Revegetation of bare patches in a semi-arid rangeland of South Africa: an evaluation of various techniques

Snyman, H.A.

doi:10.1016/s0140-1963(02)00286-0

Cited by 49 publications

(38 citation statements)

References 22 publications

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“…Although E. curvula (a species with a very high purity percentage) consisted of 63% normal seed, which could develop into normal seedlings, and 28.5% fresh seed (seed still having the ability to germinate), it did not establish well in the restoration plots. This coincides with findings from Snyman (2003) who found that E. curvula did not establish good in restoration trials.…”

Section: Resultssupporting

confidence: 91%

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Restoring degraded patches in a semi-arid rangeland of South Africa

Berg

Kellner

2005

Journal of Arid Environments

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Section: Resultssupporting

confidence: 91%

“…7). In previous studies, it was found that deep soil ripping can increase the growth and reproductive potential of over-sown species and may improve the long-term success of re-vegetation projects (De Wet, 2001;Montalvo et al, 2002;Snyman, 2003).…”

Section: Article In Pressmentioning

confidence: 99%

Restoring degraded patches in a semi-arid rangeland of South Africa

Berg

Kellner

2005

Journal of Arid Environments

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“…From species-rich Chilean Matorral soil seed bank samples Figueroa et al (2009) recorded only a total of 23 taxa. This suggests that the soil seed bank of the mesic Tall grassland in South Africa contains a diverse range of plant species making it a valuable resource for rehabilitation (Adams 1996;Snyman 2003). In this study, the highest mean seedling density obtained was from SW-treated soil samples (30.0 ± 2.27 per tray), which was equivalent to 750 ± 56.57 seedlings m -2 .…”

Section: Discussionmentioning

confidence: 53%

Smoke and heat: influence on seedling emergence from the germinable soil seed bank of mesic grassland in South Africa

et al. 2011

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We examined if germination and seedling emergence of species from the soil seed bank of mesic grassland in South Africa differed in their response to smoke or heat treatments alone or combined. Soil seed bank samples taken from 0 to 5 cm depth of the topsoil were treated with smoke-water solution, heat and heat ? smoke-water combined and subsequent emergence of seedlings monitored over 90 days. In total, 790 individuals from 11 different plant families representing 37 graminoid (Poaceae) and non-graminoid species of flowering plants were identified. The most abundant plant families that emerged were Poaceae followed by Asteraceae. Grasses contributed 18% of the germinable seed bank, while non-grass (forbs and trees) species contributed [80%. The most abundant grass species that emerged was Themeda triandra and the most common forb species was Centella asiatica. Compared to the control, smoke-water (SW) and/or smoke-water ? heat (H ? SW) treatment resulted in a 1.6-fold increase in mean number of seedling emergence. SW and H ? SW treatment of soil seed bank also resulted in fourfold to fivefold greater biomass production. These results suggest that emergence of some smoke-responsive perennial grasses (e.g. Themeda triandra) from the soil seed bank can be enhanced using smoke techniques. Moreover, plant-derived smoke could potentially have a significant role in the restoration of degraded grasslands in South Africa and elsewhere.

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“…Chesson 2000). In its native range in South Africa, this has been observed to occur, where Lovegrass dominates following disturbance, but in the absence of disturbance is eventually (in this study 10 years) displaced (Snyman 2003). Whether this can occur in the invaded range of Australia has yet to be observed.…”

Section: Conclusion Can Native Grasses Win?mentioning

confidence: 57%

Early emergence and resource availability can competitively favour natives over a functionally similar invader

et al. 2010

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Invasive plant species can form dense populations across large tracts of land. Based on these observations of dominance, invaders are often described as competitively superior, despite little direct evidence of competitive interactions with natives. The few studies that have measured competitive interactions have tended to compare an invader to natives that are unlikely to be strong competitors because they are functionally different. In this study, we measured competitive interactions among an invasive grass and two Australian native grasses that are functionally similar and widely distributed. We conducted a pair-wise glasshouse experiment, where we manipulated both biotic factors (timing of establishment, neighbour identity and density) and abiotic factors (nutrients and timing of water supply). We found that the invader significantly suppressed the performance of the natives; but its suppression ability was contingent on resource levels, with pulsed water/low nutrients or continuous watering reducing its competitive effects. The native grasses were able to suppress the performance of the invader when given a 3-week head-start, suggesting the invader may be incapable of establishing unless it emerges first, including in its own understorey. These findings provide insight for restoration, as the competitive effect of a functionally similar invader may be reduced by altering abiotic and biotic conditions in favour of natives.

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Revegetation of bare patches in a semi-arid rangeland of South Africa: an evaluation of various techniques

Cited by 49 publications

References 22 publications

Restoring degraded patches in a semi-arid rangeland of South Africa

Restoring degraded patches in a semi-arid rangeland of South Africa

Smoke and heat: influence on seedling emergence from the germinable soil seed bank of mesic grassland in South Africa

Early emergence and resource availability can competitively favour natives over a functionally similar invader

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