Light can modify density-dependent seedling mortality in a temperate forest

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00027073%3A_____%2F21%3AN0000004" target="_blank" >RIV/00027073:_____/21:N0000004 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/62156489:43410/21:43919651

Výsledek na webu

<a href="https://onlinelibrary.wiley.com/doi/10.1111/jvs.12992" target="_blank" >https://onlinelibrary.wiley.com/doi/10.1111/jvs.12992</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1111/jvs.12992" target="_blank" >10.1111/jvs.12992</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Light can modify density-dependent seedling mortality in a temperate forest

Popis výsledku v původním jazyce

Questions: There is growing evidence on how density-dependent drivers of plant performance are influenced by habitat heterogeneity such as variation in understorey light availability. How these processes operate in temperate forests still remains an open question, however. We examined the interactive effects of density dependence and light availability on woody seedling mortality across multiple species, two size stages and growth forms. Location: Alluvial old-growth temperate forest, southeastern Czech Republic. Methods: We mapped seedlings of woody species (>= 10 cm tall) and recorded their mortality over a two-year period on 21 square seedling plots (25 m(2)) within one large square plot with all trees mapped (>= 1 cm diameter at breast height). Seedling mortality was studied using a combined approach of generalised linear mixed models and spatial point pattern analyses. Results: Density-dependent effects of tree and seedling neighbours influenced seedling mortality at different spatial scales, depending on their size class, growth form and by taxon. Conspecific inhibition raised the mortality of seedlings other than Acer campestre at low light levels, indicating that host-specific enemies and/or intraspecific competition may be important in unfavourable habitats. While small seedlings experienced conspecific inhibition at low light levels, tall seedlings were additively affected by low-light conditions and competition with trees. Both conspecific and heterospecific neighbours tended to affect tree seedlings at low light levels, whereas shrub seedlings experienced light- and density-independent mortality. Some negative interspecific interactions indicated ongoing expansion of species like Acer campestre in currently flood-free habitats. Conclusions: How density-dependent effects translate into demographic outcomes for woody seedling populations may be largely determined by variation in understorey light availability. Given that seedlings differ in size, growth form and taxa, we also demonstrate that both seedling and tree neighbours may contribute to the strength and spatial variation in density-dependent effects at seedling neighbourhood scales.

Název v anglickém jazyce

Light can modify density-dependent seedling mortality in a temperate forest

Popis výsledku anglicky

Questions: There is growing evidence on how density-dependent drivers of plant performance are influenced by habitat heterogeneity such as variation in understorey light availability. How these processes operate in temperate forests still remains an open question, however. We examined the interactive effects of density dependence and light availability on woody seedling mortality across multiple species, two size stages and growth forms. Location: Alluvial old-growth temperate forest, southeastern Czech Republic. Methods: We mapped seedlings of woody species (>= 10 cm tall) and recorded their mortality over a two-year period on 21 square seedling plots (25 m(2)) within one large square plot with all trees mapped (>= 1 cm diameter at breast height). Seedling mortality was studied using a combined approach of generalised linear mixed models and spatial point pattern analyses. Results: Density-dependent effects of tree and seedling neighbours influenced seedling mortality at different spatial scales, depending on their size class, growth form and by taxon. Conspecific inhibition raised the mortality of seedlings other than Acer campestre at low light levels, indicating that host-specific enemies and/or intraspecific competition may be important in unfavourable habitats. While small seedlings experienced conspecific inhibition at low light levels, tall seedlings were additively affected by low-light conditions and competition with trees. Both conspecific and heterospecific neighbours tended to affect tree seedlings at low light levels, whereas shrub seedlings experienced light- and density-independent mortality. Some negative interspecific interactions indicated ongoing expansion of species like Acer campestre in currently flood-free habitats. Conclusions: How density-dependent effects translate into demographic outcomes for woody seedling populations may be largely determined by variation in understorey light availability. Given that seedlings differ in size, growth form and taxa, we also demonstrate that both seedling and tree neighbours may contribute to the strength and spatial variation in density-dependent effects at seedling neighbourhood scales.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

40102 - Forestry

Projekt

<a href="/cs/project/GA20-17282S" target="_blank" >GA20-17282S: Účinky biotických interakcí v různých prostorových měřítkách v tropickém a temperátním lese</a><br>

Návaznosti

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

Rok uplatnění

2021

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

1654-1103

Svazek periodika

32

Číslo periodika v rámci svazku

1

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

12

Strana od-do

e12992

Kód UT WoS článku

000624605000022

EID výsledku v databázi Scopus

2-s2.0-85101772721