The winners and losers of land use intensification: pollinator community disassembly is non-random and alters functional diversity
Article first published online: 22 MAY 2014
© 2014 John Wiley & Sons Ltd
Diversity and Distributions
Volume 20, Issue 8, pages 908–917, August 2014
How to Cite
Rader, R., Bartomeus, I., Tylianakis, J. M., Laliberté, E. (2014), The winners and losers of land use intensification: pollinator community disassembly is non-random and alters functional diversity. Diversity and Distributions, 20: 908–917. doi: 10.1111/ddi.12221
- Issue published online: 9 JUL 2014
- Article first published online: 22 MAY 2014
- Rutherford Discovery Fellowship
- Australian Research Council
- DECRA. Grant Number: DE120100352
- ecosystem function;
- functional richness;
- functional traits;
- land use change;
Pollination services are at risk from land use change and intensification, but responses of individual pollinator species are often variable, making it difficult to detect and understand community-level impacts on pollination. We investigated changes in community composition and functional diversity of insect pollinator communities under land use change in a highly modified landscape.
Canterbury region, South Island, New Zealand.
We trapped insect pollinators every month for 1 year at 24 sites across four land use types of increasing intensity in New Zealand: gardens with native vegetation, blackcurrant orchards, dairy farms, and rotational cropping farms. We investigated changes in pollinator species and functional richness and differences in species and functional composition.
Under increasing land use intensity, both species and functional richness declined markedly. Changes in functional richness, however, were overall not significantly different than expected based on the observed declines in species richness. Nevertheless, there was a significant trend towards greater than expected functional richness within less-intensive land use types and lower than expected functional richness within intensive land use types. The order of species loss under increasing land use intensity was non-random, as pollinators with a narrow diet breadth, large body size, solitary behaviour and a preference for non-floral larval food resources were lost first.
Our study shows that pollinator species bearing particular trait attributes are susceptible to differences in land use. Our study suggests that pollination services may be more vulnerable to environmental changes and disturbances in more intensive land use types as a result of lower pollinator functional richness.