Skip to main content

Table 13 Effects of physiographic factors on mean values of soil seed bank patterns

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

Physiographic factors   H′ R E′
Alt (m.a.s.l) 740–790 1.37 ± 0.04a 4.56 ± 0.17a 0.96 ± 0.01a
791–841 1.36 ± 0.04a 4.48 ± 0.16ab 0.95 ± 0.004a
> 841 1.20 ± 0.02b 4.09 ± 0.1b 0.91 ± 0.001b
Aspect (direction) North 1.15 ± 0.04b 3.81 ± 0.17d 0.92 ± 0.01bc
Northeast 1.09 ± 0.03b 3.37 ± 0.11ed 0.96 ± 0.005ba
Northwest 1.59 ± 0.00a 7.00 ± 0.00a 0.82 ± 0.00e
East 1.52 ± 0.04a 5.21 ± 0.17cb 0.96 ± 0.006ba
West 1.46 ± 0.05a 4.54 ± 0.17c 0.98 ± 0.006a
Southeast 0.88 ± 0.08c 2.91 ± 0.32e 0.88 ± 0.01 dc
Southwest 1.07 ± 0.08b 3.4 ± 0.13ed 0.87 ± 0.04d
Slope (degree) 0 1.31 ± 0.04bac 4.8 ± 0.14b 0.85 ± 0.02de
0.1 0.69 ± 0.00f 2.00 ± 0.00e 1.00 ± 0.00a
0.2 1.12 ± 0.08edc 4.13 ± .37cbd 0.88 ± 0.01 dc
0.3 1.39 ± 0.00bac 4.00 ± 0.00cbd 1.00 ± 0.00a
0.5 1.59 ± 0.00a 7.0 ± 0.00a 0.82 ± 0.00fe
1 1.26 ± 0.03bdc 3.99 ± 0.13cbd 0.98 ± 0.003a
1.5 1.31 ± 0.11bac 4.53 ± .41cb 0.91 ± 0.06bc
2 1.48 ± 0.03ba 4.91 ± 0.13b 0.96 ± 0.005a
2.5 1.11 ± 0.096edc 3.41 ± 0.3 cd 0.96 ± 0.01ba
3 0.94 ± 0.06ef 2.94 ± 0.2ed 0.91 ± 0.01c
4 0.86 ± 0.06ef 3.0 ± 0.00ed 0.78 ± 0.06f
6 1.0 ± 0ed 4.0 ± 0.00cbd 0.72 ± 0.00 g
Human activities
Human impacts Nil 1.32 ± 0.04a 4.74 ± 0.17a 0.92 ± 0.01b
Low 1.29 ± 0.04ba 4.41 ± 0.14ba 0.91 ± 0.01b
Moderate 1.196 ± 0.03b 3.73 ± 0.10c 0.95 ± 0.01a
Heavy 1.28 ± 0.05ba 4.19 ± 0.19b 0.95 ± 0.01a
Grazing intensity Nil 1.37 ± 0.04ba 5.01 ± 0.19a 0.93 ± 0.01b
Low 1.43 ± 0.02a 4.74 ± 0.10a 0.93 ± 0.01b
Moderate 1.28 ± 0.04b 4.07 ± 0.13b 0.961988a
Heavy 1.034 ± 0.03c 3.47 ± 0.11c 0.89 ± 0.01c
Disturbance intensity Nil 1.36 ± 0.05ba 4.78 ± 0.20a 0.95 ± 0.01a
Low 1.42 ± 0.03a 4.85 ± 0.16a 0.94 ± 0.01a
Moderate 1.28 ± 0.03b 4.15 ± 0.11b 0.95 ± 0.01a
Heavy 1.05 ± 0.03c 3.52 ± 0.11c 0.89 ± 0.01b
  1. Notice: H′ is the Shannon-Wiener index, R is species richness, E′ is the Shannon evenness; the same letters indicate insignificant variations at P < 0.05