The noxious plant species Parthenium hysterophorus L. has become a major concern for the conservation of many natural and managed areas. The species is known for its various adverse effects on the invaded ecosystems, particularly in terms of biodiversity loss. Currently, P. hysterophorus is a leading invasive species widespread in the grasslands of productive and diversity rich Indo-Gangetic plains of India and is responsible for various changes in the ecosystem. The present study addresses the changes that P. hysterophorus can bring in the vegetation structure (species richness, species evenness, and species composition) of the grasslands of Indo-Gangetic plain. To broaden our understanding of the invasion success and facilitated expansion, we also focus on the variability of soil nitrogen pool and processes as a consequence of invasion. We report that in the presence of P. hysterophorus, the species diversity, evenness, composition and richness were altered, affecting many native and non-native flora of the ecosystem. The effect was more prominent during the second and third year of the study with more increase in the invasion outcomes. Significant changes in soil nitrogen (N) dynamics, particularly, increased available (N), N-mineralization and microbial biomass N have been found in the invaded plots along with changes in vegetation of the grassland community. Overall, the result suggested that the invasive species, P. hysterophorus, modifies the soil and this modification is correlated with changes in vegetation structure and this situation is likely to further facilitate severe alterations in the ecosystem and could favor encroachment of other non-native species in the area.

有害的植物种类Parthenium hysterophorus L.已成为许多自然和管理区保护的主要关注点。该物种以其对入侵的生态系统的各种不利影响而闻名，特别是在生物多样性丧失方面。目前，P。hysterophorus是一种主要的入侵物种，广泛分布在印度生产和多样性丰富的印度恒河平原的草原上，并负责生态系统的各种变化。本研究解决了P. hysterophorus的变化可以引入印度—恒河平原草原的植被结构（物种丰富度，物种均匀度和物种组成）。为了拓宽对入侵成功的理解并促进扩展，我们还关注入侵导致的土壤氮库和过程的变异性。我们报告说，在P. hysterophorus的存在下，物种多样性，均匀度，组成和丰富度发生了变化，影响了生态系统的许多原生和非原生植物区系。在研究的第二年和第三年，随着侵袭结果的增加，这种效应更加突出。在被入侵的农田中，随着草地群落植被的变化，土壤氮（N）的动态发生了显着变化，尤其是有效氮（N）的增加，氮矿化和微生物生物量氮的变化。总体而言，该结果表明，入侵种P. hysterophorus对土壤进行了改性，并且这种改性与植被结构的变化有关，这种情况可能会进一步促进生态系统的严重变化，并可能侵犯其他非本地物种在那地区。