scholarly journals (Maintenance of a rural precipitation chemistry CTR at Whiteface Mountain)

1990 ◽  
Author(s):  
Not Given Author
2002 ◽  
Vol 80 (11) ◽  
pp. 1131-1140 ◽  
Author(s):  
Michaela Schmull ◽  
Markus Hauck ◽  
David R Vann ◽  
Arthur H Johnson ◽  
Michael Runge

Epiphytic lichen diversity in a dieback-affected forest of red spruce (Picea rubens Sarg.) and balsam fir (Abies balsamea (L.) Mill.) on Whiteface Mountain, New York, U.S.A., was higher on dead compared with living trees and on fir compared with spruce. Diversity differed more between living and dead spruce than between living and dead fir. Cover of all lichen species that occurred on more than 50% of the sample trees, except for two species, decreased with increasing mean concentration of NO3– in stemflow. Concentrations of NO3– were higher on living spruce compared with dead spruce and with living and dead fir. The negative correlations between lichen cover and NO3– concentration may reflect either a decrease of lichen abundance caused by toxic effects of higher NO3– concentrations or a removal of NO3– from stemflow by epiphytic lichens. Experimental exposure of Hypogymnia physodes to NaNO3 reduced chlorophyll concentrations. This result, together with estimations of lichen and needle biomass, indicates that a dependence of lichen cover on NO3– concentrations in stemflow may be the cause for the negative correlations. The sulphur concentration in stemflow did not affect lichen abundance on Whiteface Mountain. The manganese concentration in stemflow may have an effect on single species.Key words: forest dieback, manganese, nitrate assimilation, nitrate toxicity, precipitation chemistry, sulphur.


2016 ◽  
Vol 16 (3) ◽  
pp. 841-854 ◽  
Author(s):  
James J. Schwab ◽  
Paul Casson ◽  
Richard Brandt ◽  
Liquat Husain ◽  
Vincent Dutkewicz ◽  
...  

2009 ◽  
Vol 43 (17) ◽  
pp. 2709-2716 ◽  
Author(s):  
Nenad Aleksic ◽  
K. Roy ◽  
G. Sistla ◽  
J. Dukett ◽  
N. Houck ◽  
...  

Author(s):  
James S. Webber

INTRODUCTION“Acid rain” and “acid deposition” are terms no longer confined to the lexicon of atmospheric scientists and 1imnologists. Public awareness of and concern over this phenomenon, particularly as it affects acid-sensitive regions of North America, have increased dramatically in the last five years. Temperate ecosystems are suffering from decreased pH caused by acid deposition. Human health may be directly affected by respirable sulfates and by the increased solubility of toxic trace metals in acidified waters. Even man's monuments are deteriorating as airborne acids etch metal and stone features.Sulfates account for about two thirds of airborne acids with wet and dry deposition contributing equally to acids reaching surface waters or ground. The industrial Midwest is widely assumed to be the source of most sulfates reaching the acid-sensitive Northeast since S02 emitted as a byproduct of coal combustion in the Midwest dwarfs S02 emitted from all sources in the Northeast.


2021 ◽  
Vol 247 ◽  
pp. 118219
Author(s):  
Michael R. McHale ◽  
Amy S. Ludtke ◽  
Gregory A. Wetherbee ◽  
Douglas A. Burns ◽  
Mark A. Nilles ◽  
...  

1992 ◽  
Vol 21 (3) ◽  
pp. 345-352 ◽  
Author(s):  
E.K. Miller ◽  
T.G. Huntington ◽  
A.H. Johnson ◽  
A.J. Friedland

1996 ◽  
Vol 30 (4) ◽  
pp. iv
Author(s):  
Haider A. Khwaja ◽  
Sara Brudnoy ◽  
Liaquat Husain

Sign in / Sign up

Export Citation Format

Share Document