NDLI: Species richness of vascular plants, bryophytes and lichens in dry grasslands: The effects of environment, landscape structure and competition

Content Provider	Springer Nature Link
Author	Löbel, Swantje Dengler, Jürgen Hobohm, Carsten
Copyright Year	2006
Abstract	We studied the relative importance of local habitat conditions and landscape structure for species richness of vascular plants, bryophytes and lichens in dry grasslands on the Baltic island of Öland (Sweden). In addition, we tested whether relationships between species richness and vegetation cover indicate that competition within and between the studied taxonomic groups is important. We recorded species numbers of vascular plants, bryophytes and lichens in 4 m$^{2}$ plots (n=452), distributed over dry grassland patches differing in size and degree of isolation. Structural and environmental data were collected for each plot. We tested effects of local environmental conditions, landscape structure and vegetation cover on species richness using generalized linear mixed models. Different environmental variables explained species richness of vascular plants, bryophytes and lichens. Environmental effects, particularly soil pH, were more important than landscape structure. Interaction effects of soil pH with other environmental variables were significant in vascular plants. Plot heterogeneity enhanced species richness. Size and degree of isolation of dry grassland patches significantly affected bryophyte and lichen species richness, but not that of vascular plants. We observed negative relationships between bryophyte and lichen species richness and the cover of vascular plants. To conclude, effects of single environmental variables on species richness depend both on the taxonomic group and on the combination of environmental factors on a whole. Dispersal limitation in bryophytes and lichens confined to dry grasslands may be more common than is often assumed. Our study further suggests that competition between vascular plants and cryptogams is rather asymmetric.
Starting Page	377
Ending Page	393
Page Count	17
File Format	PDF
ISSN	12119520
Journal	Folia Geobotanica
Volume Number	41
Issue Number	4
e-ISSN	18749348
Language	English
Publisher	Springer Netherlands
Publisher Date	2006-01-01
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Alvar Biodiversity Dispersal limitation Environmental heterogeneity Fragmentation Soil pH Spatial autocorrelation Life Sciences Plant Sciences Plant Systematics/Taxonomy/Biogeography Plant Ecology
Content Type	Text
Resource Type	Article
Subject	Plant Science Paleontology

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