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Table 12 Vertical soil seed bank composition, abundance, density, and IVI

From: Prosopis juliflora invasion and environmental factors on density of soil seed bank in Afar Region, Northeast Ethiopia

Soil layer Species Ab SBD/m2 F AF R 1 AD R 2 Aab R 3 I VI
Litter Amaranthus thunbergii 39 1733 10 0.04 2.34 6.77 2.37 3.90 3.07 7.79
Litter Bidens pilosa 33 1467 19 0.07 4.45 5.73 2.01 1.74 1.37 7.83
Litter Brachiaria leersioides 300 13333 64 0.25 14.99 52.08 18.26 4.69 3.69 36.94
Litter Cenchrus ciliaris 43 1911 6 0.02 1.41 7.47 2.62 7.17 5.64 9.67
Litter Coccinia grandis 3 133 2 0.01 0.47 0.52 0.18 1.50 1.18 1.83
Litter Crotalaria pycnostachya 1 44 1 0.00 0.23 0.17 0.06 1.00 0.79 1.08
Litter Eragrostis aethiopica 128 5689 12 0.05 2.81 22.22 7.79 10.67 8.40 19.00
Litter Fuirena leptostachya 3 133 3 0.01 0.70 0.52 0.18 1.00 0.79 1.67
Litter Ipomoea indica 4 178 3 0.01 0.70 0.69 0.24 1.33 1.05 2.00
Litter Leucas martinicensis 4 178 2 0.01 0.47 0.69 0.24 2.00 1.57 2.29
Litter Ocimum spicatum 35 1556 17 0.07 3.98 6.08 2.13 2.06 1.62 7.73
Litter Parthenium hysterophorus 139 6178 23 0.09 5.39 24.13 8.46 6.04 4.76 18.61
Litter Physalis lagascae 20 889 9 0.04 2.11 3.47 1.22 2.22 1.75 5.07
Litter Alysicarpus rugosus 2 89 2 0.01 0.47 0.35 0.12 1.00 0.79 1.38
Litter Prosopis juliflora 5 222 3 0.01 0.70 0.87 0.30 1.67 1.31 2.32
Litter Solanum incanum 1 44 1 0.00 0.23 0.17 0.06 1.00 0.79 1.08
Litter Trifolium simense 1 44 2 0.01 0.47 0.17 0.06 0.50 0.39 0.92
Litter Ziziphus spina-christi 2 89 1 0.00 0.23 0.35 0.12 2.00 1.57 1.93
0–3 cm Amaranthus thunbergii 19 844 11 0.04 2.58 3.30 1.16 1.73 1.36 5.09
0–3 cm Bidens pilosa 35 1556 12 0.05 2.81 6.08 2.13 2.92 2.30 7.24
0–3 cm Brachiaria leersioides 319 14178 53 0.21 12.41 55.38 19.42 6.02 4.74 36.57
0–3 cm Cenchrus ciliaris 12 533 3 0.01 0.70 2.08 0.73 4.00 3.15 4.58
0–3 cm Coccinia grandis 1 44 1 0.00 0.23 0.17 0.06 1.00 0.79 1.08
0–3 cm Crotalaria pycnostachya 5 222 4 0.02 0.94 0.87 0.30 1.25 0.98 2.23
0–3 cm Eragrostis aethiopica 60 2667 13 0.05 3.04 10.42 3.65 4.62 3.63 10.33
0–3 cm Fuirena leptostachya 1 44 1 0.00 0.23 0.17 0.06 1.00 0.79 1.08
0–3 cm Heliotropium zeylanicum 1 44 1 0.00 0.23 0.17 0.06 1.00 0.79 1.08
0–3 cm Ocimum spicatum 19 844 9 0.04 2.11 3.30 1.16 2.11 1.66 4.93
0–3 cm Parthenium hysterophorus 102 4533 15 0.06 3.51 17.71 6.21 6.80 5.35 15.08
0–3 cm Physalis lagascae 2 89 2 0.01 0.47 0.35 0.12 1.00 0.79 1.38
0–3 cm Alysicarpus rugosus 1 44 1 0.01 0.47 0.17 0.06 0.50 0.39 0.92
0–3 cm Trifolium simense 4 178 3 0.01 0.70 0.69 0.24 1.33 1.05 2.00
3–6 cm Amaranthus thunbergii 23 1022 7 0.03 1.64 3.99 1.40 3.29 2.59 5.63
3–6 cm Bidens pilosa 6 267 5 0.02 1.17 1.04 0.37 1.20 0.94 2.48
3–6 cm Brachiaria leersioides 74 3289 25 0.10 5.85 12.85 4.50 2.96 2.33 12.69
3–6 cm Cenchrus ciliaris 1 44 1 0.00 0.23 0.17 0.06 1.00 0.79 1.08
3–6 cm Crotalaria pycnostachya 2 89 2 0.01 0.47 0.35 0.12 1.00 0.79 1.38
3–6 cm Eragrostis aethiopica 6 267 5 0.02 1.17 1.04 0.37 1.20 0.94 2.48
3–6 cm Euphorbia prostrata 1 44 1 0.00 0.23 0.17 0.06 1.00 0.79 1.08
3–6 cm Ipomoea indica 1 44 1 0.00 0.23 0.17 0.06 1.00 0.79 1.08
3–6 cm Ocimum urticifolium 6 267 6 0.02 1.41 1.04 0.37 1.00 0.79 2.56
3–6 cm Parthenium hysterophorus 58 2578 11 0.04 2.58 10.07 3.53 5.27 4.15 10.26
3–6 cm Physalis lagascae 2 89 1 0.00 0.23 0.35 0.12 2.00 1.57 1.93
3–6 cm Trifolium simense 3 133 2 0.01 0.47 0.52 0.18 1.50 1.18 1.83
6–9 cm Amaranthus thunbergii 11 489 4 0.02 0.94 1.91 0.67 2.75 2.17 3.77
6–9 cm Bidens pilosa 4 178 4 0.02 0.94 0.69 0.24 1.00 0.79 1.97
6–9 cm Brachiaria leersioides 55 2444 25 0.10 5.85 9.55 3.35 2.20 1.73 10.93
6–9 cm Cenchrus ciliaris 2 89 1 0.00 0.23 0.35 0.12 2.00 1.57 1.93
6–9 cm Crotalaria pycnostachya 2 89 2 0.01 0.47 0.35 0.12 1.00 0.79 1.38
6–9 cm Eragrostis aethiopica 12 533 4 0.02 0.94 2.08 0.73 3.00 2.36 4.03
6–9 cm Ocimum spicatum 6 267 3 0.01 0.70 1.04 0.37 2.00 1.57 2.64
6–9 cm Parthenium hysterophorus 23 1022 8 0.03 1.87 3.99 1.40 2.88 2.26 5.54
6–9 cm Physalis lagascae 3 133 2 0.01 0.47 0.52 0.18 1.50 1.18 1.83
6–9 cm Trifolium simense 1 44 1 0.00 0.23 0.17 0.06 1.00 0.79 1.08
  1. Notice: Ab abundance per soil layer, SBD soil seed bank density per m2, F frequency, AF absolute frequency, R1 relative frequency, AD absolute density, R2 relative density, Aab absolute abundance, R3 relative abundance, IVI importance value index