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Variation in plant litter decomposition rates across extreme dry environments in Qatar
Department of Biological and Environmental Sciences, College of Arts and Sciences, Qatar University, P.O. Box: 2713, Doha, Qatar.
Umeå universitet, Teknisk-naturvetenskapliga fakulteten, Institutionen för ekologi, miljö och geovetenskap. Ecology and Biodiversity Group and Plant Ecophysiology Group, Utrecht University, Padualaan 8, Utrecht, Netherlands.ORCID-id: 0000-0001-6187-499x
Department of Biological and Environmental Sciences, College of Arts and Sciences, Qatar University, P.O. Box: 2713, Doha, Qatar.
2017 (engelsk)Inngår i: Arab World Geographer, ISSN 1480-6800, Vol. 20, nr 2-3, s. 252-261Artikkel, forskningsoversikt (Fagfellevurdert) Published
Abstract [en]

Decomposition of plant litter is a key process for transfer of carbon and nutrients in ecosystems. Carbon contained in decaying biomass is released to the atmosphere as respired CO2, a greenhouse gas that contributes to global warming. To our knowledge, there have been no studies on litter decomposition in terrestrial ecosystems in the Arabian peninsula. Here we used commercial teabags (green tea, rooibos tea) as standard substrates to study decomposition rates across contrasting ecosystems in Qatar. Teabags were buried under and beside Acacia tortilis trees, in depressions with abundant grass vegetation, in saltmarsh without and with vegetation, under Zygophyllum qatarense in drylands, in natural mangrove and in planted mangrove. There were significant site effects across ecosystems on decomposition rate (k), litter stabilisation factor (S), final weight of green tea and final weight of rooibos tea. Mangrove and depressions with grassland had the smallest amounts of remaining green and rooibos tea after the incubation period (69-82 days), while teabags buried under A. tortilis and in saltmarsh without vegetation had the largest amounts. Thus decomposition rates differ among ecosystems in the desert environment. Further multi-year and site studies are needed to identify factors that influence decomposition rates across sites in extreme environments.

sted, utgiver, år, opplag, sider
The University of Akron Press, 2017. Vol. 20, nr 2-3, s. 252-261
Emneord [en]
Arabian Peninsula, Carbon turnover, Climate change, Green tea, Litter bags, Plant litter decomposition rates, Rooibos tea, Teabag index
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URN: urn:nbn:se:umu:diva-215476Scopus ID: 2-s2.0-85042451976OAI: oai:DiVA.org:umu-215476DiVA, id: diva2:1806676
Tilgjengelig fra: 2023-10-23 Laget: 2023-10-23 Sist oppdatert: 2023-10-23bibliografisk kontrollert

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