Fig. 2From: Earthworms facilitated pepper (Capsicum annuum L.) growth via enhancing the population and function of arbuscular mycorrhizal fungi in a low-density polyethylene-contaminated soilThe observed richness (A), Shannon index (B), Simpson's index (C), Pielou's evenness (D) of soil arbuscular mycorrhizal (AM) fungal community. -E, non-inoculation of earthworm; + E, inoculation of earthworm. Data are means with standard deviation (n = 4). Different letters indicate significant difference (p < 0.05)Back to article page