Study on Seed Dispersal Modes and Landscape Application Strategies of Spontaneous Plants in Street Tree Planting Ponds: Taking Fuzhou City as an Example

In order to understand the fruit types, seed dispersal modes and diffusion ways of the spontaneous plants in the urban street tree planting ponds, and provide theoretical basis for the construction of sustainable and low-cost urban landscapes and the management and application of spontaneous plants in the future. In this paper, the quadrat survey method was used to investigate the spontaneous plants in the planting ponds of street trees in summer and autumn in Fuzhou City. The fruit types and seed dispersal modes were classified according to the morphological characteristics of the fruits and related literature materials. The results showed that: (1) Fruit types of spontaneous plants in Fuzhou street tree planting pond were diverse, and a total of 19 species were found. From the perspective of invasive plants, non-invasive plants and the plants as a whole, the proportion of dried fruit plants was higher than that of meat fruit, and there were 6 types of seed dispersal mode, mainly animal dispersal; (2) Non-invasive plants include all fruit types, mainly capsules and achene plants, and the characteristics of seed dispersal were similar to the whole. (3) There were a total of 10 fruit types of invasive plant, mainly Asteraceae achene type, and the seed dispersal was mainly wind-driven type, excluding hydraulic dispersal type; (4) From the perspective of seed dispersal, the landscape application strategies of some spontaneous plants in this habitat were discussed.