近日，令人振奋的消息传来，在读博士张瑞丰的杰出研究论文《Microplastics promote the invasiveness of invasive alien species under fluctuating water regime》已成功被权威期刊《Journal of Applied Ecology》（影响因子/JCR分区：高达5.0/Q1）采纳并发表。这一成果不仅体现了张瑞丰同学深厚的学术造诣和独到的研究视角，更展现了他对生态环境问题深刻的理解和不懈的追求。在此，我们衷心祝贺张瑞丰同学取得这一学术上的重要突破！

Microplastic pollution and alien plant invasions are two important threats to terrestrial ecosystems.Microplastics(MPs) alter the physical and chemical characteristics of soil,potentially affecting the performance of alien plants.However,previous studies have overlooked the impact of weather on invasive plants in areas polluted by MPs.With the global increase in extreme rain fall events,it is imperative to redefine the correlation between MPs and invasive plants.

Here,we conducted an experiment in a climate chamber to examine the effects of MPs on the growth and development of both native and invasive alien plants under constant and fluctuating water regime(FWR).The FWR simulated extreme water pulses during the2016-2020 growing seasons in Wuhan,China.

Our results indicated that biomass accumulation and roots development were influenced by water conditions and MPs pollution in both invasive and native species.The extent of the effects varied between the two groups of plant species.FWR promoted plant growth and fine roots development in invasive plants but reduced the maximum quantum efficiency of photosystemⅡ(F,/Fm)and nonphotochemical quenching(NPQ)indices of native plants.Moreover,FWR attenuated the negative effects of polybutylene succinate (PBS,degradable MPs)on biomass and root characteristics (length,surface area,and tips).FWR compensates the negative impacts of MPs on the total and below ground biomass of the invasive species Paspalum dilatatum and Sphagneticola trilobata, but not on the native species. Consequently,invasive species showed better performance than native species in the fine roots development of biomass growth and chlorophyll fluorescence under the combined effects of MPs and FWR.

Synthesis and Applications.Our findings suggest that MPs pollution enhances the competitiveness of invasive alien species over the native species when exposed to pronounced dry-wet water cycle conditions,potentially affecting the composition and biodiversity of the ecosystems.Thus,controlling MPs pollution should be a part of the management strategy to conserve biodiversity and ecosystems.