Abstract
A random survey of non-indigenous plants was performed on the nine islands of the Azores Archipelago, including 529 one square km plots, corresponding to about 20% of the land surface. The number of sampling plots varied from 12 for Corvo Island to 136 for São Miguel, while the number of sampled taxa per island varied between 152 and 365. The percentage of non-indigenous taxa was lowest for Corvo, Flores, and São Jorge (below 60%), and highest for Graciosa (above 70%), with intermediate values for the remaining islands (63–68%). The majority of the sampled taxa were Dicotyledoneae (above 60%) and Monocotyledoneae (20%) with lower percentages of Pteridophyta and Gymnospermae. Therophytes, hemicryptophytes and camaephytes were the most common life forms. The 30 most important non-indigenous plants in the Archipelago and per island showed some differences among islands. Their habitats ranged from anthropic to native vegetation. The proportion of non-indigenous taxa was positively correlated with several descriptors associated with human activities, but negatively correlated with altitude and slope.
Similar content being viewed by others
References
R. Anderson D. Gardner (1996) ArticleTitlePreliminary evaluation of Pseudomonas solanacearum as a potential biological control agent of the alien weed kahili ginger (Hedychium gardnerianum) in Hawaiian forest Newslett. Hawaiian Bot. Serv. 35 3–6
R. Anderson D. Gardner (1999) ArticleTitleAn evaluation of the wilt-causing bacteria Ralstonia solanacearum as a potential biological control agent of the alien weed kahili ginger (Hedychium gardnerianum) in Hawaiian forest Biol. Control 15 89–96 Occurrence Handle10.1006/bcon.1999.0705
M.G. Barbour J.H. Burk W.D. Pitts (1987) Terrestrial Plant Ecology The Benjamin/Cummings Publishing Company California 634
G.P. Bell (1997) Ecology and management of Arundo donaxapproaches to riparian habitat restoration in southern California J.H. Brock M. Wade P. Pysek D. Green (Eds) Plant Invasions: Studies from North America and Europe Backhuys Publishers Leiden 103–113
C.J. Bibby T.D. Charlton (1991) ArticleTitleObservations on the San Miguel Bullfinch Açoreana 7 297–304
J. Byrne (1992) ArticleTitleWild ginger: aggressive invader of New Zealand’s native forests Horticult. New Zealand 3 10–14
A. Cabral (1953) ArticleTitleSebes vivas ou abrigos, nos Açores – Subsídios para o seu estudo Boletim da Comissão Reguladora dos Cereais, Açores 17 61–82
C.B. Cronk J.L. Fuller (1995) Plant Invaders Chapman & Hall London 241
J.L. Diamantino (1999) Inventáriodistribuição e evidências da adaptabilidade de algumas invasoras lenhosas da Reserva Biogenética do Planalto Central da Serra da Estrela M.E. Rocha M. Esteves (Eds) Actas do Primeiro EncontroInvasoras Lenhosas, 16–18 de Novembro de 1999, Gerês Sociedade Portuguesa de Ciências Florestais ADERE 51–57
Dias E. 1996. Vegetação natural dos Açores. PhD Thesis, Universidade dos Açores, Angra do Heroísmo, 302 pp.
J.M. DiTomaso (1998) ArticleTitleImpactbiology, and ecology of saltcedarTamarix spp. in the southwestern United States Weed Technol. 12 326–336
M.D. Espírito-Santo P. Arsénio (1999) O género Hakea Schrad. em Portugal M.E. Rocha M. Esteves (Eds) Actas do Primeiro EncontroInvasoras Lenhosas, 16–18 de Novembro de 1999, Gerês Sociedade Portuguesa de Ciências Florestais ADERE 58–65
A. Fernandes R.B. Fernandes (1980) Iconographia selecta Flora Azoricae Fasc. I Secretaria Regional da Cultura Região Autónoma dos Açores 131
A. Fernandes R.B. Fernandes (1983) Iconographia selecta Flora Azoricae. Fasc. II Secretaria Regional da Cultura Região Autónoma dos Açores 132–285
A. Fernandes R.B. Fernandes (1987) Iconographia selecta Flora Azoricae. Vol. II, Fasc. I Secretaria Regional da Cultura Região Autónoma dos Açores 1–179
L.G. Firbank N.E. Ellis M.O. Hill A.J. Lockwood R.D. Swetnam (1998) ArticleTitleMapping the distribution of weeds in Great Britain in relation to national survey data and to soil type Weed Res. 33 1–10 Occurrence Handle10.1046/j.1365-3180.1998.00066.x
Franco J.A. 1971. Nova Flora de Portugal, Vol. I. Lisboa, 648 pp.
Franco J.A. 1984. Nova Flora de Portugal, Vol. II. Lisboa, 660 pp.
J.A. Franco M.R. Afonso (1994) Nova Flora de Portugal NumberInSeriesVol. III(I) Escolar Editora Lisboa 181
JA Franco M.R. Afonso (1998) Nova Flora de Portugal NumberInSeriesVol. III(II) Escolar Editora Lisboa 283
G.M. Gleadow D.H. Ashton (1981) ArticleTitleInvasion by Pittosporum undulatum of the Forests of Central Victoria. I Invasion patterns and plant morphology Aust. J. Bot. 29 705–720 Occurrence Handle10.1071/BT9810705
T.J. Goodland R. Healey (1996) The invasion of Jamaican montane rainforests by the Australian tree Pittosporum undulatum School of Agricultural and Forest Sciences, University of Wales Bangor 54
L.C. Grapow C. Blasi (1998) ArticleTitleA comparison of the urban flora of different phytoclimatic regions in Italy Global Ecol. Biogeogr. Lett. 7 367–378 Occurrence Handle10.1046/j.1466-822x.1998.00304.x
P. Greig-Smith (1983) Quantitative Plant Ecology EditionNumber3 Blackwell Scientific Publications Oxford 359
A. Henderson (1995) Plant invaders of Southern Africa Agricultural Research Council Pretoria 177
R.D. Hiebert (1997) Prioritizing invasive plants and planning for management J.O. Luken J.W. Thieret (Eds) Assessment and Management of Plant Invasions Springer New York 195–212
L. Holm J.V. Pancho J.P Herberger D.L. Plucknett (1979) A Geographical Atlas of World Weeds John Wiley & Sons New York 391
K.A. Kershaw J.H.H. Looney (1985) Quantitative and Dynamic Plant Ecology EditionNumber3 Edward Arnold Victoria 282
D.C. Le Maitre D.M. Richardson R.A. Chapman (2004) ArticleTitleAlien plant invasions in South Africa: driving forces and the human dimension S. Afr. J. Sci. 100 103–112
M. Liberal M. Esteves (1999) Invasão de Acacia dealbata Link no Parque Nacional da Peneda-Gerês M.E. Rocha M. Esteves (Eds) Actas do Primeiro EncontroInvasoras Lenhosas, 16–18 de Novembro de 1999, Gerês Sociedade Portuguesa de Ciências Florestais ADERE 99–103
P.T. Manders D.M. Richardson (1992) ArticleTitleColonization of Cape fynbos communities by forest species Forest Ecol. Manage. 48 277–293 Occurrence Handle10.1016/0378-1127(92)90150-8
P. Martins S. Ferreira M.M. Fernandes (1999) Inventário de focos de invasão de Acacia dealbata Link: contribuição para o delineamento de uma metodologia M.E. Rocha M. Esteves (Eds) Actas do Primeiro EncontroInvasoras Lenhosas, 16–18 de Novembro de 1999, Gerês Sociedade Portuguesa de Ciências Florestais ADERE 239–247
S.J. Milton W.R.J. Dean (1998) ArticleTitleAlien plant assemblages near roads in arid and semi-arid South Africa Divers. Distrib. 4 175–187 Occurrence Handle10.1046/j.1472-4642.1998.00024.x
B. Morton J.C. Britton A.M.F. Martins (1998) Ecologia costeira dos Açores Sociedade Afonso Chaves Ponta Delgada 249
J.L. Nel D.M. Richardson M. Rouget T.N. Mgidi N. Mdzeke D.C. Maitre ParticleLe B.W. Wilgen Particlevan L. Schonegevel L. Henderson S. Neser (2004) ArticleTitleA proposed classification of invasive alien plant species in South Africa: towards prioritizing species and areas for management action S. Afr. J. Sci. 100 53–64
R.T. Palhinha A.G. Cunha L.G. Sobrinho (1942) ArticleTitleAlgumas observações ecológicas sobre o Arquipélago Açoreano Boletim da Sociedade Portuguesa de Ciências Naturais 13 197–205
I.M. Parker D. Simberloff W.M. Lonsdale K. Goodell M. Wonham P.M. Kareiva M.H. Williamson V. Holle P.B. Moyle J.E. Byers L. Goldwasser (1999) ArticleTitleImpact: toward a framework for understanding the ecological effects of invaders Biol. Invasions 1 3–19 Occurrence Handle10.1023/A:1010034312781
L. Penacho A. Malveiro C. Machado (1999) Controlo da infestante Hedychium gardnerianum Sheppp. Ex Ker-G. Em povoamentos florestais na ilha de São Miguel – Açores M.E. Rocha M. Esteves (Eds) Actas do Primeiro EncontroInvasoras Lenhosas, 16–18 de Novembro de 1999, Gerês Sociedade Portuguesa de Ciências Florestais ADERE 214–218
J.R. Press M.J. Short (1994) Flora of Madeira The Natural History Museum London 574
C. Raunkjaer (1936) ArticleTitleThe life-form spectrum of some Atlantic Islands Botaniske Studier 1 251–270
J.C. Rodgers K.C. Parker (2003) ArticleTitleDistribution of alien plant species in relation to human disturbance on the Georgia Sea Islands Divers. Distrib. 9 385–398 Occurrence Handle10.1046/j.1472-4642.2003.00036.x
M. Rose L. Hermanutz (2004) ArticleTitleAre boreal ecosystems susceptible to alien plant invasion? Evidence from protected areas Oecologia 139 467–477 Occurrence Handle14997379 Occurrence Handle10.1007/s00442-004-1527-1
S. Rose (1997a) ArticleTitleIntegrating management of Pittosporum undulatum with other environmental weeds in Sidney’s urban bushland Pac. Conserv. Biol. 3 350–365
S. Rose (1997b) ArticleTitleInfluence of suburban edges on invasion of Pittosporum undulatum into the bushland of northern Sydney, Australia Aust. J. Ecol. 22 89–99
S. Rose P.G. Fairweather (1997) ArticleTitleChanges in floristic composition of urban bushland invaded by Pittosporum undulatum in Northern Sydney, Australia Aust. J. Bot. 45 123–149 Occurrence Handle10.1071/BT95058
G.L. Santos D. Kageler D.E. Gardner L. Cuddihy C.P. Stone (1992) Herbicidal control of selected alien plant species in Hawaii Volcanoes National Park C.P. Stone C.W. Smith J.T. Tunison (Eds) Alien Plant Invasions in Native Ecossystems of Hawaii – Management and Research University of Hawaii, Cooperative National Park Resources Study Unit Honolulu 341–375
Silva L. 2001. Plantas invasoras no Arquipélago dos Açores: caracterização geral e estudo de um caso – Clethra arborea Aiton. PhD thesis, Universidade dos Açores, Ponta Delgada, 514 pp.
L. Silva C.W. Smith (2004) ArticleTitleA characterization of the non-indigenous flora of the Azores Archipelago Biol. Invasions 6 193–204 Occurrence Handle10.1023/B:BINV.0000022138.75673.8c
L. Silva C.W. Smith J. Tavares (1999) Essays for the control of Clethra arborea and Pittosporum undulatum M.E. Rocha M. Esteves (Eds) Actas do Primeiro EncontroInvasoras Lenhosas, 16–18 de Novembro de 1999, Gerês Sociedade Portuguesa de Ciências Florestais ADERE 143–148
L. Silva J. Tavares A. Pena (1996) Ecological basis for the control of Gunnera tinctoriaMolina. Mirbel, Gunneraceae. in São Miguel Island H. Brown (Eds) Proceedings Second International Weed Control Congress Copenhagen, Denmark 25–28-June 1996 Department of Weed Control and Pesticide Ecology Flakkebjerg 233–239
L. Silva J. Tavares C.W. Smith (2000) ArticleTitleBiogeography of Azorean plant invaders Arquipélago – Life and Marine Sciences Sup. 2 Part A1 19–27
E. Sjögren (1973a) ArticleTitleRecent changes in the vascular flora and vegetation of the Azores Islands Memórias da Sociedade Broteriana 22 1–113
E. Sjögren (1973b) ArticleTitleVascular plants new to the Azores and to individual islands in the Archipelago Boletim do Museu Municipal do Funchal 124 94–120
J. Tassin J.N. Riviere (2003) ArticleTitleSpecies richness altitudinal gradient of invasive plants on Reunion Island (Mascareigne archipelagoIndian Ocean) Revue D’Ecologie – La Terre et la Vie 58 257–270
W. Trelease (1897) ArticleTitleBotanical observations on the Azores Annu. Rep. Miss. Bot. Garden 8 77–220 Occurrence Handle10.2307/2992160
T.G. Tutin V.H. Heywood N.A. Burges D.M. Moore D.H. Valentine S.M. Walters D.A. Webb (1964/80) Flora Europaea NumberInSeriesVol. 1–5 Cambridge University Press Cambridge
B. Valdés S. Talavera E. Fernández-Galiano (1987) Flora Vascular de Andalucía Occidental NumberInSeriesVol. 1–3 Ketres Editora S.A Barcelona
T. Vasconcelos P. Forte (1999) Germination and development of Ailanthus altissimaits implication on control M.E. Rocha M. Esteves (Eds) Actas do Primeiro EncontroInvasoras Lenhosas, 16–18 de Novembro de 1999, Gerês Sociedade Portuguesa de Ciências Florestais ADERE 222–225
P.A. Williams S.M. Timmins (1990) Weeds in New Zealand Protected Natural Areas: A Review for the Department of Conservation Department of Conservation Wellington 114
J.H. Zar (1996) Biostatistical Analysis EditionNumber3 Prentice Hall International London 662
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Silva, L., Smith, C.W. A Quantitative Approach to the Study of Non-indigenous Plants: An Example from the Azores Archipelago. Biodivers Conserv 15, 1661–1679 (2006). https://doi.org/10.1007/s10531-004-5015-z
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s10531-004-5015-z