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The location of the submontane
altitudinal zone
in the tropical
and seasonal
rainforest
ecosystems
depends on latitude.
In the Atlantic
Rainforest
Southeast Reserves
( > 24° ) it is located between 30 and 400 meters above sea level.
The vegetation of this zone
is called submontane rainforest ( floresta submontana).
Submontane tropical rainforests thrive on stable unflooded (hydromorph) and relatively deep
soils, which is why
biodiversity
is very expressive in this zone.
The trees can reach heights up to 35 m and the lower arboreal stratum contains several
smaller palm tree species such as Astrocaryum aculeatissimum (brejaúba) or Euterpe edulis (palmito juçara).
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The overlapping pattern brought about by the arrangement of the crowns of the trees
making up the canopy at different levels, as a result of the steep
topography,
enables sunlight to shine through. This factor, together with the humidity brings about
the growth and maintenance of very rich and abundant epiphytic communities which distinguishes
the submontane and montane
rainforests from the lowland
ones.
Some popular trees of the submontane zone are the large fig tree
figueira-da-folha-miúda (Ficus organensis), the guanandi
(Calophyllum brasiliense) which is used for building canoes or the magnificent yellow flowering
ipê-amarelo (Tabebuia umbellata). Further typical species of the submontane altitudinal zone divided
by layers ( stratums) are:
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| Upper arboreal stratum (canopy): |
Ocotea catharinensis (canela-preta),
Sloanea guianensis (laranjeira-do-mato), Alchornea triplinervia (tapiá),
Schizolobium parahyba (guapuruvu), Nectandra rigida (canelagaruva), Aspidosperma olivaceum
(peroba-vermelha) und Virola oleifera (bocuva). |
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| Lower arboreal stratum: |
Bathysa meridionalis (macuqueiro),
Euterpe edulis (palmito), Mollinedia spp (pimenteira), Psychotria suterella
(grandiúva-d’anta, caféd’anta), Geonoma gamiova (palha) und Clusia criuva (mangue-do-mato). |
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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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