Steinbauer, MJ; Irl, S; González, JM; Breiner, F; Hernández Hernández, R; Hopfenmüller, S; Kidane, Y; Jentsch, A; Beierkuhnlein, C: Plant invasion and speciation along elevational gradients on the oceanic island La Palma, Canary Islands, Ecology and Evolution, 7(2), 771-779 (2017), doi:DOI: 10.1002/ece3.2640
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.
Upcoming ...


BayCEER Colloquium:
Th. 2019-12-12
Iron, sulfur and a pinch of antimony - new perspectives on secondary mineral pathways and metalloid mobility
Ecological-Botanical Garden:
Su. 2020-01-05
Auf ins Neue! Winterspaziergang im ÖBG
Su. 2020-01-05
Konzert: Musikalischer Jahresbeginn mit den Rockin`Dinos
Geographisches Kolloquium:
Tu. 2019-12-10
Intensify or diversify? How agriculture affects biodiversity and ecosystem processes in European farmland
Tu. 2019-12-17
The meat of the Anthropocene: Food, capital and the globalisation of industrialised animal killing
BayCEER Blog
24.05.2019
Stoichiometric controls of C and N cycling
07.05.2019
Flying halfway across the globe to dig in the dirt – a research stay in Bloomington, USA
07.05.2019
EGU – interesting research and free coffee
16.04.2019
Picky carnivorous plants?
RSS Blog as RSS Feed
Weather research site
Luftdruck (356m): 969.5 hPa
Lufttemperatur: 6.8 °C
Niederschlag: 0.2 mm/24h
Sonnenschein: <1 h/d
Wind (Höhe 17m): 12.8 km/h
Wind (Max.): 27.0 km/h
Windrichtung: SW

...more
Globalstrahlung: 1 W/m²
Lufttemperatur: 3.1 °C
Niederschlag: 0.7 mm/24h
Sonnenschein: <1 h/d
Wind (Höhe 32m): 23.0 km/h

...more
This site makes use of cookies More information