Land-use change impact on time-averaged carbon balances: rubber expansion and reforestation in a biosphere reserve, South-West China.

Abstract The expansion of rubber plantations ( Hevea brasiliensis Mull. Arg) is a major driving force for deforestation and forest degradation in mountainous South-East Asia. In China, the unclear distinction between natural forest and commercial plantations has permitted the expansion of rubber into protected forest areas of nature reserves. However, the impact of such land-use changes on landscape carbon balances within nature reserves has rarely been investigated. We selected the Naban River Watershed National Nature Reserve (NRWNNR) in Xishuangbanna, China as a case study area and evaluated carbon stocks using the Rapid Carbon Stock Appraisal (RaCSA) method based on tree, plot, land use and landscape assessments, integrating field sampling with remote sensing and GIS technology. Six dominant land use systems were surveyed: lowland forest ( 800 m a.s.l.), lowland rubber, highland rubber, bush and grassland and agricultural crops. Land use type-specific time-averaged carbon stocks ( C ta ) were calculated based on total above ground biomass (AGB). Soil organic carbon (surface 30 cm) and below ground biomass were measured, but not included in C ta calculations due to large uncertainties unrelated to land use change. The C ta of lowland and highland rubber plantations were 58 Mg C ha −1 and 28 Mg C ha −1 respectively, showing larger carbon sequestration potential than nonforest land use types (agricultural crops, bush and grassland) but much lower than C ta of natural forest (156–185 Mg C ha −1 ). Sensitivity analysis of C ta variability showed that forest C stocks have the largest influence on landscape carbon balance. Time series analysis of land-use and land-cover maps (1989, 2007, 2012) demonstrated that during 23 years, the whole landscape of the nature reserve (26,574 ha) gained 0.644 Tg C. Despite rubber expansion, biosphere zoning strategy (i.e. experimental, buffer, core zones), and reforestation activities conducted in NRWNNR were able to enhance the carbon stocks.

[1]  G. Stigler.  The Theory of Price , 1948 .

[2]  Bangqian Chen,et al.  Estimation of rubber stand age in typhoon and chilling injury afflicted area with Landsat TM data: A case study in Hainan Island, China , 2012 .

[3]  H. Neufeldt,et al.  Allometric equations for estimating biomass in agricultural landscapes: I. Aboveground biomass , 2012 .

[4]  Min Cao,et al.  Impact of land use and land cover changes on ecosystem services in Menglun, Xishuangbanna, Southwest China , 2008, Environmental monitoring and assessment.

[5]  D. Suprayogo,et al.  PLANT SPECIES DIVERSITY IN RELATION TO CARBON STOCKS AT JANGKOK WATERSHED, LOMBOK ISLAND , 2013 .

[6]  Alex Smajgl,et al.  Environmental stratification to model climate change impacts on biodiversity and rubber production in Xishuangbanna, Yunnan, China , 2014 .

[7]  D. Leckie,et al.  Prediction Models for Estimating the Area, Volume, and Age of Rubber (Hevea brasiliensis) Plantations in Malaysia using Landsat TM Data , 2004 .

[8]  A. Cowie,et al.  Options for including all lands in a future greenhouse gas accounting framework , 2007 .

[9]  Jianchu Xu,et al.  The Rubber Juggernaut , 2009, Science.

[10]  Guirui Yu,et al.  Rubber plantations act as water pumps in tropical China , 2011 .

[11]  S. Goetz,et al.  Estimated carbon dioxide emissions from tropical deforestation improved by carbon-density maps , 2012 .

[12]  A. Prokushkin,et al.  Critical analysis of root : shoot ratios in terrestrial biomes , 2006 .

[13]  P. Fearnside,et al.  TROPICAL DEFORESTATION AND GREENHOUSE-GAS EMISSIONS , 2004 .

[14]  Yuehong Zhang,et al.  Bilingual (multilingual) publications and duplicate publications: for or against? , 2013 .

[15]  Vanessa Helena de Souza Zago,et al.  HDL Size is More Accurate than HDL Cholesterol to Predict Carotid Subclinical Atherosclerosis in Individuals Classified as Low Cardiovascular Risk , 2014, PloS one.

[16]  Takeshi Tange,et al.  Changes in carbon storage in fallow forests in the tropical lowlands of Borneo , 2000 .

[17]  Meine van Noordwijk,et al.  Carbon stock assessment for a forest-to-coffee conversion landscape in Sumber-Jaya (Lampung, Indonesia): from allometric equations to land use change analysis , 2002 .

[18]  Philip M Fearnside,et al.  Comment on "Determination of Deforestation Rates of the World's Humid Tropical Forests" , 2003, Science.

[19]  Reiner Zimmermann,et al.  Effects of elevation and land use on the biomass of trees, shrubs and herbs at Mount Kilimanjaro , 2015 .

[20]  Sandra A. Brown,et al.  Monitoring and estimating tropical forest carbon stocks: making REDD a reality , 2007 .

[21]  D. W. Nelson,et al.  Total Carbon, Organic Carbon, and Organic Matter 1 , 1982 .

[22]  Charles H. Cannon,et al.  Can carbon-trading schemes help to protect China's most diverse forest ecosystems? A case study from Xishuangbanna, Yunnan , 2014 .

[23]  Wei Zhao,et al.  Managing Carbon Sinks in Rubber (Hevea brasilensis) Plantation by Changing Rotation length in SW China , 2014, PloS one.

[24]  Jefferson Fox,et al.  Current trends of rubber plantation expansion may threaten biodiversity and livelihoods , 2015 .

[25]  Philip M. Fearnside,et al.  Global Warming and Tropical Land-Use Change: Greenhouse Gas Emissions from Biomass Burning, Decomposition and Soils in Forest Conversion, Shifting Cultivation and Secondary Vegetation , 2000 .

[26]  M. Kirschbaum,et al.  Temporary Carbon Sequestration Cannot Prevent Climate Change , 2006 .

[27]  Lindsay A. Turnbull,et al.  How to fit nonlinear plant growth models and calculate growth rates: an update for ecologists , 2012 .

[28]  J. Deckers,et al.  World Reference Base for Soil Resources , 1998 .

[29]  Akihiko Kuze,et al.  Toward accurate CO2 and CH4 observations from GOSAT , 2011 .

[30]  M. Onaindia,et al.  Use of native species to improve carbon sequestration and contribute towards solving the environmental problems of the timberlands in Biscay, northern Spain. , 2013, Journal of environmental management.

[31]  Tang Jian,et al.  BIOMASS AND ITS ALLOCATION IN TROPICAL SEASONAL RAIN FOREST IN XISHUANGBANNA, SOUTHWEST CHINA , 2007 .

[32]  S. Dong,et al.  Landscape connectivity dynamics based on network analysis in the Xishuangbanna Nature Reserve, China , 2014 .

[33]  A. Ziegler,et al.  Swidden, rubber and carbon: Can REDD+ work for people and the environment in Montane Mainland Southeast Asia? , 2014 .

[34]  Zhuang-Fang Yi,et al.  Developing indicators of economic value and biodiversity loss for rubber plantations in Xishuangbanna, southwest China: A case study from Menglun township , 2014 .

[35]  Huabin Hu,et al.  Agrobiodiversity loss and livelihood vulnerability as a consequence of converting from subsistence farming systems to commercial plantation‐dominated systems in Xishuangbanna, Yunnan, China: A household level analysis , 2010 .

[36]  Jusheng Jiang,et al.  Variation of soil fertility and carbon sequestration by planting Hevea brasiliensis in Hainan Island, China. , 2007, Journal of environmental sciences.

[37]  Hongmei Li,et al.  Past, present and future land-use in Xishuangbanna, China and the implications for carbon dynamics , 2008 .

[38]  A. Chidthaisong,et al.  Greenhouse gas emissions and carbon stock changes in rubber tree plantations in Thailand from 1990 to 2004 , 2013 .

[39]  Jinwei Dong,et al.  Mapping tropical forests and rubber plantations in complex landscapes by integrating PALSAR and MODIS imagery , 2012 .

[40]  C. Cannon,et al.  Increasing tree cover while losing diverse natural forests in tropical Hainan, China , 2014, Regional Environmental Change.

[41]  Jefferson Fox,et al.  Mapping rubber tree growth in mainland Southeast Asia using time-series MODIS 250 m NDVI and statistical data , 2012 .

[42]  Jianchu Xu,et al.  Landscape transformation through the use of ecological and socioeconomic indicators in Xishuangbanna, Southwest China, Mekong Region , 2014 .

[43]  Thanh Tuan Nguyen,et al.  Design of a GIS and multi-criteria based land evaluation procedure for sustainable land-use planning at the regional level , 2015 .

[44]  J. Sauerborn,et al.  Designing a sustainable land use scenario based on a combination of ecological assessments and economic optimization , 2014 .

[45]  F. Wagner,et al.  Good Practice Guidance for Land Use, Land-Use Change and Forestry , 2003 .

[46]  Boris Zeide,et al.  Analysis of Growth Equations , 1993 .

[47]  D. Suyamto,et al.  Facilitating agroforestation of landscapes for sustainable benefits: Tradeoffs between carbon stocks and local development benefits in Indonesia according to the FALLOW model , 2008 .

[48]  Zhang Yipin.  Changes of rubber plantation aboveground biomass along elevation gradient in Xishuangbanna. , 2006 .

[49]  Jianchu Xu,et al.  China's new forests aren't as green as they seem , 2011, Nature.

[50]  Min Cao,et al.  Demand for rubber is causing the loss of high diversity rain forest in SW China , 2007, Biodiversity and Conservation.

[51]  Jianhui Huang,et al.  Long-term impacts of land-use change on dynamics of tropical soil carbon and nitrogen pools. , 2004, Journal of environmental sciences.

[52]  Q. Ponette,et al.  Carbon stock in rubber tree plantations in Western Ghana and Mato Grosso (Brazil) , 2008 .

[53]  Georg Cadisch,et al.  Carbon balance of rubber (Hevea brasiliensis) plantations: A review of uncertainties at plot, landscape and production level , 2016 .

[54]  J. Slik,et al.  Traditional forest management has limited impact on plant diversity and composition in a tropical seasonal rainforest in SW China , 2011 .

[55]  Zeng Rong,et al.  Biomass and its estimation model of rubber plantations in Xishuangbanna,Southwest China. , 2009 .

[56]  Bangqian Chen,et al.  Mapping deciduous rubber plantations through integration of PALSAR and multi-temporal Landsat imagery , 2013 .

[57]  Cabon Storage and Distribution of Tropical Seasonal Rain Forest in Xishuangbanna,Yunnan , 2006 .

[58]  Jintao Xu,et al.  China's ecological rehabilitation: Unprecedented efforts, dramatic impacts, and requisite policies , 2006 .

[59]  Jianchu Xu,et al.  Soil Carbon Stocks Decrease following Conversion of Secondary Forests to Rubber (Hevea brasiliensis) Plantations , 2013, PloS one.

[60]  Janet C. Sturgeon,et al.  Functional Links Between Biodiversity, Livelihoods, and Culture in a Hani Swidden Landscape in Southwest China , 2009 .

[61]  Dirk Pflugmacher,et al.  Mapping Rubber Plantations and Natural Forests in Xishuangbanna (Southwest China) Using Multi-Spectral Phenological Metrics from MODIS Time Series , 2013, Remote. Sens..

[62]  Yiping Zhang,et al.  Do the rubber plantations in tropical China act as large carbon sinks , 2014 .

[63]  Q. Ketterings,et al.  Reducing uncertainty in the use of allometric biomass equations for predicting above-ground tree biomass in mixed secondary forests , 2001 .

[64]  Y. Malhi,et al.  Tropical forests and atmospheric carbon dioxide. , 2000, Trends in ecology & evolution.

[65]  Zhili Feng,et al.  The impact of Amomum villosum cultivation on seasonal rainforest in Xishuangbanna, Southwest China , 2006, Biodiversity & Conservation.

[66]  N. Laporte,et al.  Carbon stock corridors to mitigate climate change and promote biodiversity in the tropics , 2014 .

[67]  Alan Grainger,et al.  Dynamics of global forest area: Results from the FAO Global Forest Resources Assessment 2015 , 2015 .

[68]  Tak Fung,et al.  Review of allometric equations for major land covers in SE Asia: Uncertainty and implications for above- and below-ground carbon estimates , 2016 .

[69]  Z. Zhen.  BIOMASS AND NET PRIMARY PRODUCTION OF PRIMARY TROPICAL WET SEASONAL RAINFOREST IN XISHUANGBANNA , 2000 .

[70]  Ruth S. DeFries,et al.  Earth observations for estimating greenhouse gas emissions from deforestation in developing countries , 2007 .

[71]  Carolien Kroeze,et al.  Revised 1996 IPCC Guidelines for National Greenhouse Gas Inventories : Chapter 4. Agriculture , 1997 .

[72]  Ruchi Badola,et al.  A review of protocols used for assessment of carbon stock in forested landscapes , 2012 .

[73]  Bangqian Chen,et al.  Spatio-temporal prediction of leaf area index of rubber plantation using HJ-1A/1B CCD images and recurrent neural network , 2015 .

[74]  Meine van Noordwijk,et al.  Land sparing or sharing? Exploring livestock fodder options in combination with land use zoning and consequences for livelihoods and net carbon stocks using the FALLOW model , 2012 .

[75]  K. Jusoff,et al.  New Approaches in Estimating Rubberwood Standing Volume Using Airborne Hyperspectral Sensing , 2009 .

[76]  Jian-Wei Tang,et al.  ECOSYSTEM CARBON STORAGE OF TROPICAL FORESTS OVER LIMESTONE IN XISHUANGBANNA, SW CHINA , 2012 .

[77]  A. Ziegler,et al.  Uncertainty in below-ground carbon biomass for major land covers in Southeast Asia , 2013 .

[78]  Yu Cuiping,et al.  Dynamic assessments of plant biomass and carbon storage during the production cycle of tea gardens , 2013 .

[79]  John B. Vogler,et al.  Land-Use and Land-Cover Change and Farmer Vulnerability in Xishuangbanna Prefecture in Southwestern China , 2005, Environmental management.