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Cooperation, inducible defense, cancer, and more

Here are some papers that look interesting this week.

Prairie Dogs Disperse When All Close Kin Have Disappeared "cooperation among kin is more important than competition among kin for young prairie dogs"

Variants at serotonin transporter and 2A receptor genes predict cooperative behavior differentially according to presence of punishment "Participants with a variant at the serotonin transporter gene contribute more, leading to group-level differences in cooperation, but this effect dissipates in the presence of punishment."

Plant mating system transitions drive the macroevolution of defense strategies
the repeated, unidirectional transition from ancestral self-incompatibility (obligate outcrossing) to self-compatibility (increased inbreeding) leads to the evolution of an inducible (vs. constitutive) strategy of plant resistance to herbivores."

Intratumor heterogeneity in human glioblastoma reflects cancer evolutionary dynamics "we reconstructed the phylogeny of the fragments for each patient, identifying copy number alterations in EGFR and CDKN2A/B/p14ARF as early events, and aberrations in PDGFRA and PTEN as later events during cancer progression"

Non-optimal codon usage is a mechanism to achieve circadian clock conditionality"
"natural selection against optimal codons to achieve adaptive responses to environmental changes"

Gene Transfer from Bacteria and Archaea Facilitated Evolution of an Extremophilic Eukaryote "> 5% of protein-coding genes of G. sulphuraria were probably acquired horizontally"

Recent land use change in the Western Corn Belt threatens grasslands and wetlands
"a recent doubling in commodity prices has created incentives for landowners to convert grassland to corn and soybean cropping... onto marginal lands characterized by high erosion risk and vulnerability to drought."

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