Plant-pollinator networks in Australian urban bushland remnants are not structurally equivalent to those in residential gardens

Urbanisation is a prominent and increasing form of land-use change, with the potential to disrupt the interactions between pollinators such as bees and the flowering plants that they visit. This in turn may cause cascading local extinctions and have consequences for pollination services. Network approaches go beyond simple metrics of abundance and species richness, enabling understanding of how the structure of plant-pollinator communities are affected by urbanisation. Here we compared pollination networks between native vegetation (bushland) remnants and residential gardens in the urbanised region of the southwest Australian biodiversity hotspot. Across fourteen sites, seven per habitat, plant-bee visitor networks were created from surveys conducted monthly during the spring-summer period over two years. Extinction slope (a measure of how extinctions cascade through the network), and network robustness and nestedness were higher for bushland remnants, suggesting that networks in bushland remnants had greater functional integrity, but if disrupted, more cascading extinctions could occur. In contrast, niche overlap between pollinators was higher in residential gardens, suggesting greater competition for resources. Most species-level properties did not differ between habitats, except for normalised degree, which was higher in bushland remnants. In conclusion, it appears that pollination networks in managed residential gardens are not structurally equivalent with those in bushland remnants. This has implications for conservation of wild bee assemblages in this biodiversity hotspot, and suggests removal of remnant native vegetation for residential development could disrupt the integrity of plant-pollinator assemblages.

     

为会员交流提供国际化平台

截至2010年底，美国电气电子工程师学会（IEEE）会员人数超过40万，这是学会会员人数有史以来第一次突破40万，也是学会连续第七年实现会员人数增长。之所以能够吸收这么多会员，是因为学会为会员提供了极具价值的服务——为会员的交流提供了国际化的平台，学会的价值也在于此。     

The dynamic,complex and diverse living and care arrangements of young New Zealanders: implications for policy

The living arrangements of young people in New Zealand are diverse and often complex. In this article we report the range of care and living arrangements of 209 15-year-old New Zealanders, 47 of whom identified as Māori. These young people were participants in the second generation of a cohort study. Data were collected from their parents via a life history calendar and analysed for variety and consistency of care arrangements, household membership and transitions. Few participants had a consistent pattern of parental care arrangements and most had experienced multiple changes in household composition and frequent changes of address. We conclude that the whānau/family lives of many young New Zealanders are complex and dynamic. These observations contrast with the conventional notions of family life that form the basis for New Zealand’s family policies. We argue that social policies and services impacting on young people need to reflect the lived reality of young people if they are to meet young people’s needs.     

New Zealand’s engagement with the Five Ways to Wellbeing: evidence from a large cross-sectional survey

ABSTRACT

The Five Ways to Wellbeing were developed in 2008 as a set of simple daily practices for individuals to improve their wellbeing. While there is some evidence to support the association between individual practices and wellbeing, it is unknown whether engaging in multiple practices – and in certain combinations – is associated with higher levels of wellbeing. A survey was undertaken with 10,012 adults throughout Aotearoa, New Zealand, to assess individual wellbeing and participation in the Five Ways to Wellbeing (Connect, Give, Take Notice, Keep Learning and Be Active). Wellbeing was assessed with the Flourishing Scale (Md?=?46, IQR 39–49). Three objectives explored the cross-sectional association between the Five ways to Wellbeing and wellbeing: (1) multiple wellbeing practices and wellbeing, (2) clustering of multiple wellbeing practices, and (3) wellbeing practices as predictors of wellbeing. Results show that levels of wellbeing increased with each additional practice (rho?=?.53, p?<?.001), regardless of the combination. However, the most important predictors of wellbeing were Keep Learning (β?=?.23, p?<?.001) and Take Notice (β?=?.22, p?<?.001). Studies investigating ways to increase participation in the Five Ways to Wellbeing are warranted to promote wellbeing in Aotearoa.