000225231 001__ 225231
000225231 005__ 20190829172533.0
000225231 0247_ $$2doi$$a10.1016/j.ecolind.2016.02.039
000225231 022__ $$a1470-160X
000225231 02470 $$2ISI$$a000388785300006
000225231 037__ $$aARTICLE
000225231 245__ $$aSensitivity and resistance of soil fertility indicators to land-use changes: New concept and examples from conversion of Indonesian rainforest to plantations
000225231 260__ $$bElsevier Science Bv$$c2016$$aAmsterdam
000225231 269__ $$a2016
000225231 300__ $$a9
000225231 336__ $$aJournal Articles
000225231 520__ $$aTropical forest conversion to agricultural land leads to a strong decrease of soil organic carbon (SOC) stocks. While the decrease of the soil C sequestration function is easy to measure, the impacts of SOC losses on soil fertility remain unclear. Especially the assessment of the sensitivity of other fertility indicators as related to ecosystem services suffers from a lack of clear methodology. We developed a new approach to assess the sensitivity of soil fertility indicators and tested it on biological and chemical soil properties affected by rainforest conversion to plantations. The approach is based on (non-)linear regressions between SOC losses and fertility indicators normalized to their level in a natural ecosystem. Biotic indicators (basal respiration, microbial biomass, acid phosphatase), labile SOC pools (dissolved organic carbon and light fraction) and nutrients (total N and available P) were measured in Ah horizons from rainforests, jungle rubber, rubber (Hevea brasiliensis) and oil palm (Elaeis guineensis) plantations located on Sumatra. The negative impact of land-use changes on all measured indicators increased in the following sequence: forest < jungle rubber < rubber < oil palm. The basal respiration, microbial biomass and nutrients were resistant to SOC losses, whereas the light fraction was lost stronger than SOC. Microbial C use efficiency was independent on land use. The resistance of C availability for microorganisms to SOC losses suggests that a decrease of SOC quality was partly compensated by litter input and a relative enrichment by nutrients. However, the relationship between the basal respiration and SOC was non-linear; i.e. negative impact on microbial activity strongly increased with SOC losses. Therefore, a small decrease of C content under oil palm compared to rubber plantations yielded a strong drop in microbial activity. Consequently, management practices mitigating SOC losses in oil palm plantations would strongly increase soil fertility and ecosystem stability. We conclude that the new approach enables quantitatively assessing the sensitivity and resistance of diverse soil functions to land-use changes and can thus be used to assess resilience of agroecosystems with various use intensities. (C) 2016 Elsevier Ltd. All rights reserved.
000225231 6531_ $$aSOC availability
000225231 6531_ $$aSoil degradation
000225231 6531_ $$aLand use
000225231 6531_ $$aMicrobial activity
000225231 6531_ $$aLabile pool
000225231 6531_ $$aEcosystem resistance
000225231 700__ $$g268199$$0254718$$aGuillaume, Thomas
000225231 700__ $$aMaranguit, Deejay
000225231 700__ $$aMurtilaksono, Kukuh
000225231 700__ $$aKuzyakov, Yakov
000225231 773__ $$j67$$tEcological Indicators$$q49-57
000225231 909C0 $$xU11021$$pECOS$$0252129
000225231 909CO $$qENAC$$particle$$ooai:infoscience.tind.io:225231
000225231 917Z8 $$x268199
000225231 937__ $$aEPFL-ARTICLE-225231
000225231 973__ $$rREVIEWED$$sPUBLISHED$$aEPFL
000225231 980__ $$aARTICLE