Table_1_An influencer pathway framework for sustainable tourism in SIDS ecotourism hotspots: A case of Aripo ecosystems, Trinidad.docx

IntroductionEcotourism hotspots in small island developing states (SIDS) are affected by unsustainable practices characterized by a lack of coordination, management inadequacies, and poor enforcement of policies and regulations. Consequently, depletion of natural resources and reduction in ecosystem value occur, with the undermining of the contribution of tourism to SIDS economies. An ecotourism system that ensures sustainable ecological integrity, economic viability, and social awareness is therefore critical in SIDS.MethodsWe developed an influencer ecotourism pathway framework (IPF) using the Aripo ecosystem as a case study of an ecotourism hotspot by focusing on influencers within a SIDS system to improve collaboration toward the common goal of ecosystem sustainability. The framework was created to reflect the ecosystem attributes and services found in Aripo, the influencers that both negatively and positively impact the environment, possible solutions specific to addressing these negative impacts, and the ecotourism goals of the area.Results and discussionThe framework was used to characterize the natural capital of Aripo in relation to the three (3) main ecosystems: forest, savanna, and man-made Aripo village. The influencer ecotourism framework provides a practical model to be applied for sustainable ecotourism management efforts in tropical small island regions as it identifies ecotourism attributes and ecosystem services, linking them to the potential impacts of influencers on the environment. It also provides useful insights to various influencers about their role in sustainable ecotourism that conserves the natural capital of the destination community while improving socioeconomic conditions.</p

Estimation of soil clay content from hygroscopic water content measurements

Soil texture and the soil water characteristic are key properties used to estimate flow and transport parameters. Determination of clay content is therefore critical for understanding of plot-scale soil heterogeneity. With increasing interest in proximal soil sensing, there is the need to relate obtained signals to soil properties of interest. Inference of soil texture, especially clay mineral content, from instrument response from electromagnetic induction and radiometric methods is of substantial interest. However, the cost of soil sampling and analysis required to link proximal measurements and soil properties, for example, clay mineral content, can sometimes outweigh the benefits of using a fast proximal technique. In this paper, we propose that determination of a soil's hygroscopic water content at 50% atmospheric relative humidity (RH50), which is time and cost efficient, and particularly suitable for developing countries, can act as a useful surrogate for clay content in interpreting soil spatial patterns based on proximal signals. We used standard clays such as kaolinite, illite, and montmorillonite to determine the water release characteristic as a function of hygroscopic water content. We also determined clay content of soils from temperate (Arizona, United States) and tropical (Trinidad) regions using the hydrometer method and hygroscopic water content for soils equilibrated at RH50. We found linear dependence of clay percentage and RH50 for a range of soil mineralogies. Hygroscopic water measurements offer an inexpensive and simple way to estimate site-specific clay mineral content that in turn can be used to interpret geophysical signal data in reconnaissance surveys