Object
string
Code representing the data Object
STRMTRNSID
Stream Transect ID
Code representing stream transect identifier. Represents where sampling was conducted
string
Code representing stream transect identifier. Represents where sampling was conducted
STREAM NAME
Stream Name
The name of the stream where sampling occurred
string
The name of the stream where sampling occurred
SAMPLE NAME
Sample Name
A name that serves to identify the sample. This encodes the replicate number.
string
A name that serves to identify the sample. This encodes the replicate number.
DATE_TIME
Date Time
Date/time of sample (McMurdo time)
date
MM/DD/YYYY hh24:mm
AFDM (mg/cm2)
Ash Free Dry Mass (milligrams per sq. centimeter)
Ash Free Dry Mass in milligrams per square cm
milligramsPerSquareCentimeter
0.01
real
Null
None given
Chl-A (ug/cm2)
Chlorophyl-A (ug/cm2)
Chlorophyl-A density (concentration)
microgramsPerSquareCentimeter
0.01
real
Null
None given
MAT TYPE
Mat Type
Type of mat, by pigmentation or substrate
string
Type of mat, by pigmentation or substrate
SEASON
Season
the season the study was conducted, as a year
date
YYYY
COMMENTS
Comments
Remarkable comments
string
Remarkable comments