scholarly journals Historical changes in sediments of Pyramid Lake, Nevada, USA: consequences of changes in the water balance of a terminal desert lake

1994 ◽  
Vol 12 (2) ◽  
pp. 87-101 ◽  
Author(s):  
Martin E. Lebo ◽  
John E. Reuter ◽  
Philip A. Meyers
Keyword(s):  
Water Balance ◽  
Historical Changes ◽  
Pyramid Lake ◽  
Desert Lake

The importance of nitrogen in Pyramid Lake (Nevada, USA), a saline, desert lake

Hydrobiologia ◽  
1993 ◽  
Vol 267 (1-3) ◽  
pp. 179-189 ◽  
Author(s):  
John E. Reuter ◽  
Cathryn L. Rhodes ◽  
Martin E. Lebo ◽  
Mandy Kotzman ◽  
Charles R. Goldman
Keyword(s):  
Pyramid Lake ◽  
Saline Desert ◽  
Desert Lake

The importance of nitrogen in Pyramid Lake (Nevada, USA), a saline, desert lake

1993 ◽  
pp. 179-189 ◽  
Author(s):  
John E. Reuter ◽  
Cathryn L. Rhodes ◽  
Martin E. Lebo ◽  
Mandy Kotzman ◽  
Charles R. Goldman
Keyword(s):  
Pyramid Lake ◽  
Saline Desert ◽  
Desert Lake

Magnitude of Blue-Green Algal Blooms in a Saline Desert Lake Evaluated by Remote Sensing: Evidence for Nitrogen Control

1988 ◽  
Vol 45 (11) ◽  
pp. 1959-1967 ◽  
Author(s):  
David L. Galat ◽  
James P. Verdin
Keyword(s):  
Surface Water ◽  
Algal Blooms ◽  
Inorganic Nitrogen ◽  
Seasonal Succession ◽  
Climatic Forcing ◽  
Pyramid Lake ◽  
Green Algal ◽  
Mixing Patterns ◽  
Saline Desert ◽  
Desert Lake

Seventy-six percent of the 1972–86 variability in remotely sensed maximum surface water biomass of Nodularia spumigena blooms in Pyramid Lake, Nevada, was explained by concentrations of surface water total nitrogen (TN) during the preceding winter circulation. Very large summer–autumn Nodularia blooms were recorded by Landsat subsequent to low early winter surface water TN concentrations, very low fluvial discharge, and fluvial TN loads as predicted, but contrary to predictions, also when fluvial discharge and TN loads were very high. The observed cause of large Nodularia blooms following high fluvial nitrogen influx was temporary meromixis produced by the large volume of freshwater transporting this nitrogen. Incomplete winter lake circulation reduced internal transport of hypolimnetic nitrogen to surface waters. Meromixis resulted in early stable summer thermal stratification and early depletion of epilimnetic inorganic nitrogen, followed by early and large Nodularia blooms. Variations in magnitude of historic Nodularia blooms in a saline desert lake support the generality of blue-green algal dominance in lakes with low nitrogen and high phosphorus concentrations (i.e. low N:P ratios). However, climatic forcing of fluvial discharge and lake mixing patterns were also shown to be important determinants of seasonal succession of phytoplankton to blue-greens.

Interannual Variability of Nitrogen Limitation in a Desert Lake: Influence of Regional Climate

1994 ◽  
Vol 51 (4) ◽  
pp. 862-872 ◽  
Author(s):  
Martin E. Lebo ◽  
John E. Reuter ◽  
Charles R. Goldman ◽  
Cathryn L. Rhodes
Keyword(s):  
Regional Climate ◽  
Nutrient Status ◽  
Weather Data ◽  
Systematic Evaluation ◽  
Nutrient Ratios ◽  
N Availability ◽  
Pyramid Lake ◽  
N Limitation ◽  
Climatic Variations ◽  
Desert Lake

A systematic evaluation of limnological and experimental indicators of nutrient limitation in Pyramid Lake during 1989–92 clearly show that N is the nutrient most limiting to phytoplankton. This conclusion is supported by dissolved inorganic nutrient ratios, seston elemental composition, nutrient enrichment bioassay experiments, and blooms of N2-fixing algae. However, the degree of N limitation expressed during the three years varied considerably. A comparison of interannual patterns of N limitation with weather data collected at the lake suggests that differences among years can be attributed to climatic variations. Our study indicates that climatic variations affect N availability by altering the timing of winter deep mixing, varying the potential for upwelling during spring, and varying the rate of spring warming of surface waters. Summer wind patterns also appear to be an integral factor controlling initiation, development, and collapse of the annual bloom of Nodularia spumigena, a N2-fixing blue-green alga. The results of this study emphasize the need to consider climatic variations in assessing the general nutrient status of lakes.

Water balance, drought stress and yields for rainfed field crop rotations under present and future conditions in the Czech Republic

2015 ◽  
Vol 65 ◽  
pp. 175-192 ◽  
Author(s):  
P Hlavinka ◽  
KC Kersebaum ◽  
M Dubrovský ◽  
M Fischer ◽  
E Pohanková ◽  
...  
Keyword(s):  
Czech Republic ◽  
Drought Stress ◽  
Water Balance ◽  
Crop Rotations ◽  
Field Crop ◽  
The Czech Republic

Family Secrets and their Destructive Consequences: In My Father’s Den (Brad McGann, 2004)

2018 ◽  
Author(s):  
Alistair Fox
Keyword(s):  
New Zealand ◽  
Coming Of Age ◽  
Family Members ◽  
Historical Changes ◽  
Family Secrets ◽  
Effects On Children

This chapter analyses Brad McGann’s highly esteemed adaptation (2004) of Maurice Gee’s novel In My Father’s Den (1972) as evidence of a prevailing trend in New Zealand coming-of-age films whereby the vision of a source work is regularly updated to reflect the different values and perspectives of a later generation. In this case, the updating involves a shift of emphasis from the destructive effects on children of puritan religiosity and repressiveness to those of lack of communication among family members, combined with the preservation of unspoken, but collectively known, family secrets, reflecting historical changes that had occurred in New Zealand society since the generation of Gee (born 1931) and that of McGann (born 1964).

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