Competition among functional groups increases asynchrony of their temporal fluctuations in a temperate grassland

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60076658%3A12310%2F19%3A43899636" target="_blank" >RIV/60076658:12310/19:43899636 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/60077344:_____/19:00509101

Výsledek na webu

<a href="https://onlinelibrary.wiley.com/doi/epdf/10.1111/jvs.12803" target="_blank" >https://onlinelibrary.wiley.com/doi/epdf/10.1111/jvs.12803</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1111/jvs.12803" target="_blank" >10.1111/jvs.12803</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Competition among functional groups increases asynchrony of their temporal fluctuations in a temperate grassland

Popis výsledku v původním jazyce

Questions We asked whether the competition among community components (a) destabilizes individual components; (b) increases the asynchrony of their fluctuations; and (c) stabilizes the total community biomass. Location Seminatural meadow in South Bohemia, Czech Republic. Methods We used biomass fluctuation data from a 13-year removal experiment. The plots used for this study contained, following experimental removal of other species, either mycorrhizal grasses only, mycorrhizal forbs only, or their mixture (grass &quot;monocultures&quot;, forb &quot;monocultures&quot;, and mixtures, respectively). Yearly peak aboveground biomass was available from ten blocks; biomass of the mixture plots was sorted into forbs and grasses. Temporal variability was characterized by coefficient of variation (CV) and synchrony by correlation coefficient, both calculated from the time series data. Results The variability of grass monocultures was higher than the variability of forb monocultures, which was slightly lower than the variability of mixtures. The variability of both grasses and forbs was higher in the mixture, where they are in competition with the other group, than in each of their respective monocultures. The correlation coefficients between the biomass of grass and forb monocultures within blocks were mostly positive, indicating that both groups tend to have similar physiological responses to weather fluctuations. The average correlation coefficient between the forbs and grasses in the mixture plots was significantly negative, thus reflecting the effect of competition between these two community components. The CV of the sum of forb and grass monocultures was similar to the CV of mixture plots. Conclusions Only competition between grasses and forbs leads to their negative mutual correlation, i.e., to compensatory dynamics. Our results support the hypothesis that competition has a destabilizing effect on individual community components (functional groups in our case) and increases asynchrony of their fluctuations. We have not found its stabilizing effect on the total biomass.

Název v anglickém jazyce

Competition among functional groups increases asynchrony of their temporal fluctuations in a temperate grassland

Popis výsledku anglicky

Questions We asked whether the competition among community components (a) destabilizes individual components; (b) increases the asynchrony of their fluctuations; and (c) stabilizes the total community biomass. Location Seminatural meadow in South Bohemia, Czech Republic. Methods We used biomass fluctuation data from a 13-year removal experiment. The plots used for this study contained, following experimental removal of other species, either mycorrhizal grasses only, mycorrhizal forbs only, or their mixture (grass &quot;monocultures&quot;, forb &quot;monocultures&quot;, and mixtures, respectively). Yearly peak aboveground biomass was available from ten blocks; biomass of the mixture plots was sorted into forbs and grasses. Temporal variability was characterized by coefficient of variation (CV) and synchrony by correlation coefficient, both calculated from the time series data. Results The variability of grass monocultures was higher than the variability of forb monocultures, which was slightly lower than the variability of mixtures. The variability of both grasses and forbs was higher in the mixture, where they are in competition with the other group, than in each of their respective monocultures. The correlation coefficients between the biomass of grass and forb monocultures within blocks were mostly positive, indicating that both groups tend to have similar physiological responses to weather fluctuations. The average correlation coefficient between the forbs and grasses in the mixture plots was significantly negative, thus reflecting the effect of competition between these two community components. The CV of the sum of forb and grass monocultures was similar to the CV of mixture plots. Conclusions Only competition between grasses and forbs leads to their negative mutual correlation, i.e., to compensatory dynamics. Our results support the hypothesis that competition has a destabilizing effect on individual community components (functional groups in our case) and increases asynchrony of their fluctuations. We have not found its stabilizing effect on the total biomass.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10618 - Ecology

Projekt

<a href="/cs/project/GA17-05506S" target="_blank" >GA17-05506S: Stabilní ale dynamické: mechanismy určující dlouhodobou dynamiku diverzity v temperátních trávnících</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2019

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Journal of Vegetation Science

ISSN

1100-9233

e-ISSN

—

Svazek periodika

30

Číslo periodika v rámci svazku

6

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

10

Strana od-do

1068-1077

Kód UT WoS článku

000486541500001

EID výsledku v databázi Scopus

2-s2.0-85073799680