Počet záznamů: 1  

Biomass and enzyme activity of two soil transects at King George Island, Maritime Antarctica

  1. 1.
    SYSNO ASEP0129741
    Druh ASEPJ - Článek v odborném periodiku
    Zařazení RIVJ - Článek v odborném periodiku
    Poddruh JOstatní články
    NázevBiomass and enzyme activity of two soil transects at King George Island, Maritime Antarctica
    Tvůrce(i) Tscherko, D. (DE)
    Bölter, M. (DE)
    Beyer, L. (DE)
    Chen, J. (DE)
    Elster, Josef (BU-J) RID
    Kandeler, E. (DE)
    Kuhn, D. (DE)
    Blume, H. P. (DE)
    Zdroj.dok.Arctic Antarctic and Alpine Research - ISSN 1523-0430
    Roč. 35, č. 1 (2003), s. 34-47
    Poč.str.14 s.
    Jazyk dok.eng - angličtina
    Země vyd.US - Spojené státy americké
    Klíč. slovaMaritime Antarctica ; microbial soil biomass ; enzyme activity
    Vědní obor RIVEF - Botanika
    CEPGA205/94/0156 GA ČR - Grantová agentura ČR
    KSK6005114 GA AV ČR - Akademie věd
    CEZAV0Z6005908 - BU-J
    AnotaceSoil microbial properties were investigated to assess the potential of organic matter dynamics in mineral and ornithogenic soils in a cold climate. Microbial biomass, respiration, N-mineralization and enzyme activities were measured along two catenary transects crossing penguin rookeries and sea bird colonies. Ornithogenic excrements, total organic carbon (TOC) and phosphorus accumulation were major factors controlling microbial properties in Antarctic soils. Multivariate approaches (cluster and discriminant analysis) clearly distinguished the ornithogenic soils from the mineral soils based on their microbial characteristics. Microbial biomass, respiration and N-mineralization were gradually inhibited by increasing P-inputs by penguins. The metabolic quotient (qCO2) was negatively correlated to P-content, whereas all other microbial properties (microbial biomass, respiration, N-mineralization, enzyme activities) followed the patterns of TOC. Urease, xylanase, phosphatase and arylsulfatase activities were significantly favoured by penguin and sea bird excrements in the ornithogenic soils compared to the mineral soils. Microbial biomass-to-enzyme activity ratios were substantially higher at sites influenced by penguin guano than by other sea bird excrement. We show that enzymes are active in Antarctic soils, and that high levels of biomass-based specific activity in the ornithogenic soils, compared to those of mineral soils, result from continuous input of large quantities of enzyme-rich penguin guano.
    PracovištěBotanický ústav
    KontaktMartina Bartošová, martina.bartosova@ibot.cas.cz, ibot@ibot.cas.cz, Tel.: 271 015 242 ; Marie Kalátová, kalatova@butbn.cas.cz, Tel.: 384 721 156-8
    Rok sběru2004