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Western Amazon rivers play a critical and underrecognized role in sustaining the Amazon Basin’s ecological integrity, according to analysis of the status of the hydrology and sediments, biodiversity, and longitudinal connectivity across the region.

Precipitation and watershed topography interact to control nitrate export in Puget Sound rivers, and both need to be considered in nutrient management, according to a time series model that combines water quality samples and environmental variables.

Here, the authors present genome-wide aDNA from 138 Early Bronze Age individuals from Lower Austria. Their findings point to a patrilocal society with non-strict female exogamic practices and long-distance genetic connections across Central Europe.

An analysis of 24,202 critical cases of COVID-19 identifies potentially druggable targets in inflammatory signalling (JAK1), monocyte–macrophage activation and endothelial permeability (PDE4A), immunometabolism (SLC2A5 and AK5), and host factors required for viral entry and replication (TMPRSS2 and RAB2A).

Wastewater-based surveillance tends to focus on specific pathogens. Here, the authors mapped the wastewater virome from 62 cities worldwide to identify over 2,500 viruses, revealing city-specific virome fingerprints and showing that wastewater metagenomics enables early detection of emerging viruses.

The potential for enhanced sediment delivery to the Ganges-Brahmaputra delta exists, but it alone is insufficient to sustain the system. The delta may be resilient to climate change, but only in the absence of dam construction and water diversions.

This Perspective proposes the Population Neuroscience-Dementia Syndemics Framework and model to develop knowledge of how multiple factors may interact to perpetuate inequities in dementia, especially for women in low- and middle-income countries.

Hiʻiaka is the largest moon of the distant dwarf planet Haumea. Here, the authors report the first multi-chord stellar occultations of Hiʻiaka, revealing its size, shape, and density, suggesting an origin from Haumea’s icy mantle.

The amount of coarse gravel transported out of the Himalayan mountains by rivers is insensitive to catchment size, because the majority of gravel sourced more than 100 kilometres upstream of the mountain front is abraded into sand before it reaches the Ganga Plain.

Diversification of Neotropical birds is not directly linked to the Andean uplift, the major landscape change of the Neogene period; instead, most diversification is post-Neogene and species diversity is dependent on how long lineages have persisted in the landscape and how easily they disperse.

A major earthquake 2500 years ago caused one of the largest rivers on Earth to abruptly change its course. A recurrent event would pose the risk of such cascading hazards to the densely populated floodplains of present-day Bangladesh.

Whole-genome sequencing, transcriptome-wide association and fine-mapping analyses in over 7,000 individuals with critical COVID-19 are used to identify 16 independent variants that are associated with severe illness in COVID-19.

High-resolution geospatial mapping found that the annual incidence of cholera shifted from western to central and eastern Africa between 2011 and 2020, with the latter regions more likely to report cholera in 2022–2023, reflecting instability in cholera burden patterns that can impact progress in disease control.

An environmental bacterium, Burkholderia pseudomallei causes melioidosis, a fatal infection. A study from NE Thailand identifies that dominant lineages carry specific gene sets enhancing environmental persistence.

Pattern recognition receptors (PRR) critically modulate innate immunity. Here the authors show in cancer cells that interferon responses and anti-tumor immunity activated by dsRNA-induced PRR signaling is enhanced by palbociclib-induced ER stress, with epigenetic changes and altered antigen presentation potentially contributing to this effect.

Data on geographically restricted SARS-CoV-2 variants is lacking in some regions. In this nationwide effort including 18 public health labs, the authors used genomic epidemiology and travel data to understand the origin and spread of 2 variants of interest that predominated during the second wave of the pandemic in Nigeria.

A genome-wide association study of critically ill patients with COVID-19 identifies genetic signals that relate to important host antiviral defence mechanisms and mediators of inflammatory organ damage that may be targeted by repurposing drug treatments.

Lakes, reservoirs, and other ponded waters are common in large river basins yet their influence on nitrogen budgets is often indistinct. Here, the authors show how a ponded waters’ relative size, shape, and degree of connectivity to the river network control nitrogen removal.

4,000-year-old phytoliths (plant microfossils) from the Monte Castelo shell mound (southwestern Amazonia) provide evidence for an independent rice domestication event in the Americas.

Geospatial estimates of the prevalence of anemia in women of reproductive age across 82 low-income and middle-income countries reveals considerable heterogeneity and inequality at national and subnational levels, with few countries on track to meet the WHO Global Nutrition Targets by 2030.

We reconstruct the spatial distribution and timing of wetland loss through conversion to seven human land uses between 1700 and 2020, elucidating the magnitude and land-use drivers of global wetland losses to improve assessments of wetland loss impacts.

Whole-genome sequencing analysis of individuals with primary immunodeficiency identifies new candidate disease-associated genes and shows how the interplay between genetic variants can explain the variable penetrance and complexity of the disease.

The role ice sheets play in the silica cycle over glacial−interglacial timescales remains unclear. Here, based on the measurement of silica isotopes in Greenland meltwater and a nearby marine sediment core, the authors suggest expanding ice sheets considerably increased isotopically light silica in the oceans.

Coastal systems are hotspots of ecological, geochemical and economic activity, yet their dynamics are not accurately represented in global models. In this Review, Ward and colleagues assess the current state of coastal science and recommend approaches for including the coastal interface in predictive models.

This Perspective presents a wetting regime framework that is classified by dominant hydrologic mechanisms and highlights the resulting responses of stream biogeochemistry and community ecology.

Global aquatic foods are a key source of nutrition, but how their production is influenced by anthropogenic environmental changes is not well known. The vulnerability of global blue food systems to main environmental stressors and the related spatial impacts across blue food nations are now quantified.

Ancient DNA reveals how the explosive expansion of Yamnaya steppe pastoralists began with a small community north of the Black Sea speaking ancestral Indo-European, and detects genetic links with Anatolian speakers, stemming from a common Indo-Anatolian homeland in the North Caucasus–lower Volga region.

Subglacially produced methane of microbial origin is flushed to the ice margin of the Greenland ice sheet by meltwater, contributing to a previously unaccounted for methane flux to the atmosphere.

Changes in agricultural practices have led to the expansion of tree plantations across the tropics, but this expansion is poorly characterized. Nearly 7 million unique patches of observed tree cover gain are classified through satellite imagery to report on tropical tree plantation expansion between 2000 and 2012.

Gelabert et al. examine genomic and archaeological data from Europe’s earliest farming communities in Central Europe (5500–5000 bce). They find differentiated genetic networks but no evidence of unequal access to resources linked to sex or kin.

The winter of 2013–14 witnessed severe flooding across much of the UK putting pressure on policy makers to improve future planning for periods of torrential rainfall. This Perspective puts the flooding in the context of historical records, critically examines a range of potential causes, and sets out research directions needed to achieve a definitive assessment on the possible human contribution to the flooding.

The International Union for Conservation of Nature’s Global Ecosystem Typology has been developed to provide a systematic framework for data on all of Earth’s ecosystems in a unified theoretical context to support biodiversity conservation and ecosystem services.