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Conservative N cycl...
Conservative N cycling despite high atmospheric deposition in early successional African tropical lowland forests
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Makelele, I. A. (author)
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Bauters, M. (author)
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Verheyen, K. (author)
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Barthel, M. (author)
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Six, J. (author)
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- Rütting, Tobias, 1977 (author)
- Gothenburg University,Göteborgs universitet,Institutionen för geovetenskaper,Department of Earth Sciences
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Bode, S. (author)
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Ntaboba, L. C. (author)
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Bazirake, B. M. (author)
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Bosela, F. B. (author)
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Kimbesa, F. (author)
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Ewango, C. (author)
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Boeckx, P. (author)
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(creator_code:org_t)
- 2022-05-06
- 2022
- English.
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In: Plant and Soil. - : Springer Science and Business Media LLC. - 0032-079X .- 1573-5036. ; 477, s. 743-758
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https://doi.org/10.1...
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Abstract
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- Background Across the tropics, the share of secondary versus primary forests is strongly increasing. The high rate of biomass accumulation during this secondary succession relies on the availability of essential nutrients, such as nitrogen (N). Nitrogen primarily limits many young secondary forests in the tropics. However, recent studies have shown that forests of the Congo basin are subject to high inputs of atmospheric N deposition, potentially alleviating this N limitation in early succession. Methods To address this hypothesis, we assessed the N status along a successional gradient of secondary forests in the Congo basin. In a set-up of 18 plots implemented along six successional stages, we quantified year-round N deposition, N leaching, N2O emission and the N flux of litterfall and fine root assimilation. Additionally, we determined the N content and C:N stoichiometry for canopy leaves, fine roots, and litter, as well as delta N-15 of canopy leaves. Results We confirmed that these forests receive high amounts of atmospheric N deposition, with an increasing deposition as forest succession proceeds. Additionally, we noted lower C:N ratios, and higher N leaching losses, N2O emission, and foliar delta N-15 in older secondary forest (60 years). In contrast, higher foliar, litter and root C:N ratios, and lower foliar delta N-15, N leaching, and N2O emission in young (< 20 years) secondary forest were observed. Conclusions Altogether, we show that despite high N deposition, this early forest succession still shows conservative N cycling characteristics, which are likely indicating N limitation early on in secondary forest succession. As secondary succession advances, the N cycle gradually becomes more open.
Subject headings
- NATURVETENSKAP -- Biologi -- Botanik (hsv//swe)
- NATURAL SCIENCES -- Biological Sciences -- Botany (hsv//eng)
- LANTBRUKSVETENSKAPER -- Lantbruksvetenskap, skogsbruk och fiske -- Jordbruksvetenskap (hsv//swe)
- AGRICULTURAL SCIENCES -- Agriculture, Forestry and Fisheries -- Agricultural Science (hsv//eng)
Keyword
- Congo basin
- Nitrogen cycle
- Secondary succession
- Tropical forests
- biogeochemistry
- rain-forest
- isotopic composition
- nitrogen deposition
- soil
- carbon
- interception
- throughfall
- basin
- emissions
- fixation
- Agriculture
- Plant Sciences
Publication and Content Type
- ref (subject category)
- art (subject category)
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To the university's database
- By the author/editor
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Makelele, I. A.
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Bauters, M.
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Verheyen, K.
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Barthel, M.
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Six, J.
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Rütting, Tobias, ...
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show more...
-
Bode, S.
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Ntaboba, L. C.
-
Bazirake, B. M.
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Bosela, F. B.
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Kimbesa, F.
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Ewango, C.
-
Boeckx, P.
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show less...
- About the subject
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Biological Scien ...
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and Botany
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- AGRICULTURAL SCIENCES
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AGRICULTURAL SCI ...
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and Agriculture Fore ...
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and Agricultural Sci ...
- Articles in the publication
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Plant and Soil
- By the university
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University of Gothenburg