WSP00036

• File Number: 8200.750
• Description: San Juan River General
• State: CO
• Basin: San Juan/Dolores
• Water Division: 7
• Date: 3/1/1975
• Author: BOR
• Title: San Juan Ecology Project - Interim Progress Report - March 1975
• Water Supply Pro - Doc Type: Report/Study

Table 2. Maximum leaf length of Festuea thurberi.
PLOT 1971 1972 1973
2900 M:-:-South 57.3 em. 51.1 cm. 63.1 em.
3200 M. - South 55.0 em. 57.1 cm. 56.6 em.
3200 M. North 49.7 em. 54.6 em. 55.9 em.
3350 M. - South 43.0 em. 47.0 em. 45.9 em.
3350 M. - North 39.7 CDl. 55.3 cm. 53.5 em.

Table 3. Maximum

PLOT
3200 M:-=-South

3200 M. - North

3350 M. - South

3350 M. - North

leaf length

1971
46.4 em.

50.7 em.

39.0 em.

38.4 em.

1972
46.4 em.
56.6 em.
33.3 em.
43.0 cm.

of Swertia radiata.

Table 4. Maximum inflorescence
Achillea lanalosa.
PLOT 1971
2900 M:-=-South 43~m.
2900 M. - North
3200 M. - South
3200 M. - North
3350 M. South
3350 M. North

height of'

1972
38.3 em.

46.8
44.2
39.7
36.5

42.1
37.4
23.5
20.7

em.

em.

em.

em.

em.

em.

em.

em.

Table 5.

Correlation between year days
phenological event took place
of 0% snowcover on. the plot.

PLANT AND PHENOLOGICAL EVENT
Festuea thurberi - maximum height

Helenlum hoopesii - maximum inflorescence
height

Mertensia fusiformis - full bloom~~

Thlaspi alpestre - full bloom~*

* Degrees of freedom are at least 74.

1973
55.9 em.
60.4 em.
40.1 em.
50.9 em.

1973
60.9 em.

46.5 em.

41. 7 em.

37.0 em.

36.3 em.

33.7 em.

on which
and year

t
ii
!
~
a _
day ~
"

.
CORRELATION':
COEFFICIENT.
0.876

0.810
0.903
0.928

** Full bloom is defined 8S 50% of the inflorescence
is in flower.

1M
"
~:J
.- "
! :,1)
- ;0
'-
"
-'
1~
- "
0
.0

- --

9 14 I~ 24 29
liay

13 18 2328
June

1'tme in Day~

318 23
Jul)'

Figure 1. Plant height in Festuca thurberi at 2900
meters, south aspect.

'00

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.,/- -
;'....- - -.;'
". . /
". .,.""
.;' /
"'. ,
./ /
,. ,.-
'" ../
/ "
,. ,.-
/ .",,'
" .,
'" ",./'
,.
,.

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'-..,~;.e'

,
22 27
_M~y

II 16 21 n.
JUIlC

Figure 3.

I

1971_._._.
1~7?___
1973_

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11 16 21 n
July

,
15 21'1
AU)1ust

I

"

Ttmclnnay..

I

Plant height in Festuca thurberi at 3200
meters, north aspect.

I

,....-;.:-......
, ~
/--
"'--
,-
/.,
//'?
/ i
-- .
I
I

'"
"
- "
.!:
- "
1
" so
.~ "
.
~ "

/'
/
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"

., "
0 "
O'
-- lO

o
"

~f' I

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1971_._._
1972---
1973-

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11 16 21 26 \I 1621 26 31 S 10
rune July August

TtmetnDays

.Figure 4. Plant height in Festuca thurberi at ~~~O
meters, south aspect

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9

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