The effects of increased atmospheric nitrogen inputs, from both NOy and NHx, on diversity in
various semi‐natural and natural ecosystems are reviewed. The severity of these impacts …

The global nitrogen cycle has been greatly perturbed by human activities resulting in
elevated nitrogen deposition in many parts of the world. The threat nitrogen deposition …

A working checklist of accepted taxa worldwide is vital in achieving the goal of develo**
an online flora of all known plants by 2020 as part of the Global Strategy for Plant …

Nitrogen (N) and phosphorus (P) availability limit plant growth in most terrestrial ecosystems.
This review examines how variation in the relative availability of N and P, as reflected by N …

Many chemical reactions at the Earth's surface are influenced by biota. Ecosystem
ecologists study the flow of matter and energy in ecosystems composed of organisms and …

The possible effects of climate change on the advance of the tree line are considered. As
temperature, elevated CO2 and nitrogen deposition co‐vary, it is impossible to disentangle …

Plant specimens stored in herbaria are being used as never before to document the impacts
of global change on humans and nature. However, published statistics on the use of …

The deposition of anthropogenically fixed nitrogen (N) from the atmosphere onto land and
plant surfaces has strong influences on terrestrial ecosystem processes. Although recent …

Experimental doubling of ambient CO2 partial pres-sures (Ca) above current day levels,
from 32-35 to 65-70 Pa, results in an increase in plant growth rate of-37 to 495%(Kimball …

Raised bogs are among the ecosystems most susceptible to atmospheric nitrogen pollution.
Based on global data ranging from pristine to heavily polluted areas, a conceptual model is …