GLIMPCARBON · Tropical forest soils and climate change: A source or sink for atmospheric carbon?
6РП — Действия „Мария Кюри“
- Период
- 2006-09-01 → 2009-08-31
- Финансиране от ЕС
- 201 713 €
- Участници
- 2
- Схема
- OIF
Линиите свързват координатора с партньорите. За проекти отпреди 2014 г. CORDIS не винаги дава точни координати. Тези точки са на ниво град или държава.
Накратко на български
Почвите в тропическите гори и влиянието на разлагащите се листа и корени върху отделянето на въглероден диоксид са в центъра на анализа. Това помага за по-точното определяне на това дали тези гори задържат въглерода или го отделят в атмосферата.
Кратко обяснение, генерирано от езиков модел по текста на CORDIS. Оригиналът е по-долу.
Резултати накратко
Final Activity Report Summary - GLIMPCARBON (Tropical forest soils and climate change: A source or sink for atmospheric carbon?)
Despite the important role of tropical forest soils in the global carbon cycle, estimates of how much carbon can be sequestered by tropical forests are based mostly on measurements of aboveground tree growth because little is known about carbon cycling in the soil and how it may be affected by climate change. Growth in some tropical forests has increased during recent decades, prompting speculation that this will boost carbon sequestration. However, greater amounts of carbon in dead plant material (in particular leaf litter) may accelerate the decomposition of more stable carbon in stored in the soil, which would greatly reduce the value of tropical forests as a carbon sink. Improved understanding of the belowground carbon cycle and how it interacts with aboveground processes is required to accurately estimate the carbon sequestration potential of tropical forest ecosystems. This project combined litter addition, litter removal, and root exclusion treatments to quantify how much plant roots and decomposing leaf litter contribute to carbon dioxide production in a tropical forest. The results of the project demonstrate that changes in aboveground growth will affect soil microorganisms, the quantity of fine root in the soil and the relative proportions of carbon dioxide being produced by roots, decomposing litter and soil carbon. This may ultimately cause losses of carbon dioxide from the soil.
Текст от CORDIS, на английски · Данни: CORDIS, © Европейски съюз
Цел на проекта
The response of tropical forest ecosystems to global climate change and elevated atmospheric carbon dioxide levels remains poorly understood. Despite the important role of tropical forest soils in the global carbon cycle, estimates of the carbon sequestration potential of tropical forests are based primarily on estimates of aboveground production and biomass, because little is known about belowground carbon cycling and how it may be affected by climate change. Primary production in some tropical forests has increased during recent decades, prompting speculation that this will boost carbon sequestration.However, this response is likely to be limited by nutrient availability. Importantly, greater inputs of readily degradable carbon in leaf litter may accelerate the decomposition of stable soil organic matter, which would greatly reduce the value of the soil as a carbon sink. Improved understanding of the belowground components of the carbon cycle and their interactions with aboveground processes is required to accurately assess the carbon sequestration potential of tropical forest ecosystems.This project combines litter addition, litter removal, fertilization, and root exclusion treatments to quantify the relative contributions of roots, microbes, and leaf lit ter to soil carbon dioxide efflux. The fate of carbon inputs from decomposing leaf litter will be determined by adding litter that is naturally labelled with 13C and analysing microbial biomass, microbial functional types and soil leachate.Changes in soil organic carbon composition will be assessed directly using state of the art nuclear magnetic resonance spectroscopy to detect functional groups representing stable and labile structures. The results will provide key information on the response of tropical forest soils to increased primary productivity. This is of high international importance, because such information is required urgently to calibrate models of future global climate change.
Оригинален текст от CORDIS (на английски).
Участници
- University of Cambridge · CambridgeКоординаторОбединеното кралство
- SMITHSONIAN TROPICAL RESEARCH INSTITUTE · PANAMAНиво градПанама
Връзки
Данни: CORDIS, © Европейски съюз