Herre, Edward Allen, Nancy Knowlton, Ulrich Gerhard Mueller, and Stuart A. Rehner. “The evolution of mutualisms: exploring the paths between conflict and cooperation.” Trends in ecology & evolution 14, no. 2 (1999): 49-53.
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Mutualisms are of fundamental importance in all ecosystems but their very existence poses a series of challenging evolutionary questions. Recently, the application of molecular analyses combined with theoretical advances have transformed our understanding of many specific systems, thereby contributing to the possibility of a more general understanding of the factors that influence mutualisms.