Two new species of Oreocharis Benth. from Fan Si Pan, the highest mountain in Vietnam (Sa Pa) are described and illustrated. Oreocharis grandiflora W.H.Chen, Q.H.Nguyen & Y.M.Shui, is similar to O. flavida Merr. from Hainan province, China, but differs mainly by its larger and infundibuliform corolla, stamens adnate to the base of the corolla tube and stamens coherent in two pairs. The second, Oreocharis longituba W.H.Chen, Q.H.Nguyen & Y.M.Shui, is similar to O. hirsuta Barnett, endemic to northern Thailand, but mainly differs in its pubescence, coherent stamens and glabrous filaments.

The Sino-Vietnamese border region is known for having unique and high levels of biodiversity. Global climate change is expected to alter the region's climate and related changes in habitats and ecosystems will result in shifts in species' distributions and increase the likelihood of local and global extinctions. Ecological Niche Models (ENMs) are widely used to predict the magnitude of potential species distribution shifts in response to climate change and inform conservation planning. Here, we present climate-based ENM projections of future climatically suitable habitat for the Daguo Mulian tree (Magnolia grandis), a critically endangered species of high ecological and cultural value in the Sino-Vietnamese border region. Projections of modeled climatically suitable habitat for M. grandis, both for the 2050s and 2070s, suggest significant habitat loss within conservation areas, and a defining shift in the location of suitable habitat. Future projections are conservative and do not account for dispersal limitations or species interactions or other factors, and thus may overestimate potential shifts and underestimate losses. Our results suggest that current conservation management efforts for M. grandis, which include community forest conservation monitoring combined with nursery cultivation efforts, can continue to have success if implemented in an adaptive management framework with long-term research and monitoring to inform forward-thinking decisions with future climatic suitability in mind. The results also underline how endangered species' distributions may shift across borders as they track suitable climates, emphasizing that nations will need to cooperate to effectively manage threatened species and habitats and prevent extinctions. Highlights • Changes to habitats and ecosystems from climate change will result in shifts in species' distributions and increase the likelihood of local and global extinctions, especially for species with populations that are already decreasing. • We built Ecological Niche Model (ENM) projections of future climatically suitable habitat for the Daguo Mulian tree (Magnolia grandis), a critically endangered species of high ecological and cultural value, to predict the magnitude of potential distribution shifts in response to climate change. • Our projections point to significant habitat loss within conservation areas, as well as a potentially considerable shift in the location of suitable habitat, but also that current conservation management efforts for M. grandis, which include community forest conservation monitoring and nursery cultivation efforts, can have success if implemented in an adaptive management framework with future climatic suitability in mind. • A key component to the successful conservation management of M. grandis and other transboundary endangered species under climate change will be effective cross-border conservation partnerships.

This study aims at exploring the effects of customer’s personal factors and characteristics of brand community on customers’ behaviors in virtual brand community. The data were collected from customers of virtual brand communities in Vietnamese context via a survey. The data show that among the customer’s personal factors, customer ability has the largest impact on customer active behaviors in virtual brand community while customer motivation and opportunity have smaller significant influences on customer behaviors. Regarding the characteristics of virtual brand community, information quality posted in virtual community has the most dramatic effect on customer involvement in active behaviors. System quality is also relevant to customer behaviors, yet virtual interactivity and rewards are unrelated to customer activity involvement. With the findings, research shows useful suggestions for businesses in Vietnam in their efforts to understand the impact of customer behavior in the virtual community.