Conversion of tropical lowland forest reduces nutrient return through litterfall, and alters nutrient use efficiency and seasonality of net primary production
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- 作者：Martyna M. Kotowska ; Christoph Leuschner ; Triadiati Triadiati ; Dietrich Hertel
- 关键词：Land ; use change ; Leaf litter ; Oil palm plantation ; Rubber plantation ; Nutrient cycling ; Stem growth ; Root litter
- 刊名：Oecologia
- 出版年：2016
- 出版时间：February 2016
- 年：2016
- 卷：180
- 期：2
- 页码：601-618
- 全文大小：1,294 KB
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Christoph Leuschner (1)
Triadiati Triadiati (2)
Dietrich Hertel (1)
1. Department of Plant Ecology and Ecosystems Research, Albrecht von Haller Institute for Plant Sciences, University of Göttingen, Göttingen, Germany
2. Department of Biology, Faculty of Mathematics and Natural Sciences, Bogor Agricultural University, Bogor, Indonesia - 刊物类别：Biomedical and Life Sciences
- 刊物主题：Life Sciences
Ecology
Plant Sciences - 出版者：Springer Berlin / Heidelberg
- ISSN：1432-1939
文摘
Tropical landscapes are not only rapidly transformed by ongoing land-use change, but are additionally confronted by increasing seasonal climate variation. There is an increasing demand for studies analyzing the effects and feedbacks on ecosystem functioning of large-scale conversions of tropical natural forest into intensively managed cash crop agriculture. We analyzed the seasonality of aboveground litterfall, fine root litter production, and aboveground woody biomass production (ANPPwoody) in natural lowland forests, rubber agroforests under natural tree cover (“jungle rubber”), rubber and oil palm monocultures along a forest-to-agriculture transformation gradient in Sumatra. We hypothesized that the temporal fluctuation of litter production increases with increasing land-use intensity, while the associated nutrient fluxes and nutrient use efficiency (NUE) decrease. Indeed, the seasonal variation of aboveground litter production and ANPPwoody increased from the natural forest to the plantations, while aboveground litterfall generally decreased. Nutrient return through aboveground litter was mostly highest in the natural forest; however, it was significantly lower only in rubber plantations. NUE of N, P and K was lowest in the oil palm plantations, with natural forest and the rubber systems showing comparably high values. Root litter production was generally lower than leaf litter production in all systems, while the root-to-leaf ratio of litter C flux increased along the land-use intensity gradient. Our results suggest that nutrient and C cycles are more directly affected by climate seasonality in species-poor agricultural systems than in species-rich forests, and therefore might be more susceptible to inter-annual climate fluctuation and climate change. Keywords Land-use change Leaf litter Oil palm plantation Rubber plantation Nutrient cycling Stem growth Root litter