在希腊,《河流水框架指令》的实施主要基于底栖大型无脊椎动物,并使用带有D框架网的半定量方法,由国际标准化组织认证。在正式采用这种方法之前,在希腊南部(克里特岛)使用了定量铲采样器(“克里特岛”),由于在克里特岛发现的特定河流栖息地,已经实施了近三十年(例如,季节性流量,狭窄的河床,和粗糙的基材)。在这项研究中,我们比较了社区指标,多样性指数,喂养组,运动类型,和生态质量来自使用定时半定量踢样本和同时从同一地点收集的定量铲样本收集的数据。总的来说,从希腊北部和南部收集了20个样本。大多数社区指标,多样性指数,和性状在采样器之间具有可比性。然而,星翅目的相对丰度差异有统计学意义,Plecoptera,和毛翅目,被动过滤器和(半)sessil组,和Pielou的索引。在希腊北部的50%的地点观察到了踢和铲样品之间生态质量的大多数差异,因为铲在捕获活动动物底栖动物方面效果较差。在75%的样本中,克里特岛的生态质量评估与D框架网相当。因此,克里特岛的铲子可以有效地采样克里特岛的溪流,其特点是粗糙,狭窄,湍流,和水文波动的河流栖息地。这种比较可以提高采样效率,并提供更多数据来评估生态质量。
In Greece, the implementation of the Water Framework Directive for rivers is based mainly on benthic macroinvertebrates and uses a semi-quantitative method with a D-frame net, which is certified by the International Organization for Standardization. Before the official adoption of this method, a quantitative shovel sampler (\"Cretan shovel\") was used in southern Greece (Crete), which has been implemented for almost three decades due to the specific river habitats found in Crete (e.g., seasonal flow, narrow riverbeds, and coarse substrates). In this
study, we compared community metrics, diversity indices, feeding groups, locomotion types, and ecological quality derived from data collected using timed semi-quantitative kick samples and quantitative shovel samples collected from the same sites simultaneously. In total, 20 samples from the north and south of Greece were collected. The majority of community metrics, diversity indices, and traits were comparable between samplers. However, there were statistically significant differences in the relative abundance of Ephemeroptera, Plecoptera, and Trichoptera, passive filterers\' and the (semi) sessil groups, and Pielou\'s index. Most differences in the ecological quality between the kick and shovel samples were observed in 50% of the sites in northern Greece because the shovel is less effective at capturing motile zoobenthos. The ecological quality assessment in Crete by the Cretan shovel is comparable with the D-frame net in 75% of the samples. Thus, the Cretan shovel could efficiently sample the Cretan streams, which are characterized by coarse, narrow, turbulent, and hydrologically fluctuating river habitats. Such comparisons could improve sampling effectiveness and make additional data available to assess ecological quality.