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@article{1673204,
author = {Peterka, Tomáš and Syrovátka, Vít and Dítě, Daniel and Hájková, Petra and Hrubanová, Monika and Jiroušek, Martin and Plesková, Zuzana and Singh, Patrícia and Šímová, Anna and Šmerdová, Eva and Hájek, Michal},
article_location = {Hoboken},
article_number = {4},
doi = {http://dx.doi.org/10.1111/jvs.12885},
keywords = {fens; phytosociology; plot size; scale; specialist plants; species–area relationship; vegetation classification; vegetation plot; vegetation survey; wetlands},
language = {eng},
issn = {1100-9233},
journal = {Journal of Vegetation Science},
title = {Is variable plot size a serious constraint in broad–scale vegetation studies? A case study on fens},
url = {https://onlinelibrary.wiley.com/doi/epdf/10.1111/jvs.12885},
volume = {31},
year = {2020}
}
TY - JOUR
ID - 1673204
AU - Peterka, Tomáš - Syrovátka, Vít - Dítě, Daniel - Hájková, Petra - Hrubanová, Monika - Jiroušek, Martin - Plesková, Zuzana - Singh, Patrícia - Šímová, Anna - Šmerdová, Eva - Hájek, Michal
PY - 2020
TI - Is variable plot size a serious constraint in broad–scale vegetation studies? A case study on fens
JF - Journal of Vegetation Science
VL - 31
IS - 4
SP - 594-605
EP - 594-605
PB - Wiley
SN - 11009233
KW - fens
KW - phytosociology
KW - plot size
KW - scale
KW - specialist plants
KW - species–area relationship
KW - vegetation classification
KW - vegetation plot
KW - vegetation survey
KW - wetlands
UR - https://onlinelibrary.wiley.com/doi/epdf/10.1111/jvs.12885
L2 - https://onlinelibrary.wiley.com/doi/epdf/10.1111/jvs.12885
N2 - Filtering vegetation plot records according to sampling size is an essential methodological step in vegetation studies. In fens, the variation of traditionally used plot sizes seems to limit continental-scale syntheses following the Braun-Blanquet approach. Which plot sizes harbour the analogous number of habitat specialists (i.e., diagnostic/indicator species) and capture the main compositional gradients identically? The data set of fen vegetation plot records was compiled using large databases and categorised into four distinct habitats. For each habitat, semi-log species–area curves of specialists and other species were fitted using generalised additive models (GAM). In addition, we surveyed 72 sites in a series of plot sizes (0.07, 0.25, 1, 4, 16 m2) where we applied, separately for each plot size, Non-Metric Multi-Dimensional Scaling (NMDS) and compared the resulting patterns with Procrustes analysis. Consistently across different fen habitats, the species–area curves of specialists increased steeply up to the plot size of 1 m2, while increasing negligibly in the plot size range of 1–25 m2. In contrast, the species–area curves of other species displayed mostly linear to linear-exponential trends. NMDS ordinations of medium (1 and 4 m2) and large plots (16 m2) were the most congruent, while the patterns captured in the ordination of the smallest plots (0.07 m2) differed most from the others. In fens, plot sizes of at least 1 m2 describe sufficiently the broad-scale pattern in specialists’ diversity as well as the main environmental gradients. The range of plot sizes of 1–25 m2 may be safely merged in broad-scale analyses of fen vegetation without introducing substantial bias, at least when compared with other possible uncertainty sources.
ER -
PETERKA, Tomáš, Vít SYROVÁTKA, Daniel DÍTĚ, Petra HÁJKOVÁ, Monika HRUBANOVÁ, Martin JIROUŠEK, Zuzana PLESKOVÁ, Patrícia SINGH, Anna ŠÍMOVÁ, Eva ŠMERDOVÁ and Michal HÁJEK. Is variable plot size a serious constraint in broad–scale vegetation studies? A case study on fens. \textit{Journal of Vegetation Science}. Hoboken: Wiley, 2020, vol.~31, No~4, p.~594-605. ISSN~1100-9233. Available from: https://dx.doi.org/10.1111/jvs.12885.
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