Long-term ecological changes in the densely populated rural landscapes of China

摘要: Asia's densely populated agricultural landscapes are undergoing unprecedented ecological changes caused by population growth and adoption of industrial technologies such as fossil fuel chemical fertilizer. Covering nearly 6 × 10 km 2 , these now release more than half global greenhouse gas emissions from land biomass fuel. Measuring processes their in highly heterogeneous village is made difficult very small scale management, with households typically managing many plots using a wide variety inputs methods. This chapter describes the extent landscapes, characterizes spatial heterogeneity, establishes appropriate scales for change measurement, demonstrates methods developed to measure long-term across China. Reliable measurements can be integrating high-resolution (≤1 m) landscape household-level resource management data. These link local use practices regional change, potentially aiding decision-making, but require far greater research effort conventional based on 30-1000 m resolution imagery county or provincial Therefore, multi-scale sampling analysis system was integrate data estimating The strengths weaknesses this approach measuring mediating impacts discussed light preliminary results indicating that increase modernization increasing carbon sequestration landscapes.