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The prediction of habitat suitability has important guiding significance for species protection, alien and pest control. In this study, Maxent model was used to predict the suitability habitat of A. molpadioides in Qingchuan Bay, Ningde, Fujian Province. The results of the model reached an excellent level. Combined with ArcGIS software, the suitable habitat of the A. molpadioides was divided into five grades. The results showed that: 1.3% of the total study area was highly suitable, and the area was 25.6 km2. Water environment, sedimentary environment and ecological community all had an impact on the distribution of the A. molpadioides. Water depth, salinity, inorganic nitrogen and active phosphate were the main factors of water environment. The cumulative contribution rate to the prediction of the suitable habitat of A. molpadioides was 39%, especially, the water depth was the most important factor that restricts the distribution of the A. molpadioides, the prediction contribution rate was 27%; sediment grain size, sulfide content and total organic carbon in surface sediment were the main factors of sedimentary environment, and the cumulative contribution rate was 40.4%. The second important factor was the volume percentage of substrate of sediment clay, and the contribution rate was about 18%. The density and biomass of zooplankton and the number of benthos all had a certain impact on the distribution of A. molpadioides, the cumulative contribution rate was 16.8%, among which the contribution rate of zooplankton density to other biological factors was the most important, about 8%. On the whole, the most ideal distribution area of A. molpadioides is the shallow water muddy bottom habitat, where the water depth is less than 5 m, the salinity is relatively low, the organic carbon content of sediment is relatively high, and the bottom material is mainly clay silt.
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| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
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