In the 12 years since Dudgeon et al.(2006) reviewed major pressures on freshwater
ecosystems, the biodiversity crisis in the world's lakes, reservoirs, rivers, streams and …

As soils develop in humid environments, rock-derived elements are gradually lost, and
under constant conditions it seems that ecosystems should reach a state of profound and …

Building on the success of its 1993 predecessor, this second edition of Geochemistry,
Groundwater and Pollution has been thoroughly re-written, updated and extended to …

Box 9E. 1 Continued FIGURE 2. The C–S–R triangle model (Grime 1979). The strategies at
the three corners are C, competiti-winning species; S, stress-tolerating s-cies; R …

For the past 3.8 billion years, the geochemistry of the Earth's surface-its atmosphere, waters
and exposed crust-has been determined by the presence of biota. Photosynthetic organisms …

Long-term data from the Hubbard Brook Experimental Forest, New Hampshire, suggest that
although changes in stream pH have been relatively small, large quantities of calcium and …

Atmospheric particulate matter (PM) is a heterogeneous material. Though regulated as un-
speciated mass, it exerts most effects on vegetation and ecosystems by virtue of the mass …

Abstract Walker & Syers (1976) proposed a conceptual model that describesthe pattern and
regulation of soil nutrient pools and availability during long-term soil and ecosystem …

The availability or lack of nutrients shapes ecosystems in fundamental ways. From forest
productivity to soil fertility, from the diversity of animals to the composition of microbial …

Rates of acidic deposition from the atmosphere ('acid rain') have decreased throughout the
1980s and 1990s across large portions of North America and Europe,. Many recent studies …