2020
Directional trends in species composition over time can lead to a widespread overemphasis of year-to-year asynchrony
VALENCIA, Enrique, Francesco DE BELLO, Jan LEPŠ, Thomas GALLAND, Anna E-VOJTKÓ et. al.Základní údaje
Originální název
Directional trends in species composition over time can lead to a widespread overemphasis of year-to-year asynchrony
Autoři
VALENCIA, Enrique (724 Španělsko, garant), Francesco DE BELLO, Jan LEPŠ (203 Česká republika), Thomas GALLAND, Anna E-VOJTKÓ, Luisa CONTI, Jiří DANIHELKA (203 Česká republika, domácí), Jürgen DENGLER (276 Německo), David J. ELDRIDGE, Marc ESTIARTE, Ricardo GARCIA-GONZALEZ, Eric GARNIER, Daniel GOMEZ, Susan HARRISON, Tomáš HERBEN (203 Česká republika), Ricardo IBÁÑEZ, Anke JENTSCH, Norbert JUERGENS, Miklós KERTÉSZ, Katja KLUMPP, Frédérique LOUAULT, Rob H. MARRS, Gábor ÓNODI, Robin J. PAKEMAN, Meelis PÄRTEL, Begoña PECO, Josep PENUELAS, Marta RUEDA, Wolfgang SCHMIDT, Ute SCHMIEDEL, Martin SCHUETZ, Hana SKÁLOVÁ, Petr ŠMILAUER (203 Česká republika), Marie ŠMILAUEROVÁ, Christian SMIT, Ming-Hua SONG, Martin STOCK, James VAL, Vigdis VANDVIK, Karsten WESCHE, Ben A. WOODCOCK, Truman P. YOUNG, Fei-Hai YU, Martin ZOBEL a Lars GÖTZENBERGER (276 Německo)
Vydání
Journal of Vegetation Science, Hoboken, Wiley, 2020, 1100-9233
Další údaje
Jazyk
angličtina
Typ výsledku
Článek v odborném periodiku
Obor
10618 Ecology
Stát vydavatele
Spojené státy
Utajení
není předmětem státního či obchodního tajemství
Odkazy
Impakt faktor
Impact factor: 2.685
Kód RIV
RIV/00216224:14310/20:00116729
Organizační jednotka
Přírodovědecká fakulta
UT WoS
000553661300001
Klíčová slova anglicky
asynchrony; biodiversity; stability; synchrony; temporal dynamics; year-to-year fluctuation
Štítky
Příznaky
Recenzováno
Změněno: 29. 4. 2021 17:23, Mgr. Marie Šípková, DiS.
Anotace
V originále
Questions: Compensatory dynamics are described as one of the main mechanisms that increase community stability, e.g., where decreases of some species on a year-to-year basis are offset by an increase in others. Deviations from perfect synchrony between species (asynchrony) have therefore been advocated as an important mechanism underlying biodiversity effects on stability. However, it is unclear to what extent existing measures of synchrony actually capture the signal of year-to-year species fluctuations in the presence of long-term directional trends in both species abundance and composition (species directional trends hereafter). Such directional trends may lead to a misinterpretation of indices commonly used to reflect year-to-year synchrony. An approach based on three-term local quadrat variance (T3) which assesses population variability in a three-year moving window, was used to overcome species directional trend effects. This "detrending" approach was applied to common indices of synchrony across a worldwide collection of 77 temporal plant community datasets comprising almost 7,800 individual plots sampled for at least six years. Plots included were either maintained under constant "control" conditions over time or were subjected to different management or disturbance treatments. Accounting for directional trends increased the detection of year-to-year synchronous patterns in all synchrony indices considered. Specifically, synchrony values increased significantly in similar to 40% of the datasets with theT3 detrending approach while in similar to 10% synchrony decreased. For the 38 studies with both control and manipulated conditions, the increase in synchrony values was stronger for longer time series, particularly following experimental manipulation. Species' long-term directional trends can affect synchrony and stability measures potentially masking the ecological mechanism causing year-to-year fluctuations. As such, previous studies on community stability might have overemphasised the role of compensatory dynamics in real-world ecosystems, and particularly in manipulative conditions, when not considering the possible overriding effects of long-term directional trends.