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Contributed by Museum of Vertebrate Zoology, University of California, Berkeley.
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Transcription
Pearson - 1994 2
much else. The grassy clearing between the two marked
clumps is still open, the big rosa mosqueta bush still
vigorous. One can still see the dead remains of rosa
bushes in the dense bamboo nearby. These were surely
choked out by the bamboo at least 10 or 15 years ago.
The carriage trails that have been kept open are now
tunnels through the bamboo. The bamboo hangs over
them, but has not invaded the right-of-way Even those
trails abandoned have not been invaded by bamboo.
Around the clearing, several young dombeyi have
escaped above the bamboo.
Stopped at Arroyo Casa de Piedras to clean the
car. Pampa Quemada (behind the Centro Atomico) is
recovering rapidly from last year's fire. There was
more bamboo in there than we had realized; it has new
green culms and slender yearling culms, but seems to
have been heavily grazed.
November 30-- Clear, sunny, warm. Drove to La Veranada and
visited the two marked bamboo clumps (E2 and E3). The
nire at our study area was not at all out yet, but the
lenga west of the road was fresh green. Lots of
somewhat old tuco mounds, and saw no tuco earth cores,
but tucos are surely present. Lots of dandelions in
bloom. Saw few birds. The Parkguard house at the
horse pasture seemed to be occupied, but we couldnt
rouse anyone.
Continuing thoughts about the nire forest at La
Veranada. Almost all the trees are clumps, which
supports the notion that it burned and root-sprouted
40 or 50 years ago. Futhermore, almost all the nire
clumps are elevated a foot or two above the ground
level between clumps, and many if not most are closely
associated with bamboo. And many have tuco diggings
around the base. Perhaps the post-fire bamboo
protected the young nire sprouts? Or the charred nire
trunks protected the bamboo?
Picnicked at the study area; balmy, no wind. Nice
pair of wigeon at the marsh/meadow just north of the
study area. Then drove down the hill to the meadow at
the north end of Lago Guillermo. Here again the nire
clumps are elevated, frequently associated with bamoo
or with Berberis. And tucos may be present at any
combination including dead nire and Berberis.
Did not pass any snow all day.
October 31- Bariloche. Morning overcast, temp 52. Max-min