Abstract：Abstract: Lichen element compositions are a reliable and effective tool for biomonitoring atmospheric element deposition. The lichen age effect is one of the important factors influencing lichen element concentrations. However, this effect is not fully understood for terricolous fruticose lichens. Herein, samples of a fruticose lichen Stereocaulon alpinum from a remote site of Huzhong Natural Reserve, Greater Khingan Moun-tains of Heilongjiang Province were collected. Fifty-five elements (Ag, Al, As, B, Ba, Be, Bi, Ca, Cd, Ce, Co, Cr, Cs, Cu, Dy, Er, Eu, Fe, Gd, Ge, Hg, Ho, K, La, Li, Lu, Mg, Mn, Mo, Na, Nb, Nd, Ni, P, Pb, Pr, Rb, S, Sb, Sc, Se, Si, Sm, Sn, Sr, Tb, Th, Ti, Tl, Tm, U, V, Y, Yb, and Zn) were measured and their differences among 3 parts (apical, middle, and base parts) of the pseudopodetia were compared in order to examine the effect of different parts of lichen and elements on lichen element accumulations in the uncontaminated ecological environment. The results showed that concentrations of all elements were in the range of the reported background/baseline values, suggesting a low degree of atmospheric element deposition in the study site. Concentrations of most elements with limited metabolic significance were generally the highest at base part, suggesting a continuous bioaccumulation and a low degree of translocation in the lichen thalli. Concentrations of some nutrients showed little differences among the different parts, or were higher in the apical part than in the middle part. These results suggest a nutrient translocation from the older parts to the younger parts of pseudopodetia. Therefore, in lichen biomonitoring studies, specific parts of lichen should be taken into account based on the interested elements, and to ensure the comparability of data among different surveys, the same parts of the thallus should be selected.
引用本文:
吴园园, 高 静, 赵润康, 陈庆芝, 柳燕云, 张佳林, 刘晓迪, 康志娟, 刘爱琴, 刘华杰. 黑龙江呼中自然保护区高山珊瑚枝假果柄不同部位的元素组成[J]. 生命科学研究, 2020, 24(1): 39-46. WU Yuan-yuan, GAO Jing, ZHAO Run-kang, CHEN Qing-zhi, LIU Yan-yun, ZHANG Jia-lin, LIU Xiao-di, KANG Zhi-juan, LIU Ai-qin, LIU Hua-jie. Element Compositions in Different Parts of Pseudopodetia of Stereocaulon alpinum from Huzhong Natural Reserve, Heilongjiang, China. Life Science Research, 2020, 24(1): 39-46.
2020,Vol. 24
