UFJF - Universidade Federal de Juiz de Fora

The importance of local and regional factors in regulating microbial carbon flow in aquatic ecosystems of low latitudes RN

Data: 10 de November de 2016

   Human activities have been changing the biosphere in deep ways that alter the quality and functioning of ecosystems. For instance, carbon emissions by fossil fuels have been affecting the aquatic ecosystems organisms physiology and the way they interact in the biosphere, such as metabolic alterations (increase in carbon dissipation). Also, changes in the landscape to agricultural and urban expansion have been leading to higher nutrients loads (especially phosphorous) to aquatic ecosystems, which directly affect productivity, species composition and water quality.

   Thus, ecosystems originally P-limited are becoming P-overloaded, which potential impacts to aquatic organisms. For instance, heterotrophic bacteria, which are central players in the global biogeochemical cycles, directly depend on inorganic P concentration in the water to function. They present a wide range of activities, since organic matter processing, dissimilatory processes and trophic chain that might be affected accordingly to stoichiometry resources requirements changes, due to physiological adaptations.

   Our long-term goal is to understand feedbacks between organisms and their environments as mediated by nutrient and organic carbon requirements. This study is beingdeveloped in the Rio Grande do Norte State inland aquatic ecosystems that comprise a gradient of P and chlorophyll a concentration, from the coastal to the continental areas.

 

Members:

André Megali Amado | Coordinator

Fabio Roland

Luciana Vidal

Hugo Sarmento