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首页> 外文期刊>International journal of plant sciences >ARE SEED DISPERSAL AND PREDATION IN FIRE-SENSITIVE PERSOONIA SPECIES (PROTEACEAE) ASSOCIATED WITH RARITY?
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ARE SEED DISPERSAL AND PREDATION IN FIRE-SENSITIVE PERSOONIA SPECIES (PROTEACEAE) ASSOCIATED WITH RARITY?

机译：稀有的火敏感型波斯菊科物种（种子）中的种子分散和繁殖是否存在？

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摘要

Seed dispersal and predation are key processes affecting the colonization and extinction of populations in fire-prone environments. If these processes influence distribution and abundance, rare species may be expected to have less seed removal and/or greater seed predation than common congeners. I compared seed removal and predation under plants in two closely related pairs of fire-sensitive common and rare Persoonia species with fleshy fruits in two replicate populations of each species. Seed removal by macropods was significantly greater in the two common species (>50% seeds/plant) than in their rare congeners (<25%). There was no overall effect of rarity on seed predation by rodents, but there were significantly more seeds of the rare Persoonia mollis subspecies maxima eaten than of the other three species. Plant size was the only attribute measured that was significantly correlated with seed removal (r = 0.50). After including plant size as a covariate in the analysis, I still detected a significant effect of rarity on seed removal. High levels of seed removal were sustained in both small and large populations of the common Persoonia lanceolata, suggesting that population size may not be contributing to the differences between these common and rare species. The common-rare difference in the seed removal of Persoonia species seems robust across several plant and population attributes.
机译：种子的散布和捕食是影响易火环境中种群定居和灭绝的关键过程。如果这些过程影响分布和丰度，那么与普通同类物相比，稀有物种的种子去除率和/或种子捕食性更高。我比较了两种对火敏感的常见和稀有波斯草属物种在植物中的种子去除和捕食，这两对物种对每个物种有两个重复的种群，其肉质果实均带有肉质。在两个常见物种（> 50％种子/植物）中，大脚足类的种子去除率明显高于其稀有同类物（<25％）。稀有性对啮齿动物的种子捕食没有总体影响，但是食用的极少数Persoonia mollis亚种的种子比其他三个物种明显多。植株大小是唯一与种子去除率显着相关的属性（r = 0.50）。在将植物大小作为协变量纳入分析之后，我仍然检测到稀有性对种子去除的显着影响。无论是大型还是小型的轮生Persoonia lanceolata种群，都保持着较高水平的种子去除能力，这表明种群数量可能不会导致这些常见和稀有物种之间的差异。在几种植物和种群属性上，Persoonia物种的种子去除的共同罕见差异似乎很强。

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