A method for comparing within-core alpha diversity values from repeated multicorer samplings, shown for abyssal Harpacticoida (Crustacea: Copepoda) from the Angola Basin
A method for comparing within-core alpha diversity values from repeated multicorer samplings, shown for abyssal Harpacticoida (Crustacea: Copepoda) from the Angola Basin
复制标题
一种比较重复多核器采样的核内 α 多样性值的方法，显示了来自安哥拉盆地的深海 Harpacticoida（甲壳类：桡足类）
DOI：
10.1016/j.ode.2004.10.001
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发表时间：
2005
影响因子：
1.6
通讯作者：
H. K. Schminke
中科院分区：
文献类型：
--
作者：
A. Rose;S. Seifried;E. Willen;K. George;G. VEIT;Karin Bröhldick;J. Drewes;G. Moura;P. M. Arbizu;H. K. Schminke
本文介绍了一种方法，用于比较重复取样的多芯取样器台站在选定岩心的α多样性方面的显著差异。这一点在安哥拉盆地的Harpacticoida中得到了证明，这些样本是在2000年RV“Meteor”（M48/1）的DIVA-1活动期间采集的。两个重复采样的多芯站进行了比较，其物种水平的α多样性值的所有成年Harpacticoida在单一的核心。这是通过一个新开发的程序：排名有序的α多样性矩阵的基础上，使用每个物种丰富度，均匀度和优势多样性指数，最小生成树测试（MST测试）进行测试的显着多样性差异之间的重复325（深度：5448米）和346（深度：5389米）。堪培拉度量被用作多芯取样器部署之间的相异性的度量。利用该过程，可以根据对分集的某些方面的期望强调来进行分集指数的组合的任何选择。这种选择的自由，连同可能性，以测试显着的多样性差异，并可视化这个测试，是可取的功能多样性比较所提出的程序。当政治家需要科学家的明确声明时，在保护目的的背景下，测试多样性差异可能是有用的。由于有足够的重复，第一次在两个深海（深度> 2 000米）多芯取样站之间发现了显著的多样性差异。站点346（8个重复）比站点325（7个重复）在harpacticoid物种中的多样性显著更高。区域范围内的粮食供应的差异被认为是重要的不同模式的多样性站325和346。在单芯水平上，种/个体图的回归线斜率接近1（R2=0.990;y=0.877x），表明大部分种都是由单个体代表的，而其余种只有很少的标本。这些数据支持尺度依赖性差异的harpacticoid多样性在安哥拉盆地。本地规模（重复之间）的差异harpacticoid核心内的物种多样性低于区域规模（站之间）的差异。两个站位共发现硬鞭虾科鱼类134种，其中以拟鞭虾科（Pseudotachidiidae）、斑虾科（Argestidae）、短鞭虾科（Ameiridae）和外鞭虾科（Ectinosomatidae）的种类和个体数最多。
A methodology for comparing repeatedly sampled multicorer stations as to significant differences in alpha diversity of selected cores is presented. This is demonstrated for Harpacticoida of the Angola Basin which were sampled during the DIVA-1 campaign of RV “Meteor” in the year 2000 (M48/1). Two replicatedly sampled multicorer stations were compared as to their species-level alpha diversity values of all adult Harpacticoida in single cores. This was done by a newly developed procedure: based on a rank-ordered alpha diversity matrix, using each a species richness, evenness, and dominance diversity index, a minimum spanning tree test (MST-test) was performed to test for significant diversity differences between the replicates of stations 325 (depth: 5448m) and 346 (depth: 5389m). The Canberra Metric was used as a measure of dissimilarity between multicorer deployments. With this procedure, any choice of combination of diversity indices can be made, according to the desired emphasis on certain aspects of diversity. This freedom of choice, together with the possibilities to test for significant diversity differences and to visualize this test, are desirable features of the presented procedure for diversity comparisons. Testing for diversity differences may be useful in the context of conservational purposes when politicians need clear statements from scientists. Due to sufficient replicates, for the first time a significant diversity difference between two abyssal (>2000m depth) multicorer stations was detectable. Station 346 (eight replicates) was significantly more diverse in harpacticoid species than station 325 (seven replicates). Regional-scale differences in food availability are assumed to be of importance for the different patterns of diversity at stations 325 and 346. The slope of the line of regression in a species/individuals plot on single-core level was not far from 1 (R2=0.990;y=0.877x), indicating that most species were represented by singletons and the rest only by very few specimens. The data supported scale-dependent differences of harpacticoid diversity in the Angola Basin. Local-scale (between replicates) differences in harpacticoid within-core species diversity were lower than regional-scale (between stations) differences. At least 134 species of Harpacticoida were found at the two stations, of which the subgroups of Pseudotachidiidae, Argestidae, Ameiridae, and Ectinosomatidae turned out to be richest in species and individuals.