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2020 The Authors. Maternal & Child Nutrition published by John Wiley & Sons, Ltd. Solomon Islands, like many Pacific Island nations, suffer from the burden of malnutrition. External drivers including population growth, declining agriculture and fisheries productivity and global food trade have contributed to the transition to greater reliance on imported foods. Globally, diets are recognized as both a cause of and solution to the burden of malnutrition. Using a mixed-method approach this study assessed nutritional status and key determinants of malnutrition among women and young children in rural Solomon Island communities. Quantitative 24-hour recall surveys identified diets of women and young children in these communities to be very limited in diversity. Typical daily diets comprised of fish, sweet potato (and/or rice) and slippery cabbage (a leafy green) usually boiled in coconut milk or baked. Participatory research using problem tree and biocultural approaches identified basic determinants of poor diets and opportunities to address these challenges. We highlight three domains of opportunity to improve diets across multiple scales; 1) improve nutrition-sensitive agriculture and fisheries to produce and distribute diverse, productive and nutrient rich foods; 2) nutrition education and empowerment, focusing on the first 1000 days of life, to influence and inform choices regarding food consumption; and 3) reducing the consumption of imported, energy-rich nutrient poor foods through national and regional policies. These multi-scale domains highlight that food system approaches that strengthen integrated policy and empower people are essential for healthy and sustainable diets in Solomon Islands and more broadly in the Pacific region.

Our species displays remarkable linguistic diversity. Although the uneven distribution of this diversity demands explanation, the drivers of these patterns have not been conclusively determined. We address this issue in two steps: First, we review previous empirical studies whose authors have suggested environmental, geographical, and sociocultural drivers of linguistic diversification. However, contradictory results and methodological variation make it difficult to draw general conclusions. Second, we outline a program for future research. We suggest that future analyses should account for interactions among causal factors, the lack of spatial and phylogenetic independence of the data, and transitory patterns. Recent analytical advances in biogeography and evolutionary biology, such as simulation modeling of diversity patterns, hold promise for testing four key mechanisms of language diversification proposed here: neutral change, population movement, contact, and selection. Future modeling approaches should also evaluate how the outcomes of these processes are influenced by demography, environmental heterogeneity, and time.

Our species displays remarkable linguistic diversity. Although the uneven distribution of this diversity demands explanation, the drivers of these patterns have not been conclusively determined. We address this issue in two steps: First, we review previous empirical studies whose authors have suggested environmental, geographical, and sociocultural drivers of linguistic diversification. However, contradictory results and methodological variation make it difficult to draw general conclusions. Second, we outline a program for future research. We suggest that future analyses should account for interactions among causal factors, the lack of spatial and phylogenetic independence of the data, and transitory patterns. Recent analytical advances in biogeography and evolutionary biology, such as simulation modeling of diversity patterns, hold promise for testing four key mechanisms of language diversification proposed here: neutral change, population movement, contact, and selection. Future modeling approaches should also evaluate how the outcomes of these processes are influenced by demography, environmental heterogeneity, and time.

The traditional ecological knowledge (TEK) of local and indigenous people supports the resilience of social-ecological systems and is an important aspect of global biocultural diversity. However, TEK is at risk of erosion amid social and ecological change, and may be threatened by homogenising influences such as formal school systems. Loss of TEK is of particular concern in countries such as Vanuatu, a culturally diverse nation where TEK is a critical component of resource management, medicinal practice, and adaptive capacity. This thesis aims to fill four key literature gaps surrounding the variation, transmission, and maintenance of TEK, and is situated in four rural communities on Malekula Island, Vanuatu. This research employs an interdisciplinary mixed-methods approach across four core chapters. The first uses multi-model inferencing to show that systems of TEK are dynamic and complex, and that change is variable across domains of knowledge and segments of the population. Data in this chapter indicate that ethnomedical knowledge is at risk of erosion in younger age cohorts. The second core chapter shows that the cultural transmission of TEK is predominantly vertical in nature (i.e. passed from parent to child), is initiated during the early teens, and that some skills (such as the carving of ceremonial items) appear to be less salient to younger age cohorts. This chapter also notes a changing developmental niche for TEK transmission, and suggests that changes in both the setting and strategies for knowledge transmission are key mechanisms that drive TEK variation. The third and fourth core chapters discuss aspects of TEK maintenance: first, by examining top-down strategies for TEK revitalisation by eliciting local perceptions of the value of TEK to formal school systems; and second, by identifying the triggers and barriers to bottom-up, in situ TEK maintenance in local organisations known as 'kastom schools'. Both approaches have potential to conserve aspects o, Long fulap ples long world, kastom save blong envaeroment (KSBE) hemi stap lus. Ol jenis ia bambae i mekem i hard blong ol man blong lukaotem ol risos blong hem, mo bambae i mekem i hard blong ol jeneresen long fiuja blong stap strong taem envaeromen i jenis. Vanuatu hemi wan ples we i gat fulap difren kalja mo difren kaen envaeromen, mo kastom mo tredisen oli gat fulap importance long laef long ol man. I gat fulap rison we from wanem KSBE hemi important long Vanuatu: sam example olsem saed long lukaotem ol risos, saed long givim meresin long ol man, mo saed long givhan long ol man blong stap strong taem envaeromen i jenis. Be long Vanuatu, i gat wan problem, from we KSBE mo kastom i save lus, from we fulap niufala samting i kam insaed, ol envaeromen i jenis, mo ol youngfala oli no lanem gud ol save blong ol bubu blong olgeta. Risej ia i stap givhan blong saed long lanem save hao nao KSBE i stap lus, mo hao nao yumi save lukaotem hem mo mekem se i stap oltaem. Mi bin work long fofala komuniti long Malekula Island, mo mi bin traem save trifala samting. Namba wan samting, mi stap traem luk sipos KSBE hemi stap lus, mo wanem kaen samting i stap mekem se KSBE i lus. Mi bin yusum wan kaen interviu wetem 177 man mo woman long West Coast Malekula, mo mi askem evri wan blong telemaot fulap samting, olsem ol lif blong meresin. Ol risal oli telem se ol youngfala oli gat fulap KSBE, be olgeta oli no gat save olsem ol oldfala. Ol oldfala nomo oli gat save blong medel bus, be ol youngfala oli no stap lanem ol samting ia. Save ia i stap lus bigwan wetem ol man we oli go long market fulap mo we oli no laekem blong toktok lanwis tumas. Namba tu samting, mi stap traem luk hao nao ol man mo woman oli stap lanem ol save blong olgeta. Mi faendem se fulap long ol man mo woman oli lanem long mama mo papa blong olgeta, be mi luk save se ol fasin blong tijim ol difren kaen KSBE hemi stap jenis. Namba tri samting, mi stap luk long saed long hao nao yumi save lukaotem ol KSBE mo mekem se i s