Above-belowground interactions in alpine ecosystems on the roof of the world

He, Jin‐Sheng; Dong, Shiyun; Shang, Zhanhuan; Sundqvist, Maja K.; Wu, Gao‐Lin; Yang, Yunfeng

doi:10.1007/s11104-020-04761-4

Cited by 23 publications

(21 citation statements)

References 38 publications

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“…The Tibetan Plateau is the largest and highest plateau in the world, known as the ‘roof of the world.’ For several decades, the environment of the Tibetan Plateau has been facing the dual pressures of climate warming and increased human activities (He et al, 2021). The Lhasa River basin is the economic hub of the Tibetan Plateau and is one of the regions with the greatest increase in human activity (Li et al, 2020).…”

Section: Introductionmentioning

confidence: 99%

Gully erosion on alluvial fans can be mitigated by altering the hydrological connectivity between an alluvial fan and the contributing catchment: a study in the Lhasa River basin

Zhao

Chen

et al. 2022

Land Degrad Dev

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In the Lower Lhasa River basin of the Tibetan Plateau, gully erosion poses a threat to alluvial fans (AF), which are the main available land resource for agriculture. Runoff from the whole contributing catchment is concentrated in AF, which makes influencing factors of AF gully erosion more complex than it is for hillslopes. There is a lack of quantitative research about the influencing factors and mechanisms of AF gully erosion. The main objectives of this study were to: (1) quantify gully erosion on AF; and (2) identify the controlling factors of gully erosion on AF. The gullies of 12 AF were investigated by unmanned aerial vehicle (UAV). To help understand better the gully erosion on AF, nine morphological parameters were measured, four gully quantitative characteristics were calculated, and 16 factors affecting the gully erosion on AF were analyzed. The gully width–depth ratio of over 20 on the studied AF is larger than that usually seen in other regions. The mean value of gully amount density (GAD), gully density (GD), the degree of gully dissection (GDD), and gully volume modulus (GVM) were 26.51 km−2, 4.93 km·km−2, 7.16%, and 1.28 × 10−4 km3·km−2, respectively. Linear correlations showed a significant (p < 0.05) relationship between the gully quantitative characteristics of AF and the catchment gully density. So, catchment gully density may indirectly affect gully erosion on AF by influencing hydrological connectivity and then changing generation and confluence processes of runoff in catchment. Therefore, gully erosion on AF can be mitigated by shifting hydrology pathway on AF and reducing hydrological connectivity in contributing catchment.

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Section: Introductionmentioning

confidence: 99%

Gully erosion on alluvial fans can be mitigated by altering the hydrological connectivity between an alluvial fan and the contributing catchment: a study in the Lhasa River basin

Zhao

Chen

et al. 2022

Land Degrad Dev

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“…The Tibetan Plateau has the largest expanse of high-elevation permafrost in the world and has unique ecosystems typically characterized by low temperature, low atmospheric pressure, and oxygen concentrations, and are experiencing climate warming that may jeopardize the functioning of the ecosystems (Klein et al, 2014;He et al, 2021). The presence or absence of permafrost determines the structure and nutrient status of the soil and affects plant community structure and production (Yi et al, 2011;Yang et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

Homogenization in Species Composition and No Change in Aboveground Biomass Across Tibetan Permafrost Regions Over Ten Years

Yang

Klanderud

Yang

et al. 2022

Front. Environ. Sci.

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The Tibetan Plateau is the most extensive high-elevation grassland on Earth, with the largest expanse of high-elevation permafrost. It is experiencing climate warming that is projected to continue at rates above the global mean, potentially jeopardizing ecosystem functioning. We conducted a broad-scale resampling project in the permafrost region of Tibet to examine if plant production and diversity had changed over time. We recorded vascular plant species occurrences and harvested aboveground biomass at 36 alpine grassland sites in 2008 and 2018. Our results show that aboveground biomass increased for legumes and forbs, but decreased for grasses and sedges, resulting in no overall change in the aboveground biomass during the 10-year period. Our results indicate that functional group abundance may shift from grasses and sedges toward more legumes and forbs, and that species composition is becoming more similar between grassland types, and thus, beta diversity is decreasing in the permafrost region of Tibet.

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“…Alpine grasslands with extreme circumstances are extremely sensitive to precipitation changes (Chen et al 2013;Ding et al 2017). In recent decades, mean annual precipitation has been markedly enhanced in Qinghai plateau (He et al 2021), but the water limitation for vegetation became stronger (Ding et al 2018). Most plants in alpine grasslands of Tibetan Plateau were colonized by AM fungi (Gai et al 2006) and AM fungi are abundant (Gao & Guo 2010).…”

Section: Introductionmentioning

confidence: 99%

“…Most plants in alpine grasslands of Tibetan Plateau were colonized by AM fungi (Gai et al 2006) and AM fungi are abundant (Gao & Guo 2010). Thus advancing the understanding of the symbiotic associations between plants and AM fungi is essential for alpine grassland management and conservation under rapid climate change (He et al 2021), because AM fungi play an important role in plant nutrient availability and plant community productivity and biodiversity (van der Heijden et al 1998;Collins & Foster 2009). Here, we selected three sites with similar precipitation difference and plant species at the ambient precipitation gradients in the alpine meadow of the Tibetan plateau.We utilized the ambient gradient of mean annual precipitation (550-700 mm) and the precipitation differences (approx.70 mm) between neighing sites.…”

Section: Introductionmentioning

confidence: 99%

Plant traits and soil properties involved in nutrient and carbon exchange predict arbuscular mycorrhizal fungal communities under nature ambient precipitation gradients

Zhang¹,

Ma²,

Ma³

et al. 2022

Preprint

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Aims Despite several studies demonstrating that plant traits determine plant community response to precipitation changes and that precipitation indirectly affects arbuscular mycorhizal (AM) fungal communities by changes in plant community attributes. Yet the impacts of plant traits on AM fungal communities are still unknown under precipitation change. Methods We selected three sites extremely ideal to examine the effects of plant community functional traits and soil properties on AM fungal communities due to similar plant species and precipitation differences in an alpine meadow of Tibetan Plateau. Results We observed that high precipitation markedly enhanced AM fungal diversities, plant community functional diversities and soil nutrients. Total soil nitrogen and soil available phosphorus predicted variation in AM fungal diversities, while AM fungal biomass was predicted by plant community-weighed means of nitrogen and phosphorus ratio (CWM-N:P). Members of Glomus preferred to inhabit in the sites with low precipitation. A distance-based redundancy analysis (db-RDA) demonstrated that AM fungal community structure was predicted by CWM-N:P, plant community-weighed means of photosynthetic rate (CWM-Pn), total soil carbon and plant community functional dispersion (FDis). Conclusions We conclude that plant traits and soil properties, which are involved in nutrient-carbon (C) exchange in AM fungal symbionts, shape AM fungal communities under ambient precipitation gradients. Our finding provided a novel insight into AM fungal community assembly from the perspective of nutrient-carbon exchange.

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Above-belowground interactions in alpine ecosystems on the roof of the world

Cited by 23 publications

References 38 publications

Gully erosion on alluvial fans can be mitigated by altering the hydrological connectivity between an alluvial fan and the contributing catchment: a study in the Lhasa River basin

Gully erosion on alluvial fans can be mitigated by altering the hydrological connectivity between an alluvial fan and the contributing catchment: a study in the Lhasa River basin

Homogenization in Species Composition and No Change in Aboveground Biomass Across Tibetan Permafrost Regions Over Ten Years

Plant traits and soil properties involved in nutrient and carbon exchange predict arbuscular mycorrhizal fungal communities under nature ambient precipitation gradients

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