There are several ways to focus on the biodiversity of a place and I’ve tried several in this fieldwork of Siwa oasis.
- The first is to identify all species cultivated in the irrigated cropland of Siwa. The classification used by the local community to order this diversity can be also interesting,
- The second is to take an interest in all these non cultivated plants like weeds, for example, and especially those recognized and named by the local population and often used; o take an interest in all these non domesticated animals like birds, with an inventory of the local avifauna in comparison with the local knowledge,
- The third is take an interest in a species, acknowledged as such by the classificatory botany science, to explore its rich intraspecific diversity: here, it was the study of the different date palm “varieties” or “cultivars”.
The first two approaches are being written.
The third is a research in progress.
The intraspecific diversity of the Siwa date palm (Phoenix dactylifera L.).
This approach required a long fieldwork in Egypt, ethnological work and sampling work (in Siwa, and around Siwa in the desert, in the oases abandoned at present time: see the sampling map below).
This approach has also requested a very long bibliographical work (mainly conducted in New York ) and an interdisciplinary collaboration with colleagues from the Institute of Botany of Montpellier (Université Montpellier II Sciences et Techniques du Languedoc, Centre of Bio-Archaeology and Ecology, UMR 5059).
Samples collected around Siwa were used for different purposes: to feed a PhD thesis on the origins of the date palm with data , also a Master’s thesis on the archaeobotanical tool invented around the date palm seed morphology  and collaborative research.
I designed my work in two stages: the first was to write a (long) article on the agrobiodiversity of the date palm as it is possible to do it from ethnographic and ethnobotanical methods; this was the object of a first publication (in progress The agrobiodiversity of the Date Palm (Phoenix dactylifera L.) in Siwa Oasis (Egypt): between what is said, written, and forgotten) (delayed because Anthropobotanica Journal just disappeared, we expect the relocation of the article in another journal — Mémoires du Muséum national d’histoire naturelle? —; a pre-print version is at least available to download). It was also the object of a lecture (in 2012 at Oxford university, UK). The results are already very interesting.
The second stage of this work is to write down collectively this time an article for Human Ecology journal which can draw some conclusions about theses multidisciplinary expertise around the date palms of Siwa: what can we say about the combination of ethnographies and morphogenetic analyzes? See: The date palm (Phoenix dactylifera L.) in Siwa oasis (Egypt): How ethnographic, morphometric, and genetic analyses together explain the local agrobiodiversity.
Afficher Échantillonnage de dattiers de la région de Siwa (Égypte)/ par Vincent Battesti sur une carte plus grande
- Phoenix dactylifera = Palmier-Dattier.
Redouté, Pierre Joseph, 1759-1840 — artist / Duhamel du Monceau, M., 1700-1782 — Author
Traité des arbres et arbustes que l’on cultive en France en pleine terre, 7 v. [1801-1819]: 498 col. pl. ; 42 cm.
This is not a date palm, Phœnix dactylifera L., unlike the information given by the captation of this beautiful drawing, botany and scholarly-looking: the fruits of the date palm compose clusters of small fruits, its palms are feather-shaped (pinnated leaves) and not fan-shaped (palmed leaves) like on this image, and its stipe (the “trunck”) is never divided.
These features suggest that this is most likely a representation of a doum palm (Hyphaene thebaica (L.) Mart., 1838).