An approach for assessing adaptive capacity to climate change in resource dependent communities in the Nikachu watershed, Bhutan

摘要

Vulnerability to climate change is a function of exposure, sensitivity and adaptive capacity. Econometric and indicator-based approaches have been used to assess vulnerability at regional, national and global scales. However, these approaches often fail to capture how vulnerability varies within regions and communities. Within regions there is often little capacity to distinguish between exposure and sensitivity, while there is potentially considerable variability in adaptive capacity. This study presents a new approach for assessing adaptive capacity at household and village-levels by combining econometric data and landscape ecology measures to generate new types of indicators that provide new insights into local level adaptive capacity. Livelihood security is a key contributor to adaptation and we used the sustainable livelihood framework as a basis for analysis. We combined social survey information with spatial data on different livelihood capitals and integrated these using multivariate statistical methods to generate indicators of adaptive capacity for households and villages. A mixed method approach was used in two contrasting localities in the Nikachu watershed in central Bhutan to gather social and economic data and spatial data on landscape variables. A total of 144 households were selected through simple random sampling and were interviewed across 22 villages in the watershed. Indicators revealed a strong link between adaptive capacity and landscape position. Households at higher elevations generally had lower adaptive capacity, and therefore higher vulnerability to climate change, due to differences in physical, financial, natural and human capitals. These households and villages had lower diversity in income sources, greater dependence on natural resources, less education and training, less access to infrastructure (such as roads), and access to markets than households at lower elevations. Gender was also important, with female headed households having lower adaptive capacity scores. However, some higher elevation households had higher adaptive capacity scores than others due to their capacity to collect the valuable insect fungus, Ophiocordyceps sinensis, from high altitude meadows. These new indicators provide insights into how adaptive capacity varies across scales. They can be used to identify policies and actions to improve adaptive capacity of vulnerable households and communities.