Mark Lever
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Articles by Mark Lever
High sea ice algal primary production near marine-terminating glaciers linked to turbulence-driven nutrient fluxes across the ice–ocean interface
Abstract Sea ice primary production is a key component supplying carbon to higher trophic levels when few other resources are available. In bottom-ice habitats, this production is limited by light availability and nutrient supply from underlying seawater. Reports of low sea ice primary production from Greenland have reinforced the view that landfast ice is regionally unimportant.
How humans altered Coastal Bend ecosystems
The Port of Corpus Christi is the third-largest port in the US by tonnage and was ma d e possible through the construction of the Aransas Pass ship channel. The initial construction of this ship channel (1907-1919), the Intra-Coastal Waterway ( 1941), along with subsequent channel deepening and terminal construction have altered sediment and water exchanges between Corpus Christi Bay […] Subscribe Purchase Single Issue The full version of this story will be available to all readers after 2 weeks.
Might seaweed be the next Texas farm crop?
Since the Industrial Revolution, human societies have increasingly depended on the consumption of non-renewable resources, such as fossil fuels. While fossil fuel combustion enabled the most rapid economic growth and technological advances in the history of humankind, its environmental side effects are increasingly becoming a threat.
Capturing spatiotemporal variation in salt marsh belowground biomass, a key resilience metric, through geoinformatics
Abstract The Belowground Ecosystem Resiliency Model (BERM) is a geoinformatics tool that was developed to predict belowground biomass (BGB) of Spartina alterniflora in salt marshes based on remote sensing of aboveground characteristics and other readily available hydrologic, climatic, and physical data. We sought to characterize variation in S.
The effect of a short oxygen exposure period on algal biomass degradation and methane formation in eutrophic and oligotrophic lake sediments
Abstract Eutrophication is suggested to enhance lacustrine methane emissions, due to enhanced sedimentary decomposition rates of algal biomass, and more frequent occurrence of water column anoxia. We investigated methane emissions from sediments originating from both a eutrophic and oligotrophic lake, and tested the effect of additional algal C inputs.
Intact polar lipidome and membrane adaptations of microbial communities inhabiting serpentinite-hosted fluids
1. Introduction Efforts to detect life on other planetary bodies can be informed by investigating the distribution, diversity, and adaptations of extant life in planetary analog environments on Earth. Of particular interest are serpentinizing settings because the reducing conditions that arise during the hydration of ultramafic rock can yield abundant energy for microbial metabolism through the generation of hydrogen and organic compounds (Schulte et al., 2006; Russell et al., 2010).
Integration of untargeted metabolomics and microbial community analyses to characterize distinct deep-sea methane seeps
1 Introduction Methane seeps are areas where methane leaks from vast subseafloor reservoirs, fueling dense communities of organisms. Methane seep communities, including endemic microorganisms and animals, either harness the chemical energy being released from the seafloor directly or through symbiosis, or make use of the habitat (both physical and chemical) created by seep biological processes.
Thermophilic methane oxidation is widespread in Aotearoa-New Zealand geothermal fields
1. Introduction The greenhouse gas methane (CH4) is responsible for a large proportion of global climate change, being 28 times more effective than carbon dioxide (CO2) at absorbing infra-red radiation (Forster et al., 2021). The global methane budget is ~730 Tg yr−1 from both natural and anthropogenic sources; with ~5% of this methane consumed by methanotrophic bacteria before it reaches the atmosphere (Canadell et al., 2021).
Frontiers | Metapangenomic investigation provides insight into niche differentiation of methanogenic populations from the subsurface serpentinizing environment, Samail Ophiolite, Oman
Introduction Earth’s deep subsurface biosphere requires substrates created from water-rock interactions to support a continued source of chemical energy for microbial metabolisms. Serpentinization—the hydration and oxidation of ultramafic, olivine-rich rock connected to the reduction of water—produces the secondary minerals serpentine, iron oxides, as well as hydroxides, and molecular hydrogen (H2; Sleep et al., 2004; Schulte et al., 2006; McCollom and Seewald, 2013).
Expanding the taxonomic and environmental extent of an underexplored carbon metabolism-oxalotrophy
1. Introduction Plant production of oxalate biominerals appears to be widespread and oxalate minerals are stable over geologic time, yet oxalates are uncommon in the geologic record (Hofmann and Bernasconi, 1998; Stephens, 2012). Moreover, soil oxalate concentrations reported in the literature are often below detection limits, or on the order of a few micromolar—far less than would be expected given the apparent extent of production (Jones, 1998; Strobel, 2001).
Embracing volunteering is not a risk for the NHS
Corona Virus breaking news and critical stories remain free for registered users Certain articles and Insight pieces remain paying-subscriber only content As a registered user you will get access to: Daily News: an essential email round-up of all the latest news, comment and best practice Breaking news headlines delivered directly to your inbox Limited access to hsj.co.uk Already registered to HSJ? Sign in now
NHS leaders don't understand the value of volunteers
Corona Virus breaking news and critical stories remain free for registered users Certain articles and Insight pieces remain paying-subscriber only content As a registered user you will get access to: Daily News: an essential email round-up of all the latest news, comment and best practice Breaking news headlines delivered directly to your inbox Limited access to hsj.co.uk Already registered to HSJ? Sign in now
Covid-19 has decimated volunteer services in the NHS
Corona Virus breaking news and critical stories remain free for registered users Certain articles and Insight pieces remain paying-subscriber only content As a registered user you will get access to: Daily News: an essential email round-up of all the latest news, comment and best practice Breaking news headlines delivered directly to your inbox Limited access to hsj.co.uk Already registered to HSJ? Sign in now
Autism: where we are in 2019
Mark Lever looks at what it’s like to be autistic and examines the state of public understanding of autism Most people have heard of autism now. But most don’t understand what it can actually be like to be autistic and the various joys and challenges autistic people will experience throughout their lives. Unhelpful stereotypes are still far too commonplace. When things go wrong for autistic people and their families, the root cause is often a lack of understanding.
Preservation of microbial DNA in marine sediments: insights from extracellular DNA pools
The full text of this article hosted at iucr.org is unavailable due to technical difficulties.
The National Autistic Society's Autism Hour is coming...
This October, as featured in The Sunday Times last week, we're embarking on our most ambitious project yet... The National Autistic Society's Autism Hour. Shops and businesses up and down the country will be taking part to help make the world a more autism-friendly place. For autistic people, the world can seem full of too much information - and too little understanding. That's why 64% of autistic people and their families avoid even going out to the shops.
Sesame Street introduces new character who has autism
The newest Sesame Street character, Julia, is a little girl who also has autism. The Sesame Workshop says she is being introduced as part of a campaign to take the stigma away from the disorder. They also hope Julia will help those who are dealing with autism. The workshop says she'll be portrayed as a girl who "does things a little differently" when playing with her Muppet friends, including Elmo and Abby.
OPINION: Newspapers cure in ‘post-truth’ world
Mark Lever is President and CEO of The Chronicle Herald. The following is the text of a presentation prepared for delivery Thursday to the House of Commons Standing Committee on Canadian Heritage, which is examining the state of Canada’s news media: It’s a privilege to join you today. I’m pleased to be here on behalf of The Chronicle Herald and to bring the perspective of challenges facing daily newspapers like ours across the country.
MARK LEVER: A letter to our readers
Over the past several weeks, we have been actively and consistently at the negotiating table, working to find an agreeable solution with members of our newsroom union. I had hoped that following those discussions this update would be one of good news. I’m disheartened to say it’s not. After weeks of informal discussions, we went to the table last Friday, November 4th expecting to get a deal. We were astonished with the lack of preparedness and understanding of the issues from the union committee.
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