| 摘要 | 第9-12页 |
| Abstract | 第12-14页 |
| Chapter 1 Introduction | 第16-32页 |
| 1.1 Island ecosystem | 第16-20页 |
| 1.1.1 Formation of fragmented habitats | 第16页 |
| 1.1.2 The attribute of island biogeography | 第16-18页 |
| 1.1.3 Effect of fragmented forest on ecosystem biodiversity | 第18-19页 |
| 1.1.4 Effects of fragmentation on forest in Thousand Island Lake region | 第19-20页 |
| 1.2 Litter decomposition in forest ecosystem | 第20-26页 |
| 1.2.1 Importance of litter decomposition | 第20-21页 |
| 1.2.2 The processes of litter decomposition | 第21页 |
| 1.2.3 Factors affect litter decomposition | 第21-25页 |
| 1.2.4 Characteristics of litter decomposition in fragmented environments | 第25-26页 |
| 1.3 Atmospheric nitrogen deposition | 第26-29页 |
| 1.3.1 Effects of N deposition on environment | 第27页 |
| 1.3.2 Effects of N deposition on litter decomposition | 第27-29页 |
| 1.4 Soil microbial biomass and extracellular enzyme activity | 第29页 |
| 1.5 Thesis aim | 第29-32页 |
| Chapter 2 The potential effects of island attribute on soil fauna and microbialactivities in Thousand Island Ecosystems | 第32-65页 |
| 2.1 Introduction | 第32-34页 |
| 2.2 Materials and methods | 第34-39页 |
| 2.2.1 Study region | 第34-35页 |
| 2.2.2 Island attributes variables | 第35-36页 |
| 2.2.3 Field experiment | 第36-37页 |
| 2.2.4 Determination of soil property and extracellular enzymes activities | 第37-39页 |
| 2.2.5 Statistical analysis | 第39页 |
| 2.3 Result | 第39-60页 |
| 2.3.1 The relationship between island attribute and soil environments | 第39-40页 |
| 2.3.2 Invertebrate communities | 第40-42页 |
| 2.3.3 Soil microbial communities | 第42页 |
| 2.3.4 The relationships among soil fauna, microbial communities and environment factors | 第42-60页 |
| 2.4 Discussion | 第60-65页 |
| Chapter 3 Indoor evidence for the contribution of soil microbes andenvironments to the decomposition of Pinus massoniana and Castanopsissclerophylla litter from Thousand Island Lake | 第65-85页 |
| 3.1 Introduction | 第65-67页 |
| 3.2 Materials and methods | 第67-72页 |
| 3.2.1 Study site | 第67-69页 |
| 3.2.2 Sample collection | 第69-70页 |
| 3.2.3 Decomposition experiment | 第70页 |
| 3.2.4 Soil physiochemical properties and litter decomposition parameter | 第70-71页 |
| 3.2.5 Data analyses | 第71-72页 |
| 3.3 Results | 第72-80页 |
| 3.3.1 Litter decomposition | 第72-74页 |
| 3.3.2 Substrate-induced respiration (SIR) in different soils | 第74-76页 |
| 3.3.3 Variation of soil and litter features in all treatments | 第76-77页 |
| 3.3.4 Soil enzyme activities in different treatments | 第77-80页 |
| 3.4 Discussion | 第80-85页 |
| Chapter 4 Insight into the effect of nitrogen deposition on the decomposition ofPinus massoniana and Castanopsis sclerophylla litter from Thousand Island Lake | 第85-106页 |
| 4.1 Introduction | 第85-88页 |
| 4.2 Materials and methods | 第88-92页 |
| 4.2.1 Study site | 第88-89页 |
| 4.2.2 Sample collection and microcosm experimental design | 第89-90页 |
| 4.2.3 Chemical analysis and decomposition parameter | 第90-91页 |
| 4.2.4 Statistical analyses | 第91-92页 |
| 4.3 Results | 第92-100页 |
| 4.3.1 Litter decomposition rate response to N subsidy | 第92-94页 |
| 4.3.2 Substrate-induced respiration(SIR) | 第94-95页 |
| 4.3.3 Soil pH among islands | 第95页 |
| 4.3.4 Soil enzyme activities | 第95-100页 |
| 4.4 Discussion | 第100-106页 |
| Chapter 5 Summary | 第106-109页 |
| 5.1 Conclusions | 第106-108页 |
| 5.2 Prospects | 第108-109页 |
| References | 第109-134页 |
| List of publications | 第134-135页 |
| Acknowledgements | 第135-136页 |
