Troell is primarily based at the Beijer Institute for Ecological Economics. He is also affiliated with the SwedBio programme at the Stockholm Resilience Centre.
His practical fieldwork has mainly been conducted in developing countries (both tropical and temperate) and involved coastal systems as well as freshwater systems. He is currently doing work in India and Cambodia, where he studies how aquacultures allocation of low valued fish resources affect poor peoples ability to access cheep fish. In India he studies coastal fishery resources and coastal communities, and in Cambodia the Mekong fishery and rural inland communities (Sida Project).
A further area of interest is developing integrated cultivation techniques. This work started with coastal open-water aquaculture in Chile, and at present he is involved in works on land-based abalone farms in South Africa (Sida Project). The systems he tries to develop build on using seaweeds as biofilters, with the ultimate aim to increase environmental and economic performance.
A key question is what role these systems can play in future development of aquaculture, i.e. considering the challenges we face with limited resources and degrading environments. Also within this concept he has a minor part in a EU project where peri-urban mangroves are evaluated out from their biofiltering capacity. This work has besides studying nutrient dynamics also a component where socio-economic benefits are evaluated (including estimation of ecosystem goods and services generated from the mangroves).
Troell is also more generally working with ecological and socio- economic evaluation of ecosystem goods and services generated from tropical and temperate coastal systems. The latest work involved identification of goods and services from some Swedish key coastal habitats, and how to value these (SEEPA).
Since 1991 Troell has been teaching and acting as course leader for marine and freshwater ecology courses. He has regular and occasional teaching assignments on various courses (University level teaching; SU, UmeåUniv., SLU, KTH, Södertörn).
He is a course leader for PhD certificate course (Ecology and economic management, 4 cr), given by The Beijer Institute and has taught ecology in a Sida financed teaching and training programme on environment and development issues for university teachers in economics in developing countries.
Research news | 2020-08-24
Increasing gap between current targets and future projections puts China at a crossroads. What options do they have and how will that affect global seafood supply?
Research news | 2020-05-01
Like pandemics, resistance to antibiotics and pesticides knows no boundaries. Unsustainable practices in food and health have been intensifying in an arms race with resistant bacteria, insects and plants
Research news | 2020-03-09
The world is enjoying a richer diet but most countries increasingly depend on food imports. That should worry many of them
Research news | 2020-02-13
New assessment aims to fill critical gaps in understanding the growing role aquatic foods play in the global food system
2020 - Journal / article
Rapidly increasing international food trade has drastically altered the global food system over the past decades. Using national scale indicators, we assess two of the resilience principles that directly reflect the effects of global trade on food systems – namely, maintaining diversity and redundancy, and managing connectivity. We perform our analysis for four nutritional components: dietary energy, proteins, fat, and quanti...
2020 - Journal / article
Development of new biocides has dominated human responses to evolution of antibiotic and pesticide resistance. Increasing and uniform biocide use, the spread of resistance genes, and the lack of new classes of compounds indicate the importance of navigating toward more sustainable coevolutionary dynamics between human culture and species that evolve resistance. To inform this challenge, we introduce the concept of coevolution...
2019 - Journal / article
The dominant sustainable seafood narrative is one where developed world markets catalyze practice improvements by fisheries and aquaculture producers that enhance ocean health. The narrow framing of seafood sustainability in terms of aquaculture or fisheries management and ocean health has contributed to the omission of these important food production systems from the discussion on global food system sustainability. This omiss...
2019 - Journal / article
Indonesia is the world's second largest producer and third largest consumer of seafood. Fish is thus essential to the nation, both financially and nutritionally. Overfishing and the effects of climate change will, however, limit future capture fisheries landings, so any increases in future seafood production will need to come from aquaculture. Aquaculture's ecological effects are dependent upon the choice of species, managemen...