Abundance of macrobenthos organisms in the northern Wadden Sea in 2008

At each site we analyse the species occurrence by taking 20 replicate samples of 20x20 cm (20 cm depth).针对每个采样点位，我们通过采集20份20厘米×20厘米（深度20厘米）的重复样本，对物种出现记录进行分析。