▁in ▁a ▁study ▁done ▁by ▁P ell ▁and ▁Jones , ▁looking ▁at ▁bird ▁use ▁of ▁these ▁cor rid ors ▁in ▁Australia , ▁that ▁many ▁birds ▁did , ▁in ▁fact , ▁use ▁these ▁cor rid ors ▁to ▁travel ▁from ▁one ▁side ▁of ▁forest ▁to ▁the ▁other ▁and ▁although ▁they ▁did ▁not ▁spend ▁much ▁time ▁in ▁the ▁cor rid or ▁specifically , ▁they ▁did ▁commonly ▁use ▁them . ▁R ip arian ▁cor rid ors ▁are ▁very ▁similar ▁to ▁over pass es ▁they ▁are ▁just ▁on ▁flat ▁land ▁and ▁not ▁on ▁brid ges , ▁however , ▁they ▁also ▁work ▁as ▁connect ive ▁" brid ges " ▁between ▁fragment ed ▁pieces ▁of ▁forest . ▁One ▁study ▁done ▁connected ▁the ▁cor rid ors ▁with ▁bird ▁habitat ▁and ▁use ▁for ▁seed ▁dispers al . ▁The ▁conclus ions ▁of ▁this ▁study ▁showed ▁that ▁some ▁species ▁of ▁birds ▁are ▁highly ▁dependent ▁on ▁these ▁cor rid ors ▁as ▁connections ▁between ▁forest , ▁as ▁flying ▁across ▁the ▁open ▁land ▁is ▁not ▁ideal ▁for ▁many ▁species . ▁Over all ▁both ▁of ▁these ▁studies ▁agree ▁that ▁some ▁sort ▁of ▁connect ivity ▁needs ▁to ▁be ▁established ▁between ▁fragments ▁in ▁order ▁to ▁keep ▁the ▁forest ▁e cos ystem ▁in ▁the ▁best ▁health ▁possible ▁and ▁that ▁they ▁have ▁in ▁fact ▁been ▁very ▁effective . ▁ ▁Marine ▁ ▁Def a un ation ▁in ▁the ▁ocean ▁has ▁occurred ▁later ▁and ▁less ▁intens ely ▁than ▁on ▁land . ▁A ▁relatively ▁small ▁number ▁of ▁marine ▁species ▁have ▁been ▁driven ▁to ▁ext inction . ▁However , ▁many ▁species ▁have ▁under g one ▁local