Microbial Role in the Carbon Cycle in Tropical Inland Aquatic EcosystemsAndré Megali Amado, Fábio Roland Frontiers Media SA, Mar 15, 2017 Aquatic microorganisms are tidily related to the carbon cycle in aquatic systems, especially in respect to its accumulation and emission to atmosphere. In one hand, the autotrophs are responsible for the carbon input to the ecosystems and trophic chain. On the other hand, the heterotrophs traditionally play a role in the carbon mineralization and, since microbial loop theory, may play a role to carbon flow through the organisms. However, it is not yet clear how the heterotrophs contribute to carbon retention and emission especially from tropical aquatic ecosystems. Most of the studies evaluating the role of microbes to carbon cycle in inland waters were performed in high latitudes and only a few studies in the tropical area. In the prospective of global changes where the warm tropical lakes and rivers become even warmer, it is important to understand how microorganisms behave and interact with carbon cycle in the Earth region with highest temperature and light availability. This research topic documented microbial responses to natural latitudinal gradients, spatial within and between ecosystems gradients, temporal approaches and temperature and nutrient manipulations in the water and in the sediment. |
Contents
Microbial Role in the Carbon Cycle in Tropical Inland Aquatic Ecosystems | 6 |
Tropical freshwater ecosystems have lower bacterial growth efficiency than temperate ones | 9 |
Does Latitude Make a Difference? | 17 |
Potential changes in bacterial metabolism associated with increased water temperature and nutrient inputs in tropical humic lagoons | 28 |
Experimental evidence of nitrogen control on pCO2 in phosphorusenriched humic and clear coastal lagoon waters | 38 |
High Primary Production Contrasts with Intense Carbon Emission in a Eutrophic Tropical Reservoir | 44 |
Hydrological pulse regulating the bacterial heterotrophic metabolism between Amazonian mainstems and floodplain lakes | 57 |
Viruses and bacteria in floodplain lakes along a major amazon tributary respond to distance to the amazon river | 67 |
Dynamics of planktonic prokaryotes and dissolved carbon in a subtropical coastal lake | 77 |
Environmental dynamics as a structuring factor for microbial carbon utilization in a subtropical coastal lagoon | 86 |
Lower respiration in the littoral zone of a subtropical shallow lake | 105 |
Spatial variation of sediment mineralization supports differential CO2 emissions from a tropical hydroelectric reservoir | 115 |
Development of temporary subtropical wetlands induces higher gas production | 123 |
Extreme emission of N2O from tropical wetland soil Pantanal South America | 132 |
Back cover | 145 |