uid=ARC,o=lter,dc=ecoinformatics,dc=org all public read 2012_GS_ITEX_PercentCover.04 Arctic LTER Program Gaius Shaver

Ecosystems Center at the Marine Biological Laboratory 7 MBL Street Woods Hole MA 02543 United States

Arctic LTER Program

The Ecosystems Center Marine Biological Lab 7 MBL St Woods Hole MA 02543 USA

(508) 289 7496 arc_im@mbl.edu http://ecosystems.mbl.edu/ARC/ Edward Rastetter

Ecosystems Center at the Marine Biological Laboratory 7 MBL Street Woods Hole MA 02543 United States

Associated Researcher Mathew Williams

University of Edinburgh School of Geosciences Darwin Building Edinburgh EH9 EJU United Kingdom

Associated Researcher James Laundre

Ecosystems Center at the Marine Biological Laboratory 7 MBL Street Woods Hole MA 02543 United States

Data Manager Laura van der Pol

Ecosystems Center at the Marine Biological Laboratory 7 MBL Street Woods Hole MA 02543 United States

Field Crew 2013 Total and individual subsample species percent cover data for all plots where flux or point frame measurements were made in 2012 IVO the LTER Shrub vegetation plots at Toolik Field Station. All plots sampled were dominated either by B. nana or S. pulchra canopies. Cover estimates were made for the five most dominate functional groups using a 1m x 1m grid with 20cm2 blocks with each square representing four percent of the total area. Percentages represent absolute cover so do not sum to 100%. photosynthesis shrub canopy species percent cover flux measurement point frame Acceptance and utilization of LTER data requires that: The Principal Investigator be sent a notice stating reasons for acquiring any data and a description of the publication intentions. The Principal Investigator of the data set be sent a copy of the report or manuscript prior to submission and be adequately cited in any resultant publications A copy of any resultant publications should be sent to: Principal Investigator Ecosystems Center Marine Biological Laboratory Woods Hole, MA 02543 http://ecosystems.mbl.edu/ARC/meta_template.php?FileName=./terrest/tracegas/xlsfiles/2012_GS_ITEX_PercentCover.html Upland site; co-located in Block 1 of the Shrub LTER sites; IVO 68° 38'18.8" N, 149° 34' 07.2" W +/- 50m. Except for plots marked "FERT", plots are outside of the designated LTER treatments, though are exposed to the same environmental conditions. All plots were chosen by the dominant shrub canopy (either Salix pulchraor Betula nana) and preferentially selected to be 90cm+ in height. -149.568666666666 -149.568666666666 68.6385555555555 68.6385555555555 Outlet site; co-located in Block 2 of the Shrub LTER sites; IVO 68° 38'008.1" N, 149° 35' 017.1" W +/- 50m. Except for plots marked "FERT", plots are outside of the designated LTER treatments, though are exposed to the same environmental conditions. All plots were chosen by the dominant shrub canopy (either Salix pulchraor Betula nana) and preferentially selected to be 90cm+ in height. -149.588083333333 -149.588083333333 68.6355833333333 68.6355833333333 2012-06-23 2012-08-07 Organisms Studied Genus Betula Species nana Genus Salix Species pulchra Genus Salix Species glauca This was a season-long project, though it followed similar methods to ITEX projects performed starting in 2003 that are likely to be replicated in the future for reasearch at the Toolik Field Station, AK. Version 2: Missing values changed to #N/A. CH 28Jan2013 Version 3: Updated metadata to newer version (with sites sheet). CH April 2013. Version 4: Corrected eml excel file name wrong extension. JimL 16May13 Data Manager

The Ecosystems Center Marine Biological Lab 7 MBL St Woods Hole MA 02543 USA

(508) 289 7496 arc_im@mbl.edu http://ecosystems.mbl.edu/ARC/ ARC LTER

The Ecosystems Center Marine Biological Lab 7 MBL St Woods Hole MA 02543 USA

(508) 289 7496 arc_im@mbl.edu http://ecosystems.mbl.edu/ARC/ PERCENT COVER METHOD Total and individual subsample species percent cover data for all plots where flux or point frame measurements were made in 2012 IVO the LTER Shrub vegetation plots at Toolik Field Station. All plots sampled were dominated either by B. nana or S. pulchra canopies. Locations were preferentially chosen to represent tall shrub canopies (height > 70 cm) and to avoid the edge of vegetation stands or locations where the canopy appeared unhealthy, trampled, or patchy. We split the 1m x 1m plots into 25 sub plots using a grid, then estimated percent cover of the five most common functional groups/species in each of the sub plots individually and then summed the percentage from each plot (representing 4% total cover) to obtain the total cover by functional group/species. For each measurement, at least two field technicians performed the estimates by species; the value recorded was the average of the two (or more) estimates. The total vascular plant cover for the entire plot is the sum of all species cover percentages; the total plant cover is the vascular plant cover plus moss cover. Percentages represent absolute cover, and thus they do not sum to 100% Each spp is assigned a 6 letter code; the first 3 letters of genus and species name. SPP indicates the species is not known. Where many graminoids were growing together it was often impossible to judge the individual percentages, so only the total for the growth form is given; the main species present are listed in the notes column. The species or functional groups identified in the 1m x 1m point frame and chamber flux plots are are coded to match those collected by ITEX harvest plots from 2003 - 2009 as defined here: SPECIES | CODE | FUNCTIONAL GROUP | COMMENTS Betula nana | BET NAN | D | Forb | FORB | F | Grass or sedge - unidentified | GRAMMINOID | GRM | Ledum palustre | LED PAL | E | Moss - unidentified |MOSS |B | Pedicularis species | PED SPP | F | Potentilla species | POT SPP | F | Salix glauca | SAL GLA | D | Salix pulchra | SAL PUL |D | Salix reticulata | SAL RET | D |net veined willow Vaccinium vitis-ideae |VAC VIT |E | Vaccinium uliginosum | VAC ULI | D | bog blueberry Growth forms (functional groups) are abbreviated as follows: D = deciduous shrub E = evergreen shrub F = forb GRM = graminoid or sedge B = bryophyte (mosses and liverworts) #N/A refers to a value that was not recorded. pers-1 Gus Shaver

The Ecosystems Center Marine Biological Lab 7 MBL St Woods Hole MA 02543 USA

(508) 289 7496 gshaver@mbl.edu Lead PI Jim Laundre

The Ecosystems Center Marine Biological Lab 7 MBL St Woods Hole MA 02543 USA

(508) 289 7496 arc_imr@mbl.edu Information Manager The goal of Arctic LTER project is to predict the future ecological characteristics of the site based upon our knowledge of the controls of ecosystem structure and function as exerted by physical setting and geologic factors, climatic factors, biotic factors, and the changes in fluxes of water and materials from land to water. To achieve this goal the Arctic LTER uses several approaches: Long-term monitoring and surveys of natural variation of ecosystem characteristics in space and time. Includes: climate, plant communities and productivity, thaw depth, stream flow, chemistry of streams and lakes, temperatures of streams and lakes, lake chlorophyll lake productivity, zooplankton abundance. Experimental manipulation of ecosystems for years and decades. Includes: tundra warming, shading, and fertilizing, grazer exclusions, fertilization of lakes and streams, addition and subtraction of predators. Synthesis of results and predictive modeling at ecosystem and watershed scales. Includes: stream N cycling, lake physics, bioenergetics of fish populations, water movement and transfer of DOC and nutrients from land to water, soil respiration, cycling and storage of C in tundra under different scenarios of future climates. This material is based upon work supported by the National Science Foundation under Grants #DEB-981022, 9211775, 8702328; #OPP-9911278, 9911681, 9732281, 9615411, 9615563, 9615942, 9615949, 9400722, 9415411, 9318529; #BSR 9019055, 8806635, 8507493. Any opinions, findings, conclusions, or recommendations expressed in the material are those of the author(s) and do not necessarily reflect the views of the National Science Foundation. The Arctic LTER research site (68°N and 149°W) is in the foothills region of the North Slope of Alaska and includes the entire Toolik Lake watershed and the adjacent watershed of the upper Kuparuk River, down to the confluence of these two watersheds. This area is typical of the northern foothills of the Brooks Range, with continuous permafrost, no trees, a complete snow cover for 7 to 9 months, winter ice cover on lakes, streams, and ocean, and cessation of river flow during the winter. Tussock tundra vegetation of sedges and grasses mixed with dwarf birch and low willows form the dominant vegetation type with areas of drier heath tundra on ridge tops and other well-drained sites as well as areas of river-bottom willow communities. -149.75 -149.0433 68.8 68.5 610 1360 meter 2012_GS_ITEX_PercentCover.csv Percent species cover from 14 flux canopy and 19 point frame 1m x 1m plots sampled near the shrub LTER sites at Toolik Field Station, Alaska, summer 2012. 2012_GS_ITEX_PercentCover.csv 1 \r\n column , " http://metacat.lternet.edu/das/dataAccessServlet?docid=knb-lter-arc.10148&urlTail=terrest/tracegas/data/2012_GS_ITEX_PercentCover.csv YEAR YEAR year of measurement yyyy DATE DATE date of measurement dd-mon-yy SITE SITE Toolik Toolik GROUP GROUP Measurement location in relation to Toolik Lake LTER Shrub plots; In vicinity of Block1 = Upland, IVO Block 2 = Outlet Measurement location in relation to Toolik Lake LTER Shrub plots; In vicinity of Block1 = Upland, IVO Block 2 = Outlet PLOT PLOT Individual plot identifier Individual plot identifier TREAT TREAT none or fertilized (FERT - Fertilized with 10g N + 5g P per square meter. N is in form of NH4NO3 annually) none or fertilized (FERT - Fertilized with 10g N + 5g P per square meter. N is in form of NH4NO3 annually) PHASE PHASE Measurement series (round of measurement within each year) #not used in this data collection number real PLOT SIZE PLOT SIZE 1m x 1m chamber or point frame size 1m x 1m chamber or point frame size SPECIES CODE SPECIES CODE species abbreviation species abbreviation #N/A Missing or Not Measured FUNCT GROUP FUNCT GROUP functional group classification functional group classification #N/A Missing or Not Measured SPP PERCENT COVER SPP PERCENT COVER percent cover of specific species percent real #N/A Missing or Not Measured DOM VEG DOM VEG Dominant canopy vegetation Dominant canopy vegetation #N/A Missing or Not Measured Total vascular plant cover percent cover Total vascular plant cover percent cover percent vascular plant cover (sum ofall SPP except moss) for the plot percent real #N/A Missing or Not Measured Total plant cover Total plant cover total plant percent cover (including moss) for the plot percent real #N/A Missing or Not Measured 163 2012_GS_ITEX_PercentCover.xlsx An excel file that has worksheets with the metadata and data. 2012_GS_ITEX_PercentCover.xlsx Microsoft Excel http://metacat.lternet.edu/das/dataAccessServlet?docid=knb-lter-arc.10148&urlTail=terrest/tracegas/xlsfiles/2012_GS_ITEX_PercentCover.xlsx Microsoft Excel file ratio of two quantities as percent composition (1:100)