Effects of plant species richness on invasion dynamics, disease outbreaks, insect abundances and diversity
Effects of plant species richness on invasion dynamics, disease outbreaks, insect abundances and diversity
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DOI：
10.1046/j.1461-0248.1999.00083.x
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发表时间：
1999-09-01
期刊：
影响因子：
8.8
通讯作者：
Groth, J
中科院分区：
文献类型：
--
作者：
Knops, JMH;Tilman, D;Groth, J
生物多样性下降是人类活动造成的全球变化中最引人注目和不可逆转的方面之一，但人们对这种变化的生态影响知之甚少。最近的研究表明，自养生物或植物等基础物种的生物多样性丧失影响了营养动态和自养生产等基本生态系统过程。生态学理论预测，生态系统底部生物多样性的丧失所引起的变化应该会影响整个系统。在这里，我们表明，实验减少草原植物丰富度增加生态系统的脆弱性入侵的植物物种，提高植物真菌疾病的传播，酸改变昆虫群落的丰富度和结构。这些结果表明，基础物种的丧失可能对生态系统的完整性和功能产生深远的影响。
Declining biodiversity represents one of the most dramatic and irreversible aspects of anthropogenic global change, yet the ecological implications of this change are poorly understood. Recent studies have shown that biodiversity loss of basal species, such as autotrophs or plants, affects fundamental ecosystem processes such as nutrient dynamics and autotrophic production. Ecological theory predicts that changes induced by the loss of biodiversity at the base of an ecosystem should impact the entire system. Here we show that experimental reductions in grassland plant richness increase ecosystem vulnerability to invasions by plant species, enhance the spread of plant fungal diseases, acid alter the richness and structure of insect communities. These results suggest that the loss of basal species may have profound effects on the integrity and functioning of ecosystems.