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strmalgi
Stream Algal Abundances
Diane
McKnight
diane.mcknight@colorado.edu
https://orcid.org/0000-0002-4171-1533
McMurdo Dry Valleys LTER
http://mcmlter.org/
2015-01-21
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 abundance and species distribution of algal mats in glacial meltwater streams of the region. This table contains data showing the percent of total biomass (abundance) represented by algal type (brown, red, orange or green), phylum, species and morphotype for multiple streams, dates, and replications.
abundance
algae
morphotype
phylum
stream
Station Keywords
population dynamics
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/stream-algal-abundances
Transect by Andersen Creek near Gage Moss Site M-01, H01Simm-G, H1 Transect 1 Points T011 and T012 mark the start and end of the transect. Start : IDs: 1ANDRSNT011 Ellipsoid: 23.73 ORTHOMETRIC HT (m) 78.97 End: ID: 1ANDRSNT012 Ellipsoid: 22.64 ORTHOMETRIC HT (m) 77.88 File provenance: strm-clg.txt
162.906311035156
162.907409667969
-77.622917175293
-77.622985839844
78
78
meter
Transect by Canada Stream near Gage Moss Site M-03, F04Cana-G Transect 3 Points T031 and T032 mark the start and end of the transect. Start : IDs: 3CNGAGET031 Ellipsoid: 0.22 ORTHOMETRIC HT (m) 55.46 End: ID: 3CNGAGET032 Ellipsoid: -2.37 ORTHOMETRIC HT (m) 52.85 File provenance: strm-clg.txt
163.050796508789
163.052688598633
-77.613243103027
-77.613395690918
54
54
meter
Transect by Canada Stream at Delta Moss Site M-04, F04Cana-D Transect 4 Points T041 and T042 mark the start and end of the transect. Start : IDs: 4CNDELTAT041 Ellipsoid: -30.52 ORTHOMETRIC HT (m) 24.72 End: ID: 4CNDELTAT042 Ellipsoid: -31.83 ORTHOMETRIC HT (m) 23.39 File provenance: strm-clg.txt
163.069854736328
163.070114135742
-77.614593505859
-77.614814758301
24
24
meter
Transect by Von Guerard Stream at Upper Site Moss Site M-05 Transect 5 Points T051 and T052 mark the start and end of the transect. Start : IDs: 5VGUPPERT051 Ellipsoid: 114.08 ORTHOMETRIC HT (m) 169.27 End: ID: 5VGUPPERT052 Ellipsoid: 120.24 ORTHOMETRIC HT (m) 175.41 File provenance: strm-clg.txt
163.305282592773
163.307327270508
-77.634208679199
-77.634559631348
172
172
meter
Transect by Von Guerard Stream at Lower Site Moss Site M-06 Transect 6 Points T061 and T062 mark the start and end of the transect. Start : IDs: 6VGLOWERT061 Ellipsoid: 33.99 ORTHOMETRIC HT (m) 89.19 End: ID: 6VGLOWERT062 Ellipsoid: 33.74 ORTHOMETRIC HT (m) 88.92 File provenance: strm-clg.txt
163.287460327148
163.288482666016
-77.619300842285
-77.619659423828
89
89
meter
Transect by Delta Stream at Upper Site Moss Site M-07, F08Delt-U Transect 7 Points T071 and T072 mark the start and end of the transect. Start : IDs: 7DLTUPPERT071 Ellipsoid: 201.5 ORTHOMETRIC HT (m) 256.72 End: ID: 7DLTPPERT072 Ellipsoid: 201.53 ORTHOMETRIC HT (m) 256.73 File provenance: strm-clg.txt
163.097671508789
163.099685668945
-77.652854919434
-77.653213500977
256
256
meter
Transect by Delta Stream at gage Moss Site M-08, F08Delt-G Transect 8 Points T081 and T082 mark the start and end of the transect. Start : IDs: 8DLTGAGET081, Ellipsoid: -23.45 ORTHOMETRIC HT (m) 31.78 End: ID: 8DLTGAGET082 Ellipsoid: -19.93 ORTHOMETRIC HT (m) 35.28 File provenance: strm-clg.txt
163.108413696289
163.110809326172
-77.625495910645
-77.625877380371
33
33
meter
Transect by green Creek above gage Moss Site M-09, F09Green-G Transect 9 Points T091 and T092 mark the start and end of the transect. Start : IDs: 9GREENT091, Ellipsoid: -22.66 ORTHOMETRIC HT (m) 32.58 End: ID: 9GREENT092 Ellipsoid: -26.5 ORTHOMETRIC HT (m) 28.72 File provenance: strm-clg.txt
163.058395385742
163.059310913086
-77.623992919922
-77.624420166016
30
30
meter
Transect by Bowles Creek near gage Moss Site M-10, F10Bowl-G Transect 10 Points T101 and T102 mark the start and end of the transect. Start : IDs: 10BOWLEST101, Ellipsoid: -25.54 ORTHOMETRIC HT (m) 29.7 End: ID: 10BOWLEST102 Ellipsoid: -24.01 ORTHOMETRIC HT (m) 31.24 File provenance: strm-clg.txt
163.057083129883
163.057601928711
-77.623100280762
-77.623336791992
30
30
meter
Transect by Huey Creek near gage Moss Site M-11, F11Huey-G Transect 11 Points T111 and T112 mark the start and end of the transect. Start : IDs: 10BOWLEST111, Ellipsoid: -14.09 ORTHOMETRIC HT (m) 41.15 End: ID: 10BOWLEST112 Ellipsoid: -12.91 ORTHOMETRIC HT (m) 42.31 File provenance: strm-clg.txt
163.121688842773
163.122741699219
-77.601676940918
-77.602165222168
42
42
meter
Transect by Von Guerard Stream at gage Moss Site M-12, F12Vong-G Transect 12 Points T121 and T122 mark the start and end of the transect. Start : IDs: 12VGGAGET121, Ellipsoid: -30.67 ORTHOMETRIC HT (m) 24.53 End: ID: 12VGGAGET122 Ellipsoid: -31.35 ORTHOMETRIC HT (m) 23.87 File provenance: strm-clg.txt
163.253005981445
163.255294799805
-77.609222412109
-77.609474182129
24
24
meter
Moss Site 13 Transect 13 Points T131 and T132 mark the start and end of the transect. Start : IDs: 13PRISCUT131, Ellipsoid: 16.79 ORTHOMETRIC HT (m) 71.96 End: ID: 13PRISCUT132 Ellipsoid: 21.49 ORTHOMETRIC HT (m) 76.64 File provenance: strm-clg.txt
162.537292480469
162.539794921875
-77.696228027344
-77.696861267090
76
76
meter
Transect by Lawson creek near gage Moss Site M-14, B14Laws-G Transect 14 Points T141 and T142 mark the start and end of the transect. Start : IDs: 14LAWSONT141, Ellipsoid: 24.08 ORTHOMETRIC HT (m) 79.13 End: ID: 14LAWSONT144 Ellipsoid: 30.05 ORTHOMETRIC HT (m) 85.08 File provenance: strm-clg.txt
162.266586303711
162.268783569336
-77.720359802246
-77.720619201660
83
83
meter
Transect by Boehner Stream at lower site. B15Bohn-L Transect 15 Points T151 and T152 mark the start and end of the transect. Start : IDs: 15BOHNERT151 Ellipsoid: 74.57 ORTHOMETRIC HT (m) 129.74 End: ID: 15BOHNERT152 Ellipsoid: 70.17 ORTHOMETRIC HT (m) 125.32 File provenance: strm-clg.txt
162.559936523438
162.563919067383
-77.696968078613
-77.697700500488
185
185
meter
Transect by Wharton Creek at Delta Moss Site M-16 Transect 16 Points T161 and T162 mark the start and end of the transect. Start : IDs: 16WHARTONT161 Ellipsoid: 24.1 ORTHOMETRIC HT (m) 79.31 End: ID: 16WHARTONT162 Ellipsoid: 23.61 ORTHOMETRIC HT (m) 78.82 File provenance: strm-clg.txt
162.745101928711
162.746231079102
-77.644943237305
-77.645057678223
79
79
meter
1994-01-01
1994-12-31
Data from this table was initially included in the raw data files specified under the variable for 'file name'. These are Microsoft Excel version 6.0 files. Once submitted to INSTAAR, the data manager combined all of the stream biology files that included variables for "abundance", and removed any variables that had no direct influence on the total biomass (abundance) of a given algal type, phylum, species, and morphotype. The resulting table is represented in the "strmalgi.dat" (ascii comma delimited format) and "strmalgi.txt" (MS-DOS text - table layout) files used on the web page. In November, 1999, the data manager added a field for stream transect ID code. This assisted in preparing the data for use in Oracle and ArcInfo. In July, 2000, the dataset code field was added in order to simplify generating links between different data and metadata fields.
McMurdo Dry Valleys LTER
http://mcmlter.org/
McMurdo Dry Valleys LTER
http://mcmlter.org/
McMurdo Dry Valleys LTER
Within each transect, algal mats were visually identified as either orange, red, black, or green. Not all types of algal mats were found within every transect. A maximum of five algal samples of each color were collected from each transect using a #13 cork borer (diameter = 17 mm, area = 227 mm2). Algal samples were preserved in 10% formalin for laboratory identifications. In all, 141 algal samples were collected from 12 streams. Preserved algal samples were examined in the laboratory to determine species composition and relative abundance using a Nikon Diaphot phase contrast microscope. Samples were well mixed to attain an even (random) sampling of mat (some small "clumps" of algae were still present, but these did not affect the objectives of the study), and then subsamples of 2 ml were withdrawn. Each subsample was placed in a 2-ml settling chamber with a 26 mm diameter and examined at x400 magnification. To get a representative count of relative species abundance, seven random fields (a total of 0.44 mm2) needed to be examined per subsample. Within each field, algae were identified to genus and species where possible (excluding diatoms, which were counted but not identified.) Percent cover was determined in each field by measuring the length and width of all specimens using an ocular micrometer. Cell "depth" was also measured in order to estimate biovolume. All seven fields were then tallied, and the percentage of the total algal biomass was determined for each taxa. Taxonomic identifications were primarily based on the classical Antarctic literature.
strmalgi
strmalgi.csv
634287
1
0
\r\n
column
,
"
https://mcm.lternet.edu/sites/default/files/data/strmalgi.csv
Strmtrnsid
Strmtrnsid
Code representing stream transect
string
Code representing stream transect
Location
Location
Stream location / name of transect in which measurements were made
string
Stream location / name of transect in which measurements were made
DATE_TIME
Date
Date of sample
date
mm/dd/yyyy
Algae Type
Algae Type
Type of algae species is associated with (red, black, green or orange)
string
Type of algae species is associated with (red, black, green or orange)
Replication
Replicate#
Replication number of sample
string
Replication number of sample
Transect
Transect
Transect ID for sample
string
Transect ID for sample
Phylum
Phylum
Algal phylum
string
Algal phylum
Species
Species
Algal species
string
Algal species
Morphotype
Morphotype
Morphotype of species
string
Morphotype of species
Abundance
Abundance
Percent of total biomass represented by algae type, phylum, species, morphotype
dimensionless
0.1
real
0
100
Required entry
None given
File name
File name
Original file name in which this information was submitted
string
Original file name in which this information was submitted