Berry genebank the pride of Oregon

There’s a lengthy article in Portland Monthly on the National Clonal Germplasm Repository at Corvallis, a unit within the United States Department of Agriculture’s Agricultural Research Service (USDA/ARS). It focuses on a couple of the people working there in particular, for example strawberry expert Kim Hummer:

Inside one of these greenhouses, diffused winter light streams through the glass ceiling, illuminating horticulturalist Kim Hummer and her colleagues as they hover over a small potted strawberry plant that, considering its history-steeped neighbors, appears undeserving of so much attention. Devoid of fruit, the plant’s heart-shaped leaves are edged brown, its runner pale red. It doesn’t look much different than any one of the other hundreds of strawberry plants crowding dozens of long tables. Yet Hummer’s voice brims with excitement. “This is a wild decaploid,” she says. “It’s very special.”

Want to know the species, which comes from the side of a volcano on Russia’s Iturup Island? Read the whole thing. There’s a lot, lot more.

Why biodiversity matters

Shahid Naeem’s 1 article “Lessons from the Reverse Engineering of Nature” is long, complicated and, in the end, a bit too esoteric for my taste. It also contains a couple of unnecessarily dismissive references to genebanks. But it is worth sticking with for a section which occurs about half way through, and one paragraph in particular.

After describing a number of experiments in which researchers re-created a particular ecosystem, varying only the overall level of biodiversity (this is what he means by reverse engineering nature), Naeem says:

In spite of the limited number of species and tiny numbers of combinations involved, these studies have been stunningly successful at demonstrating that greater diversity means more biomass, more production, greater retention of nutrients, greater resistance to invasive species, greater resistance to the spread of plant pathogens and greater stability.

He goes on to quote a formal meta-analysis, but that succinct summary is definitely worth having to hand the next time someone asks you what species are good for. Naeem is pretty good on the mechanisms too.

Biodiversity loss can affect ecosystem functioning for many reasons, but two keep emerging from the research. First, the more species one removes, the greater the probability that an extraordinarily important species will be lost. But there is a second reason that biodiversity loss reduces ecosystem function: complementarity. The more species you have, the more ways they make use of limited resources such as light, water, nutrients and space.

And what goes for ecosystems goes for agroecosystems, right? Right.

Churros and peaches in the Canyon de Chelly

A discussion on DAD-Net about the identity of a particular goat (or was it sheep?) specimen elicited this wonderful contribution from Carol Snyder Halberstadt, president and cofounder Black Mesa Weavers for Life and Land, Inc.

There is another breed of sheep among which many have have four horns–both ewes and rams, although there are also two-horned and also some without any horns.

These are the rare and endangered Navajo-Churro sheep, which descend from the first domesticated sheep in the Americas. Brought to the Southwest in the 1500s by the Spanish (and brought to Spain possibly by the Moors?) the Iberian churra — an ancient breed that is likely related very closely to the first sheep domesticated in the Near/Middle East about 9,000 years ago — was recognized and welcomed by the Dinè as the promised gift from Etsáanadléhee [Asdzaa nádleehé] (Changing Woman) herself, and developed by them into a unique breed, with a double-coated fleece that produces one of the finest and strongest weaving wools in the world, with glowing whites and an amazing array of natural colors.

Those with four horns, which is a very rare trait among sheep, was one of the characteristics that marked them as sacred to the Dinè.

The Churro have survived several efforts by the U.S. government to drive them to extinction, starting in 1863, when the army was sent to remove the Dinè from their ancestral homeland by slaughtering their Churro, burning their peach orchards, food stocks, and homes, and forcing about 9,000 Dinè on the “Long Walk,” hundreds of miles to Hweeldi (“The Place of Sorrow”), at Fort Sumner, New Mexico, imprisoned there in an internment camp, where thousands died. A few thousand Dinè evaded the U.S. Army and were able to hide with their remnant flocks in remote areas of what is today Arizona and Utah: the Black Mesa region.

In 1868, after four years of suffering, about 3,000 surviving Dinè were allowed to return from Fort Sumner to a portion of their homeland, where they rebuilt their lives, their culture, and their Churro herds.

Not long after, a government-imposed attempt to “improve” the Navajo-Churro forced interbreeding with sheep such as Rambouillet and Merino, further threatening Churro survival and identity,

Nevertheless, by the 1930s, the Churro had increased to more than a million. They were again threatened when stock reductions were ordered (largely the result of restricted grazing regulations that disallowed traditional Navajo grazing practices), citing a need to control overgrazing and erosion. Considered worthless by the government, about a million Churro were slaughtered, their bodies left to rot — a trauma recalled by many Dinè alive today.

By the mid-1970s, the breed was near-extinct, with only about 450 surviving, mainly in the Black Mesa region of Arizona. Today, through the efforts of Dinè and non-Dinè organizations and breeders, there are about 2,000 Navajo-Churro registered nationwide, with an estimated 1,000 in all Dinè Bikéyah (Navajoland). Of these, in the Black Mesa area, some 550-600 Churro continue to form an integral part of the land and Dinè lifeways.

This is a very brief summary. I would be very interested in knowing more about the Uruguay Criollo breed, which might be related to the Churro — since the Spanish introduced their churra to the U.S. Southwest, as well as into Mexico and South America.

There’s a lot to digest in this tragic tale, and a lot more to learn. I want to know, for example, about how it happened that the Dinè (what the Navajo called themselves — it means, as these things often do, The People) recognized this sheep as the gift of Etsáanadléhee. And about how the Dinè and their flocks managed to hide out in Black Mesa. But I’ll just pursue one little, very minor thing here.

The U.S. Army burned the Dinè’s peach orchards. Peach orchards? Where did they get peaches from, and why did they keep orchards? It seems so incongruous somehow. A basically pastoralist, semi-nomadic people planting orchards of exotic fruits? Well, first, it seems clear that peach orchards did indeed exist. They’re mentioned, for example, in a book on Native American “resistance to genocide, ecocide and colonization.” By the mid-1860s, flocks and orchards had been established “over several generations at the bottom of Canyon de Chelly.”

How many trees were there? One source on the Navajo Peach Tree Incident says five thousand, but others three and seven thousand. A lot of trees, anyway:

  • This time, though Carson employed the mercenary Utes over several months until the Navajo were found in the canyon. That’s when he destroyed 5000 peach trees — the pride of the Navajos — and most of their food supplies so that their harsh-winter food stockpile vanished.
  • The Navajo never forgave Carson for what he did to their peach trees.

    Another source, a travel writer visiting the Canyon de Chelly, adds:

    Gabriel hands me a wedge of pottery whose geometric pattern reminds me of mesas. “Made by Hopi,” Gabriel says. The Hopis lived here too, planting the first peach trees in the 1600s, which were later cut down by Carson’s men. When the Navajo returned from the Long Walk, they reconstructed the peach orchards, adding apple and apricot trees.

    And again, more on the Hopi connection from a study of the origins of Navajo pastoralism:

    Life in Canyons de Chelly and del Muerto followed the rhythms of the seasons. In summer, green patches of corn and beans and melons dotted the bottoms, and here and there stood small groves of peach trees, at least some of which had been planted by a Hopi clan that for a time took refuge here.

    So from the Hopi to the Navajo, and traded as dried fruit, but where did all these peach trees come from originally? Spanish missions, perhaps? Following that train of thought took me to a familiar book, Sauer on the Historical Geography of Crop Plants, which confirmed the outlines of the history of the peach in the American southwest that had emerged from all the snippets I’d collected.

    I just had no idea that the Native American tribes of New Mexico had taken up peach cultivation with such fervour. Which of course leads to a whole series of other questions. Foremost among which is: why peaches in particular? But also: are any of these old peaches still around, despite Carson’s best efforts, and do they represent varieties long gone in Europe? After all, the Churro survived…

    Three different ways of looking at Africa

    I ran the Last of the Wild dataset I talked about yesterday past our friend Andy Nelson, he of the accessibility map, and his reaction was that there was a quick paper, or at least an MSc thesis, in comparing that map with his and with the product of the GLOBIO project. Well, here’s what Africa looks like according to the three different methodologies, just to give you a taste. Quite similar, at first look, though we’ll have to wait for that MSc to be sure, I guess. Now, the question is, can such data be used to predict things like the amount of agrobiodiversity in farmers’ fields?
    africa-wild

    africa-time

    africa-globio

    Nibbles: Aphids, Chef wanted, Spanish ham, Obama, Neem

    • “The most closely related aphids were those feeding on the same host species, rather than those from the same geographic area.”
    • “I’m looking for a restaurant chef who would like to spend some time with me, learn something about my garden and the plants I’m growing, and experiment with cooking some dishes and possibly serving them to a small number of customers. ”
    • “It isn’t sustainable, it isn’t very natural, but it tastes great.”
    • Filipinos set up seaweed genebank and nursery.
    • Eat the View: the Story of the White House Garden Campaign.
    • Foreign varieties of cotton and date palms have become a threat to local species here in Upper Sindh. …these varieties are affecting agriculture, forest and environment of Sindh, this threat can be overcome with the plantation of the Neem Tree.”