Počet záznamů: 1
Biomass and enzyme activity of two soil transects at King George Island, Maritime Antarctica
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SYSNO ASEP 0129741 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Ostatní články Název Biomass 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, ORCID
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. 34-47Poč.str. 14 s. Jazyk dok. eng - angličtina Země vyd. US - Spojené státy americké Klíč. slova Maritime Antarctica ; microbial soil biomass ; enzyme activity Vědní obor RIV EF - Botanika CEP GA205/94/0156 GA ČR - Grantová agentura ČR KSK6005114 GA AV ČR - Akademie věd CEZ AV0Z6005908 - BU-J Anotace Soil 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. Pracoviště Botanický ústav Kontakt Martina Bartošová, martina.bartosova@ibot.cas.cz, ibot@ibot.cas.cz, Tel.: 271 015 242 ; Marie Jakšová, marie.jaksova@ibot.cas.cz, Tel.: 384 721 156-8 Rok sběru 2004
Počet záznamů: 1