J 2016

Vliv akumulace dusíku na vřesoviště a suché trávníky v Národním parku Podyjí

ZÁHORA, Jaroslav; Milan CHYTRÝ; Petr HOLUB; Karel FIALA; Ivan TŮMA et al.

Základní údaje

Originální název

Vliv akumulace dusíku na vřesoviště a suché trávníky v Národním parku Podyjí

Název anglicky

The Effect of Nitrogen Accumulation on Heathlands and Dry Grasslands in the české Podyjí National Park

Autoři

ZÁHORA, Jaroslav; Milan CHYTRÝ; Petr HOLUB; Karel FIALA; Ivan TŮMA; Jana VAVŘÍKOVÁ; Martina FABŠIČOVÁ; Iva KEIZER a Lenka FILIPOVÁ

Vydání

Životné prostredie : revue pre teóriu a tvorbu životného prostredia, Slovenská akadémia vied, 2016, 0044-4863

Další údaje

Jazyk

čeština

Typ výsledku

Článek v odborném periodiku

Obor

10600 1.6 Biological sciences

Stát vydavatele

Slovensko

Utajení

není předmětem státního či obchodního tajemství

Odkazy

Organizační jednotka

Přírodovědecká fakulta

Klíčová slova anglicky

Arrhenatherum elatius; atmospheric nitrogen deposition; Calluna vulgaris; Calamagrostis epigejos; Festuca ovina; soil; Podyji National Park
Změněno: 12. 11. 2016 10:08, prof. RNDr. Milan Chytrý, Ph.D.

Anotace

Anglicky

The increasing availability of soil mineral nitrogen is often considered as a cause of expansion of nitrogen-demanding tall grasses into oligotrophic species-rich heathlands and dry grasslands dominated by Festuca ovina. Consequently these ecosystems tend to lose their biodiversity. This paper summarizes the main results of different studies focused on the soil nitrogen transformation and availability in the heathlands and dry grasslands in the Podyjí National Park (southern Czech Republic). Increasing soil mineral nitrogen availability accelerates expansion of competitive tall grasses Calamagrostis epigejos and Arrhenatherum elatius there. Subsequently, due to higher plant and microbial demands for soil mineral nitrogen, the soil nitrogen availability in the tall-grass sites decreases. At the same time, experimental addition of carbon in the form of cellulose into dry grassland decreased nitrogen availability, which indicates that such ecosystem needs more carbon to effectively use the current levels of available soil nitrogen. Substantial differences between A. elatius a C. epigejos were found in their capability to (i) accumulate nitrogen in plant tissues, (ii) resorb nitrogen from above-ground biomass during senescence and (iii) release nitrogen from plant litter during decomposition. These observations point out to different growth and nutrient use strategies of the studied grass species and associated microbial communities in the rhizosphere.