Long-term time series of legume cycles in a seminatural montane grassland: evidence for nitrogen-driven grass dynamics?

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985939%3A_____%2F17%3A00479540" target="_blank" >RIV/67985939:_____/17:00479540 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/00216208:11310/17:10369013

Výsledek na webu

<a href="http://dx.doi.org/10.1111/1365-2435.12844" target="_blank" >http://dx.doi.org/10.1111/1365-2435.12844</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1111/1365-2435.12844" target="_blank" >10.1111/1365-2435.12844</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Long-term time series of legume cycles in a seminatural montane grassland: evidence for nitrogen-driven grass dynamics?

Popis výsledku v původním jazyce

We examine legume oscillations in a semi-natural mountain grassland using a long-term (30 years) data series on aboveground biomass of individual species and on nitrogen and phosphorus content over time. Using autocorrelation analysis, we show that there is a strong periodicity (with period of 8–9 years) of legume and grass biomass and nitrogen content in the grass biomass. These three variables are in fairly stable phase shifts relative to each other, with a grass peak followed by a peak in C : N ratio in grasses which is followed by a legume peak. Phosphorus content in either legume or grass biomass does not show synchronous cycling with legume or grass biomass or nitrogen content in grass. Fitting a dynamic linear model to the data showed that legumes affect nitrogen content in grasses, and grass biomass both affects and is affected by nitrogen content. In contrast, there is no negative effect of grasses on legumes, indicating some other process must be responsible for the legume decline. Manuring, which was occasionally applied to the plots, also does not seem to affect the cycling. Second-order term for legumes showed some evidence of self-inhibitory effects in legumes, but phosphorus content in legumes shows no support for phosphorus limitation. The most likely explanation of the legume decline should be sought elsewhere (pathogens, soil biota etc.). Long-term data support the existing the claim that legume dynamics are the key driver of nitrogen dynamics in nutrient-poor semi-natural grasslands. Grasses benefit from the nutrient enrichment due to legume cycling, but are a passive element and do not play a role in legume limitation. Apart from the role of nutrient cycling, these legume-driven nutrient dynamics also constitutes processes by which long-term richness of meadows is maintained.

Název v anglickém jazyce

Long-term time series of legume cycles in a seminatural montane grassland: evidence for nitrogen-driven grass dynamics?

Popis výsledku anglicky

We examine legume oscillations in a semi-natural mountain grassland using a long-term (30 years) data series on aboveground biomass of individual species and on nitrogen and phosphorus content over time. Using autocorrelation analysis, we show that there is a strong periodicity (with period of 8–9 years) of legume and grass biomass and nitrogen content in the grass biomass. These three variables are in fairly stable phase shifts relative to each other, with a grass peak followed by a peak in C : N ratio in grasses which is followed by a legume peak. Phosphorus content in either legume or grass biomass does not show synchronous cycling with legume or grass biomass or nitrogen content in grass. Fitting a dynamic linear model to the data showed that legumes affect nitrogen content in grasses, and grass biomass both affects and is affected by nitrogen content. In contrast, there is no negative effect of grasses on legumes, indicating some other process must be responsible for the legume decline. Manuring, which was occasionally applied to the plots, also does not seem to affect the cycling. Second-order term for legumes showed some evidence of self-inhibitory effects in legumes, but phosphorus content in legumes shows no support for phosphorus limitation. The most likely explanation of the legume decline should be sought elsewhere (pathogens, soil biota etc.). Long-term data support the existing the claim that legume dynamics are the key driver of nitrogen dynamics in nutrient-poor semi-natural grasslands. Grasses benefit from the nutrient enrichment due to legume cycling, but are a passive element and do not play a role in legume limitation. Apart from the role of nutrient cycling, these legume-driven nutrient dynamics also constitutes processes by which long-term richness of meadows is maintained.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10618 - Ecology

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

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

Rok uplatnění

2017

Kód důvěrnosti údajů

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

Název periodika

Functional Ecology

ISSN

0269-8463

e-ISSN

—

Svazek periodika

31

Číslo periodika v rámci svazku

7

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

11

Strana od-do

1430-1440

Kód UT WoS článku

000404860200008

EID výsledku v databázi Scopus

2-s2.0-85015198625