Trait hierarchies and intraspecific variability drive competitive interactions in Mediterranean annual plants

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985939%3A_____%2F19%3A00509463" target="_blank" >RIV/67985939:_____/19:00509463 - isvavai.cz</a>

Alternative codes found

RIV/60076658:12310/19:43899368

Result on the web

<a href="http://hdl.handle.net/11104/0300204" target="_blank" >http://hdl.handle.net/11104/0300204</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1111/1365-2745.13248" target="_blank" >10.1111/1365-2745.13248</a>

Result language

angličtina

Original language name

Trait hierarchies and intraspecific variability drive competitive interactions in Mediterranean annual plants

Original language description

1. Both intra- and interspecific differences in traits may modulate interactions between plants. Two mechanisms are hypothesized to regulate these effects: competitive hierarchies and trait dissimilarities, but it is unclear how the prevalence of each might depend on environmental conditions and on intra and interspecific differences.n2. We sowed six replicates of all possible pairwise combinations across eight annual species (including conspecific competition and individuals without competitors), in pots under two levels of fertilization. We measured above- and below-ground traits and total biomass of the focal individuals. We expressed competition as the decrease in biomass of focal individuals relative to biomass without competition, and modelled competition using directional (hierarchy) or non-directional (dissimilarity) trait differences, with or without intraspecific variability (ITV).n3. We found evidence of different trait hierarchies operating under different fertilization conditions but little support for trait dissimilarities. The negative effect of competition on focal plants increased with the height of the competitors in both of fertilization levels. Further, in unfertilized conditions, plants with lower specific leaf area (SLA) and larger root systems experienced less competition. Including ITV in trait hierarchies substantially improved our ability to predict the intensity of competition. This was partly due to ITV reducing competitive hierarchies.n4. Synthesis. Our results underscore the importance of traits in driving interactions among plants. Competitive relationships between species depend on complex interactions between trait intra and interspecific differences and resource availability. ITV appears to be a mechanism capable of reducing trait hierarchies, and hence the intensity of competition between coexisting plants.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

10618 - Ecology

Project

—

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2019

Confidentiality

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

Name of the periodical

Journal of Ecology

ISSN

0022-0477

e-ISSN

—

Volume of the periodical

107

Issue of the periodical within the volume

5

Country of publishing house

GB - UNITED KINGDOM

Number of pages

12

Pages from-to

2078-2089

UT code for WoS article

000484311000005

EID of the result in the Scopus database

2-s2.0-85070747125