Attributes of Naturally Fallen (Rained) <i>Melaleuca quinquenervia</i>Seeds in Two Habitat Types of South Florida Wetlands
Attributes of Naturally Fallen (Rained) <i>Melaleuca quinquenervia</i>Seeds in Two Habitat Types of South Florida Wetlands作者机构：USDA/ARS Invasive Plant Research Laboratory USA USDA/ARS/WRRC Exotic and Invasive Weeds Research Unit Albany USA
出 版 物：《American Journal of Plant Sciences》 (美国植物学期刊（英文）)
年 卷 期：2017年第8卷第7期
页 面：1659-1671页
学科分类：1002[医学-临床医学] 100214[医学-肿瘤学] 10[医学]
主 题：Exotic Invasive Tree Habitat Seed Germinability Viability Quantity
摘 要：Melaleuca quinquenervia is an Australian tree that has successfully invaded many habitats in Florida. It maintains an aerial seed bank in serotinous capsular fruits held in the tree canopies. These fruits open gradually and shed seeds that fall (rain) throughout the year. Comparative attributes (quantities and qualities) of these fallen seeds from different habitats and tree size categories are unknown. We documented these attributes of fallen M. quinquenervia seeds for 12 months among three tree size categories from each of the two hydrologically delineated habitat types. Quantities (8961 seeds m2·mo-1) and the viability (8.8%) and germinability (8.4%) of fallen melaleuca seeds in the occasionally inundated habitat were significantly higher (P = 0.05) than the quantities (6716 seeds m2·mo-1), and viability (5.6%) and germinability (5.3%) of melaleuca seeds in the permanently inundated habitat. Although relatively more seeds rained from larger trees, higher quality seeds were rained from the trees of smaller dimensions. Smaller trees typically inhabit at the edges of melaleuca stands and hence they may increase the potential for further spread of seeds into the adjacent areas.
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