Humidity Reactions and Water Balance of Larvae of Neodiprion americanus banksianae Roh. and L. lecontei (Fitch) (Hymenoptera: Diprionidae)

1954 ◽  
Vol 86 (6) ◽  
pp. 261-274 ◽  
Author(s):  
G. W. Green
Keyword(s):  
North America ◽  
Water Balance ◽  
Evaporation Rate ◽  
Eastern North America

This paper presents the results of bioclimatic investigations of two species of diprionid sawflies, Neodiprion americanus banksianae Roh. and N. lecontei (Fitch), important defoliators of pines in eastern North America. It deals primarily with the reactions of larvae of both species to gradients of evaporation rate.

Three Water Balance Maps of Eastern North America

1960 ◽  
Vol 50 (2) ◽  
pp. 302
Author(s):  
George F. Jenks ◽  
David S. Simonett ◽  
C. W. Thornthwaite ◽  
John R. Mather ◽  
Douglas B. Carter
Keyword(s):  
North America ◽  
Water Balance ◽  
Eastern North America

Radial growth response of white oak to climate in eastern North America

2009 ◽  
Vol 39 (11) ◽  
pp. 2180-2192 ◽  
Author(s):  
David C. LeBlanc ◽  
Mark A. Terrell
Keyword(s):  
North America ◽  
Water Balance ◽  
Radial Growth ◽  
Eastern North America ◽  
Quercus Alba ◽  
Range Limit ◽  
White Oak ◽  
Climate Gradients ◽  
Site Water ◽  
Dormant Season

Predicting forest responses to climate change requires an understanding of the cause–effect relationships linking climate to tree growth. Dendroecological analyses across sites that span climate gradients provide one means of characterizing such relationships. Dendroecological analyses for white oak ( Quercus alba L.) at 149 sites spanning the species range in eastern North America identified spatially replicated growth–climate associations. Early growing season site water balance variables for the year of annual ring formation had the strongest, most spatially replicated associations with growth. There was little evidence of phenological variation of these associations related to the latitudinal temperature gradient. Most spatial variation in growth–climate associations was along an east-to-west precipitation gradient. Radial growth was most strongly correlated with site water balance at sites in the northwest quadrant of the range, characterized by continental climate and high interannual variability in precipitation. There was little evidence that dormant season temperature affects white oak growth, even at the northern range limit. Correlations with dormant season precipitation were common in the northwest part of the range, where winter soil water recharge may be more variable. Spatial replication was a useful criterion for distinguishing growth–climate correlations that reflect cause–effect relationships.

Spatial variation in oak (Quercus spp.) radial growth responses to drought stress in eastern North America

2019 ◽  
Vol 49 (8) ◽  
pp. 986-993 ◽  
Author(s):  
David C. LeBlanc ◽  
Adam M. Berland
Keyword(s):  
Climate Change ◽  
Drought Stress ◽  
North America ◽  
Water Balance ◽  
Spatial Variation ◽  
Radial Growth ◽  
Growing Season ◽  
Eastern North America ◽  
Study Region ◽  
Site Water

Dendroecology provides a means to evaluate how mature trees have responded to climate stresses in the recent past and provides one approach for projecting how existing forests will respond to future climate change. This study documented spatial variation in the strength of growth–climate associations for six oak (Quercus) species at 284 sites in eastern North America that span substantial gradients of temperature and site water balance. Radial growth of oaks was more strongly related to growing-season precipitation and the ratio of precipitation to potential evapotranspiration at sites in the western part of the study region where drought conditions occur more frequently. Growth was more strongly related to growing-season mean maximum temperature in the warmer, southern part of the study region. Growth of oaks was not strongly related to site water balance or temperature in the northeastern part of the study region. These results indicate that if climate change results in increased growing-season drought stress, this will adversely affect mature oak trees growing in the southern and western parts of eastern North America, but oaks growing in northeastern North America have more safe space for change before they will suffer reduced growth and vigor.

Three Water-Balance Maps of Eastern North America

Soil Science ◽  
1959 ◽  
Vol 87 (4) ◽  
pp. 242 ◽  
Author(s):  
C. W. THORNTHWAITE ◽  
JOHN R. MATHER ◽  
DOUGLAS B. CARTER
Keyword(s):  
North America ◽  
Water Balance ◽  
Eastern North America

The Identification and Study of Indian Shell Middens in Eastern North America: 1643–1861

1986 ◽  
Vol 6 (3) ◽  
pp. 227-243 ◽  
Author(s):  
Andrew L. Christenson
Keyword(s):  
Nineteenth Century ◽  
Civil War ◽  
North America ◽  
East Coast ◽  
Eastern North America ◽  
Shell Midden ◽  
Shell Middens ◽  
Work Done

Although the interest in shell middens in North America is often traced to reports of the discoveries in Danish kjoekkenmoeddings in the mid-nineteenth century, extensive shell midden studies were already occurring on the East Coast by that time. This article reviews selected examples of this early work done by geologists and naturalists, which served as a foundation for shell midden studies by archaeologists after the Civil War.

HAVE WE SEEN THE LARGEST EARTHQUAKES IN EASTERN NORTH AMERICA?

2018 ◽  
Author(s):  
James S. Neely ◽  
◽  
Seth Stein ◽  
Miguel Merino ◽  
John Adams
Keyword(s):  
North America ◽  
Eastern North America
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