IBM developerWorks Ecosystem of Communities is written on a wiki. This paper was presented at IBM Innovate in June 2013, but has not been formally published in white paper format.
Much has been written about the management of online communities, but rather less about the management of ecosystems of connected communities.
Each group has a purpose, each group has a membership and each group has a real world analog of its digital presence.
Online communities typically draw their members from a geographically diverse population. Sometimes this is restricted to a single organization, and sometimes it is open for anyone to join. An ecosystem of communities supports a population that has a range of interests and needs.
Supporting this ecosystem of communities can be considered Community Management as a Service.