- Land‐use history determines ecosystem services and conservation value in tropical agroforestry. Not all agroforests are created equal.
- Temperate agroforestry systems provide greater pollination service than monoculture. No word on land-use history though.
- Machine learning for high-throughput field phenotyping and image processing provides insight into the association of above and below-ground traits in cassava (Manihot esculenta Crantz). Fancy maths helps you estimate root yield from drone images of the canopy of cassava plots.
- A dynastic elite in monumental Neolithic society. Ancient DNA suggests Atlantic megaliths were built to honour incestuous god-kings. But n=1, so there’s that.
- Keeping pace with climate change in global terrestrial protected areas. The representation of climates in protected areas is going to change, with cold and warm climates suffering.
- Network analysis of regional livestock trade in West Africa. It all starts in Burkina Faso.
- Gender and Trait Preferences for Banana Cultivation and Use in Sub-Saharan Africa: A Literature Review. Farmers still prefer traditional cultivars.
- Decoding diversity in the food system: wheat and bread in North America. “Although the dominant trends are toward uniformity, there are also numerous forms of resistance.” Banana farmers available for comment.
- Against the Grain: Long-Term Patterns in Agricultural Production in Prehistoric Cyprus. There was resistance during the agricultural transition too.
- Legacy of Amazonian Dark Earth soils on forest structure and species composition. Forest that was actively managed and farmed in pre-Columbian times is more diverse.
- Evidence of genetic diversity within Solanum Lycopersicum L. ‘Platense’ landrace and identification of various subpopulations. The accessions thus labelled in an Argentinian genebank show a lot of variation.
- Genetic diversity evolution of a sheep breed reintroduced after extinction: Tracing back Christopher Columbus’ first imported sheep. Decolonization in action.
- Simple rules for concise scientific writing. Easier said than done, as all the above confirm.
Exploring Afghanistan’s wheat
There’s a new paper on the geographic distribution of wheat cultivation in Afghanistan. You can explore the data online. But here’s the bottom line, the paper’s Fig. 9.
I downloaded the cultivated wheat data from Genesys and imported everything into QGIS to play around with. That’s almost 5,000 genebank accessions, about half of which are geo-referenced. Here’s the result.
Circles are all cultivated wheats, red dots everything that is not bread wheat. Note the irrigated areas (dark blue) are more likely to have modern varieties, and that the area of rainfed cultivation (bright green) varies considerably from year to year with precipitation. Probably some more collecting to be done then, in particular in the rainfed northwestern region, based on this map. But I’m not going to bet on that until I see whereVIR’s 570-odd Afghan wheats were collected.
Mixed up shook up crops
Nice Twitter thread from Dr Christian Schöb of ETH Zurich summarizing a whole bunch of results from a crop mixture experiment. Do crops have an in-built disadvantage in mixtures? Something else for breeders to think about?
Brainfood: Cover crops, Forest management, Mixtures, Diverse landscapes, Ethiopia and CC, Mapping settlements, Fonio, Peach, Aging seeds, African diversity, Svalbard, Vegetables
- The hidden land use cost of upscaling cover crops. You’d need to devote 4% of the arable maize area of the US to cover crop seed production to have enough cover crop seed for the maize cultivated area. That’s a lot. The answer: better cover crop genetics and agronomy.
- The first rapid forest inventory and resource use assessment of Dashtijum Nature Reserve, Tajikistan: a mixed methods approach. Fancy maths says you need to restrict grazing in these fancy walnut-fruit forests to prevent further degradation.
- Towards intercrop ideotypes: non-random trait assembly can promote overyielding and stability of species proportion in simulated legume-based mixtures. In silico modelling shows that not all mixtures outyield pure stands, but it’s hard to predict which will.
- Fixing our global agricultural system to prevent the next COVID-19. Beyond the land sparing vs sharing dichotomy, to multifunctional landscapes, supported by policies and markets.
- The role of climate in the trend and variability of Ethiopia’s cereal crop yields. Higher temperatures during 1979–2014 correlated with lower yields in much of the high potential area. So, trouble ahead.
- Precise mapping, spatial structure and classification of all the human settlements on Earth. Because they’re there, that’s why.
- Genetic Resources and Varietal Environment of Grown Fonio Millets in West Africa: Challenges and Perspectives. Lots of work to be done by enterprising breeders.
- Genetic Resources, Breeding Programs in China, and Gene Mining of Peach: A Review. Lots of work has been done by enterprising breeders.
- Patterns of mitochondrial DNA fragmentation in bread wheat (Triticum aestivum L.) seeds under ex situ genebank storage and artificial aging. Possible biomarker for seed viability, but differences between natural and artificial aging.
- Ancient genomes reveal complex patterns of population movement, interaction, and replacement in sub-Saharan Africa. Present day hunter-gatherers represent a contraction of a previously widespread human population, which interacted in complex ways with subsequent waves of pastoralists and farmers.
- The past shall not begin: Frozen seeds, extended presents and the politics of reversibility. So Svalbard apparently represents the politics of reversibility made concrete. Literally.
- The Role of Vegetable Genetic Resources in Nutrition Security and Vegetable Breeding. How about reversing the slide of traditional vegetables, eh? Those enterprising breeders needed again.
Chimps shit in the woods
Our friend Alex Chepstow-Lusty and co-authors have another paper out on the forests of Central Africa in the late Holocene. The import of this latest piece of work is that when the forests bounced back 2000 years ago from the fragmentation caused by climate change 500 years before, they did so at least partly thanks to forest animals. As ever with Alex, poo is involved, on this occasion chimp poo. We can thank it for the spread of oil palm across West Africa, it seems. Chimps and others seed poopers may, alas, not be so helpful for the forest’s recovery from the current, anthropogenically caused climate change.
