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The Afro-alpine dwarf shrub Helichrysum citrispinum favours understorey plants through microclimate amelioration

Titelangaben

Schweiger, Andreas ; Otieno, Dennis O. ; Kulunge, Salum R. ; Reineking, Björn ; Tenhunen, John:
The Afro-alpine dwarf shrub Helichrysum citrispinum favours understorey plants through microclimate amelioration.
In: Plant Ecology & Diversity. Bd. 8 (2015) Heft 3 . - S. 293-303.
ISSN 1755-0874
DOI: https://doi.org/10.1080/17550874.2015.1014207

Abstract

Background: Positive plant – plant interactions similar to specialised plant growth forms are potential strategies to overcome the environmental harshness of Afro-alpine ecosystems. However, knowledge about plant – plant interactions is limited for African alpine regions.Aims: We investigated the ameliorative effect of the densely leaved dwarf shrub Helichrysum citrispinum on two frequently co-occurring herbaceous plant species in the alpine zone of Mt. Kilimanjaro.Methods: We recorded microclimatic conditions, plant water potentials and gross primary production (GPP) for plants of the low-growing perennial Alchemilla johnstonii and the tussock grass Festuca abyssinica and compared these parameters between open sites and under H. citrispinum shrubs between July and August 2012.Results: Shrubs significantly buffered daily variation and extreme values of irradiation, air-, plant surface- and soil-temperatures as well as vapour pressure de fi cit. We found enhanced plant water potentials and gross primary production for shaded plants of both species investigated; ameliorative effects were higher for A. johnstonii than for F. abyssinica.Conclusions: Habitat amelioration of H. citrispinum significantly improves the productivity of plant species that grow under the shrub, although the net outcome may be affected by interspecific growth form differences. Future studies on positive plant – plant interactions should more strongly focus on the ecophysiological consequences of habitat amelioration.Link

Weitere Angaben

Publikationsform: Artikel in einer Zeitschrift
Begutachteter Beitrag: Ja
Zusätzliche Informationen: BAYCEER128612
Institutionen der Universität: Fakultäten > Fakultät für Biologie, Chemie und Geowissenschaften > Fachgruppe Geowissenschaften > Lehrstuhl Biogeographie
Forschungseinrichtungen
Forschungseinrichtungen > Forschungszentren
Forschungseinrichtungen > Forschungszentren > Bayreuther Zentrum für Ökologie und Umweltforschung - BayCEER
Fakultäten
Fakultäten > Fakultät für Biologie, Chemie und Geowissenschaften
Fakultäten > Fakultät für Biologie, Chemie und Geowissenschaften > Fachgruppe Geowissenschaften
Titel an der UBT entstanden: Ja
Themengebiete aus DDC: 500 Naturwissenschaften und Mathematik
Eingestellt am: 04 Aug 2016 06:46
Letzte Änderung: 17 Apr 2018 11:05
URI: https://eref.uni-bayreuth.de/id/eprint/33814