High water, low water

Thanks to the NY Times’ photography blog Lens, two great multimedia presentations for you, both on a watery theme, but with some agrobiodiversity thrown in. From Panos, a moving video of the story of how Tuvaluans are trying — and, alas, mainly failing — to cope with climate change. It’s getting harder and harder to maintain the way of life, including the taro and pulaka gardens, in the face of rising water levels. But the alternative, life in New Zealand, is not appealing to everyone. And from the other side of the world, illustrating the opposite problem, a photoessay on Iraq’s Marsh Arabs, who live by fishing, growing a few crops, and raising buffaloes. But “farmers say lowered water levels and pollution has made it difficult to keep the buffalo healthy.”

Fire and crop wild relatives

As wildfires rage across much of southern Europe, causing death and destruction, it’s sometimes difficult to remember — and perhaps insensitive to mention — that this is in fact a common occurrence, even necessary for the maintenance of vegetation and biodiversity in the Mediterranean.

In the Mediterranean, as in the mediterraneoids, fire occurs where vegetation is flammable. Combustibility is not a misfortune but an adaptation: plants that burn do so because they are fire-adapted. They make fire-promoting resins and other chemicals, or they have structural adaptations, such as producing a loose, airy litter of dead leaves and twigs which dries out and burns. Their ecology involves catching fire from time to time and burning up competitors.

Still, one wonders whether this might be too much of a “good” thing, and whether we’re heading for even more with climate change. What will this mean for particular species, for example crop wild relatives? Do we know how many are fire-adapted? And do we know even for those that are so adapted whether beyond a certain frequency or intensity fire becomes a threat rather than a necessity?

Ex situ redux

After a period in which ex situ conservation has been downplayed by the conservation community (except for agrobiodiversity where it is still the main conservation strategy) ex situ conservation is now widely accepted as an increasingly necessary complement to in situ forms of conservation (IUCN 2002; BGCI 2000), especially protected areas (e.g. Abanades GarcĂ­a & al. 2007).

That’s from a new report for the Council of Europe entitled “The impacts of climate change on plant species in Europe,” prepared by Prof. Vernon Heywood of the School of Biological Sciences, University of Reading, with contributions by Dr Alastair Culham. You’ll find it on p. 39 after a very thorough review of the issues. Nice to see such a bold statement. The report is one of several prepared for the Group of Experts on Biodiversity and Climate Change of the Convention on the Conservation of European Wildlife and Natural Habitats. Thanks to Danny for the tip.

Nibbles: Camel sweets, UG99, British woods, Rice, India and climate change, Soay sheep, Fish, Seed fair, Barn owls, Food maps, Earthworms

Nibbles: Cheese, Dog genetics, Olives on Crete, Polyploidy, Pollination