I. Data Set Descriptors A. Title: Steven C. Pennings. 2013. Annual monitoring of high marsh plots dominated by Juncus and Borrichia at the GCE LTER from 2013 - 2025. Georgia Coastal Ecosystems LTER Data Catalog (data set PLT-GCEM-1309; /data/PLT-GCEM-1309) B. Accession Number: PLT-GCEM-1309 C. Description 1. Originator(s): Name: Steven C. Pennings Address: Department of Biology and Biochemistry University of Houston Houston, Texas 77204-5513 Country: USA Email: scpennin@central.uh.edu 2. Abstract: Annual monitoring of high marsh plots dominated by Juncus and Borrichia. Plots were established at GCE sites 6 and 10 in 2013, and are monitored annually. The goal is to determine how annual variation in climate and other abiotic factors affects the vegetation composition. 3. Study Type: Monitoring 4. Study Themes: Plant Ecology 5. LTER Core Areas: Primary Production 6. Georeferences: geographic coordinates as data columns 7. Submission Date: Sep 20, 2013 D. Keywords: Angiospermae, Asteraceae, Asterales, Asteranae, Borrichia, Borrichia frutescens, Embryophyta, GCE, Georgia, Georgia Coastal Ecosystems, Juncaceae, Juncus, Juncus roemerianus, Lilianae, LTER, Magnoliopsida, marshes, plant biomass, plant community, Plantae, plants, Poales, Primary Production, Sapelo Island, Spermatophytina, Streptophyta, Tracheophyta, USA, Viridaeplantae, Viridiplantae II. Research Origin Descriptors A. Overall Project Description 1. Project Title: Georgia Coastal Ecosystems LTER - V 2. Principal Investigators: Name: Merryl Alber Address: Dept. of Marine Sciences University of Georgia Athens, Georgia 30602-3636 Country: USA Email: malber@uga.edu 3. Funding Period: Jul 01, 2025 to Jun 30, 2031 4. Objectives: The GCE-V project has 5 objectives. Obj. 1 Characterize spatial and temporal patterns in mean and variability of drivers and responses. This will be done by measuring external drivers (e.g., sea level), marsh and estuarine conditions, the wetland biophysical template, and modeling. Obj. 2 Evaluate linkages between external drivers and ecological responses, and determine whether assessing the variability of abiotic drivers improves explanatory power for predicting ecological responses. This will be done by analyzing long-term data and conducting field campaigns in areas with different salinity standard deviations and time-varying inundation, and complementary mechanistic experiments exploring effects of driver variability (e.g., salinity). Obj. 3 Assess disturbances and their effects on patterns of variability in ecological responses. This will be done by tracking response and recovery to natural disturbances in the field and in ongoing experimental manipulations. Obj. 4 Evaluate how ecological properties change across abiotic gradients, and determine whether variability increases near habitat transitions. This will be done using remote sensing, sampling across gradients of salinity and inundation, and establishing new long-term monitoring sites in forested areas to track upland marsh migration. Obj. 5 Determine the mechanisms by which coastal wetlands respond to changing drivers and assess whether variability informs this understanding. This will be done by conducting univariate and multivariate analyses relating key ecosystem variables (e.g., net ecosystem exchange, plant biomass) to drivers (salinity, inundation, temperature), using remote sensing to investigate spatial and temporal patterns in the mean and variability of marsh productivity and their relationship to variability in climate drivers, and synthesizing results to describe net daytime production and above- and below-ground C stocks and how they might change in response to future conditions. 5. Abstract: The Georgia Coastal Ecosystems (GCE) Long Term Ecological Research (LTER) program, which was established in 2000 to understand estuaries (places where salt water from the ocean mixes with fresh water from the land) and their adjacent coastal wetlands (i.e., marshes and tidal forests) and how they respond to long-term change. The GCE LTER researchers evaluate how environmental conditions (e.g., sea level, temperature, storms and hurricanes) and human activities (e.g., land use) affect the properties of estuaries (e.g., salinity, flooding patterns), and how that in turn affects wetlands and their ability to provide food and refuge for fish, shellfish and birds, to protect the shoreline from storms, to help to keep the water clean, and to store carbon, all of which have significant implications for the US economy. Many of the changes that are occurring are affecting not just average conditions, but also their fluctuations and extremes (e.g., variability). For example, not only has the average high tide level increased over the past decade, but the number of extreme flooding events has also increased, both of which have the potential to lead to wetland loss through drowning. During this award, the research team will conduct studies to systematically evaluate 1) whether we can improve our predictions of ecological responses by considering variability in environmental conditions, and 2) the use of variability as an early indicator of underlying environmental stress. The findings from this research will be important for predicting the long-term survival of coastal wetlands in a time of global change. In addition to research, the GCE program works with teachers and students, coastal managers, citizen scientists, and the general public to enhance scientific literacy and improve our understanding of coastal ecosystems. 6. Funding Source: NSF OCE 2425396 B. Sub-project Description 1. Site Description a. Geographic Location: GCE6 -- Dean Creek, Sapelo Island, Georgia, USA GCE10 -- Hunt Camp, Sapelo Island, Georgia, USA Coordinates: GCE6 -- NW: 081 17 58.28 W, 31 23 38.66 N NE: 081 15 51.76 W, 31 23 38.66 N SE: 081 15 51.76 W, 31 22 15.61 N SW: 081 17 58.28 W, 31 22 15.61 N GCE10 -- NW: 081 17 43.82 W, 31 29 49.29 N NE: 081 15 32.07 W, 31 29 49.29 N SE: 081 15 32.07 W, 31 27 44.35 N SW: 081 17 43.82 W, 31 27 44.35 N b. Physiographic Region: GCE6 -- Barrier island GCE10 -- Barrier island c. Landform Components: GCE6 -- Intertidal salt marsh, sand beach, maritime forest GCE10 -- Intertidal salt marsh bordering maritime forest d. Hydrographic Characteristics: GCE6 -- Site contains Dean Creek and borders Doboy Sound, and is subject to 2-3m semi-diurnal tides GCE10 -- Site borders the Mud River and contains tidal creeks and the upper reach of the Duplin River, and is subject to 2-3m semi-diurnal tides e. Topographic Attributes: GCE6 -- Flat, with elevations ranging from 0-3m above mean low tide GCE10 -- Flat, with elevations ranging from 0-3m above mean low tide f. Geology, Lithology and Soils: GCE6 -- unspecified GCE10 -- unspecified g. Vegetation Communities: GCE6 -- Vegetation is mostly short and tall Spartina alterniflora, with small amounts of Juncus and Borrichia. GCE10 -- Vegetation mostly tall and medium Spartina alterniflora, with some Juncus present. Upland heavily forested. h. History of Land Use and Disturbance: GCE6 -- Oct 01, 2000: Permanent plots were established in two nominal marsh zones based on marsh structure -- creek zone and high marsh -- and eight plots were randomly located in each zone and marked with stakes Oct 01, 2001: Plots were examined for signs of disturbance by wrack inundation, animal activity, and creek bank erosion. The following plots were lost due to catastrophic disturbance and replaced with new plots as indicated: zone 1, plot 3 (not replaced). Oct 19, 2002: Plots were examined for signs of disturbance by wrack inundation, animal activity, and creek bank erosion. The following plots were disturbed by wrack (some have no shoots): C1. The following plots were disturbed by wildlife (some have no shoots): M6, M7, M8 (snails). The following creekbank plots are on creekbank areas that are collapsing: C4, C5. No plots were replaced. Oct 17, 2003: Plots were examined for signs of disturbance by wrack inundation, animal activity, and creek bank erosion. The following plots were disturbed by wildlife (some have no shoots): M8. The following creekbank plots are on creekbank areas that are collapsing: C5. The following plots were lost due to creekbank erosion or catastrophic wrack inundation and were replaced: C2, C4 (replaced with C12, C14). Oct 22, 2004: Plots were examined for signs of disturbance by wrack inundation, animal activity, and creek bank erosion. The following plots were disturbed by wrack: C1, C12, C23, C5, C6, C8. The following plots were disturbed by wildlife (some have no shoots): M8. No plots were lost due to creekbank erosion, and none were replaced. Oct 21, 2005: Plots were examined for signs of disturbance by wrack inundation, animal activity, and creek bank erosion. The following plots were disturbed by wrack: C5, C12. The following plots were disturbed by wildlife: M8. No plots were lost due to creekbank erosion, and none were replaced. Oct 15, 2006: Plots were examined for signs of disturbance by wrack inundation, animal activity, and creek bank erosion. The following plots were disturbed by wrack: C1, C23, C6, C7 (C1, C23 have no plants). The following plots were disturbed by wildlife (some have no shoots): M8. The following creekbank plots are on creekbank areas that are collapsing: C12, C14, C5. No plots were lost and none were replaced. Oct 23, 2007: Plots were examined for signs of disturbance by wrack inundation, animal activity, and creek bank erosion. The following plots were lost due to creekbank erosion, catastrophic wrack disturbance, or catastrophic wildlife activity: C5, C14, C22. The following plots were disturbed by wrack or wildlife activity: C15, C16, C23, M8. No plots were replaced. Oct 26, 2008: Plots were examined for signs of disturbance by wrack inundation, animal activity, and creek bank erosion. The following plots were lost due to creekbank erosion, catastrophic wrack disturbance, or catastrophic wildlife activity: C24. The following plots were disturbed by wrack: C23. The following plots were distrurbed by wildlife (some may have no shoots): M8 (no shoots). The following plots are on creekbank areas that are collapsing: C22, C23. No plots were replaced. Oct 16, 2009: Plots were examined for signs of disturbance by wrack inundation, animal activity, and creek bank erosion. The following plots were lost due to creekbank erosion, catastrophic wrack disturbance, or catastrophic wildlife activity: C22, C23. No other plots were disturbed by wildlife or wrack, and none were replaced. Oct 20, 2010: Plots were examined for signs of disturbance by wrack inundation, animal activity, and creek bank erosion. The following plots were disturbed by wrack: C6. The following plots were lost due to creekbank erosion, catastrophic wrack disturbance, or catastrophic wildlife activity: C32 (replaced with C42). No plots were disturbed by wildlife or are on creekbank areas that are collapsing. Oct 25, 2011: Plots were examined for signs of disturbance by wrack inundation, animal activity, and creek bank erosion. The following plots are located on sections of creek bank that are collapsing: C6, C33. The following plots were lost due to creekbank erosion, catastrophic wrack disturbance, or catastrophic wildlife activity and were replaced: C15 (now C25). Oct 15, 2012: Plots were examined for signs of disturbance by wrack inundation, animal activity, and creek bank erosion. The following plots were disturbed by wrack: C1, C6, C8, C33, C34. No plots were disturbed by creekbank erosion or wildlife, but no living plants were observed in C34 and M5 is now in an apparent die-back zone. Oct 16, 2013: Plots were examined for signs of disturbance by wrack inundation, animal activity, and creek bank erosion. The following plots were lost due to creekbank erosion, catastrophic wrack disturbance, or catastrophic wildlife: C15 (replaced with C25), C16 (replaced with C26), C8 (replaced with 18). Oct 18, 2014: Plots were examined for signs of disturbance by wrack inundation, animal activity, and creek bank erosion. No disturbance was noted, and no plots were lost; however, plots C33, C34 and C26 were relabeled as C43, C44 and C36, resp. for unspecified reasons. Oct 15, 2015: Plots were examined for signs of disturbance by wrack inundation, animal activity, and creek bank erosion. The following plots were disturbed by wrack: M2. The following plots are on creekbank areas that are collapsing (slumping): C42, C36. The following plots were lost due to terminal slumping of the creekbank: C43, C44, C25 (replaced with C53, C54, C35). No plots were disturbed by wildlife. GCE10 -- Oct 01, 2000: Permanent plots were established in two nominal marsh zones based on marsh structure -- creek zone and high marsh -- and eight plots were randomly located in each zone and marked with stakes Oct 01, 2001: Plots were examined for signs of disturbance by wrack inundation, animal activity, and creek bank erosion. No significant disturbance was observed, and no plots were replaced. Oct 20, 2002: Plots were examined for signs of disturbance by wrack inundation, animal activity, and creek bank erosion. The following plots were disturbed by wrack (some have no shoots): C1, C2, C3, C4, C5, C6, C8. The following plots were disturbed by wildlife (some have no shoots): M5 (snails). No disturbance by creekbank erosion or collapse was observed, and no plots were replaced. Oct 19, 2003: Plots were examined for signs of disturbance by wrack inundation, animal activity, and creek bank erosion. The following plots were disturbed by wrack (some have no shoots): C3, M1. The following plots were disturbed by wildlife (some have no shoots): M5. The following creekbank plots are on creekbank areas that are collapsing: C2. No plots were replaced. Oct 22, 2004: Plots were examined for signs of disturbance by wrack inundation, animal activity, and creek bank erosion. The following plots were disturbed by wrack: C7. No disturbance by wildlife was observed, and no plots were lost or replaced. Oct 21, 2005: Plots were examined for signs of disturbance by wrack inundation, animal activity, and creek bank erosion. No plots were distrurbed by wildlife, none were lost due to creekbank erosion, and none were replaced. Oct 15, 2006: Plots were examined for signs of disturbance by wrack inundation, animal activity, and creek bank erosion. Note that a new zone (zone 3) was added at site GCE10 in 2005. This is a juncus zone in the high marsh. Oct 24, 2007: Plots were examined for signs of disturbance by wrack inundation, animal activity, and creek bank erosion. The following plots were disturbed by wrack or wildlife activity: C1, C2, C3, C4, C8, M1, M2. The following plots are on creekbank areas that are collapsing: C13. No plots were lost and none were replaced. Oct 26, 2008: Plots were examined for signs of disturbance by wrack inundation, animal activity, and creek bank erosion. The following plots were lost due to creekbank erosion, catastrophic wrack disturbance, or catastrophic wildlife activity: none. The following plots were disturbed by wrack: none. The following plots were distrurbed by wildlife (some may have no shoots): none. The following plots are on creekbank areas that are collapsing: none. No plots were replaced. Oct 17, 2009: Plots were examined for signs of disturbance by wrack inundation, animal activity, and creek bank erosion. The following plots were disturbed by wrack: C3. No plots were disturbed by wildlife, and none are on creekbank areas that are collapsing or were replaced. Oct 20, 2010: Plots were examined for signs of disturbance by wrack inundation, animal activity, and creek bank erosion. No plots were disturbed or lost, and none were replaced. Oct 26, 2011: Plots were examined for signs of disturbance by wrack inundation, animal activity, and creek bank erosion. No plots were disturbed and none were replaced. Oct 14, 2012: Plots were examined for signs of disturbance by wrack inundation, animal activity, and creek bank erosion. The following plots were disturbed by wrack: C1, C6, C7. The following plots were repositioned due to nearby creekbank erosion: C12, C13. No plots were lost and none were replaced. Oct 13, 2013: Plots were examined for signs of disturbance by wrack inundation, animal activity, and creek bank erosion. No plots were disturbed, and none were lost and replaced. Oct 18, 2014: Plots were examined for signs of disturbance by wrack inundation, animal activity, and creek bank erosion. The following plots were disturbed by wrack: C1, C12, C13, C5. No plots were lost and none were replaced. Oct 24, 2015: Plots were examined for signs of disturbance by wrack inundation, animal activity, and creek bank erosion. The following plots are on creekbank areas that are collapsing (slumping): C1. No plots were disturbed by wrack or wildlife and none were lost and replaced. i. Climate: Climate summary for Sapelo Island, Georgia, based on NWS data from 1980-2010: Daily-aggregated Values: Mean (sample standard deviation) mean air temperature: 20.09°C (7.28°C) minimum air temperature: 15.02°C (7.96°C) maximum air temperature: 24.82°C (6.98°C) total precipitation: 3.26mm (10.3mm) Yearly-aggregated Daily Values: Mean (sample standard deviation) total precipitation (1980-2010): 1124mm (266mm) 2. Experimental or Sampling Design a. Design Characteristics: Annual monitoring of high marsh plots dominated by Juncus and Borrichia. b. Permanent Plots: Eight 0.5 x 0.5 m plots were established at each of two sites (GCE 6 and 10) in 2013. The plots were haphazardly located to contain a high cover of both species in 2013. GCE technicians will obtain exact GPS coordinates for the plots. c. Data Collection Duration and Frequency: Eight 0.5 x 0.5 m plots were established at each of two sites (GCE 6 and 10) in 2013. Plots are sampled for percent cover of all plant species present, height of the tallest Juncus and Borrichia in the plot, extension of Borrichia (distance from midline of plot to most ocean-ward Borrichia stem within a 0.5 m wide transect), and number of Borrichia flowers and seed heads. Beginning of Observations: Aug 02, 2013 End of Observations: Jul 11, 2025 3. Research Methods a. Field and Laboratory Methods: Method 1: Borrichia extension -- The distance from the midline of the plot to the most ocean-ward Borrichia stem within a 0.5 m wide transect (e.g., within the projection of the plot) was measured. Method 2: Flowers and seed heads -- A count was made of all Borrichia flowers and seed heads observed in the quadrat. Method 3: Height -- The height of the tallest Juncus leaf and Borrichia stem in each plot was measured. Method 4: Percent cover -- A 0.5 x 0.5 m quadrat was placed in each 0.5 x 0.5 plot. The quadrat is divided into 100 cells using string. The presence of each plant species in each cell was noted. Because multiple plant species can be present in a single cell, percent cover values can sum to more than 100. b. Protocols: Method 1: none Method 2: none Method 3: none Method 4: none c. Instrumentation: Method 1: none Method 2: none Method 3: none Method 4: none d. Taxonomy and Systematics: Method 1: not applicable Method 2: not applicable Method 3: not applicable Method 4: not applicable e. Speclies List: f. Permit History: Method 1: not applicable Method 2: not applicable Method 3: not applicable Method 4: not applicable 4. Project Personnel a. Personnel: 1: Steven C. Pennings 2: Sasha Greenspan 3: Caroline M. Reddy b. Affiliations: 1: University of Houston, Houston, Texas 2: University of Georgia Marine Institute, Sapelo Island, Georgia 3: University of Georgia, Sapelo Island, Georgia III. Data Set Status and Accessibility A. Status 1. Latest Update: 29-Oct-2025 2. Latest Archive Date: 29-Oct-2025 3. Latest Metadata Update: 29-Oct-2025 4. Data Verification Status: Reviewed by GCE-LTER IM B. Accessibility 1. Storage Location and Medium: Stored at GCE-LTER Data Management Office Dept. of Marine Sciences Univ. of Georgia Athens, GA 30602-3636 USA on media: electronic data download (WWW) or compact disk 2. Contact Person: Name: Adam Sapp Address: Department of Marine Sciences University of Georgia Athens, Georgia 30602 Country: USA Email: asapp@uga.edu 3. Copyright Restrictions: not copyrighted 4. Restrictions: This information is licensed under a Creative Commons Attribution 4.0 International License (see: https://creativecommons.org/licenses/by/4.0/). The consumer of these data ("Data User" herein) has an ethical obligation to cite it appropriately in any publication that results from its use. The Data User should realize that these data may be actively used by others for ongoing research and that coordination may be necessary to prevent duplicate publication. The Data User is urged to contact the authors of these data if any questions about methodology or results occur. Where appropriate, the Data User is encouraged to consider collaboration or co-authorship with the authors. The Data User should realize that misinterpretation of data may occur if used out of context of the original study. While substantial efforts are made to ensure the accuracy of data and associated documentation, complete accuracy of data sets cannot be guaranteed. All data are made available "as is." The Data User should be aware, however, that data are updated periodically and it is the responsibility of the Data User to check for new versions of the data. The data authors and the repository where these data were obtained shall not be liable for damages resulting from any use or misinterpretation of the data. a. Release Date: Affiliates: Sep 20, 2013, Public: Sep 20, 2014 b. Citation: Data provided by the Georgia Coastal Ecosystems Long Term Ecological Research Project, supported by funds from NSF OCE 2425396 (data set PLT-GCEM-1309) c. Disclaimer: The user assumes all responsibility for errors in judgement based on interpretation of data and analyses presented in this data set. 5. Costs: free electronic data download via WWW, distribution on CD may be subject to nominal processing and handling fee IV. Data Structural Descriptors A. Data Set File 1. File Name: PLT-GCEM-1309_9_0.CSV 2. Size: 208 records 3. File Format: ASCII text (comma-separated value format) 3a. Delimiters: single comma 4. Header Information: 5 lines of ASCII text 5. Alphanumeric Attributes: 6. Quality Control Flag Codes: Q = questionable value, I = invalid value, E = estimated value 7. Authentication Procedures: 8. Calculations: 9. Processing History: Software version: GCE Data Toolbox Version 3.9.10 (23-May-2022) Data structure version: GCE Data Structure 1.1 (29-Mar-2001) Original data file processed: Dataset_Accession PLT-GCEM-1309.txt (208 records) Data processing history: 29-Oct-2025: new GCE Data Structure 1.1 created ('newstruct') 29-Oct-2025: 208 rows imported from ASCII data file 'Dataset_Accession PLT-GCEM-1309.txt' ('imp_ascii') 29-Oct-2025: 13 metadata fields in file header parsed ('parse_header') 29-Oct-2025: data structure validated ('gce_valid') 29-Oct-2025: Q/C flagging criteria applied, 'flags' field updated ('dataflag') 29-Oct-2025: automatically assigned study date metadata descriptors based on the range of date values in date/time columns (add_studydates) 29-Oct-2025: updated 1 metadata fields in the Dataset section(s) ('addmeta') 29-Oct-2025: imported Dataset, Project, Site, Study, Status, Supplement metadata descriptors from the GCE Metabase ('imp_gcemetadata') 29-Oct-2025: updated 57 metadata fields in the Dataset, Project, Site, Status, Study, Supplement section(s) ('addmeta') 29-Oct-2025: flags for column Year converted to data columns, flag codes updated in metadata ('flags2cols') 29-Oct-2025: updated 6 metadata fields in the Data section(s) ('addmeta') 29-Oct-2025: updated 15 metadata fields in the Status, Data sections to reflect attribute metadata ('updatecols') 29-Oct-2025: parsed and formatted metadata ('listmeta') B. Variable Information 1. Variable Name: column 1. Day column 2. Month column 3. Year column 4. Flag_Year column 5. Site column 6. Plot column 7. Juncus_percent column 8. Juncus_ht column 9. Borrichia_percent column 10. Borrichia_extension column 11. Borrichia_ht column 12. Borrichia_flowers column 13. Batis_percent column 14. Spartina_percent column 15. Limonium_percent column 16. Solidago_percent column 17. SalVirg_percent column 18. Bare column 19. Iva column 20. Notes 2. Variable Definition: column 1. Calendar day of observation column 2. Calendar month of observation column 3. Calendar year of observation column 4. QA/QC flags for Calendar year of observation (flagging criteria, where "x" is Year: x<2013="Q", x>2020="Q") column 5. GCE site column 6. Plot number column 7. Percent cover - Juncus column 8. Height of tallest leaf - Juncus column 9. Percent cover - Borrichia column 10. Distance from middle to farthest stem - Borrichia column 11. Height of tallest stem - Borrichia column 12. Number of flowers and seed heads - Borrichia column 13. Percent cover - Batis column 14. Percent cover - Spartian column 15. Percent cover - Limonium column 16. Percent cover - Solidago column 17. Percent cover - SalVirg column 18. Percent cover - Bare column 19. Percent cover - Iva column 20. Notes from field data sheets 3. Units of Measurement: column 1. DD column 2. MM column 3. YYYY column 4. none column 5. none column 6. none column 7. percent column 8. cm column 9. percent column 10. cm column 11. cm column 12. count column 13. percent column 14. percent column 15. percent column 16. percent column 17. percent column 18. percent column 19. percent column 20. none 4. Data Type a. Storage Type: column 1. integer column 2. integer column 3. integer column 4. string column 5. integer column 6. integer column 7. floating-point column 8. floating-point column 9. floating-point column 10. floating-point column 11. floating-point column 12. floating-point column 13. floating-point column 14. floating-point column 15. floating-point column 16. floating-point column 17. floating-point column 18. floating-point column 19. floating-point column 20. string b. Variable Codes: Flag_Year: Q = questionable value c. Numeric Range: column 1. 2 to 29 column 2. 7 to 10 column 3. 2013 to 2025 column 4. (none) column 5. 6 to 10 column 6. 1 to 8 column 7. 0 to 100 column 8. 65 to 155 column 9. 0 to 95 column 10. -260 to 1020 column 11. 16 to 120 column 12. 0 to 23 column 13. 0 to 100 column 14. 0 to 74 column 15. 0 to 30 column 16. 0 to 22 column 17. 0 to 34 column 18. 0 to 80 column 19. 0 to 26 column 20. (none) d. Missing Value Code: 5. Data Format a. Column Type: column 1. numerical column 2. numerical column 3. numerical column 4. text column 5. numerical column 6. numerical column 7. numerical column 8. numerical column 9. numerical column 10. numerical column 11. numerical column 12. numerical column 13. numerical column 14. numerical column 15. numerical column 16. numerical column 17. numerical column 18. numerical column 19. numerical column 20. text b. Number of Columns: 20 c. Decimal Places: column 1. 0 column 2. 0 column 3. 0 column 4. 0 column 5. 0 column 6. 0 column 7. 0 column 8. 0 column 9. 0 column 10. 0 column 11. 0 column 12. 0 column 13. 0 column 14. 0 column 15. 0 column 16. 0 column 17. 0 column 18. 0 column 19. 0 column 20. 0 6. Logical Variable Type: column 1. datetime (discrete) column 2. datetime (discrete) column 3. datetime (discrete) column 4. coded value (none) column 5. nominal (discrete) column 6. nominal (discrete) column 7. data (continuous) column 8. data (continuous) column 9. data (continuous) column 10. data (continuous) column 11. data (continuous) column 12. data (continuous) column 13. data (continuous) column 14. data (continuous) column 15. data (continuous) column 16. data (continuous) column 17. data (continuous) column 18. data (continuous) column 19. data (continuous) column 20. free text (none) 7. Flagging Criteria: column 1. x<1="I";x>31="I" column 2. x<1="I";x>12="I";x<7="Q";x>10="Q" column 3. x<2013="Q";x>2020="Q" column 4. none column 5. x<1="I";x>11="I";x<6="Q";x>10="Q" column 6. x<1="Q";x>8="Q" column 7. x<0="I";x>100="I";x<0="Q";x>100="Q" column 8. x<0="I";x>300="I";x<10="Q";x>250="Q" column 9. x<0="I";x>100="I";x<0="Q";x>100="Q" column 10. none column 11. x<0="I";x>200="I";x<10="Q";x>175="Q" column 12. x<0="I";x>100="I";x<0="Q";x>100="Q" column 13. x<0="I";x>100="I";x<0="Q";x>100="Q" column 14. x<0="I";x>100="I";x<0="Q";x>100="Q" column 15. x<0="I";x>100="I";x<0="Q";x>100="Q" column 16. x<0="I";x>100="I";x<0="Q";x>100="Q" column 17. x<0="I";x>100="I";x<0="Q";x>100="Q" column 18. x<0="I";x>100="I";x<0="Q";x>100="Q" column 19. x<0="I";x>100="I";x<0="Q";x>100="Q" column 20. none C. Data Anomalies: V. Supplemental Descriptors A. Data Acquisition 1. Data Forms: 2. Form Location: 3. Data Entry Validation: B. Quality Assurance/Quality Control Procedures: C. Supplemental Materials: D. Computer Programs: E. Archival Practices: F. Publications: not specified G. History of Data Set Usage 1. Data Request History: not specified 2. Data Set Update History: Nov 07, 2023: added data from 2023 sampling Aug 15, 2024: added data from 2024 sampling Oct 29, 2025: added data from 2025 sampling 3. Review History: none 4. Questions and Comments from Users: none