Sánchez-Rodríguez I, Huerta-Diaz M A, Choumiline E, Holguín-Quiñones O, Zertuche-González J A
Centro Interdisciplinario de Ciencias Marinas, CICIM AR-IPN, La Paz, BCS, Mexico.
Environ Pollut. 2001;114(2):145-60. doi: 10.1016/s0269-7491(00)00223-2.
Concentration levels of 21 elements were analyzed by instrumental neutron activation analysis (Rb, Cs, Ca, Sr, Ba, Sc, Cr, Fe, Co, Ni, Zn, Se, As, Sb, Th, U, Br, Hf, Ta, Zr, and Ag) in seven different seaweed species (Codium cuneatum, Sargassum sinicola, Padina durvillaei, Laurencia johnstonii, L. papillosa, Gracilaria pachidermatica and Hypnea pannosa), collected in a shallow coastal zone from Bahia de Loreto, Baja California Sur, Mexico. Measured concentrations in algal tissue spanned almost eight orders of magnitude (from 2.0 x 10(-3) microg g(-1) for Hf to 1.2 x 10(5) microg g(-1) for Ca). Ca was consistently the most abundant element in all analyzed seaweeds, followed by Fe and Sr. Brown algae showed a tendency to incorporate higher concentrations of elements than red and green algae. Additionally, there were significant linear correlations (P < 0.05 to P < 0.001) between a total of 76 different pairs of elements, some of them (e.g. Rb-Ni, Rb-Ag, Sc Cr, Sc-Fe, Sc Ni, Sc Hf, Cr Fe, Fe Ni, Fe-Hf and Ni-Th) highly correlated (r2 > 0.900). A significant correlation (r2 = 0.701, n = 18, P < 0.001) exists between our measurements in the tissue of algae and their corresponding average elemental concentrations in oceanic water from the North Pacific Ocean. Hence, overall elemental abundance in algal tissue apparently is controlled by the elemental abundance in oceanic water, whereas metabolic processes as well as environmental factors relevant to each region modify the final concentration of a given element in the body of a macroalgae.
采用仪器中子活化分析法（Rb、Cs、Ca、Sr、Ba、Sc、Cr、Fe、Co、Ni、Zn、Se、As、Sb、Th、U、Br、Hf、Ta、Zr和Ag）分析了从墨西哥南下加利福尼亚州洛雷托湾浅海沿岸采集的7种不同海藻（楔形仙掌藻、中华马尾藻、硬叶团扇藻、约翰斯顿凹顶藻、乳头凹顶藻、厚皮江蓠和松节藻）中21种元素的浓度水平。藻类组织中的测量浓度跨度近8个数量级（从Hf的2.0×10⁻³ μg g⁻¹到Ca的1.2×10⁵ μg g⁻¹）。Ca始终是所有分析海藻中含量最丰富的元素，其次是Fe和Sr。褐藻比红藻和绿藻有吸收更高浓度元素的趋势。此外，总共76对不同元素之间存在显著的线性相关性（P<0.05至P<0.001），其中一些元素（如Rb-Ni、Rb-Ag、Sc-Cr、Sc-Fe、Sc-Ni、Sc-Hf、Cr-Fe、Fe-Ni、Fe-Hf和Ni-Th）高度相关（r²>0.900）。藻类组织中的测量值与北太平洋海水中相应的平均元素浓度之间存在显著相关性（r² = 0.701，n = 18，P < 0.001）。因此，藻类组织中的总体元素丰度显然受海水中元素丰度的控制，而代谢过程以及与每个区域相关的环境因素会改变大型海藻体内特定元素的最终浓度。
