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
[2] http://admin.indiaenvironmentportal.org.in/category/newspaper/big-news-network
[3] http://admin.indiaenvironmentportal.org.in/category/thesaurus/wildlife
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/elephant
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/africa
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/national-parks
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/uganda
[8] http://admin.indiaenvironmentportal.org.in/category/thesaurus/grasslands