Survival of Juvenile Wood Ducks in a Northern Greentree Impoundment

1984 ◽  
Vol 48 (4) ◽  
pp. 1364 ◽  
Author(s):  
G. M. Haramis ◽  
D. Q. Thompson
Keyword(s):  
Juvenile Wood ◽  
Wood Ducks

Summer Food Habits of Juvenile Wood Ducks in East Tennessee

1971 ◽  
Vol 35 (2) ◽  
pp. 286 ◽  
Author(s):  
Grady E. Hocutt ◽  
Ralph W. Dimmick
Keyword(s):  
Food Habits ◽  
Juvenile Wood ◽  
Wood Ducks ◽  
East Tennessee

Ishi and the Wood Ducks, Part 2, or Ishi, the “Urban” Indian1

2018 ◽  
Vol 19 (4) ◽  
pp. 305-319 ◽  
Author(s):  
Norman K. Denzin
Keyword(s):  
North America ◽  
Life And Death ◽  
Wood Ducks ◽  
Urban Indian

“Ishi and the Wood Ducks, Part 2, or Ishi, The ‘Urban’” Indian” is the first play in a five-play cycle, which dramatizes the events surrounding the life and death of a tribal man named Ishi who was immortalized in Theodora Kroeber’s (1961/1989) best-selling Ishi in Two Worlds: A Biography of the Last Wild Indian in North America.

Distribution of juvenile wood in two stems of Larixlaricina

1986 ◽  
Vol 16 (5) ◽  
pp. 1041-1049 ◽  
Author(s):  
K. C. Yang ◽  
C. A. Benson ◽  
J. K. Wong
Keyword(s):  
Juvenile Wood ◽  
Growth Ring ◽  
Ring Width ◽  
Tree Level ◽  
Growth Rings ◽  
Vertical Variation ◽  
Strong Negative Correlation ◽  
Ring Number ◽  
Tracheid Length ◽  
Growth Ring Width

The distribution and vertical variation of juvenile wood was studied in an 81-year-old dominant tree and an 83-year-old suppressed tree of Larixlaricina (Du Roi) K. Koch. Two criteria, growth ring width and tracheid length, were used to demarcate the boundary of juvenile wood. The width of juvenile wood, expressed in centimetres and the number of growth rings, decreased noticeably from the base to the top of the tree. The volume of juvenile wood decreased in a similar pattern. These decreasing trends had a strong negative correlation with the year of formation of cambial initials at a given tree level. The length of these cambial initials decreased with increasing age of formation of the cambial initials. In the juvenile wood zone, there was a positive linear regression between the growth ring number (age) and the tracheid length. The slopes of these regression lines at various tree levels increased as the age of the year of formation of the cambial initials increased. At a given tree level, the length of tracheids increased from the pith to a more uniform length near the bark. However, the number of years needed to attain a more uniform tracheid length decreased from the base to the top of the tree. These relationships suggest that the formation of juvenile wood is related to the year of formation of the cambial initials. Consequently, the juvenile wood is conical in shape, tapering towards the tree top.

Sorption and thermodynamic properties of juvenile Pinus sylvestris L. wood after 103 years of submersion

Holzforschung ◽  
2008 ◽  
Vol 62 (6) ◽  
Author(s):  
Luis García Esteban ◽  
Paloma de Palacios ◽  
Francisco García Fernández ◽  
Antonio Guindeo ◽  
Marta Conde ◽  
...  
Keyword(s):  
Thermodynamic Properties ◽  
Pinus Sylvestris ◽  
Integration Method ◽  
Juvenile Wood ◽  
Crystallinity Index ◽  
Isosteric Heat ◽  
Chemical Modifications ◽  
Clapeyron Equation ◽  
X Ray ◽  
Hemicellulose Degradation

Abstract The hygroscopicity and thermodynamic properties of juvenile Pinus sylvestris L. wood taken from the submerged piles of a bridge built in 1903 over the Jiloca River, in Spain, were compared with the corresponding values of juvenile wood of the same species from recently cut trees. The 35°C and 50°C isotherms were plotted and subsequently fitted using the Guggenheim-Anderson-Boer-Dent method, and the isosteric heat of sorption was obtained through the integration method of the Clausius-Clapeyron equation. The isotherms were compared by means of the hysteresis coefficients. Infrared spectra were recorded to study the chemical modifications, and the crystal structure of the cellulose was studied by X-ray diffractograms. The submersion in water resulted in hemicellulose degradation and a decrease in the crystallinity index and the crystallite length, accompanied by a corresponding increase in the proportion of amorphous zones. Owing to this, the equilibrium moisture contents of the water logged wood are higher than in the recent wood, both in adsorption and in desorption. In terms of the thermodynamic properties, the bond energy is higher in the recent wood than in the water logged wood.

Characteristics and Consequences of Nest-Site Fidelity in Wood Ducks

The Auk ◽  
1992 ◽  
Vol 109 (4) ◽  
pp. 812-818 ◽  
Author(s):  
Gary R. Hepp ◽  
Robert A. Kennamer
Keyword(s):  
Site Fidelity ◽  
Nest Site ◽  
Nest Site Fidelity ◽  
Wood Ducks

Dump Nesting and Its Effect on Production in Wood Ducks

1969 ◽  
Vol 33 (2) ◽  
pp. 284 ◽  
Author(s):  
Thomas E. Morse ◽  
Howard M. Wight
Keyword(s):  
Wood Ducks

Habitat Use by Nonbreeding Wood Ducks in the Coastal Plain and Rice Prairie Region of Texas

2002 ◽  
Vol 47 (3) ◽  
pp. 486 ◽  
Author(s):  
James T. Anderson ◽  
Thomas C. Tacha
Keyword(s):  
Habitat Use ◽  
Coastal Plain ◽  
Wood Ducks

Incubation as a Reproductive Cost in Female Wood Ducks

The Auk ◽  
1990 ◽  
Vol 107 (4) ◽  
pp. 756-764 ◽  
Author(s):  
Gary R. Hepp ◽  
Robert A. Kennamer
Keyword(s):  
Reproductive Cost ◽  
Wood Ducks

scholarly journals The significance of compression wood in restoration of the leader in Pinus sihestris L. damaged by moose (Alces alces). II. Structure of growth rings in regenerating stems in relation to juvenile wood formation

2015 ◽  
Vol 40 (2) ◽  
pp. 315-340 ◽  
Author(s):  
B. A. Molski
Keyword(s):  
Tree Ring ◽  
Tree Rings ◽  
Compression Wood ◽  
Juvenile Wood ◽  
Alces Alces ◽  
Wood Formation ◽  
Ring Structure ◽  
Growth Rings ◽  
Late Wood ◽  
Wood Compression

The corewood of pine ds very prone to compression wood formation, this changing the whole pattern of the tree ring structure and the siz.es of early and late wood. Compression wood always increases the formation of late wood at the expense of early wood. Tree rings with compression wood are generally wider than those without it, but there occur also tree rings wihout compression wood wider than those in which it is present, formed in the same year and in the same tree.

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