Marjolein Visser

Marjolein Visser
Université Libre de Bruxelles | ULB · Interfaculty School of Bioengineers

Professor

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83
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Publications

Publications (83)
Article
Full text available here (read-only): https://rdcu.be/cF7Gj Despite the growing concerns over the damages and unsustainability of conventional agriculture, arable farmers struggle to convert to organic cropping practices. In wheat farming, the lack of cultivars adapted to organic cropping has prompted a search for alternatives to better cope with...
Chapter
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This chapter shares insights from a reflexive research process about ideal visions, aspirations,choices and compromises made along the way in the establishment of the Brussels-based Cycle Farm. We show why and how three of the chapter’s authors, together with two urban farmers, collectively explored these issues, and what can be learned in terms of...
Article
Many ecological restoration projects involving wild dryland grasses work with bulk‐harvested seed, yet bulking may lead one to overlook and lose genetic variation that turns out to be crucial for restoration success, including specific dormancy breakdown requirements (conditional dormancy) and genetic variation in these. This paper reports on the g...
Chapter
Cet ouvrage contribue à la réflexion de deux enjeux d'actualité que sont la transition des systèmes alimentaires justes et durables et la recherche action participative. Il témoigne d'expériences de recherche récentes et concrètes qui apportent une meilleure compréhension de ces enjeux en Région bruxelloise, tout en offrant un regard inspirant pour...
Article
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Background and aims – With the perspective to reseed degraded drylands, grass seeds are often stocked for several years. This common practice overlooks conditional dormancy and the necessity to preserve it. This paper reports on the germination ecology of Stipa lagascae Roem. & Schult., which is a circum-Mediterranean winter-growing bunch grass of...
Article
This article discusses the economic dimensions of agroecological farming systems in Europe. It firstly theoretically elaborates the reasons why, and under what conditions, agroecological farming systems have the potential to produce higher incomes than farms that follow the conventional logic. This theoretical exposition is then followed by a prese...
Article
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Ces dernières années ont été caractérisées par la (ré)émergence d’une diversité de formes d’agriculture urbaine aux multiples fonctions, qui impliquent, notamment, le développement d’activités professionnelles. C’est dans ce cadre que, de 2015 à 2018, deux projets de recherche-action participative ont été mis en place à Bruxelles. Leur objectif est...
Article
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This paper draws on an ongoing experience of supporting participatory action research for sustainable food systems in Brussels. To share our insights and identify learnings from this experience, we bring together discussions in the literature on the development of an urban food systems perspective on agroecology, the institutionalization of agroeco...
Article
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We are part of an action research project that aims to enrich urban agriculture with agroecology and of a cross-cutting project that seeks to encourage reflexivity and foster mutual learning among all project participants. From that position, we explore the role of urban agroecology in food system research. In "Conceptualizing Urban Agroecology"....
Article
Possible operational levers to improve agricultural innovation systems include innovation platforms to support interaction among various stakeholders. Seed networks are one such example. Li Mestère, the irst network of this type in Wallonia, has brought together a diverse range of stakeholders to manage the crop diversity of cereals. It facilitates...
Chapter
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In order to understand the dynamics of the urbanization and suburbanization processes and hence to quantify the anthropogenic effects of the rapid growth of tropical cities, it is crucial to find and apply valuable methods. In this contribution, the transferability of the Rüdisser et al. (2012) “Distance to Nature” hemeroby assessment method to the...
Article
ABSTRACT The shift to industrial agriculture in Europe brought along a range of environmental and social externalities. This led policy makers, researchers and civil servants to consider and explore the potential of diversified farming systems (DFS) to address current problems in agriculture. However, because of multiple obstacles adoption of these...
Article
Agroforestry (AF) is promoted as an environmentally sound farming practice to address the pressing challenges of meeting a rising global demand for agricultural commodities while conserving biodiversity. Although AF played an important role in European farming in the past, reintroducing the planting of trees in fields is a radical innovation in the...
Thesis
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Small-scale farmers comprise the majority of farmers in the world. In the Peruvian Andes, small-scale farmers are guardians of invaluable traditional knowledge and agrobiodiversity but they commonly live in poverty and are frequently marginalized. Countless agricultural development projects have been implemented to promote the economic development...
Article
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Several ethnopedological studies highlight the plurality of soil knowledge and the complexity of soil knowledge systems. These knowledge systems are specific to social groups or communities and the dialogue between them is not easy. Local soil knowledge is often misrepresented and reduced when correspondences with soil sciences categories are estab...
Article
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Background In Thailand, pig production intensified significantly during the last decade, with many economic, epidemiological and environmental implications. Strategies toward more sustainable future developments are currently investigated, and these could be informed by a detailed assessment of the main trends in the pig sector, and on how differen...
Conference Paper
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We address in this paper opportunities of Q Methodology for empirical agricultural innovation studies. In the systems perspective on innovation, multi-actor innovation networks are seen as a key strategy to successful innovation. Given the several types of actors involved, the scientific and policy literature points at the need for 'innovation brok...
Article
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Description of the subject. Several ethnobotanical studies have demonstrated links between traditional medicine practices and the ethnicity and geographical location of healers, while many others have concluded the opposite. This study deals with the typology of traditional healers in the mountain region of Kahuzi-Biega. Objectives. The goal is to...
Article
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En ethnobotanique, des aspects comme l’influence de l’accessibilité d’une plante sur sa fréquence d’usage, le consensus entre les tradipraticiens autour des rela- tions maladie-plante ainsi que le degré de fidélité d’une plante à une catégorie de maladies sont essentiels pour évaluer une tradition médicinale ; mais ils sont d’une interprétation dif...
Article
Copper smelting has created large surfaces of bare soil contaminated by trace metals (TMs: e.g., total Cu: 42,500 mg kg−1 in bare soil vs. 220 mg kg−1 in remote forest) in the Lubumbashi suburbs of the ‘Cité Gécamines/Penga Penga’ (Katanga, D.R. Congo). Human exposure to trace metals at the site has become a primary environmental concern. This stud...
Conference Paper
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Anthropogenic disturbances impact the whole biosphere, at least indirectly, and are of major concern in various disciplines and policies. To tackle it, most studies, specific to their thematic, create their own reference framework without connection with related purposes in other disciplines. This results in a plethora of terms and concepts that in...
Article
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The identification of a universal law that can predict the spatiotemporal structure of any entity at any scale has long been pursued. Thermodynamics have targeted this goal, and the concept of entropy has been widely applied for various disciplines and purposes, including landscape ecology. Within this discipline, however, the uses of the entropy c...
Article
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For ethnobotanists, aspects such as the influence of a plant's accessibility on its frequency of use, consensus among traditional therapists over the relationships between plants and diseases and the degree of fidelity to a plant for a given category of ailments are essential to assess a medicinal tradition, but difficult to interpret. We explored...
Article
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Tropical termites are of critical importance for ecosystem functioning and ecosystem services in woodland and savannah areas. Termite mounds can also be used as fertilizer and biological indicators of anthropogenic disturbance linked to agriculture or charcoal production. Remote sensing may help to identify and characterize termite mound density an...
Article
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In Lubumbashi (Katangan copperbelt, DR Congo), atmospheric fallout from a copper smelter has contaminated soils with several trace metals (TMs) (e.g. up to 50000 mg kg-1 Cu). For large areas downwind of the smelter, the vegetation has been destroyed and replaced by bare soils (Munyemba 2010, Mpundu 2010). These areas are subject to active erosion b...
Article
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In the south-eastern part of the Katanga Province (Democratic Republic of the Congo), high concentrations of copper and cobalt are found in the soils of the well-known “Copper Belt”. Due to the dominant south-eastern winds, the metallurgic industry in Lubumbashi has been the source of spatially concentrated atmospheric deposits of nonferrous metal...
Article
La connaissance des changements qui s'opèrent dans la couverture pédologique au niveau de la lisière forestière est nécessaire pour une meilleure compréhension de l'impact de la fragmentation des forêts sur les propriétés des sols. L'objectif de cette étude est d'évaluer les effets de la fragmentation des forêts causés par l'agriculture itinérante...
Article
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Nous avons évalué l'impact anthropique sur la richesse, la diversité, l'abondance et la densité relative des Rongeurs dans quatre habitats de la Réserve de Masako au nord-est de la République Démocratique du Congo. Une forêt primaire à Gilbertiodendron dewevrei et trois habitats d'origine anthropique (forêt secondaire, jachère et zone de contact ja...
Article
Anthropogenic effects on rodent richness, diversity, abundance, and relative density were studied in 4 habitats of the Masako Reserve, situated in the northeastern part of the Democratic Republic of the Congo. A primary forest dominated by Gilbertiodendron dewevrei as well as 3 anthropogenic habitats (secondary forest, fallow land, and the edge zon...
Article
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In North African dryland research, few recognize that phosphorus (P) is the main soil nutrient limiting plant growth for legumes, in particular. P-fertilisation of legume reseedings could boost biological N-fixation and N-yield through enhanced biomass production, which, in turn, can benefit the re-establishment of resourceresponsive perennial gras...
Article
Anthropogenic effects on rodent richness, diversity, abundance, and relative density were studied in 4 habitats of the Masako Reserve, situated in the northeastern part of the Democratic Republic of the Congo. A primary forest dominated by Gilbertiodendron dewevrei as well as 3 anthropogenic habitats (secondary forest, fallow land, and the edge zon...
Article
Full-text available
Deforestation remains a real concern for environmental managers. The main causes cited in a wide range of studies are: (i) agricultural practices, especially shifting cultivation, (ii) timber exploitation and (iii) charcoal and firewood production. All of these causes are exacerbated by population growth. This rather pessimistic view of the effect...
Chapter
Through a series of five case studies, possible drivers and consequences of deforestation are discussed. Three studies focus on the Katanga Province (Democratic Republic of the Congo). The potential threat of mining activities for the forest ecosystems in the province is assessed in a first study; these mining concessions could cover up to 75% of t...
Article
A field trial was conducted to evaluate the effects of rice straw (Oryza sativa L) and two spontaneous plant (Pueraria phaseloïdes and Chromolaena odorata) residues combined or not with mineral fertilizers on a lowland rice cultivar growth and yield parameters. C. odorata and P. phaseloides residues applied alone or with mineral fertilizers allowed...
Article
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This study evaluates the feasibility of using the grass species Rendlia altera, Monocymbium ceresiiforme, Cynodon dactylon, and amendments (compost and lime) for the phytostabilisation of soils contaminated by Cu in the province of Katanga (Democratic Republic of Congo). Species were grown on control and Cu-contaminated plots (artificially contamin...
Article
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Abstract When grass species are used to reseed depleted drylands, grazing is often prescribed during the establishment phase. Total protection from grazing often leads to the presence of persistent weed species and is hard to accept by land users keen to graze reseeded land as soon as possible. The particular case of reseeding arid Mediterranean ce...
Article
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Située à proximité de Kinshasa, la province du Bas-Congo (R.D. Congo) est l\'une des principales pourvoyeuses en produits vivriers de cette ville. Par conséquent, l\'augmentation de la pression sur les ressources naturelles s\'accentue. L\'analyse diachronique du paysage peut servir à montrer l\'effet des actions anthropiques sur l\'occupation du s...
Article
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Native seed needs to be sourced locally yet contain ample genetic variation. A blueprint is developed for assembling and assessing native plant material at one eco-geographical site prior to seed multiplication for restoring degraded drylands of North Africa. To satisfy the ‘local yet ample’ criterion, the feasibility of selecting a limited number...
Chapter
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Forest fragmentation has a paramount impact on landscape pattern and has therefore been a key focus of landscape ecology. Trends and causes of deforestation are analysed for the Democratic Republic of the Congo, Rwanda and Burundi, and are put in a regional, continental and global perspective. In order to investigate the role of shifting cultivatio...
Article
Full-text available
Native seed needs to be sourced locally yet contain ample genetic variation. A blueprint is developed for assembling and assessing native plant material at one eco-geographical site prior to seed multiplication for restoring degraded drylands of North Africa. To satisfy the ‘local yet ample’ criterion, the feasibility of selecting a limited number...
Article
Full-text available
Managing marginal farmland with high nature value can be a strong source of conflict between farmers and conservationists. In the West of Ireland, marginal farmland is at the heart of Special Areas of Conservation (SACs) designation and turloughs are an example of marginal grazing land with the status of EU Natura 2000 Priority Habitat. A turlough...
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Turloughs are seasonal ground-water-dependent wetlands that occur in the karst landscape of western Ireland. Various typologies based on between-site variation have been applied to turloughs. However valid in understanding turlough functioning, these typologies are difficult to relate to one another, tend to overlook within-site variation, and do n...
Article
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Two methods were used to sample aquatic macroinvertebrates in three turloughs. Turloughs are systems that flood periodically from groundwater, in response to local rainfall patterns and contain rare aquatic species and assemblages. The first method used a standard pond net that was swept through the water column, while the second involved. xing a r...
Article
Full-text available
Two methods were used to sample aquatic macroinvertebrates in three turloughs. Turloughs are systems that flood periodically from groundwater, in response to local rainfall patterns and contain rare aquatic species and assemblages. The first method used a standard pond net that was swept through the water column, while the second involved fixing a...
Article
Full-text available
Apart from a decrease in total perennial plant cover, degradation of North-African arid lands is not easy to qualify. Yet, simple and comprehensive yardsticks are necessary to assess degradation. We assigned components of competitive ability (C), stress tolerance (S) and ruderality (R) to 15 common perennials of Presaharian Tunisia. We used for tha...