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Table 5 Attributes of PCA pertains to various variables

From: Appraisal of arid land status: a holistic assessment pertains to bio-physical indicators and ecosystem values

Events Pulse Inter-pulse Non-pulse
F1 F2 F3 F4 F1 F2 F3 F4 F1 F2 F3 F4
Eigen value 4.34 3.17 2.52 1.97 5.527 3.016 2.192 1.684 5.465 3.115 2.699 1.755
Variability (%) 35.44 22.69 14.86 11.61 39.51 25.74 12.89 9.90 36.77 24.27 15.87 10.32
Cumulative % 35.44 58.13 73.00 84.62 39.51 65.25 78.14 88.05 36.77 61.04 76.91 87.24
Richness 0.751 a − 0.376 − 0.058 − 0.398 0.776 a 0.343 − 0.292 − 0.229 − 0.402 0.832 a − 0.003 − 0.255
Shannon and Weaver index 0.813 a − 0.428 0.062 − 0.296 0.888 a 0.330 − 0.073 − 0.202 − 0.402 0.743 a 0.067 − 0.284
Evenness 0.582 0.020 0.661 0.025 0.307 − 0.040 0.689 − 0.392 0.332 − 0.670 0.047 − 0.331
Organic carbon − 0.109 0.608 − 0.209 − 0.461 0.294 0.588 0.008 0.399 − 0.165 0.509 − 0.326 0.643
Soil P − 0.567 − 0.224 0.558 0.050 − 0.580 0.199 0.437 − 0.222 0.810 a − 0.001 0.527 0.123
Soil nitrogen − 0.749 a 0.130 0.411 − 0.261 0.048 − 0.641 0.481 0.026 0.161 − 0.232 0.534 0.309
Soil pH 0.547 0.019 − 0.422 0.375 0.569 0.385 0.363 0.535 − 0.680 0.066 0.337 − 0.004
Electric conductivity 0.089 − 0.475 − 0.064 0.566 0.388 0.575 0.212 0.145 0.022 − 0.041 0.878 a − 0.172
Soil moisture 0.418 0.680 0.387 − 0.144 0.534 − 0.048 0.461 − 0.250 − 0.002 0.396 0.775 a 0.007
Removal of plant parts 0.230 0.565 − 0.168 0.053 − 0.467 0.708 a − 0.332 − 0.080 0.683 0.316 − 0.146 − 0.526
Litter condition − 0.241 − 0.158 0.361 0.786 a − 0.422 0.203 0.552 0.569 0.846 a 0.038 − 0.411 0.120
Total herbage biomass gm −2 0.144 − 0.742 a − 0.119 − 0.376 0.665 0.380 − 0.086 − 0.481 − 0.415 0.345 0.005 − 0.550
Botanical species composition of climax vegetation 0.667 0.267 0.558 − 0.025 − 0.757 0.494 0.087 − 0.249 0.883 a 0.322 − 0.186 − 0.090
Relative importance value (RIV) of climax species 0.764 a − 0.182 0.430 0.230 − 0.696 − 0.143 0.126 − 0.400 0.723 a 0.349 0.115 0.101
Carrying capacity (ACU/100 ha) 0.321 0.837 a − 0.105 0.302 − 0.861 a 0.270 − 0.337 0.076 0.788 a 0.095 − 0.216 − 0.359
Grazing intensity − 0.368 − 0.096 0.647 − 0.238 − 0.407 0.531 0.351 − 0.237 0.687 0.116 0.502 0.028
Density of un-palatable species − 0.007 0.134 0.359 − 0.020 − 0.233 0.450 0.364 − 0.114 0.331 0.692 0.035 0.452
  1. a Variable with loading ≥0.70 were identified as significant variable and marked in italics