Methane paradox revisited: Unravelling the impacts of eutrophication on microbia...
Methane paradox revisited: Unravelling the impacts of eutrophication on microbial methane cycling in aquatic ecosystems
Aquatic ecosystems are a major source of the potent greenhouse gas methane, accounting for half of the global methane emissions. Biogenic methane is microbially produced in anoxic sediments and typically rapidly consumed by methan...
Aquatic ecosystems are a major source of the potent greenhouse gas methane, accounting for half of the global methane emissions. Biogenic methane is microbially produced in anoxic sediments and typically rapidly consumed by methanotrophic microorganisms, largely limiting emissions to the atmosphere. However, methane concentrations are often elevated in oxic surface waters of oceans and lakes (“methane paradox”). Aerobic methane production in surface waters might constitute a particularly important source of methane, which, due its proximity to the atmosphere, might escape the aquatic “microbial methane filter”. Yet, we currently lack a comprehensive understanding of the involved processes and microorganisms. Moreover, enhanced eutrophication of coastal ocean and lake ecosystems has been linked to increased methane emissions. Despite the immense importance of methane-cycling microorganisms in controlling emissions from these systems, we know remarkably little on how changes in environmental conditions affect their in situ activities.The METHANIAQ project addresses these knowledge gaps by 1) resolving and quantifying aerobic methane production in surface waters of aquatic ecosystems with different trophic states, and 2) unravelling how eutrophication affects methane-consuming microorganisms in water columns of coastal ocean and lake ecosystems. To tackle these objectives, I will use an innovative combination of approaches, comprising in situ measurements of biogeochemical process rates, manipulation experiments under controlled laboratory conditions, and cutting-edge molecular methods to analyze microbial communities. The proposed approaches will provide an integrated view from the scales of enzymes and microorganisms to ecosystem-level processes spanning marine and freshwater ecosystems. I expect this cross-disciplinary project to generate essential insights into methane cycling dynamics in aquatic ecosystems and their effect on the global climate.ver más
Seleccionando "Aceptar todas las cookies" acepta el uso de cookies para ayudarnos a brindarle una mejor experiencia de usuario y para analizar el uso del sitio web. Al hacer clic en "Ajustar tus preferencias" puede elegir qué cookies permitir. Solo las cookies esenciales son necesarias para el correcto funcionamiento de nuestro sitio web y no se pueden rechazar.
Cookie settings
Nuestro sitio web almacena cuatro tipos de cookies. En cualquier momento puede elegir qué cookies acepta y cuáles rechaza. Puede obtener más información sobre qué son las cookies y qué tipos de cookies almacenamos en nuestra Política de cookies.
Son necesarias por razones técnicas. Sin ellas, este sitio web podría no funcionar correctamente.
Son necesarias para una funcionalidad específica en el sitio web. Sin ellos, algunas características pueden estar deshabilitadas.
Nos permite analizar el uso del sitio web y mejorar la experiencia del visitante.
Nos permite personalizar su experiencia y enviarle contenido y ofertas relevantes, en este sitio web y en otros sitios web.