Assessing vegetation change using vegetation-plot databases: a
risky business

J 2014

Assessing vegetation change using vegetation-plot databases: a risky business

CHYTRÝ, Milan, Lubomír TICHÝ, Stephan M HENNEKENS a Joop H J SCHAMINÉE

Základní údaje

Originální název

Assessing vegetation change using vegetation-plot databases: a risky business

Autoři

CHYTRÝ, Milan (203 Česká republika, garant, domácí), Lubomír TICHÝ (203 Česká republika, domácí), Stephan M HENNEKENS (528 Nizozemské království) a Joop H J SCHAMINÉE (528 Nizozemské království)

Vydání

Applied Vegetation Science, Wiley, 2014, 1402-2001

Další údaje

Jazyk

angličtina

Typ výsledku

Článek v odborném periodiku

Obor

10600 1.6 Biological sciences

Stát vydavatele

Spojené státy

Utajení

není předmětem státního či obchodního tajemství

Odkazy

URL

Impakt faktor

Impact factor: 2.548

Kód RIV

RIV/00216224:14310/14:00073527

Organizační jednotka

Přírodovědecká fakulta

DOI

http://dx.doi.org/10.1111/avsc.12050

UT WoS

000328544400005

Klíčová slova anglicky

Permanent plot; Phytosociological database; Plant community; Releve; Revisitation study; Sampling bias; Species composition; Temporal trend

Štítky

AKR, rivok

Příznaky

Mezinárodní význam, Recenzováno

Změněno: 13. 3. 2018 10:47, Mgr. Lucie Jarošová, DiS.

Anotace

V originále

Aim: Data from vegetation plots can be used for the assessment of past vegetation change in three ways: (1) comparison of old and new records from permanent plots established for vegetation monitoring; (2) revisiting historical phytosociological plots and subsequent comparison of old and new records; (3) comparison of large sets of old and new phytosociological records from the same area but different plots. Option (3) would be the cheapest in regions where large vegetation-plot databases are available, but there is a risk of incorrect results due to a spatial mismatch of old and new plots. Here we assess the accuracy of such analyses. Methods: We used three data sets of permanent plots from Czech mountain bogs and Dutch oak forests and heathlands to quantify vegetation change. We selected subsets to simulate analyses based on (1) data from permanent plots or revisited phytosociological plots, i.e. containing old and new records from the same plots, (2) vegetation-plot databases with old and new records from different, randomly selected sites, and (3) vegetation-plot databases with old and new records from different but close sites. We repeated each subset selection 1000 times and analysed vegetation change in each of the three data sets and each variant of subset selection using permutational multivariate analysis of variance. Results: For data sets with no actual vegetation change, analyses of some subsets simulating vegetation-plot databases incorrectly suggested significant changes. For a data set with real change, a change was detected in analyses of simulated vegetation-plot databases, but in several cases it had a different direction or magnitude to the real change. Conclusions: The assessment of vegetation change using vegetation-plot databases should be either avoided or interpreted with extreme caution because of the risk of incorrect results. Analyses such as these may be used to propose hypotheses about past vegetation change, but their results should not be considered valid unless confirmed using more reliable data. In many contexts, re-visitation studies of historical phytosociological plots may be the best strategy to assess past vegetation change, while new networks of carefully stratified permanent plots are preferable for monitoring future change.

Návaznosti

GAP505/11/0732, projekt VaV

Název: Zobecněná řízená klasifikace v ekologii společenstev

Investor: Grantová agentura ČR, Generalized supervised classification in community ecology

Citovat

CHYTRÝ, Milan, Lubomír TICHÝ, Stephan M HENNEKENS a Joop H J SCHAMINÉE. Assessing vegetation change using vegetation-plot databases: a risky business. Applied Vegetation Science. Wiley, 2014, roč. 17, č. 1, s. 32-41. ISSN 1402-2001. Dostupné z: https://dx.doi.org/10.1111/avsc.12050.

@article{1169085,
   author = {Chytrý, Milan and Tichý, Lubomír and Hennekens, Stephan M and Schaminée, Joop H J},
   article_number = {1},
   doi = {http://dx.doi.org/10.1111/avsc.12050},
   keywords = {Permanent plot; Phytosociological database; Plant community; Releve; Revisitation study; Sampling bias; Species composition; Temporal trend},
   language = {eng},
   issn = {1402-2001},
   journal = {Applied Vegetation Science},
   title = {Assessing vegetation change using vegetation-plot databases: a risky business},
   url = {http://onlinelibrary.wiley.com/doi/10.1111/avsc.12050/abstract},
   volume = {17},
   year = {2014}
}

TY  - JOUR
ID  - 1169085
AU  - Chytrý, Milan - Tichý, Lubomír - Hennekens, Stephan M - Schaminée, Joop H J
PY  - 2014
TI  - Assessing vegetation change using vegetation-plot databases: a risky business
JF  - Applied Vegetation Science
VL  - 17
IS  - 1
SP  - 32-41
EP  - 32-41
PB  - Wiley
SN  - 14022001
KW  - Permanent plot
KW  - Phytosociological database
KW  - Plant community
KW  - Releve
KW  - Revisitation study
KW  - Sampling bias
KW  - Species composition
KW  - Temporal trend
UR  - http://onlinelibrary.wiley.com/doi/10.1111/avsc.12050/abstract
N2  - Aim: Data from vegetation plots can be used for the assessment of past vegetation change in three ways: (1) comparison of old and new records from permanent plots established for vegetation monitoring; (2) revisiting historical phytosociological plots and subsequent comparison of old and new records; (3) comparison of large sets of old and new phytosociological records from the same area but different plots. Option (3) would be the cheapest in regions where large vegetation-plot databases are available, but there is a risk of incorrect results due to a spatial mismatch of old and new plots. Here we assess the accuracy of such analyses. Methods: We used three data sets of permanent plots from Czech mountain bogs and Dutch oak forests and heathlands to quantify vegetation change. We selected subsets to simulate analyses based on (1) data from permanent plots or revisited phytosociological plots, i.e. containing old and new records from the same plots, (2) vegetation-plot databases with old and new records from different, randomly selected sites, and (3) vegetation-plot databases with old and new records from different but close sites. We repeated each subset selection 1000 times and analysed vegetation change in each of the three data sets and each variant of subset selection using permutational multivariate analysis of variance. Results: For data sets with no actual vegetation change, analyses of some subsets simulating vegetation-plot databases incorrectly suggested significant changes. For a data set with real change, a change was detected in analyses of simulated vegetation-plot databases, but in several cases it had a different direction or magnitude to the real change. Conclusions: The assessment of vegetation change using vegetation-plot databases should be either avoided or interpreted with extreme caution because of the risk of incorrect results. Analyses such as these may be used to propose hypotheses about past vegetation change, but their results should not be considered valid unless confirmed using more reliable data. In many contexts, re-visitation studies of historical phytosociological plots may be the best strategy to assess past vegetation change, while new networks of carefully stratified permanent plots are preferable for monitoring future change.
ER  -

CHYTRÝ, Milan, Lubomír TICHÝ, Stephan M HENNEKENS a Joop H J SCHAMINÉE. Assessing vegetation change using vegetation-plot databases: a risky business. \textit{Applied Vegetation Science}. Wiley, 2014, roč.~17, č.~1, s.~32-41. ISSN~1402-2001. Dostupné z: https://dx.doi.org/10.1111/avsc.12050.

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