Ecologies

This paper shares the strategies of The Ash Project (2016-2019), a public art project through which we worked to commission a memorial sculpture and a series of walks, talks, workshops and exhibitions to create closer relationships between ash trees and local publics in South East England. The paper tells the story of ash dieback a deadly fungus that attacks the trees vascular system causing the death of ash trees across Europe.  Exploring ash trees and their place in European myth and identity, the paper situates the concerns of the ash within broader thinking about capitalism's intensifying impact on nature. The paper shares the way in which trade in plants creates increasing risks to plant health and the chain of species and landscape loss that follows. The writing moves between the situated knowledges that arose during the project to investigating the place of ash in the colonised landscapes of Australia, to think ­­about the way in which plants might perform complex relationships to a collective sense of national and colonial identity through an exploration of ash migrations via acclimatisation societies in Australia and New Zealand. Finally the essay shares reflections on grief, asking how we might perform memorial acts of walking and remembering as an approach to ethical relationality to place that acknowledges our complex shared histories in multi-species entanglements.

Biological invasions and climate pose two of the most important challenges facing global biodiversity. Certainly, climate change may intensify the impacts of invasion by allowing invasive plants to increase in abundance and further expand their ranges. For example, most aquatic alien plants in temperate climate are of tropical and subtropical origins and the northern limits of their ranges are generally determined by minimum winter temperatures, and they will probably expand their distributions northwards if climate warms. The distribution of five invasive aquatic plants in freshwater systems across continents were investigated. Their global distributions in the current climate were modeled using a recently developed ensemble species distribution model approach, specifically designed to account for dispersal constraints on the distributions of range-expanding species. It was found that the species appear capable of substantial range expansion, and that low winter temperature is the ...

ABSTRACT The main aim of that paper is to rethinking the connections between complexity and management provoking questions among managers and entrepreneurs, moreover between specialists about consolidated practices of control, governance and predictability. Which compatibility of those practices with emergent complexity of the world. A world where knowledge assume a central role to generate value in a different manner respect to /fordism/ and post-fordism. How to facing permanent innovation and change? Which form of new firm able to match a new global environment? Ecologies of value is a first answer to those great questions, not the sole but probably a good start in particular with an application to local production system and relationship between economic space and complexity about Italian district.

We investigated the ecological requirements in the emergence phase of two congeneric species of Aeshnidae, Aeshna grandis (Linnaeus 1758) and A. juncea (Linnaeus 1758), occurring in syntopy at the southernmost limit of their range. We sampled the exuviae of the two species at the peak of their emergence in three lakes in NW Italy. In each lake we defined 30 to 50 sampling plots along the lake borders where we checked for the presence of exuviae and collected data on the microhabitat composition. By modeling the response of the exuviae presence and abundance against the environmental parameters, we could highlight a partial differentiation in the ecological requirements of the two species at emergence. In particular, A. grandis is more influenced by the structure of the aquatic vegetation than A. juncea and the niche space occupied by A. grandis is wider, almost totally encompassing the one of A. juncea. We argue that A. grandis exploits microhabitats rich in aquatic plants to avoid ...