English
utf8
dataset
McMurdo Dry Valleys LTER
http://mcmlter.org/
2015-01-22
ISO 19115-2 Geographic Information - North American Profile Metadata - Data with Biological Extensions
ISO 19115-2:2009(E)
Algal Species, Morphotype Descriptions
2015-01-22
publication
Diane McKnight
University of Colorado Boulder
http://www.colorado.edu/
diane.mcknight@colorado.edu
pointOfContact
documentDigital
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 descriptions of the morphotypes found for algal species belonging to the family Oscillatoriaceae. Morphotypes were based on physical characteristics.
completed
McMurdo Dry Valleys LTER
http://mcmlter.org/
unknown
Descriptions for each morphotype were submitted on paper copies to the data manager at INSTAAR in August, 1997. These were entered into Microsoft Excel and transferred to the McMurdo LTER database. The ascii text, comma delimited file which was exported from Access generated the 'mrphtype.dat' file used on the web page. In July, 2000, a field for dataset code was added. This would simplify generating links between different data and metadata fields and assist in making the data more relational / useful in Oracle.
population dynamics
theme
LTER Core Areas
English
https://mcm.lternet.edu/sites/default/files/mrphtype.csv
mrphtype
eng; US
McMurdo Dry Valleys LTER
mrphtype
Record Delimiter : \n Number of Header Lines : 1 Number of Footer Lines : 0 Orientation : Column Quote Character :
"Field Delimiter : ,
false
Dataset code
Code representing algal species, morphotype description dataset
Family
Algae Phylum
Species
genus, species
Morphotype
Letter assigned for species with characteristics summarized in description
Description
Physical characteristics of species, morphotype
File name
Original file name in which this information was submitted
DBF
https://mcm.lternet.edu/sites/default/files/mrphtype.csv
dataset
In all, over thirty taxa of algae were identified in Taylor Valley streams. To allow for finer distinctions to be made concerning physical characteristics, species belonging to the family Oscillatoriaceae were divided into thirteen distinct morphotypes. These morphotypes were defined based on the following characteristics: trichome width, cell length, presence or absence of a calyptra (thickened membrane on the terminal cell, occurrence or otherwise of numerous trichomes within a common sheath, and shape of the apical cell. Each morphotype was then assigned to the species that most closely matched its description. In many cases, more than one morphotype was assigned to a single species. Morphotype L consisted of trichomes less than 2.5 micrometers in width, making them very difficult to distinguish at x400 magnification. As a result, two species of Oscillatoriales (Phormidium frigidum and Oscillatoria deflexa) were assigned to this particular morphotype.
Metadata Access Constraints: none Metadata Use Constraints: none
annually
McMurdo Dry Valleys LTER
http://mcmlter.org/
pointOfContact