Bibliography on the topic "Ecosystems" and student work

• Biology and Geology 3 ^or ESO. (s. f.). Retrieved April 19, 2013, from http://recursostic.educacion.es/secundaria/edad/3esobiologia/index.htm
  
• Biotope. (2020, January 30). Wikipedia, The Free Encyclopedia. Consultation date: 18:53, February 12, 2020 from  https://es.wikipedia.org/w/index.php?title=Biotopo&oldid=123185757 .
• EcosBiologia - 8.-The soil as an ecosystem. (s. f.). Retrieved May 28, 2016, from https://ecosbiologia.wikispaces.com/8.-El+suelo+como+ecosistema. 
• Aquatic ecosystem. (2017, July 25). Wikipedia, The Free Encyclopedia. Consultation date: 16:10, August 18, 2017 from https://es.wikipedia.org/w/index.php?title=Ecosistema_acu%C3%A1tico&oldid=100695077 .
  
• Biosphere Project. (s. f.). Retrieved April 2, 2016, from http://recursostic.educacion.es/ciencias/biosfera/web/alumno/4ESO/Dinamica/contenidos.htm
• (s. f.). Retrieved March 31, 2016, as ofhttp://e-ducativa.catedu.es/44700165/aula/archivos/repositorio/500/570/html/Unidad05/index.html