Saturday, September 28, 2024

 AMERIKA'S GUN OBSESSION








Firearm laws restricting large-capacity magazines effective in reducing child deaths in mass shootings



Research presented during the American Academy of Pediatrics 2024 Conference & Convention analyzes how different state laws impact mass shooting deaths




American Academy of Pediatrics




ORLANDO, Fla.-- The only firearm restrictions found to be effective in reducing mass shootings involving children were laws banning the sale of firearms equipped with a large-capacity magazines, according to a new analysis presented during the American Academy of Pediatrics 2024 National Conference and Exhibition.

Researchers will present, “Do State Gun Laws Affect Pediatric Mass Shootings? A 2009 - 2020 Year Analysis,” during the AAP conference held at Orlando Convention Center Sept. 27-Oct. 1.

For the eight states that adopted large capacity magazine bans, the odds of a child dying from a mass shooting was decreased by 91%, according to an abstract. In contrast, the most common laws – which include restrictions on gun purchasing or the possession of firearms around children in a school setting – failed to show a significant decrease in child deaths due to mass shootings.

“Mass shootings are horrific events. We found that large capacity magazine bans may have the biggest effect on reducing child deaths in mass shootings,” said Stephanie Chao, MD, FAAP, senior author of the study. “We hope that research like ours can help legislators to make informed choices.”

Mass shootings were defined as those with at least four recorded deaths in which one or more of the victims were under age 21 during the years 2009-2020, according to the Everytown for Gun Safety database.  Researchers then analyzed these events by state using 10 categories of gun violence prevention laws: assault rifle bans; large capacity magazine bans; permit requirements; extreme risk protection (Gun Violence Restraining Orders); universal background checks; concealed carry discretionary laws; gun possession; violent misdemeanor history; pediatric population; and child access barriers.

The research identified 131 pediatric mass shootings from 2009 to 2020. Over that time, laws restricting the sale of large capacity magazines were associated with the greatest significant reduction of child deaths in mass shootings. During the time of the study, large capacity magazine bans had been adopted by only eight states (CA, CO, CT, MD, MA, NJ, NY, VT). Today, 14 states have laws banning firearms equipped with large capacity magazines.

The authors note that the study was limited to the effects on pediatric mass shootings and should not be interpreted to be generalizable to all pediatric or adult firearm related deaths.

Pamela Emengo, Postdoctoral Research Fellow, is scheduled to present the research (abstract is below) during the Session: (H3032) Council on Injury, Violence, and Poison Prevention, Sunday, Sept. 29, 2024

In addition, Pamela Emengo will be among highlighted abstract authors who will give brief presentations and be available for interviews during a press conference from noon-1:30 pm ET Saturday, Sept. 28, in the National Conference Press Room, W208 AB. During the meeting, you may reach AAP media relations staff at 407-685-5401.

 

Please note: only the abstract is being presented at the meeting. In some cases, the researcher may have more data available to share with media, or may be preparing a longer article for submission to a journal. 

 

# # #

 

The American Academy of Pediatrics is an organization of 67,000 primary care pediatricians, pediatric medical subspecialists and pediatric surgical specialists dedicated to the health, safety and well-being of infants, children, adolescents and young adults. For more information, visit www.aap.org. Reporters can access the meeting program and other relevant meeting information through the AAP meeting website at http://www.aapexperience.org/

 

ABSTRACT

Program Name: 2024 AAP National Conference-Abstracts

Submission Type: Council on Injury, Violence, and Poison Prevention

Abstract Title: Do State Gun Laws Affect Pediatric Mass Shootings? A 2009 - 2020 Year Analysis

Pamela Emengo

Palo Alto, CA, United States

In the United States, firearm related injuries have overtaken motor vehicle crashes to become the leading cause of death amongst children. A variety of legislation has been proposed, yet there remains a need for research to demonstrate effective mass shooting firearm policy, especially regarding children. We hypothesize that states with more stringent laws had fewer mass shooting associated pediatric deaths than states with less stringent firearm laws.

We evaluated the Everytown for Gun Safety database from 2009 to 2020 for shootings with at least 4 recorded fatalities where 1 or more of the included fatalities was an individual under the age of 21. We categorized gun prevention laws into 10 groupings involving the following: assault rifle bans (Assault), large capacity magazine bans (Magazine), permit requirements (Permit), extreme risk protection (gvrolawenforcement), universal background checks (Universal), concealed carry discretionary laws (May Issue), gun possession (Possession), violent misdemeanor history (Violent), pediatric population (PEDS), and child access barriers (CAP). After controlling for demographic factors, we used logistic regression and a zero-inflated negative binomial model to analyze the relationship between laws and mass shootings.

We identified 131 pediatric mass shootings from 2009-2020. Laws banning the sale of large capacity magazines were the only laws significantly associated with a reduction in child deaths (OR = 0.09 [95% CI 0.02, 0.47; p < 0.05]). Laws involving restriction of firearms around children (PEDS) were the most commonly found legislation, but failed to show significance in preventing mass shootings or preventing child deaths (p > 0.05). The next highest utilized laws were extreme risk protection laws and universal background checks, yet neither was found to have significance (p > 0. 05) (Figure 1).

Of the parameters we evaluated, laws restricting the sale of large capacity magazines were associated with the greatest reduction of pediatric deaths in mass shootings. Our work is one of the first to analyze how laws impact pediatric mass shootings. Despite a relatively low adoption in the United States, we show how large capacity magazine bans have the potential to prevent pediatric deaths secondary to mass shootings. This study was only limited to the effects on pediatric mass shootings and should not be interpreted to be generalizable to all pediatric or adult firearm related deaths.

Figure 1

 

The percentage of states that have adopted firearm laws from 2009-2020. The percentages to the left of each bar represent the exact percentage of states who had passed the law by 2020

Table 1

 

Description of the law codes analyzed within each law code category


Caregivers underestimate suicide as the leading cause of firearm death: study


Research presented at the American Academy of Pediatrics 2024 National Conference & Exhibition analyzes Colorado survey findings



American Academy of Pediatrics




ORLANDO, Fla.—A study found fewer than one in four Colorado residents living with children at home recognized suicide as the leading cause of firearm death and less than half thought suicide can be prevented, according to research presented during the American Academy of Pediatrics 2024 National Conference & Exhibition.

The study will be published online in the journal Pediatrics Sept. 27, the first day of the conference at the AAP National Conference and Exhibition that runs from Sept. 27-Oct. 1 at the Orange County Convention Center. While most research presented during the conference is preliminary, the study, “Colorado Caregivers’ Perceptions of Firearm Safety and Youth Suicide,” will publish in the October 2024 Pediatrics.

“We are all working toward the same goal of keeping our children safe,” said the lead author, Maya Haasz, MD FAAP, Associate Professor of pediatrics at the University of Colorado School of Medicine. “With this study, we have identified an opportunity to educate families about the preventability of suicide and how limiting firearm access in times of crisis can decrease suicide deaths.”

The study was conducted using data from the 2023 Colorado Firearm Injury Prevention Survey (COFIPS), an annual state-representative survey of Colorado adults conducted by the University of Colorado Firearm Injury Prevention Initiative (Emergency Medicine | Major Programs | Firearm Injury Prevention Initiative (cuanschutz.edu).

The 1,520 adults completing the survey included 512 caregivers with children younger than 18 years in the household. Survey questions assessed firearm storage, perceptions of firearm-related risks, and concerns about suicide among youth

Researchers found that Coloradans living with children in the home underestimated the risk of firearm-related suicide. Additionally, although nearly two thirds of participants were concerned about youth suicide in the community, only one third were concerned about suicide among youth in their own families. Finally, while those living in households with firearms believed that secure storage decreased risk of firearm injury, less than half thought suicide can be prevented and only 60% believed that removing firearms from the home would decrease the risk of injury in times of mental health crisis.

“This is especially concerning when many believe that suicide can’t be prevented by measures such as limiting access to home firearms,” Dr. Haasz said. “It highlights a crucial messaging opportunity – that there are effective ways to decrease the risk of suicide for our youth.”

Dr. Maya Haasz, is scheduled to present her research, which is below, at the Hyatt Regency Orlando, Plaza International Ballroom on September 29, from 12 pm – 1 p. To request an interview with Dr. Maya Haasz, contact the Children’s Hospital Colorado media relations team at media@childrenscolorado.org.

In addition, Dr. Haasz will be among highlighted abstract authors who will give brief presentations and be available for interviews during a press conference from noon-1:30 pm ET the National Conference Press Room, W208 AB. During the meeting, you may reach AAP media relations staff at 407-685-5401.

 

Please note: only the abstract is being presented at the meeting. In some cases, the researcher may have more data available to share with media, or may be preparing a longer article for submission to a journal. 

 

# # #

 

The American Academy of Pediatrics is an organization of 67,000 primary care pediatricians, pediatric medical subspecialists and pediatric surgical specialists dedicated to the health, safety and well-being of infants, children, adolescents and young adults. For more information, visit www.aap.org. Reporters can access the meeting program and other relevant meeting information through the AAP meeting website at http://www.aapexperience.org/

 

ABSTRACT

Program Name: 2024 AAP National Conference-Abstracts

Submission Type: Council on Injury, Violence, and Poison Prevention

Abstract Title: Colorado Caregivers’ Perceptions of Firearm Safety and Youth Suicide

Maya Haasz

Aurora, CO, United States

In the US, 4.6 million households with youth contain loaded and unlocked firearms.1 Household firearms, particularly unsecured household firearms, are associated with increased risk of youth suicide.2,3 This study examined perceptions of firearm risk and suicide among caregivers with and without household firearms.

The Colorado Firearm Injury Prevention Survey was administered by the Ipsos survey firm online in English and Spanish from April-May 2023. Of 1,520 adults completing the survey, we included 512 caregivers (children < 18 years in the household). Survey questions assessed firearm storage, perceptions of firearm-related risks, and concerns about suicide among youth. Likert scales were dichotomized to improve interpretability. We estimated weighted prevalences and 95% confidence intervals (CI), and compared differences between households using weighted chi-square tests. Poststratification weights were applied to make findings representative of Colorado adults. The study was approved by the Colorado Multiple Institutional Review Board.

Colorado caregivers were primarily female (56.4%), aged 25-54 (77.4%), White (87.8%), non-Hispanic (74.9%), and had a child ≤12 years at home (79.3%). Nearly half (45.5%) reported a firearm in the home (Table 1). Among all caregivers, 23.7% correctly identified suicide as the leading cause of firearm death in Colorado, with no difference between groups. Caregivers with household firearms were more likely to believe a firearm in the home made them safer (52.2% vs 22.4%, p< 0.001) and that secure storage reduced the risk of firearm injury. They were less likely to believe that suicide can be prevented (47.8% vs 68.9%p< 0.001), or that temporary removal of firearms decreases risk of firearm injury or death (59.6% vs 77.7%, p< 0.001). Two thirds of caregivers were concerned about youth suicide in their community. Caregivers with household firearms were less likely to be concerned about suicide among youth within their own family (28.1% vs 38.5%, p=0.013) (Table 2).

Less than a quarter of caregivers in Colorado recognized suicide as the leading cause of firearm death in their state. There was more concern for youth suicide in the community than in the family; caregivers with firearms were less concerned about youth suicide in their family than those without. This risk is compounded by a belief that suicide is not preventable and that strategies to mitigate the risk of suicide are not effective. This study has several limitations. Respondents were all in Colorado; results may not be generalizable. Responses may have been impacted by non-response or social desirability bias. The study did not include context that may affect violence risk (ex. neighborhood crime). Our finding that firearm owners believe that secure firearm storage is protective against firearm injury is a promising messaging strategy. Future research should explore effectiveness of preventive messaging in improving perceptions around household firearms and suicide risk.

Firearm culture, perceptions of firearm-related risks, and concern about youth suicide among Colorado caregivers with and without household firearms

Table 1: Sociodemographics of Colorado caregivers with and without household firearms


 

New research offers fresh hope to curb illegal orchid trafficking in Vietnam



Rare, endangered orchids sold by the bushel through social media


San Diego Zoo Wildlife Alliance

Paphiopedilum vietnamense 

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Paphiopedilum vietnamense an orchid naturally occurring in Vietnam

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Credit: All image and/or video uses must bear the copyright notice and/or be properly credited to the relevant photographer, as shown in the image metadata, and must be accompanied by a caption that makes reference to the San Diego Zoo and/or San Diego Zoo Safari Park. Any uses in which the image and/or video appears without proper copyright notice, photographer credit and a caption referencing the San Diego Zoo, San Diego Zoo Safari Park, and/or San Diego Zoo Wildlife Alliance are subject to paid licensing.





SAN DIEGO (Sept. 26, 2024) – Orchids, with their captivating beauty, have become a multi-billion-dollar industry. Unfortunately, many species are on the brink of extinction, particularly in Vietnam, due to unsustainable wild harvesting and minimal enforcement of laws restricting it. 

Lead author of a new study in Biotropica released Sept. 26, Elizabeth Davis, senior researcher in community engagement at San Diego Zoo Wildlife Alliance, and her colleagues at Vinh University in Vietnam, were motivated to dig into this issue after colleague and co-author Heinfried Block, senior plant propagator at San Diego Zoo Wildlife Alliance, observed a high volume of orchid trading occurring within a Vietnamese orchid hobbyist and trader Facebook group. Orchids were being offered for sale in bushels, including extremely rare and possibly Critically Endangered species. 

“I couldn’t believe what I was seeing being sold online, both the species and the volume,” said Block. “We knew we needed to dig into this to better understand the trade and determine ways to stop it.”

While many studies document the extent of orchid trafficking, the motivations of traffickers are a critical but underexplored aspect of the orchid crisis.

“Without understanding the motivating factors, creating sustainable solutions is unlikely,” said Davis. “Our goal with this study is to shed light on the motivation and knowledge gaps among the collectors who are—often unwittingly—contributing to the problem. What we found provides us with hope that we can turn the tide.”

The researchers reveal that many Vietnamese orchid collectors, who sometimes harvest endangered species in the wild, are largely unaware of orchids' dire status and the regulations meant to protect them. Alarmingly, these collectors believe Vietnam still has an abundance of orchids, a misconception that fuels further depletion. 

“We found that these collectors and hobbyists have a high affinity for the conservation of orchids and had no idea that the orchids were in trouble or that harvesting was causing harm. They love orchids and are open to sharing expertise and learning sustainable practices,” said Davis.

“This research is so valuable because it provides directions to change the orchid-consuming behavior of this community,” said Trung Tien Cao, professor at Vinh University and co-author of the study. “There is a gap in awareness between what the orchid community believes, and what the reality is for wild orchids, and we provide suggestions for removing that gap.”

This new research suggests that by understanding the sociological dimensions driving orchid collectors, targeted awareness campaigns and collaborations can be developed, transforming these collectors from the problem into key conservation allies. 

This study offers a roadmap to saving some of the world's most beloved flowers before it's too late. The fate of many orchid species may well depend on this crucial shift in behavior and mindset, and the researchers suggest that orchid collectors in Vietnam are great candidates for such a shift. 

Davis and her colleagues are now working on social media graphics and messaging identified as being likely to change behavior that can be shared on social media within the collector groups, and they have a goal of creating sustainable guidelines for harvesting in the future.

San Diego Zoo Wildlife Alliance is a designated plant rescue center. In its micropropagation lab, the horticultural department propagates critically endangered Paphiopedilum species from Vietnam in vitro. Most recently, the team added seedlings of the Vietnamese Paphiopedilum delenatii, Paphiopedilum malipoense and Paphiopedilum hangianum—offspring from confiscated plants that were given to San Diego Zoo Wildlife Alliance for safeguarding.

 

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About San Diego Zoo Wildlife Alliance 

San Diego Zoo Wildlife Alliance, a nonprofit conservation leader, inspires passion for nature and collaboration for a healthier world. The Alliance supports innovative conservation science through global partnerships and groundbreaking efforts at the world-famous San Diego Zoo and San Diego Zoo Safari Park, both leading zoological institutions and accredited botanical gardens. Through wildlife care expertise, cutting-edge science and continued collaboration, more than 44 endangered species have been reintroduced to native habitats. The Alliance reaches over 1 billion people annually through its two conservation parks and media channels in 150 countries, including San Diego Zoo Wildlife Explorers television, available in children’s hospitals across 14 countries. Wildlife Allies—members, donors and guests—make success possible.

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  • Photos of critically endangered Paphiopedilum species in San Diego Zoo Wildlife Alliance’s micropropagation lab

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Grazing zooplankton severely impacted by nanoplastic particles



Lund University





Researchers at Lund University in Sweden have studied how nanoplastic affects aquatic organisms in lakes and rivers. The results are surprising and the researchers are the first to show that some species are being wiped out, while others – such as cyanobacteria that contribute to algal blooms – are completely unaffected.

Every year, the amount of plastic in the world’s oceans increases by between five and 13 million tonnes. Over time, plastic breaks down into micro and nanoparticles that are invisible to the naked eye. Researchers at Lund University have investigated how these small plastic particles affect organisms in aquatic ecosystems. 

They found that some species of grazing zooplankton, daphnia, which are an important source of food for fish, were particularly vulnerable. Phytoplankton diatoms were also severely impacted. However, other types of algae, such as blue-green algae (cyanobacteria), which contribute to algal blooms, were completely unaffected.

“We don’t yet know why some collapse while others continue to thrive as usual. If the concentrations of nanoplastics increase, even those that can handle a few particles at present will also likely suffer,” says Lars-Anders Hansson, professor of aquatic ecology.

The researchers conducted the study in artificial wetlands, which are made as similar to natural systems as possible. Therefore, the results are likely to be transferable to natural ecosystems. Variations in the impact on different organisms lead to significant changes in the food chain and ecosystem processes, such as fewer grazing zooplankton and more extensive algal blooms.

“The concentrations of nanoplastics we used are low, quite close to the concentrations already present in our waters,” says Lars-Anders Hansson.

The researchers will now continue their experiments to find out how these insidious nanoplastic particles, which can penetrate cell membranes, affect different species in lakes and rivers.

“Taking a broader perspective, our study provides knowledge and the basis for future decision-making on how to deal with the obvious problems posed by plastic, even if it is also an excellent material in many aspects of our everyday lives,” says Lars-Anders Hansson.

 

Project aims to forecast long-term effects of debris transported by natural disasters



University of Plymouth
Project aims to forecast long-term effects of debris transported by natural disasters 

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The confluence of the Alaknanda and Bhagirathi Rivers, which represents the source of the Ganges. Differences in the colour of the water are the result of variations in sediment load, which can be caused by landscape disturbances originating higher in the catchment

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Credit: Matt Westoby/University of Plymouth





Landslides, avalanches and glacial floods can have an immediate and devastating effect on anything in their path. However, a £1million research project is now going to explore their potential to impact communities often located hundreds of kilometres away and many years after an event has originally taken place.

Centred on the headwaters of the Ganges River in the Himalayas, the SUPERSLUG initiative is named after the huge masses of debris created by such natural disasters, sometimes described as sediment slugs when they travel down rivers.

Using a range of novel monitoring technologies and sensors, scientists will develop and test numerical models to provide the most comprehensive predictions yet of where, when and how the long-term impacts of recent and future extreme events might be felt.

The three-year project is being supported with a grant of almost £840,000 from the Natural Environment Research Council, part of UK Research and Innovation.

Led by researchers from the University of Plymouth, with colleagues from the universities of Exeter, Hull, Leeds, Newcastle and Staffordshire, the project will also harness the expertise of academics at the University of Calgary, Indian Institute of Technology Roorkee and the Wadia Institute of Himalayan Geology.

Dr Matt Westoby, Associate Professor of Physical Geography at the University of Plymouth, is the project’s lead. He said: “High mountain regions such as the Himalayas and the Andes are among the most active – and most hazardous – on the planet. The effects of a changing global climate are only going to exacerbate that hazard, with more intense monsoons leading to increased landslide activity, and the retreat of glacial ice cover causing landscape instability and triggering far-reaching floods.

“But while the immediate effects of those events might be felt locally over the space of a few hours, the large volumes of sediment they generate could impact the river systems for a decade and more. We currently know very little about these longer-term legacy impacts, which can be more insidious and reveal themselves after the main source of danger has passed. We urgently need to understand their effects on river catchments and the communities that rely on them for water, power and their livelihoods more generally.”

The project will focus on a 150 km stretch of the Ganges River impacted by the 2021 Chamoli disaster. Initially triggered by a rock and ice avalanche, a fast-moving, debris-laden flood killed more than 200 people with extensive and severe damage being caused across the region, including to valuable hydropower and transport infrastructure.

In the immediate aftermath, scientists from across the world – including many of those involved in the SUPERSLUG project – came together to understand the processes that led to the initial disaster. 

Over the last two years, funding from UK Research and Innovation enabled pilot work in collaboration with in-country partners to better understand the short-term legacy of the disaster, pump-priming the more ambitious SUPERSLUG project.

The new research will use the data gathered during that time, as well as using drones and satellite imagery to monitor changes in the landscape and river system over the space of several years.

It will also employ seismic sensors and wireless ‘smart cobbles’ alongside other complementary techniques, including automatic water level monitoring, to explore how sediment is transported during normal and flood conditions.

This and other information will be used to develop a large-scale digital twin of the river system, which will be used to explore catchment management decisions.

Importantly, the project team will engage directly with communities and authorities in the Ganges region, to ensure their findings are accessible and useful to disaster management professionals, hydropower operators and the wider international academic community.

Professor Tom Coulthard, Professor of Physical Geography at the University of Hull, is also part of the team coordinating the SUPERSLUG project. He said: “Often it’s the rocks, house sized boulders and sheer volume of sediment moved rather than flood water that causes the most damage in these cascading multi-hazard events. It’s thought this mass of sediment released downstream could pass through the system like a wave or slug of sediment, but how long it takes for this slug to move on through is largely unknown. It may be years, decades or centuries – so understanding how long a sediment slug sticks around for is fundamental for managing these events and predicting their impacts.”

 

Forest loss forces langur species to interbreed



New danger for endangered primates


Deutsches Primatenzentrum (DPZ)/German Primate Center

A juvenile hybrid langur in Rema-Kalenga Wildlife Sanctuary, Bangladesh. One can easily recognized the mixture of morphological characters. For examplethe white eye rings of the Phayre's langurs and the golden-brown breast hair of the capped langurs. 

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A juvenile hybrid langur in Rema-Kalenga Wildlife Sanctuary, Bangladesh. One can easily recognized the mixture of morphological characters. For examplethe white eye rings of the Phayre's langurs and the golden-brown breast hair of the capped langurs. Photo: Auritro Sattar

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Credit: Auritro Sattar




Research of the German Primate Center - Leibniz Institute for Primate Research - shows a threatening development for two endangered primate species in Bangladesh: Phayre's langurs (Trachypithecus phayrei) and capped langurs (Trachypithecus pileatus). In mixed groups of these two species, hybrids have been found and genetically confirmed. If hybridization continues, it could mean the extinction of one or both species (International Journal of Primatology).

Over five years (2018-2023), an international team of researchers led by Tanvir Ahmed, a PhD student at the German Primate Center, studied the langur populations in north-eastern Bangladesh. They found that 8 of the 98 langur studied groups consisted of Phayre's and capped langurs, and in three groups, some individuals appeared as a mixture of the two species. Later, researchers analyzed genetic samples of the species in the lab of the German Primate Center, and confirmed one case of hybridization. This langur had a capped langur mother and a Phayre's langur father. Another female with a hybrid appearance showed signs of motherhood, indicating that at least female hybrids are fertile and give birth to young.

Hybridization: A still rare but growing problem worldwide

Hybridization is generally rare among primates but occurs in areas where the distribution ranges of related species overlap. Human activities such as deforestation, habitat fragmentation, hunting and trapping of primates, leading to a thinning of populations and restricting the movements of individuals between local populations, can increase the risk of such hybridization. Tanvir Ahmed, lead author of the study, says: ‘The existence of fertile hybrids is particularly alarming because it suggests that gene flow between these two endangered species could irreversibly affect their future genetic composition.’ Christian Roos, lead scientist of the study, emphasizes the global relevance of the research results: ‘This is not just a local problem. When habitats are destroyed, animals mix unnaturally and form mixed groups and hybridization might occur. This can even mean the extinction of one or both species.’

Urgent need for action: Forest protection and research as the key to conservation strategies

The study also showed that well-protected forests have a higher population density of langurs compared to less protected ones. However, these forests are often too small, too isolated and fragmented to ensure the long-term survival of the species. ‘Forest conservation must become a national priority. If we don't act now, we risk losing not only two monkey species but also an important part of Bangladesh's biodiversity,’ says Tanvir Ahmed. In addition to forest protection, ongoing research is needed to better understand the effects of hybridization and to develop suitable conservation strategies. Dietmar Zinner, co-author of the study, summarizes: ‘This study is a wake-up call. We need more data to develop effective long-term conservation strategies. Further research will help us understand the extent of hybridization, the impact of human activities and how to prevent its worst effects.’

With less than 500 Phayre's langurs and 600 capped langurs in north-east Bangladesh, time is running out for these species. Their survival depends on immediate action, including both forest conservation and creating dispersal corridors for the species between the forests.

The next steps

As part of his doctoral project, which is supported by the German Primate Center and the German Academic Exchange Service (DAAD), researcher Tanvir Ahmed is now focusing on a large-scale genetic study of langur populations and their vulnerability to climate change. The findings should contribute to an adapted action plan for the protection of langurs in Bangladesh.

Original publication

Ahmed T, Hasan S, Nath S, Biswas S, Mithu AI, Debbarma H, Debbarma R, Alom K, Sattar A, Akhter T, Bari M, Siddik AB, Muzaffar SB, Zinner D, Roos C. (2024). Mixed-species groups and genetically confirmed hybridization between sympatric Phayre’s langur (Trachypithecus phayrei) and capped langur (T. pileatus) in northeast Bangladesh. International Journal of Primatologyhttps://doi.org/10.1007/s10764-024-00459-x

Contact and notes for editorial offices

Tanvir Ahmed

E-Mail: TAhmed@dpz.eu

 

Prof. Dr. Christian Roos

Tel.: +49 551 3851-300

E-Mail: CRoos@dpz.eu

 

Dr. Dietmar Zinner

Tel.: +49 551 3851-129

E-Mail: DZinner@dpz.eu

 

Katharina Diederich (communication)

Tel.: +49 551 3851-424

E-Mail: KDiederich@dpz.eu

 

Printable images can be found under the following link: https://medien.dpz.eu/pinaccess/showpin.do?pinCode=fYSxciR0eING

 

How climate change affects deer






INRAE - National Research Institute for Agriculture, Food and Environment

Red deer 

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Red deer in a forest

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Credit: INRAE - Anders MÃ¥rell





Temperature, rainfall, snow and extreme weather events are all factors linked to climate change that directly affect wildlife. Understanding the impact of these factors on the physiology, population dynamics and distribution of different deer species is important for monitoring and protecting them. The scientists involved in this study reviewed 20 years of research on 10 main deer species in boreal and temperate regions: moose, roe deer, wapiti, red deer, sika deer, fallow deer, white-tailed deer, mule deer, caribou and reindeer. Their analysis of 218 articles summarizes general trends of the effects of climate change on the physiology, behaviour and population dynamics of these animals.

Climate change affects deer in many ways

With the overall rise in temperatures, milder winters appear to be advantageous for many deer populations: they use less energy keeping warm and can find food more easily. However, for species living in colder climates such as reindeer or caribou, winter temperature variations can cause snow to melt and refreeze, covering vegetation under an ice sheet that makes the lichens the animals usually feed on inaccessible.

Similarly, hotter and drier summers could exceed deer populations’ physiological tolerances, mainly due to heat stress and parasites. In the short term, the animals’ physical condition could deteriorate; in the long term, some species could move further north, which would change their distribution. This is already happening to moose, the largest deer species and one which is best adapted to cold climates. Moose are quite heat sensitive, and the populations located further south, such as in southern Scandinavia, are more affected by climate change and could disappear from these areas. Some deer species can overcome these issues by seeking refuge in cooler habitats and reducing their daily activities during the hottest hours. However, these responses can negatively affect population dynamics over the long term. When moose and roe deer are subjected to stress, their body mass declines. As the animals get smaller, there can be repercussions on subsequent generations, including reduced population growth.

Finally, warmer spring and autumn temperatures reduce snow cover and depth, which changes the migration timing and routes of caribou and red deer. The animals begin migrating earlier in spring and later in autumn; over time, these species could stop migrating all together.

This review provides a synthesis of how deer react to climate conditions, both now and in the future. The scientists also identified several areas for further research, including the potential impact of extreme weather events, snow type and wetter autumns on deer. These findings should also help wildlife, forest and park managers better understand how deer populations might react to future climate conditions and adapt their population management strategies to protect these animals.