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Determinants of bryophyte species composition and diversity on the Great Alvar of Öland, Sweden

Tyler, Torbjörn LU ; Bengtsson, Fia; Dahlberg, Carl-Johan; Lönnell, Niklas; Hallingbäck, Tomas and Reitalu, Triin (2018) In Journal of Bryology 40(1).
Abstract
Factors driving the species richness and distribution of bryophytes are poorly studied and not well understood, particularly in grasslands. We analysed the occurrence of bryophyte species and variation in species richness across 674 plots (0.5 m× 0.5 m) in alvar vegetation (grassland on limestone pavement with thin or no soil) on Öland (Sweden) in relation to substrate characteristics and chemistry, inundation
frequency, grazing pressure and geographical variables. We found 148 taxa, including 11 nationally redlisted ones. Species richness per plot was significantly associated with substrate type, positively associated with pH and grazing intensity, but negatively associated with soil depth. However, richness of species typical of, or... (More)
Factors driving the species richness and distribution of bryophytes are poorly studied and not well understood, particularly in grasslands. We analysed the occurrence of bryophyte species and variation in species richness across 674 plots (0.5 m× 0.5 m) in alvar vegetation (grassland on limestone pavement with thin or no soil) on Öland (Sweden) in relation to substrate characteristics and chemistry, inundation
frequency, grazing pressure and geographical variables. We found 148 taxa, including 11 nationally redlisted ones. Species richness per plot was significantly associated with substrate type, positively associated with pH and grazing intensity, but negatively associated with soil depth. However, richness of species typical of, or restricted to, alvar habitats responded differently to richness of species more common in other habitats. Typical alvar species were favoured by high pH, shallow soil and low
phosphate availability, while generalists preferred relatively low pH, higher phosphate availability and organic or mull soil types. Distance from the alvar margin had only weak effects. Concerning the effects on individual species and community composition, inundation frequency and pH were found to have the largest effects, although other factors (substrate type, soil depth, bare soil, bare stone, phosphate
availability and grazing pressure) were more important for some individual species, stressing the importance of microsite variability and variability in management for regional species richness. From a conservation perspective, it is concluded that grazing is generally positive whilst factors increasing phosphate availability may disadvantage the typical alvar species, and proximity to the alvar margin is not
a major problem. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
epub
subject
keywords
Alvar, Calcareous grassland, Edge effect, Grazing, Inundation, pH, Phosphate, Soil chemistry, Soil depth, Species richness
in
Journal of Bryology
volume
40
issue
1
pages
19 pages
publisher
Maney Publishing
external identifiers
  • scopus:85041831541
ISSN
1743-2820
DOI
10.1080/03736687.2017.1412387
language
English
LU publication?
yes
id
dadd360f-773f-4104-9a04-e07fc3169fb6
date added to LUP
2018-02-13 12:59:32
date last changed
2018-02-25 04:22:07
@article{dadd360f-773f-4104-9a04-e07fc3169fb6,
  abstract     = {Factors driving the species richness and distribution of bryophytes are poorly studied and not well understood, particularly in grasslands. We analysed the occurrence of bryophyte species and variation in species richness across 674 plots (0.5 m× 0.5 m) in alvar vegetation (grassland on limestone pavement with thin or no soil) on Öland (Sweden) in relation to substrate characteristics and chemistry, inundation<br/>frequency, grazing pressure and geographical variables. We found 148 taxa, including 11 nationally redlisted ones. Species richness per plot was significantly associated with substrate type, positively associated with pH and grazing intensity, but negatively associated with soil depth. However, richness of species typical of, or restricted to, alvar habitats responded differently to richness of species more common in other habitats. Typical alvar species were favoured by high pH, shallow soil and low<br/>phosphate availability, while generalists preferred relatively low pH, higher phosphate availability and organic or mull soil types. Distance from the alvar margin had only weak effects. Concerning the effects on individual species and community composition, inundation frequency and pH were found to have the largest effects, although other factors (substrate type, soil depth, bare soil, bare stone, phosphate<br/>availability and grazing pressure) were more important for some individual species, stressing the importance of microsite variability and variability in management for regional species richness. From a conservation perspective, it is concluded that grazing is generally positive whilst factors increasing phosphate availability may disadvantage the typical alvar species, and proximity to the alvar margin is not<br/>a major problem.},
  author       = {Tyler, Torbjörn and Bengtsson, Fia and Dahlberg, Carl-Johan and Lönnell, Niklas and Hallingbäck, Tomas and Reitalu, Triin},
  issn         = {1743-2820},
  keyword      = {Alvar,Calcareous grassland,Edge effect,Grazing,Inundation,pH,Phosphate, Soil chemistry,Soil depth,Species richness},
  language     = {eng},
  month        = {02},
  number       = {1},
  pages        = {19},
  publisher    = {Maney Publishing},
  series       = {Journal of Bryology},
  title        = {Determinants of bryophyte species composition and diversity on the Great Alvar of Öland, Sweden},
  url          = {http://dx.doi.org/10.1080/03736687.2017.1412387},
  volume       = {40},
  year         = {2018},
}