Signs of a cassava field have been found under the several metres of ash that buried a Mayan village when a nearby volcano erupted in about 590 AD. Archaeologists excavating Ceren in San Salvador — dubbed the American Pompeii — found tubular hollows in the solidified ash, formed when the tubers decomposed. This is apparently the earliest evidence of cassava cultivation.
Island cooking
A celebrity chef meets breadfruit in a Hawaiian botanical garden.
Backyard domestication
There’s a “dump heap” hypothesis of agricultural origins which suggests that people first got interested in actively managing and manipulating plants for food or other products when they saw them sprouting out of piles of garbage in and about settlements. There they could observe them daily and experiment with them. A slight variation on this theme — involving corrals in pastoralist campsites rather than garbage dumps — has been proposed for the domestication of quinoa.
One of the things that might have happened in these fertile micro-environments in close proximity to human habitations is that different related species might have been brought accidentally together, leading to hybridization and the development of interesting new — polyploid — types. But there really hasn’t been much empirical evidence for this.
No more. A new paper ((Colin E. Hughes, Rajanikanth Govindarajulu, Ashley Robertson, Denis L. Filer, Stephen A. Harris, and C. Donovan Bailey. Serendipitous backyard hybridization and the origin of crops. PNAS published August 17, 2007, 10.1073/pnas.0702193104.)) looks at the domestication of the legume tree Leucaena in Mexico, where it is grown for food (it is also used as a fodder in some parts of the world). A variety of evidence is discussed which suggests that there has indeed been much hybridization among up to 13 different wild species of Leucaena in Mexican backyards. This has proved “a potent trigger for domestication.” The authors think a similar thing also happened in Mexico with two other perennial crops, Agave and Opuntia.
Ancient chewing gum
Neolithic Finns chewed birch bark tar for fresh breath, clean teeth.
Animal Health for the Environment and Development
We sometimes talk about agricultural biodiversity as if there’s a line that separates it from other kinds of — wild — biodiversity, but of course it doesn’t work like that. There are all kinds of intearactions. For example, diseases can move from wild to domesticated species. Given all the zoonotic diseases that have made the news lately, it seems like it would be sensible to look at human, domestic animal and wildlife health together, rather than in isolation from each other. But apparently such an integrated approach is pretty rare. An initiative of the Wildlife Conservation Society is trying to change all that:
…improving livestock health not only improves human nutrition and incomes, but in the case of zoonotic diseases also contributes directly to improved human health. In addition, healthier domestic animals contribute to securing healthier wildlife (and vice versa), decreasing chances of disease transmission at the livestock/wildlife interface. These cross-sectoral benefits are not all “automatic,” but require that explicit linkages be made between improved food security and health and more sustainable environmental stewardship from the household and community levels on up.