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Web Ecology An open-access peer-reviewed journal
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Volume 18, issue 1 | Copyright
Web Ecol., 18, 55-65, 2018
https://doi.org/10.5194/we-18-55-2018
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.

Standard article 13 Apr 2018

Standard article | 13 Apr 2018

The relationships between biodiversity and ecosystem services and the effects of grazing cessation in semi-natural grasslands

Sølvi Wehn, Knut Anders Hovstad, and Line Johansen Sølvi Wehn et al.
  • The Norwegian Institute of Bioeconomy Research (NIBIO), Klæbuveien 153, 7031 Tronheim, Norway

Abstract. Land use change can affect biodiversity, and this has an impact on ecosystem services (ESs), but the relationships between biodiversity and ESs are complex and poorly understood. Biodiversity is declining due to the abandonment of extensively grazed semi-natural grasslands.

We therefore aim to explore relationships between biodiversity and ESs provided by extensively managed semi-natural grasslands. Focusing on vascular plant species richness, as well as the ESs fodder quantity, quality, and stability, allergy control, climate regulation, nutrient cycling, pollination, and aesthetic appreciation, we carried out botanical field surveys of 28 paired extensively grazed and abandoned semi-natural grassland plots, with four subplots of 4m2 in each plot. The management of the semi-natural grasslands is and has been at low intensity. We calculated the influence of abandonment on the ES indicators, measured the correlation between the biodiversity measure of vascular plant species richness and ES indicators, and finally determined how the relationships between plant species richness and the ES indicators were affected by the cessation of the extensive management.

ES indicators are often, but not always, positively correlated with species richness. Cessation of extensive grazing has both negative and positive effects on ES indicators but the relationships between species richness and ES indicators are often different in extensively managed and abandoned semi-natural grasslands. The relationships between species richness and ES indicators are less pronounced in the extensively managed semi-natural grassland than for the abandoned. One possible reason for this outcome is high functional redundancy in the extensively managed semi-natural grasslands.

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We studied the effect of abandonment of extensively managed semi-natural grasslands on indicators of ecosystem services (ES) and found both positive and negative effects. We also studied relationships between ESs and plant species richness and whether abandonment affect these relationships. For several ESs we observed positive relationships. However, the relationships differed often between the abandoned and managed grasslands because the relationships were less pronounced in the managed.
We studied the effect of abandonment of extensively managed semi-natural grasslands on...
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