A b s t r a c t. Cocoa remains in the same field for decades, resulting in plantations dominated with aging trees growing on variable and depleted soils. We determined the spatio-temporal variability of key soil properties in a (5.81 ha) field from the International Cocoa Genebank, Trinidad using geophysical methods. Multi-year (2008Multi-year ( -2009) measurements of apparent electrical conductivity at 0-0.75 m (shallow) and 0.75-1.5 m (deep) were conducted. Apparent electrical conductivity at deep and shallow gave the strongest linear correlation with clay-silt content (R = 0.67 and R = 0.78, respectively) and soil solution electrical conductivity (R = 0.76 and R = 0.60, respectively). Spearman rank correlation coefficients ranged between 0.89-0.97 and 0.81-0.95 for apparent electrical conductivity at deep and shallow, respectively, signifying a strong linear dependence between measurement days. Thus, in the humid tropics, cocoa fields with thick organic litter layer and relatively dense understory cover, experience minimal fluctuations in transient properties of soil water and temperature at the topsoil resulting in similarly stable apparent electrical conductivity at shallow and deep. Therefore, apparent electrical conductivity at shallow, which covers the depth where cocoa feeder roots concentrate, can be used as a fertility indicator and to develop soil zones for efficient application of inputs and management of cocoa fields.
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.
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