Global urban environmental change drives adaptation in white clover.

Urbanization transforms environments in ways that alter biological evolution. We examined whether urban environmental change drives parallel evolution by sampling 110,019 white clover plants from 6169 populations in 160 cities globally. Plants were assayed for a Mendelian antiherbivore defense that also affects tolerance to abiotic stressors. Urban-rural gradients were associated with the evolution of clines in defense in 47% of cities throughout the world. Variation in the strength of clines was explained by environmental changes in drought stress and vegetation cover that varied among cities. Sequencing 2074 genomes from 26 cities revealed that the evolution of urban-rural clines was best explained by adaptive evolution, but the degree of parallel adaptation varied among cities. Our results demonstrate that urbanization leads to adaptation at a global scale

Disaster aid? Mapping historical responses to volcanic eruptions from 1800–2000 in the English-speaking Eastern Caribbean: their role in creating vulnerabilities

This paper uses volcanic eruptions on Montserrat and St. Vincent to explore the role that British colonial rule in the past and near past (1800–2000) has played in response to and recovery from hazardous events, and in turn, the influence that the nature of the hazards has on these responses. We show that systemic vulnerabilities to natural hazards have been created by inadequate aid responses and longer-term chronic problems and demonstrate that hazard impacts are compounded by these vulnerabilities. Vulnerabilities could be reduced by analysing integrated hazard impacts to generate mitigative measures across hazards and identify actions that more closely match timescales of political decision-making. Integrating local knowledge and experience into risk analysis will identify the most effective use of aid resource, ahead of emergencies. Finally, coupling aid for long term development with emergency response would improve outcomes and adaptation to longer term vulnerabilities in immediate rebuilding and short-term recovery

Phosphorus-bearing molecules in the Galactic Center

Phosphorus (P) is one of the essential elements for life due to its central role in biochemical processes. Recent searches have shown that P-bearing molecules (in particular PN and PO) are present in star-forming regions, although their formation routes remain poorly understood. In this Letter, we report observations of PN and PO towards seven molecular clouds located in the Galactic Center, which are characterized by different types of chemistry. PN is detected in five out of seven sources, whose chemistry is thought to be shock-dominated. The two sources with PN non-detections correspond to clouds exposed to intense UV/X-rays/cosmic-ray radiation. PO is detected only towards the cloud G+0.693$-$0.03, with a PO/PN abundance ratio of $\sim$1.5. We conclude that P-bearing molecules likely form in shocked gas as a result of dust grain sputtering, while are destroyed by intense UV/X-ray/cosmic ray radiation.Comment: 5 pages, 3 figures, 2 tables, accepted for publication in MNRAS Letter

Cerca del Rio y Lejos del Agua: Water, Autonomy and Hope in the Ecuadorian Andes

Community water associations perform a pivotal role in the delivery of water services in the rural Ecuadorian Andes. The water that they deliver to houses and farmers is the fruit of a historical process of collective organisation that has united rural families and communities in a struggle to overcome socially constructed water scarcity. Through this ongoing struggle, water associations have developed varying degrees and forms of collective autonomy. Not only has this enabled them to distribute potable and irrigation water, but also create new social and political practices and relations. Drawing on the innovative work of Ana C. Dinerstein, this chapter traces the contours of this historical process, explaining how water associations have carved out space to take autonomous control of local water supplies and reconfigure relations with the state and nature