Shrestha M, Lunau K, Dorin A, Schulze B, Bischoff M, Burd M, Dyer A G
School of Media and Communication, RMIT University, Melbourne, Vic., Australia.
Faculty of Information Technology, Monash University, Melbourne, Vic., Australia.
Plant Biol (Stuttg). 2016 Sep;18(5):842-50. doi: 10.1111/plb.12456. Epub 2016 Apr 13.
We studied biotically pollinated angiosperms on Macquarie Island, a remote site in the Southern Ocean with a predominately or exclusively dipteran pollinator fauna, in an effort to understand how flower colour affects community assembly. We compared a distinctive group of cream-green Macquarie Island flowers to the flora of likely source pools of immigrants and to a continental flora from a high latitude in the northern hemisphere. We used both dipteran and hymenopteran colour models and phylogenetically informed analyses to explore the chromatic component of community assembly. The species with cream-green flowers are very restricted in colour space models of both fly vision and bee vision and represent a distinct group that plays a very minor role in other communities. It is unlikely that such a community could form through random immigration from continental source pools. Our findings suggest that fly pollination has imposed a strong ecological filter on Macquarie Island, favouring floral colours that are rare in continental floras. This is one of the strongest demonstrations that plant-pollinator interactions play an important role in plant community assembly. Future work exploring colour choices by dipteran flower visitors would be valuable.
我们研究了麦夸里岛上靠生物传粉的被子植物，该岛位于南大洋的一个偏远地区，其传粉者动物群主要或完全由双翅目昆虫组成，旨在了解花色如何影响群落组装。我们将麦夸里岛上一组独特的奶绿色花朵与可能的移民源植物群以及北半球高纬度地区的大陆植物群进行了比较。我们使用了双翅目和膜翅目的颜色模型以及系统发育信息分析来探究群落组装的色彩成分。在蝇类视觉和蜜蜂视觉的颜色空间模型中，开奶绿色花的物种在颜色方面受到极大限制，它们代表了一个在其他群落中作用极小的独特类群。这样的群落不太可能通过从大陆源植物群随机迁入而形成。我们的研究结果表明，蝇类传粉在麦夸里岛上施加了强大的生态筛选作用，青睐大陆植物群中罕见的花色。这是植物 - 传粉者相互作用在植物群落组装中发挥重要作用的最有力例证之一。未来探索双翅目访花者的颜色选择的工作将很有价值。
