Tyler Christopher is leaving 'General Hospital' â Nikolas has been recast at 'GH' with Nick Stabile. Get the details. Tyler Christopher is leaving 'General Hospital' â Nikolas has been recast at 'GH' with Nick Stabile.
Definition of BIOREGION. : a region whose limits are naturally defined by topographic and biological features (as mountain ranges and ecosystems).â bioÂ·reÂ·gionÂ·al \ËbÄ«-Å-ËrÄj-nÉl, -ËrÄ-jÉ-nÉl\ adjective.ADVERTISEMENT. a region whose limits are naturally defined by topographic and biological features (as mountain ranges and ecosystems).
1 The biosphere is the global ecosystem, the sum of all of the planetâs ecosystems. 2  The biosphere includes the entire portion of Earth inhabited by life, ranging from the atmosphere to a height of several kilometers to the oceans and water bearing rocks to a depth of several kilometers.