This study combines qualitative and quantitative research to examine perceptions held by rural households in Northern Ghana regarding the value of traditional ecological knowledge (TEK) in the management of ecosystem services. Key informant interviews (n = 14), household questionnaire surveys (n = 195), field observations, and dissemination meetings were employed to collect data. Results suggest the regular use of different but interrelated forms of TEK, i.e. taboos and totems, customs and rituals, rules and regulations, and traditional protected areas, to manage ecosystem services through existing sociocultural mechanisms. However, household awareness of TEK did not equate with compliance. A wide discrepancy in views on TEK was observed across surveyed households. A generalized linear model (GLM) regression analysis suggests age to be the most significant determinant of TEK awareness and compliance. Compared with mature and younger adults, the elderly appear more likely to be aware of and comply with characterized TEK systems. Notwithstanding these findings, the use of traditional protected areas as a form of TEK appears to be highly valued by the majority of survey participants. Demand-led research aimed at examining TEK's role in the face of changing socioeconomic and environmental conditions can contribute to the formulation and implementation of policy-relevant strategies.
The concept of threshold can potentially be applied to conservation planning of species, habitats, and ecosystems. It also has significance in managing socialecological systems for resilience. However, our understanding and use of threshold has been scattered among various disciplines, and the link to conservation planning and social-ecological system management has not been strongly established. The review of the use of threshold in various disciplines reveals that the term is used in a similar manner in both natural and social sciences: a threshold is a point or a zone on an independent variable, and if it is crossed, a sudden, large change in the state of a dependent variable occurs. Even a small change in the independent variable brings this drastic change; nonlinear relationship characterizes the threshold response. Thresholds also separate alternative regimes in a social-ecological system. The discussion of the application of threshold concept to watershed planning concludes that although using one threshold value of impervious surfaces in a watershed to regulate new developments and retrofit old ones is a cost-effective method, a more integrated approach is needed. The use of habitat amount threshold to conserve species promotes proactive planning that would prioritize areas for protection before the threshold is reached and would restore habitat based on the threshold target. However, species-specific data to decide on the threshold is often lacking, and the identification of thresholds is not straightforward. Nonetheless, the concept of threshold is appealing for proactive planning and significant in managing social-ecological systems for resilience.
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