Warming diminishes the stability of primary productivity in global grass- and forb-dominated ecosystems

Gao, Qingzhu; Ganjurjav, Hasbagan; Hu, Guozheng; Xu, Hongmei; Schwartz, Mark W.; Gornish, Elise S.; Zhu, Wenquan

doi:10.1088/2515-7620/acab4f

Cited by 3 publications

(1 citation statement)

References 42 publications

(97 reference statements)

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“…4d), which were different from previous studies. Although some studies indicated that climate warming may reduce community stability (Gao et al, 2022;Liu et al, 2021), Liu et al (2021) found that the decrease in community stability is caused by the decrease in productivity due to increased water limitation by increase temperature. Therefore, the impact of temperature change on community stability likely depends on water constraints.…”

Section: Discussionmentioning

confidence: 99%

Divergent driving mechanisms of community temporal stability in drylands of China

Wang¹,

Wang²,

Fu³

et al. 2023

Preprint

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Climate change and human activities are changing the structure and function of dryland ecosystems at unprecedented rate, thus threatening the stability of ecosystems. The stability of dryland ecosystems is vital for ecological security and local livelihoods. However, the mechanisms that underlie ecosystem stability in drylands remain uncertain due to limited field data from regional studies. Combined with transect survey in the drylands of China along the aridity gradient and remote sensing data, we characterized community temporal stability and identified its driving mechanisms along the aridity gradient. The results showed the community temporal stability in drylands of China revealed a U-shaped curve with increasing aridity and its major driving mechanisms shifted at an aridity level of ~0.88. In regions where aridity is below 0.88, increasing precipitation and species richness resulted in higher community productivity and community stability. In regions where aridity is above 0.88, however, higher soil organic carbon content and species richness may lead to higher variability of community productivity and lower ecosystem stability. Overall, our findings revealed that there existed an aridity threshold leading to abrupt changes on community stability in drylands of China. Our study also suggested divergent driving mechanisms of community stability above and below the threshold, which should be considered in policy making regarding the ecosystem management of drylands.

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Section: Discussionmentioning

confidence: 99%

Divergent driving mechanisms of community temporal stability in drylands of China

Wang¹,

Wang²,

Fu³

et al. 2023

Preprint

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Divergent driving mechanisms of community temporal stability in China's drylands

Wang,

et al. 2024

Environmental Science and Ecotechnology

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In the Qaidam Basin, Soil Nutrients Directly or Indirectly Affect Desert Ecosystem Stability under Drought Stress through Plant Nutrients

Zhao,

Chen,

Sun

et al. 2024

Plants

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The low nutrient content of soil in desert ecosystems results in unique physiological and ecological characteristics of plants under long-term water and nutrient stress, which is the basis for the productivity and stability maintenance of the desert ecosystem. However, the relationship between the soil and the plant nutrient elements in the desert ecosystem and its mechanism for maintaining ecosystem stability is still unclear. In this study, 35 sampling sites were established in an area with typical desert vegetation in the Qaidam Basin, based on a drought gradient. A total of 90 soil samples and 100 plant samples were collected, and the soil’s physico-chemical properties, as well as the nutrient elements in the plant leaves, were measured. Regression analysis, redundancy analysis (RDA), the Theil–Sen Median and Mann–Kendall methods, the structural equation model (SEM), and other methods were employed to analyze the distribution characteristics of the soil and plant nutrient elements along the drought gradient and the relationship between the soil and leaf nutrient elements and its impact on ecosystem stability. The results provided the following conclusions: Compared with the nutrient elements in plant leaves, the soil’s nutrient elements had a more obvious regularity of distribution along the drought gradient. A strong correlation was observed between the soil and leaf nutrient elements, with soil organic carbon and alkali-hydrolyzed nitrogen identified as important factors influencing the leaf nutrient content. The SEM showed that the soil’s organic carbon had a positive effect on ecosystem stability by influencing the leaf carbon, while the soil’s available phosphorus and the mean annual temperature had a direct positive effect on stability, and the soil’s total nitrogen had a negative effect on stability. In general, the soil nutrient content was high in areas with a low mean annual temperature and high precipitation, and the ecosystem stability in the area distribution of typical desert vegetation in the Qaidam Basin was low. These findings reveal that soil nutrients affect the stability of desert ecosystems directly or indirectly through plant nutrients in the Qaidam Basin, which is crucial for maintaining the stability of desert ecosystems with the background of climate change.

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Warming diminishes the stability of primary productivity in global grass- and forb-dominated ecosystems

Cited by 3 publications

References 42 publications

Divergent driving mechanisms of community temporal stability in drylands of China

Divergent driving mechanisms of community temporal stability in drylands of China

Divergent driving mechanisms of community temporal stability in China's drylands

In the Qaidam Basin, Soil Nutrients Directly or Indirectly Affect Desert Ecosystem Stability under Drought Stress through Plant Nutrients

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