Evolutionary systematics of the Australian Eocyzicus fauna (Crustacea: Branchiopoda: Spinicaudata) reveals hidden diversity and phylogeographic structure
Evolutionary systematics of the Australian Eocyzicus fauna (Crustacea: Branchiopoda: Spinicaudata) reveals hidden diversity and phylogeographic structure
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澳大利亚始环动物群（甲壳类：鳃足纲：刺尾动物）的进化系统学揭示了隐藏的多样性和系统发育地理学结构
DOI：
10.1111/jzs.12038
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发表时间：
2014
影响因子：
1.9
通讯作者：
Richter
中科院分区：
文献类型：
--
作者：
Schwentner;Richter
虽然“大型鳃足类动物”是一个重要的动物区系元素的临时水体在澳大利亚的广大（半）干旱地区，他们的多样性，分布和生态知识仍然很差。在此，基于一个线粒体标记（细胞色素氧化酶亚基I（COI））和三个核标记（EF 1 α、ITS 2和28 S），我们提供了与澳大利亚东部和中部Eocyzicus（Spinicaudata）动物群的多样性和地理分布相关的新数据。结合系统发育分析、单倍型网络分析和COI条形码分析，将312个个体分为11个主要谱系。为了推断这些谱系是否在生殖上相互隔离（根据生物学或亨尼纪物种概念进行物种划分的先决条件），对一个样本子集进行了每个核标记物的单独分析。虽然在一个核标记物的分析中，一些谱系是非单系的，但这主要归因于诸如不完全谱系分选的过程，而不是正在进行的繁殖。这11个谱系转化为至少7个物种，它们的生殖隔离还表明了同域性，包括前面描述的两个AustralianEocyzicusspecies。另外三个谱系可能构成更多的物种，但它们明显的异地分布使生殖隔离的检验不适用。一个谱系似乎不是生殖隔离的，因此被认为是其他物种中的一个遗传上不同的谱系，而E. argillaquus中的一个分歧谱系可能构成另一个物种。虽然同域现象非常普遍，例如在澳大利亚东部的帕鲁河流域中部就有六种，但同域现象却很罕见。这是可能的，不同的栖息地偏好和优先级的影响相结合，抑制了每个水体中存在一个以上的Eocyzicusspecies。在澳大利亚东部和中部（例如墨累-达令盆地、布洛河流域和东部和北方爱湖盆地; LEB）发现的某些种群之间几乎没有遗传分化，这表明在这一大片区域内的扩散率很高。然而，在澳大利亚中部种群之间（例如居住在中部和西部LEB的种群），遗传分化是明显的，这可能是由于缺乏丰富的重要传播媒介（水生鸟类）和该地区适宜栖息地的多样性和密度较低。最突出的地理间断存在于澳大利亚东北部（LEB东北部），与任何其他研究区域都没有共享物种。
Although ‘large branchiopods’ are an important faunal element of the temporary water bodies in Australia's vast (semi)arid regions, knowledge of their diversity, distribution and ecology is still poor. Here, on the basis of one mitochondrial [cytochrome oxidase subunit I (COI)] and three nuclear (EF1α, ITS2 and 28S) markers, we present new data relating to the diversity and phylogeography of eastern and central AustralianEocyzicus(Spinicaudata) fauna. Using a combination of phylogenetic, haplotype network and DNA barcoding analyses of COI, 312 individuals were grouped into eleven main lineages. To infer whether these lineages are reproductively isolated from each other (the prerequisite for species delineation according to the Biological or Hennigian Species Concepts), separate analyses of each nuclear marker were performed on a subset of specimens. Although some lineages are non‐monophyletic in the analysis of one nuclear marker, this is mostly attributed to processes such as incomplete lineage sorting rather than ongoing reproduction. The eleven lineages translate into at least seven species whose reproductive isolation is additionally indicated by sympatry, including both AustralianEocyzicusspecies previously described. Another three lineages may constitute further species, but their clear allopatric distribution rendered the test for reproductive isolation inapplicable. One lineage appears not to be reproductively isolated and is therefore considered a genetically distinct lineage within one of the other species, and one divergent lineage withinE. argillaquusmay constitute an additional species. Although sympatry is very common – six species occur in the central Paroo River catchment in eastern Australia, for instance – syntopic occurrence is rare. It is possible that a combination of differing habitat preferences and priority effects inhibits the presence of more than oneEocyzicusspecies per water body. There is little to no genetic differentiation between certain populations of the species found in eastern and central Australia (e.g. the Murray–Darling Basin, the Bulloo River catchment and the eastern and northern Lake Eyre Basin; LEB), suggesting high dispersal rates within this large area. Between the central Australian populations themselves, however (e.g. those inhabiting the central and western LEB), genetic differentiation is pronounced, probably as a result of the lack of abundance of important dispersal vectors (aquatic birds) and the lower diversity and density of suitable habitats in the area. The most prominent biogeographical break exists towards north‐eastern Australia (north‐east LEB), which does not share species with any other region studied.
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影响因子：
2.6
作者：
Schwentner;Richter
通讯作者：
Richter
临时淡水池中的群落结构：理清栖息地大小和水文状况的影响
影响因子：
2.7
作者：
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影响因子：
2.7
作者：
T. Nhiwatiwa;L. Brendonck;A. Waterkeyn;B. Vanschoenwinkel
通讯作者：
B. Vanschoenwinkel
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影响因子：
0.6
作者：
B. Timms
通讯作者：
B. Timms
影响因子：
1.3
作者：
R. Mayden
通讯作者：
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