Complex sentence: Tourism has been negatively affected at the site as a consequence of the 2009 Malagasy political crisis; management of the site has also been hampered by political instability and reduced revenues since 2009.
Split into simpler sentences: Tourism has been negatively affected at the site as a consequence of the 2009 Malagasy political crisis. Management of the site has also been negatively affected by political instability and reduced revenues since 2009.