|Irl, S; Jentsch, A; Walther, GR: Papaver croceum LEDEB. - a rare example of an alien species in alpine environments of the Upper Engadine, Switzerland, Alpine Botany, 123(1), 21-30 (2013), doi:10.1007/s00035-013-0111-x|
Current research suggests that high-elevation mountain ecosystems are less susceptible to plant invasion than lowland ecosystems. Surprisingly, a number of successful establishments have been documented, although mainly from Mediterranean to tropical mountain systems. Evidence for alpine invaders in temperate mountain environments is scarce, increasing the importance to better understand their invasion process and mechanisms. This study characterizes the habitat of the Central Asian poppy, Papaver croceum, in its introduced range and compares it with a native congener, Papaver aurantiacum, in the subalpine and alpine zone of the Upper Engadine, Switzerland. Vegetation composition and soil characteristics were measured at P. croceum and P. aurantiacum sites in the Upper Engadine region. P. croceum is best characterized as a pioneer species preferring anthropogenic and naturally disturbed habitats on silicate soils ranging between 1700 and 2300 m a.s.l. in the study area. Species composition, Landolt indicator values for light availability, soil nitrogen and temperature as well as certain soil properties differed significantly between the sites colonized by native and exotic poppy species, although an overlapping zone exists in glacier forefield habitats of the study area. P. croceum did not express typical traits and characteristics of a disruptive invader. In the Morteratsch glacier forefield, however, it has invaded the primary successional stages but is outcompeted in later stages. Presently, a clear ecological separation is apparent between the native and alien congener indicating limited threat to the native congener. However, climate change, land use change and possible hybridization might alter P. croceum's current status as a non-disruptive invader.
Online-Auftaktveranstaltung: Klimafolgenanpassungskonzept Landkreis Bayreuth
Dialogforum Wasserkontroversen: Podium diskutiert zu Niedrigwasser
Consequences of climate-induced redox oscillations on iron, sulfur, and contaminant geochemistry in freshwater re-flooded acid sulfate soil wetlands
Investigating communal pathogen defense and its role in social evolution
Tracking pesticide turnover in soils with stable isotope tracers
Why Science Communication?
Stoichiometric controls of C and N cycling
Flying halfway across the globe to dig in the dirt – a research stay in Bloomington, USA
Picky carnivorous plants?