Is there a 'browse trap'? Dynamics of herbivore impacts on trees and grasses in an African savanna

Journal of Ecology

Volumn 102, Issue 3, 2014, Pages 595-602

  Staver, Ann Carla ^a   Bond, William J ^b  

^a Department of Ecology Evolution and Environmental Biology Columbia University ^*  (United States)

^b UNIVERSITY OF CAPE TOWN   (South Africa)

Author keywords

Browse trap; Browsing; Demographic variability; Elephant; Grass; Herbivory; Large mammal; Plant herbivore interactions; Savanna; Tree

Indexed keywords

BIOMASS; BROWSING; ELEPHANT; EXCLUSION EXPERIMENT; GRASS; HERBIVORE; HERBIVORY; PLANT COMMUNITY; PLANT-HERBIVORE INTERACTION; POPULATION DYNAMICS; RECRUITMENT (POPULATION DYNAMICS); REINTRODUCTION; SAVANNA; TREE;

HLUHLUWE-UMFOLOZI PARK; KWAZULU-NATAL; SOUTH AFRICA;

AEPYCEROS MELAMPUS; MAMMALIA; POACEAE; TRAGELAPHUS ANGASII;

EID: 84898811147     PISSN: 00220477     EISSN: 13652745     Source Type: Journal    
DOI: 10.1111/1365-2745.12230     Document Type: Article

References (54)

1. Archibald, S., Bond, W., Stock, W. & Fairbanks, D. (2005) Shaping the landscape: fire-grazer interactions in an African savanna. Ecological Applications, 15, 96-109.
2. Asner, G.P., Levick, S.R., Kennedy-Bowdoin, T., Knapp, D.E., Emerson, R., Jacobson, J., Colgan, M.S. & Martin, R.E. (2009) Large-scale impacts of herbivores on the structural diversity of African savannas. Proceedings of the National Academy of Sciences of the United States of America, 106, 4947-4952.
3. Augustine, D. & McNaughton, S. (2004) Regulation of shrub dynamics by native browsing ungulates on East African rangeland. Journal of Applied Ecology, 41, 45-58.
4. Balfour, D. & Howison, O. (2002) Spatial and temporal variation in a mesic savanna fire regime: responses to variation in annual rainfall. African Journal of Range and Forage Science, 19, 45-53.
5. Barnes, M. (2001) Effects of large herbivores and fire on the regeneration of Acacia erioloba woodlands in Chobe National Park, Botswana. African Journal of Ecology, 39, 340-350.
6. Baxter, P. & Getz, W. (2005) A model-framed evaluation of elephant effects on tree and fire dynamics in African savannas. Ecological Applications, 15, 1331-1341.
7. Bell, R.H.V. (1984) Notes on elephant-woodland interactions. Status and Conservation of Africa's Elephants and Rhinos (ed. D. Cumming) pp. 98-103. IUCN, Gland, Switzerland.
8. Bond, W.J. (2008) What Limits Trees in C-4 Grasslands and Savannas? Annual Review of Ecology Evolution and Systematics, 39, 641-659.
9. Bond, W. & Keeley, J. (2005) Fire as a global "herbivore": the ecology and evolution of flammable ecosystems. Trends in Ecology and Evolution, 20, 387-394.
10. Bond, W. & Loffell, D. (2001) Introduction of giraffe changes acacia distribution in a South African savanna. African Journal of Ecology, 39, 286-294.
11. Bond, W. & Midgley, J. (2001) Ecology of sprouting in woody plants: the persistence niche. Trends in Ecology and Evolution, 16, 45-51.
12. Bond, W., Woodward, F. & Midgley, G. (2005) The global distribution of ecosystems in a world without fire. New Phytologist, 165, 525-537.
13. Buitenwerf, R., Bond, W.J., Stevens, N. & Trollope, W.S.W. (2011) Increased tree densities in South African savannas: >50 years of data suggests CO2 as a driver. Global Change Biology, 18, 675-684.
14. Côté, S.D., Rooney, T.P., Tremblay, J.-P., Dussault, C. & Waller, D.M. (2004) Ecological impacts of deer overabundance. Annual Review of Ecology Evolution and Systematics, 35, 113-147.
15. Cramer, M.D., van Cauter, A. & Bond, W.J. (2010) Growth of N2-fixing African savanna Acacia species is constrained by below-ground competition with grass. Journal of Ecology, 98, 156-167.
16. Cromsigt, J.P., Prins, H.H. & Olff, H. (2009) Habitat heterogeneity as a driver of ungulate diversity and distribution patterns: interactions of body mass and digestive strategy. Diversity and Distributions, 15, 513-522.
17. Dublin, H., Sinclair, A. & McGlade, J. (1990) Elephants and fire as causes of multiple stable states in the Serengeti-Mara woodlands. Journal of Animal Ecology, 59, 1147-1164.
18. February, E.C., Higgins, S.I., Bond, W.J. & Swemmer, L. (2013) Influence of competition and rainfall manipulation on the growth responses of savanna trees and grasses. Ecology, 94, 1155-1164.
19. Fornara, D.A. & Du Toit, J.T. (2007) Browsing lawns? Responses of Acacia nigrescens to ungulate browsing in an African savanna. Ecology, 88, 200-209.
20. Gillson, L. (2006) A "large infrequent disturbance" in an East African savanna. African Journal of Ecology, 44, 458-467.
21. Guldemond, R. & Van Aarde, R. (2008) A meta-analysis of the impact of African elephants on Savanna Vegetation. Journal of Wildlife Management, 72, 892-899.
22. Hanan, N.P., Sea, W.B., Dangelmayr, G. & Govender, N. (2008) Do fires in savannas consume woody biomass? A comment on approaches to modeling savanna dynamics. American Naturalist, 171, 851-856.
23. Higgins, S., Bond, W. & Trollope, W. (2000) Fire, resprouting and variability: a recipe for grass-tree coexistence in savanna. Journal of Ecology, 88, 213-229.
24. Hoffmann, W. (1999) Fire and population dynamics of woody plants in a neotropical savanna: matrix model projections. Ecology, 80, 1354-1369.
25. Hoffmann, W. & Solbrig, O. (2003) The role of topkill in the differential response of savanna woody species to fire. Forest Ecology and Management, 180, 273-286.
26. Hoffmann, W., Adasme, R., Haridasan, M., de Carvalho, MT., Geiger, E., Pereira, M., Gotsch, S. & Franco, A. (2009) Tree topkill, not mortality, governs the dynamics of savanna-forest boundaries under frequent fire in central Brazil. Ecology, 90, 1326-1337.
27. Holdo, R.M., Sinclair, A.R.E., Dobson, A.P., Metzger, K.L., Bolker, B.M., Ritchie, M.E. & Holt, R.D. (2009) A disease-mediated trophic cascade in the Serengeti and its implications for ecosystem C. PLoS Biology, 7, e1000210.
28. Knapp, A.K., Blair, J.M., Briggs, J.M., Collins, S.L., Hartnett, D.C., Johnson, L.C. & Towne, E.G. (1999) The keystone role of bison in North American tallgrass prairie. BioScience, 49, 39-50.
29. Lehmann, C.E., Archibald, S.A., Hoffmann, W.A. & Bond, W.J. (2011) Deciphering the distribution of the savanna biome. New Phytologist, 191, 197-209.
30. McNaughton, S. (1984) Grazing lawns: animals in herds, plant form, and coevolution. American Naturalist, 124, 863-886.
31. Midgley, J.J., Lawes, M.J. & Chamaillé-Jammes, S. (2010) TURNER REVIEW No. 19. Savanna woody plant dynamics: the role of fire and herbivory, separately and synergistically. Australian Journal of Botany, 58, 1-11.
32. Moncrieff, G.R., Chamaillé-Jammes, S., Higgins, S.I., O'Hara, R.B. & Bond, W.J. (2011) Tree allometries reflect a lifetime of herbivory in an African savanna. Ecology, 92, 2310-2315.
33. O'Kane, C.A.J., Duffy, K.J., Page, B.R. & Macdonald, D.W. (2012) Heavy impact on seedlings by the impala suggests a central role in woodland dynamics. Journal of Tropical Ecology, 28, 291-297.
34. Olff, H.H., Ritchie, M.E.M. & Prins, H.H.T.H. (2002) Global environmental controls of diversity in large herbivores. Nature, 415, 901-904.
35. Palmer, S.C.F. & Truscott, A.M. (2003) Browsing by deer on naturally regenerating Scots pine (Pinus sylvestris L.) and its effects on sapling growth. Forest Ecology and Management, 182, 31-47.
36. Pinheiro, J., Bates, D., DebRoy, S., Sarkar, D. & the R Development Core Team (2012) nlme: Linear and Nonlinear Mixed Effects Models. R package version 3.1-113.
37. Prins, H. & van der Jeugd, H.P. (1993) Herbivore population crashes and woodland structure in East Africa. Journal of Ecology, 81, 305-314.
38. Prior, L.D., Williams, R.J. & Bowman, D.M. (2010) Experimental evidence that fire causes a tree recruitment bottleneck in an Australian tropical savanna. Journal of Tropical Ecology, 26, 595-603.
39. Riginos, C. (2009) Grass competition suppresses savanna tree growth across multiple demographic stages. Ecology, 90, 335-340.
40. Sharam, G., Sinclair, A.R.E. & Turkington, R. (2006) Establishment of broad-leaved thickets in Serengeti, Tanzania: the influence of fire, browsers, grass competition, and elephants. Biotropica, 38, 599-605.
41. Staver, A.C., Archibald, S. & Levin, S.A. (2011a) Tree cover in sub-Saharan Africa: rainfall and fire constrain forest and savanna as alternative stable states. Ecology, 92, 1063-1072.
42. Staver, A.C., Archibald, S. & Levin, S.A. (2011b) The global extent and determinants of savanna and forest as alternative biome states. Science, 334, 230-232.
43. Staver, A.C., Bond, W.J. & February, E.C. (2011) History matters: tree establishment variability and species turnover in an African savanna. Ecosphere, 2, art49.
44. Staver, A.C. & Levin, S.A. (2012) Integrating theoretical climate and fire effects on savanna and forest systems. American Naturalist, 180, 211-224.
45. Staver, A.C., Bond, W.J., Stock, W.D., van Rensburg, S.J. & Waldram, M.S. (2009) Browsing and fire interact to suppress tree density in an African savanna. Ecological Applications, 19, 1909-1919.
46. Staver, A.C., Bond, W.J., Cramer, M.D. & Wakeling, J.L. (2012) Top-down determinants of niche structure and adaptation among African Acacias. Ecology Letters, 15, 673-679.
47. Tanentzap, A.J. & Coomes, D.A. (2011) Carbon storage in terrestrial ecosystems: do browsing and grazing herbivores matter? Biological Reviews of The Cambridge Philosophical Society, 87, 72-94.
48. Trollope, W.S.W. & Tainton, N.M. (1986) Effect of fire intensity on the grass and bush components of the Eastern Cape thornveld. Journal of the Grassland Society of Southern Africa, 3, 37-42.
49. Wakeling, J.L., Cramer, M.D. & Bond, W.J. (2010) Is the lack of leguminous savanna trees in grasslands of South Africa related to nutritional constraints? Plant and Soil, 336, 173-182.
50. Wakeling, J.L., Staver, A.C. & Bond, W.J. (2011) Simply the best: the transition of savanna saplings to trees. Oikos, 120, 1448-1451.
51. Waldram, M.S., Bond, W.J. & Stock, WD (2008) Ecological engineering by a mega-grazer: white Rhino impacts on a South African savanna. Ecosystems, 11, 101-112.
52. Werner, P.A. & Prior, L.D. (2013) Demography and growth of subadult savanna trees: interactions of life history, size, fire season, and grassy understory. Ecological Monographs, 83, 67-93.
53. Wilson, S.L. & Kerley, G.I.H. (2003) Bite diameter selection by thicket browsers: the effect of body size and plant morphology on forage intake and quality. Forest Ecology and Management, 181, 51-65.
54. Young, T. (1994) Natural die-offs of large mammals: implications for conservation. Conservation Biology, 8, 410-418.