Juvenile morphology of the large Antarctic canopy-forming brown alga, Desmarestia menziesii J. Agardh

Juvenile morphology of the large Antarctic canopy-forming brown alga, Desmarestia menziesii J. Agardh
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大型南极冠层形成褐藻 Desmarestia menziesii J. Agardh 的幼年形态

DOI:
10.1007/s00300-019-02584-3
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发表时间:
2019
期刊:
影响因子:
1.7
通讯作者:
Peters, Akira F.
Peters, Akira F.
中科院分区:
环境科学与生态学3区
文献类型:
--
作者:
Küpper, Frithjof C.;Amsler, Charles D.;Morley, Simon;de Reviers, Bruno;Reichardt, Aurelia;Peck, Lloyd S.;Peters, Akira F.

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对于极地地区的许多类型的海藻,关于它们的生命周期如何有助于它们对极端非生物环境的整体适应,仍然存在悬而未决的问题。这尤其适用于南极半岛大部分地区的主要树冠形成褐藻属desmarestia,这里进行了研究。2017年12月至2018年2月期间,在罗瑟拉研究站(南极洲阿德莱德岛)周围进行的潜水调查显示,迄今为止未知的desmarestiasp生命形式广泛存在。柔软的,羽毛状的进一步的研究探索了这是否可能是(1)一种新的、迄今未被描述的desmarestia种;(2)一种已知的desmarestia种在该地区的新记录;或(3)该地区记录的一种迄今未知的物种的生命形式。收集后提取了pcr友好的DNA,并对ITS1进行了测序,结果明确表明这些样本属于desmarestia menziesii,这是目前在阿德莱德岛/玛格丽特湾地区记录的唯一desmarestia种。幼年形态的存在随后在d的大部分自然范围内得到证实。2019年沿着南极半岛西部进行的巡航潜水调查,以及1989年在安弗斯岛的收集。因此,我们的藏品构成了其少年形态,这是以前没有记录在文献中。在分类学和生态学的背景下讨论了极地海藻的广泛意义。
For many types of seaweeds in Polar Regions, open questions remain about how their life cycle contributes to their overall adaptation to the extreme abiotic environment. This applies in particular to the major canopy-forming brown algae in much of the Antarctic Peninsula of the genusDesmarestia, which was investigated here. Diving surveys around Rothera Research Station (Adelaide Island, Antarctica) during December 2017–February 2018 revealed the widespread presence of a hitherto-unknown life form ofDesmarestiasp. of a tender, feather-like morphology. Further studies explored whether this could be (1) a new, hitherto undescribedDesmarestiaspecies (2) a new record for the region of a knownDesmarestiaspecies previously recorded elsewhere or (3) a so-far unknown life form of a species recorded for the region. Collections enabled the extraction of PCR-friendly DNA and sequencing of ITS1, which unambiguously showed that the samples belonged toDesmarestia menziesii, the onlyDesmarestiaspecies presently recorded for the Adelaide Island/Marguerite Bay region. The presence of the juvenile morphology was subsequently confirmed throughout much of the natural range ofD. menziesiiduring cruise-based diving surveys along the Western Antarctic Peninsula in 2019 and from collections at Anvers Island in 1989. Our collections thus constitute its juvenile morphology, which is not previously documented in the literature. The wider significance for the Polar seaweeds is discussed in the context of Taxonomy and Ecology.
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