MaxEnt-Based Predictions of Suitable Potential Distribution of Leymus secalinus Under Current and Future Climate Change

Plants, Год журнала: 2025, Номер 14(2), С. 293 - 293

Опубликована: Янв. 20, 2025

Grassland degradation is a serious ecological issue in the farming–pastoral ecotone of northern China. Utilizing native grasses for restoration degraded grasslands an effective technological approach. Leymus secalinus superior indigenous grass species grassland Therefore, excavation potential distribution areas L. and important factors affecting its crucial conservation grasslands. Based on 357 data points collected natural secalinus, this study employs jackknife method Pearson correlation analysis to screen out 23 variables spatial distribution. The MaxEnt model was used herein predict current suitable area under different SSP scenarios (SSP1-26, SSP2-45, SSP5-85) future climate. results showed following: (1) Mean diurnal temperature range, annual mean temperature, precipitation wettest quarter, elevation are major impacting secalinus. (2) Under climatic conditions, mainly distributed China; addition, certain also exist parts Xinjiang, Tibet, Sichuan, Heilongjiang, Jilin. (3) climate change scenarios, generally same as at present, with slight changes largest expansion 97,222 km2 2021–2040 SSP1-26 scenario shrinkage 2061–2080 SSP2-45 scenario, 87,983 km2. Notably, boundary middle- high-suitability reduced, while northeastern some Heilongjiang Jilin expanded. revealed conditions range which can provide reference conservation, introduction, cultivation new zones, avoiding blind introduction inappropriate habitats, sustaining economic benefits associated services.

Язык: Английский

Assessment of Vegetation and Soil Characteristics of Calligonum Leucocladum Populations in the Balkhash Region, Kazakhstan

Research Square (Research Square), Год журнала: 2025, Номер unknown

Опубликована: Фев. 10, 2025

Aims The study evaluates the ecological, soil, and geobotanical characteristics of three populations Calligonum leucocladum in Taukum Saryesik-Atyrau sands Balkhash region, including Malaysary population. Methods Geobotanical surveys were conducted to assess species composition, vegetation cover, ecological conditions across populations. Soil analyses performed measure humus content, pH, texture, trace elements. NDVI (Normalized Difference Vegetation Index) analysis from 2015 2024 was used monitor dynamics. Results revealed differences protective Population 1 (Taukum sands) showed lowest content (0–0.1%) a sandy texture (68.22% fine sand), with significant degradation observed through 2024. 2 (Saryesik-Atyrau sands, Bakanas) exhibited highest levels (0.07–0.17%), loam soils, most stable trends, suggesting favorable for vegetation. 3 Malaysary) had intermediate (0–0.07%) soils (67.66% data indicating similar 1. All found on strongly alkaline (pH 9.29–10.22), cadmium concentrations exceeding permissible limits Populations 3. Conclusions highlighted predominance drought-resistant species, such as aphyllum C. leucocladum, which play key role stabilizing ecosystems. However, habitat vary significantly, emphasizing need targeted conservation strategies, especially relatively 2, mitigate support ecosystem sustainability.

Язык: Английский

Chemical Composition, Anti-Tyrosinase and Antioxidant Potential of Essential Oils from Acorus calamus (L.) and Juniperus communis (L.)

Molecules, Год журнала: 2025, Номер 30(11), С. 2417 - 2417

Опубликована: Май 31, 2025

The essential oils (EOs) represent a natural source of diverse phytoconstituents that may exert wide range health-promoting effects, including antioxidative, anti-inflammatory, antimicrobial, and immunomodulatory activities. Compounds with antioxidative anti-tyrosinase properties present in EOs suppress excessive melanin production protect skin cells from oxidative stress factors often aggravate the pigmentation process. Acorus calamus L. Juniperus communis plants have been traditionally used phytotherapy, either individually or combination. However, biological pharmacological effects derived A. rhizomes (EOA) J. cone-berries (EOJ) remain underexplored. This study aimed to evaluate (1) chemical composition both EOA EOJ using gas chromatography–mass spectrometry (GC-MS) technique; (2) activity two examined EOs; (3) their antioxidant potential against DPPH ABTS free radicals. In addition, activities mixtures were also investigated. GC-MS analyses identified 48 81 compounds EOJ, respectively. main constituents sesquiterpenoids, acorenone (18.1%), preisocalamendiol (12.0%), shyobunone (7.5%), isoshyobunone (5.7%). contrast, was primarily composed α-pinene (22%), monoterpene. vitro demonstrated individual combined exhibited notable these is discussed.

Язык: Английский