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The marine ecological disasters occurred frequently in recent years. A large number of floating algae gather in the sea surface and inshore water, which brings serious harm to the economic activities and ecological health of coastal cities. In this study, HY-1C, GF-1 and HJ-1A/1B satellite remote sensing images were used to extract information and divide the growth stages of Sargassum in the South Yellow Sea from April to June in 2016 to 2020, combined with the MODIS sea surface temperature data, photosynthetically active radiation data and sea surface wind data to explore the effects of environmental factors on the temporal and spatial distribution of Sargassum. The results show that: (1) In terms of time, the Sargassum mainly appeared from April to June every year. Sargassum had the largest range of influence in 2017 and smaller in other years. In terms of space, the Sargassum was first detected in the far sea northeast of the Changjiang River Estuary and disappeared in the sea near 35°−36°N. (2) In terms of growth rate, the growth phase of Sargassum could be divided into three stages: “development-outbreak-extinction”. (3) At different growth stages, sea surface temperature and photosynthetically active radiation had different degrees of influence on Sargassum. The larger area of Sargassum in 2017 was mainly influenced by higher sea surface temperature and photosynthetically active radiation. The southeast monsoon promoted the drift of Sargassum from the southeast to the northwest and north. This shows that the spatiotemporal characteristics of Sargassum are affected by a variety of environmental factors.
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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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