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Image from page 280 of "Brigham Young University science bulletin" (1955) | by Internet Archive Book Images
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Image from page 280 of "Brigham Young University science bulletin" (1955)

Title: Brigham Young University science bulletin

Identifier: brighamyounguniv10brig

Year: 1955 (1950s)

Authors: Brigham Young University

Subjects: Biology -- Periodicals

Publisher: Provo, Utah : Brigham Young University

Contributing Library: Harvard University, Museum of Comparative Zoology, Ernst Mayr Library

Digitizing Sponsor: Harvard University, Museum of Comparative Zoology, Ernst Mayr Library



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Text Appearing Before Image:

-^ 1850 1871vv Fig. 6. Dating the Lons Mcs.i Bum: I'.nl .'I tin- wedge of a burned Douglas-fir (Mesa Verde specimi-ii No. 3066) from which the skeleton plot shown in Figure 5 was made. The cross-dating provided an outermost ring date of 1871. The single pinholes indicate decades; the double pinhole, the 1850 increment. Vegetation. The present vegetation in the Long Mesa Burn is a dense entanglement of shrubs and young trees (Fig. 8). The dead, charred snags of the former forest are generally screened by this new vegetation. The pinyon-juniper component of the stand has been increasing since the turn of the century, when the first seedlings were established (Table 6). Although the older trees are 15 to 20 feet in height, the mountain brush species continue to characterize the stand (Table 7). The shrubs with the maximum cover and greatest frequency were bitterbrush {Purshia tridentata) and Fendlera nipicola, both almost tree-like in their growth habits here, in con- trast to their small size in the climax forest. *f-


Text Appearing After Image:

Fig. 7. Dating the Long Mesa Burn; Increment core of Douglas-fir cross-dated with the Mesa Verde master chronology. The length of each vertical bar on the graph is inversely proportional to the relative width of the rmg; average width rings are not recorded. The suppression wood between the years 1874 and 1889 is atypical and reflects the effect of the fire. Micro-rings occurred in 1847, 1851, 1861, 1902, and 1904.



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