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Plant invasion and speciation along elevational gradients on the oceanic island La Palma, Canary Islands

DOI zum Zitieren dieses Dokuments: https://doi.org/10.1002/ece3.2640

Title data

Steinbauer, Manuel ; Irl, Severin D. H. ; González-Mancebo, Juana Maria ; Breiner, Frank T. ; Hernández-Hernández, Raquel ; Hopfenmüller, Sebastian ; Kidane, Yohannes ; Jentsch, Anke ; Beierkuhnlein, Carl:
Plant invasion and speciation along elevational gradients on the oceanic island La Palma, Canary Islands.
In: Ecology and Evolution. Vol. 7 (2017) Issue 2 . - pp. 771-779.
ISSN 2045-7758
DOI: https://doi.org/10.1002/ece3.2640

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Abstract

Background: Ecosystems that provide environmental opportunities but are poor in species and functional richness generally support speciation as well as invasion processes. These processes are expected not to be equally effective along elevational gradients due to specific ecological, spatial and anthropogenic filters, thus controlling the dispersal and establishment of species. Here, we investigate speciation and invasion processes along elevational gradients.Methods: We assess the vascular plant species richness as well as the number and percentage of endemic species and non-native species systematically along three elevational gradients covering large parts of the climatic range of La Palma, Canary Islands. Results: Species richness was negatively correlated with elevation, while the percentage of Canary endemic species showed a positive relationship. However, the percentage of Canary-Madeira endemics did not show a relationship with elevation. Non-native species richness (indicating invasion) peaked at 500 m elevation and showed a consistent decline until about 1200 m elevation. Above that limit no non-native species were present in the studied elevational gradients.Conclusion: Ecological, anthropogenic and spatial filters control richness, diversification and invasion with elevation. With increasing elevation, richness decreases due to species-area relationships. Ecological limitations of native ruderal species related to anthropogenic pressure are in line with the absence of non-native species from high elevations indicating directional ecological filtering. Increasing ecological isolation with elevation drives diversification and thus increased percentages of archipelago Canary endemics. The best preserved eastern transect, including mature laurel forests is an exception. The high percentage of Canary-Madeira endemics indicates the cloud forest’s environmental uniqueness – and thus ecological isolation - beyond the Macaronesian islands.

Further data

Item Type: Article in a journal
Additional notes (visible to public): BAYCEER138309
DDC Subjects: 500 Science
Institutions of the University: Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Earth Sciences > Chair Biogeography
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Earth Sciences > Chair Biogeography > Chair Biogeography - Univ.-Prof. Dr. Carl Beierkuhnlein
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Earth Sciences > Professorship Disturbance Ecology
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Earth Sciences > Professorship Disturbance Ecology > Professorship Disturbance Ecology - Univ.-Prof. Dr. Anke Jentsch
Research Institutions
Research Institutions > Research Centres
Research Institutions > Research Centres > Bayreuth Center of Ecology and Environmental Research- BayCEER
Faculties
Faculties > Faculty of Biology, Chemistry and Earth Sciences
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Earth Sciences
Language: English
Originates at UBT: Yes
Date Deposited: 11 Jan 2018 08:52
Last Modified: 19 Apr 2018 10:32
URI: https://epub.uni-bayreuth.de/id/eprint/3648

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