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The role of .i.Armadillidium vulgare./i. (Isopoda: Oniscidea) in litter decomposition and soil organic matter stabilization
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SYSNO ASEP 0438808 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název The role of Armadillidium vulgare (Isopoda: Oniscidea) in litter decomposition and soil organic matter stabilization Tvůrce(i) Špaldoňová, Alexandra (BC-A)
Frouz, Jan (BC-A) RID, ORCIDZdroj.dok. Applied Soil Ecology. - : Elsevier - ISSN 0929-1393
Roč. 83, November (2014), s. 186-192Poč.str. 7 s. Jazyk dok. eng - angličtina Země vyd. NL - Nizozemsko Klíč. slova feces ; litter decomposition ; microbial respiration ; priming effect ; terrestrial isopods ; TMAH-Py-GC MS Vědní obor RIV EH - Ekologie - společenstva Institucionální podpora BC-A - RVO:60077344 UT WOS 000343318400024 DOI 10.1016/j.apsoil.2014.04.012 Anotace We studied the effects of the terrestrial isopod Armadillidium vulgare on organic matter decomposition and stabilization in a long-term (65-week) laboratory experiment. We quantified the microbial activity in leaf litter (Acer pseudoplatanus) which did not come into contact with isopods, in A. vulgare feces produced from the same litter, and in unconsumed leftover of this litter. Freshly fallen leaf litter and up to 3 day old feces and leftover of litter were used. All materials were air dried immediately after collection and rewetted 1 day before use. Simultaneously, we measured how microbial activity in litter and feces are affected by fluctuations in humidity and temperature and by the addition of easily decomposed substances (starch and glucose). Microbial respiration was lower in feces than in litter or unconsumed leaf fragments. At the same time, moisture and temperature fluctuations and addition of glucose or starch increased respiration much more in litter than in feces. The results indicate that the processing of litter by A. vulgare reduces microbial respiration and reduces the sensitivity of microbial respiration to environmental fluctuations. C-13 NMR spectra from feces indicated preferential loss of polysaccharide-carbon and accumulation of lignin with some modification to the aromatic-carbon. TMAH-Py-GC MS showed that lignin content was higher in feces than in litter and that lignin quality differed between the two substrates. Guaiacyl units were depleted in the feces, which indicated breakdown of guaiacyl associated with gut passage. As a conclusion, the results suggest that this common isopod greatly affects leaf litter decomposition. Decomposition of isopod feces in a long-term experiment is lower than litter decomposition which may support stabilization of organic matter in soil. This is caused mainly due to higher content of aromatic carbon in feces, which may cause its considerable resistance to bacterial degradation. Pracoviště Biologické centrum (od r. 2006) Kontakt Dana Hypšová, eje@eje.cz, Tel.: 387 775 214 Rok sběru 2015
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