Intraspecific genetic diversity and composition modify species-level diversity-productivity relationships
Authors: Schöb, C., Kerle, S., Karley, A.J., Morcillo, L., Pakeman, R.J., Newton, A.C. and Brooker, R.W.
Journal: New Phytologist
Volume: 205
Issue: 2
Pages: 720-730
eISSN: 1469-8137
ISSN: 0028-646X
DOI: 10.1111/nph.13043
Abstract:Summary: Biodiversity regulates ecosystem functions such as productivity, and experimental studies of species mixtures have revealed selection and complementarity effects driving these responses. However, the impacts of intraspecific genotypic diversity in these studies are unknown, despite it forming a substantial part of the biodiversity. In a glasshouse experiment we constructed plant communities with different levels of barley (Hordeum vulgare) genotype and weed species diversity and assessed their relative biodiversity effects through additive partitioning into selection and complementarity effects. Barley genotype diversity had weak positive effects on aboveground biomass through complementarity effects, whereas weed species diversity increased biomass predominantly through selection effects. When combined, increasing genotype diversity of barley tended to dilute the selection effect of weeds. We interpret these different effects of barley genotype and weed species diversity as the consequence of small vs large trait variation associated with intraspecific barley diversity and interspecific weed diversity, respectively. The different effects of intra- vs interspecific diversity highlight the underestimated and overlooked role of genetic diversity for ecosystem functioning.
Source: Scopus
Intraspecific genetic diversity and composition modify species-level diversity-productivity relationships.
Authors: Schöb, C., Kerle, S., Karley, A.J., Morcillo, L., Pakeman, R.J., Newton, A.C. and Brooker, R.W.
Journal: New Phytol
Volume: 205
Issue: 2
Pages: 720-730
eISSN: 1469-8137
DOI: 10.1111/nph.13043
Abstract:Biodiversity regulates ecosystem functions such as productivity, and experimental studies of species mixtures have revealed selection and complementarity effects driving these responses. However, the impacts of intraspecific genotypic diversity in these studies are unknown, despite it forming a substantial part of the biodiversity. In a glasshouse experiment we constructed plant communities with different levels of barley (Hordeum vulgare) genotype and weed species diversity and assessed their relative biodiversity effects through additive partitioning into selection and complementarity effects. Barley genotype diversity had weak positive effects on aboveground biomass through complementarity effects, whereas weed species diversity increased biomass predominantly through selection effects. When combined, increasing genotype diversity of barley tended to dilute the selection effect of weeds. We interpret these different effects of barley genotype and weed species diversity as the consequence of small vs large trait variation associated with intraspecific barley diversity and interspecific weed diversity, respectively. The different effects of intra- vs interspecific diversity highlight the underestimated and overlooked role of genetic diversity for ecosystem functioning.
Source: PubMed
Intraspecific genetic diversity and composition modify species-level diversity-productivity relationships.
Authors: Schöb, C., Kerle, S., Karley, A.J., Morcillo, L., Pakeman, R.J., Newton, A.C. and Brooker, R.W.
Journal: The New phytologist
Volume: 205
Issue: 2
Pages: 720-730
eISSN: 1469-8137
ISSN: 0028-646X
DOI: 10.1111/nph.13043
Abstract:Biodiversity regulates ecosystem functions such as productivity, and experimental studies of species mixtures have revealed selection and complementarity effects driving these responses. However, the impacts of intraspecific genotypic diversity in these studies are unknown, despite it forming a substantial part of the biodiversity. In a glasshouse experiment we constructed plant communities with different levels of barley (Hordeum vulgare) genotype and weed species diversity and assessed their relative biodiversity effects through additive partitioning into selection and complementarity effects. Barley genotype diversity had weak positive effects on aboveground biomass through complementarity effects, whereas weed species diversity increased biomass predominantly through selection effects. When combined, increasing genotype diversity of barley tended to dilute the selection effect of weeds. We interpret these different effects of barley genotype and weed species diversity as the consequence of small vs large trait variation associated with intraspecific barley diversity and interspecific weed diversity, respectively. The different effects of intra- vs interspecific diversity highlight the underestimated and overlooked role of genetic diversity for ecosystem functioning.
Source: Europe PubMed Central