Temporal variability of water chemistry in flowing waters of the northeastern United States: does river size matter?

2001 ◽  
Vol 20 (3) ◽  
pp. 331-346 ◽  
Author(s):  
John Chételat ◽  
Frances R. Pick
Keyword(s):  
United States ◽  
Water Chemistry ◽  
Temporal Variability ◽  
Northeastern United States ◽  
Flowing Waters ◽  
Size Matter ◽  
River Size

Phosphorus Deficiency and its Variation among Lakes

1990 ◽  
Vol 47 (6) ◽  
pp. 1077-1084 ◽  
Author(s):  
David J. Currie
Keyword(s):  
United States ◽  
Seasonal Variation ◽  
Water Chemistry ◽  
Rate Constant ◽  
Seasonal Variability ◽  
Bacterial Abundance ◽  
Phosphorus Deficiency ◽  
Northeastern United States ◽  
P Deficiency ◽  
P Concentration

The severity of phosphorus deficiency varies greatly among lakes. Is this variation related to particular morphological, chemical, or biological characteristics of lakes? These questions were addressed by sampling 49 lakes in Quebec, Ontario, and the northeastern United States. The rate constant of orthophosphate uptake (k1), a measure of orthophosphate demand:supply, proved to be only weakly related to watershed area and to the total phosphorus (P) concentration of the water (R2 = 0.210). Abundance of the biota and other aspects of water chemistry were all unrelated to the intensity of P-deficiency as it varies among lakes. In contrast, within-lake seasonal variability of the rate constant of orthophosphate turnover (kt, which is approximately equal to k1) is strongly related to temperature and bacterial abundance (R2 = 0.575 to 0.828). The results indicate that the seasonal variation in phosphorus deficiency depends strongly on bacterioplankton activity, whereas inter-lake variability in phosphorus deficiency is determined mainly by factors other than morphometry, plankton abundance, or trophic richness.

Monitoring air quality in class I wilderness areas of the northeastern United States using lichens and bryophytes

2016 ◽  
Author(s):  
Alison C. Dibble ◽  
James W. Hinds ◽  
Ralph Perron ◽  
Natalie Cleavitt ◽  
Richard L. Poirot ◽  
...  
Keyword(s):  
United States ◽  
Air Quality ◽  
Class I ◽  
Northeastern United States ◽  
Wilderness Areas
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