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| Titel |
The impact of land-use change on floristic diversity at regional scale in southern Sweden 600 BC-AD 2008 |
| VerfasserIn |
D. Fredh, A. Broström, M. Rundgren, P. Lagerås, F. Mazier, L. Zillén |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1726-4170
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| Digitales Dokument |
URL |
| Erschienen |
In: Biogeosciences ; 10, no. 5 ; Nr. 10, no. 5 (2013-05-08), S.3159-3173 |
| Datensatznummer |
250018244
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| Publikation (Nr.) |
 copernicus.org/bg-10-3159-2013.pdf |
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| Zusammenfassung |
| This study explores the relationship between land-use and floristic
diversity between 600 BC and AD 2008 in the uplands of southern Sweden. We
use fossil pollen assemblages and the Regional Estimates of Vegetation
Abundance from Large Sites (REVEALS) model to quantitatively reconstruct
land cover at a regional scale. Floristic richness and evenness are
estimated using palynological richness and REVEALS-based evenness,
respectively. We focus on the period AD 350 to 750 to investigate the impact
of an inferred, short-lived (< 200 yr) period of land-use
expansion and subsequent land abandonment on vegetation composition and
floristic diversity. The observed vegetation response is compared to that
recorded during the transition from traditional to modern land-use
management at the end of the 19th century. Our results suggest that
agricultural land use was most widespread between AD 350 and 1850, which
correlates broadly with high values of palynological richness. REVEALS-based
evenness was highest between AD 500 and 1600 which indicates a more equal
cover among taxa during this time interval. Palynological richness increased
during the inferred land-use expansion after AD 350 and decreased during the
subsequent regression AD 550–750, while REVEALS-based evenness increased
throughout this period. The values of palynological richness during the last
few decades are within the range observed during the last 1650 yr.
However, REVEALS-based evenness shows much lower values during the last
century compared to the previous ca. 2600 yr, which indicates that the
composition of present-day vegetation is unusual in a millennial
perspective. Our results show that regional scale changes in land use have
had clear impacts on floristic diversity in southern Sweden, with a
vegetation response time of less than 20 to 50 yr. We show the importance
of traditional land use to attain high biodiversity and suggest that
ecosystem management should include a regional landscape perspective. |
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