According to a new research loss of megaherbivores such as elephants and hippos could allow woody plants, non-grassy herbs and flowering plants to encroach the grasslands in African national parks.
Links:
[1] http://admin.indiaenvironmentportal.org.in/news/loss-elephants-megaherbivores-could-lead-rapid-environmental-changes-study-0
[2] http://admin.indiaenvironmentportal.org.in/category/newspaper/business-standard-new-delhi
[3] http://admin.indiaenvironmentportal.org.in/category/thesaurus/elephant
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/grasslands
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/africa
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/extinct-species
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/ecosystems
[8] http://admin.indiaenvironmentportal.org.in/category/thesaurus/forest-encroachments
[9] http://admin.indiaenvironmentportal.org.in/category/thesaurus/wildlife
[10] http://admin.indiaenvironmentportal.org.in/category/thesaurus/environment