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Biodiversity-ecosystem function in a willow biomass production system

tree productivity, litter decomposition and fungal community

Hoeber, Stefanie (2019). Biodiversity-ecosystem function in a willow biomass production system. Diss. (sammanfattning/summary) Uppsala : Sveriges lantbruksuniv., Acta Universitatis Agriculturae Sueciae, 1652-6880
ISBN 978-91-7760-452-5
eISBN 978-91-7760-453-2
[Doctoral thesis]

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The relationship between biodiversity and ecosystem function is an important issue in ecology. Stands of Salix (willow) are suitable model systems to study this relationship. Salix and other crops are mainly grown in monoculture in agricultural systems. Species or genotypes grown in monoculture share the same functional traits and can therefore be expected to compete strongly for resources. In contrast, different species or genotypes grown in mixed culture vary in their functional traits and may use different niches, leading to reduced competition. Thus, higher diversity in functional traits can increase ecosystem functions such as productivity and litter decomposition. This thesis examined how individual Salix genotypes affect community shoot biomass, litter decomposition and fungal diversity when grown in pure and mixed cultures of different genotypes.

Three field sites were established in Central and Northern Europe (Freiburg and Rostock in Germany, Uppsala in Sweden). Within each location, plots were planted with pure and mixed communities of four Salix genotypes (‘Björn’, ‘Jorr’, ‘Loden’ and ‘Tora’) that differ in their morphological and functional traits. In addition to the field study, the two taxonomically and physiologically most distinct genotypes (‘Loden’ and ‘Tora’) were grown under two different nutrient treatments in pure and mixed communities in a pot study.

Genotypes exerted different influences on the Salix community in which they were grown, although there was no general increase in productivity, decomposition rate or fungal diversity with increasing genetic richness. Among other findings, one genotype (‘Jorr’) enhanced productivity and litter decomposition when grown in mixed communities. Another genotype (‘Tora’) had a negative effect on productivity, litter decomposition and fungal diversity when added to a community. ‘Tora’ benefited from the presence of other genotypes, but under nutrient poor conditions it performed worse in the presence of a competitor. Litter chemistry differed between genotypes, and decomposition showed a distinct pattern between sites. Fungal communities were affected by different drivers including leaf chemistry, soil properties and genotype identity, but not by genetic diversity. The results suggest that the specific functional trait combinations of individual genotypes affect their response to mixture as compared to monoculture and that the attributes of individual genotypes are more important than genetic richness for the ecosystem functions studied here.

Authors/Creators:Hoeber, Stefanie
Title:Biodiversity-ecosystem function in a willow biomass production system
Subtitle:tree productivity, litter decomposition and fungal community
Series Name/Journal:Acta Universitatis Agriculturae Sueciae
Year of publishing :2019
Number of Pages:71
IHoeber, S., Fransson, P., Prieto-Ruiz, I., Manzoni, S. and Weih, M. (2017). Two Salix genotypes differ in productivity and nitrogen economy when grown in monoculture and mixture. Frontiers in Plant Science 8, 231.
IIHoeber, S., Arranz, C., Nordh, N.-E., Baum, C., Low, M., Nock, C., Scherer-Lorenzen, M. and Weih, M. (2018). Genotype identity has a more important influence than genotype diversity on shoot biomass productivity in willow short-rotation coppices. GCB Bioenergy 10(8), 534–547.
IIIHoeber, S., Fransson, P., Weih, M. and Manzoni, S. Leaf litter quality coupled to genotype identity drives Salix litter decomposition more than litter diversity and climate. (Manuscript)
IVHoeber, S., Baum, C., Weih, M. and Fransson, P. Plant genotype and diversity as potential drivers of soil fungal community structure and diversity in willow biomass systems. (Manuscript)
Place of Publication:Uppsala
Publisher:Department of Crop Production Ecology, Swedish University of Agricultural Sciences
ISBN for printed version:978-91-7760-452-5
ISBN for electronic version:978-91-7760-453-2
Publication Type:Doctoral thesis
Article category:Other scientific
Full Text Status:Public
Subjects:(A) Swedish standard research categories 2011 > 4 Agricultural Sciences > 401 Agricultural, Forestry and Fisheries > Agricultural Science
(A) Swedish standard research categories 2011 > 1 Natural sciences > 106 Biological Sciences (Medical to be 3 and Agricultural to be 4) > Ecology
Keywords:Short rotation coppice, Salix, genetic diversity, genotype complementarity, biomass productivity, litter decomposition, fungal community
Permanent URL:
ID Code:16435
Faculty:NJ - Fakulteten för naturresurser och jordbruksvetenskap
Department:(NL, NJ) > Dept. of Crop Production Ecology
Deposited By: SLUpub Connector
Deposited On:15 Nov 2019 14:01
Metadata Last Modified:26 Aug 2020 19:36

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