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Soil Seed Bank Composition of Hui-Sun Experimental Forest Station
|關鍵字:||soil seed bank|
|摘要:||Restricting disturbance and degraded forest habitat recovery has been one of the important ecology resilience tasks. Soil seed bank and forest plantation are the effective rebuilding methods to speed up the degraded forest habitat recovery. As the potential population in plant regeneration, soil seed bank plays a significant role for the vegetation restoration. This study used seed germination to investigate the seed banks in one burned areas, one secondary forest and three types of forest plantation, Taiwania cryptomerioides, Calocedrus formosana and Cunninghamia lanceolata, at the watershed of the third forest compartment in Hui-Sun Experimental Forest Station, and explored the influence of naturalized plants on the soil seed bank. There were 14,752 seeds sprouted in total. There were 36 families, 82 genera and 97 species with average density 10,927 seeds/ m2. Among these, Asteraceae (16 species), Poaceae (11 species), and Cyperaceae (10 species) were the top three families whth more species numbers in the soil seed bank. The forest plantation of Taiwania cryptomerioides had the highest density (23,411 seeds/m^2) followed by Calocedrus formosana forest plantation (11,293 seeds/m^2), burned area (10,563 seeds/m^2), Cunninghamia lanceolata forest plantation (6,467 seeds/m2), and secondary forest (2,904 seeds/m^2). Calocedrus formosana forest plantation had the highest species number (63 species) of the soil seed bank composition, and then Taiwania cryptomerioides (57 species), burned area (51 species), Cunninghamia lanceolata forest plantation (49 species), and secondary forest (47 species). The soil seed bank of forest plantation was mainly composed of herbaceous species while burned area and secondary forest had more shrubs. The top three quantity in the soil seed bank were Torenia flava, Torenia concolor, and Buddleja asiatica, occupied over 50% of the total quantity in soil seed bank. And the main quantities of soil seed bank composition between five vegetation communities were different. However, Trema orientalis is the only tree species of the top ten quantities in the soil seed bank. There was a significant difference in the space distribution of seed bank, and the soil depth and vegetation community influenced the remaining quantity in the soil seed bank. Other than the litter layer, the deeper the soil layer was, the fewer the seeds. Even though the soil seed bank remaining quantity was similar within the vegetation communities, there were still significant differences among the vegetation communities. Burned area had the highest amount of naturalized plants and seed remaining quantity while the soil seed bank in forest plantation hadn't been invaded by naturalized plants. The similarity of the soil seed bank compositions among different forest plantation was comparatively higher, but the similarity of the soil seed bank was lower among forest plantation, burned area and secondary forest. The results showed that the composition of soil seed bank was affected by early-stage vegetation, forest plantation, nurture measures, past and current aboveground vegetation, vegetation succession process, and seed dispersal, etc.|
|Appears in Collections:||第36卷 第02期|
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