Myrtaceae pollen morphology study from Bass Strait islands, Australia, is effective in separating region-specific fossil Myrtaceae pollen types
Myrtaceae pollen morphology study from Bass Strait islands, Australia, is effective in separating region-specific fossil Myrtaceae pollen types
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DOI：
10.1016/j.revpalbo.2020.104273
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发表时间：
2020-10-01
影响因子：
1.9
通讯作者：
Haberle, Simon Graeme
中科院分区：
文献类型：
--
作者：
Adeleye, Matthew Adesanya;Hopf, Felicitas Viktoria Luise;Haberle, Simon Graeme
桃金娘科植物花粉形态的相似性，使其在化石记录中的种级鉴定成为孢粉学研究的一个难题。在这里，我们提出了一个花粉形态学研究的桃金娘科物种发现在澳大利亚东南部的一个特定区域，在巴斯海峡的Furneaux集团的岛屿，并将其应用于化石花粉记录从同一地区，以确认其效用在区分桃金娘科花粉的类型水平。我们检查了桃金娘科的23种，属于6属，并能够识别11个不同的类型。所观察到的桃金娘科花粉类群可以放心地分离到属的水平，除了Euryomyrtus，这是难以区分的Leptospermum。具体而言，在白千层属以及Kunzea和Calylacea内最容易实现物种水平的分离，它们各自由单一物种代表。相反，桉树只能分为主要类型，而薄子树属物种无法明确区分，尽管外壁图案存在差异。我们还表明，我们的花粉形态类型可以适用于全新世和更新世的化石记录从Furneaux组。我们建议，研究一个特定地区的桃金娘科是更有助于确定化石桃金娘科花粉从该地区比使用一般桃金娘科花粉形态描述或关键是不是网站或区域特定的。(C)2020 Elsevier B.V.保留所有权利。
The identification of Myrtaceae pollen to species level in fossil records has challenged palynologists due to the similarity of pollen grains produced by species in this family. Here, we present a pollen morphological study of the Myrtaceae species found in a specific region of southeastern Australia, the islands of the Furneaux Group in Bass Strait, and apply this to fossil pollen records from the same region to confirm its utility in differentiating Myrtaceae pollen to type level. We examined 23 species of Myrtaceae, belonging to 6 genera, and were able to identify 11 distinct types. The observed Myrtaceae pollen taxa can be confidently separated to genus level, apart from Euryomyrtus, which is indistinguishable from Leptospermum. Specifically, separation to species level is most achievable within the genus Melaleuca, as well as Kunzea and Calytrix, which are each represented by a single species. Conversely, Eucalyptus could only be separated into major types, while Leptospermum species could not be clearly separated, although differences in exine patterns exist. We also demonstrate that our pollen morphological types can be applied to Holocene and Pleistocene fossil records from the Furneaux Group. We recommend that studying the Myrtaceae of a specific area is more helpful in identifying fossil Myrtaceae pollen from that area than using general Myrtaceae pollen morphological descriptions or keys that are not site- or region-specific. (C) 2020 Elsevier B.V. All rights reserved.