@article{GuenthelDonisKirillinetal.2019,
  author    = {G{\"u}nthel, Marco and Donis, Daphne and Kirillin, Georgiy and Ionescu, Danny and Bizic, Mina and McGinnis, Daniel F. and Grossart, Hans-Peter and Tang, Kam W.},
  title     = {Contribution of oxic methane production to surface methane emission in lakes and its global importance},
  series = {Nature Communications},
  volume    = {10},
  journal   = {Nature Communications},
  publisher = {Nature Publishing Group UK},
  address   = {London},
  issn      = {2041-1723},
  doi       = {10.1038/s41467-019-13320-0},
  pages     = {10},
  year      = {2019},
  abstract  = {Recent discovery of oxic methane production in sea and lake waters, as well as wetlands, demands re-thinking of the global methane cycle and re-assessment of the contribution of oxic waters to atmospheric methane emission. Here we analysed system-wide sources and sinks of surface-water methane in a temperate lake. Using a mass balance analysis, we show that internal methane production in well-oxygenated surface water is an important source for surface-water methane during the stratified period. Combining our results and literature reports, oxic methane contribution to emission follows a predictive function of littoral sediment area and surface mixed layer volume. The contribution of oxic methane source(s) is predicted to increase with lake size, accounting for the majority (>50\%) of surface methane emission for lakes with surface areas >1 km(2).},
  language  = {en}
}
@article{TangBackhausRiemannetal.2019,
  author    = {Tang, Kam W. and Backhaus, Liv and Riemann, Lasse and Koski, Marja and Grossart, Hans-Peter and Munk, Peter and Nielsen, Torkel Gissel},
  title     = {Copepod carcasses in the subtropical convergence zone of the Sargasso Sea},
  series = {Journal of plankton research},
  volume    = {41},
  journal   = {Journal of plankton research},
  number    = {4},
  publisher = {Oxford Univ. Press},
  address   = {Oxford},
  issn      = {0142-7873},
  doi       = {10.1093/plankt/fbz038},
  pages     = {549 -- 560},
  year      = {2019},
  abstract  = {The oligotrophic subtropical gyre covers a vast area of the Atlantic Ocean. Decades of time-series monitoring have generated detailed temporal information about zooplankton species and abundances at fixed locations within the gyre, but their live/dead status is often omitted, especially in the dynamic subtropical convergence zone (STCZ) where the water column stratification pattern can change considerably across the front as warm and cold water masses converge. We conducted a detailed survey in the North Atlantic STCZ and showed that over 85\% of the copepods were typically concentrated in the upper 200 m. Copepod carcasses were present in all samples and their proportional numerical abundances increased with depth, reaching up to 91\% at 300-400 m. Overall, 14-19\% of the copepods within the upper 200 m were carcasses. Shipboard experiments showed that during carcass decomposition, microbial respiration increased, and the bacterial community associated with the carcasses diverged from that in the ambient water. Combining field and experimental data, we estimated that decomposing copepod carcasses constitute a negligible oxygen sink in the STCZ, but sinking carcasses may represent an overlooked portion of the passive carbon sinking flux and should be incorporated in future studies of carbon flux in this area.},
  language  = {en}
}