Impacts of plant and soil stoichiometry on species diversity in a desert ecosystem

Ji, Suwan; Jiang, Longyang; Hu, Dong; Lv, Guanghui

doi:10.1093/aobpla/plac034

Cited by 3 publications

(1 citation statement)

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“…The Simpson dominance index had a strong negative relationship with soil AP in the control plots because high AP decreases the activity of soil microorganisms and acid phosphatase, which decelerate nutrient cycling, weaken plant nutrient utilization efficiency, and cause a decrease in plant diversity [52,53]. A similar result was found in the plant communities of the Ebinur Lake watershed [54].…”

Section: Mechanism Of Impact Of Soil On Plant Diversitysupporting

confidence: 64%

Impacts of Soil Properties on Species Diversity and Structure in Alternanthera philoxeroides-Invaded and Native Plant Communities

Wu,

Liu,

Zhang

et al. 2024

Plants

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Soil properties can affect plant population dynamics and the coexistence of native and invasive plants, thus potentially affecting community structure and invasion trends. However, the different impacts of soil physicochemical properties on species diversity and structure in native and invaded plant communities remain unclear. In this study, we established a total of 30 Alternanthera philoxeroides-invaded plots and 30 control plots in an area at the geographical boundary between North and South China. We compared the differences in species composition between the invaded and native plant communities, and we then used the methods of regression analysis, redundancy analysis (RDA), and canonical correspondence analysis (CCA) to examine the impacts of soil physicochemical properties on four α-diversity indices and the species distribution of these two types of communities. We found that A. philoxeroides invasion increased the difference between the importance values of dominant plant species, and the invasion coverage had a negative relationship with the soil-available potassium (R2 = 0.135; p = 0.046) and Patrick richness index (R2 = 0.322; p < 0.001). In the native communities, the species diversity was determined with soil chemical properties, the Patrick richness index, the Simpson dominance index, and the Shannon–Wiener diversity index, which all decreased with the increase in soil pH value, available potassium, organic matter, and ammonium nitrogen. However, in the invaded communities, the species diversity was determined by soil physical properties; the Pielou evenness index increased with increasing non-capillary porosity but decreased with increasing capillary porosity. The determinants of species distribution in the native communities were soil porosity and nitrate nitrogen, while the determinants in the invaded communities were soil bulk density and available potassium. In addition, compared with the native communities, the clustering degree of species distribution in the invaded communities intensified. Our study indicates that species diversity and distribution have significant heterogeneous responses to soil physicochemical properties between A. philoxeroides-invaded and native plant communities. Thus, we need to intensify the monitoring of soil properties in invaded habitats and conduct biotic replacement strategies based on the heterogeneous responses of native and invaded communities to effectively prevent the biotic homogenization that is caused by plant invasions under environmental changes.

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Section: Mechanism Of Impact Of Soil On Plant Diversitysupporting

confidence: 64%