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Volume 626 Issue 7997, 1 February 2024

Significant otters

The cover shows a sea otter (Enhydra lutris) off the coast of California. This species is a top predator but was hunted to near extinction. In this week’s issue, Brent Hughes and colleagues reveal that the recovery of the sea otter population in a California salt marsh has slowed salt marsh decline in the area. It has long been suspected that the recovery of top predators would have a cascading effect on the vegetated ecosystem, but the issue remains controversial. The researchers monitored Elkhorn Slough estuary over several decades and found that erosion of the salt marsh edges slowed in line with the rising otter population because the otters preyed on the burrowing crabs that damage the marsh. These results suggest that restoring top predators could have positive effects on vulnerable coastal ecosystems.

Cover image: Sebastian Kennerknecht/Minden Pictures

This Week

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    • Conservation is bringing back certain predators that are high in the food chain, but how this affects an ecosystem overall is debated. Rigorous fieldwork provides strong evidence that sea otters help to mitigate coastal erosion.

      • Johan S. Eklöf
      News & Views
    • Small groups of mobile neutral atoms have been manipulated with extraordinary control to form ‘logical’ quantum bits. These qubits can perform quantum computations more reliably than can individual atoms.

      • Barbara M. Terhal
      News & Views
    • A technique for embedding fibres with semiconductor devices produces defect-free strands that are hundreds of metres long. Garments woven with these threads offer a tantalizing glimpse of the wearable electronics of the future.

      • Xiaoting Jia
      • Alex Parrott
      News & Views
    • A rare example of the reversal of a bacterial predator–prey relationship suggests that such species interactions are more complex than was realized.

      • Andrew Mitchinson
      News & Views
    • LINE-1 DNA elements self-duplicate, inserting the copy into new regions of the genome — a key process in chromosome evolution. Structures of the machinery that performs this process in humans are now reported.

      • Gael Cristofari
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    • The risk of catching COVID-19 as calculated by a smartphone app scales with the probability of subsequently testing positive for the coronavirus SARS-CoV-2, showing that digital contact tracing is a useful tool for fighting future pandemics.

      • Justus Benzler
      News & Views
  • Perspective

    • Four future greenhouse gas emission scenarios for the global plastics system are investigated, with the lead scenario achieving net-zero emissions, and a series of  technical, legal and economic interventions recommended.

      • Fernando Vidal
      • Eva R. van der Marel
      • Charlotte K. Williams
      Perspective
  • Articles

    • A programmable quantum processor based on encoded logical qubits operating with up to 280 physical qubits is described, in which improvement of algorithmic performance using a variety of error-correction codes is enabled.

      • Dolev Bluvstein
      • Simon J. Evered
      • Mikhail D. Lukin
      Article Open Access
    • The Berry phase is resolved in light-driven crystals, via attosecond interferometry, in which the electronic wavefunction accumulates a geometric phase as it interacts with the laser field, mapping its coherence into the emission of high-order harmonics.

      • Ayelet J. Uzan-Narovlansky
      • Lior Faeyrman
      • Nirit Dudovich
      Article Open Access
    • A mechanical design is developed for the fabrication of ultralong, fracture-free and perturbation-free semiconductor fibres to address the increasing demand for flexible and wearable optoelectronics.

      • Zhixun Wang
      • Zhe Wang
      • Lei Wei
      Article Open Access
    • We report atomic observations of six incoherent twin boundary configurations and structural transitions in diamond at room temperature, showing a dislocation-mediated mechanism different from metallic systems and shedding new light on grain boundary behaviour.

      • Ke Tong
      • Xiang Zhang
      • Yongjun Tian
      Article
    • We introduce a method for the direct 1,3-difunctionalization of alkenes, based on a concept termed ‘charge relocation’, which enables stereodivergent access to 1,3-difunctionalized products of either syn- or anti-configuration from unactivated alkenes.

      • Bogdan R. Brutiu
      • Giulia Iannelli
      • Nuno Maulide
      Article Open Access
    • We investigate the mechanism underlying the sulfur reduction reaction that plays a central role in high-capacity lithium sulfur batteries, highlighting the electrocatalytic approach as a promising strategy for tackling the fundamental challenges associated with these batteries.

      • Rongli Liu
      • Ziyang Wei
      • Xiangfeng Duan
      Article
    • A study reports a combination of processing, optimization and low-damage deposition methods for the production of silicon heterojunction solar cells exhibiting flexibility and high performance.

      • Yang Li
      • Xiaoning Ru
      • Zongping Shao
      Article
    • Sea otters recolonizing an estuary in California indirectly reduce erosion by reducing burrowing crab abundance, suggesting that restoring predators could be a key mechanism to improve the stability of coastal wetlands and other ecosystems.

      • Brent B. Hughes
      • Kathryn M. Beheshti
      • Brian R. Silliman
      Article
    • Analysis of naturally hybridizing swordtail fish species reveals a mitonuclear genetic incompatibility among three genes that encode components of mitochondrial respiratory complex I, providing insights into the emergence of hybrid incompatibilities and reproductive barriers.

      • Benjamin M. Moran
      • Cheyenne Y. Payne
      • Molly Schumer
      Article Open Access
    • Latrophilin-3 organizes synapses through a convergent dual-pathway mechanism in which Gαs signalling is activated and phase-separated postsynaptic protein scaffolds are recruited.

      • Shuai Wang
      • Chelsea DeLeon
      • Thomas C. Südhof
      Article Open Access
    • Digital measurements of proximity and duration of exposure by the NHS COVID-19 app show a strong relation to actual infections among 7 million contacts notified in England and Wales, with longer durations translating to increased risk of transmission.

      • Luca Ferretti
      • Chris Wymant
      • Christophe Fraser
      Article Open Access
    • Low-affinity transcription factor binding sites are prevalent across the genome, and single nucleotide changes that increase binding affinity even slightly can cause gain-of-function gene expression and phenotypes (such as polydactyly).

      • Fabian Lim
      • Joe J. Solvason
      • Emma K. Farley
      Article Open Access
    • Autoreactive T cells that target myelin antigens in the peripheral nerves are present in patients with the demyelinating form of Guillain–Barré syndrome, and these T cells are likely to contribute to disease pathophysiology.

      • L. Súkeníková
      • A. Mallone
      • D. Latorre
      Article Open Access
    • High-speed molecular tracking is integrated with three-dimensional electron microscopy to map the diffusion distribution and ultrastructure of endoplasmic reticulum-mitochondria contact sites, revealing the ability of high-speed single-molecule imaging to map contact site interface structures and corresponding diffusion landscapes.

      • Christopher J. Obara
      • Jonathon Nixon-Abell
      • Jennifer Lippincott-Schwartz
      Article Open Access
    • Human LINE-1 ORF2p relies on upstream single-stranded target DNA to position the adjacent duplex in the endonuclease active site for nicking of the longer DNA strand, with a single nick generating a staggered DNA break.

      • Akanksha Thawani
      • Alfredo Jose Florez Ariza
      • Kathleen Collins
      Article Open Access
    • X-ray crystallography, cryo-electron microscopy, structural modelling, biochemistry, cell biology, and evolutionary analysis enable characterization of ORF2p, the reverse transcriptase of the ancient ‘parasitic’ LINE-1 retrotransposon that has written around one-third of the human genome.

      • Eric T. Baldwin
      • Trevor van Eeuwen
      • Martin S. Taylor
      Article Open Access
    • Deep learning models were used to design synthetic cell-type-specific enhancers that work in fruit fly brains and human cell lines, an approach that also provides insights into these gene regulatory elements.

      • Ibrahim I. Taskiran
      • Katina I. Spanier
      • Stein Aerts
      Article Open Access
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