Influence of fire, topography, and consumer abundance on seed predation in tallgrass prairie
Influence of fire, topography, and consumer abundance on seed predation in tallgrass prairie
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高草草原火灾、地形和消费者丰度对种子捕食的影响
DOI：
10.1139/z04-126
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发表时间：
2004
影响因子：
1.4
通讯作者：
D. Kaufman
中科院分区：
文献类型：
--
作者：
A. Reed;G. Kaufman;D. Kaufman
我们评估了种子捕食的脊椎动物和无脊椎动物在三个火灾频率的治疗（4年火灾后），并在三个地形位置（高地，石灰石休息，和低地）在tallgrass草原。两种类型的种子托盘，一种用于脊椎动物和一种用于无脊椎动物，在每个夜间和白天期间放置在每个处理中。脊椎动物比无脊椎动物移走了更多的种子。火的频率和地形位置影响了脊椎动物和无脊椎动物的种子去除。无脊椎动物的种子去除的负面影响，火灾，最大的种子去除发生在高地和低地未燃烧的草原。脊椎动物在燃烧过的草原、低地和石灰岩断裂处带走了大部分种子。一天中的时间也影响了脊椎动物的种子去除，因为夜间脊椎动物（假设是啮齿动物）比白天脊椎动物去除更多的种子。然而，啮齿动物的减少并不能准确地预测火灾中种子的去除。
We assessed seed predation by vertebrates and invertebrates in three fire-frequency treatments ( 4 years since fire) and in three topographic positions (upland, limestone breaks, and lowland) in tallgrass prairie. Two types of seed trays, one for vertebrates and one for invertebrates, were placed in each treatment during each nocturnal and diurnal period. Vertebrates removed significantly more seeds than did invertebrates. Fire frequency and topographic position affected seed removal by both vertebrates and invertebrates. Seed removal by invertebrates was influenced negatively by fire; the greatest seed removal occurred in uplands and lowlands in unburned prairie. Vertebrates removed the most seeds in burned prairie and in lowlands and limestone breaks. Time of day also influenced seed removal by vertebrates, as nocturnal vertebrates (assumed to be rodents) removed more seeds than diurnal vertebrates. Abundance of rodents, however, did not predict accurately seed removal in fire tr...