Swedish University of Agricultural Sciences

About: Swedish University of Agricultural Sciences is a education organization based out in Uppsala, Sweden. It is known for research contribution in the topics: Population & Soil water. The organization has 13510 authors who have published 35241 publications receiving 1414458 citations. The organization is also known as: Sveriges Lantbruksuniversitet & SLU.

Rapid hybrid speciation in Darwin's finches.

Abstract: Homoploid hybrid speciation in animals has been inferred frequently from patterns of variation, but few examples have withstood critical scrutiny. Here we report a directly documented example, from its origin to reproductive isolation. An immigrant Darwin’s finch to Daphne Major in the Galapagos archipelago initiated a new genetic lineage by breeding with a resident finch ( Geospiza fortis ). Genome sequencing of the immigrant identified it as a G. conirostris male that originated on Espanola >100 kilometers from Daphne Major. From the second generation onward, the lineage bred endogamously and, despite intense inbreeding, was ecologically successful and showed transgressive segregation of bill morphology. This example shows that reproductive isolation, which typically develops over hundreds of generations, can be established in only three.

Organic carbon decomposition rates controlled by water retention time across inland waters

Abstract: Organic carbon decays as it travels through inland waters from soils to the sea. Analysis of data from across the continuum of inland and marine aquatic systems reveals that the rate of organic carbon decay depends on water retention time.

Aqua Incognita: the unknown headwaters

Abstract: Running water comprises just over one millionth of the world’s water.The importance of those streams and rivers as a resource for humanwelfare and biodiversity, however, is far out of proportion to thatminuscule fraction. This explains why protecting running waters (theflow regimes, water quality and biota) is such a vital concern for society.Yet for all the focus and concern, how much do we actually know aboutthese running waters, and the lotic habitat they comprise?Consider what would happen if one asked any national environmentalauthority to assess the basic chemical and ecological status of runningwaters. At the river mouths, there would be enough information tomake a reasonable assessment of the status. But somewhere on theway upstream, available data would run dry, long before most streamchannels did (in non-arid regions).In Sweden, with an ambitious programme for monitoring and assess-ing surface waters, it came as a surprise several years ago to realizethat the length of all perennial streams on the country’s maps was notknown. When that was modelled in the form of a ‘virtual network’ froma50m