Is this you? As a journalist, you can create a free Muck Rack account to customize your profile, list your contact preferences, and upload a portfolio of your best work.
Claim your profile
Articles by Johan Six
Water quality data from the Paute and Jubones river systems of Ecuador
Abstract In Ecuador, the Paute river basin supports the generation of approximately 40% of the national electricity demand, yet studies on its ecological quality tend to be spatially or temporally limited. Moreover, the underlying raw data often remains unpublished and stored in personal or institutional databases.
False reporting undermines the integrity of supply chain sustainability initiatives
Abstract Supplementary Materials References and Notes Information & Authors Metrics & Citations Check Access References Figures Tables Media Share Abstract As companies increasingly rely on voluntary sustainability standards (VSS), especially certification programs, and payments for ecosystem services (PES) to support sustainability claims and comply with new regulations in global food and resource supply chains, there is an urgent need to understand their credibility.
Lakes that ‘breathe’ ancient carbon: a surprising find in the Congo Basin
In the heart of the Congo Basin’s Cuvette Centrale, a large depression hosting the world’s biggest tropical wetland complex, lie two vast, shallow blackwater lakes, Lake Tumba and Lake Mai Ndombe. Together they are roughly the size of 420,000 football fields. These lakes include extensive swamp forests and peatlands that store enormous amounts of carbon and regulate water flows in the Democratic Republic of Congo.
Fertilizer and soil health for sustained crop production in sub-Saharan Africa: Theory and conceptual framework
Abstract Soil health is the capacity to support the production of food, feed, and fiber while delivering other essential ecosystem services. We suggest key soil health indicators and examine the three-way interactions between mineral fertilizer, crop productivity, and soil health.
Millennial-aged peat carbon outgassed by large humic lakes in the Congo Basin - Nature Geoscience
Abstract Congo Basin lakes Mai Ndombe and Tumba are major CO2 sources. Here we show that their dissolved inorganic carbon is some 2,170–3,515 14C years old and partially (39–40%) originates from the surrounding peatlands. This implies a loss pathway for peat carbon, in which microbes respire old carbon within the peat and the resulting CO2 is transported to the lakes and outgassed, linking these immense ancient stores to the modern carbon cycle.
DRC’s plan for the world’s largest tropical forest reserve would be good for the planet: can it succeed?
The government of the Democratic Republic of Congo passed a law in January 2025 to lead efforts to establish the largest tropical forest reserve in the world. It will be set up as a 2,600km long green corridor the size of France – 540,000km² – situated in the Congo Basin. The green corridor will follow the course of the Congo River, the world’s second largest after the Amazon, which meanders 4,374km in a long arc through central Africa.
Author Correction: Further concepts and approaches for enhancing food system resilience - Nature Food
Correction to: Nature Food https://doi.org/10.1038/s43016-023-00762-5, published online 31 May 2023. In the version of this article initially published, the Acknowledgements did not include thanks to the FOOD TRAILS project, which was funded by the European Union’s Horizon 2020 Research and Innovation programme, grant agreement no. 101000812, to T.A., as is now amended in the HTML and PDF versions of the article. About this article Ingram, J., Bellotti, W., Brklacich, M. et al.
Perceptions of science, science communication, and climate change attitudes in 68 countries – the TISP dataset - Scientific Data
|
Abstract Science is integral to society because it can inform individual, government, corporate, and civil society decision-making on issues such as public health, new technologies or climate change. Yet, public distrust and populist sentiment challenge the relationship between science and society.
By Niels G. Mede, Sebastian Berger, Marina Joubert, Edward Maibach, Sabina Mihelj, Balazs Aczel, Alaa Aldoh, Marlene S. Altenmüller, Ronita Bardhan, Cornelia Betsch, Rahul Bhui, Timothy Callaghan, Steven De Peuter, Kimberly C. Doell, Karen Douglas, Dmitrii Dubrov, Małgorzata Dzimińska, Christian T. Elbaek, Xiaoli Fan, Christina Farhart, Stefan Feuerriegel, Malte Friese, Patricia Garrido-Vásquez, Omid Ghasemi, Claudia González-Brambila, Dmitry Grigoryev, Markus Huff, Younes Jeddi, Dominika Jurgiel, John Kerr Verified, Alexandra I. Kosachenko, Claus Lamm, Aleksandra Lazić, Neil Levy, Chloe Lucas, Mathew D. Marques, Thomas Ostermann, Tobias Otterbring, Philip Pärnamets, Paolo Parra Saiani, Michal Parzuchowski, Yuri G. Pavlov, Adam Pearson, Charlotte R Pennington, Marija Petrovic, Jan Pfänder, Ekaterina Pronizius, Katarzyna Pypno-Blajda, Adrian Rauchfleisch, Felix G. Rebitschek, Jan Philipp Röer, Robert Ross, Philipp Schmid, Emily Shuckburgh, Johan Six, Nevin Solak, Samantha Stanley, Noel Strahm, Stylianos Syropoulos, Barnabas Szaszi, Ewa Szumowska, Boryana Todorova, Abdoul Kafid Toko, Daniel Toribio-Flórez, Michael Tyrala, Jochem van Noord, Steven Verheyen, Madalina Vlasceanu, Marcel Weber, Adrian Wójcik, Ziqian Xia, Ewa Zegler-Poleska
|
Nature
Verified
Ecology & Society: What does it take to build resilience against droughts in food value chains?
Research ABSTRACT Although the impacts of climate change are increasingly challenging food production efforts around the globe, evidence from past studies suggests that adapting and building food systems’ resilience to climate change is not a trivial task. In this study, we adopted a multi-stakeholder perspective by using qualitative and quantitative data to examine the process of building resilience in food value chains against droughts.
Global Change Biology | Environmental Change Journal | Wiley Online Library
Recently, Shang et al. (2024) analyzed 360 observations of soil N2O emissions across 53 sites and showed the inclusion of these emissions during the fallow period—defined as the period between harvest and sowing of the following crop—doubled the N2O emission factor (EF) for N fertilizer from 0.9% to 1.9%. This may be an important finding, supporting the need to improve national greenhouse gas (GHG) inventories based on the IPCC Tier 1 method.
Novel temperatures are already widespread beneath the world’s tropical forest canopies - Nature Climate Change
Abstract Tropical forest biodiversity is potentially at high risk from climate change, but most species reside within or below the canopy, where they are buffered from extreme temperatures. Here, by modelling the hourly below-canopy climate conditions of 300,000 tropical forest locations globally between 1990 and 2019, we show that recent small increases in below-canopy temperature (<1 °C) have led to highly novel temperature regimes across most of the tropics.
Congo's blackwater Ruki River is a major transporter of forest carbon, study shows Original
The Congo Basin of central Africa is well known for its network of rivers that drain a variety of landscapes, from dense tropical forests to more arid and wooded savannas. Among the Congo River's large tributaries, the Ruki is unique in its extremely dark color, which renders the water opaque below a few centimeters' depth. This large blackwater river caught the attention of our carbon biogeochemistry research team when we visited its confluence with the Congo River at the city of Mbandaka.
Congo-Kinshasa: Congo's Blackwater Ruki River Is a Major Transporter of Forest Carbon - New Study
The Congo Basin of central Africa is well known for its network of rivers that drain a variety of landscapes, from dense tropical forests to more arid and wooded savannas. Among the Congo River's large tributaries, the Ruki is unique in its extremely dark colour, which renders the water opaque below a few centimetres' depth. This large blackwater river caught the attention of our carbon biogeochemistry research team when we visited its confluence with the Congo River at the city of Mbandaka.
Congo’s blackwater Ruki River is a major transporter of forest carbon - new study
The Congo Basin of central Africa is well known for its network of rivers that drain a variety of landscapes, from dense tropical forests to more arid and wooded savannas. Among the Congo River’s large tributaries, the Ruki is unique in its extremely dark colour, which renders the water opaque below a few centimetres’ depth. This large blackwater river caught the attention of our carbon biogeochemistry research team when we visited its confluence with the Congo River at the city of Mbandaka.
Correction: Combining organic and mineral fertilizers as a climate-smart integrated soil fertility management practice in sub-Saharan Africa: A meta-analysis
Pauline Chivenge should be included in the author byline instead of the Acknowledgments. Pauline Chivenge should be listed as the sixth author, and their affiliation is 5: International Rice Research Institute (IRRI), Manila, Philippines. The correct citation is: Gram G, Roobroeck D, Pypers P, Six J, Merckx R, Chivenge P, et al. (2020) Combining organic and mineral fertilizers as a climate-smart integrated soil fertility management practice in sub-Saharan Africa: A meta-analysis.
Prolonged water limitation shifts the soil microbiome from copiotrophic to oligotrophic lifestyles in Scots pine mesocosms
INTRODUCTION Climate change is predicted to continue with increased variability in rain and temperature extremes, both inter- and intra-annually (Lee et al., 2021). Although the precipitation projections are variable and region-dependent, the increase in temperature is consistent and stable across the globe (IPCC, 2022).
The robust concept of mineral‐associated organic matter saturation: A letter to Begill et al., 2023
Sequestration of persistent soil organic carbon (SOC) is seen as a cost-effective and scalable CO2 removal strategy, so it is critical to understand whether soils have a finite capacity to store mineral-associated organic C (MAOC)—on average more persistent than particulate organic C (POC).
Further concepts and approaches for enhancing food system resilience - Nature Food
The cornerstones to enhance food system resilience can be considered as three fundamental concepts, the ‘3Rs’1: robustness, based on the capacity of the food system actors to adapt their activities to resist disruptions to desired food system outcomes; recovery, based on the ability of food system actors to adapt their activities so as to be able to return to pre-existing food system outcomes following disruption; and reorientation, based on the ability of food system actors to adapt their...
Performance of a winter wheat composite cross population in two temperate agroforestry systems: a case study
Thank you for your interest in spreading the word about bioRxiv. NOTE: Your email address is requested solely to identify you as the sender of this article. Your Email * Your Name * Send To * Enter multiple addresses on separate lines or separate them with commas. Message Subject (Your Name) has forwarded a page to you from bioRxiv Message Body (Your Name) thought you would like to see this page from the bioRxiv website.
Long-term evidence for ecological intensification as a pathway to sustainable agriculture - Nature Sustainability
Abstract Ecological intensification (EI) could help return agriculture into a ‘safe operating space’ for humanity. Using a novel application of meta-analysis to data from 30 long-term experiments from Europe and Africa (comprising 25,565 yield records), we investigated how field-scale EI practices interact with each other, and with N fertilizer and tillage, in their effects on long-term crop yields.
Distribution patterns of soil organic matter degradation responses to warming
The decomposition of soil organic matter through microorganisms is an important control on the annual release of CO2 from soil to the atmosphere. Given the large amount of carbon stored in soil, the response of microbial respiration to warming is thus a key component to understand terrestrial carbon cycling in a changing world.
Give soils their due
Give soils their due Diana H. Wall1,*, Johan Six2,† 1Diana H. Wall is chair of the Global Biodiversity Initiative and a professor at the School of Global Environmental Sustainability and Department of Biology at Colorado State University, Fort Collins, CO, USA. 2Johan Six is a professor in the Department of Environmental Systems Science at the Swiss Federal Institute of Technology, ETH-Zurich, Switzerland.
Show More
loading
Actions
Is this you?
As a journalist, you can create a free Muck Rack account to customize your profile, list your contact preferences, and upload a portfolio of your best work.Get in touch with Johan
Contact Johan, search articles and posts on X, monitor coverage, and track replies from one place.
Learn more about Muck Rack