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1984 56 1585 1601 Kalmar, A. and Currie, D.J. 2006. A global model of island biogeography. Global Ecol. Biogeogr

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Community Ecology
Authors: M. L. Allen, M. J. Farmer, J. D. J Clare, E. R. Olson, J. Van Stappen, and T. R. Van Deelen

. MacArthur , R.H. and E.O. Wilson . 1967 . The Theory of Island Biogeography . Princeton Univ. Press , Princeton . MacKenzie , D.I. , J.D. Nichols , J.A. Royle et al. 2006

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Community Ecology
Authors: G. Bacaro, S. Maccherini, A. Chiarucci, A. Jentsch, D. Rocchini, D. Torri, M. Gioria, E. Tordoni, S. Martellos, A. Altobelli, R. Otto, C. G. Escudero, S. Fernández-Lugo, J. M. Fernández-Palacios, and J. R. Arévalo

Invasion by alien plant species may be rapid and aggressive, causing erosion of local biodiversity. This is particularly true for islands, where natural and anthropogenic corridors promote the rapid spread of invasive plants. Although evidence shows that corridors may facilitate plant invasions, the question of how their importance in the spread of alien species varies along environmental gradients deserves more attention. Here, we addressed this issue by examining diversity patterns (species richness of endemic, native and alien species) along and across roads, along an elevation gradient from sea-level up to 2050 m a.s.l. in Tenerife (Canary Islands, Spain), at multiple spatial scales. Species richness was assessed using a multi-scale sampling design consisting of 59 T-transects of 150 m × 2 m, along three major roads each placed over the whole elevation gradient. Each transect was composed of three sections of five plots each: Section 1 was located on the road edges, Section 2 at intermediate distance, and Section 3 far from the road edge, the latter representing the “native community” less affected by road-specific disturbance. The effect of elevation and distance from roadsides was evaluated for the three groups of species (endemic, native and alien species), using parametric and non-parametric regression analyses as well as additive diversity partitioning. Differences among roads explained the majority of the variation in alien species richness and composition. Patterns in alien species richness were also affected by elevation, with a decline in richness with increasing elevation and no alien species recorded at high elevations. Elevation was the most important factor determining patterns in endemic and native species. These findings confirm that climate filtering reflected in varying patterns along elevational gradients is an important determinant of the richness of alien species (which are not adapted to high elevations), while anthropogenic pressures may explain the richness of alien species at low elevation.

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Haila, Y. 2002. A conceptual genealogy of fragmentation research: from island biogeography to landscape ecology. Ecol. Applications 12: 321-334. A conceptual genealogy of fragmentation research: from island biogeography to

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MacArthur, R. H. and E. O. Wilson. 1967. The Theory of Island Biogeography. Princeton University Press, Princeton. The Theory of Island Biogeography

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Abbot, I. 1983. The meaning of z in species/area regression and the study of species turnover in island biogeography. Oikos 41: 385–390. Abbot I

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: from island biogeography to landscape ecology. - Ecol. Applic. 12 : 321–333. Haila Y A conceptual genealogy of fragmentation research: from island biogeography to landscape ecology

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E. O. Wilson 1967 The Theory of Island Biogeography Princeton University Press Princeton, NJ . J

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. 1991 . High species richness in an Estonian wooded meadow . J. Veg. Sci. 2 : 715 – 718 . MacArthur , R.H. and Wilson , E.O. 1967 . The Theory of Island Biogeography

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–46. Fattorini, S. 2005. A simple method to fit geometric series and broken stick models in community ecology and island biogeography. Acta Oecol. 28: 199–205. Fattorini S. A simple method

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