Changes in plant diversity and carbon stocks along a succession from semi natural grassland to submediterranean Quercus cerris L. woodland in Central Italy
Author(s)
Date Issued
2019
Type
article
Volume
49
Start Page
393
End Page
408
Journal
Abstract
Aims: The majority of research on the diversity-productivity relationship has utilized aboveground plant biomass
as a measure of overall ecosystem productivity and investigated successions with species-poor early stages. During this study we modelled patterns of plant diversity and carbon pools along a succession from pasture
abandonment to submediterranean Quercus cerris woodland and investigated ecosystem productivity using biomass and soil carbon. Study area: The hilly-mountainous area of Tolfa in Central Italy. Methods: We used
chronosequences to analyse changes in vascular plant species richness and composition across successional
stages and along a gradient of productivity (i.e. of increasing carbon stocks). To test possible differences across successional stages species richness and carbon pool data were analysed through analysis of variance. Mixed model regression analyses were used to test the effect of the amount of the carbon stocks on the variation in
plant species richness and composition. Results: We found a high variation in plant species richness along the succession, with grasslands and newly formed woods showing the highest values. The amount of carbon in
biomass and soil increased along the succession, even if soil carbon did not differ significantly among successional
stages. Plant species richness was not dependent on the variation in the carbon pools (i.e. biomass and soil
carbon) along the succession, while plant species composition significantly responded to this variation. Conclusions: Our results strongly support the need to manage semi-natural ecosystems through a multi-functional perspective that values both carbon sequestration and biodiversity.