Diane M. McKnight 2015-01-22 tabular digitial data McMurdo Dry Valleys LTER McMurdo Dry Valleys LTER 10.6073/pasta/ef28568ec4a75f88d1bbed2a245d5e63 https://mcm.lternet.edu/content/algal-species-morphotype-descriptions 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. ground condition 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. As needed LTER Core Areas population dynamics None <cntorg>McMurdo Dry Valleys LTER</cntorg> <onlink>http://mcmlter.org/</onlink> <span property="dc:title" content="McMurdo Dry Valleys LTER" class="rdf-meta element-hidden"></span> Not Applicable Not Applicable Field and/or Lab Methods 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. 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. unknown mrphtype Dataset code Code representing algal species, morphotype description dataset The data provider Code representing algal species, morphotype description dataset Family Algae Phylum The data provider Algae Phylum Species genus, species The data provider genus, species Morphotype Letter assigned for species with characteristics summarized in description The data provider Letter assigned for species with characteristics summarized in description Description Physical characteristics of species, morphotype The data provider Physical characteristics of species, morphotype File name Original file name in which this information was submitted The data provider Original file name in which this information was submitted McMurdo Dry Valleys LTER The data distributor shall not be liable for innacuracies in the content http 1 0 \n 1 column , https://mcm.lternet.edu/sites/default/files/mrphtype.csv None 2015-01-22 2015-01-22 McMurdo Dry Valleys LTER http://mcmlter.org/ Biological Data Profile of the Content Standards for Digital Geospatial Metadata devised by the Federal Geographic Data Committee. Drupal Ecological information Management Systems, version D7, Biological Data Profile module