Themeda triandra: a keystone grass species
Themeda triandra: a keystone grass species
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Themeda triandra：关键草种
DOI：
10.2989/10220119.2013.831375
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发表时间：
2013
影响因子：
1.4
通讯作者：
K. Kirkman
中科院分区：
文献类型：
--
作者：
H. Snyman;L. Ingram;K. Kirkman
三头草（Themeda triandra）是非洲、澳大利亚和亚洲特有的多年生草丛。在这些地区，它在各种气候、地质基质和生态系统中都有发现。由于它在这些地区分布广泛，因此具有巨大的经济和生态价值，因为在其大部分活动范围内，它是一种相对可口的物种。它对支持本地和引进食草动物的当地种群至关重要，因此对野生动物和牲畜生产以及农村生计至关重要。它是一种重要的顶极或次顶极物种，很好地适应了火，是许多发现它的地区的共同元素。然而，不适当的放牧管理可能导致Themeda的减少，因为它不能很好地适应不间断的选择性放牧制度。草原主题草丰度的下降通常伴随着放牧价值、物种丰富度、覆盖度和生态系统功能的下降。尽管它具有重要的生态和经济意义，但没有人试图回顾和综合对这种草进行的大量研究。我们的目标是总结和综合以前开展的工作，并确定需要进一步研究的领域。
Themeda triandra is a perennial tussock grass endemic to Africa, Australia and Asia. Within these regions it is found across a broad range of climates, geological substrates and ecosystems. Because it is widespread across these areas it has great economic and ecological value, as it is a relatively palatable species across most of its range. It is of critical importance in supporting local populations of both native and introduced herbivores, and is thus central to wildlife and livestock production, and consequently rural livelihoods. It is an important climax or subclimax species that is well adapted to fire, a common element of many areas where it is found. Inappropriate grazing management, however, can result in a decline of Themeda, as it is not well adapted to an uninterrupted, selective grazing regime. A decline in abundance of Themeda in a grassland is usually coupled to a decline in grazing value, species richness, cover and ecosystem function. In spite of its significant ecological and economic importance, there has been no attempt to review and synthesise the considerable body of research undertaken on this grass. Our aim is to summarise and synthesis work previously undertaken and identify areas where further research is required.