Figure 4 in Testing soil nematode extraction efficiency using different variations of the Baermann-funnel method

Figure 4. Distribution of nematode c-p classes after extracting nematode with different pre-treatments with the Baermann-funnel method. Principal component analysis (PCA) of the nematode community (family level) as affected by different treatments (sieving with 5 mm mesh size and no sieving, and different amounts of soil [1 cm and 4 cm fresh soil]) prior to extraction reflecting treatment combinations with high (sieving with 5 mm and 1 cm soil), medium (no sieving and 1 cm soil), and lowest (5 mm sieving and 4 cm soil) nematode extraction efficiency in a a) loamy and b) sandy soil. Nematode families were assigned to the five c-p classes according to Bongers (1990) and Bongers & Bongers (1998) with blueish colors indicate r-strategists and reddish colors K-strategists. Numbers in brackets are variation explained by the first (PCA 1) and second (PCA 2) PCA axis, respectively.