Photobiology of the giant kelp Macrocystis pyrifera in the land-terminating glacier fjord Yendegaia (Tierra del Fuego): A look into the future?
Photobiology of the giant kelp Macrocystis pyrifera in the land-terminating glacier fjord Yendegaia (Tierra del Fuego): A look into the future?
复制标题
陆地终端冰川峡湾 Yendegaia（火地岛）中巨型海藻 Macrocystis Pyrifera 的光生物学：展望未来？
DOI：
10.1016/j.scitotenv.2020.141810
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发表时间：
2020
期刊：
影响因子：
--
通讯作者：
I. Gómez
中科院分区：
文献类型：
--
作者：
M. Palacios;Dayane Osman;Jaime Ramírez;P. Huovinen;I. Gómez
智利巴塔哥尼亚南部的海峡和峡湾地区拥有巨大的海藻森林(巨囊藻)，这些森林对不同的物理梯度有鲜为人知的特定地点反应。在这项研究中，海带的生物光学、形态和生化特征的功能性，决定了它们的光捕获和驯化，沿着不同的浊度和光条件的梯度，在比格尔海峡的陆地终止的Yendeaia冰川上进行了研究。这些栖息地以冰川消退为标志，由于气候变暖的影响，黄蜂已经成功地在新的地区定居。结果表明，在浊度和光照可利用性的急剧梯度下，海带具有适应遮荫的特性。6至13米水深的藻类的光生物学特征(如光吸收、色素浓度、光化学和叶片光学)与峡湾沿岸的浑浊程度有关。然而，这些种群在纵向剖面上没有表现出明显的叶状体内变异，例如位于不同深度的叶片表现出与盛行光场相对相似的驯化潜力。与营养叶相比，只有基生孢子叶表现出总体差异。此外，细胞内植酸的大量存在反映出酚类(邻氯单宁)的高含量，这表明这些生物在生物化学上可能具有良好的装备，以应对物理条件的变化或草食无脊椎动物(例如海胆)的存在。
The channel and fjord region of southern Chilean Patagonia hosts giant kelp forests (Macrocystis pyrifera) that have little known site-specific responses to diverse physical gradients. In this study, the functionality of the bio-optical, morphological and biochemical features of the kelps, that determine their light trapping and acclimation, were studied along a gradient of varying turbidity and light conditions at the land-terminating glacier of fjord Yendegaia in the Beagle Channel. These habitats are marked by glacial retreat, andM.pyriferahas successfully colonized new areas due to the effects of warming. Results indicated that under a sharp gradient of turbidity and light availability, the kelps have adapted shading characteristics. The photobiological traits (e.g. light absorption, pigment concentration, photochemistry and blade optics) of algae from depths between 6 and 13 m varied in relation to the degree of turbidity along the fjord. However, these populations did not show obvious intra-thallus variation along the longitudinal profile e.g. blades located at different depths showed relatively similar acclimation potential to the prevailing light field. Only basal sporophylls showed general differences in comparison with the vegetative fronds. Otherwise, the high phenolic (phlorotannin) content, which was reflected in the massive presence of intracellular physodes, suggests that these organisms could be biochemically well-equipped to cope with changes in physical conditions or the presence of herbivore invertebrates (e.g. sea urchins).
硝酸盐利用率低造成的压力降低了巨藻巨囊藻对高温的生化适应潜力
影响因子：
5.1
作者：
M. Schmid;P.A. Fernández;J.D. Gaitán-Espitia;P. Virtue;P.P. Leal;A.T. Revill;P.D. Nichols;C.L. Hurd
通讯作者：
C.L. Hurd
影响因子：
30.7
作者：
Smale, Dan A.;Wernberg, Thomas;Moore, Pippa J.
通讯作者：
Moore, Pippa J.