Bøger af Weijun Fu

Spatial pattern information of carbon (C) density and storage in forest ecosystems plays an important role in the evaluation of C sequestration potential and forest management practices. However, such information related to subtropical forests still remain poorly understood. In this boook, the Moran¿s I, geostatistics and geographical information system (GIS) techniques were applied to reveal the spatial pattern of C stocks in forest ecosystems. Moreover, the typical forest types such as Moso Bamboo forest, Chinese hickory plantation et al. were also chosen to study the carbon distribution and its controlling factors. Our study revealed that in order to enhance the C sequestration potentials, forest management should focus on the selection of tree species, management of stand-age structures and implementation of sustainable afforestation and reforestation practices in the future.

In order to better understand the spatial variation of metals in urban soils, samples were collected from four urban parks: a roadside sports ground, a traditional bonfire site, a historical landfilling site and a city park in both Galway and Dublin City. Soil geochemical variables were determined using different chemical techniques (e.g. Portable X-ray fluorescence and, Inductively Coupled PlasmäEmission Spectroscopy). The results were analyzed using conventional statistics, geostatistics and a geographic information system (GIS). Like most European countries, there are many public sports grounds and parks in Ireland; however few previous studies concerning metal contamination have been carried out in these public amenities. The study provides the total and bioavailable metal concentrations in urban soils in Ireland, which not only indicated their current contaminative status, but also can be used for comparative purposes in future pollution assessment studies. These results are particularly useful for policy development and management practices in public spaces and sports grounds in urban areas.

Spatial pattern information of carbon (C) density and storage in forest ecosystems plays an important role in the evaluation of C sequestration potential and forest management practices. However, such information related to subtropical forests still remain poorly understood. Zhejiang Province is located in a typical subtropical region of southeastern China, as well as has abundant forest resources and high forest productivity. Up to date, several research on forest resources and C storage in Zhejiang Province have been conducted in the recent decade. However, there is no accurate and complete report for subtropical region of Chinäs Zhejiang Province, including vegetation, soil, litter, and dead wood layer. The main objectives of this study were (1) to characterize the spatial variation of C density in forest ecosystems, and (2) to accurately estimate the C storage in forest ecosystems in Zhejiang Province of southeastern China. It is expected that the findings of this study can guide sustainable forest management practices in subtropical forest regions.