Abstract
Species richness and small‐scale spatial dynamics (turnover) were compared in four sites during 1990‐1993 1) former alvar grassland, now young Pinus sylvestris forest, 2) clear‐cut in 1990, 3) clear‐cut and grazed by sheep, 4) nearby grassland It was hypothesized that in communities which show large‐scale dynamics, small‐scale dynamics is also more rapid to support succession Area‐based species richness and shoot density increased in the cut and grazed site No significant dynamics was found in shoot‐based species richness Therefore the forest was considered to be stable and the cut and grazed site large‐scale dynamical (successional) Almost equally high small‐scale turnover values were found in all sites, which supports the carousel model for successional communities, but means we had to reject the initial hypothesis The successional and intrinsic small‐scale dynamics of the communities studied were two separate processes which acted at different scales, but the scale could not be only spatially determined, it depended also on the shoot density The overgrowing of this former alvar grassland has resulted in the decrease of shoot density and thus the decrease of species richness per unit area, but the total number of species has not changed much Consequently the possibility to restore grassland communities remains
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Claims 11
Claim · model-written summary
Area-based species richness increased in the cut and grazed site.
Verbatim
t0“alvar plant communities”
e0“Area‐based species richness and shoot density increased in the cut and grazed site”
Claim · model-written summary
Shoot density increased in the cut and grazed site.
Verbatim
t0“alvar plant communities”
e0“Area‐based species richness and shoot density increased in the cut and grazed site”
Claim · model-written summary
Shoot-based species richness showed no significant dynamics.
Not reportedDirection
Verbatim
t0“alvar plant communities”
e0“No significant dynamics was found in shoot‐based species richness”
Claim · model-written summary
The forest was considered stable.
Verbatim
e0“Therefore the forest was considered to be stable”
Claim · model-written summary
The cut and grazed site was considered successional.
Verbatim
t0“alvar plant communities”
e0“the cut and grazed site large‐scale dynamical (successional)”
Claim · model-written summary
Small-scale turnover was nearly equally high across all sites, supporting the carousel model and rejecting the initial hypothesis.
Verbatim
t0“alvar plant communities”
e0“Almost equally high small‐scale turnover values were found in all sites, which supports the carousel model for successional communities, but means we had to reject the initial hypothesis”
Claim · model-written summary
Successional and intrinsic small-scale dynamics were separate processes whose scale also depended on shoot density.
Verbatim
t0“alvar plant communities”
e0“The successional and intrinsic small‐scale dynamics of the communities studied were two separate processes which acted at different scales, but the scale could not be only spatially determined, it depended also on the shoot density”
Claim · model-written summary
Overgrowth of former alvar grassland decreased shoot density.
Verbatim
e0“The overgrowing of this former alvar grassland has resulted in the decrease of shoot density and thus the decrease of species richness per unit area”
Claim · model-written summary
Overgrowth of former alvar grassland decreased species richness per unit area.
Verbatim
e0“The overgrowing of this former alvar grassland has resulted in the decrease of shoot density and thus the decrease of species richness per unit area”
Claim · model-written summary
Total species number changed little despite overgrowth.
Verbatim
t0“alvar plant communities”
e0“the total number of species has not changed much”
Claim · model-written summary
The authors conclude that restoring grassland communities remains possible.
Verbatim
t0“alvar plant communities”
e0“Consequently the possibility to restore grassland communities remains”