This study aimed to compare the efficiency of two different sizes of the Surber sampler to assess benthic macroinvertebrates in headwater streams in two Amazonian regions. Two Surber samplers of different sizes were used, one measuring 20 × 20 cm and the other 30 × 30 cm, both with a 0.25-mm net. The number of replicates taken was 6 for the smaller sampler and 3 for the bigger one, maintaining approximately the same total sampled area. The study was carried out in 12 headwater streams with different environmental conditions. Biological metrics were calculated for each size at each site and compared within each stream health category. A two-way analysis of similarities test was performed to compare the community structure assessed by each method at each stream. A normalized sampling effort was used to quantify the number of samples required to correctly sample each site. The data did not show a significant difference between the two sizes regarding the taxonomic recruitment and the community structure sampled at each stream, but differences were found between the two sizes in dominance values and in Shannon index scores for the natural sites. Furthermore, the smaller Surber was able to assess 70% of the estimated richness in all sites, which suggests that it is better to assess benthic macroinvertebrates than the larger Surber. Moreover, the smaller Surber is easier to transport in the field, reducing the effort of the technician, and takes less time to sort the material collected with it, which can reduce the sample processing effort, therefore reducing the cost of the project.

这项研究旨在比较两种不同尺寸的Surber采样器评估两个亚马逊地区上游水域底栖大型无脊椎动物的效率。使用了两个不同尺寸的Surber采样器，一个采样器的尺寸为20×20 cm，另一个采样器的尺寸为30×30 cm，两者的净值为0.25 mm。对于较小的采样器，重复次数为6，对于较大的采样器，重复次数为3，并保持大约相同的总采样面积。该研究是在具有不同环境条件的12种源头溪流中进行的。针对每个站点的每个大小计算生物学指标，并在每个流健康类别中进行比较。进行了相似度分析的双向分析，以比较每种方法在每个流中评估的社区结构。使用标准化的采样工作量来量化正确采样每个位置所需的采样数量。数据并未显示在分类分类募集和在每个流中采样的社区结构这两个大小之间的显着差异，但是在自然位置的优势值和香农指数得分中发现了这两个大小之间的差异。此外，较小的Surber能够评估所有地点估计的丰富度的70％，这表明与较大的Surber相比，评估底栖大型无脊椎动物更好。而且，较小的Surber易于在现场运输，从而减少了技术人员的工作量，并且花费较少的时间对收集的材料进行分类，这可以减少样品处理的工作量，从而降低了项目成本。数据并未显示在分类分类募集和在每个流中采样的社区结构这两个大小之间的显着差异，但是在自然位置的优势值和香农指数得分中发现了这两个大小之间的差异。此外，较小的Surber能够评估所有地点估计的丰富度的70％，这表明与较大的Surber相比，评估底栖大型无脊椎动物更好。而且，较小的Surber易于在现场运输，从而减少了技术人员的工作量，并且花费较少的时间对收集的材料进行分类，这可以减少样品处理的工作量，从而降低了项目成本。数据并未显示在分类分类募集和在每个流中采样的社区结构这两个大小之间的显着差异，但是在自然位置的优势值和香农指数得分中发现了这两个大小之间的差异。此外，较小的Surber能够评估所有地点估计的丰富度的70％，这表明与较大的Surber相比，评估底栖大型无脊椎动物更好。而且，较小的Surber易于在现场运输，从而减少了技术人员的工作量，并且花费较少的时间对收集的材料进行分类，这可以减少样品处理的工作量，从而降低了项目成本。