Recent, parallel developments in the study of freshwater and marine ecosystems have
provided evidence that net heterotrophic systems (those in which respiratory organic matter …

The global ocean apparently consumes more organic carbon than it produces. The excess
heterotrophy probably occurs in the nearshore zone. This nearshore heterotrophy has …

For a majority of aquatic ecosystems, respiration (R) exceeds autochthonous gross primary
production (GPP). These systems have negative net ecosystem production ([NEP]=[GPP]–R) …

“Trophic state” is often used to classify aquatic ecosystems according to biotic productivity.
Primary productivity (or a surrogate for it) has always been used as the metric of trophic …

Community respiration (R) rates are scaled as the two-thirds power of the gross primary
production (P) rates of aquatic ecosystems, indicating that the role of aquatic biota as carbon …

We carried out short‐term (2 d) experiments in nine unproductive lakes in northern Sweden
in order to investigate organic carbon sources supporting lake water respiration. Surface …

Abstract 'Blue Carbon', which is carbon captured by marine living organisms, has recently
been highlighted as a new option for climate change mitigation initiatives. In particular …

Eutrophication of fresh waters results in increased CO2 uptake by primary production, but at
the same time increased emissions of CH4 to the atmosphere. Given the contrasting effects …

We measured sediment production of carbon dioxide (CO 2) and methane (CH 4) and the
net flux of CO 2 across the surfaces of 15 boreal and subarctic lakes of different humic …

Estimates of aquatic primary productivity at local, regional or global scales commonly
concentrate on oxygenic photolithotrophy. The analysis presented here briefly considers the …