Announcing new project on forest landscapes in Vietnam (with PhD post)

April 25, 2017

Forest in Vietnam can mean many things. There are the dense, dipterocarp rainforests that have divulged mammal species previously unknown to science, like the saola. There are also the vast plantations of exotic acacias growing wood for industry, as I detailed in a previous blog entry. And these forests have changed rapidly in the past few decades in step with the country’s economy and politics. The country is often seen to have undergone a “forest transition”, whereby a previous history of deforestation transitions to a new phase characterised by forest stability and indeed regrowth (albeit largely with exotic plantations).  In a new research-for-development project (see PhD job ad here), we intend to investigate the exact nature of the forest transition and its feedback into sustainable development for the heavily peopled rural landscapes of Vietnam.

r4d photo - 4

Acacia mangium, forest plantations, and natural rainforest in A Luoi district, Vietnam

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Invasive species: interdisciplinarity, ecosystem (dis)services, and aesthetics

February 21, 2017

Announcing a series of new publications on “invasive species”, all from the Socio-ecology of Acacia project in which I participated (funded by SESYNC and two German research institutes). Here’s why they are interesting: Read the rest of this entry »


Arbres voyageurs et plantes invasives dans les pays du Sud

October 17, 2016

FGSE Unil ouverture des cours 2016-2017 Last month I gave the ceremonial first lecture of the academic year for our Faculty.  The video is now online (see below).  The presentation dips into a number of research projects I’ve contributed to in recent years in order to make a number of observations about the relationship between plants and people, notably with iconic ‘natural’ plants and problematic ‘invasive’ weeds.  These observations include: Read the rest of this entry »


A political ecology of weeds

October 1, 2015

How do plants that move and spread across landscapes become branded as weeds and thereby objects of contention and control? In a chapter recently published in the International Handbook of Political Ecology, Priya Rangan and I outline a political ecology approach that builds on a Lefebvrian understanding of the production of space, identifying three scalar moments that make plants into ‘weeds’ in different spatial contexts and landscapes.

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Thorny landscapes

September 26, 2015

Just rediscovered a scribbled note from a few days in the “brousse” of New Caledonia late last year.  We visited landscapes pounded by grazing, from a 600 ha cattle station turned into a horse farm and gîte in the more wild, mountainous nickel mining country around Thio, to the yellow-grass cattle and goat ranches in the semi-arid rain shadow country of Boulouparis.  In these places, I found myself in the company of a variety of  familiar thorny and weedy plants like mimosa bush, lantana, and coffee bush.  Different bouquets of the same suite of plants decorate pastoral landscapes I’ve encountered in Fiji, Vanuatu, Madagascar, Australia, Reunion… and probably many more places too.

The thorny bush Acacia (Vachellia) farnesiana on a cattle ranch near Boulouparis, New Caledonia

The thorny bush Acacia (Vachellia) farnesiana on a cattle ranch near Boulouparis, New Caledonia

Seeing these ‘old friends’ reminded me of a simple message about biological invasions that does not get enough consideration:  it’s not the plant’ fault.  The plants themselves – or the plant species – do not really deserve the lables as invasives and weeds.  It is us humans that need to be branded: they are there because of us, because of our land uses and Read the rest of this entry »


Peatland deforestation for acacia in Indonesia

September 27, 2014

Oil palm gets all the attention, but what about acacia?  Oil palm has become synonymous with deforestation in Indonesia and resulting losses of orang-utan habitat, increased carbon emissions, and unhealthy smoke haze.  But equally large areas of peatland are being converted to pulp and paper plantations of tropical salwood wattles like Acacia crassicarpa and A. magnum, trees that now cover many millions of hectares in South East Asia.  In Riau province, Sumatra, the two big pulp mills (operated by Asia Pulp and Paper [APP] and Asia Pacific Resources International Ltd [APRIL]) have around 75 and 45 per cent (respectively) of their pulp plantations located on peatland. The ways in which such forestry concessions have been granted and implemented have inspired dramatic protests: 28 residents of the Meranti Islands in Riau Province stitched their lips shut while demonstrating in front of government buildings in Jakarta (Jakarta PostTransparency Int.). Read the rest of this entry »


Reflections on invasion biology

September 9, 2014

Invasion biology has been a remarkably active branch of the life sciences in the past two decades.  My itinerary first crossed this field when I noticed, at the time of my move to Melbourne, that the ‘precious’ mimosas (acacias, wattles) of the Madagascar highlands were called ‘green cancer’ in South Africa, and in both cases were introduced from Australia.  It was quite surprising to discover that this shrubby tree, so appreciated by Malagasy farmers (as a resource) and environmental managers (as ‘regreening’ barren lands), was seen so negatively across the Mozambique Channel.  This observation led to a research program that (1) opened a window for me to learn about and consider the field of invasion biology, and (2), serendipitously, to collaboration with ecologist Jacques Tassin at the French research institute Cirad.  I comment on some of the recent fruits of both in this blog.

The South African approach to alien plants.  Cartoon from environmental education material collected in 2006 (thanks to Rémy Kinna).
The South African approach to alien plants. Cartoon from environmental education material collected in 2006 (thanks to Rémy Kinna).

In a just-published viewpoint in the journal Land Use Policy [free official pdf until Oct. 6 pdflink], Jacques and I argue that Read the rest of this entry »