Ecological stoichiometric characteristics of Carbon (C), Nitrogen (N) and Phosphorus (P) in leaf, root, stem, and soil in four wetland plants communities in Shengjin Lake, China

Abstract

Ecological stoichiometric should be incorporated into management and nutrient impacted ecosystems dynamic to understand the status of ecosystems and ecological interaction. The present study focused on ecological stoichiometric characteristics of soil, and leaves, stems, and roots of different macrophytes after the banning of seine fishing in Shengjin Lake. For C, N, and P analysis from leaves, stems, roots, and soil to explore their stoichiometric ratio and deriving environmental forces, four dominant plant communities (Vallisneria natans, Zizania latifolia, Trapa natans and Carex schmidtii) were collected. The concentration of C, N, P and C: N: P ratio in leaves, stems, roots, and soil among the plant communities varied significantly. Along the depth gradient high C: N was measured in C.schmidtii soil (7.08±1.504) but not vary significantly (P >0.05). High C: P result was found in T.natans (81.14±43.88) and in V.natans soil (81.40±42.57) respectively with no significant difference (p>0.05). Besides, N: P ratio measured high in V. natans (13.7±4.05) and showed significant variation (P<0.05). High leaf C: N and N: P ratio was measured in C. schmidtii and V. natans respectively. Nevertheless, high leaf C: P ratio was measured in Z. latifolia. From the three studied organs, leaf C: N and N: P ratio showed high values compared to root and stems. The correlation analysis result showed that at 0-10cm depth soil organic carbon (SOC) correlated negatively with stem total phosphorus (STP), and root total nitrogen (RTN) (P<0.05) but positively strongly with leaf total phosphorus (LTP) and leaf total nitrogen (LTN) (P<0.01) respectively. Soil total nitrogen (STN) at 0-10cm strongly positively correlated with leaf total phosphorus (LTP) (P<0.01) and positively with RN: P and leaf total carbon (LTC) (P<0.05). Soil basic properties such as soil moisture content (SMC), bulky density (BD) and pH positively correlated with soil ecological stoichiometric characteristics. Redundancy analysis (RDA) result showed available nitrogen (AN), soil total nitrogen (STN), and available phosphorus (AP) were the potential determinants variables on plants stoichiometric characteristics.

Responses of Ecological Stoichiometric Characteristics of Carbon, Nitrogen, and Phosphorus to Periodic Submergence in Mega-Reservoir: Growth of Taxodium distichum and Taxodium ascendens

“…Plant ecological stoichiometry has been widely used in the study of plant adaptation mechanisms and nutrition strategies under stressed environments, mainly including the characteristics of biological nutrient allocation, cycle, supply, and demand in the forest [18], desert [19], grassland [20], and wetland [17,21], as well as their relationship with habitat. In addition, studies on the ecological stoichiometry characteristics of plants in different ecosystem types have been carried out at the global [22,23], national [16], and regional [24] scales, which further promote the development of ecological stoichiometry.…”

Effects of drought and salt stress on seed germination and seedling growth of Elymus nutans

“…Drought stress and salt stress alter the C, N, and P contents of plant leaves, and the changes in plant leaf and root morphology are particularly pronounced ( Zhou et al, 2022 ; Dibar et al, 2020 ).…”

Intestinal Microbes of Hooded Cranes (Grus monacha) Wintering in Three Lakes of the Middle and Lower Yangtze River Floodplain

“…On the other hand, large-scale reclamation of farmland has degraded the wetland area of Caizi Lake and the Hooded Cranes at Caizi Lake began to mainly eat O. sativa at the farmland [ 25 ]. On the contrary, in recent years, Shengjin Lake has been implemented many effective wetland protection and management measures, including wetland vegetation restoration and banning of seine fishing [ 48 , 49 ]. Therefore, the wetland of Shengjin Lake has remained well protected, and the food resources of the Hooded Cranes are better guaranteed.…”