From dark to darkness, negative phototropism influences the support-tree location of the massive woody climber Hydrangea serratifolia (Hydrangeaceae) in a Chilean temperate rainforest

Figures & data

Figure 1. Rose diagrams, density lines and circular boxplots of H. serratifolia juvenile searcher (a, b) and ascending (c, d) shoots. Black arrows represent rho (pointing to the mean direction) and blue line the circular median value. Light gray petal represents the frequency, in sunset degrees, along the sampling days. Dark gray petals represents the frequency distribution of SS (a) and AS (c), respectively. Black dots represent each individual orientation measurement for SS and AS over the circle (a–c).

Table 1. Circular summary statistics for H. serratifolia’s juvenile searcher (SS) and ascending shoots (AS).

Descriptive statistics	Searchers	Ascending
Mean direction (µ)	226.2°	205.8°
Median direction	228°	210°
Mean resultant length (rho)	0.664	0.653
Circular variance	0.336	0.347
Circular standard deviation (SD)	0.92°	0.90°
Circular dispersion	0.56°	0.57°
Mean direction confidence interval 95%	[211.83°; 236.53°]	[191.03°; 219.91°]

Figure 2. Frequency histograms and density lines of diffuse light incidence (ISF %) registered inside the plots, forest light environment (dark gray bars), and above each SS measured individual (light gray bars).

Data availability statement

All data and/or R codes that support the results of this survey are available from the corresponding author upon reasonable request.