Benthic Macroinvertebrates of Temperate, Sub-Antarctic Streams: The Effects of Altitudinal Zoning and Temperature on the Phenology of Aquatic Insects Associated to the Robalo River, Navarino Island (55°S), Chile Page: 43
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lichens
(eropegco OSP)
ggg. -Alpine tundra (High Andean) Neuropg sp
cushion plants
o(Blax uermitera) 7 Robalo River
- Headwaters
4 1600 Krumho
to(N. afrtlactcca)
ReaoRverq~e n
Figa ga alng sit (Ne ptouh thR bso)
aliuia rdeticldstecaatrsi Dcitatu types o h aeHr rgo.Fo h
LAA
e L1 Miued forest
E 0 uesn acncd deciduous l i -
(N. betufelcies aod N. umiOo) a
sEvergreen forest r
BEAGLElCHANNEL ier
O-y Rvbalo River
Mouth
d Perrfmianeaot ubNamp.ing sit ROBALO MOUNTAIN
0 15
0
Distance (kin)
Fig. 7. Altitudinal gradient and sampling sites through the R6balo river watershed. This
altitudinal gradient includes the characteristic habitat types of the Cape Horn region. From the
shoreline upwards these habitats are: evergreen forests dominated by Nothofagus betuloides;
mixed evergreen-deciduous forests dominated by N. betuloides and N. pumilio; deciduous forests
dominated by N. pumilio and N. antarctica; alpine tundra dominated at lower levels by cushion
plants, e.g., Bolax gummifera; and at upper levels by lichens such as Neuropogon sp. Fig.
modified from (Rozzi et al. 2010). Sampling sites are represented with roman numerals I - V
and range from 120- 586 m.a.s.l.Max = 17.0'C Min=-O_05 C
501
Max = 10.0C ; Min = 0.08C
Nov Dec Jan Feb Mar Apr May Jun Jul Aug Sep Oct
2010
MonthNov Dec Jan
Fig. 8. Total Cumulative Degree-Days (CDD) obtained for a period of 14 months from the
headwaters to the mouth (sites II-V) of the altitudinal gradient of the R6balo River watershed.43
2200 120 masI.
* 240masI
2000 ,386 masI
488 ma sI1800
1600
1400
1200
1000
800
600
400
200Mouth
Headwater
Headwater
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Contador Mejías, Tamara Andrea. Benthic Macroinvertebrates of Temperate, Sub-Antarctic Streams: The Effects of Altitudinal Zoning and Temperature on the Phenology of Aquatic Insects Associated to the Robalo River, Navarino Island (55°S), Chile, dissertation, December 2011; Denton, Texas. (https://digital.library.unt.edu/ark:/67531/metadc103303/m1/57/: accessed April 24, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; .