Claude Garcia

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Garcia

First Name

Claude

ORCID

0000-0002-7351-0226

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Publications 1 - 10 of 20

Geo-Based Assessment of Vegetation Health Related to Agroecological Practices in the Southeast of Togo
Folega, Fousseni; Atakpama, Wouyo; Pereki, Hodabalo; et al. (2023)
Applied Sciences
In the context of climate change, the need to contribute to achieving Sustainable Development Goal (SDG) 2 is no longer in doubt, especially in sub-Saharan Africa. In this study of the landscape within 10 km of the Donomadé model farm, southeastern Togo, researchers sought to assess vegetation health in ecosystems and agrosystems, including their capacity to produce biomass for agroecological practices. Sentinel-2 sensor data from 2015, 2017, 2020, and 2022 were preprocessed and used to calculate the normalized vegetation fire ratio index (NBR), the vegetation fire severity index (dNBR), and CASA-SEBAL models. From these different analyses, it was found that vegetation stress increased across the landscape depending on the year of the time series. The research estimated that 9952.215 ha, 10,397.43 ha, and 9854.90 ha were highly stressed in 2015, 2017, and 2020, respectively. Analysis of the level of interannual severity revealed the existence of highly photosynthetic areas that had experienced stress. These areas, which were likely to have been subjected to agricultural practices, were estimated to be 8704.871 ha (dNBR2017–2015), 8253.17 ha (dNBR2020–2017), and 7513.93 ha (dNBR2022–2020). In 2022, the total available biomass estimated by remote sensing was 3,741,715 ± 119.26 kgC/ha/y. The annual average was 3401.55 ± 119.26 kgC/ha/y. In contrast, the total area of healthy vegetation was estimated to be 4594.43 ha, 4301.30 ha, and 4320.85 ha, in 2015, 2017, and 2022, respectively. The acceptance threshold of the net primary productivity (NPP) of the study area was 96%. The coefficient of skewness (0.81 ± 0.073) indicated a mosaic landscape. Productive and functional ecosystem components were present, but these were highly dispersed. These findings suggest a great opportunity to promote agroecological practices. Mulching may be an excellent technique for enhancing overall ecosystem services as targeted by the SDGs, by means of reconversion of plant biomass consumed by vegetation fires or slash-and-burn agricultural practices.
Response to Comments on "The global tree restoration potential"
Bastin, Jean-François; Finegold, Yelena; Garcia, Claude; et al. (2019)
Science
Hunting in Times of Change: Uncovering Indigenous Strategies in the Colombian Amazon Using a Role-Playing Game
Ponta, Nicole; Cornioley, Tina; Dray, Anne; et al. (2019)
Frontiers in Ecology and Evolution
Despite growing industrialization, the shift to a cash economy and natural resource overexploitation, indigenous people of the Amazon region hunt and trade wildlife in order to meet their livelihood requirements. Individual strategies, shaped by the hunters' values and expectations, are changing in response to the region's economic development, but they still face the contrasting challenges of poverty and overhunting. For conservation initiatives to be implemented effectively, it is crucial to take into account people's strategies with their underlying drivers and their adaptive capabilities within a transforming socio-economic environment. To uncover hunting strategies in the Colombian Amazon and their evolution under the current transition, we co-designed a role-playing game together with the local stakeholders. The game revolves around the tension between ecological sustainability and food security—hunters' current main concern. It simulates the mosaic of activities that indigenous people perform in the wet and dry season, while also allowing for specific hunting strategies. Socio-economic conditions change while the game unfolds, opening up to emerging alternative potential scenarios suggested by the stakeholders themselves. Do hunters give up hunting when given the opportunity of an alternative income and protein source? Do institutional changes affect their livelihoods? We played the game between October and December 2016 with 39 players—all of them hunters—from 9 different communities within the Ticoya reserve. Our results show that providing alternatives would decrease overall hunting effort, but impacts are not spatially homogenous. Legalizing trade could lead to overhunting except when market rules and competition come into place. When it comes to coupled human-nature systems, the best way forward to produce socially just and resilient conservation strategies might be to trigger an adaptive process of experiential learning and scenario exploration. The use of games as “boundary objects” can guide stakeholders through the process, eliciting the plurality of their strategies, their drivers and how outside change affects them.
“I remember your lecture”: role-playing games and unconventional teaching reinforce learning outcomes
Steiner, Eliane; Garcia Ulloa, John Alejandro; Ghazoul, Jaboury; et al. (2020)
ETH Learning and Teaching Journal
To familiarize students with today’s challenges in the field of ecosystem management, the environmental sciences master program offers a course for students called Foundations of Ecosystem Management. The aim of this course is to create an effective learning experience and develop critical thinking capacities for future natural resource managers and academics. The course is structured into various parts where students first elaborate on the definition of the theoretical foundations and concepts. In a next step, they use this definition to work on real-world case studies. During their groupwork, they construct a role-playing game that addresses the most prominent issues in the system and thereby learn to understand and deal with the complexity of the management issues. At the same time, students are trained in soft skills like teamwork, self-reflection, debriefing, and facilitation. In this paper, we present the structure of the course and results from an online survey done by students from the last 5 years. We assessed how well former students remember the course and the theory they learnt and how they perceived the teaching approach. We found positive results: students appreciate the different teaching approach and most of the students, including students from earlier cohorts, state that they still remember the concepts. Students report that they have applied the concepts and approaches from the course in other contexts outside the classroom. We, as teaching staff, reflect on the course, the learning experience, and the results from the online survey, and present four teaching principles that underline what has worked in the course: i) self-authorship, ii) education through active and experiential learning, iii) competence-oriented learning on soft skills: self-reflection, teamwork, and facilitation, and finally iv) inter-cultural learning.
Definitions of and Perspectives on Forests of High Value: A Systematic Map Protocol
Savilaakso, Sini; Lausberg, Nik; Garcia, Claude; et al. (2021)
Forests
Forests are defined in many different ways. Apart from ecological and structural factors, associated values and provided ecosystem services are an important part of forest definitions. Typically, forest types are differentiated based on climatic regions and on degrees of human modification. A better understanding of how to distinguish different forests on the basis of the values they provide is needed to advance global policies put forward by organisations such as the Convention on Biological Diversity (CBD), the United Nations Framework Convention on Climate Change (UNFCCC), or the UN Sustainable Development Goals (SDGs). These policies so far approach all forests in a similar manner, regardless of their condition. Without this distinction, benefits stemming from forest intactness and their contribution to global environmental challenges remain unaccounted for. Forest definitions provide the basis for policies and monitoring systems driving or enabling deforestation, degradation, reforestation, and restoration. Here, we provide a systematic approach to disentangle and synthesise different value classifications of forests. As part of a collaboration between ETH Zurich, the French Agricultural Research Centre for International Development (CIRAD), the University of Liège and Biotope, Forest Stewardship Council International (FSC) commissioned a systematic map that aims to clarify how definitions of forests of high value are understood and described. Focusing on forests of high value, the systematic map will address three research questions: (1) How are various terms linked to forests of high value defined in the literature?; (2) Do definitions vary between different actors?; and (3) How common are the various definitions? Bibliographic databases and organisational websites will be searched, and internet search engines used to find relevant peer-reviewed and grey literature. The searches will be conducted in English, French and Spanish. Data extraction and coding will be performed at the same time when full texts are considered for inclusion. Definitions will be extracted as well as their respective sources and other study information. We will produce a catalogue of definitions for different terms associated with forests of high value, a narrative synthesis describing the evidence base, and visualisations illustrating the relationships between definitions and terms for forests of high value and their frequencies in the literature.
Overview of evidence on mechanisms affecting the outcomes of terrestrial multiple-use protected areas
Stoudmann, Natasha; Savilaakso, Sini; Waeber, Patrick O.; et al. (2023)
One Earth
Multiple-use protected areas (PAs) aim to safeguard biodiversity and contribute to human well-being, making them key instruments in meeting the Kunming-Montreal Global Biodiversity Framework (GBF) goals. However, it is currently unclear what evidence exists on the impacts of human activities performed within them. This limits our understanding of how multiple-use PAs are expected to meet their dual objectives. Here, we aim to address this gap by collating evidence relating to human activities taking place within multiple-use PAs globally. Results show that few studies have a low risk of bias, and study locations are not representative of PAs’ geographical distribution. Activities putting the greatest pressure on PAs’ biodiversity are not those most often researched, and studies on ecological outcomes outweigh socioeconomic ones. To be able to track progress toward achieving the GBF goals, we need to improve the quality of evidence, engage at the local level, and focus on knowledge gaps that are aligned with protected area targets.
Structuring the complexity of integrated landscape approaches into selectable, scalable, and measurable attributes
Waeber, Patrick O.; Carmenta, Rachel; Estrada Carmona, Natalia; et al. (2023)
Environmental Science & Policy
Integrated landscape approaches (ILA) aim to reconcile multiple, often competing, interests across agriculture, nature conservation, and other land uses. Recognized ILA design principles provide guidance for implementation, yet application remains challenging, and a strong performance evidence-base is yet to be formed. Through a critical literature review and focus group discussions with practitioners, we identified considerable diversity of ILA in actors, temporal, and spatial scales, inter alia. This diversity hampers learning from and steering ILA because of the intractable nature of the concept. Therefore, we developed a tool—an ‘ILA mixing board’—to structure the complexity of ILA into selectable and scalable attributes in a replicable way to allow planning, diagnosing, and comparing ILA. The ILA mixing board tool presents seven qualifiers, each representing a key attribute of ILA design and performance (for example, project flexibility, inclusiveness of the dialogue, and the centrality of the power distribution). Each qualifier has five (non-normative) outcome indicators that can be registered as present or absent. This process in turn guides planners, evaluators and other participating stakeholders involved in landscape management to diagnose the ILA type, or its performance. We apply the ILA mixing board to three ILA cases in Nicaragua, Madagascar, and the Congo Basin to show some of the many possible configurations of qualifiers on the mixing board. Further application of the tool would allow comparative analysis of the complexity of ILA in a structured and manageable way thereby enhancing the understanding of ILA performance and informing the development of evidence-based land use policy.
Drivers of transgression: What pushes people to enter protected areas
Ponta, Nicole; Cornioley, Tina; Waeber, Patrick O.; et al. (2021)
Biological Conservation
The establishment of protected areas is central to biodiversity conservation strategies. However, they often fail in meeting their expectations, especially in the tropics. One core reason for their failure is human pressure. Protected area transgression has tremendous impacts on biodiversity, but also on persecuted rule-breakers whose necessities are often ignored. Despite the increasing enforcement of strict protection rules, non-compliance is a phenomenon experienced in protected areas around the world. To improve biodiversity and social outcomes of any conservation intervention, we need to understand what drives transgressive behavior but also the gazettement of protected areas. By using a role-playing game with Indigenous people in the Colombian Amazon we were able to openly discuss transgression. In the game, park managers designed protected areas primarily for biodiversity conservation but also for restoration. Communication among stakeholders and a resource-abundant landscape were key to increase compliance without exerting enforcement while the violations history of the protected area as well as the abundance of resources within its boundaries encouraged transgression. To achieve voluntary compliance, we recommend to acknowledge transgression’s multidimensionality and integrate it into conservation planning.
Erweiterte Diskussionsplattform zur internationalen Waldpolitik (IDANE Wald+)
Zabel, Astrid; Lieberherr, Eva; Dürr, Christoph; et al. (2022)
Schweizerische Zeitschrift für Forstwesen
Der «IDANE Wald+ Science-Policy Dialogue» ist eine erweiterte Diskussionsplattform zu internationalen waldpolitischen Themen mit spezifischen Beiträgen aus der Schweizer Wissenschaft. Im Dezember 2021 organisierte die Abteilung Wald des Bundesamts für Umwelt (BAFU) die erste Sitzung des IDANE Wald+. Die zweite Sitzung findet im Oktober 2022 zum Thema «Wald, Bäume und Partnerschaften» statt. Neben Diskussionsplattformen gibt es diverse weitere Gefässe und Gestaltungsmöglichkeiten für den Austausch zwischen Politik und Wissenschaft. Dazu gehören verschiedene Beratermodelle. Diese werden hier vorgestellt und mit Beispielen aus dem waldpolitischen Kontext erläutert.
Coffee monoculture trends in tropical agroforested landscapes of Western Ghats (India)
Gaucherel, Cédric; Alet, Julie; Garcia, Claude (2017)
Environmental Conservation
Against the backdrop of the competing demands of agricultural productivity and biodiversity conservation, understanding land-use changes is critical. We studied the past, current and future landscape–dynamic scenarios for coffee and rice-coupled crops at a village scale in the Western Ghats (southern India) by integrating three levels of organization (patch, farm and soils). The village structures and dynamics from 1950 to 2010 were modelled with the Dynamic Patch Landscape (DYPAL) modelling platform and analysed with Comparison Map Profile (CMP) spatial analysis in order to assess environmental trends. Our model, combined with mathematical formalizations and multiscale analyses, was also used to project future land-use sustainability. Our findings highlight significant environmental issues affecting the Western Ghats biodiversity hotspot, which is also subject to increasing and differential demands for other crops that are dependent on farm production systems. Intensive coffee cultivation, with conversion of the forest cover into Grevillea robusta monoculture and ongoing paddy abandonment, have had a strong impact on the region's landscape (+30% G. robusta) and biodiversity (from –3% to –13% in the already-reduced forest cover).

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