Claim · model-written summary
Acid rain inputs sufficient to cause acute forest growth responses are apparently rare under ambient field conditions.
Verbatim
e0“Acid rain inputs of sufficient magnitude to cause acute effects, such as growth increase due to N mobilization or growth decrease due to Al mobilization, are apparently very rare under ambient field conditions”
t0“forest”
Title
The effects of acid rain on forest nutrient status
Dale W. Johnson; John Turner; J. M. Kelly Water Resources Research 1982. doi:10.1029/wr018i003p00449
Other claims from this paper (8)
- Mechanism Anion immobilization can prevent cation leaching in forest soil.
- Mechanism Soil acidification requires acid inputs to exceed buffering and weathering to fail to replace leached cations.
- Observation Moderately acid soils with low cation exchange capacity are considered most sensitive to change.
- Observation Very acid and neutral highly buffered soils are considered insensitive to acid rain acidification.
- Mechanism At extremely high inputs, acid rain may increase nitrogen mineralization, nitrification, and soil aluminum mobilization.
- Mechanism Increased nitrogen availability can temporarily increase growth in nitrogen deficient forests.
- Mechanism Increased aluminum availability can cause toxicity in tree roots.
- Association Long term effects on forest nutrient status may be beneficial or adverse depending on site nutrients, management, and atmospheric inputs.