Thursday, May 29, 2025

DEI

Gender-sensitive data brings more depth to marine spatial planning




University of California - Santa Barbara

(Santa Barbara, Calif.) — When considering how to use marine spaces and allocate resources to their management, policymakers would do well to take a gender-sensitive approach. So say UC Santa Barbara researchers and their collaborators in a study published in the journal Marine Policy. According to their findings, globally, men and women tend to use the ocean in different ways, with implications for how marine spaces are used and valued.

“Obviously, gender can come into any facet of life, but marine spatial planning is not often looked at through that lens,” said Abigail Vath Meyer, a geospatial developer in the Will McClintock Lab at UCSB’s National Center for Ecological Analysis and Synthesis, and lead author of the study. Marine spatial planning is a stakeholder-centric process by which a country’s marine areas, both on and offshore, are assessed and allocated for the purpose of meeting environmental, social and economic objectives.

However, while collecting ocean use data as part of efforts to conduct marine spatial planning around the world, Meyer and fellow researchers noted patterns in ocean area use by gender — patterns that were relevant to equitable marine planning and governance. They note their findings across three case studies in the Maldives, the Azores and Belize. The data was gathered using the marine spatial planning application SeaSketch, developed in the McClintock Lab. 

“We found women on average were using the ocean closer to shore than men,” Meyer said of the results. This tendency has been found in fisheries research before, Meyer explained, but the effect was found also in other sectors, economic/noneconomic and extractive/non-extractive. Gender differences with regard to ocean use exist in some form throughout the world, in both developed and developing countries, and in fact frameworks for marine spatial planning efforts, such as the EU’s marine spatial planning directives call for consideration of gender based differences in planning, McClintock added, “but the key thing is that geospatial information that shows specifically where in the oceans that occurs is scant to nonexistent.”

Indeed, generally speaking, women in these countries had less formal participation in the fishing economy or other maritime industries, which was dominated by their male counterparts, according to the study. They were far more active in indirect ways, such as gear prep and catch processing, as well as in less formal subsistence, artisanal and recreational fishing. As a result, in selecting the zones they value, women tended to place the most value on areas that were onshore or just offshore, and not just for fishing — some of these areas are also valued culturally as community spaces and as safe zones for their children. Because informal uses are harder to capture than more official and commercial uses that come with documentation, women’s ocean uses tend to be invisible, leading, the study says, “to an undervaluation of their roles in the maritime and blue economy.”

“If you’re not looking at these nearshore or onshore-related stakeholders, you can miss out on this larger perspective and a lot of the value that people place on the ocean,” Meyer said. “If you’re not identifying all of the ocean users, you can leave people out of the process.” This is especially important in the realm of marine spatial planning, where planners have to, with input from the communities, try to make sure the values that users ascribe to certain marine spaces are compatible with their assigned uses, while also meeting economic, social and environmental goals for a country’s marine areas. For instance, Meyer said, a marine area that users value for noneconomic benefits, such as culture and community, could be more easily compatible with a marine protected area designation, whereas an area that is heavily commercially used would “lead to a more difficult conversation about marine protection in that area.”

In the three countries studied, men dominate the data — they are the most intense and the most represented users of the ocean. However, this new focus on gender equitable marine spatial planning has led at least one country — Belize — to take a second look at their ocean use data.

“After this research was done, they ended up conducting a second round of ocean use surveys,” Meyer said. “One of the things they were striving for was more female representation in the survey.” Another finding Meyer and team saw was that female recreational fishers around Santa Maria Island in the Azores tended to demonstrate more awareness of, and compliance with marine protected areas — places from which no or limited amounts of catch can be taken, to preserve habitat and fish stocks — than their male counterparts. “That’s incredibly useful in terms of being able to engage more with those fishers, to increase compliance or build a partnership there around the existing marine protected area network,” Meyer said.

Specific gender roles with regard to ocean use, according to the authors, “are highly variable between regions” throughout the globe, “and intersect with marital status, wealth and nationality,” meaning that ocean use surveys in marine spatial planning ought to avoid a “gender-blind” approach, lest planners, stakeholders and governments miss valuable opportunities to enhance livelihoods and solve problems while meeting their shared goals. “Our study shows the spatial patterns of gender uses and values, while demonstrating a technique that could be extended to all coastal nations, developed or developing,” McClintock said.

“One of the main takeaways is that gender-disaggregated data can be very useful and if possible, other places that are doing marine spatial planning should be trying to look through this lens and should be attempting to collect some of this data so women aren’t being unintentionally excluded from the process,” Meyer said. “If planners can see how and where different demographic groups use the ocean, they have the data to make marine plans more equitable for the communities they support.”

Research in this paper was also conducted by Peter Menzies at NCEAS, Marinez Scherer (co-lead author) at University of Santa Catarina in Brazil; Jamani Balderamos and Nidia Chacon at The Nature Conservancy, Belize; Brooke Dixon, Andrew Estep, Shaistha Mohamed, Fathimath Nistharan, Matthew Pauvfe at the Waitt Institute and Adriano Quintela at Blue Azores, Portugal.

 

UK  

Children and young people are waiting longer than necessary for cancer diagnosis, according to new research





University of Nottingham





Dr Shanmugavadivel said: “For the first time, we understand the current landscape of childhood cancer diagnosis in the UK. We can celebrate that ethnicity, sex and socioeconomic status have no impact on time to diagnosis, but there is an urgent need to focus efforts on young people and tumour types such as bone tumours that are still experiencing lengthy intervals. Earliest possible diagnosis is key as time is crucial. Untreated, tumours grow bigger and can spread around the body, requiring more extensive surgery and more intensive therapies to offer cure.”

The study found that the total time to diagnosis from first symptom to confirmed diagnosis varied widely from the same day to several years. The median time to diagnosis was 4.6 weeks, but this varied by age and cancer type. Teenagers (15-18 years) experienced the longest median time to diagnosis (8.7 weeks), whereas infants under one year had the shortest (3.7 weeks).

Among cancer types, bone tumours had the longest median diagnostic interval (12.6 weeks), while kidney tumours had the shortest (2.3 weeks).

Importantly, the study found that factors such as sex, ethnicity, and socioeconomic status did not influence the time to diagnosis.

The researchers also studied the routes to diagnosis, including the number of healthcare visits before a confirmed diagnosis. Most children and young people (74%) had between one and three medical visits before being diagnosed, and two-thirds (67%) were diagnosed in an emergency setting.

The majority first consulted a GP or an emergency doctor. Some cancer types, including Langerhans Cell Histiocytosis (LCH), bone tumours, soft tissue tumours, and brain tumours, were associated with a higher number of medical visits before diagnosis.

This data highlights that, whilst access to diagnosis is equal across different demographic groups, some children and young people, particularly teenagers and those with certain types of cancer, experience longer times to diagnosis.

“The findings will help focus efforts towards closing the gap for these groups, ensuring more children and young people receive a diagnosis sooner,” says Dr Shanmugavadivel. 

“The results will feed into the Child Cancer Smart campaign led by CCLG: The Children & Young People’s Cancer Association, which aims to promote earlier diagnosis, through awareness and education of the public and healthcare professionals.”

Ashley Ball-Gamble, CEO of CCLG and co-author on the study, said: “Childhood cancer knows no boundaries - it affects children and young people of all ages, backgrounds, and walks of life. However, our research has revealed important differences in how long diagnosis takes.

"It's crucial that we understand why certain groups, such as older teenagers, or those with certain cancers, such as bone and brain tumours, are likely to face a lengthier diagnosis. By recognising these differences, we hope to work towards faster diagnoses and improved survival rates."

Dr Sharna Shanmugavadivel has recently been appointed as the Vice-Chair of the Children and Young People Taskforce at the Department of Health and Social Care. The taskforce brings together the country's top experts to set out plans to improve treatment, detection and research for cancer in children and young people, which will feed into the National Cancer Plan. 

Dr Shanmugavadivel adds: “We are grateful to have the opportunity to use this data as a community through the Children and Young People Cancer Taskforce to develop recommendations for the National Cancer Plan so that we can continue to monitor progress whilst developing policy, professional and public health strategies to accelerate diagnosis.”

 

USTC reveals how deep-focus seismicity controls Changbaishan volcanism




University of Science and Technology of China

USTC Reveals How Deep-focus Seismicity Controls Changbaishan Volcanism 

image: 

The tectonic background and seismic activity characteristics of Northeast China and its surrounding areas. (Image by USTC)

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Credit: USTC




A research team led by Prof. ZHANG Haijiang from the University of Science and Technology of China (USTC), in collaboration with Dr. Robert Myhill from the University of Bristol, utilized tele-seismic double-difference tomography technology to uncover the morphological changes of the Pacific subducting slab in the mantle transition zone beneath Northeast China. In addition, they also reported its controlling effects on Changbaishan volcanic field (CVF) volcanism and deep earthquakes. This study was published in Nature Communications.

Cenozoic volcanoes are widely distributed in the northeast region of China, among which the CVF is the largest one. The CVF is a typical intraplate volcano. Currently, the formation mechanism of the CVF is still controversial. In addition, there is another remarkable geological feature in northeast China, a deep earthquake cluster about 300 km east of the CVF. It is usually thought that the formation mechanisms for deep earthquakes include dehydration embrittlement, adiabatic shear instability and so on. These mechanisms are mainly controlled by temperature conditions, but the thermochemical structure of the subduction zone along the strike remains basically unchanged in Northeast Asia. Hence, it is also unclear why the deep earthquakes concentrate in CVF.

The researchers utilized seismic arrival data from the Northeast Asia region received by global seismic stations, and constructed a high-resolution three-dimensional velocity model of over 1000 kilometers in depth using multi-scale double-difference tomography.

The results indicated that beneath the CVF, there was a phenomenon of a subducting slab locally inserting into the lower mantle, while its northern and southern sides were stagnant in the mantle transition zone.

The regions where the subducting slabs descend coincide with the local depressions of the 660-kilometer discontinuity interface in the mantle transition zone obtained from receiver function imaging.

The morphology changes of the subducting slabs from lying flat to descending and then to lying flat again from north to south within the mantle transition zone provides space for the upwelling of hot material beneath the slab, thus providing a deep mantle source for the volcanic activity of CVF.

In addition, the deep earthquake clusters concentrated along the curved part of the Pacific plate where it subducted through the 660, suggesting that the localized strong deformation produced by the slab when it subducts locally was the key mechanism for the occurrence of deep earthquakes.

This discovery provides a new perspective on the physical mechanism of deep-source earthquakes, and for the first time unifies the CVF volcanism with deep-source earthquakes, attributing them to the deep dynamical processes caused by the partial subduction of the Pacific plate through the 660-kilometer interface.

 

USTC reveals how tidal forces affect seismic wave speed within fault zone




University of Science and Technology of China
USTC Reveals How Tidal Forces Affect Seismic Wave Speed Within Fault Zone 

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Schematic illustration of the tidal force affecting the seismic wave velocity variation in a fault zone. (Image by USTC)

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Credit: USTC





Seismological research is directly related to the incubation, occurrence, and evolution of earthquakes. Scientists seek to reveal potential earthquake precursors by monitoring the stress state of fault zones, thus providing bases for earthquake prevention and mitigation. It is hard to measure the stress in-situ, while changes in seismic wave speed can reflect changes in the zone. Hence, temporal variation monitoring of wave speeds becomes an important means of detecting medium changes. Moreover, there is little high-resolution observation on how tidal forces affect the changes in seismic wave speed within the fault zone over time.

In a study published in National Science Review, a research team led by Professor YAO Huajian from the University of Science and Technology of China (USTC) of the Chinese Academy of Sciences (CAS) revealed the significant impact of tidal forces on the changes in seismic wave speeds in the fault fracture zone by monitoring the temporal changes in seismic wave speeds.

The research team utilized continuous noise data collected from a dense seismic array located in Anninghe fault zone, Qinghai-Tibet Plateau, southwest China, combined with seismic interferometry technology, to calculate the seismic wave velocity changes in the underground medium of the Anninghe fault zone area.

They reported that the wave velocity changes have distinct diurnal and semi-diurnal cycles, and these periodic changes are more pronounced within the fault fracture zone.

In addition, after removing the environmental factors, there are also significant monthly periodic changes within the fault fracture zone. The researchers compared the results of wave velocity changes with theoretical tidal strain, and found that both showed good correlation in diurnal, semi-diurnal, and monthly periodic components, indicating that this periodic change is mainly affected by tidal forces.

We applied the standard spectral ratio (SSR) method to the observed east-west ground motions from the selected local and teleseismic earthquakes. It showed that due to the amplification effect, the amplitude spectrum ratio in the fault fracture zone was significantly higher than that in other areas, indicating that the degree of medium fragmentation in this area was higher.

The tidal force affected the seismic wave velocity variation by causing the periodic opening and closing of micro-cracks in the underground medium. Generally, the wave velocity decreased when the cracks were open and increased when the cracks were closed.

Since the degree of medium fragmentation in the fault fracture zone was higher and the micro-cracks were more developed, this area was more sensitive to the tidal force, resulting in more significant observed wave velocity changes.

In this study, the monitoring method based on continuous ambient noise successfully captured the significant impact of tidal forces on the structure of the fault fracture zone, revealing the disturbance of the tidal force on the internal stress field of the fault zone during the period without earthquake occurrence.

This study provides an important means for constructing a time-varying geophysical comprehensive observation system for active fault zones.

 

Sharks rarely seen together may be up for sharing a meal too good to miss



Oceanic whitetip and tiger sharks peacefully co-fed on a carcass close to Hawaii’s Big Island. Such extremely rare observations could help scientists understand shark ecology better.



Frontiers

Sharks feeding 

video: 

At least nine oceanic whitetip sharks and five tiger sharks were spotted feeding on the carcass. Credit: Kayleigh Grant.

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Credit: Kayleigh Grant





Many sharks, particularly those that live in the open oceans, are hunters rather than scavengers. Despite this, a small portion of their diet comes from scavenging, a behavior they may engage in when the opportunity arises.

Now, writing in Frontiers in Fish Science, researchers have described an unusual aggregation of sharks coming together to feed on a carcass that had decayed to mostly flesh and blubber.

“To our knowledge, this is the first study to document a feeding aggregation of tiger sharks and oceanic whitetip sharks scavenging concurrently, and peacefully, on a carcass,” said first author Dr Molly Scott, a marine researcher at the University of Hawaiʻi at Mānoa. “These species are rarely seen together in the wild because of the vastly different habitats they occupy.”

Feast in peace

Oceanic whitetips, a threatened species growing to an average of two meters in length, are solitary sharks, highly migratory, and spend most of their time roaming the oceans. This choice of habitat makes them difficult to study. During the spring and summer, however, they seasonally aggregate at Hawaii’s Big Island. Tiger sharks, a slightly bigger, more coastal species growing three to four meters on average, dwell there year-round. “It is incredibly rare for these two species to overlap in space and time,” Scott said.

In April 2024, a tourist boat sighted a heavily decayed carcass about 10 kilometers off the west coast of Big Island. Once in the water, the tourist operators could observe the feeding event for 8.5 hours. During this time, at least nine oceanic whitetip sharks and five tiger sharks were spotted.

“Even though up to 12 individual sharks were feeding intermittently from a very small, highly degraded carcass we did not observe any agonistic inter- or intra-species aggression,” Scott said. “This was surprising to me; I would assume some agonistic behaviors would exist when there are that many sharks attempting to feed around such a small carcass. But it seems all individuals knew their place in the social hierarchy.”

First servings

Tiger sharks, most likely due to their larger size, were the dominant species. All tiger sharks, except one smaller female, and the two largest oceanic whitetips were observed most frequently feeding directly on the carcass. The smaller sharks stayed under the surface and fed on scraps drifting away. It is possible that they were attracted to the scene because of the scraps and regurgitations left behind by the larger tiger sharks, the researchers said.

There might have been other reasons for some sharks getting first servings, too. “Some individuals, like the female tiger shark, may have been shier or less bold, likely again due to her size. Also, with the other sharks having established the feeding hierarchy before the female tiger shark arrived, maybe she didn’t feel too welcome to get in on the action,” Scott explained.   

The study was conducted over a relatively short time span as the carcass could not be located again the next day. Considering the size of the carcass, a lot of sharks were present, and this research could provide new insights into relationships and social interactions between sharks that don’t normally inhabit the same waters, the researchers said.

For humans, they said, it can perhaps provide a new perspective on sharks. “There were between two and three humans in the water at all times filming more than 12 sharks feeding. None of the photographers reported any scary, aggressive, or harmful interactions with the sharks,” Scott concluded. “I hope this provides a new perspective that sharks are not the human-eating predators they are made out to be.”

Feeding shark [VIDEO] |

Feeding shark. Credit: Kayleigh Grant. 

Feeding sharks [VIDEO] |

The feeding event could be observed for 8.5 hours. Credit: Kayleigh Grant. 

Feeding sharks [VIDEO] | 

Up to 12 individual sharks were feeding intermittently from a very small, highly degraded carcass. No agonistic inter- or intra-species aggression was observed. Credit: Kayleigh Grant. 

Feeding sharks [VIDEO] | 

Up to 12 individual sharks were feeding intermittently from a very small, highly degraded carcass. No agonistic inter- or intra-species aggression was observed. Credit: Kayleigh Grant.

Male tiger shark at the scene. Image: Andrew Aggergaard.