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3R Kenya (Robust, Reliable and Resilient) - From aid to trade project, annual report 2019
No full textAssessing the resilience and sustainability of a hazelnut farming system in central Italy with a participatory approach
Full text linkEuropean agriculture is facing increasing economic, environmental, institutional, and social challenges, from changes in demographic trends to the effects of climate change. In this context of high instability, the agricultural sector in Europe needs to improve its resilience and sustainability. Local assessments and strategies at the farming system level are needed, and this paper focuses on a hazelnut farming system in central Italy. For the assessment, a participatory approach was used, based on a stakeholder workshop. The results depicted a system with a strong economic and productive role, but which seems to overlook natural resources. This would suggest a relatively low environmental sustainability of the system, although the actual environmental impact of hazelnut farming is controversial. In terms of resilience, we assessed it by looking at the perceived level of three capacities: robustness, adaptability, and transformability. The results portrayed a highly robust system, but with relatively lower adaptability and transformability. Taking the farming system as the focal level was important to consider the role of different actors. While mechanisation has played a central role in enhancing past and present system resilience, future improvements can be achieved through collective strategies and system diversi?cation, and by strengthening the local hazelnut value chain.</p
Plant volatiles induced by herbivore eggs prime defences and mediate shifts in the reproductive strategy of receiving plants
No full textPlants can detect cues associated with the risk of future herbivory and modify defence phenotypes accordingly; however, our current understanding is limited both with respect to the range of early warning cues to which plants respond and the nature of the responses. Here we report that exposure to volatile emissions from plant tissues infested with herbivore eggs promotes stronger defence responses to subsequent herbivory in two Brassica species. Furthermore, exposure to these volatile cues elicited an apparent shift from growth to reproduction in Brassica nigra, with exposed plants exhibiting increased flower and seed production, but reduced leaf production, relative to unexposed controls. Our results thus document plant defence priming in response to a novel environmental cue, oviposition-induced plant volatiles, while also showing that plant responses to early warning cues can include changes in both defence and life-history traits.</p
Inferring an animal's environment through biologging: quantifying the environmental contribution to animal movement
No full textGPS and accelerometer sensor data from cows used in a data-driven analytic framework to quantify the environmental contribution to animal movemen
Alien flora across European coastal dunes
No full textQuestions: The spread of alien plant species is one of the main threats to the biodiversity of different natural habitats, and coastal dune habitats are among the most affected. There is a considerable local and regional variation in the level of alien plant invasion on coastal dunes. We asked what are the patterns of invasion across European coastal dunes and how they depend on habitat types and coastal regions. Location: Atlantic, Baltic, Black Sea and Mediterranean coasts of Europe. Methods: We used vegetation-plot records from shifting dunes and stable dune grasslands extracted from the European Vegetation Archive (EVA). We quantified richness, frequency and distribution of alien plant (neophyte) species across dune habitats and coastal regions. We also explored the donor habitats and invasion trajectories of these species. Results: In the flora of European coastal dunes, 7% of species were neophytes, for two-thirds originating from outside of Europe and mostly naturalised and ruderal. Shifting and stable dunes were similar in neophyte species composition, but there were more individual occurrences of neophytes in shifting dunes. The neophyte flora composition differed considerably between the Atlantic, Baltic, Black Sea and Mediterranean regions. The highest number of neophyte species was observed on the Atlantic dunes, while the highest number of neophyte occurrences was on the Black Sea dunes. Most of the neophytes originated from North America and the Mediterranean-Turanian region. Erigeron canadensis, Xanthium orientale, Oenothera biennis and Oenothera oakesiana were the most common neophytes. Conclusions: We provided a comprehensive assessment of alien plant invasions in the coastal dunes across Europe and highlighted that coastal dunes should be in the focus of European invasion management strategies.</p
Arabidopsis in the wild—the effect of seasons on seed performance
Full text linkClimate changes play a central role in the adaptive life histories of organisms all over the world. In higher plants, these changes may impact seed performance, both during seed development and after dispersal. To examine the plasticity of seed performance as a response to environmental fluctuations, eight genotypes known to be affected in seed dormancy and longevity were grown in the field in all seasons of two years. Soil and air temperature, day length, precipitation, and sun hours per day were monitored. We show that seed performance depends on the season. Seeds produced by plants grown in the summer, when the days began to shorten and the temperature started to decrease, were smaller with deeper dormancy and lower seed longevity compared to the other seasons when seeds were matured at higher temperature over longer days. The performance of seeds developed in the different seasons was compared to seeds produced in controlled conditions. This revealed that plants grown in a controlled environment produced larger seeds with lower dormancy than those grown in the field. All together the results show that the effect of the environment largely overrules the genetic effects, and especially, differences in seed dormancy caused by the different seasons were larger than the differences between the genotypes.</p
Physiological and morphological characterisation of Limonium species in their natural habitats : Insights into their abiotic stress responses
No full textBackground and aims: Morphological and biochemical traits of four halophytes of the genus Limonium were analysed in plants sampled from salt marshes in SE Spain. This work aimed to explore the mechanism(s) behind the adaptation of these species to stressful habitats, with particular emphasis on responses to drought. Methods: Plants of each species together with soil samples were collected in summer, which is the most stressful season in the Mediterranean. Soil parameters and plant morphological traits were determined, and the levels of several biochemical stress markers in plants were measured using spectrophotometric assays. A multivariate analysis was performed to correlate soil and plant data. Results: Morphological characteristics regarding the underground system topology and several biochemical traits (higher foliar Ca2+, sucrose and glucose, and lower proline, glycine-betaine and fructose) clearly separate L. santapolense individuals from plants of the other three species. Conclusions: Drought tolerance of L. santapolense in the field is mostly dependent on morphological adaptations: when growing in an arid location, plants of this species develop long taproots that can extract water from the deep, moist layers of the soil.</p
Social-psychological factors in food consumption of rural residents : The role of perceived need and habit within the theory of planned behavior
Full text linkTo address the problem of malnutrition in poor rural areas of China, this study aims to examine the effects of social-psychological factors in food consumption of rural residents in poor counties of Southwest China. In addition, it investigates the role of perceived need and habit within the theory of planned behavior (TPB) in predicting food consumption. A survey with random sampling was conducted on rural residents (n = 424), and the theoretical frameworks of both the standard and extended TPB were applied for comparison purposes. Structural equation modeling was applied to test the relationships among constructs. Consumption of five food items was studied, respectively: meat, eggs, dairy, fish, and fruits. Results showed that incorporation of perceived need and habit substantially increased the explanatory power of the TPB, but these factors only had significant direct effects on intention rather than behavior. Perceived need and habit are stronger predictors of intention than any other TPB construct for consumption of all food items except for meat. We found indirect effects of the constructs in the extended TPB model on consumption to be different across food items. Practical implications to improve consumption of different food items were proposed accordingly.</p
Farmers’ upheaval, climate crisis and populism
Full text linkThis article aims to unravel underlying reasons for the enigmatic outburst of farmers’ fury that swept large parts of Europe in the autumn of 2019. It does so by focussing on the Netherlands where the upheaval was particularly striking. Farmers’ resentment against ‘agribashing’ was a common theme in the many protests. This refers to, and simultaneously delegitimizes, all critiques of the current organization of farming and the unequal international patterns in which it is embedded. The article argues that the currently emerging farmers’ movement basically represents a regressive populism. It ignores the many-sided crisis of agriculture (related to ever increasing use of nitrogen, pesticides and energy that contribute to the climate crisis and loss of biodiversity) and the politico-economic processes and unequal power relations underlying this. Although this movement creates many smoke screens, it is essentially fighting for the reproduction of the same order that makes a substantial contribution to these multiple crises. As international comparison shows, this new form of right-wing, rural populism reflects the degree to which entrepreneurial agriculture has internalized the logic of capital: it needs ongoing expansion, both for material and symbolic reasons. Peasant agriculture could provide a much needed counter-image to this. In practice, though, it is highly segmented and dispersed and is in urgent need of a new unifying device.</p
Designing wildlife-inclusive cities that support human-animal co-existence
No full textIn an urbanizing world there is an increasing priority for making cities nature-inclusive environments. Cities offer places for human-wildlife experiences, and thus for broad societal support of biodiversity conservation. Cities also depend on ecosystem services provided by biodiversity to remain healthy, liveable places. Although biodiversity is frequently addressed in urban green infrastructure plans, it often is not an integral topic in city planning, urban design and housing development. As a result, wildlife-rich urban green is often lacking in those parts of the cities where people live and work. Here, we introduce the concept of ‘wildlife-inclusive urban design’ for the built-up area of cities that integrates animal needs into the urban planning and design process. To identify key features that determine the success of wildlife-inclusive urban design, we evaluated lessons learnt from existing best practices. These were collected during an international workshop with architects, landscape practitioners, ecological consultants, conservationists and urban ecologists. We propose that features of successful wildlife-inclusive urban design projects are: 1) interdisciplinary design teams that involve ecologists early on, 2) consideration of the entire life-cycle of target species, 3) post-occupancy monitoring and evaluation with feedback to communicate best practices, and 4) stakeholder involvement and participatory approaches. We propose how wildlife-inclusive urban design could be included into the different steps of the urban planning cycle. We conclude that following these principles will facilitate incorporation of wildlife-inclusive urban design into urban planning and design and enable urban environments where humans and animals can thrive in the built-up areas.</p