Mature tree recovery from N/A drought 10.5 Table 16. Ecological water requirements for Acacia stenophylla: processes, drivers and stressors. Regeneration process Regeneration process Development of N/A inflorescences (pollen and egg development) Flowering Spring Summer (Workshop 2015) – Bees and other insects (Workshop 2105) Pollination No differences in seed abundance in relation to flood Bud/seed development frequency or duration (Murray 2014) Mature in spring to early summer (Murray 2014) Does not form a long-lived soil seed bank (Holland et al. Seed fall 2013) Floating seeds, spread during floods (NSWGI&I) Seed dispersal Germination after nicking the seed coat with scapel: 1.1% Germination at 20 C, 2.1% at 25 C (8hrs dark/16 hrs light) (D.Duval personal communication); Nick seed coat, surface sterilise, after ripening (2 months) 77 % (Sahito et al. 2013) C. 80% germination after treating with hot water (M.Henderson personal communication) Germination of one individual from the seed bank under damp conditions (M.Casanova personal communication) Occurs natural flooding (c.f. artificial watering) (Holland et al. 2013) Seedlings relatively common 2011 flood in a single germination event (Capon et al. 2012) Seedlings abundant and widespread (Capon and Balcombe 2015) Colonises cleared when water returns (Workshop 2015) Relatively once established? (Doody and Overton 2012) Seedling establishment and Can grow rapidly (Capon et al. 2012) growth Seedling density negatively related to time since inundation (i.e. greater time, fewer seedlings), and positively related to
Mature tree recovery from drought N/A 10.5 Table 16. Ecological water requirements for Acacia stenophylla: processes, drivers and stressors. Regeneration process Regeneration process Development of inflorescences (pollen and egg development) N/A Flowering Spring – Summer (Workshop 2015) Pollination Bees and other insects (Workshop 2105) Bud/seed development No differences in seed abundance in relation to flood frequency or duration (Murray 2014) Mature in spring to early summer (Murray 2014) Seed fall Does not form a long-lived soil seed bank (Holland et al. 2013) Seed dispersal Floating seeds, spread during floods (NSWGI&I) Germination Germination after nicking the seed coat with scapel: 1.1% at 20 C, 2.1% at 25 C (8hrs dark/16 hrs light) (D.Duval personal communication); Nick seed coat, surface sterilise, after ripening (2 months) 77 % (Sahito et al. 2013) C. 80% germination after treating with hot water (M.Henderson personal communication) Germination of one individual from the seed bank under damp conditions (M.Casanova personal communication) Occurs natural flooding (c.f. artificial watering) (Holland et al. 2013) Seedlings relatively common 2011 flood in a single germination event (Capon et al. 2012) Seedlings abundant and widespread (Capon and Balcombe 2015) Colonises cleared when water returns (Workshop 2015) Seedling establishment and growth Relatively once established? (Doody and Overton 2012) Can grow rapidly (Capon et al. 2012) Seedling density negatively related to time since inundation (i.e. greater time, fewer seedlings), and positively related to
Review%20of%20Water%20Requirements%20for%20Floodplain%20Vegetation_final.docx