The Use of Natural and Modified Pinyon Pine-Juniper Woodlands by Deer and Elk

1977 ◽  
Vol 41 (3) ◽  
pp. 543 ◽  
Author(s):  
Henry L. Short ◽  
Wain Evans ◽  
Erwin L. Boeker
Keyword(s):  
Pinyon Pine

scholarly journals Δ14C PEAKS APPEARING IN EARLYWOOD AND LATEWOOD TREE RINGS (AD 770–780) IN NORTHEASTERN ARIZONA

Radiocarbon ◽  
2020 ◽  
pp. 1-6
Author(s):  
J H Park ◽  
J Southon ◽  
JW Seo ◽  
P P Creasman ◽  
W Hong ◽  
...  
Keyword(s):  
Tree Rings ◽  
High Latitude ◽  
Pinus Edulis ◽  
Lateral Transfer ◽  
Late Winter ◽  
National Monument ◽  
Small Rise ◽  
Pinyon Pine

ABSTRACT The AD 775 peak in Δ14C (henceforth, M12) was first measured by Miyake et al. and has since been confirmed globally. Here we present earlywood and latewood Δ14C values from tree rings of pinyon pine (Pinus edulis) from Mummy Cave, Canyon de Chelly National Monument, Chinle, Arizona, USA, for the period AD 770–780. These data reconfirm the timing of M12 and show a small rise in Δ14C in AD 774 latewood. Allowing for the delay in lateral transfer of radiocarbon produced at high latitude, this suggests that 14C peak production occurred in late winter or spring of AD 774. Additionally, Δ14C decreased slightly in the earlywood of AD 775 and increased in the latewood of AD 775 to a higher level than that observed in AD 774.

scholarly journals The Atmospheric δ13C Record as Derived from 56 Pinyon Trees at 14 Sites in the Southwestern United States

Radiocarbon ◽  
1989 ◽  
Vol 31 (03) ◽  
pp. 469-474 ◽  
Author(s):  
S W Leavitt ◽  
Austin Long
Keyword(s):  
High Frequency ◽  
Ice Core ◽  
Ring Width ◽  
Ice Cores ◽  
The Other ◽  
Core Data ◽  
Single Tree ◽  
Pinyon Pine ◽  
The Individual ◽  
First Time

We have developed a master δ13C chronology from 14 pinyon pine sites in 6 states of the southwestern U S. Two of the individual isotopic chronologies, reported here for the first time, and 10 of those previously reported (Leavitt & Long, 1986; 1988) are from sites where cores from 4 trees were pooled prior to analysis, and the other 2 are merged from groups of 4 single-tree chronologies (sites) developed in an earlier phase of research (Leavitt & Long, 1985). Regressions of first differences of ring-width indices and δ13C values from each site were used to “correct” individual δ13C chronologies for climate effects which appear primarily related to high-frequency δ13C fluctuations, many of which are common among sites. These climate-corrected chronologies were normalized as deviations from their respective 1800–1849 δ13C means, and these normalized chronologies were averaged into the master. The overall δ13C drop from 1600 to the present is ca 1.2–1.4, consistent with recent ice-core data showing a drop of 1.14 ± 0.15% from 1740 to present (Friedli et al, 1986). However, the δ13C decline in the late 19th and early 20th centuries is greater in the pinyon chronology than that of the ice cores, thus supporting a greater biospheric CO2 input to the atmosphere than that indicated in the ice-core data.

scholarly journals Widespread mortality and defoliation of pinyon pine in central Nevada mountains

2019 ◽  
Vol 100 (2) ◽  
pp. e01507 ◽  
Author(s):  
Samuel W. Flake ◽  
Peter J. Weisberg
Keyword(s):  
Pinyon Pine

A study of the effects of oak defoliation on understory plants

1984 ◽  
Vol 102 (1) ◽  
pp. 247-249
Author(s):  
A. Haile
Keyword(s):  
Ponderosa Pine ◽  
The Other ◽  
Forage Production ◽  
Western Colorado ◽  
Herbage Yield ◽  
Pinyon Pine ◽  
Quercus Gambelii ◽  
Gambel Oak ◽  
Great Portion ◽  
Grazing Capacity

A great portion of south-western Colorado and the other western states of the U.S.A. is covered with gambel oak (Quercus gambelii). Gambel oak was determined by Brown (1958) to be an important component of the mountain brush type in Colorado. It occurs in pure stands as well as in association with pinyon pine, juniper, ponderosa pine, aspen, and spruce on several million hectares. Ranges covered with gambel oak have relatively low grazing capacity and low availability of the understory vegetation for grazing animals. Jeffries (1965), studying the effect of gambel oak on range forage production, indicated that herbage yield under the oak canopy was less than that of grasses growing in the open. The restriction in forage growth under the oak is attributed to the shading effect rather than the competition for moisture. Therefore, removal of gambel oak would be likely to improve the ranges.

The Biological Model for Paleoclimatic Interpretation of Mesa Verde Tree-Ring Series

1965 ◽  
Vol 19 ◽  
pp. 101-121 ◽  
Author(s):  
Harold C. Fritts ◽  
David G. Smith ◽  
Marvin A. Stokes
Keyword(s):  
Tree Ring ◽  
High Temperatures ◽  
Ring Width ◽  
Douglas Fir ◽  
Biological Model ◽  
Tree Ring Chronology ◽  
Mesa Verde ◽  
Pinyon Pine ◽  
Utah Juniper ◽  
Low Precipitation

AbstractRing-width chronologies in Douglas-fir, pinyon pine, and Utah juniper show some distinctly different characteristics and exhibit highly predictable relationships with variations in climate. Narrow rings in Douglas-fir are largely the result of low precipitation and high temperatures of the previous June, low precipitation during August through February, low precipitation and low temperatures during March through May, and low precipitation and high temperatures of the current June. Narrow rings in pinyon pine are largely a function of low precipitation from October through May, but high July temperatures near the end of the growing season may also exert an influence. Narrow rings in Utah juniper are the result of low precipitation and high temperatures during the previous October through November, low precipitation during December through February, and low precipitation and high temperatures during March through May. A biological model for these relationships is proposed. The tree-ring chronology from A.D. 1273 through 1285 exhibits a clearly defined drought which exceeds in length and intensity any dry period occurring since A.D. 1673. A comparison of the chronologies from species which are influenced differently by summer precipitation indicates that during this period both summers and winters must have been dry. However, the A.D. 1273-1285 drought at Mesa Verde was surpassed by six other droughts of greater intensity during the period A.D. 500–1300. The A.D. 1273–1285 drought may be only one of several factors in a chain of events which led to the decline of prehistoric population in the Mesa Verde.

Population structure of Pinus nelsoni Shaw, an endemic pinyon pine in Tamaulipas, Mexico

2002 ◽  
Vol 165 (1-3) ◽  
pp. 193-203 ◽  
Author(s):  
Humberto Suzán-Azpiri ◽  
Gerardo Sánchez-Rámos ◽  
José Guadalupe Martı́nez-Avalos ◽  
Sandro Villa-Melgarejo ◽  
Miguel Franco
Keyword(s):  
Population Structure ◽  
Pinyon Pine

Genetic Structure Among Pinyon Pine Beetle Populations (Scolytinae: Ips confusus)

2003 ◽  
Vol 32 (5) ◽  
pp. 1262-1270 ◽  
Author(s):  
Anthony I. Cognato ◽  
April Dawn Harlin ◽  
Marc L. Fisher
Keyword(s):  
Genetic Structure ◽  
Ips Confusus ◽  
Pine Beetle ◽  
Pinyon Pine

Discrimination among pinyon pine trees by Clark's Nutcrackers: effects of cone crop size and cone characters

Oecologia ◽  
1991 ◽  
Vol 86 (3) ◽  
pp. 402-407 ◽  
Author(s):  
Kerry M. Christensen ◽  
Thomas G. Whitham ◽  
Russell P. Balda
Keyword(s):  
Crop Size ◽  
Pine Trees ◽  
Clark’S Nutcrackers ◽  
Pinyon Pine ◽  
Clark's Nutcrackers
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