Interspecific competition in germination of bird-dispersed seeds in a habitat with sparse tree vegetation in South Africa

Botanical Studies

Table 2 Seeds attributes for different tree/shrubs that were included in the germination trails

Species	Family	Mean seed size ± standard error		Seed viability storage period (source)
Species	Family	Seed length (mm)	Seed weight (g)	Seed viability storage period (source)
Ziziphus mucronata	Rhamnaceae	8.72 ± 0.13 mm	0.19 ± 0.004 g	Seed viability improved with an age up to1 year in the dry storage (Weiersbye and Witkowski, 2002)
Olea europaea subsp. africana	Oleaceae	7.61 ± 0.14 mm	0.09 ± 0.003 g	Improves seed germination after being stored for 3 year (Fabbri et al., 2004)
Grewia occidentalis	Malvaceae	4.71 ± 0.13 mm	0.04 ± 0.002 g	**Grewia bicolor (c. G. occidentalis), seed can be stored up to 1 year before sowing (Heuzé et al., 2015)
Ehretia rigida	Boraginaceae	3.52 ± 0.10 mm	0.03 ± 0.007 g	** Ehretia cymosa (c. E. rigida) seed can be stored up to 12 months (Angaine et al., 2020)
Searsia lancea	Anacardiaceae	4.21 ± 0.05 mm	0.02 ± 0.001 g	Seed viability persist for up to 1 year (Weiersbye and Witkowski, 2002)