NDLI: Effects of seed burial and fire on seedling and sapling recruitment, survival and growth of African savanna woody plant species

Content Provider	Springer Nature Link
Author	Chidumayo, Emmanuel Ngulube
Copyright Year	2012
Abstract	Seed predation and seedling mortality can act as strong demographic “bottlenecks” to sapling recruitment in African savanna woodlands. Fire also limits tree recruitment from saplings by suppressing their growth. I conducted field experiments with 13 woody plant species to assess the effects of seed burial on seedling emergence rates and effects of fire on seedling and sapling survival and growth rates over a period of 8 years at a savanna plot in central Zambia, southern Africa. Seed removal rates by small rodents varied among years and buried seeds had significantly higher emergence rates than seeds exposed to predators in most but not all the species. Annual burning reduced sapling growth in some species but in other species saplings experienced successive shoot die back even in the absence of fire. The findings show that for some woody species, seed predation is an important constraint to seedling recruitment but not for others and annual fires are important hindrances to demography and growth for some species but not others. Thus, demographic “bottlenecks” occur at different life history stages in different savanna woody species and these have the potential to alter woody tree competitive relationships and ultimately savanna structure.
Starting Page	103
Ending Page	114
Page Count	12
File Format	PDF
ISSN	13850237
Journal	Plant Ecology
Volume Number	214
Issue Number	1
e-ISSN	15735052
Language	English
Publisher	Springer Netherlands
Publisher Date	2012-12-04
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Demography Bottleneck Predation Savanna Zambia Plant Sciences
Content Type	Text
Resource Type	Article
Subject	Ecology Plant Science

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