Significance: Identifying and explaining regional differences in tropical forest dynamics, structure, diversity, and composition are critical for anticipating region-specific responses to global environmental change. Floristic classifications are of fundamental importance for these efforts. Here we provide a global tropical forest classification that is explicitly based on community evolutionary similarity, resulting in identification of five major tropical forest regions and their relationships: ( i ) Indo-Pacific, ( ii ) Subtropical, ( iii ) African, ( iv ) American, and ( v ) Dry forests. African and American forests are grouped, reflecting their former western Gondwanan connection, while Indo-Pacific forests range from eastern Africa and Madagascar to Australia and the Pacific. The connection between northern-hemisphere Asian and American forests is confirmed, while Dry forests are identified as a single tropical biome.

The farmers and rural communities, world over, have contributed greatly in management of agrobiodiversity including plant genetic resources for food and agriculture (PGRFA). It is well accepted now that the efforts of farming communities in creation, conservation, exchange, and enhancement of PGR should be recognized and strengthened. Farmers’ access and rights over seeds are considered an essential component of food sovereignty. In the present article, we discuss the aspects of farmers’ rights, the community level seed systems, food sovereignty and the potential of farmer household production and dietary diversification in combating malnutrition and community health promotion with regard to farming communities of Uttarakhand hills in north-western India. Salient findings of two case studies, on farmers’ varieties documentation and registration, and the potential of local food systems in addressing community health and nutrition were used to particularly showcase the nutritional contribution of native foods in the context of sustainable food-based approaches to community health and nutrition. Further, the need of a proactive alliance was suggested between local communities and their key allies collaboratively creating a research and advocacy agenda in support of agrobiodiversity and the revival of local food systems and landscapes within the broader framework of food sovereignty.

This study investigated the potential role of a nitrogen-fixing early-coloniserAlnus NepalensisD. Don (alder) in driving the changes in soil bacterial communities during secondary succession. We found that bacterial diversity was positively associated with alder growth during course of ecosystem development. Alder development elicited multiple changes in bacterial community composition and ecological networks. For example, the initial dominance of actinobacteria within bacterial community transitioned to the dominance of proteobacteria with stand development. Ecological networks approximating species associations tend to stabilize with alder growth.Janthinobacterium lividum,Candidatus XiphinematobacterandRhodoplaneswere indicator species of different growth stages of alder. While the growth stages of alder has a major independent contribution to the bacterial diversity, its influence on the community composition was explained conjointly by the changes in soil properties with alder. Alder growth increased trace mineral element concentrations in the soil and explained 63% of variance in the Shannon-diversity. We also found positive association of alder with late-successionalQuercus leucotrichophora(Oak). Together, the changes in soil bacterial community shaped by early-coloniser alder and its positive association with late-successional oak suggests a crucial role played by alder in ecosystem recovery of degraded habitats.

Animal husbandry of agropastoral communities in the mountainous region of Leh, Ladakh, has been transformed in response to socio-economic and geo-political changes. This study investigates the current state of agropastoralism in the Trans-Himalaya of Leh, Ladakh, focusing on two objectives: understanding grazing management practices and examining socio-environmental factors affecting traditional pastoral livelihoods. Through a mixed-methods approach, including interviews and focus group discussions, this study explores resource utilisation patterns and decision-making processes within local communities and institutions based on a comparative approach in three pastoral areas of Ladakh. The resource utilisation pattern differs from village to village as a response to meet seasonal fodder demands; accordingly, high-altitude pastures are assessed in winter and/or summer seasons. Key stresses to the perpetuation of traditional pastoral knowledge include livelihood diversification, increasing dependence upon exogenous food production system and diminishing significance of traditional livelihood practices with improved connectivity, higher education aspirations and development of tourism and military services. Broadly, changes could be perceived from the abandonment of regular seasonal migration to pasturelands, in livestock composition and size and the decreasing number of households practising animal herding. Apart from socio-economic and developmental pressures, pastoral practices are simultaneously threatened by wild predators as well as by global warming-induced occurrence of extreme climatic events and pest attacks. While pastoral practices are carried on by a limited number of households in the three detailed study sites, knowledge pertaining to resource management, pastureland system and grazing pattern is still intact considering the resource seasonality and range of social and environmental pressures the region experiences. Ladakh’s agropastoral practices, rooted in local ecological knowledge, face challenges from socio-economic changes, risking climate resilience, ecosystem degradation, cultural loss and food security for agropastoral communities and broader societal contexts. Thus, it becomes vital to safeguard these indigenous livelihood practices and to promote a participatory approach to enhance capacity building for the continuation of the practice, which could contribute to local economies in areas with similar socio-environmental settings.