Response of Early‐ and Late‐Flowering Plants to Fire Season in Experimental Prairies
Response of Early‐ and Late‐Flowering Plants to Fire Season in Experimental Prairies
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实验草原早花和晚花植物对火灾季节的响应
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发表时间：
1994
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影响因子：
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通讯作者：
H. Howe
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文献类型：
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作者：
H. Howe
火维持着高草草原，但火季作为草原植物区系的形成影响实际上尚未被探索。7月中旬模拟自然草地闪电火灾高峰的重复燃烧，强烈影响了威斯康星州南部实验恢复的物种组成和覆盖。在7月中旬之前开花的多年生植物，在3月烧毁的地块中，未烧毁地块的覆盖度仅为17%，在3月烧毁的地块中覆盖度为6%，而在7月中旬烧毁的地块中覆盖度为46%。在休眠季节焚烧处理的残体中，占主导地位的晚花物种占未烧样地的80%，3月焚烧样地的92%，而7月焚烧样地的仅占47%。采用休眠季节燃烧的管理实践可能会产生与模拟闪电火灾时间的仲夏燃烧所维持的社区完全不同的社区。请参阅JSTOR的全文文章
Fire maintains tallgrass prairies, but fire season is virtually unexplored as a formative influence of prairie floristics. Replicated mid—July burns, simulating the peak of lightning—caused fire in natural grasslands, strongly influenced species composition and cover in experimental restorations in southern Wisconsin. Perennials that flowered before mid—July showed only 17% cover in unburned plots and 6% in plots burned in March, but 46% cover in plots burned in mid—July. Late—flowering species dominating the remnants managed with dormant—season burns accounted for 80% cover in unburned plots and 92% cover in plots burned in March, but only 47% cover in plots burned in July. Management practices that employ dormant—season burns may produce quite different communities than those maintained by midsummer burns that simulate the timing of lightning fires. See full-text article at JSTOR