Consistency in the habitat degree of invasion for three invasive plant species across Mediterranean islands
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Abstract
Habitats are known to vary in their vulnerability to invasion by alien plants and different species often colonise distinct habitats. To assess the consistency in the degree of invasion of particular habitats, this study examined the frequency of occurrence and local abundance of three invasive plant taxa: Ailanthus altissima, Carpobrotus spp., and Oxalis pes-caprae across different habitat types on four representative Mediterranean islands. We conducted systematic field surveys recording the presence-absence and cover of these taxa on the islands of Mallorca, Corsica, Sardinia and Crete. Drawing on the results of 5,285 sample points, the frequency of occurrence of the three invaders tends to be higher than expected in urban, ruderal and roadside habitats. In contrast, scrub habitats rarely contain any of the three invaders, indicating that they may be more resistant to invasion. The degree of invasion, determined by the local abundance of an invasive plant in any one habitat, varies according to the identity of the invader and the island. However, based on average abundance, Oxalis pes-caprae exhibits the highest degree of invasion, and Carpobrotus spp. the least. There is no indication that any one of the four islands is more prone to either higher frequencies or abundances of the three invaders. These patterns suggest that anthropogenic changes in Mediterranean islands will increase the vulnerability of certain habitats to invasion and increase the distribution of these three invasive taxa at any of the four islands.
Keywords
Alien Exotic Habitat invasibility Risk assessment Species abundance WeedsNotes
Acknowledgments
We thank S. Pacciardi, E. Vidal, F. Médail, I. Gimeno, M.C. De la Bandera, and E. Moragues for field assistance, and two anonymous reviewers for comments on an earlier version of the manuscript. This study is part of EPIDEMIE (Exotic Plant Invasions: Deleterious Effects on Mediterranean Island Ecosystems) a research project supported by the European Commission under the 5th Framework, contributing to the implementation of Key Action 2.2.1 (Ecosystem Vulnerability) within the Energy, Environment and Sustainable Development thematic programme (Contract no. EVK2-CT-2000-00074). Further details of the project and the data bank can be found at www.ceh.ac.uk/epidemie. This work is also supported by INVABIO (Ministère de l’Ecologie et du Développement Durable, subvention no. 01113), the National Park of Port-Cros (contract no. 97.029.83400), the National Science Foundation Graduate Research Fellowship to C.M.S. and the Spanish Ministry of Science and Innovation projects MONTES and RIXFUTUR to M.V.
References
- Andrés C, Ojeda F (2002) Effects of afforestation with pines on woody plant diversity of Mediterranean heathlands in southern Spain. Biodivers Conserv 11:1511–1520CrossRefGoogle Scholar
- Basnou C, Vilà M (2009) Ailanthus altissima (Mill.) Swingle, tree of heaven (Simaroubaceae, Magnoliophyta). In: DAISIE (ed) Handbook of alien species in Europe. Springer, Dordrecht, p 342Google Scholar
- Blondel J, Aronson J (1999) Biology and wildlife of the mediterranean region. Oxford University Press, OxfordGoogle Scholar
- Botham MS, Rothery P, Hulme PE, Hill MO, Preston CD, Roy DB (2009) Do urban areas act as foci for the spread of alien plant species? An assessment of temporal trends in the UK. Divers Distrib 15:338–345CrossRefGoogle Scholar
- Bourgeois K, Suehs CM, Vidal E, Médail F (2005) Invasional meltdown potential: facilitation between introduced plants and mammals on French Mediterranean islands. Écoscience 12:248–256CrossRefGoogle Scholar
- Cadotte MW, Lovett-Doust J (2001) Ecological and taxonomic differences between native and introduced plants of southwestern Ontario. Écoscience 8:230–238Google Scholar
- Chytrý M, Maskel LC, Pino J, Pysek P, Vilà M, Font X, Smart SM (2008a) Habitat invasions by alien plants: a quantitative comparison between Mediterranean, subcontinental and oceanic regions of Europe. J Appl Ecol 45:448–458CrossRefGoogle Scholar
- Chytrý M, Jarošík M, Pyšek P, Hájek O, Knollová O, Tichý L, Danihelka J (2008b) Separating habitat invasibility by alien plants from the actual level of invasion. Ecology 89:1541–1553CrossRefPubMedGoogle Scholar
- Chytrý M, Pyšek P, Wild J, Pino J, Maskell LC, Vilà M (2009) European map of alien plant invasions based on the quantitative assessment across habitats. Divers Distrib 15:98–107CrossRefGoogle Scholar
- Cody ML (1986) Diversity, rarity, and conservation in Mediterranean-climate regions. In: Soule ME (ed) Conservation biology: the science of scarcity and diversity. Sinauer, Sunderland, pp 122–152Google Scholar
- Courchamp F, Chapuis J-L, Pascal M (2003) Mammal invaders on islands: impact, control and control impact. Biol Rev 78:347–383CrossRefPubMedGoogle Scholar
- D’Antonio CM, Odion DC, Tyler CM (1993) Invasion of maritime chaparral by the introduced succulent Carpobrotus edulis. Oecologia 95:14–21Google Scholar
- DAISIE (2009) Handbook of alien species in Europe. Springer, DordrechtGoogle Scholar
- De Feo V, De Martino L, Quaranta E, Pizza C (2003) Isolation of phytotoxic compounds from Tree-of-Heaven (Ailanthus altissima Swingle). J Agric Food Chem 51:1177–1180CrossRefPubMedGoogle Scholar
- Delipetrou P (2009) Carpobrotus edulis (L.) N.E.Br, freeway ice plant (Aizoaceae, Magnoliophyta). In: DAISIE (ed) Handbook of alien species in Europe. Springer, Dordrecht, p 345Google Scholar
- Deutschewitz K, Lausch A, Kühn I, Klotz S (2003) Native and alien plant species richness in relation to spatial heterogeneity on a regional scale in Germany. Glob Ecol Biogeogr 12:299–311CrossRefGoogle Scholar
- Elton C (1958) The ecology of invasions by animals and plants. Methuen, LondonGoogle Scholar
- Gimeno I, Vilà M, Hulme PE (2006) Are islands more susceptible to plant invasion than continents? A test using Oxalis pes-caprae in the western Mediterranean. J Biogeogr 33:1559–1565CrossRefGoogle Scholar
- Gritti ES, Smith B, Sykes MT (2006) Vulnerability of Mediterranean basin ecosystems to climate change and invasion by exotic plant species. J Biogeogr 33:145–157CrossRefGoogle Scholar
- Heisey RM, Heisey TK (2003) Herbicidal effects under field conditions of Ailanthus altissima bark extract, which contains ailanthone. Plant Soil 256:85–99CrossRefGoogle Scholar
- Heywood VH (1995) The Mediterranean flora in the context of world biodiversity. Ecologia Mediterranea 21:11–18Google Scholar
- Hulme PE (2004) Islands, invasions and impacts: a Mediterranean perspective. In: Fernández-Palacios JM, Morici C (eds) Ecologia insular/island ecology, Associaciòn Espanola de Ecologia Terrestre (AEET) Cabildo Insular de la Palma, Spain, pp 359–383Google Scholar
- Hulme PE (2009a) Relative roles of life-form, land use and climate in recent dynamics of alien plant distributions in the British Isles. Weed Res 49:19–28CrossRefGoogle Scholar
- Hulme PE (2009b) Trade, transport and trouble: managing invasive species pathways in an era of globalisation. J Appl Ecol 46:10–18CrossRefGoogle Scholar
- Hulme PE, Brundu G, Camarda I, Dalias P, Lambdon P, Lloret F, Médail F, Moragues E, Suehs CM, Traveset A, Troumbis A, Vilà M (2008) Assessing the risks to Mediterranean islands ecosystems from alien plant introductions. In: Tokarska-Guzik B, Brock JH, Brundu G, Child L, Daehler CC, Pyšek P (eds) Plant invasions: human perception, ecological impacts and management. Backhuys Publishers, Leiden, pp 39–56Google Scholar
- Kowarik I (1995) Clonal growth in Ailanthus altissima on a natural site in West Virginia. J Veg Sci 6:853–856CrossRefGoogle Scholar
- Lambdon PW (2009) Oxalis pes-caprae L. Bermuda buttercup (Oxalidaceae, Magnoliophyta). In: DAISIE (ed) Handbook of alien species in Europe. Springer, Dordrecht, p 353Google Scholar
- Lambdon PW, Lloret F, Hulme PE (2008) Do alien plants on Mediterranean islands tend to invade different niches from native species? Biol Invasions 10:703–716CrossRefGoogle Scholar
- Lloret F, Médail F, Brundu G, Hulme PE (2004) Local and regional abundance of exotic plant species on Mediterranean islands: are species traits important? Glob Ecol Biogeogr 13:37–45CrossRefGoogle Scholar
- Loope LL, Mueller-Dombois D (1989) Characteristics of invaded islands, with special reference to Hawaii. In: Drake JA, Mooney HA, di Castri F, Groves RH, Kruger FJ, Rejmanek M, Williamson M (eds) Biological invasions: a global perspective. Wiley, Chichester, pp 257–280Google Scholar
- MacDonald IAW, Cooper J (1995) Insular lessons for global biodiversity conservation with particular reference to alien invasions. In: Vitousek PM, Loope LL, Adsersen H (eds) Islands: biological diversity and ecological function. Springer, Berlin, pp 189–203Google Scholar
- Manly BFJ (1997) Randomization, bootstrap and Monte Carlo methods in biology, 2nd edn. Chapman & Hall, LondonGoogle Scholar
- Marvier M, Kareiva PM, Neubert MG (2004) Habitat destruction, fragmentation, and disturbance promote invasion by habitat generalists in a multispecies metapopulation. Risk Anal 24:869–878CrossRefPubMedGoogle Scholar
- Médail F, Quézel P (1997) Hot-spots analysis for conservation of plant biodiversity in the Mediterranean Basin. Ann Missouri Bot Gard 84:112–127CrossRefGoogle Scholar
- O’Farrell PJ, Milton SJ (2006) Road verge and rangeland plant communities in the southern Karoo: exploring what influences diversity, dominance and cover. Biodivers Conserv 15(3):921–938CrossRefGoogle Scholar
- Ohlemüller R, Walker S, Wilson JB (2006) Local vs regional factors as determinants of the invasibility of indigenous forest fragments by alien plant species. Oikos 112:493–501CrossRefGoogle Scholar
- Pino J, Font X, Carbó J, Jové M, Pallarès L (2005) Large-scale correlates of alien plant invasion in Catalonia (NE of Spain). Biol Conserv 122:339–350CrossRefGoogle Scholar
- Planty-Tabacchi A-M, Tabacchi E, Naiman RJ, Deferrari C, Decamps H (1996) Invasibility of species-rich communities in riparian zones. Conserv Biol 10:598–607CrossRefGoogle Scholar
- Pütz N (1994) Vegetative spreading of Oxalis pes-caprae (Oxalidaceae). Plant Syst Evol 191:57–67CrossRefGoogle Scholar
- Pyšek P, Jarosík V (2005) Residence time determines the distribution of alien plants. In: Inderjit S (ed) Invasive plants: ecological and agricultural aspects. Birkhäuser Verlag, Switzerland, pp 77–96Google Scholar
- Pyšek P, Pyšek A (1995) Invasion by Heracleum mantegazzianum in different habitats in the Czech Republic. J Veg Sci 6:711–718CrossRefGoogle Scholar
- Pyšek P, Bacher S, Chytrý M, Jarošík V, Wild J, Celesti-Grapow L, Gasso N, Kenis M, Lambdon PW, Nentwig W, Pergl J, Roques A, Sádlo J, Solarz W, Vilà M, Hulme PE (in press) Contrasting patterns in the invasions of European terrestrial and freshwater habitats by alien plants, insects and vertebrates. Glob Ecol BiogeogrGoogle Scholar
- R Development Core Team (2008) R: a language and environment for statistical computing. R Foundation for Statistical Computing, Vienna. ISBN 3-900051-07-0, URL http://www.R-project.org
- Rich T, Rabane M, Fasham M, McMeechan F, Dobson D (2005) Ground and shrub vegetation. In: Hill D, Fasham M, Tucker G, Shewry M, Shaw P (eds) Handbook of biodiversity methods—survey, evaluation and monitoring. Cambridge University Press, Cambridge, pp 201–221Google Scholar
- Ross LC, Lambdon PW, Hulme PE (2008) Disentangling the roles of climate, propagule pressure and land use on the current and potential elevational distribution of the invasive weed Oxalis pes-caprae L. on Crete. Perspect Plant Ecol Evol Syst 10:251–258CrossRefGoogle Scholar
- Sax DF, Gaines SD (2008) Species invasions and extinction: the future of native biodiversity on islands. Proc Natl Acad Sci 105(Suppl. 1):11490–11497CrossRefPubMedGoogle Scholar
- Sokal RR, Rohlf FJ (1995) Biometry, 3rd edn. Freeman and Company, New YorkGoogle Scholar
- Suehs CM, Médail F, Affre L (2001) Ecological and genetic features of the invasion by the alien Carpobrotus plants in Mediterranean island habitats. In: Brundu G, Brock J, Camarda L, Child L, Wade M (eds) Plant invasions: species ecology and ecosystem management. Backhuys Publishers, Leiden, pp 145–158Google Scholar
- Suehs CM, Affre L, Médail F (2004a) Invasion dynamics of two alien Carpobrotus (Aizoaceae) taxa on a Mediterranean island: I. Genetic diversity and introgression. Heredity 92:31–40CrossRefPubMedGoogle Scholar
- Suehs CM, Affre L, Médail F (2004b) Invasion dynamics of two alien Carpobrotus (Aizoaceae) taxa on a Mediterranean island: II. Reproductive strategies. Heredity 92:550–556CrossRefPubMedGoogle Scholar
- Traveset A, Brundu G, Carta M, Mprezetou I, Lambdon P, Manca M, Médail F, Moragues E, Rodriguez-Perez J, Siamantziouras S, Suehs CM, Troumbis A, Vilà M, Hulme PE (2008) Consistent performance of invasive plant species within and among islands of the Mediterranean basin. Biol Invasions 10:847–858CrossRefGoogle Scholar
- Vilà M, D’Antonio CM (1998) Hybrid vigor in Carpobrotus in coastal California: effects of herbivory and water availability on clonal growth. Ecol Appl 8:1196–1205Google Scholar
- Vilà M, Muñoz I (1999) Patterns and correlates of exotic and endemic plant taxa in the Baleric islands. Ecologia Mediterranea 25:153–161Google Scholar
- Vilà M, Pujadas J (2001) Land-use and socio-economic correlates of plant invasions in European and North African countries. Biol Conserv 100:397–401CrossRefGoogle Scholar
- Vilà M, Tessier M, Suehs CM, Brundu G, Carta L, Galanidis A, Lambdon P, Manca M, Médail F, Moragues E, Traveset A, Troumbis A, Hulme PE (2006) Local and regional assessments of the impacts of plant invaders on vegetation structure and soil properties of Mediterranean islands. J Biogeogr 33:853–861CrossRefGoogle Scholar
- Vilà M, Pino J, Font X (2007) Regional assessment of plant invasions across different habitat types. J Veg Sci 18:35–42CrossRefGoogle Scholar
- Vilà M, Siamantziouras A, Brundu G, Camarda I, Lambdon P, Médail F, Moragues E, Suehs CM, Traveset A, Troumbis AY, Hulme PE (2008) Widespread resistance of Mediterranean island ecosystems to the establishment of three alien species. Divers Distrib 14:839–851CrossRefGoogle Scholar
- Wisura W, Glen HF (1993) The South African species of Carpobrotus (Mesembryanthema—Aizoaceae). Contrib Bolus Herb 15:76–107Google Scholar