首页> 美国卫生研究院文献>BMC Ecology >Effects of fire and fire intensity on the germination and establishment of Acacia karroo Acacia nilotica Acacia luederitzii and Dichrostachys cinerea in the field
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Effects of fire and fire intensity on the germination and establishment of Acacia karroo Acacia nilotica Acacia luederitzii and Dichrostachys cinerea in the field

机译:火势和火势对野外相思karroo尼古拉相思卢氏相思和灰黄刺柏萌发和定殖的影响

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摘要

BackgroundWhile fire has been used in some instances to control the increase of woody plants, it has also been reported that fire may cause an increase in certain fire-tolerant Acacia tree species. This study investigated germination of Acacia karroo, A. luederitzii and Dichrostachys cinerea, thought to be increasing in density, as well as the historically successful encroaching woody species, A. nilotica, in savanna grassland, Hluhluwe-iMfolozi Park, South Africa. A. karroo is thought to be replacing A. nilotica as the dominant microphyllous species in the park. We tested the hypothesis that observed increases in certain woody plants in a savanna were related to seed germination and seedling establishment. Germination is compared among species for burnt and unburnt seeds on burnt and unburnt plots at three different locations for both hot and cool fires.
机译:背景技术虽然在某些情况下使用火势来控制木本植物的生长,但也有报道称,火势可能导致某些耐火的金合欢树种的增长。这项研究调查了阿拉伯树胶(Acacia karroo),拟南芥(A. luederitzii)和灰棘金(Dichrostachys cinerea)的发芽率,认为它们的密度正在增加,并且在南非Hluhluwe-iMfolozi公园的热带稀树草原上,成功地入侵了木本物种Nilotica。人们认为karroo代替了Nilotica,成为公园中主要的小种。我们检验了以下假设:观察到热带稀树草原中某些木本植物的生长与种子发芽和幼苗生长有关。比较了在三个不同位置的热火和凉火的燃烧区和未燃烧区的不同种子的发芽情况。

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