Saturday, April 27, 2024

 

Anthropologist documents how women and shepherds historically reduced wildfire risk in Central Italy




UNIVERSITY OF CALIFORNIA - SANTA CRUZ




In the last several decades, large forest fires have increasingly threatened communities across the Mediterranean. Climate change is expected to make these fires larger, hotter, and more dangerous in the future. But fire management lessons from the past could help to improve the resilience of local landscapes. 

The latest research paper from environmental anthropologist and University of California, Santa Cruz Professor Andrew Mathews explores these issues in the Monte Pisano region of Central Italy. In particular, Mathews found that peasant women, who historically collected leaf litter in the forests, and shepherds, who grazed their flocks and conducted occasional managed burns, were critical in maintaining fire-resistant landscapes. Yet the social status of these groups meant the importance of their work went unrecognized.

In Monte Pisano and much of the broader Mediterranean, forests and other plant communities have been shaped by thousands of years of intensive human management of the land. But migration to cities since the 1960s has left rural lands increasingly abandoned. And without people to maintain them, local forests have become overgrown with highly flammable brush. 

At the same time, many traditional rural land management practices that may have once reduced fire risk in the region have been systematically ignored and even criminalized over the years, to the point where they have been all but forgotten. 

Luckily, though, there are a few people who still remember. Mathews and his research team sought out elderly people who were born between 1928 and 1956 in the Monte Pisano region and conducted oral history interviews to learn about traditional land management practices. In particular, the researchers asked about activities like collecting leaf litter, livestock grazing, and managed burning, which historical records suggested may have once been common. 

“The people we interviewed were actually kind of excited to tell us these stories,” Mathews said. “Most people don't really ask them detailed questions about their daily lives from when they were younger, so they enjoyed retelling the stories, and they were such brilliant, thoughtful, interesting people. They were a lot of fun to talk to.”

Research participants described how forests were once full of human activity. Leaves were raked for use as stable bedding and fertilizer for olive groves. Logs and brush were collected for firewood and kindling. People gathered herbs, berries, and mushrooms in the forest, and sheep ate the grasses. Every scrap of wood or vegetation had a use, so the forest floor was almost bare in some places, and forests had an open, park-like appearance. 

Meanwhile, in nearby pastures and olive groves, the buildup of grasses, brush, and brambles was kept under control through a combination of livestock grazing, manual brush cutting, and occasional managed burning. And whenever a wildfire sprang up in the forest, someone was always nearby to quickly extinguish it. 

These historical accounts of the landscape were “an extraordinary difference” from what Matthews observed during forest transect walks in Monte Pisano in 2014. He and a botanist assistant recorded dense scrub and thick leaf litter, plus abundant fallen branches and brush that could easily act as “ladder fuels,” enabling flames to spread from the forest floor to the treetops.

Mathews wanted to estimate how much of this difference between modern and historical landscapes could reasonably be attributed to past land management practices. Since sheep were central to many of those practices—like leaf litter raking for stable bedding and grazing herds of sheep in forests—he started by comparing accounts from his oral history interviews with historical agricultural records to estimate the historical number of sheep per hectare of land in the region. 

prior study had modeled historical biomass removal in the Valais region of Switzerland for similar activities and a roughly comparable sheep-to-land ratio. So, based on the lowest estimates from that prior research, Mathews calculated that leaf litter raking alone could have historically extracted about 30-40% of the vegetation produced annually within the forest, with additional vegetation removal resulting from grazing, firewood collecting, and other activities. 

These effects would have dramatically altered the landscape, leaving very little fuel for forest fires. Yet Mathews found that most people in the region today have very little awareness of these traditional land management practices that historically reduced fire risk. The research team interviewed local residents, firefighters, and government officials and observed community events to see what people understood about the history of local fire management. 

“There was almost a complete disconnect,” Mathews said. “People have a general idea that landscape abandonment is a problem, but most have no idea that there was a history of controlled burning and care that made the landscape less flammable.”

The causes of this collective forgetting are rooted in historical politics of classism and sexism, Mathews’ research suggests. 

Leaf litter raking and other land management activities were conducted by peasants, and oral history interviews further showed that it was typically women and children who did this work. The state considered peasant practices to be backwards and outdated amidst a push for agricultural modernization. And forestry policies that focused heavily on timber production led to the banning and stigmatization of traditional managed burning. 

“Leaf litter raking was disregarded by the state because no one was earning money from it, and it was ‘women’s work’ being done by ‘unimportant’ people,” Matthews explained. “Similarly, shepherds, who were often the ones doing managed burning, have a long history of being stereotyped and regarded with suspicion across the Mediterranean. So the government never understood what they were doing or thought it was helpful.” 

Mathews believes that communities around the world can learn from Monte Pisano’s traditional fire management practices, as well as from the consequences of forgetting them. He says that landscape abandonment similar to what took place in Italy in the mid- to late- 20th Century is currently happening in parts of Africa and South America. With that, there’s been a decrease in traditional managed burning on a global scale. 

“We tend to think of fire as increasing around the world due to climate change, but at the same time, these traditional types of smaller, controlled fires are actually decreasing,” he said. “We should think hard about the impacts of eliminating agropastoral burning, because, in the end, it's likely to come back and bite us in the form of much larger fires.” 

New offshore wind turbines can take away energy from existing ones



UNIVERSITY OF COLORADO AT BOULDER
CU Boulder team set up a wind measurment device near Rhode Island in December, 2023 

IMAGE: 

A WIND LIDAR FOR COLLECTING DATA ON WIND ENERGY, WEATHER AND AIR MOVEMENTS.

view more 

CREDIT: JULIE LUNDQUIST/CU BOULDER




As summer approaches, electricity demand surges in the U.S., as homes and businesses crank up the air conditioning. To meet the rising need, many East Coast cities are banking on offshore wind projects the country is building in the Atlantic Ocean.

For electric grid operators, knowing how much wind power these offshore turbines can harvest is critical, but making accurate predictions can be difficult. A team of scientists at the University of Colorado Boulder and their collaborators are working to tackle the challenge. 

In a new paper published March 14 in the journal Wind Energy Science, a team led by Dave Rosencrans, a doctoral student, and Julie K. Lundquist, a professor in the Department of Atmospheric and Ocean Sciences, estimate that offshore wind turbines in the Atlantic Ocean region, where the U.S. plans to build large wind farms, could take away wind from other turbines nearby, potentially reducing the farms’ power output by more than 30%. 

Accounting for this so-called “wake effect,” the team estimated that the proposed wind farms could still supply approximately 60% of the electricity demand of the New England grid, which covers Connecticut, Maine, Massachusetts, New Hampshire, Rhode Island, and Vermont.

“The U.S. is planning to build thousands of offshore wind turbines, so we need to predict when those wakes will be expensive and when they have little effect,” said Lundquist, who is also a fellow at CU Boulder’s Renewable and Sustainable Energy Institute. 

Understanding the wake effect

When wind passes through turbines, the ones at the front, or upstream, extract some energy from the wind. As a result, the wind slows down and becomes more turbulent behind the turbines. This means the turbines downstream get slower wind, sometimes resulting in lower power generation.

The wake effect is particularly prominent offshore, because there are no houses or trees that stir up the air, which helps dissipate the wakes, said Rosencrans, the paper’s first author. 

Using computer simulations and observational data of the atmosphere, the team calculated that the wake effect reduces total power generation by 34% to 38% at a proposed wind farm off the East Coast. Most of the reduction comes from wakes formed between turbines within a single farm. 

But under certain weather conditions, wakes could reach turbines as far as 55 kilometers downwind and affect other wind farms. For example, during hot summer days, the airflow over the cool sea surface tends to be relatively stable, causing wakes to persist for longer periods and propagate over longer distances. 

“Unfortunately, summer is when there's a lot of electrical demand,” Rosencrans said. “We showed that wakes are going to have a significant impact on power generation. But if we can predict their effects and anticipate when they are going to happen, then we can manage them on the electrical grid.” 

A balancing act

In early 2024, five looming wind turbines off the coast of Massachusetts from the country’s first large-scale offshore wind project delivered the first batch of wind power to the New England grid. More turbines are under construction off the coasts of Rhode Island, Virginia and New York. The Biden Administration has set a goal to install 30 gigawatts of offshore wind capacity by 2030, which is enough to power more than 10 million homes for a year.

Compared with energy sources derived from fossil fuels, wind and solar power tend to be variable, because the sun doesn’t always shine and the wind doesn’t always blow. 

This variability creates a challenge for grid operators, said Lundquist. The power grid is a complex system that requires a perfect balance of supply and demand in real-time. Any imbalances could lead to devastating blackouts, like what happened in Texas in 2021 when power outages killed nearly 250 people. 

As the country continues to expand renewable energy projects and integrates more clean electricity into the power system, grid operators need to know precisely how much energy from each renewable source they can count on.

To better understand how the wind blows in the proposed wind farm area, Lundquist’s team visited islands off the New England coast and installed a host of instruments last December as part of the Department of Energy's Wind Forecast Improvement Project 3. The project is a collaboration of researchers from CU Boulder, Woods Hole Oceanographic Institute and several other national laboratories. 

The instruments, including weather monitors and radar sensors, will collect data for the next year or more. Previously, offshore wind power prediction models usually relied on intermittent data from ships and satellite observations. The hope is that with continuous data directly from the ocean, scientists can improve prediction models and better integrate more offshore wind energy into the grid. 

In addition to the growing demand for air conditioning and heat pumps, electricity consumption in the U.S. has been rising rapidly in recent years because of the increasing prevalence of electric vehicles, data centers and manufacturing facilities. Over the next five years, analyses project that electricity demand in the U.S. will increase by nearly 5%, a substantial increase compared with the estimated annual growth rate of 0.5% over the past decade. 

“We need a diverse mix of clean energy sources to meet the demand and decarbonize the grid,” Lundquist said. “With better predictions of wind energy, we can achieve more reliance on renewable energy.”

 

Curiosity promotes biodiversity




UNIVERSITY OF BASEL
Cyphotilapia gibberosa 

IMAGE: 

CYPHOTILAPIA GIBBEROSA IS ONE OF THE PARTICULARLY CURIOUS CICHLIDS IN LAKE TANGANYIKA. 

view more 

CREDIT: UNIVERSITY OF BASEL, ADRIAN INDERMAUR




Exploratory behavior is one of the fundamental personality traits of animals – and these traits influence their probability of survival, among other things. For example, curious individuals can inhabit different areas in their habitats compared to more cautious conspecifics. At the same time, however, they expose themselves to a greater risk of being discovered and eaten.

Exploratory behavior as a factor in evolution

The cichlids of Africa’s Lake Tanganyika exhibit extraordinary diversity in terms of shape, diet, habitat and coloration. This allows them to inhabit various ecological niches and therefore to engage in less competition with one another. Researchers have long suspected that also curiosity acts as a driver in the formation of new species and therefore biodiversity. Now, a research team led by Professor Walter Salzburger from the University of Basel has used the example of the extremely diverse cichlid fishes of Lake Tanganyika to investigate the role of behavioral differences in adaptation to different ecological niches.

For a total of nine months, first author Dr. Carolin Sommer-Trembo recorded the “exploratory behavior” of 57 different cichlid species at the Southern shore of Lake Tanganyika in Zambia. To this end, the zoologist made video recordings of how the approximately 700 cichlids caught in the lake behaved in a new environment in form of large experimental ponds. She then released the animals back into the wild.

Back in Basel, Sommer-Trembo used these videos to determine which areas of the experimental pond each fish explored within a 15-minute period. “On the whole, large differences in exploratory behavior were observed between the cichlid species, and these differences were also confirmed under laboratory conditions,” says the evolutionary biologist. Detailed analyses of the data revealed a strong correlation between exploratory behavior and the habitat – and body shape – of the respective cichlid species. For example, species that live near the shores, with a bulkybody shape, are more curious than elongated species living in open water. “This puts the focus back on animal behavior as driving force behind key evolutionary processes,” says Sommer-Trembo.

Specific mutations make the fish more curious

In order to investigate the genetic basis of the observed behavioral differences in cichlids, the research team worked together with Dr. Milan Malinsky from the University of Bern to develop a new method for analyzing the existing genomes that allowed them to compare data across different species.

Using their new method, the researchers identified a genetic variant in the genome of cichlids that showed a near perfect correlation with exploratory behavior: species with a “T” at this specific position in the DNA are curious, whereas species with a “C” are less exploratory.

When the researchers used the “genetic scissors” CRISPR-Cas9 to induce targeted mutations in the corresponding region of the genome, the exploratory behavior of the fish changed – they became more curious. Moreover, the team was able to use artificial intelligence and information about the genetic variant, body structure and habitat to predict the exploratory behavior of cichlid species that, initially, had not been examined for their exploratory behavior.

Implications for human behavior?

The genetic variant identified by the researchers is located in the immediate vicinity of the gene cacng5b, which shows activity in the brain. This is the “fishy” version of a gene that is also found in other vertebrates. For example, the human variant is associated with psychiatric diseases such as schizophrenia and bipolar disorders, which may in turn be correlated with personality disorders.

“We’re interested in how personality traits can affect mechanisms of biodiversity in the animal kingdom,” says Sommer-Trembo. “But who knows: ultimately, we might also learn something about the foundations of our own personality.”

Individuals of the species Cyprichromis coloratus have a medium curiosity.

 

Climate change could become the main driver of biodiversity decline by mid-century



Largest modelling study of its kind, published in Science



GERMAN CENTRE FOR INTEGRATIVE BIODIVERSITY RESEARCH (IDIV) HALLE-JENA-LEIPZIG

Bird before the sun 

IMAGE: 

CLIMATE CHANGE COULD BECOME THE MAIN DRIVER OF BIODIVERSITY DECLINE BY MID-CENTURY, ACCORDING TO A NEW STUDY PUBLISHED IN SCIENCE

view more 

CREDIT: OLIVER THIER




Global biodiversity has declined between 2% and 11% during the 20th century due to land-use change alone, according to a large multi-model study published in Science. Projections show climate change could become the main driver of biodiversity decline by the mid-21st century. 

The analysis was led by the German Centre for Integrative Biodiversity Research (iDiv) and the Martin Luther University Halle-Wittenberg (MLU) and is the largest modelling study of its kind to date. The researchers compared thirteen models for assessing the impact of land-use change and climate change on four distinct biodiversity metrics, as well as on nine ecosystem services.

GLOBAL BIODIVERSITY MAY HAVE DECLINED BY 2% TO 11% DUE TO LAND-USE CHANGE ALONE

Land-use change is considered the largest driver of biodiversity change, according to the Intergovernmental Platform on Biodiversity and Ecosystem Services (IPBES). However, scientists are divided over how much biodiversity has changed in past decades. To better answer this question, the researchers modelled the impacts of land-use change on biodiversity over the 20th century. They found global biodiversity may have declined by 2% to 11% due to land-use change alone. This span covers a range of four biodiversity metrics1 calculated by seven different models.

“By including all world regions in our model, we were able to fill many blind spots and address criticism of other approaches working with fragmented and potentially biased data”, says first author Prof Henrique Pereira, research group head at iDiv and MLU. “Every approach has its ups and downsides. We believe our modelling approach provides the most comprehensive estimate of biodiversity trends worldwide.”

MIXED TRENDS FOR ECOSYSTEM SERVICES

Using another set of five models, the researchers also calculated the simultaneous impact of land-use change on so-called ecosystem services, i.e., the benefits nature provides to humans. In the past century, they found a massive increase in provisioning ecosystem services, like food and timber production. By contrast, regulating ecosystem services, like pollination, nitrogen retention, or carbon sequestration, moderately declined.

CLIMATE AND LAND-USE CHANGE COMBINED MIGHT LEAD TO BIODIVERSITY LOSS IN ALL WORLD REGIONS

The researchers also examined how biodiversity and ecosystem services might evolve in the future. For these projections, they added climate change as a growing driver of biodiversity change to their calculations.

Climate change stands to put additional strain on biodiversity and ecosystem services, according to the findings. While land-use change remains relevant, climate change could become the most important driver of biodiversity loss by mid-century. The researchers assessed three widely-used scenarios – from a sustainable development to a high emissions scenario. For all scenarios, the impacts of land-use change and climate change combined result in biodiversity loss in all world regions.

While the overall downward trend is consistent, there are considerable variations across world regions, models, and scenarios.

PROJECTIONS ARE NOT PREDICTIONS

“The purpose of long-term scenarios is not to predict what will happen,” says co-author Dr Inês Martins from the University of York. “Rather, it is to understand alternatives, and therefore avoid these trajectories, which might be least desirable, and select those that have positive outcomes. Trajectories depend on the policies we choose, and these decisions are made day by day.” Martins co-led the model analyses and is an alumna of iDiv and MLU.

The authors also note that even the most sustainable scenario assessed does not deploy all the policies that could be put in place to protect biodiversity in the coming decades. For instance, bioenergy deployment, one key component of the sustainability scenario, can contribute to mitigating climate change, but can simultaneously reduce species habitats. In contrast, measures to increase the effectiveness and coverage of protected areas or large-scale rewilding were not explored in any of the scenarios

MODELS HELP IDENTIFY EFFECTIVE POLICIES

Assessing the impacts of concrete policies on biodiversity helps identify those policies most effective for safeguarding and promoting biodiversity and ecosystem services, according to the researchers. “There are modelling uncertainties, for sure”, Pereira adds. “Still, our findings clearly show that current policies are insufficient to meet international biodiversity goals. We need renewed efforts to make progress against one of the world’s largest problems, which is human-caused biodiversity change.”

1global species richness, local species richness, mean species habitat extent, biodiversity intactness


Improving health communication to save lives during epidemics



African infectious disease expert discusses how effective public health communication is critical for fighting epidemics and saving lives across the African continent



 NEWS RELEASE 
EUROPEAN SOCIETY OF CLINICAL MICROBIOLOGY AND INFECTIOUS DISEASES




During epidemics of Ebola, COVID-19, Zika and other public health emergencies, effective communication of public health messages is crucial to control the spread of disease, maintain public trust, and encourage compliance with health measures. In a new evidence review to be given at this year’s ESCMID Global Congress (formerly ECCMID) in Barcelona, Spain (27-30 April), Dr Benjamin Djoudalbaye from the Africa Centres for Disease Control and Prevention (AFRICA CDC) in Ethiopia, will discuss the challenges and lessons learnt from public health communication strategies during multiple epidemics across the African continent.

Public health communication is critical for the African continent faced with a slew of infectious-disease epidemics and public health emergencies. Between 2001 and 2022, the region reported 1,800 public health emergencies, most of them emerging infectious diseases such as cholera, meningitis, Ebola, measles, yellow fever, Mpox (monkeypox), Zika, Rift valley fever, and COVID-19 [1].

Information about the epidemic, prevention measures, and health guidelines must be clear, concise, easily understandable, and reach a wide audience. As Dr Djoudalbaye explains, “One of the main communication challenges is disseminating accurate and timely information to the public who have limited access to reliable information and communication channels. Compounding the problem is that only around 40% of Africa’s population has access to the internet. This can lead to misinformation and rumours spreading rapidly, undermining public health efforts to control the epidemic.”

Failure to communicate in the over 2,000 local languages spoken across the continent, or to consider cultural norms and beliefs, can lead to confusion, mistrust, and resistance to public health measures. “Recurrent epidemics negatively impact already weak healthcare systems, devastate struggling economies, and can lead to a colossal toll on human life”, says Dr Djoudalbaye. “Developing and applying well-thought-out public health communication strategies requires not only taking into account Africa’s diverse linguistic and cultural landscape, but also addressing these underlying social and economic factors, and engaging with more vulnerable populations who may be at greatest risk of exposure to disease outbreaks.”

Despite these challenges, there have been successful efforts to communicate public health policy during epidemics in Africa. Take the 2014-2016 Ebola epidemic in West Africa and the COVID-19 pandemic. “Rapid response teams were deployed to remote areas to provide information and engage with local communities”, says Dr Djoudalbaye. “This approach helped to build trust, dispel myths, and encourage compliance with public health measures, ultimately contributing to the containment of the epidemic.”

The COVID-19 pandemic has highlighted the need for innovation and flexibility in African countries. As Dr Djoudalbaye explains, “Countries like Ghana, Rwanda, and Senegal have used technology to support their response to the pandemic. Rwanda and Ghana deployed drones to deliver medical supplies and test results to remote areas, while Senegal has used rapid diagnostic kits to test for COVID-19. These countries have also demonstrated flexibility in their response, with the ability to adapt to changing circumstances and implement new policies and protocols as needed.”

Given that around 80% of the population in 33/54 African countries have access to, or own, a mobile phone, text messaging is playing an increasingly crucial role in bridging gaps in communication, reaching underserved populations, and promoting positive health behaviours across the continent [2]. “This means that more people can now be reached with messaging about interrupting infection chains and refuting rumours and misunderstandings about emerging infectious diseases”, says Dr Djoudalbaye. “But there is a lot of inequity in mobile phone ownership when it comes to age and gender, with men twice as likely to own a phone as women and phone ownership declining after the age of 40.”

What more can be done to improve communication during epidemics? According to Dr Djoudalbaye, “It is imperative that governments and health authorities invest in robust communication strategies that are tailored to the needs of the local population and reach a wide audience. This includes making use of a variety of communication channels, from radio and TV to social media (e.g. Instagram or YouTube) and community outreach. Central to this is working more closely with local community leaders, healthcare workers, and civil society organisations to ensure that information is accurate, culturally sensitive, and easily accessible to all.”

Community engagement has been critical in the fight against COVID-19 in African countries, especially vaccine hesitancy. Countries like Uganda and Ghana have used community engagement to spread awareness about the virus, promote preventative measures, and debunk misinformation. In Nigeria, community engagement has helped to combat social stigma and discrimination against COVID-19 patients and healthcare workers.

Ultimately, Dr Djoudalbaye will highlight the importance of providing clear, honest, and credible sources of information to the public. “It is vital that public health authorities make as much use of technology as possible including mobile apps, text messaging, and social media platforms to provide real-time updates on the epidemic and health guidelines. As expressed by The Lancet, ‘There may be no way to prevent a COVID-19 pandemic in this globalised time, but verified information is the most effective prevention against the disease of panic’” [3].

 

Escape the vapes: scientists call for global shift to curb consumer use of disposable technologies



Peer-Reviewed Publication

UNIVERSITY OF PLYMOUTH




Scientists have called for a concerted global effort to stem the tide of disposable electronic technologies – such as vapes – contributing to international waste accumulation and environmental degradation.

Writing in the journal Science, researchers from across the UK have highlighted how disposable vape sales quadrupled in the UK between 2022 and 2023, with consumers now throwing away around 5 million devices each week.

In the United States, 4.5 disposable vapes are thrown away each second, and it is fast becoming an issue replicated right across the world.

One of the main upshots, scientists say, is that vapes and other disposable technologies including mini-fans and single-use headphones often contain valuable resources such as lithium and other rare earth elements.

These elements are increasingly being seen as critical for green industries such as electric vehicles, but their use in existing devices has significantly diminished their global availability.

And while the technology is marketed as recyclable, it is sold without clear recycling instructions and offers minimal incentives to consumers to return the valuable materials once they have finished using them.

To address this, the researchers have called for urgent reform of disposable electronics practices in the technology industry, to avoid continued resource depletion and environmental degradation.

They have also said the premise of disposal electronics and other single-use items should be questioned at its core, and that such products “may be too dangerous in the long term to justify keeping them on the market”.

The letter has been authored by experts in environmental science, materials science, marine biology, consumer behaviour and ethics from Abertay University, University of Dundee, University College London and the University of Plymouth.

Their call comes as world leaders are meeting in Ottawa, Canada, for the fourth session of the Intergovernmental Negotiating Committee (INC-4) convened to negotiate an international and legally binding Global Plastics Treaty.

It also follows recent legislation introduced in countries including the UK and Australia to limit the availability of disposable vapes, as part of a wider drive to reduce the impact of smoking and electronic alternatives.

The letter’s lead author Laura Young, an award-winning environmental campaigner and PhD researcher at Abertay University and the University of Dundee, said: “Right now, we have a narrow and rapidly closing window of opportunity to address the e-waste crisis. Throwaway electronics have entered the mainstream, the prime example being the rise and prevalence of disposable vapes. These small electronic devices promote the casual disposability of precious Earth materials and the creation of excessive amounts of e-waste. Legislative action, most notably the UK Governments commitment to ban disposable vapes, begins to address this, however action beyond a product-by-product, country-by-country approach is required. Therefore, we must now leverage past successes in waste reduction on a global scale, to tackle this crisis before it consumes us.”

Additional quotes from co-authors

Professor Sue Dawson, Professor in Physical Geography at the University of Dundee: “The protection of our environment has never been more important. Unfortunately, we are blighted in the 21st century by a throwaway culture and the desire for single-use items in everyday life. This is typified by disposable vapes, creating waste, litter and impacts in our streets, beaches and water courses. This is not sustainable and therefore banning disposable vapes will go some way to protect our populations health and our natural environment.”

Professor Mark Miodownik, Professor of Materials and Society at University College London: “The publishing of our letter shows the importance of banning disposable vapes to protect the environment.  We recognise that banning products which give millions of people pleasure might seem anti-business. But the companies involved have not acted responsibly. Indeed, what is becoming very clear is that disposability itself is not compatible with a healthy planet.”

Professor Richard Thompson OBE FRS, Head of the International Marine Litter Research Unit at the University of Plymouth: “Throwaway, disposable living is a very recent and regrettable consequence of technological innovation. It is just a few decades since the first single-use plastic products were manufactured, but the associated – and highly persistent – waste now contaminates every corner of our planet. Disposable vapes are among the more recent such items to hit the market and we urgently need to recognise that our appetite for cheap and convenience-driven throwaway goods comes at immense cost to the environment and human health.”

Dr Rebecca Wade, Senior Lecturer in Environmental Science at Abertay University, said: “In our letter we state that ‘the premise of disposal electronics should be questioned at its core’. This is a critical cross-sector agenda. As soon as we take a step back from the commercial opportunities and so-called convenience of disposal tech we see the problems writ-large. They range from obvious short-term issues such as littering and the associated harm to the environment and wildlife, to refuse management and long-term issues of global resource depletion. Our planet, our societies and the future of our technological industries cannot afford to squander our precious resources in single-use products.”

 

Could fishponds help with Hawaiʻi’s food sustainability?



Peer-Reviewed Publication

UNIVERSITY OF HAWAII AT MANOA

Structure at Heʻeia fishpond, Oʻahu 

IMAGE: 

A HALE (STRUCTURE) AT HEʻEIA FISHPOND, OʻAHU

view more 

CREDIT: ANNE INNES-GOLD




Indigenous aquaculture systems in Hawaiʻi, known as loko iʻa or fishponds, can increase the amount of fish and fisheries harvested both inside and outside of the pond. This is the focus of a study published by a team of researchers at the University of Hawaiʻi at Mānoa Hawaiʻi Institute of Marine Biology (HIMB). Today, aquaculture supplies less than 1% of Hawaiʻi’s 70 million pounds of locally available seafood, but revitalization of loko i‘a has the potential to significantly increase locally available seafood. 

According to historical accounts, loko i‘a can create surplus fish inside the pond, but their role as a nursery ground seeding surrounding fish populations has received less attention.

“We have demonstrated the ability of Indigenous aquaculture systems to produce a surplus of fish as well as supplement fisheries in the surrounding estuary,” said lead author and marine  biology PhD candidate Anne Innes-Gold. “We have heard people voice the idea that historically, loko iʻa provided nursery grounds that may have supplemented fish populations in the estuary. Our study is the first that we are aware of to demonstrate this idea in academic literature.”

Hawaiʻi’s unique aquaculture system

The Indigenous aquaculture systems found in Hawaiʻi boast a design found nowhere else in the world, and are among the most productive and diverse of their kind. Loko i‘a historically yielded nearly 2 million pounds of fish annually, and hoaʻāina (land tenants) and kiaʻi (caretakers) initially managed them with a “take what you need” mentality to ensure the resource persisted. Most loko i‘a were destroyed in the 20th century, and by 1994 only six of 500 historical loko i‘a were still operating.

“As aquaculture continues to provide a growing proportion of our seafood globally, revival of Indigenous aquaculture systems will be beneficial to sustainably maintain and increase our seafood supply,” said Innes-Gold.

Restoration success story

One success story of loko iʻa restoration is the Heʻeia Fishpond, located in Windward O‘ahu and stewarded by Native Hawaiian nonprofit, Paepae o He‘eia. Their mission is to link Indigenous knowledge with contemporary management to promote cultural sustainability and restore and maintain a loko i‘a for the local community. The benefits of restoring loko i‘a and related systems can help boost local food production, and provide community members with a space to nourish their bodies and minds, connect with ‘āina, practice reciprocity and promote cultural education.

This work was funded by Hawaiʻi Sea Grant, the Heʻeia National Estuarine Research Reserve, and the National Marine Fisheries Service-Sea Grant Fellowship in Population and Ecosystem Dynamics. With their foundational work complete, Innes-Gold and her team plan to simulate potential climate change impacts in a loko iʻa system.

An aerial view of Heʻeia fishpond, on the windward side of Oʻahu, Hawaiʻi. 

CREDIT

Keliʻi Kotubetey, Paepae o Heʻeia