Ecological and commercial implications of temporal and spatial variability in the composition of pigments and fatty acids in five Irish macroalgae
Ecological and commercial implications of temporal and spatial variability in the composition of pigments and fatty acids in five Irish macroalgae
复制标题
五种爱尔兰大型藻类色素和脂肪酸组成的时间和空间变化的生态和商业影响
DOI：
10.1007/s00227-017-3188-8
复制
发表时间：
2017
期刊：
影响因子：
2.4
通讯作者：
D. B. Stengel
中科院分区：
文献类型：
--
作者：
M. Schmid;Freddy Guihéneuf;D. B. Stengel
海藻生境的特点是不断波动的环境条件，可以影响物种的生化组成。要量化的浓度和组成的色素和脂肪酸的自然变异，从爱尔兰的生态和经济上重要的海藻物种（墨角藻，Ascophyllum nodosum，Himanthalia elongata，海带digitata和Palmaria palmata）的季节和空间分析进行。结果表明，在季节和空间的藻类组成的共同和种特异性模式。一般来说，色素浓度在夏季下降，并与较高的比例叶黄素叶绿素。多不饱和脂肪酸（PUFA）的比例也在夏季下降，观察到类似的反应。总脂肪酸（TFA）的浓度显示两种不同的模式，在五个物种的调查。在这两个岩藻样种，在夏季的TFA的增加与高比例的单不饱和脂肪酸，这意味着积累的存储脂质呈正相关;在其余三个物种中，PUFA的比例最高，在冬季和一般遵循的季节性趋势的TFA。在更大的，地理，规模，结果表明，影响的采样位置上的色素和脂肪酸。结果强调了相互作用的季节，空间和物种特异性驱动程序的复杂性，确定海藻的生化组成，影响其作为食物来源的价值，并应考虑当天然股票收获高价值的商业应用。
Seaweed habitats are characterised by constantly fluctuating environmental conditions which can influence the biochemical composition of species. To quantify the natural variability in concentrations and composition of pigments and fatty acids, a seasonal and spatial analysis of ecologically and economically important seaweed species (Fucus serratus, Ascophyllum nodosum, Himanthalia elongata, Laminaria digitata and Palmaria palmata) from Ireland was undertaken. Results revealed both common and species-specific patterns in seasonal and spatial algal composition. Generally, pigment concentrations decreased during summer months and were associated with a higher ratio of xanthophylls to chlorophylls. A similar response was observed regarding the proportions of polyunsaturated fatty acids (PUFA) which also decreased during summer. Concentrations in total fatty acids (TFA) revealed two distinct patterns in the five species investigated. In the two fucoid species, an increase in TFA during summer months was positively correlated with high proportions of monounsaturated fatty acids, implying an accumulation of storage lipids; in the remaining three species, proportions of PUFA were highest during winter and generally followed the seasonal trends of TFA. On a larger, geographical, scale, results demonstrated an influence of sampling location on pigments and fatty acids. Results highlight the complexity of interacting seasonal, spatial and species-specific drivers determining the biochemical composition of seaweeds which influences their value as food source and should be considered when natural stocks are harvested for high-value commercial applications.