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Table 3 Mean number of birds and Pearson’s correlations between disturbance and abundance of birds in different vertical strata of the forest

From: Response of tropical avifauna to visitor recreational disturbances: a case study from the Sinharaja World Heritage Forest, Sri Lanka

Distance from trail (m) Strata Mean number of birds Pearson’s correlation
NRD LRD MRD HRD r p
0 Ground and understory 2.77 2.20 1.23 0.16 −0.230 0.001*
Sub-canopy 2.92 2.28 0.97 0.41 −0.212 0.001*
Canopy 1.58 1.88 1.22 1.13 −0.116 0.141
Above-canopy 1.41 1.54 0.80 1.10 −0.150 0.233
75 Ground and understory 1.52 1.25 1.00 3.00 0.202 0.218
Sub-canopy 1.86 1.76 1.83 3.83 0.263 0.019*
Canopy 4.60 1.50 3.50 1.99 −0.289 0.451
Above-canopy 2.00 2.67 3.00 2.00 0.186 0.474
150 Ground and understory 3.29 4.33 4.83 3.50 0.087 0.492
Sub-canopy 3.29 4.22 4.05 1.36 0.004 0.958
Canopy 2.33 2.94 1.67 1.00 −0.062 0.733
Above-canopy 1.64 2.22 0.67 1.50 −0.114 0.563
  1. * Statistical significance at α = 0.05 level