Substantial decrease in CO emissions from Chinese inland waters due to global change.

Carbon dioxide (CO) evasion from inland waters is an important component of the global carbon cycle. However, it remains unknown how global change affects CO emissions over longer time scales. Here, we present seasonal and annual fluxes of CO emissions from streams, rivers, lakes, and reservoirs throughout China and quantify their changes over the past three decades.

Net landscape carbon balance of a tropical savanna: Relative importance of fire and aquatic export in offsetting terrestrial production.

The magnitude of the terrestrial carbon (C) sink may be overestimated globally due to the difficulty of accounting for all C losses across heterogeneous landscapes. More complete assessments of net landscape C balances (NLCB) are needed that integrate both emissions by fire and transfer to aquatic systems, two key loss pathways of terrestrial C. These pathways can be particularly significant in the wet-dry tropics, where fire plays a fundamental part in ecosystems and where intense rainfall and seasonal flooding can result in considerable aquatic C export (ΣF ).

Land transformation in tropical savannas preferentially decomposes newly added biomass, whether C or C derived.

As tropical savannas are undergoing rapid conversion to other land uses, native C -C vegetation mixtures are often transformed to C - or C -dominant systems, resulting in poorly understood changes to the soil carbon (C) cycle. Conventional models of the soil C cycle are based on assumptions that more labile components of the heterogenous soil organic C (SOC) pool decompose at faster rates. Meanwhile, previous work has suggested that the C -derived component of SOC is more labile than C -derived SOC.

Sources and drivers of contamination along an urban tropical river (Ciliwung, Indonesia): Insights from microbial DNA, isotopes and water chemistry.

Wastewater treatment infrastructure is lacking in many developing countries, often resulting in high loads of contaminants discharged to urban rivers. In these countries, targeted pollution mitigation requires an understanding of where, how and when contaminants enter water bodies. Here we report on contamination of the Ciliwung River, a dynamic, tropical system flowing through the Jakarta metropolitan area (Indonesia).