Vegetation plot network
I walked along an elevation gradient at four sites in Sweden to
establish a network of 5x5-meter vegetation plots to record the presence
and absence of pine trees. Abisko, Jäkkvik, Nordli, and Ånn were chosen
because they are among the few locations in Fennoscandia that harbor a
treeline composed of birch and pine trees. Between the summer of 2020
and 2021, I carried out data collection by annotating the presence and
absence of pine, and for each observation, I annotated the geographical
coordinates. A minimum distance of 150 meters was used between
observations to ensure an accurate representation of the true
distribution of pine. This fieldwork campaign yielded a total of 195
data points unevenly distributed between the four locations: Abisko
(n=77), Jäkkvik (n=37), Nordli (n=43), Ånn (n=38). This dataset is now
referred to as PLOT.