Serene Lee/Sopa Images/Lightrocket via Getty Images
The emergence of AI chatbots introduces a significant turning point, suggesting that online content is increasingly unreliable in terms of human creation. How do people reflect on this transformation? Some are urgently striving to preserve “pure” data from the pre-AI period, while others advocate for documenting AI’s own contributions, enabling future historians to analyze the evolution of chatbots.
Rajiv Pant, an entrepreneur and former chief technology officer, notes in the New York Times and Wall Street Journal that he views AI as a potential risk to information integrity, particularly concerning news articles that constitute historical records. “Since the launch of ChatGPT, we’ve been grappling with this issue of ‘digital archaeology’, which is becoming increasingly pressing,” Pant remarks. “Currently, there’s no dependable way to differentiate between human-created content and that generated by large AI systems. This is a concern that extends beyond academia; it affects journalism, legal clarity, and scientific discovery.”
For John Graham-Cumming of cybersecurity company CloudFlare, data generated post-ChatGPT is akin to low-background steel, prized for its application in sensitive scientific and medical devices, devoid of residual radioactive contamination from the Atomic Age that disrupts measurements.
Graham-Cumming has established a website, Lowbackgroundsteel.ai, which has already demonstrated that Wikipedia reflects the impacts of AI contributions, aiming to archive data sources lacking AI contamination, such as the complete Wikipedia archive from August 2022.
“There were times we handled everything manually, but eventually, this process became significantly augmented by chat systems,” he explains. “You can view this as a type of pollution, or positively, as a way for humanity to advance with assistance.”
Mark Graham, who operates the Wayback Machine on the Internet Archive—an initiative that has been documenting the public Internet since 1996—expresses skepticism regarding the effectiveness of new data archiving initiatives, especially since the Internet Archive captures up to 160 terabytes of new information daily.
Graham aspires to develop a repository of AI outputs for researchers and historians in the future. He plans to pose 1,000 local questions each day and record the chatbot’s responses, even leveraging AI for this extensive task. This method helps document the evolving outputs of AI for future human inquiry.
“You ask a specific question, receive an answer, and the next day, you can re-ask the same question to receive a potentially different response,” Graham comments.
Graham-Cumming emphasizes he is not against AI; instead, he believes preserving human-generated content can actually enhance AI models. This is crucial since subpar AI outputs may harm the training of new models, leading to “model collapse.” Preventing this occurrence is a worthy endeavor, he asserts.
“At some point, one of these AIs is bound to contemplate concepts that humans haven’t considered. It will prove a mathematical theorem or innovate something entirely new.”
Strategies to uphold the current involve oversized versions of parachute-like ocean anchors
Ed Darnen (2.0 by CC)
As part of an ambitious initiative to avert severe climate change, large parachutes could be deployed into Atlantic waters using transport tankers, drones, and fishing vessels.
The Atlantic Meridional Overturning Circulation (AMOC) moves warm water from the tropics northward and helps stabilize temperatures in Northern Europe.
Nevertheless, the swift melting of Arctic ice and rising sea temperatures have hampered these currents, prompting some scientists to warn that they could falter entirely within this century. Such an event would disrupt marine ecosystems and exacerbate the cooling of the European climate.
Experts emphasize the urgent need to cut greenhouse gas emissions to mitigate the risk of AMOC collapse and other catastrophic climate “tipping points.” However, some are exploring alternative, more fundamental methods to preserve the current.
Stuart Haszeldine from the University of Edinburgh, along with David Sevier, introduced a concept from the British water treatment firm Strengite during a recent meeting in Cambridge, UK. They propose utilizing just 35 ocean tugs, each capable of pulling underwater parachutes roughly half the size of a soccer pitch, which could effectively move enough water to maintain the current. “A modest amount of energy and equipment can yield a significant impact,” Haszeldine remarks.
These parachutes, designed similarly to existing ocean anchors, stabilize containers in rough weather while also aiding in water movement across the sea surface. Each parachute features a central hole 12 meters wide to allow marine creatures to escape.
The operation would run 365 days a year in a rotating schedule, using drones, transport tankers, tugs, or wind kits. “It’s a small but consistent intervention,” notes Haszeldine.
Sevier refers to this proposal as “any Mary,” indicating a solution to stave off the severe consequences of AMOC collapse. “This is about buying time,” he asserts, emphasizing the need for the world to reduce emissions sufficiently to stabilize global temperatures at safe levels.
However, leading AMOC researchers express skepticism about the idea. Rene van Westen from the University of Utrecht, Netherlands, highlights that the density differences between cold, salty water and warm, fresh water play a crucial role in the descent and upwelling movements that sustain AMOC.
“If this idea is to work,” Van Westen argues, “you can only use surface wind to influence the top layer of water.
Stephen Rahmstoef from the Potsdam Institute for Climate Impact Research concurs. “The challenge lies not in moving surface water horizontally but in sinking it to depths of 2,000 to 3,000 meters and returning it south as a cold, deep current,” he states.
Meric Srokosz of the UK National Oceanography Centre believes the proposal is “unlikely to succeed,” given the variable weather conditions that complicate equipment deployment in the oceans.
Haszeldine welcomes feedback from fellow scientists regarding the proposal and hopes it will inspire ocean and climate modelers to assess the ecological and environmental ramifications of the plan. “I believe this warrants further investigation,” he asserts.
More generally, Haszeldine argues for increased research focused on climate intervention strategies to sustain ocean circulation: “I don’t see anyone else working on ocean currents.”
the is a small junction in a Norfolk village where a red telephone booth stands on a battlefield at the heart of the struggle between an 89-year-old man and a multi-billion-pound multinational corporation. And in the red phone box, evacuating from the wind, there is Derek Harris. Last month he learned that BT (formerly British News) was threatening to close the phone box in the village of Charrington, where he had lived for 50 years when he saw it on the Parish Council agenda. “I thought, ‘I thought I should do something about this,'” Harris said.
He describes it as a “David and Goliath” campaign. It is, and – as revealed in February, this sun-lit but chewing, no longer. We talk about mortality and compromise, heritage and value. I leave with a new sense of how I can feel my true love for inanimate objects and why it is important to have a mission.
But first, some field mice. Charlington is in a picturesque part of the East Anglia countryside. “We are surrounded by open, rolling, wonderful fields – cultivated, beautiful,” says Harris. [of phone lines]. On the other side of the church just above the road is a telegraph pole, inside which three mice nest. ” His eyes glow. The rodents nibbled through the wires, destroying the villagers’ telephone lines and the internet. He says he knows about the mouse because the engineers at OpenReach, a BT-owned company that cares for the network, told him.
Harris is turning his eyes to OpenReach as he has a green junction box connected to a new fibrous cable just a few meters from the phone box. Harris will not take much time to connect the payphone to fiber formation, and like the entire phone network, he will need to upgrade his phone booth to a digital line before the analog network is turned off in 2027. “There’s no reason why you shouldn’t connect. Anyway, engineers say they come most weeks.”So maintenance.” [of the phone box] There is no problem. It’s cost-effective.”
The UK has 14,000 working phone booths, down from 20,000 three years ago. At its peak in the 1990s there were 100,000. Of these, approximately 3,000 have iconic red designs. It’s probably strange that phone boxes are surviving at all when around 95% of households have mobile phones.
It is owned and operated by BT and costs millions of pounds each year, so it is requested by regulator Ofcom under the mandate of quaintly named Telephony Universal Services. In the year until May 2020, emergency services were made from telephone booths and 25,000 and 20,000 calls were made to Childline and Samaritans, respectively.
“We have a legal responsibility to ensure that phone booths exist to meet the reasonable needs of UK citizens,” says Katie Hanson, senior consumer policy manager at Ofcom, who was part of a review of the new guidance that was published in 2022. The approach we took is that the boxes we think are essential are protected from removal.”
If the last time in the area (more than 400 meters from another phone box), you cannot remove the phone box if one or more of the following conditions apply: If you’re in an area that doesn’t have coverage for all four mobile network providers, or if you’ve made at least 52 calls in the past year, or if you have a large number of places how hobes hobes hobes in how in hocidens how in hocidents, or if you have high social needs, for example, if you have many calls to helplines such as childline or domestic abuse charities. If the phone booth is the last on the site and none of the other terms apply, and BT wants to remove it, you must start a consultation process with the local government.
Crisis Charities Childline and Samaritans receive thousands of calls from phone booths.
Photo: Sally Anscombe/Getty Images
It is one of the 10 North Norfolk District Council area that was assigned to remove less than 10 calls from Sharrington’s public telephone box last year. The village in the reserve features a 13th century church and Jacobian Manor House. Harris believes that the phone booth is a “symbolic heritage property” and that local MP Steph Aquaron wrote in historic England to list it. “K6 models work rarely,” says Harris. Topped with a golden Tudor crown, the K6 (for kiosk number 6) was designed by Ir Gilbert Scott in 1935 to mark George V’s silver jubilee.
Harris has lived in Charlington for half a century. It was just that he and his late wife raised two children. The phone booth was there longer. Both Harris and K6 share their birth year in 1935. This partially explains his affinity. He spent his childhood in Surrey, near Croydon Airport, enjoying the sight of a plane flying overhead.
“It’s very interesting for a little boy,” he says. “It wasn’t a very good place when the war began, as the airport was the target.” The family took shelter to the south coast, but it wasn’t that safe. German fighter bombers attack the area with a “chip and run” attack. When Harris was about eight years old, he survived such an attack while playing with his brother. “We saw a friend injured. Some were killed.” A few years later, as a young man, Harris joined the Army and was injured. “The outdoor surgeon saved my life,” he says, but he was warned that he would need multiple operations in the coming years and not expect long lifespans (he reminds me a few times in “90th year”).
“I faced death in 2016. It’s still here.”… Harris Councillor Andrew Brown (left).
Photo: Joshu Abright/Guardian
Sharrington’s phone booth also fights previous threats to its life. “They tried to remove it in 2016, but we resisted it well,” says Harris. “I have faced death before and passed through it. I faced death in 2016. It’s still here. Something tells me that it’s meant to stay.” Campaigns to keep it, including Harris and local councillor Andrew Brown, were given an extra month to sue their lawsuit.
“It could be a lifeline and a conservation asset,” Brown says. The area is rural and isolated, with some villagers virtually no mobile signals. North Norfolk has the highest proportion of seniors in the UK and Wales, with adults probably not having a mobile phone. And it has one of the highest percentages of the second home in the country. In an emergency, try knocking on the empty villa door without a mobile signal or work payphone.
He made their point in 2016, Harris said: It wasn’t just a museum piece, people used it. “However, he admits, “probably more of them than they are now.”
Many of the village elders who relied on phone boxes for not having a cell phone have been dead since then, but some older people still use it, Harris claims. If the box survives, one of the handfuls of calls that I logged in in 2025 will be created by me. I lift the receiver and the crackling of dial tones and deep ham go back to the teenage phone and the quick garbled call you had to make before the money runs out. This phone box doesn’t take coins and doesn’t charge me. That’s confusing. You will see that there are some phone booths that don’t allow you to take coins or cards and make free calls to your UK landlines and mobile phones.
It rings the only number you remember without looking at your contact list. He won’t pick it up. Because in this era, who answers unknown landline numbers? So I’m whatsapp to say he rings out of the phone box and says it’s me! We are both temporarily excited about novelty and nostalgia.
Harris admits that mobile phones are everywhere, but he points out that in this part of the country, the signals are rough. “We live next to the quiet Graven Valley, perhaps the most beautiful part of Norfolk, where pure chokestream runs. It’s what attracts ramblers, walkers, lots, and everyone works.” Think if there’s an emergency and your mobile network is down. He says it can happen more and more frequently as you experience extreme weather. “If someone said, ‘If you kept up to that job,’ wouldn’t that be awful? “
It is used in emergencies. “What you need to keep in mind is that some phones made were essential and probably saved someone’s life. It wasn’t that long ago, but there was a snowstorm.” The mobile network is down, and the phone someone made from the phone box was “the only way the rescue came to save this driver, whose car was completely covered in snow. It fell from the top of the hedge in his car and he was trapped.” And not too far is the main road known locally as the Charlington Straight, a rare, straight road that Norfolk’s most reckless drivers tend to speed up. Last year, Harris said: It’s a hot spot for accidents. “
He makes his point for just and practical reasons that he needs to keep a phone box, but this is not the whole story, and when we are talking, we find ourselves out of the cold at a nearby cafe.
“The closer you get to the end, the more you want to see things live. I don’t want to see it die ‘… Derek Harris. Photo: Joshu Abright/Guardian
“Would you like to see the work K6 that BT holds?” asks Harris. He is a good speaker. He distrusts human rights lawyers and misses the day when people respect the police. But he is not all traditionalists. He worked for much of his career in energy savings. I think he likes purpose and order – he dresses perfectly in pressed jeans and shirts, as well as a traditional, untouched overcoat – that may be why he is not keen on the way red phone boxes are being reused in other villages. When BT adopted the kiosk scheme, the phone booth became the home of the library, or defibrillators. Why can’t Sharrington enjoy a new life as such?
“It wasn’t designed for that,” Harris says. “It was designed for communication. Why should it be changed to something else? It’s a telephone kiosk. It’s not a library of sorts or anything.”
Turn it into something else, and it becomes a quirky relic of British history. Another dial tone is dead. As a functional phone booth, “It’s going to be alive, right? So I feel empathy – I feel empathy for what is alive.”
For Harris, that’s personal. Continuity has comfort, which means saving what is worth saving and making the world a better place, or at least not diminishing it. It includes the iconic red telephone box, which works in the village where he lived for a long time. “It’s fighting for something precious, take good care of it,” he says, the more he gets it. The closer you get to the end, the more you want to see things live. I don’t want to see it die. That’s how you put it. That’s what I’m fighting for. “
The federal government announced this week that grizzly bears will be reintroduced to Washington state’s North Cascade Mountains. The decision follows many years of intense and divisive debate.
But due to the complex process of capturing bears from British Columbia and northwestern Montana, transporting them by truck and helicopter, it will take many years before bears can venture into the remote and rugged terrain. It may also be costly.
“There’s a lot of work to do before we can schedule it,” said Jason Ransom, a wildlife biologist with North Cascades National Park. “Getting the planning right is critical to the success of a project like this.”
This reintroduction will restore a keystone species to the North Cascades, one of the most protected landscapes in the United States. Grizzlies once roamed throughout the region, but were extensively hunted for their fur. The National Park Service reports that there has not been a confirmed bear sighting since 1996.
Both agencies plan to release between three and seven bears each year with the goal of reaching a population of 200 bears within 60 to 100 years.
Ransom mentioned that grizzly bears play a vital role in turning soil, spreading seeds, and adapting to various habitats for reproduction. Their versatility makes them resilient to environmental changes, including those caused by climate change.
But opponents express concerns about the safety risks grizzly bears may pose to humans, as well as the potential conflicts with farmers and ranchers in the surrounding areas. The reintroduction project is addressing these concerns by selecting a release site in high-quality habitat far from populated areas.
The federal government has designated the project’s grizzly bears as a “nonessential experimental population” under the Endangered Species Act, providing legal flexibility to manage potential conflicts and protect both humans and bears.
The process of capturing and releasing bears involves using culvert traps, anesthesia, veterinary examinations, and radio collars for tracking purposes. The gradual reintroduction process aims to allow humans and bears to adapt to each other in an environment that has been bear-free for decades.
Starting with 25 bears allows the population to grow slowly, giving both humans and bears a chance to coexist in the area that has been without bears for a long time.
In my family, we have developed a habit of ordering affordable DVDs whenever we discover a show or movie that we know we want to watch again (which is a trick in itself!).
Towards the end of 2020, when I relocated to a new apartment in another area of Seattle, I ended up disposing of a trash bag full of VHS tapes. While it was inevitable due to spatial constraints, I had a strong feeling that I might regret it. A sudden shift in the TV landscape where channels started charging viewers for access to old content (from Jaws to Airplanes to classic dramas) literally overnight caught us off guard. We hadn’t anticipated such a rapid change. mountain aspect
‘In the end, it will become a future landfill site.‘
I enjoy the concept of having a DVD collection and perusing its shelves like a rental store.
However, I can’t shake off the realization that most of the valuable possessions we accumulate will eventually end up in future landfills, left for future generations to grapple with. I am also keenly aware that at some point, I will either have to take on the responsibility of disposing of and redistributing my various interests, or pass the task on to a close relative. In that sense, the thought of owning even a modest DVD collection extensive enough to cover all bases fills me with dread. I think of my grandparents and the boxes they amassed over their lifetimes, destined for disposal in the dump, their parents’ attic, or the charity shop. TypeON negative
‘There’s a significant disparity in quality…‘
I may be considered a Luddite, but I’m not particularly captivated by this trend of streaming.
I recently watched a movie on Disney+. Newer movies often exhibit overly dark visuals (a complaint echoed by several acquaintances). Older films are frequently displayed in incorrect proportions or feature subpar soundtracks. My son has recently subscribed to Prime Video mainly for the TV shows but has yet to explore the movie offerings. For some reason, I harbor doubts about being able to find the movie I wish to watch.
Fortunately, we still have a local HMV store. Nothing beats the experience of strolling there, browsing around for an hour or so, and selecting a Blu-ray. The disparity in quality between watching movies via streaming and physical media is quite pronounced. “After Hours”, “Eraserhead”, “Boogie Nights”, “Naked”, “The Conversation”, “The Passengers”… While casual movie enthusiasts may indulge in a Netflix binge, more dedicated film fans prefer a shelf stocked with physical media. man without fear
A bustling video store in 2009. Photo: Bloomberg/Getty Images
‘This current phase is the worst‘
Rental spaces will once again thrive, though it may take time, bringing a sense of nostalgia for some and a fresh experience for others. As mentioned in the article, there is a resurgence fueled by the revival of vinyl records. The more enthusiasts of the original content and the younger generation realize that they can’t access the authentic material, the more the market will adapt. However, this phase is undoubtedly the most challenging, especially with streaming services pulling titles in multiple directions. Mr username 2014
‘the hype is real‘
I recently canceled my streaming subscription and started collecting “final format” 4K Blu-rays.
The hype is justified. The quality is exceptional, with no discernible drop in visual and audio quality that can happen with streaming. Some discs are particularly well-optimized for the format. Oppenheimer is a prime example (using high-quality headphones and viewing on a 4K disc makes for a very satisfying 3-hour experience). The advent of Villeneuve is also commendable.
As a gamer, I rarely have time to dedicate to playing for more than 20 hours nowadays, so having a PS5 gives me something to engage with. blue jay 2011
‘Household finances are stretched‘
Speaking personally, I believe the streaming industry will eventually rue its efforts to lock in customers. Unfortunately, household budgets are tight, and the cost of subscribing to streaming services adds up. And it’s not just me – there are numerous services vying for attention, leading to decision fatigue.
When movies and similar content are sold on DVD or Blu-ray, the consumer is committing to a one-time purchase. As a result, these companies, and the film industry as a whole, may end up forfeiting a significant portion of their downstream revenue while also being under pressure to ensure customer satisfaction. As this discussion underscores, many of us still yearn for the ability to purchase movies in physical formats. buzz 2023
‘I have reverted‘
Honestly, I shifted to streaming platforms for movies and music for a while, but I found myself reverting back. Not only did the platform remove content I desired (movies and shows), but (especially when it came to music) changing platforms essentially meant I was “purchasing” music when I wasn’t truly owning it. I decided to change my approach. I lost money and didn’t actually possess my music. Because I had never truly bought the music in the first place, my wallet disagreed with the arrangement. That realization made me uneasy about the entire situation. Additionally, DVDs turn out to be much more cost-effective to own. Beacon of Hope Discount
‘very cluttered‘
It’s quite cluttered. I keep the CDs in a disc folder and discard the cases. While some may consider it sacrilege, it’s a satisfying compromise for me. Seven Highter
‘I’m not fixated on the format‘
Having films in digital format is too convenient for me to go back to physical formats. I do, however, continue to buy DVDs and Blu-rays of movies that aren’t digitized, but it’s a hassle to remove the DVD from its case, go to the DVD player, and start it up. …With digital media, you can initiate a movie in moments, regardless of your location. I’m not hooked on any particular format or medium. The main desire is to be able to watch our favorite movies whenever and wherever we want, and digital media is the best option for that. bf_Silver Town
‘I wasn’t intrigued until DVDs were introduced‘
Collecting movies was never as popular as amassing books or music (CDs, records, tapes). I had no inclination toward it until DVDs made their debut.
What I miss about the rise of physical media is the ability to visit someone’s home, peruse their collection of books, records, and DVDs, and discover their diverse interests. It’s a conversation starter. Jifujiji
DVDs on display in HMV stores in London. Photo: David Levin/The Guardian
‘Biggest film loss since the fires in the old studio vaults‘
We are witnessing the greatest loss of films since the fires that ravaged the old studio vaults. While some may argue that inaccessible films still exist somewhere, what if no one is able to view them?
Furthermore, digital formats are subject to frequent changes. Eventually, all digital copies of films will become obsolete. Will Disney or any other entity go to the lengths and expense of transferring all their popular movies to a new format? Possibly.
But will they undertake the arduous and costly task of migrating thousands of potentially forgotten films that haven’t seen the light of day in years and are buried in long-unused databases? Highly unlikely. son of the desert
‘I no longer live like an obsessive hoarder‘
Two years ago, I donated thousands of DVDs and Blu-rays to charity shops. I’ve abandoned the life of an obsessive hoarder and now find more peace of mind. With numerous old and new titles to watch, there are discs in my possession that I’ve never viewed in decades, some of which I’ve even given away while still in their original shrink wrap. Had streaming been available 30 years ago, it might have paid off my mortgage. R Gouveia
‘Film production courses‘
One of the reasons I’ve bought and continue to purchase numerous DVDs over the years is for the bonus content such as director commentaries, behind-the-scenes features, and interviews with cast and crew. While David Fincher’s “Seven” may be available on some random streaming service, the DVD’s commentary track alone is a treasure trove for film enthusiasts. sagarmatha 1953
‘DVDs are delicate and not everlasting‘
I still retain all my DVDs and am actively acquiring new ones. Many movies are not consistently available on streaming services, if at all, hence retaining them as physical media is crucial. The only challenge is that DVDs are susceptible to damage and cannot stand the test of time. The same can be said for DVD players. I’ve contemplated buying a new DVD player as a backup. While I do utilize a streaming service, it often has limited offerings and I struggle to find what I’m looking for, particularly when it comes to “older” movies from the 1920s, 1930s, and 1970s. Recently, I revisited the original “Ladykillers” – the remakes just don’t compare. about
‘It’s not an either-or situation‘
For me, it’s not about choosing one over the other. Streaming (via the usual platforms) has its place. It allows for discovering new movies or trying something different. Physical media, on the other hand, enables me to build my collection of movies that I can’t stream or that I prefer to own while watching them again. iron moog 007
Salt marshes in Barnstable, Massachusetts show signs of erosion and submergence as sea levels rise (December 2, 2022).Credit: Erin Peck
Creating wetlands, which are being submerged by rising sea levels, remains a challenge, but scientists are now one step closer to identifying a solution.
Amid climate change, large-scale dam removal projects are gaining traction as a solution to the loss of coastal wetlands that reduce flooding, filter water, and provide habitat for wildlife. However, in a recently published paper, scienceresearchers concluded that this strategy does not work in most rivers in the United States.
Limited sediment supply hinders wetland recovery
The reason is that there is not enough sediment. Of the nearly 5,000 rivers analyzed, nearly three out of four were unable to transport enough sediment to keep up with sea level rise in the coastal regions they connect to. Nearly half were at least 10 times short of the required amount of sediment.
This is the first national study to examine how much watershed sediment can be deposited in coastal areas by rivers. So far, research has focused on a few very large rivers. mississippi,and, Elfa In Washington, they are not representative of most other areas of the continental United States.
Most watersheds in the United States are small and are not major sources of sediment buildup in wetlands, researchers said. It is on these small rivers that most dams are located.
Expert insights on dam removal and sediment supply
The study was led by Dr. Scott Ensign, a research scientist at the Stroud Water Research Center, a nonprofit organization that studies freshwater streams and rivers around the world. He said: “Elfa is the poster child for dam removal projects that restore coastal sediment, and for good reason: it liberated vast amounts of sediment and sand.
“However, rivers along the East and Gulf coasts are not as steep as the West Coast and there is less sediment that can reach the wetlands, so the wetlands are wider and require more sediment to keep them above the rising ocean.” is required.Basically, the numbers don’t add up.”
Dr. Christopher Craft, an Indiana University professor who focuses on wetland restoration and climate change, said, “The extensive and comprehensive spatial analysis conducted by the authors shows that sediment supply in most coastal basins is This strongly suggests that this is insufficient.” As sea levels rise, tidal wetlands appear. In other words, sediment cannot save them. ”
Methodology and findings
Ensign and her co-authors, Joanne Halls of the University of North Carolina Wilmington and Erin Peck of the University of Massachusetts, used publicly available data from the U.S. Geological Survey and the National Oceanic and Atmospheric Administration to map watersheds to coastal wetlands. Sediment supply was modeled. Uses Esri’s ArcGIS Pro technology. They then compared their projections to previously reported rates of change for tidal wetlands across the United States.
“By and large, the sediment that saves most wetlands from drowning doesn’t come from upstream rivers. In many places on the East Coast, removing dams won’t help. You’ll have to look elsewhere.” explained the lieutenant.
Impact on wetland conservation
Dr. James Pizzuto, a professor of geological sciences who specializes in river science at the University of Delaware, said the researchers deftly addressed a complex problem. “These results, and the local variations documented by mapping the entire U.S. coastline, provide important guidance to managers and scientists, and future efforts to investigate other processes beyond basin sediments. “We are documenting where we should focus our efforts,” he said.
Such efforts include finding ways to retain more mineral deposits, plant material and organic carbon in wetland soils, said Donald F. Boesch, professor emeritus at the University of Maryland Center for Environmental Science. He explained that it was possible. “This is true both where sediment is being depleted and where it is being diverted to construct and maintain wetlands with relatively high rates of sea level rise, such as the Mississippi Delta,” he said. ” he said.
Future research and conservation strategies
Future research is needed to measure how much sediment is trapped behind a particular dam and accurately predict the impact on downstream tidal wetlands.
“In general, the most important action to protect tidal wetlands is to allow them to move up slopes. In some areas, we need to restore natural hydrology and protect lowlands,” said Ensign. Direct application of deposits and other engineering approaches may also be helpful at very local scales.”
References: Scott H. Ensign, Joanne N. Halls, and Erin K. Peck, “Catchment Sediments Cannot Offset Sea Level Rise in Most U.S. Tidal Wetlands,” December 7, 2023. science. DOI: 10.1126/science.adj0513
The National Science Foundation funded the research.
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