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The location of the montane
altitudinal zone
in the tropical rainforest
ecosystem
depends on latitude. In the
Atlantic
Rainforest
Southeast Reserves
( > 24° ) it is located between 400 and 1000 m above sea level. The vegetation of this altitudinal zone
is called montane tropical rainforest (floresta ombrófila densa montana).
Montane tropical rainforests thrive on loamy clay
soils
(lithosols) which compared to the
submontane
belt are shallower and contain less organic material.
Due to the higher elevations above sea level, temperatures of the montane zone are lower than the
the ones of the submontane (ø 15°C) and it rains more frequently (ø 2.500 mm/year).
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Therefore, the trees of the montane zone are lower ( < 25 m) and thinner than the ones of the submontane zone.
Below 800 m on the inland side of the coastal mountain ranges, the montane rainforest often merges into
Araucaria forest (floresta ombrófila mista).
Characteristic species of the montane altitudinal zone divided by layers (stratums) are: |
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| Upper arboreal stratum (canopy): |
estopeira (Cariniana estrellensis), bocuva (Virola bicuhyba),
maçaranduba (Manilkara subsericea), guapeva (Pouteria torta)
figueira (Ficus spp.), embiruçu (Pseudobombas grandiflorum), pau-sangue (Pterocarpus rohrii),
cedro (Cedrela odorato), cajarana (Cabralea canjerana), caovi (Pseudopiptadenia warmingii),
pau d'óleo (Copaifera trapezifolia), canela (Ocotea spp., Nectandra spp.), guamirim e cambuis
(Myrcia spp., Eugenia spp.). |
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| Lower arboreal stratum: |
macuqueiro (Bathysa meridionalis), flor-de-cera (Psychotria nuda),
pasto-de-anta (Psycotria sessilis), aguaís-da-serra (Chrysophyllum spp.)
bréjauba (Atstocaryum aculeatissimum) e palmito-juaara (Euterpe Edulis). |
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| Brushy stratum: |
rubiaceae (Psychotria spp., Rudgea spp., Faramea spp.),
pipe (Piperaceae) e acanthaceae (Justicia spp., Aphelandra spp.), xaxins-de-espino (Cyathea spp.). |
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| Inferior stratum - herbaceous: |
acanthaceae, rubiaceae, araceae, marantaceae e piperaceae. |
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Source: Carlos Renato Fernandes (Floresta Atlântica)
Nicia Wendel de Magalhães (Descubra o Lagamar) |
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