|
Description
|
In July 2021, in each count point, we recorded the height of the highest plant from each stratum (tree, shrub and herbaceous) within the ten-meter-diameter with respect to the center of the influence zone of the count point
Additionally, we took a fish-eye photography of the canopy in each count point as well as from the four geographic directions (North, South, West, East).
We used 180-198°, 0.28x, max. diameter 25 mm, 15 mm focal length, SHUTTERMOON fisheye lens, with the Neewer remote shutter (10091285@@##1 model) attached to the Motorola e7i Power cellular phone (series number ZE222MV6NK).
We used the Gap Light Analyzer software to estimate the canopy cover in each count point.
As some count points lay in open areas, the canopy cover in these points was null.
We put the phone on 120 cm height, on the tripod with the integrated spirit level.
For one count point from the fragmented forest, we did not obtain the photography of the eastern limit, because of the pronounced slope: we estimated this cover as the average covers of the eastern limits of the two adjacent count points.
We expressed the coverage as the percentage of image area covered by the canopy [%].
1. Vegetation atttributes
Point - count point code (T - point in the park, C - point in the edge of the fragment of a natural dioecious forest)
Central [%] - canopy coverage at the center of the influence zone of the count point (100 m diameter)
North [%] - canopy coverage on the north of the center of the influence zone of the count point (100 m diameter)
South [%] - canopy coverage on the south of the center of the influence zone of the count point (100 m diameter)
East [%] - canopy coverage on the east of the center of the influence zone of the count point (100 m diameter)
West [%] - canopy coverage on the west of the center of the influence zone of the count point (100 m diameter)
Arboreous height [m] - the height of the highest tree within the ten-meter-diameter with respect to the center of the influence zone of the count point
Arbustive height [m] - the height of the highest shrub within the ten-meter-diameter with respect to the center of the influence zone of the count point
Herbaceous height [m] - the height of the highest herbaceous plant within the ten-meter-diameter with respect to the center of the influence zone of the count point
Influence zone of the count point - 50-meter-redius around the central point (or, 100-meter-diameter)
Mean,, SD (standard deviation), and coefficient of variation of each vegetation trait for the forest and for the park
2. Comp of veget. attributes
Comparison of vegetation attributes between forest and park
N – sample size
M – mean
SE – standard error of the mean
CI – 95% confidence interval of the mean estimated from the t distribution
Z – Mann-Whitney critical value for the comparison of each vegetation trait between vegetation types |
