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首页> 外文会议>Australian Weeds Conferences >Seed bank ecology of the invasive vine, cats claw creeper (Macfadyena unguis-cati (L.) A. Gentry)
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Seed bank ecology of the invasive vine, cats claw creeper (Macfadyena unguis-cati (L.) A. Gentry)

机译：种子银行生态的侵入性藤蔓，猫爪爬行者（Macfadyena Unguis-Cati（L.）A. Gentry）

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Cats claw creeper (Macfadyena unguiscati (L.) A.Gentry) is a high impact invasive vine of riparian habitats. This study investigated cats claw creeper seed bank dynamics through in situ sampling in riparian corridors, in conjunction with experiments designed to understand germination requirements, seedling emergence and seed longevity under field conditions. In situ seed densities were low and highly variable, with means ranging from 0-78.6 seeds m~(-2). No significant differences in seed densities between sites, creek corridor locations or seasons were detected in 2003. Germination ranged from 31.7% to 69.2% and was inhibited by a combination of cool temperatures (10/20°C) and continuous dark conditions. Multiple seedlings emerged from more than 40% of seeds, suggesting polyembryony (a form of apomixis). Maximum seedling emergence in field experiments occurred from seeds that were sown on the soil surface. Emergence from the seed bank ceased after 300 days. After 1 year, seed viability was lowestfor seeds buried at 5 cm (0.68%) and greatest for surface sown seeds (12.7%). Our results suggest that cats claw creeper does not have a persistent seed bank. Persistence of infestations following regular control efforts may be largely due to regeneration from the below-ground tuber bank.
机译：猫爪爬行物（MacFadyena unguiscati（L.）A.Gentry）是河岸栖息地的高冲击侵入藤蔓。本研究通过在河岸走廊中原位采样调查了猫爪爬行器种子群体动态，与实际条件下的萌发要求，苗木出苗和种子寿命一起进行了实验。原位种子密度低且变化高，手段范围从0-78.6种子m〜（-2）。在2003年检测地检测到地点之间的种子密度没有显着差异。萌发范围为31.7％至69.2％，并通过冷温度（10/20℃）和连续暗条件的组合来抑制。多种幼苗从超过40％的种子出现，建议聚胺（一种Apomixis）。现场实验中的最大幼苗出苗发生在土壤表面上播种的种子。种子银行的出现在300天后停止。 1年后，种子活力将埋在5厘米（0.68％）和表面播种种子（12.7％）的最大种子。我们的结果表明，猫爪爬行物没有持久的种子库。在定期控制努力之后的侵扰持续性可能主要原理是由于地面块茎库的再生。

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