Plant litter enters the soil as main nutrient for alpine meadow ecosystems, and amount of input has a significant effect on plant diversity, ecological niches, interspecific connectivity. The niche width, overlap associations species in Sanjiangyuan area Qinghai-Tibetan Plateau were investigated using statistical methods, competitive linkages between limited resources within community stable coexistence among populations under different levels inputs explored. (1) Litter could significantly...

The source region of the Yellow River, China, experienced degradation during 1980s and 1990s, but effective ecological restoration projects have restored alpine grassland ecosystem. local government has taken action to restore area since 1996. Remote sensing monitoring results show an initial this ecosystem with structural transformation land cover from 2000 2009 as low- high-coverage recovered. From 2009, low-coverage expanded by over 25% bare soil decreased approximately 15%. To examine...

Modeling the current distribution of and predicting suitable habitats for threatened species support conservation restoration planning process. Therefore, purpose this study was to model actual predict environmentally Carex alatauensis S.R.Zhang 2015, a locally native grass on Qinghai–Tibet Plateau. To realize objective, based geographical samples within natural C. alatauensis, dominant climatic factors in its potential range were analyzed using maximum entropy (MaxEnt) model. The results...

Despite extensive research on the impact of warming and nitrogen deposition soil organic carbon components, response mechanisms microbial community composition enzyme activity to remain poorly understood. This study investigated effects components in Tibetan Plateau alpine meadow elucidated regulatory characteristics, including community, activity, stoichiometry, components. Results indicated that both significantly increased carbon, readily oxidizable dissolved biomass carbon. The...

The complete cp genomes of Pedicularis chinensis (GenBank accession number: OQ587614) and kansuensis OQ587613) were sequenced, assembled, annotated. Their chloroplast (cp) genome lengths 146,452 bp, 146,852 respectively; 120 116 genes identified, comprising 75 72 protein-coding (PCGs), 37 36 transfer RNA (tRNA) genes, 8 ribosomal (rRNA) for P. kansuensis, respectively. A simple sequence repeat (SSR) analysis revealed that the repetitive sequences mainly composed mononucleotide repeats (A/T...

Abstract Background Daye No.3 is a novel cultivar of alfalfa ( Medicago sativa L.) that well suited for cultivation in high-altitude regions such as the Qinghai‒Tibet Plateau owing to its high yield and notable cold resistance. However, limited availability transcriptomic information has hindered our investigation into potential mechanisms tolerance this cultivar. Consequently, we conducted de novo transcriptome assembly overcome limitation. Subsequently, compared patterns gene expression...

Plant species and functional diversity play an important role in the stability sustainability of grassland ecosystems. However, changes mechanisms plant under warming nitrogen deposition are still unclear. In this study, we investigated soil characteristics alpine meadows on Qinghai-Tibet Plateau to explore communities deposition, as well their interrelationships key determinants. The results showed that warming, interactions had significant effects (plant Shannon-Wiener index) (functional...

Litter, as a major carbon source in alpine meadow ecosystems, seriously affect the variation of plant-microbe pools meadows. In order to study response plant-microbial biomass pool trade-offs degraded litter inputs. We investigated effects different levels inputs on meadows plant aboveground communities, root, and total communities soil microbial pools, clarified variable factors that balance process influencing trade-offs. (1) Litter had positive effect community root were all maximized T3...

The grass-bean hybrid system in alpine regions was an important method to increase the root and nutrients of grasses, however, there no clear conclusion from research on whether nitrogen——phosphorus fertiliser additions had enhancement effect hybrids.Through establishment artificial mix region at 4,270 meters above sea level, we examined effects exogenous fertilizer forage roots annual grass-legume using (fertilizer application: A 1~4 vs. ratio B 1~5 ).The results illustrate that: addition...

In order to reveal the overall research progress in field of alpine meadows. this study, a visual clustering analysis literature was conducted using VOS viewer software. The English related meadow searched Web Science database with publication dates limited 2020–2021, and 3,607 papers were retrieved from Excel By analyzing basic profiles annual volume, country/region, journal, institution, author, keywords, hot spots development trends derived. data show that China is top global country for...

The fate and redistribution of nitrogen in terrestrial ecosystems are paramount significance to cycling. Nevertheless, the destiny content nitrate (NO3–) ammonium (NH4+) grassland context atmospheric deposition remain unclear. This study utilized field-based 15N tracing experiments investigate NO3– NH4+ a high alpine meadow on Tibetan Plateau over three growing seasons, elucidating patterns allocation plant stems, roots, soil. results indicate that: 1) exhibit distinct behaviors distribution...

Abstract Interactions between distantly related herbivores exert powerful influences on ecosystems, but most studies to date have only considered unidirectional effects. Few simultaneously examined the mutual effects that vertebrate and insect one another. We conducted a set of manipulative experiments evaluate potential competition facilitation two pairs herbivore taxa: an caterpillar ( Gynaephora alpherakii ) large herbivores, yak Bos grunniens Tibetan sheep Ovis aries tibetica ). found...

Elymus dahucirus is an essential plant for ecological restoration in fragile areas and mining area restoration. As lawn grass, it can quickly cover soil prevent erosion, so commonly used as a pioneer grass greening slope protection. In recent years, with the development of mineral resources, Qinghai–Tibet Plateau facing threat heavy metal cadmium (Cd) pollution. E. dahuricus host filamentous fungus Epichloë bromicola. To make better use advantages that bring to plants alleviate pollution...

Abstract Kobresia pygmaea Clarke is mainly distributed in the alpine region from 3800 to 4500 m elevation on Qinghai-Tibet Plateau. It excellent low-temperature tolerance and trampling resistance plays an important role maintaining stability of regional ecological environments. Mainly based chlorophyll fluorescence imaging technique, using grass sods blocks with a size 20 × cm 2 collected K. forb meadow, simulated treatment cultural room 8 °C/4 °C (day/night) at diurnal photoperiod, we...

In order to investigate the characteristics and driving factors of keystone species change in vegetation communities, we conducted a network analysis analyze complexity grassland plant communities species. We study which established six plots degraded grassland, intact various ages artificial grassland. systematically analyzed community soil physical-chemical properties under different treatments. Our findings revealed that 5-year-old with lower diversity (Shannon-Weiner index: 1.70,...

Exogenous nitrogen addition can alter plant growth and community structure, thereby influencing soil carbon storage ultimately impacting ecosystem services functions.Previous studies have primarily focused on the effects of biological or abiotic factors in alpine meadows, but there is a lack research investigating changes organic total as well their controlling under addition.Therefore, this study examined across four levels addition.The results showed that input significantly increased...

Abstract δ 15 N values in plants and soils can effectively help understand nitrogen cycling ecosystems, however the driving factors mechanisms of alpine meadow ecosystems Three-River Source region are largely unknown, especially under different form additions. To address this knowledge gap, we conducted a tracer field micro-plot experiment from June 2020 to September 2022 at an site Qinghai Province, China, with three forms added (( NH 4 ) 2 SO4, Ca( NO 3 , CO( calculate corresponding Nplant...