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Ecological Research

, Volume 32, Issue 5, pp 667–676 | Cite as

Invasive alien trees reduce bird species richness and abundance of mutualistic frugivores and nectarivores; a bird’s eye view on a conflict of interest species in riparian habitats

  • Joy Rumbidzai Mangachena
  • Sjirk Geerts
Original Article

Abstract

Invasive alien plants have major ecological effects, in particular in riparian habitats. While effects of alien tree invasions on riparian plants are well studied, effects on animals are less well understood. Invasive alien trees can have a positive effect by adding habitat and food sources, or have a negative effect, by replacing native food plants. Here we use birds as indicators to determine the impacts of an invasive Eucalyptus tree species in riparian areas of the Cape Floristic Region (CFR) of South Africa. Birds are an ideal study group because they are mobile, respond quickly to habitat changes and feed at different trophic levels. Fixed-point bird counts were done during winter and spring at near-pristine and Eucalyptus camaldulensis invaded riparian habitats. A total of 1142 birds from 44 species were recorded. Bird assemblages in invaded sites are almost a complete subset (24 species) of those in near-pristine areas (42 species). Invaded areas were missing 18 species and contained a total of 128 fewer individuals. This is due to declines in insectivores, frugivores, granivores, raptors and omnivores and the absence of nectarivores in invaded sites. From a bird’s perspective, the prioritisation of E. camaldulensis removal from the CFR’s river systems is justified, but whether bird species will return to cleared areas needs to be determined.

Keywords

Bird feeding guilds Cape Floristic Region Eucalyptus camaldulensis Nectar feeding birds Plant invasions Raptor 

Notes

Acknowledgements

We thank the landowners who allowed access to their properties and Michelle Slabber for fieldwork assistance. We thank Joseph Kioko and Mirijam Gaertner for comments on an earlier draft. We acknowledge funding from the DST-NRF Centre of Excellence for Invasion Biology and the Working for Water Programme through their collaborative research project on “Integrated Management of invasive alien species in South Africa”. Funding to SG was also provided by the National Research Foundation (Grant 87843).

Supplementary material

11284_2017_1481_MOESM1_ESM.pdf (278 kb)
Supplementary material 1 (PDF 277 kb)

References

  1. Allsopp M, Cherry M (2004) An Assessment of the economic impact on the bee and agricultural industries in the Western Cape of the clearing of certain Eucalyptus species. Agricultural Research Council, StellenboschGoogle Scholar
  2. Avarind NA, Dinesh R, Ganeshaiah KN, Shaanker RU, Poulsen JG (2010) Impact of invasive plant, Lantana camara, on bird assemblages at Male Mahadeshwara Reserve forest, South India. Trop Ecol 51:325–338Google Scholar
  3. Bibby CJ, Burgess ND, Hill DA, Mustoe SH (2000) Bird census techniques, 2nd edn. Academic Press, LondonGoogle Scholar
  4. Brown JH, Morgan ESK, Parody JM, Haskell JP (2001) Regulation of diversity: maintenance of species richness in changing environments. Oecologia 126:321–332CrossRefPubMedGoogle Scholar
  5. Burnett RD, Gardali T, Geupel GR (2005) Using songbird monitoring to guide and evaluate riparian restoration in salmonid-focused stream rehabilitation projects. General Technical Report. PSW–GTR–191Google Scholar
  6. Carnie T (2015). To fell or not to fell. The Mercury. http://www.iol.co.za/scietech/science/environment/to-fell-or-not-to-fell-1.1825726. Accessed 19 Feb 2015
  7. Cilliers SS, Siebert SJ (2012) Urban ecology in Cape Town: South African comparisons and reflections. Ecol Soc 17:33CrossRefGoogle Scholar
  8. Clarke KR, Gorley RN (2006) Primer v6 user manual/tutorial. Primer-E Ltd, PlymouthGoogle Scholar
  9. Coetzee BWT, le Roux PR, Chown SL (2013) Scale effects on the body size frequency distributions of African birds: patterns and potential mechanisms. Glob Ecol Biogeogr 22:380–390CrossRefGoogle Scholar
  10. de Villiers S (2007) The deteriorating nutrient status of the Berg River, South Africa. Water SA 33:1–6Google Scholar
  11. Dean WRJ, Anderson MD, Milton SJ, Anderson TA (2002) Avian assemblages in native Acacia and alien Prosopis drainage line woodland in the Kalahari, South Africa. J Arid Environ 51:1–19CrossRefGoogle Scholar
  12. Dobson AP, Bradshaw AD, Baker AJM (1997) Hopes for the future: restoration ecology and conservation biology. Science 277:515–522CrossRefGoogle Scholar
  13. Dures SG, Cumming GS (2010) The confounding influence of homogenizing invasive species in a globally endangered and largely urban biome: does habitat quality dominate avian biodiversity? Biol Conserv 143:768–777CrossRefGoogle Scholar
  14. Dzikiti S, Gush MB, Le Maitre DC, Maherry A, Jovanovic NZ, Ramoelo A, Cho MA (2016) Quantifying potential water savings from clearing invasive alien Eucalyptus camaldulensis using in situ and high resolution remote sensing data in the Berg River Catchment, Western Cape, South Africa. For Ecol Manag 361:69–80CrossRefGoogle Scholar
  15. Ewbank DA (2000) Remarks on the use of exotic woodlands by birds in Zimbabwe. Honeyguide 46:40–41Google Scholar
  16. Forsyth GG, Richardson DM, van Wilgen BW (2004) A rapid assessment of the invasive status of Eucalyptus species in two South African provinces. S Afr J Sci 100:75–77Google Scholar
  17. Fraser T, Crowe MW (1990) Effects of alien woody plant invasion on the birds of Mountain Fynbos in the Cape of Good Hope Nature Reserve. S Afr J Zool 25:97–108CrossRefGoogle Scholar
  18. Geerts S, Pauw A (2009a) Hyper-specialization for long-billed bird pollination in a guild of South African plants: the malachite sunbird pollination syndrome. S Afr J Bot 75:699–706CrossRefGoogle Scholar
  19. Geerts S, Pauw A (2009b) African sunbirds hover to pollinate an invasive hummingbird-pollinated plant. Oikos 118:573–579CrossRefGoogle Scholar
  20. Geerts S, Malherbe SDT, Pauw A (2011) Reduced flower visitation by nectar-feeding birds in response to fire in the Cape fynbos vegetation, South Africa. J Ornithol 153:297–301CrossRefGoogle Scholar
  21. Geerts S, Moodley D, Gaertner M, Le Roux J, McGeoch MA, Muofhe C, Richardson DM, Wilson JRU (2013) The absence of fire can cause a lag phase: the invasion dynamics of Banksia ericifolia (Proteaceae). Austral Ecol 38:931–941CrossRefGoogle Scholar
  22. Geldenhuys CJ (2008). Practical guidelines for the rehabilitation of forest-related streambank vegetation with removal of invader plant stands along the Berg River, Western Cape. Working for Water Report (FW–02/08), South AfricaGoogle Scholar
  23. Gerber EE, Krebs C, Murrell C, Moretti M, Rocklin R, Schaffner U (2008) Exotic invasive knotweeds (Fallopia spp.) negatively affect native plant and invertebrate assemblages in European riparian habitats. Biol Conserv 141:646–654CrossRefGoogle Scholar
  24. Gotelli NJ, Colwell RK (2001) Quantifying biodiversity: procedures and pitfalls in the measurement and comparison of species richness. Ecol Lett 4:379–391CrossRefGoogle Scholar
  25. Grass I, Berens DG, Farwig N (2013) Guild-specific shifts in visitation rates of frugivores with habitat loss and plant invasion. Oikos 123:575–582CrossRefGoogle Scholar
  26. Greenwood H, O’Dowd DJ, Lake PS (2004) Willow (Salix x rubens) invasion of the riparian zone in South-Eastern Australia: reduced abundance and altered composition of terrestrial arthropods. Divers Distrib 10:485–492CrossRefGoogle Scholar
  27. Greve M, Chown SL, van Rensburg BJ, Dallimer M, Gaston KJ (2011) The ecological effectiveness of protected areas: a case study for South African birds. Anim Conserv 14:295–305CrossRefGoogle Scholar
  28. Grey MA, Baldauf SL, Peter J, Mayhew PJ, Hill JK (2007) The response of avian feeding guilds to tropical forest disturbance. Conserv Biol 21:133–141CrossRefGoogle Scholar
  29. Hajzlerova L, Reif J (2014) Bird species richness and abundance in riparian vegetation invaded by exotic Reynoutria species. Biologia 69:247–253CrossRefGoogle Scholar
  30. Hammer Ø, Harper DAT, Ryan PD (2001) PAST: paleontological statistics software package for education and data analysis. Natural History Museum, OsloGoogle Scholar
  31. Hejda M, Pyšek P (2006) What is the impact of Impatiens glandulifera on species diversity of invaded riparian vegetation? Biol Conserv 132:143–152CrossRefGoogle Scholar
  32. Hejda M, Pyšek P, Jarosik V (2009) Impact of invasive plants on the species richness, diversity and composition of invaded communities. J Ecol 97:393–403CrossRefGoogle Scholar
  33. Hockey PAR, Dean WRJ, Ryan P (2005) Robert’s birds of southern Africa, 7th edn. Trustees of the J. Voelcker Bird Book Fund, Cape TownGoogle Scholar
  34. Holland-Clift S, O’Dowd DJ, Mac Nally R (2011) Impacts of an invasive willow (Salix x rubens) on riparian bird assemblages in South-Eastern Australia. Austral Ecol 36:511–520CrossRefGoogle Scholar
  35. Jacquemyn H, Van Looy K, Breyne P, Honnay O (2010) The Meuse River as a corridor for range expansion of the exotic plant species Sisymbium austriacum: evidence for long-distance seed dispersal. Biol Invasions 12:553–561CrossRefGoogle Scholar
  36. James FC, Shugart HH Jr (1970) A quantitative method of habitat description. Audubon 24:727–736Google Scholar
  37. Johannsmeier MF, Mostert AJM (2001). South African nectar and pollen flora. In: Johannsmeier MF (ed) Beekeeping in South Africa, 3rd edn. Plant Protection Research Institute Handbook no. 14. Plant Protection Research Institute, Pretoria. pp 127–148Google Scholar
  38. Kerr TF, Ruwanza S (2016) Does Eucalyptus grandis invasion and removal affect soils and vegetation in the Eastern Cape Province, South Africa? Austral Ecol 41:328–338CrossRefGoogle Scholar
  39. Le Maitre DC, Gaertner M, Marchante E, Ens E, Holmes PM, Pauchard A, O’Farrell PJ, Rogers AM, Blanchard R, Blignaut J, Richardson DM (2011) Impacts of invasive Australian acacias: implications for management and restoration. Divers Distrib 17:1015–1029CrossRefGoogle Scholar
  40. Le Roux JJ, Geerts S, Ivey P, Krauss S, Richardson DM, Suda J, Wilson JRU (2010) Molecular systematics and ecology of invasive Kangaroo Paws in South Africa: management implications for a horticulturally important genus. Biol Invasions 12:3989–4002CrossRefGoogle Scholar
  41. Macdonald IAW, Richardson DM, Powrie FJ (1986) Range expansion of the hadeda ibis Bostrychia hagedash in Southern Africa. S Afr J Zool 21:331–342CrossRefGoogle Scholar
  42. Magurran AE (2004) Measuring biological diversity. Blackwell, OxfordGoogle Scholar
  43. Melin A, Rouget M, Midgley JJ, Donaldson JS (2014) Pollination ecosystem services in South African agricultural systems. S Afr J Sci 110:1–9CrossRefGoogle Scholar
  44. Mucina L, Rutherford MC (2006) The vegetation of South Africa, Lesotho and Swaziland. Strelitzia 19. South African National Biodiversity Institute, PretoriaGoogle Scholar
  45. Naiman RJ, Decamps H (1997) The ecology of interfaces: riparian zones. Annu Rev Ecol Syst 28:621–658CrossRefGoogle Scholar
  46. Planty-Tabacchi A, Tabacchi E, Naiman RJ, Deferrari C, Decamps H (1996) The invisibility of species rich communities in riparian zones. Conserv Biol 10:598–607CrossRefGoogle Scholar
  47. Polo V, Carrascal LM (1999) Shaping the body mass distribution of Passeriformes: habitat use and body mass are evolutionarily and ecologically related. J Anim Ecol 68:324–337CrossRefGoogle Scholar
  48. Procheś S, Wilson JRU, Richardson DM, Chown SL (2008) Herbivores, but not other insects, are scarce on alien plants. Austral Ecol 33:691–700CrossRefGoogle Scholar
  49. R Core Team (2012) R: A language and environment for statistical computing. R Foundation for Statistical Computing, ViennaGoogle Scholar
  50. Richardson DM, van Wilgen BW (2004) Invasive alien plants in South Africa: how well do we understand the ecological impacts? S Afr J Sci 100:45–52Google Scholar
  51. Richardson DM, Cambray JA, Chapman RA, Dean WRJ, Griffiths CL, Le Maitre DC, Newton DJ, Winstanley T (2003) Vectors and pathways of biological invasions in South Africa – Past, future and present. In: Invasive species: vectors and management strategies. Island, Washington, DC, pp 292–349Google Scholar
  52. Richardson DM, Holmes PM, Esler KJ, Galatowitsch SM, Stromberg JC, Kirkman SP, Pyšek Hobbs RJ (2007) Riparian vegetation: degradation, alien plant invasions and restoration prospects. Divers Distrib 13:126–129CrossRefGoogle Scholar
  53. Robinson CT, Tockner K, Ward JV (2002) The fauna of dynamic riverine landscapes. Freshw Biol 47:661–667CrossRefGoogle Scholar
  54. Rogers AM, Chown SL (2013) Novel ecosystems support substantial avian assemblages: the case of invasive alien Acacia thickets. Divers Distrib 20:34–45CrossRefGoogle Scholar
  55. Samways MJ, Caldwell PM, Osborne R (1996) Ground-living invertebrate assemblages in native, planted and invaded vegetation in South Africa. Agric Ecosyst Environ 59:19–32CrossRefGoogle Scholar
  56. Schwartz MV, Thorne JH, Viers JH (2006) Biotic homogenization of the California flora in urban and urbanizing regions. Biol Conserv 127:282–291CrossRefGoogle Scholar
  57. Schwarzenberger A, Dean WRJ (2003) The influence of vegetation structure on bird communities in a Karoo village, South Africa. Ostrich 74:209–216CrossRefGoogle Scholar
  58. Shanahan SA, Nelson SM, Van Doormolen DM, Eckberg JR (2011) Restoring habitat for riparian birds in the lower Colorado River watershed: an example from the Las Vegas Wash, Nevada. J Arid Environ 75:1182–1190CrossRefGoogle Scholar
  59. Simberloff D, Nuñez MA, Ledgard NJ, Pauchard A, Richardson DM, Sarasola M, van Wilgen BW, Zalba SM, Zenni SR (2010) Spread and impact of introduced conifers in South America: lessons from other southern hemisphere regions. Austral Ecol 35:489–504CrossRefGoogle Scholar
  60. Sogge MK, Sferra SJ, Paxton EH (2008) Tamarix as Habitat for Birds: implications for riparian restoration in the South-western United States. Restor Ecol 16:146–154CrossRefGoogle Scholar
  61. StatSoft Inc (2015) Statistica version 12. Statsoft Inc., TulsaGoogle Scholar
  62. Suddjian DL (2004) Birds and Eucalyptus on the Central California Coast: A love–hate relationship. Unpublished conference notesGoogle Scholar
  63. Symes CT, Wirminghaus JO, Downs CT (2002) Species richness and seasonality of forest avifauna in three South African afromontane forests. Ostrich 73:106–113CrossRefGoogle Scholar
  64. Tererai F, Gaertner M, Jacobs SM, Richardson DM (2013) Eucalyptus invasions in riparian forests: effects on native vegetation community diversity stand structure and composition. For Ecol Manag 297:84–93CrossRefGoogle Scholar
  65. Thorpe JD (2013) Avifaunal community recovery rates post alien Acacia clearing on the West Coast of South Africa. Dissertation, Cape Peninsula University of Technology, Cape Town, South AfricaGoogle Scholar
  66. van Rensburg BJ, Peacock DS, Robertson MP (2009) Biotic homogenization and alien bird species along an urban gradient in South Africa. Landsc Urban Plan 92:233–241CrossRefGoogle Scholar
  67. van Wilgen BW (2009) The evolution of fire and invasive alien plant management practices in fynbos. S Afr J Sci 105:335–342Google Scholar
  68. van Wilgen BW (2012) Evidence, perceptions and trade-offs associated with invasive alien plant control in the Table Mountain National Park, South Africa. Ecol Soc 17:23Google Scholar

Copyright information

© The Ecological Society of Japan 2017

Authors and Affiliations

  1. 1.Department of Conservation and Marine SciencesCape Peninsula University of TechnologyCape TownSouth Africa
  2. 2.Centre for Invasion Biology, Department of Botany and ZoologyStellenbosch UniversityStellenboschSouth Africa

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