School of Resources and Environmental Engineering, Anhui University, Hefei, China.
PLoS One. 2020 Aug 6;15(8):e0230089. doi: 10.1371/journal.pone.0230089. eCollection 2020.
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.
生态化学计量学应纳入管理和受营养影响的生态系统动态，以了解生态系统的状况和生态相互作用。本研究专注于生态化学计量特征的土壤，和叶子，茎，根和不同的大型藻类在圣金湖禁止刺网捕鱼。对于 C、N 和 P 的分析，从叶子、茎、根和土壤中，以探索它们的化学计量比和衍生环境力量，四个主要的植物群落（水蕹菜、菰、菱和苔草）被收集。浓度 C、N、P 和 C:N:P 比在叶子、茎、根和土壤中的植物群落之间差异显著。沿深度梯度高 C:N 测量 C.schmidtii 土壤（7.08±1.504）但没有显著差异（P >0.05）。高 C:P 结果发现 T.natans（81.14±43.88）和 V.natans 土壤（81.40±42.57）分别与无显著差异（P>0.05）。此外，N:P 比测量 V. natans（13.7±4.05）和表现出显著变化（P<0.05）。高叶 C:N 和 N:P 比分别测量 C. schmidtii 和 V. natans。然而，高叶 C:P 比在 Z. latifolia 中测量。从三个研究器官，叶 C:N 和 N:P 比表现出较高的值相比，根和茎。相关分析结果表明，在 0-10cm 土壤有机碳（SOC）与茎总磷（STP）呈负相关，与根总氮（RTN）呈正相关（P<0.05），但与叶总磷（LTP）和叶总氮（LTN）呈正相关（P<0.01）。土壤总氮（STN）在 0-10cm 与叶总磷（LTP）呈强正相关（P<0.01），与 RN:P 和叶总碳（LTC）呈正相关（P<0.05）。土壤基本性质如土壤水分含量（SMC）、体积密度（BD）和 pH 值与土壤生态化学计量特征呈正相关。冗余分析（RDA）结果表明，有效氮（AN）、土壤总氮（STN）和有效磷（AP）是植物化学计量特征的潜在决定变量。
