摘要
The North East China Transect (NECT) is an exemplary region of landmass running along the line of 43°30′ North Latitude and caught between 112° and 130°30′ East Longtitude, and is being sampled by the International Geosphere-Biosphere Program (IGBP) for today’s study on global change. So far, it has already been listed in the first set of IGBP-sponsored transects, becoming a key theatre and "hot spot" for probing terrestrial ecosystems. In terms of biota, the nearly 1,600-kilometre-long tract is located in a mid-latitude zone, featuring a vegetational transition from a temperate timberland of evergreen coniferous forests and broadleaved deciduous forests to a mild-temperate steppe. According to the norms of biome types, it consists of three subzones: meadow steppe, typical steppe and desert steppe in a continuous east-to-west spatial sequence. There are four ecological stations supported by a great number of permanent samples, long-term plots and an enormous build-up of experimental data along
The North East China Transect (NECT) is an exemplary region of landmass running along the line of 43°30′ North Latitude and caught between 112° and 130°30′ East Longtitude, and is being sampled by the International Geosphere-Biosphere Program (IGBP) for today's study on global change. So far, it has already been listed in the first set of IGBP-sponsored transects, becoming a key theatre and 'hot spot' for probing terrestrial ecosystems. In terms of biota, the nearly 1,600-kilometre-long tract is located in a mid-latitude zone, featuring a vegetational transition from a temperate timberland of evergreen coniferous forests and broadleaved deciduous forests to a mild-temperate steppe. According to the norms of biome types, it consists of three subzones: meadow steppe, typical steppe and desert steppe in a continuous east-to-west spatial sequence. There are four ecological stations supported by a great number of permanent samples, long-term plots and an enormous build-up of experimental data along the transect. An initial gradient analysis and simulation of the transect for a predicted scenario with a rise in temperature are given, involving its geographical location, deployment of its setups, topography, geomorphology, climate, soil, vege tation and patterns for land use. A dynamic model based on telemetric data and an NPP model have been introduced and tested along the whole transect. This article is to give an initial gradient study and some predictions in the context of global change. In the future, our study on NECT will be enhanced by introducing various research projects including bio-geochemical cycles of water, carbon, nitrogen, phosphorus and the emission of greenhouse gases, structure, functions and dynamics of ecosystems, biodiversity, land use and land coverage, dynamic global vegetation modeling (DGVM), and high-resolution remote-sensing data. It will be a frontier for Global Change & Terrestrial Ecosystems (GCTE) and other IGBP core projects in China.
基金
This research work is jointly subsidied by two research projects entitled"A Predictive Study on the Changing Trend of Life-supporting Environment in China Over the Next 20-50 Years
A Modeling Research on the Responses of China's Terrestrial Ecosys
