Invasive cordgrass (Spartina spp.) in south‐eastern Australia induces island formation,salt marsh development,and carbon storage

Invasive vegetation species can lead to major changes in the geomorphology of coastal systems. Within temperate estuaries in the southern hemisphere, especially Australia and New Zealand, the cordgrass Spartina spp. has become established. These species are highly invasive, and their prolific growth leads to the development of supratidal environments in formerly intertidal and subtidal environments. Here, we quantified the impact of Spartina invasion on the geomorphology and sequestration capacity of carbon in the sediments of Anderson Inlet, Victoria, Australia. Spartina was first introduced to the area in the 1930s to aid in land reclamation and control coastal erosion associated with coastal development. We found that Spartina now dominates the intertidal areas of the Inlet and promotes accretion (18 mm/year) causing the formation of over 108 ha of supratidal islands over the past 100 years. These newly formed islands are calculated to potentially contain over 5.5 million tonnes of CO₂ equivalent carbon. Future management of the inlet and other Spartina‐dominated environments within Australian presents a dilemma for resource managers; on the one hand, Spartina is highly invasive and can outcompete native tidal marshes, thereby warranting its eradication, but on the other hand it is likely more resilient to rising sea levels and has the potential for carbon sequestration. Whether or not the potential advantages outweigh the significant habitat change that is anticipated, any management strategies will likely require additional research into costs and benefits of all ecosystem services provided by Spartina including in relation to nutrient cycling, shoreline stabilisation, and biodiversity as well as in response to the longevity of carbon found within the sediments.     

Urban commons are more‐than‐property

Urban commons are characterised in the literature as collectively shared property in the city shaped by a context of scarce resources, population density, and the interaction of strangers. In the broader commons literature, commons appears as a verb, a noun, and a process made by practices of commoning—albeit still with a focus on property. In this paper, I argue that an understanding of urban commons as more‐than‐property is needed to recognise how present but elusive urban commons are. I use examples from interviews and observations conducted at a Women's Library to discuss how the access, use, benefit, care, responsibility, and ownership of this urban commons bring it into being through particular practices of commoning. By questioning current ways of defining urban commons, urban scholars gain a grounded understanding of the role of property, and other practices, in maintaining an urban commons over time.     

W(h)ither anthropology? Opening up or closing down (Respond to this article at http://www.therai.org.uk/at/debate)

This editorial provides a brief overview of the place of anthropology in the work of International Financial Institutions (IFI) and argues for a more central role for the subject in building a more sustainable and equitable future. Anthropologists have always wanted to open things up, rather than close them down ‐ to explore ambiguities and possibilities rather than impose externally conceived solutions. The editorial argues for the development of a science of morality based on anthropological perspectives that reach back to enlightenment thinkers and that reconfigure premises developed and informed by a linear perspective on the meaning of development. This is particularly important at this time because of the recent failures of financial institutions and a growing recognition that the millennium development goals are unattainable in the terms in which they have been conceived.