Patterns and mechanisms influencing plant diversity in an arid desert region riparian zone of the Aqikesu River, Xinjiang, China

Xueni, 张雪妮 Zhang; Guanghui, 吕光辉 Lv; Tingquan, 王庭权 Wang; Yu, 马玉 Ma; ABLIZ·Abdurahman, 阿布里孜·阿不都热合曼; Xiaoying, 赵晓英 Zhao; Zhenjie, 郭振洁 Guo; Xiuyi, 朱修逸 Zhu

doi:10.5846/stxb201401160128

Cited by 2 publications

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“…The sampling region was at the north side of Aqikesu River. The soil water content and total salt content gradually decreased with the increase of distance from the riverbank [34]. Three 10 m × 10 m plots were selected along the water and salt gradient from high to low: H (high water and salt), M (medium water and salt), L (low water and salt) (Fig 1).…”

Section: Soil Collectionmentioning

confidence: 99%

Structure and driving factors of the soil microbial community associated with Alhagi sparsifolia in an arid desert

Jiang

Zhang

et al. 2021

PLoS ONE

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Environmental properties are important factors in structuring soil microbial communities. The primary driving factors vary in different ecosystems. In the present work, we analyzed the microbial communities of rhizosphere and bulk soils associated with the halophyte Alhagi sparsifolia across three salt/water gradients in the desert area around Ebinur Lake Basin, China, using high-throughput sequencing technology. We found that there were significant differences in soil water content (SWC), soil salinity (SAL), total nitrogen (TN), and total phosphorus (TP) contents between the three water/salt gradients. In the L (low water and salt) plot, Actinobacteria was the most abundant bacterial phylum while Ascomycota was the dominant fungal phylum. The relative abundance of Actinobacteria was negatively correlated with soil pH, soil organic carbon (SOC), TP, and available phosphorus (AP). The abundance of Bacteroidetes was significantly positively correlated with soil SOC, SWC, SAL, pH, TN, and TP (P < 0.05). The abundance of fungal phylum Chytridiomycota was significantly positively correlated with pH (P < 0.01), SWC, AP, and sulfate ion (P < 0.05). SOC and nitrate nitrogen were the main factors impacting the bacterial community, while ammonium nitrogen (NH4+) and TP were the main driving forces for the fungal community. Soil nutrients were the main contributors to the dissimilarities in the bacterial and fungal communities, explaining 48.06% and 44.45% of the variation. SWC, SAL, and pH explained only a small percentage of the microbial community dissimilarity. In conclusion, soil microbial community structure was affected by SWC, SAL, pH, and soil nutrients, with soil nutrients as the main driving factors. Nitrogen has a differential effect on the different microbial communities: bacterial communities of Alhagi sparsifolia were mainly affected by nitrate nitrogen, while fungal communities were mainly driven by ammonium nitrogen.

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Section: Soil Collectionmentioning

confidence: 99%

Structure and driving factors of the soil microbial community associated with Alhagi sparsifolia in an arid desert

Jiang

Zhang

et al. 2021

PLoS ONE

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“…The flux tower was positioned approximately 100 m from the north bank of the Aqikesu River (44°37′4.8″N, 83°33′59.4″E) within the nature reserve, with a construction height of 33 m ( Teng et al., 2021 ). There are over 30 species of plants in the study area ( Zhang et al., 2015 ). Species such as Populus euphratica , Haloxylon ammodendron and Phragmites australis are dominant within investigated riparian vegetation and represent over then 60% of total vegetation coverage in the studied area.…”

Section: Methodsmentioning

confidence: 99%

Impact of meteorological variability on diurnal and seasonal net ecosystem productivity in a desert riparian forest ecosystem

Teng,

Gong,

et al. 2024

Front. Plant Sci.

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The desert riparian forests are susceptible to meteorological changes and contribute significantly to the net ecosystem productivity (NEP) variations of arid ecosystems. However, the responsive patterns of their NEP variations to the meteorological variabilities remain inadequately comprehended. To address this gap, we utilized seven years of eddy covariance flux measurements in a representative desert riparian forest to investigate the NEP variations and its response to changing meteorological factors across diverse temporal scales. The results revealed significant periodic variations in half-hourly NEP, with dominant cycles spanning from five hours to one year, with a principal oscillation period of one day. Key meteorological factors including global solar radiation (Rg), relative humidity (RH), air temperature (Ta), soil temperature (Ts), and vapor pressure deficit (VPD) exhibited synchronization with NEP on daily scales. This synchronization, coupled with the observed one-day periodic NEP variations, provides robust evidence supporting the existence of a circadian rhythm in the ecosystem carbon exchange of desert riparian forest regulated by meteorological conditions. Seasonal patterns were significant in the impact of Rg phase, Ta diurnal amplitude, and VPD diurnal amplitude on NEP diurnal amplitude and phase. The NEP diurnal amplitude significantly, directly, and positively affected daily NEP in both the dormant and growing seasons, whereas its phase yielded significant negative effects (P< 0.05). The averages, amplitudes, and phases of diurnal meteorological conditions controlled the daily NEP by regulating NEP diurnal amplitude and phase. These findings provide evidence that the variability in circadian rhythms, caused by the increase in diurnal Ta and VPD, significantly impact the daily NEP at an ecosystem scale. This study enriches our comprehension of the meteorological mechanisms governing diurnal and seasonal carbon uptake dynamics within desert riparian forests, providing fresh insights into the direct and indirect roles of climate change in shaping patterns of ecosystem carbon exchange.

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Patterns and mechanisms influencing plant diversity in an arid desert region riparian zone of the Aqikesu River, Xinjiang, China

Cited by 2 publications

References 0 publications

Structure and driving factors of the soil microbial community associated with Alhagi sparsifolia in an arid desert

Structure and driving factors of the soil microbial community associated with Alhagi sparsifolia in an arid desert

Impact of meteorological variability on diurnal and seasonal net ecosystem productivity in a desert riparian forest ecosystem

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