Research on the ecology and impacts of the zebra mussel (Dreissena polymorpha) has developed in parallel with the long history of their spread across Europe and to North America. There is less scientific knowledge however about the quagga mussel (Dreissena rostriformis bugensis). The recent spread of both zebra and quagga mussels to the Western states of the USA, has spurred on dreissenid research. The 17th International Conference on Aquatic Invasive Species (ICAIS), was held in San Diego, California in September 2010. This special edition of Aquatic Invasions includes topical research presented at ICAIS and also extra subsequent papers on ecology, risk assessment and control of various aquatic invasive species in different parts of the globe.

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It is common to assume that the ancient Greeks and Romans were essentially anthropocentric in point of view. While this is partly true (as it is today), the ancients established important precedents that challenge and overturn this view, anticipating modern science and even Darwin and beyond. This article analyzes texts from the Presocratics to late antiquity to show how the questioning of anthropocentrism developed over roughly 800 years. This matters because overcoming our present ecological crises demands that we reassess our place on the earth and draw down our impact on the planet. The ancients show that the questioning of anthropocentrism it nothing new; their work is part of the bridge required to help us move more responsibly into the later parts of the twenty-first century and beyond.

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