LIMNO_PHYTO_PROFILE English utf8 dataset McMurdo Dry Valleys LTER Information Manager im@mcmlter.org pointOfContact 2019-10-18 ISO 19115-2 Geographic Information - North American Profile Metadata - Data with Biological Extensions ISO 19115-2:2009(E) Phytoplankton water column profiles in Lake Bonney, Antarctica from 2004 to 2015 2019-10-18 publication Jeff Patriarche Montana State University http://www.montana.edu/ 334 Leon Johnson Hall Bozeman MT 59717 US j.patriarche@gmail.com pointOfContact John Priscu Montana State University http://www.montana.edu/ jpriscu@montana.edu pointOfContact Cristina Takacs-Vesbach University of New Mexico https://www.unm.edu/ cvesbach@unm.edu http://www.vesbachlab.org pointOfContact Luke Winslow United States Geological Survey (USGS) https://www.usgs.gov/staff 608-821-3914 lwinslow@usgs.gov http://cida.usgs.gov/people/lwinslow.html pointOfContact Krista Myers Louisiana State University http://lsu.edu pointOfContact Heather Buelow University of New Mexico https://www.unm.edu/ University of New Mexico Albuquerque NM 87131 US hnbuelow@gmail.com https://scholar.google.com/citations?user=Ut_MuNcAAAAJ&hl=en pointOfContact Rachael Morgan-Kiss Miami University http://miamioh.edu/ morganr2@miamioh.edu https://photopsychrophile.weebly.com pointOfContact Peter Doran Louisiana State University http://lsu.edu pdoran@lsu.edu https://www.lsu.edu/science/geology/people/faculty/doran.php pointOfContact documentDigital Lake Bonney (McMurdo Dry Valleys, east Antarctica) represents a year-round refugia for life adapted to extreme conditions. Lake level has risen by more than 3 m since 2004, but impacts of rapid lake level rise on phytoplankton community structure is also poorly understood. From 2004 to 2015, in concert with the summer limnological samplings, an in situ submersible spectrofluorometer (bbe FluoroProbe) was used to profile phytoplankton throughout the water columns of east and west lobes Lake Bonney to quantify the vertical structure of four functional algal groups (green algae, brown/mixed algae, cryptophytes, cyanobacteria). Our findings showed that phytoplankton communities were differentially impacted by physical and chemical factors over long-term vs. seasonal time scales. Following a summer of rapid lake level rise (2010-11), an increase in depth integrated chlorophyll a (chl-a) occurred in Lake Bonney caused by stimulation of photoautotrophic green algae. Collectively our data reveal that phytoplankton groups possessing variable trophic abilities are differentially competitive during seasonal and long-term time scales owing to periods of higher nutrients (photoautotrophs) vs. light/energy limitation (mixotrophs). Name: Renée F. Brown Role: data manager completed McMurdo Dry Valleys LTER Information Manager im@mcmlter.org pointOfContact organic matter population dynamics theme LTER Core Areas English Lake Bonney is a saline lake with permanent ice cover at the western end of Taylor Valley in the McMurdo Dry Valleys of Victoria Land, Antarctica. It is 7 kilometres or 4.3 mi long and up to 900 metres or 3,000 ft wide. A narrow channel only 50 metres or 160 ft wide. Lake Bonney at Narrows separates the lake into East Lake Bonney 3.32 square kilometres or 1.28 sq mi and West Lake Bonney, 0.99 square kilometres or 0.38 sq mi. The west lobe is flanked by Taylor glacier. Valley: Taylor Distance to Sea : 25 Maximum Length (km): 4.8 Maximum Width (km): 0.9 Maximum Depth (m): 37 Surface Area (km^2): 3.32 Ice Thickness Average Surface (m): 3 - 4.5 Volume (m^3 * 10^6): 54.7 162.536209106445 162.353210449219 -77.724441528320 -77.697700500488 Lake Bonney is a saline lake with permanent ice cover at the western end of Taylor Valley in the McMurdo Dry Valleys of Victoria Land, Antarctica. It is 7 kilometres or 4.3 mi long and up to 900 metres or 3,000 ft wide. A narrow channel only 50 metres or 160 ft wide. Lake Bonney at Narrows separates the lake into East Lake Bonney 3.32 square kilometres or 1.28 sq mi and West Lake Bonney, 0.99 square kilometres or 0.38 sq mi. Valley: Taylor Distance to Sea : 28 Maximum Length (km): 2.6 Maximum Width (km): 0.9 Maximum Depth (m): 40 Surface Area (km^2): 0.99 Ice Thickness Average Surface (m): 2.8-4.5 Volume (m^3 * 10^6): 10.1 162.354934692383 162.269104003906 -77.727287292480 -77.714805603027 ground condition 2004-12-13 2015-01-16 https://mcm.lternet.edu/sites/default/files/data/LIMNO_PHYTO_PROFILE.csv LIMNO_PHYTO_PROFILE eng; US McMurdo Dry Valleys LTER LIMNO_PHYTO_PROFILE Number of Header Lines : 1 Orientation : Column Field Delimiter : , false DATASET_CODE Internal dataset code. SAMPLE_ID Sample identification code LOCATION_NAME Location of sample DATE_TIME Date sample was collected Date Time Format: MM/DD/YYYY DEPTH Depth sample was taken. CYANOBACTERIA Calculated concentration of Cyanobacteria at fluorescence value of 610 nm, measured as Chlorophyll-a. CRYPTOPHYTES Calculated concentration of Cryptophytes at fluorescence value of 570 nm, measured as Chlorophyll-a. BROWN_MIXED_ALGAE Calculated concentration of Brown/Mixed Algae at fluorescence value of 525 nm, measured as Chlorophyll-a. GREEN_ALGAE Calculated concentration of Green Algae at fluorescence value of 470 nm, measured as Chlorophyll-a. DBF https://mcm.lternet.edu/sites/default/files/data/LIMNO_PHYTO_PROFILE.csv dataset A submersible spectrofluorometer (bbe Moldaenke Fluoroprobe; Beutler et al., 2002; Li et al., 2019) was lowered through the water columns in Lake Bonney beginning in the 2004-2005 field season. This instrument employs five light emitting diodes (LEDs) calibrated to the known excitation spectra of light harvesting antennae pigments of the following specific algal groups: 470 nm = green algae; 525 = brown/mixed algae; 570 nm = cryptophytes; 610 nm = cyanobacteria. An additional LED excited at 370 nm to estimate colored dissolved organic matter (CDOM), which was used to correct chl-a fluorescence.  The Fluoroprobe collected data continuously as it was lowered through the water column at approximately 20 cm s-1 yielding measurements at ~10 cm depth intervals. Metadata Access Constraints: none Metadata Use Constraints: none annually McMurdo Dry Valleys LTER http://mcmlter.org/ pointOfContact