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These species have added to the adjustments within the grassland-dominated DSNP panorama, largely attributed to the recurring Brahmaputra River floods and growing anthropogenic pressures from forest villages positioned inside its boundaries, the research stated.
The native “grassland invaders” are Bombax ceiba and Lagerstroemia speciosa, flowering timber referred to as Simalu and Ajar in Assamese. Their influence on the native vegetation has been as worrying as that of the invasive species, which embrace shrubs Chromolaena odorata and Ageratum conyzoides, herb Parthenium hysterophorous and climber Mikania micrantha.
The research titled Grasslands in Flux, analysing the land use and land cowl (LULC) adjustments in Dibru-Saikhowa from its designation as a nationwide park in 1999 via 2024, was revealed within the newest problem of Earth, a global, peer-reviewed journal on earth science.
The authors of the research are Imon Abedin, Sanjib Baruah, Pralip Kumar Narzary, and Hilloljyoti Singha from Bodoland University, Tanoy Mukherjee from Zoological Survey of India, Shantanu Kundu from South Korea’s Pukyong National University, and Joynal Abedin from Women’s College, Tinsukia.
Native and invasive plant species are altering the riverine ecosystem of jap Assam’s Dibru-Saikhowa National Park, the one habitat of feral horses in India. | Photo Credit: Special association
The researchers used distant sensing and geographic info methods to analyse the LULC adjustments in DSNP, an island-like formation between the Brahmaputra to the north and the Dibru River to the south.
According to their research, grasslands lined 28.78% of the 425 sq. km DSNP in 2000, adopted by semi-evergreen forests (25.58%). By 2013, shrubland grew to become essentially the most outstanding class (81.31 sq. km), and degraded forest expanded to 75.56 sq. km.
“During this era, substantial areas of grassland (29.94 sq. km), degraded forest (10.87 sq. km), semi-evergreen forest (12.33 sq. km), and naked land (10.50 sq. km) had been transformed to shrubland. In 2024, degraded forest additional elevated, protecting 80.52 sq. km (23.47%),” the research stated.
This change was the result of the conversion of 11.46 sq. km of shrubland and 27.48 sq. km of semi-evergreen forest into degraded forest, indicating a considerable and constant decline in grassland, the research famous.
Forest degradation, even with out a lower in forest space, can result in lack of biodiversity, threaten the survival of native fauna, and scale back carbon storage, doubtlessly intensifying local weather change.
Grassland restoration sought
Dibru-Saikhowa, straddling the Dibrugarh and Tinsukia districts, was named after the Dibru Reserve Forest and Saikhowa Reserve Forest that had been amalgamated to create a wildlife sanctuary in 1995. UNESCO declared the world a Biosphere Reserve in 1997, two years earlier than it grew to become a nationwide park.
The research acknowledged that the adjustments within the “pure construction and performance” of the DSNP panorama pose a severe risk to the survival of grassland-obligate faunal species, lots of that are already globally threatened on account of ongoing habitat loss.
Native and invasive plant species are altering the riverine ecosystem of jap Assam’s Dibru-Saikhowa National Park, the one habitat of feral horses in India. | Photo Credit: Special association
“The concern is heightened by the truth that quite a few species are endemic to the grasslands discovered within the floodplains of this area. Notable species that are quickly reducing embrace the Bengal florican (Houbaropsis bengalensis), hog deer (Axis porcinus), and swamp grass babbler (Prinia cinerascens),” the research stated.
The nationwide park can also be dwelling to some 200 feral horses, that are descendants of navy horses deserted throughout World War 2.
The research beneficial a focused grassland restoration challenge that might embody the management of invasive species, improved surveillance, elevated staffing, and the relocation of forest villages to scale back human influence and help community-based conservation efforts.
“Protecting the panorama via knowledgeable LULC-based administration can assist preserve essential habitat patches, mitigate anthropogenic degradation, and improve the survival prospects of native floral and faunal assemblages in DSNP,” it concluded.
