TITLE. Toolik Lake grid point quadrat measurements: 1990 and 1996 Plant species composition, canopy structure, and microtopography data. ABSTRACT. Permanent 1-m^2 plots were established beside each of 90 out of the 100 Toolik Lake grid stakes in 1990. The grid points are spaced 100 meters apart. Plots are numbered according to row and column, beginning with 11 at the southwest corner of the grid. Plot 109 is located at the northeast corner of the grid. Each plot was located within 2 m of the grid stake, but always in the same vegetation type as that associated with the stake. The distance and direction from them were randomly selected, and thus varied from plot to plot. Point quadrat measurements are to be made every 5 years to quantify species composition, canopy structure, and microtopography. The point-quadrat technique used was identical to that described by Auerbach (1992): The point-quadrat method was used for estimating canopy stratification and plant cover. Aluminum point-quadrat frames were 1-m^2 in size, with double-layer filament spaced 10 cm apart to make a 10 x 10 cm grid for a total of 100 sample points per plot. Before sampling, the point-quadrat frame was leveled and plots were permanently marked in the following manner. Aluminum tags were nailed into the ground so that a frame could be repositioned in the same location from year to year; i.e., tags with a hole in the middle were used to define the locations for the point frame legs and four tags with a "X" stamped on them (positioned somewhere inside each of the frame corners) were used to define alignment of the frame by positioning the string crossings over these "X"s. Distances from the frame to a top canopy plant hit and to a surface layer plant hit were measured to the nearest 0.5 cm and recorded. Note that this measurement does not give canopy height from the ground, but from the point quadrat frame. Plant genus and species were also recorded at both hits at each point. CITATIONS. [1]Auerbach, N. 1992. Effects of road and dust disturbance in minerotrophic and acidic tundra ecosystems, Northern Alaska. MS thesis, University of Colorado, Boulder. 253 pp. PRINCIPAL INVESTIGATOR: Dr. Marilyn Walker Leader, Boreal Ecology Cooperative Research Unit USFS PNW Research Station and University of Alaska Fairbanks Boreal Ecology Cooperative Research Unit School of Agriculture and Land Resources Management P.O. Box 756780 University of Alaska Fairbanks Fairbanks, AK 99775-6780 Phone: 907-474-2424 Fax: 907-474-6251 E-mail: ffmdw@uaf.edu FUNDING SOURCE: National Science Foundation ARCTIC SYSTEM SCIENCE PROGRAM: Land-Atmosphere-Ice Interactions (LAII) and The International Tundra Experiment (ITEX) GRANT TITLE AND GRANT NUMBERS: Department of Energy Collaborative Research: Species Responses to Changes in Climate Across Arctic Gradients Using the North America ITEX Network (NATEX): Influences On Community and Ecosystem Processes 1989 - 1990: DOE-R4D 1994 - 1998: OPP-9400083 CONDITIONS FOR USE AND CITATION: For permission to use these data, contact the Principal Investigator. Grant numbers must be cited in any manuscripts resulting from these data. In addition, a copy of the manuscript must be sent to the PI. DATA SET OVERVIEW: This file contains plant species composition, canopy structure, and microtopography data for the point frame data collected at the Toolik Lake Grid from 1990 and 1996. The grid is part of the International Tundra Experiment network. The goal of this project is to assess potential changes in tundra plant communities in response to global climate change. This file can be used in conjunction with the Pointframe_species file to determine species names from the numeric species code found in this data file. TIME PERIOD COVERED BY DATA: 19900708 to 19960815 PHYSICAL LOCATION OF MEASUREMENT: Toolik Lake grid Alaska USA 393600E 7614800N (NW corner) 394600E 7613800N (SE corner) 68N 149W DATA COLLECTION AND PROCESSING: see abstract above DATA FORMAT: coma delimited FILE NAME: pointframe_toolik.csv SUMMARY OF VARIABLES FOR DATA: 1. POINT_ID: point identification number given to each point 2. YEAR: year of data collection (YYYY) 3. PLOT: plot number 4. X_COORDINATE: X coordinate of point frame grid (cm) 5. Y_COORDINATE: Y coordinate of point frame grid (cm) 6. Top_Secies: top hit species code 7. Top_Quality: top quality 8. Top_Condition: condition of top hit 9. Top_Woody: location of top hit 10. Bottom_Species: bottom hit species code 11. Bottom_Quality: bottom quality 12. Bottom_Condition: condition of bottom hit 13. Bottom_Woody: location of bottom hit DESCRIPTION OF SELECT VARIABLES: POINT_ID: point identification number given to each point *_Species: numeric species code given to the species hits. The file Pointframe_species.csv have the full species name represented by the number. *_Quality: Hit codes are 1 ("bulls eye" hit) and 0 (mediocre hit). A single "hit" was always defined as being both a top-layer hit and bottom- layer hit. *_Condition: Species condition codes are 1 (live), 2 (standing dead), 3 (dead), and 4 (other). Species condition code 4 was used for all non-vegetation hits (e.g., soil, litter, rock, bare). *_Woody: Woody (1) or non-woody (0) conditions were also recorded for each species. DOCUMENTATION AUTHOR: Original: Leanne Lestak 8 August 1994 Updated by: Jamie Hollingsworth 13 February 2002 PRINCIPAL FIELD WORKERS: Marilyn Walker, Nancy Auerbach and William Gould PUBLICATIONS WHICH INCLUDE THESE DATA: Walker, D.A. and N.C. Barry. 1991. Toolik Lake permanent vegetation plots: site factors, soil physical and chemical properties, plantspecies cover, photographs and soil descriptions. Joint Facility for Regional Ecosystem Analysis Data Report. 48 pp. + appendices. Ancillary metadata for each plot follows. The column headers are as follows. 1. Plot code 2. Sampling date 3. Field personnel #1 initials 4. Field personnel #2 initials 5. Corner A frame height 6. Corner B frame height 7. Corner C frame height 8. Corner D frame height 9. Corner A frame height in water 10. Corner B frame height in water 11. Corner C frame height in water 12. Corner D frame height in water 11,07/25/96,WAG,MAD,35.0,49.0,38.0,34.5 12,07/27/96,MAD,WAG,37.5,29.0,28.5,30.5 13,07/27/96,WAG,MAD,30.0,41.0,27.5,27.5 14,07/31/96,WAG,MDW,37.0,39.5,30.0,37.0 15,07/31/96,WAG,MDW,36.0,41.5,30.0,29.5 16,08/02/96,WAG,MDW,22.0,38.5,17.0,40.5 17,08/02/96,WAG,MDW,32.0,42.5,32.5,30.5 18,08/03/96,WAG,MDW,31.0,23.0,34.5,27.0 19,07/24/96,WAG,MDW,30.5,37.0,36.0,46.0 21,07/25/96,WAG,MAD,37.0,37.0,31.0,39.0 22,07/27/96,WAG,MAD,23.5,30.5,32.0,34.5 23,07/29/96,WAG,MDW,32.0,39.0,39.0,34.0 24,07/30/96,WAG,MAD,33.0,32.5,33.5,33.5 25,07/31/96,WAG,MDW,27.5,31.5,29.0,32.0 26,08/02/96,WAG,MDW,39.5,34.0,35.5,40.5 27,08/02/96,WAG,MDW,32.0,40.0,23.5,40.5 28,08/03/96,WAG,MDW,29.0,44.0,32.0,39.5 29,07/24/96,WAG,MDW,39.0,45.5,34.0,37.5 31,07/25/96,WAG,MAD,39.0,44.0,40.5,38.5 32,07/27/96,WAG,MAD,30.0,30.0,33.0,28.0 33,07/29/96,WAG,MDW,27.0,28.0,23.5,28.5 34,07/30/96,WAG,MAD,44.5,35.0,30.0,38.0 35,07/31/96,WAG,MDW,29.5,37.0,27.0,35.5 36,08/01/96,WAG,MDW,24.0,35.0,37.0,41.0 37,08/02/96,WAG,MDW,37.0,36.0,23.5,35.0 38,08/03/96,WAG,MDW,29.0,37.5,27.0,31.0 39,07/24/96,WAG,MDW,48.0,23.5,41.5,42.0 41,07/25/96,WAG,MAD,41.0,31.0,37.0,30.5 42,07/27/96,MAD,WAG,24.0,29.5,36.0,40.0 43,07/29/96,WAG,MDW,28.5,35.0,38.5,39.0 44,07/30/96,WAG,MAD,32.0,47.0,37.0,52.0 45,07/31/96,WAG,MDW,33.0,41.0,31.0,46.5 46,08/01/96,WAG,MDW,27.5,37.0,35.5,41.0 47,08/02/96,WAG,MDW,40.0,41.5,38.5,48.0 48,08/04/96,WAG,MDW,34.5,41.0,32.5,40.5 49,07/24/96,MDW,WAG,22.5,26.0,24.0,22.5 51,07/25/96,WAG,MAD,34.0,23.0,32.0,26.5 52,07/27/96,WAG,MAD,33.0,36.0,29.5,45.0 53,07/29/96,WAG,MDW,25.5,29.5,32.0,27.0 54,07/30/96,WAG,MAD,40.0,39.5,40.5,37.0 55,07/31/96,WAG,MDW,33.0,44.0,31.0,32.5 56,08/01/96,WAG,MDW,37.5,38.5,28.5,35.5 57,08/02/96,WAG,MDW,21.5,34.5,38.5,37.5 58,08/04/96,WAG,MDW,32.5,45.0,33.5,37.5 59,07/24/96,WAG,MDW,15.0,23.0,23.0,30.0 61,07/25/96,MAD,WAG,26.0,18.5,27.5,23.5 62,07/27/96,WAG,MAD,20.0,36.0,24.0,36.0 63,07/27/96,WAG,MDW,27.0,28.0,29.0,35.5 64,07/30/96,WAG,MAD,23.5,27.5,30.0,32.0 65,07/31/96,WAG,MDW,33.0,32.0,29.0,26.5 66,08/01/96,WAG,MDW,17.0,50.5,18.5,45.0 67,08/03/96,WAG,MDW,30.0,42.0,36.5,44.5 68,08/04/96,WAG,MDW,38.0,42.5,44.0,49.0 69,07/23/96,WAG,MDW,65.0,11.5,66.0,14.0 71,07/26/96,WAG,MDW,26.0,36.0,40.5,41.5 72,07/26/96,WAG,MDW,30.0,30.0,30.5,21.5 73,07/29/96,WAG,MDW,44.0,30.0,31.0,34.0 74,07/30/96,WAG,MAD,21.5,28.0,38.0,38.5 75,07/31/96,WAG,MDW,30.5,23.5,25.0,25.5 76,08/01/96,WAG,MDW,27.0,46.5,31.0,58.0 77,08/03/96,WAG,MDW,19.0,33.5,24.5,40.5 78,08/04/96,WAG,MDW,66.5,66.5,73.0,68.0 79,07/23/96,WAG,MDW,25.5,20.0,24.5,23.5 81,07/26/96,WAG,MDW,28.5,33.0,31.0,47.0 82,07/26/96,WAG,MDW,29.5,22.0,31.0,35.5 83,07/27/96,WAG,MDW,28.0,29.5,22.5,25.5 84,07/30/96,WAG,MAD,34.0,46.5,42.5,04.5 85,07/31/96,WAG,MDW,35.0,27.0,31.0,33.0 86,08/01/96,WAG,MDW,18.5,32.0,28.0,34.5 87,08/03/96,WAG,MDW,14.0,27.0,15.5,32.5 88,08/03/96,WAG,MDW,22.0,26.5,29.0,31.0 89,07/23/96,WAG,MDW,33.5,40.0,37.5,34.5 91,07/26/96,WAG,MDW,40.0,37.5,36.5,35.0 92,07/26/96,WAG,MDW,32.0,30.0,42.0,38.5 93,07/27/96,WAG,MDW,32.0,18.5,37.5,29.0 94,07/30/96,WAG,MAD,26.5,28.0,27.5,22.5 95,08/01/96,MDW,WAG,10.0,20.0,55.5,62.0 96,08/01/96,WAG,MDW,21.0,21.5,26.5,30.0 97,08/03/96,WAG,MDW,16.5,14.0,13.5,17.0 98,08/03/96,WAG,MDW,16.0,16.5,05.0,13.5 101,07/26/96,WAG,MDW,20.0,21.0,20.5,25.0 102,07/26/96,WAG,MDW,30.5,42.5,43.5,40.0 103,07/27/96,WAG,MDW,28.5,20.5,30.0,26.5 104,07/29/96,WAG,MDW,09.5,14.0,50.0,42.5 105,08/01/96,WAG,MDW,28.0,40.0,37.5,54.0 Each plot can contain other species that were found in the plot but were not actually hit. They are below. 11,CLAARB;TOMNIT;CLARAN;CETISL;THASUB 12,CLARAN;ARNFRI;STELON;SPHGLO;THASUB;CALINE;MASRIC;BRYDIV;RHYRUG;CETISL;BRYNIT 13,SPHRUB;DACARC 14,SAXPUN;PEDLAB;POLBIS 15,POAARC;SAXPUN;HIEALP;CLARAN 16,STELON;ARCLAT;POLBIS;PEDLAP;CETCUC;PETFRI;SAUANG;CLAUNC;CLAGRA;CASTET;DACARC 17,SAXPUN;PYRGRA;SPHRUB 18,DACARC;PETFRI;RUBCHA;CLAGRA 19,BISVIV;DACARC;MASRIC;THASUB 21,PERDAC;PEDCAP;CALINE;CORACU;SALPHL 22,PEDCAP 23,STELON;ARCLAT;CLARAN 24,STELAN;CETCUC;THASUB;CETISL;PEDLAP;PLESCH 25,PYRGRA;ARNLES;LAGGLA;SALRET;POLVIV;SAUANG;HYLSPL;AULTUR;HIEALP;ALENIG;MASRIC 26,STELON;SENATR;POLVIV;SAXPUN;VACULI;POLBIS 27,POLBIS;SENATR;DACARC;RHYRUG 28,SPHRUB;POAARC;STELON;PEDLAP;SAXPUN 29,STELON;PYRGRA;CLAGRA;THASUB;CLADSP;CLARAN 31,PETFRI;RUBCHA;SAXPUN;BISPLU;PEDLAB;POLSP;DACARC;THASUB;CASTET;CETISL;POLSTR 32,BISPLU;CETCUC;POLSTR 33,RUBCHA;THASUB 34,EUTEDW;PETFRI;PYRSEC;SAXPUN;LAGGLA 35,CETISL;ARCLAT 37,RUBCHA;POLBIS;CETCUC;SAXPUN;CLARAN;CLAMIT;CETISL;PELCAN;SPHRUB;PEDLAP 39,POLBIS;CETCUC;DACARC;PELAPH;RHALAN 41,BISPLU;DACARC;CLAGRA 42,ERIVAG;CLADSP;CLAMIT;PETFRI 43,POLBIS;SPHFUS;RUBCHA;CLAGRA 44,THASUB;CLARAN;CALINE;RHYRUG 45,RUBCHA;SALPUL;SPHBAL;STEALP;CLAUNC;PEDLAP 47,VACULI;HYLSPL;CETISL;RUBCHA;DACARC 48,DACARC;PEDLAP LIVE;CLAAMA 49,PEDLAB;MASRIC;ASACHR;PERDAC;CARMIC 51,BISPLU;CLAAMA;SALPUL 52,DACARC;TOMNIT 53,CETCUC;CETISL;CLAMIT;EMPNIG;SALPUL;VACULI;ARCALP 54,POLBIS;PEDLAP;PTICIL;MASRIC;CLARAN;SALPUL;RUBCHA 55,CETCUC;PEDLAP 56,POLBIS;RUBCHA;PEDLAP 57,PETFRI;SPHRUB;PELAPH;CLARAN;DACARC;PEDLAP;CETNIV 58,MASRIC;THASUB;CLAGRA;POLBIS 59,LUZCON;HIEALP;POLBIS;CARVAG;STEALP 61,BISPLU;CLAAMA;CLAMIT;DACARC 62,PETFRI 63,PEDLAP 64,PEDLAP;PELCAN;STEPAS 66,SALPHL;CARSCI;ANEDRU;NOVGLA;EMPNIG;HIEALP 67,POLBIS;DACARC 68,EQUARV; 69,ANDCHA;POTNIV;GENPRO;TOBCOC;BETNAN;ANEDRU;DACARC;CORDIV;DRALAP;BUPTRI;LOIPRO 71,DACARC;CLARAN;CLAGRA;PELAPH 73,SALPUL;PEDLAP;DACARC;SPHRUB;RACLAN;THASUB 74,PELCAN;RUBCHA 75,SALPUL;POLBIS 76,CLAMIT;EMPNIG;EQUARV;PYRGRA;PELAPH;STEALP;DACARC 77,SAUANG;SAXPUN;CETCUC;LUZARC 78,BETNAN;RANGME;PETFRI 79,EQUARV;BISVIV;ANDPOL;POLSTR;PTICRI;RHYRUG;EMPNIG;SPHGLO;REDISP;MASRIC;SENATR; DRYNIT;SALRET 81,DACARC;PEDLAP;POLVIV 82,ANDPOL;PEDLAP;PELCAN;RUBCHA 83,VACULI;POLBIS;RUBCHA 84,CLAGRA;CETCUC;CLAAMA;THASUB 85,EMPNIG;CASTET;SALPUL;PEDLAP 86,SENATR;SAUANG;ANEDRU;VACVIT;DACARC;PYRGRA 87,SAXPUN;SPHGLO;NEPARC;POLVIV 89,DRYNIT;BISVIV;PETFRI;BETNAN;EQUARV;PINVIL 91,PETFRI;LUZWAH 92,PETFRI;CLAPYX;SPHLEN;PEDLAB 93,THASUB;POLVIV 94,RUBCHA;PEDLAP 95,PERDAC 96,SALRET;POLVIV;STETOM;STELON 97,PEDCAP;POLBIS;POLVIV;PSOHYP;CETNIV;CARVAG 98,PERDAC;HIEALP;LUZCON;POLBIS;ASACHR;SPHGLO;THASUB;CLAGRA;CARBIG;PEDLAP 101,THASUB;ASACHR;STELON;SALPHL;CETNIV;HIEALP 102,CASTET;EQUARV;ARNLES 103,OXYMIC;TOFPUS;POLBIS;EMPNIG;DACARC;NEPARC 104,HIEALP;CARBIG;EMPNIG 105,DRYNIT;POAARC;SAXPUN;PYRGRA;CARVAG;MASRIC