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Influence of tree cover on herbaceous layer development and carbon and water fluxes in a Portuguese cork oak woodland

Title data

Dubbert, Maren ; Mosena, Alexander ; Piayda, Arndt ; Cuntz, Matthias ; Correia, Alexandra C. ; Pereira, João Santos ; Werner, Christiane:
Influence of tree cover on herbaceous layer development and carbon and water fluxes in a Portuguese cork oak woodland.
In: Acta Oecologica. Vol. 59 (2014) . - pp. 35-45.
ISSN 1873-6238
DOI: https://doi.org/10.1016/j.actao.2014.05.007

Abstract in another language

Facilitation and competition between different vegetation layers may have a large impact on small-scale vegetation development. We propose that this should not only influence overall herbaceous layer yield but also species distribution and understory longevity, and hence the ecosystems carbon uptake capacity especially during spring. We analyzed the effects of trees on microclimate and soil properties (water and nitrate content) as well as the development of an herbaceous community layer regarding species composition, aboveground biomass and net water and carbon fluxes in a cork-oak woodland in Portugal, between April and November 2011.The presence of trees caused a significant reduction in photosynthetic active radiation of 35 mol m-2 d-1 and in soil temperature of 5°C from April to October. At the same time differences in species composition between experimental plots located in open areas and directly below trees could be observed: species composition and abundance of functional groups became increasingly different between locations from mid April onwards. During late spring drought adapted native forbs had significantly higher cover and biomass in the open area while cover and biomass of grasses and nitrogen fixing forbs was highest under the trees. Further, evapotranspiration and net carbon exchange decreased significantly stronger under the tree crowns compared to the open during late spring and the die back of herbaceous plants occurred earlier and faster under trees. This was most likely caused by interspecific competition for water between trees and herbaceous plants, despite the more favorable microclimate conditions under the trees during the onset of summer drought.

Further data

Item Type: Article in a journal
Refereed: Yes
Additional notes: BAYCEER123122
Institutions of the University: Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Earth Sciences
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Earth Sciences > Professorship AgroEcoSystem Research
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Earth Sciences > Former Professors > Professorship AgroEcoSystem Research - Univ.-Prof. Dr. Christiane Werner Pinto
Research Institutions > Research Centres > Bayreuth Center of Ecology and Environmental Research- BayCEER
Faculties
Faculties > Faculty of Biology, Chemistry and Earth Sciences
Research Institutions
Research Institutions > Research Centres
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Earth Sciences > Former Professors
Result of work at the UBT: Yes
DDC Subjects: 500 Science
Date Deposited: 22 Jul 2015 05:41
Last Modified: 18 Sep 2015 09:39
URI: https://eref.uni-bayreuth.de/id/eprint/16959