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