https://ipt.gbif.no/resource?r=barnacle_goose_impact_on_vegetation_on_storholmen Lea Martin University of Oregon

Eugene Oregon 97403 US

lea.kate.martin@gmail.com Moritz Kessler Leopold-Franzens-Universität Innsbruck

Innsbruck Tirol 6020 AT

kessler.mori@gmail.com Wiktoria Orlik University of Bergen

Bergen Vestlandet 5007 NO

wiktoriawrynkiewicz16@gmail.com Marion Oswald University of Rostock

Rostock Mecklenburg-Vorpommern 18051 DE

oswald.marion1426@gmail.com Svein Tore Hermansen University of Bergen

Bergen Vestlandet 5007 NO

03sveintore@gmail.com 2026-09-02 eng This is the data collected on Storholmen Island in Kongsfjiorden under the supervision of Dr. Maarton Loonen. Sampling plots were found using predetermined GPS coordinates. For the project, vegetation coverage data was recorded using the quadrat frequency method, as well as goose feces coverage. Plant samples of Saxifraga cespitosa and Saxifraga oppositifolia were taken from every 5 plots in order to perform SLA and CN analyses. Samplingevent GBIF Dataset Type Vocabulary: http://rs.gbif.org/vocabulary/gbif/dataset_type_2015-07-10.xml Observation GBIF Dataset Subtype Vocabulary: http://rs.gbif.org/vocabulary/gbif/dataset_subtype.xml This work is licensed under a Creative Commons Attribution (CC-BY 4.0) License. Creative Commons Attribution 4.0 International https://spdx.org/licenses/CC-BY-4.0.html CC-BY-4.0 These coordinates are the location of the plots that were examined, provided by Dr. Maarton Loonen. 12.206361 12.22575 78.934083 78.928306 2026-08-11 2026-08-15 We would like to acknowledge the University Centre in Svalbard for providing the opportunity and funding for this project data collection. We would also like to acknowledge Dr. Maarton Loonen for his continued help in organizing and providing guidance on this project.  notPlanned Peter Lin The University Centre in Svalbard

Longyearbyen Svalbard 9170 NO

Luke Marsden University Centre in Svalbard

Longyearbyen Svalbard 9170 NO

lukem@unis.no Finding the plot: Use the handheld GPS device to find the coordinates on the grid that Maarten has already determined for this year’s study. Record quadrat # and coordinates. Use marker flags and place them in the center of each pair of coordinates. Then, obtain a 50x50 cm quadrat and align it so that the flag is in the middle of the quadrat. Do this for each marker flag. Slope Angle: Open the compass with the mirror pointing towards you and the mirror is pointed sideways or vertical. Hold the compass at eye level, with the adjustable ring pointing east towards you and align the compass to eye height of another student further away. At this point the northern direction should point perpendicular from the line of sight. Then the clinometer arrow will point at the angle of the surface. Slope Aspect: Stand with your back towards the slope (facing down the slope). Align compass needle with north-poiting arrow. Read the direction/degrees at the marker point. Elevation: Record from GPS device. Goose feces cover (frequency method x/16, %): Determining the % cover of goose feces involves noting if feces is present inside each full square in each quadrat. Go square by square inside the quadrat noting if feces is present or not, then tally the total number of squares out of 16 that contain feces to determine the % cover in the quadrat. Photograph: Take a photo of the quadrat from above Label photo clearly Note that this step has been complete in the data table NDVI: This device will capture the health and lushness of the vegetation. A field assistant or professor will use the device with the help of a student. Recording plants in the quadrant: Identify every plant present to species level (if able) for vascular plants, and to group/family for non-vascular plants (ex. mosses, lichens, liverwort, etc.) Record in data table. Plant species cover (frequency method x/16, %): Determining the % cover involves noting the species present inside each full square in each quadrat (similar to goose feces method). Start with one species and go square by square noting if it is present or not. Then tally the total number of squares out of 16 that contain that species to determine the % cover in the quadrat. Move on to the next species, and the next, etc using the same technique until every species has been accounted for. (TAKE PHOTOS OF SHEET WHEN FILLED OUT, & ALWAYS NOTE QUADRAT #) Sampling/collecting the leaves: Obtain 10 fully expanded, healthy, green, mature leaves that weren’t grazed on from S. polaris and S. cespitosa in plots with identifiers ending in zero or five (e.g., plot numbered 5, 10, 15, and so forth). To minimize contamination, tweezers or latex gloves are used to extract the leaves. In quadrats that contained sparse vegetation or were completely bare, leaf samples can be obtained from nearby areas in the same plot. If a plot ID ending in zero or five is in a place beyond reach (e.g., in the water), another plot can be chosen haphazardly for sampling. The leaves should be placed in a labelled (Quadrat and species) plastic/paper bag and transported to the laboratory for further processing and analysing. This study took place between August 11 2026 to August 15 2026 on Storholmen. Vegetation documentation through quadrat method, plant sample collected every 5 plots. Same size quadrats, standardized procedure. Peter Lin 2026-09-02T09:52:24.433+00:00 dataset Martin L, Kessler M, Orlik W, Oswald M, Hermansen S T (2026). Barnacle Geese Impact on Vegetation on Storholmen Island, Kongsfjiorden. Version 1.1. The University Centre in Svalbard. Samplingevent dataset. https://ipt.gbif.no/resource?r=barnacle_goose_impact_on_vegetation_on_storholmen&v=1.1 https://ipt.gbif.no/resource?id=barnacle_goose_impact_on_vegetation_on_storholmen/v1.1.xml