This essay explores the changing landscape of food sovereignty politics in the shadow of the so-called ‘land grab’. While the food sovereignty movement emerged within a global agrarian crisis conjuncture triggered by northern dumping of foodstuffs, institutionalized in WTO trade rules, the twenty-first-century food, energy and financial crises intensify this crisis for the world’s rural poor (inflating prices of staple foods and agri-inputs) deepening the process of dispossession.

We describe a bio-economic model for Nassella neesiana (Chilean needle grass) that estimates the net benefit of a containment programme for the weed in Canterbury as the difference between the cost of containment and the costs incurred over time should the weed spread within sheep and beef pastoral systems. Logistic spread is assumed with the maximum area that could be invaded (772,080 ha) determined by constraining a climate niche model for the weed to susceptible farm system types within productive land use capability classes.

Human activities influence the biodiversity of Mediterranean ecosystems and are involved in the transformation of natural habitats into farmland. We surveyed birds using the point count method on 288 plots at a 50-m radius in three altitudinal landscapes with different rural character in spring and autumn. The results showed that bird species richness in the study area was high (74 species). High total species richness was found in the upland rural landscape characterized by mixed land use and high landscape diversity.