▁climate ▁but ▁by ▁a ▁shall ow ▁layer ▁of ▁cl ay . ▁This ▁imper vious ▁hard pan ▁cl ay ▁layer ▁restrict s ▁the ▁growth ▁of ▁roots ▁and ▁magn ifies ▁both ▁season al ▁flo oding ▁and ▁season al ▁dr ought . ▁These ▁factors ▁combined ▁with ▁regular ▁expos ure ▁to ▁the ▁un inter rupted ▁tropical ▁sun ▁make ▁the ▁sav ann as ▁a ▁host ile ▁environment ▁for ▁most ▁plants ▁and ▁animals . ▁ ▁Although ▁the ▁ed aph ic ▁layer ▁is ▁distinct , ▁the ▁Ari po ▁sav ann as ▁is ▁e colog ically ▁similar ▁to ▁other ▁tropical ▁hyp ers es onal ▁sav ann as , ▁such ▁as ▁those ▁found ▁within ▁Gran ▁Sab ana ▁in ▁Venezuela ▁or ▁C err ado ▁in ▁Brazil . ▁In ▁fact , ▁some ▁of ▁the ▁dominant ▁grass land ▁species ▁are ▁shared ▁between ▁all ▁three ▁sav ann as . ▁ ▁The ▁sav ann as ▁are ▁home ▁to ▁many ▁rare ▁plants , ▁including ▁at ▁least ▁two ▁en demic ▁species : ▁Rh yn chos por a ▁a ri po ensis ▁and ▁X y ris ▁gr is eb ach ii . ▁They ▁also ▁provides ▁a ▁habitat ▁for ▁several ▁rare ▁and ▁threatened ▁animals . ▁In ▁the ▁past , ▁the ▁area ▁has ▁been ▁exposed ▁to ▁considerable ▁disturb ance ▁due ▁to ▁human ▁activity , ▁but ▁the ▁sav ann as ▁along ▁with ▁the ▁associated ▁Marsh ▁and ▁Pal m ▁for ests ▁are ▁now ▁protected ▁within ▁the ▁ 1 , 7 8 8 ▁hect are ▁Ari po ▁Sav ann as ▁Environment ally ▁S ens itive ▁Area . ▁ ▁References ▁ ▁Category : T rop ical