Articles

Tailor-made biochar systems: Interdisciplinary evaluations of ecosystem services and farmer livelihoods in tropical agro-ecosystems

Organic matter management is key to sustain ecosystem services provided by soils. However, it is rarely considered in a holistic view, considering local resources, agro-environmental effects and harmonization with farmers’ needs. Organic inputs, like compost and biochar, could represent a sustainable solution to massive current challenges associated to the intensification of agriculture, in particular for […]

Events

Handing over of equipment to DALaM and MouNoy Dev

As part of the long-term collaboration between IRD (UMRs iEES-Paris and GET) and its Lao partners, which has resulted into the implementation of several partnership instruments such as the JEAI-EcoRubber, the LMI LUSES, and more recently the PSF-Sud AgreesLao, GDRI CompacSol, as well as the CZO M-TROPICS and the SEALNET network, in January 2022 research/production […]

Articles

Soil organic carbon stocks and quality in small-scale tropical, sub-humid and semi-arid watersheds under shrubland and dry deciduous forest in southwestern India

Soil organic carbon stocks and quality in small-scale tropical, sub-humid and semi-arid watersheds under shrubland and dry deciduous forest in southwestern India. Soil organic carbon is regulated by a dynamic interaction between vegetation inputs, organic matter degradation, and stabilization processes in soils, and its redistribution in the landscape. Many processes of the soil carbon cycle […]

Events

Dissemination of pathogenic bacteria in tropical hydrosystems: transport and fate of Escherichia coli in the Mekong watershed in Lao PDR

Paty Nakhle, PhD student within M-TROPICS CZO, defended her PhD thesis today at GET. Fecal contamination of surface water remains a major threat to public health especially in the rural areas of developing countries. Over 70 million people depend on unimproved water resources in the lower Mekong basin. Diarrheal diseases are a leading cause of […]

Articles

In-stream Escherichia coli modeling using high-temporal-resolution data with deep learning and process-based models

Contamination of surface waters with microbiological pollutants is a major concern to public health. Although long-term and high-frequency Escherichia coli (E. coli) monitoring can help prevent diseases from fecal pathogenic microorganisms, such monitoring is timeconsuming and expensive. Process-driven models are an alternative means for estimating concentrations of fecal pathogens. However, process-based modeling still has limitations […]

Articles

Overland flow during a storm event strongly affects stream water chemistry and bacterial community structure

As flood events are expected to become more frequent due to climate change, investigating how overland flow exports terrestrial nutrients, carbon and living organisms into aquatic systems is essential for understanding both soil and stream ecosystem status. In this paper led by Huong Le, former PhD student at iEES Paris, the authors assessed how dissolved […]

Events

Land use, surface runoff, soil erosion: multi-scale impact assessment of teak tree plantation management in a tropical humid mountainous agro-ecosystem

Layheang Song, PhD student within M-TROPICS CZO, defended his thesis today at GET. His thesis work was under the international double degree program between the University Paul Sabatier and the Institute of Technology of Cambodia. Soil erosion is one of the most concerning environmental problems on the global scale. Soil erosion is increasingly driven by […]

Conferences

Interactions between surface and deep critical zone: case of South India ecosystems and agrosystems

One of the major interests of long-term critical zone observatories is to study and model the interactions between the different compartments that compose the critical zone, and in particular the feedback loops between surface and deep critical zone that affect the hydrological and geochemical cycles. The importance of these feedbacks was illustrated by salient results […]

Missions

Field campaign in Cameroon to study biogeochemical cycles and weathering in a tropical context

On September 19-25, Jean Riotte, Christelle Lagane, and Jean-Jacques Braun from GET/IRD participated to a field campaign at the Nsimi experimental watershed, monitored within the M-TROPICS CZO. Recently, the land use in Nsimi watershed has been changed to agriculture mixed with residual forest and fallow. The objective of the mission was thus to start the […]