Grassland invaders threaten Dibru-Saikhowa National Park, home to feral horses
A new study reveals that native and invasive plant species are altering the riverine ecosystem of Assam's Dibru-Saikhowa National Park (DSNP), the sole habitat for feral horses in India. Native "grassland invaders" like Bombax ceiba and Lagerstroemia speciosa, along with invasive species such as Chromolaena odorata and Mikania micrantha, are stifling grasslands. The study, "Grasslands in Flux," analyzing LULC changes from 1999 to 2024, found a significant decline in grasslands and an increase in shrubland and degraded forest. This degradation threatens grassland-obligate faunal species like the Bengal florican, hog deer, and swamp grass babbler, necessitating targeted recovery projects, invasive species control, and improved surveillance.
Key Points
- Dibru-Saikhowa National Park (DSNP) in Assam, India, is facing threats from native and invasive plant species.
- The park is the only habitat for feral horses in India.
- The study "Grasslands in Flux" revealed a significant decline in grasslands and an increase in shrubland and degraded forest between 1999 and 2024.
- This ecological change threatens grassland-obligate faunal species, many of which are globally threatened.
- Recommendations include targeted grassland recovery, invasive species control, and enhanced conservation efforts.
Exam Facts
- Dibru-Saikhowa National Park (DSNP) is located in eastern Assam and is the only habitat for feral horses in India.
- Native 'grassland invaders' include Bombax ceiba (Simalu) and Lagerstroemia speciosa (Ajar).
- Invasive species include Chromolaena odorata, Ageratum conyzoides, Parthenium hysterophorous, and Mikania micrantha.
- Threatened species mentioned: Bengal florican (Houbaropsis bengalensis), hog deer (Axis porcinus), and swamp grass babbler (Prinia cinerascens).
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