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In order to further interpret the community structure of nekton and explore the ecological process of community structure changes, community structure of nekton in the Minnan sea area are analyzed based on the niche preemption model (NPM), broken stick model (BSM), overlapping niche model (ONM), dominance pre-emption model (DPM) and random assignment model (RAM) a total of 5 species abundance pattern models. The results show that there are 192 species of nekton in the Minnan sea area, including 132 species of fish, 31 species of crab, 13 species of shrimp, 10 species of cephalopod, 6 species of stomatopod. The fitting effect of NPM in the abundance distribution of nekton is better than that of ONM, the dominant species have dominant position and species niche do not overlap in Minnan sea area. From the open sea to the coastal area, the distribution pattern of nekton abundance changes from DPM to NPM, the simulation result of NPM is worse, and the simulation result of BSM is better, the status of dominant species decreased, the number of species increased, and species abundance distribution tendes to uniform.The fitting effect of DPM on the abundance distribution of nekton is better than that in the deep fishing area. With the increase of latitude, the fitting effect of the abundance distribution of nekton is better gradually, the dominant position of dominant species gradually increased, the number of species become less, and species abundance distribution tendes to unevenness, however, the fitting effect of DPM on the species abundance distribution of nekton in shallow fishing areas is poor, and the dominant position of dominant species gradually declines, the number of species becomes more, and species abundance distribution tendes to uniform. Therefore, niche preemption model is suitable to study the abundance distribution patterns of nekton in the Minnan sea area.
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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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