Research Abstract


Assembly of complex plant–fungus networks

2014年10月20日 Nature Communications 5 : 5273 doi: 10.1038/ncomms6273


東樹 宏和1, Paulo R. Guimarães2, Jens M. Olesen3 & John N. Thompson4

  1. 京都大学大学院 人間・環境学研究科
  2. サンパウロ大学(ブラジル)
  3. オルフス大学(デンマーク)
  4. カリフォルニア大学 サンタクルーズ校(アメリカ)
Species in ecological communities build complex webs of interaction. Although revealing the architecture of these networks is fundamental to understanding ecological and evolutionary dynamics in nature, it has been difficult to characterize the structure of most species-rich ecological systems. By overcoming this limitation through next-generation sequencing technology, we herein uncover the network architecture of below-ground plant–fungus symbioses, which are ubiquitous to terrestrial ecosystems. The examined symbiotic network of a temperate forest in Japan includes 33 plant species and 387 functionally and phylogenetically diverse fungal taxa, and the overall network architecture differs fundamentally from that of other ecological networks. In contrast to results for other ecological networks and theoretical predictions for symbiotic networks, the plant–fungus network shows moderate or relatively low levels of interaction specialization and modularity and an unusual pattern of ‘nested’ network architecture. These results suggest that species-rich ecological networks are more architecturally diverse than previously recognized.