Mapping and evaluating plant phenology in the Qinghai-Tibet Plateau: A digital approach using the plant Phenological Index (PI)

Zhang, Yan Qing; Zhou, Xiaojing; Zhou, Hua

doi:10.1016/j.chnaes.2023.04.002

Cited by 3 publications

(1 citation statement)

References 19 publications

(38 reference statements)

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“…The Gramineae plants were larger and occupied a higher niche quickly, in the dominant position in the whole community, so the aboveground biomass was larger, consistent with the results of this study (Li et al, 2021). The amount of Cyperaceae plants that needed fewer resources increased gradually after 5 years of establishment, and a small amount of Cyperaceae plants appeared during the gradual succession of the artificial grassland, which indicated that the biomass of weeds decreased when the artificial grassland entered the natural recovery process; these results are consistent with those of this study (Zhang et al, 2003). Soil fertility declined after 10 years of establishment, and when nutrients were scarce, plants tended to allocate resources to underground roots to improve the absorption and utilization efficiency of limited soil resources.…”

Section: Discussionsupporting

confidence: 91%

Plant community characteristics, soil nutrients and their interactions in artificial grassland with different establishment years in the Three Rivers Headwater Region

et al. 2023

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Clarifying the relationship between plant and soil characteristics under different establishment years of artificial grassland can improve the adaptive management ability of alpine grassland, which is of great significance to the sustainable development of alpine grassland ecosystems. This study used field quadrat surveys and indoor analyses to determine the plant community and soil nutrient characteristics of artificial grasslands with different establishment years and analyzed the characteristic differences and internal relations under different establishment years combined with correlation analysis and redundancy analysis. The results showed that the vegetation coverage decreased significantly (p < .05) after the establishment of 5 years, the biomass of artificial grassland decreased with the increase in establishment years and the species diversity index showed a “V‐shaped” change. With the increase in establishment years, the total nutrients of the artificial grassland increased, and the available nutrients decreased. The results of correlation analysis and redundancy analysis showed that soil nutrients in the 0–30 cm soil layer were intrinsically correlated with biomass and soil pH, soil water content and soil bulk density were significantly correlated with plant community changes during the establishment of artificial grassland. This study will help to clarify the changes in plant and soil characteristics of artificial grassland with different establishment years and provide a scientific and theoretical basis for restoring degraded alpine grassland.

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Section: Discussionsupporting

confidence: 91%

Plant community characteristics, soil nutrients and their interactions in artificial grassland with different establishment years in the Three Rivers Headwater Region

et al. 2023

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Biological response to Przewalski’s horse reintroduction in native desert grasslands: a case study on the spatial analysis of ticks

Zhang,

Liu,

Zhang

et al. 2024

BMC Ecol Evo

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Background Reintroduction represents an effective strategy for the conservation of endangered wildlife, yet it might inadvertently impact the native ecosystems. This investigation assesses the impact of reintroducing endangered Przewalski's horses into the desert grassland ecosystem of the Kalamaili Nature Reserve (KNR), particularly its effect on the spatial distribution of ticks. In a 25 km2 core area of Przewalski's horse distribution, we set up 441 tick sampling sites across diverse habitats, including water sources, donkey trails, and grasslands, recording horse feces and characteristics to analyze the occurrence rate of ticks. Additionally, we gathered the data of 669 fresh feces of horses. To evaluate the spatial dynamics between these feces and ticks, we used methods such as Fixed Kernel Estimation (FKE), Moran’s I spatial autocorrelation index, and Generalized Linear Models (GLM). Results The dominant species of ticks collected in the core area were adult Hyalomma asiaticum (91.36%). Their occurrence rate was higher near donkey trails (65.99%) and water sources (55.81%), particularly in areas with the fresh feces of Przewalski's horses. The ticks’ three risk areas, as defined by FKE, showed significant overlap and positive correlation with the distribution of Przewalski's horses, with respective overlap rates being 90.25% in high risk, 33.79% in medium risk, and 23.09% in low risk areas. Moran's I analysis revealed a clustering trend of the fresh feces of Przewalski's horses in these areas. The GLM confirmed a positive correlation between the distribution of H. asiaticum and the presence of horse fresh feces, alongside a negative correlation with the proximity to water sources and donkey trails. Conclusions This study reveals the strong spatial correlation between Przewalski's horses and H. asiaticum in desert grasslands, underlining the need to consider interspecific interactions in wildlife reintroductions. The findings are crucial for shaping effective strategies of wildlife conservation and maintaining ecological balance.

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Issues, Progress, and Recommendations in the Construction of Ecological Barrier on the Mongolian Plateau from the Perspective of Big Data

Juanle,

Kai,

Shuxing

et al. 2024

Journal of Resources and Ecology

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Mapping and evaluating plant phenology in the Qinghai-Tibet Plateau: A digital approach using the plant Phenological Index (PI)

Cited by 3 publications

References 19 publications

Plant community characteristics, soil nutrients and their interactions in artificial grassland with different establishment years in the Three Rivers Headwater Region

Plant community characteristics, soil nutrients and their interactions in artificial grassland with different establishment years in the Three Rivers Headwater Region

Biological response to Przewalski’s horse reintroduction in native desert grasslands: a case study on the spatial analysis of ticks

Issues, Progress, and Recommendations in the Construction of Ecological Barrier on the Mongolian Plateau from the Perspective of Big Data

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