Saguaro National Park AQRV's Most surface waters in Saguaro NP
are likely to be well-buffered and, as a result, insensitive to
acidic atmospheric deposition because of an abundance of base
cations in underlying park soils and rocks. However, studies
currently underway have identified certain soils in the park
that appear to be very sensitive to acidification; small
potholes or other waterbodies on these soils may also be
vulnerable to acidification. Small potholes may also be
sensitive to nutrient enrichment from nitrogen deposition.
Nitrogen enrichment may result in algae blooms and oxygen
depletion, but no studies have been done to study these
potential effects in the park. While there have been no
systematic studies, there is currently no information indicating
that wildlife in Saguaro NP are being affected by air
pollutants. Dark night skies are considered an important air
quality related value at Saguaro NP, possessing value as a
cultural, scenic, natural, and scientific resource. Air
pollution and poor