Irl, S; Steinbauer, M; Messinger, J; Blume-Werry, G; Palomares-Martínez, A; Beierkuhnlein, C; Jentsch, A: Burned and devoured - Introduced herbivores, fire and the endemic flora of the high elevation ecosystem on La Palma, Canary Islands, Arctic Antarctic and Alpine Research, 46(4), 859-869 (2014), doi:10.1657/1938-4246-46.4.859
Abstract:
Novel disturbance regimes (e.g. introduced herbivores and fire) are among the major drivers of degradation in island ecosystems. High elevation ecosystems (HEEs) on islands might be especially vulnerable to these disturbances due to high endemism. Here, data from an 11-year exclosure experiment in the HEE of La Palma (Canary Islands) are presented where mammalian herbivores have been introduced. We investigate the combined effect of herbivory and fire on total species richness, seedling richness and seedling establishment on the whole system and a subset of highly endangered species (target species). Total species richness, seedling species richness, and seedling establishment decreased with herbivory. Five out of eight target species were exclusively found inside the exclosures indicating the negative impact of introduced herbivores on endemic high elevation flora. Target species were generally affected more negatively by introduced herbivores and were subject to significantly higher browsing pressure, probably owing to their lack of defense strategies. A natural wildfire that occurred six years before data sampling substantially increased total species richness and seedling richness in both herbivory exclosure and reference conditions. We conclude that species composition of the HEE has been severely altered by the introduction of non-native herbivores, even though fire seems to have a positive effect on this system.
Upcoming ...

Fr. 2020-07-10 now
12th BayCEER Workshop 2020: "Call for Abstracts" is open
BayCEER Colloquium:
Th. 2020-10-22
Extreme redox oscillations in freshwater re-flooded acid sulfate soil wetlands: Effects on Fe, S, and trace metals geochemical behavior
Th. 2020-10-29
Dissolved organic matter quality in differently managed forest ecosystems
Th. 2020-11-05
Signaling of rhizosphere microbiome: key for plant health, development and nutrition
Workshop:
Th. 2020-10-29
BayCEER Workshop 2020
BayCEER Blog
13.01.2020
Why Science Communication?
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
16.04.2019
Picky carnivorous plants?
RSS Blog as RSS Feed
Weather research site
Luftdruck (356m): 978.5 hPa
Lufttemperatur: 11.9 °C
Niederschlag: 0.0 mm/24h
Sonnenschein: <1 h/d
Wind (Höhe 17m): 0.8 km/h
Wind (Max.): 1.8 km/h
Windrichtung: SW

...more
Globalstrahlung: 22 W/m²
Lufttemperatur: 13.8 °C
Niederschlag: 0.0 mm/24h
Sonnenschein: <1 h/d
Wind (Höhe 32m): 0.0 km/h

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