Nitrogen availability is a pivotal control on terrestrial carbon sequestration and global
climate change. Historical and contemporary views assume that nitrogen enters Earth's land …

Nitrogen (N) limits the productivity of many ecosystems worldwide, thereby restricting the
ability of terrestrial ecosystems to offset the effects of rising atmospheric CO2 emissions …

There is a growing interest in the role of bedrock in global nitrogen cycling and potential for
increased ecosystem sensitivity to human impacts in terrains with elevated background …

In arid environments such as deserts, nitrogen is often the most limiting nutrient for biological
activity. The majority of the ecosystem nitrogen flux is typically thought to be driven by …

Follow the water” is the mantra used by NASA in the search for life in the universe. It is hard
to imagine life without a fluid, or to imagine that the fluid could be anything other than water …

Reactive nitrogen species have a strong influence on atmospheric chemistry and climate,
tightly coupling the Earth's nitrogen cycle with microbial activity in the biosphere. Their …

A large reservoir of bioavailable nitrogen (up to∼ 104 kilograms of nitrogen per hectare, as
nitrate) has been previously overlooked in studies of global nitrogen distribution. The …

Early in Earth's history, the Sun provided less energy to the Earth than it does today.
However, the Earth was not permanently glaciated, an apparent contradiction known as the …

Additions of reactive nitrogen to terrestrial ecosystems—primarily through fertilizer
application and atmospheric deposition—have more than doubled since 1860 owing to …

Human activities have greatly accelerated emissions of both carbon dioxide and biologically
reactive nitrogen to the atmosphere,. As nitrogen availability often limits forest productivity, it …