The bigger the better? On sample volume and the representativeness of archaeobotanical data in waterlogged deposits
The bigger the better? On sample volume and the representativeness of archaeobotanical data in waterlogged deposits
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DOI：
10.1016/j.jasrep.2017.02.008
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发表时间：
2017-04-01
影响因子：
1.6
通讯作者：
Jacomet, Stefanie
中科院分区：
文献类型：
--
作者：
Antolin, Ferran;Steiner, Bigna L.;Jacomet, Stefanie
本文提供了一个参考，以估计大尺寸的项目（种子和水果，主要是）在较大和较小的体积在湿地网站的样本的代表性，旨在提出一个最小的样本容量，以恢复这些仍然在代表性的方式。为此，在Parkhaus Opera（苏黎世，瑞士）的湖岸遗址发现的新石器时代晚期定居阶段的近100个样本被子采样成一个更大的子样本（A样本，约100个）。3升体积）和一个较小的子样本（B样本，约0.3体积）。我们比较了大型和小型项目如何在大型和小型子样本的不同部分中表示的基础上的普遍性，浓度和类群之间的比例。大型遗骸（如Prunus spinosa或烧焦的Corylus avellana碎片）和一些中型遗骸（Najas，Aethusa cynapium）更经常出现在较大的子样本中，因此被认为在较小的样本中代表性不足。两组样品的平均浓度值相似（因此相当），但在一对一样品基础上观察到较大差异，发现它们之间无正单调相关性。我们的观察还证明，为了获得数据，是旱地网站的烧焦仍然（包括谷物和大种子野果），大体积样品至少约。3、我需要根据所得结果，重新定义了每个组分中每个分类单元的计数单位。最后，根据我们的观察，提出了一些解释小样本场地中大型项目结果的线索。(C)2017由Elsevier Ltd.出版
This paper provides a reference to estimate the representation of large-sized items (seeds and fruits, mainly) in samples of larger and smaller volume in wetland sites with the aim of proposing a minimum sample size to recover these remains in a representative way. For this, almost 100 samples from a late Neolithic settlement phase found at the lakeshore site of Parkhaus Opera (Zurich, Switzerland) were subsampled into one larger subsample (A-sample, of ca. 3 l of volume) and one smaller subsample (B-sample, of ca. 0.3 l of volume). We compared how large and small-sized itemswere represented in the different fractions of large and small subsamples on the basis of ubiquity, concentration and proportions between the taxa. Large-sized remains (like Prunus spinosa or charred fragments of Corylus avellana) and some medium-sized remains (Najas, Aethusa cynapium) were more often represented in larger subsamples and therefore are considered to be underrepresented in smaller samples. Average concentration values were similar in both groups of samples (and therefore comparable) but large differences were observed on a one-to-one sample basis, finding no positive monotonic correlation between them. Our observations also prove that in order to obtain data that are comparable to dryland sites concerning charred remains (including cereals and large-seeded wild fruits), large volume samples of at least ca. 3 l are needed. Counting units per taxon in each fraction were re-defined on the basis of the results obtained. Finally, some clues to interpret results concerning large-sized items in sites with samples of small volume are also proposed following our observations. (C) 2017 Published by Elsevier Ltd.