Microbial necromass is a large, dynamic and persistent component of soil organic carbon,
the dominant terrestrial carbon pool. Quantification of necromass carbon stocks and its …

It is well established that greenhouse conditions prevailed during the Cretaceous Period (~
145–66 Ma). Determining the exact nature of the greenhouse-gas forcing, climatic warming …

Climate change is a critical factor affecting biodiversity. However, the quantitative
relationship between temperature change and extinction is unclear. Here, we analyze …

Dissolved oxygen (O2) is essential for most ocean ecosystems, fuelling organisms'
respiration and facilitating the cycling of carbon and nutrients. Oxygen measurements have …

Glycerol dialkyl glycerol tetraether (GDGT) lipids are membrane lipids which were long
thought to be synthesized mainly by archaea, organisms thought to be limited to extreme …

The early Eocene (56 to 48 million years ago) is inferred to have been the most recent time
that Earth's atmospheric CO 2 concentrations exceeded 1000 ppm. Global mean …

Several studies have shown that there is a strong relationship between the distribution of
crenarchaeotal isoprenoid glycerol dibiphytanyl glycerol tetraethers (GDGTs) and sea …

Molecular organic geochemical proxies are increasingly being utilized to reconstruct past
environmental conditions as new tools continue to be discovered and developed. To date …

Agricultural ecosystems annually receive approximately 25% of the global nitrogen input,
much of which is oxidized at least once by ammonia‐oxidizing prokaryotes to complete the …

Over the last years a novel group of branched glycerol dialkyl glycerol tetraether (GDGT)
membrane lipids has been discovered in peat bogs and soils. They consist of components …