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Earth & Climate

“Native Hubs: How Preserved Vegetation Supports Brunch and Global Food Security”

Preserving strips of native vegetation beside avocado orchards gives insects a buffet of wild pollen when blossoms are scarce, doubling their plant menu and boosting their resilience. Using cutting-edge eDNA metabarcoding, Curtin scientists revealed how this botanical diversity underpins pollination, a service vital to 75% of crops and our brunch-worthy avocados. Their findings urge farmers to weave natural habitat back into farmland to secure food supplies for a swelling global population.

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The future of brunch, as we know it, might depend on patches of native vegetation preserved alongside farmland. New research from Curtin University reveals the hidden role of these habitats in supporting the insects that keep crops – and our breakfast menus – thriving.

The study, published this week, found that insect communities in avocado orchards adjacent to native remnant vegetation foraged on more than twice as many plant species during times when crop flowering was limited. This is a significant finding, as it suggests that preserving natural habitats can enhance the resilience of insect communities and contribute to greater food security.

Lead author Dr Joshua Kestel explained that their research used a novel method – environmental DNA (eDNA) metabarcoding – to quantify the diversity of pollen collected by entire insect communities. This approach allowed them to demonstrate that natural vegetation adjacent to orchards may enhance the resilience of insect communities, potentially contributing to greater food security.

Co-author Associate Professor Paul Nevill highlighted the importance of this research, noting that insects pollinate 75% of all agricultural crops, yet many face extinction. In order to meet the food needs of the planet, diverse and healthy insect communities play a critical role in supporting essential ecosystem services such as pollination and biological control of pests.

The researchers collected over 2,000 insect specimens and identified more than 250 plant taxa from eDNA, including crops, weeds, and native Australian flora. Their findings have significant implications for global food security, particularly given the projected increase in population by 2050, requiring a 25-75% boost in agricultural productivity.

The team recommended incorporating standardized biodiversity surveys into regular farm monitoring, protecting agroecosystems by recognizing the value of natural vegetation, and revegetating uncultivated land within orchards. By preserving native habitats, we can safeguard not only our brunch menus but also global food security for generations to come.

Behavioral Science

“A Patchwork of Perspectives: Hong Kong Residents’ Views on Feral Buffalo in their Midst”

Feral water buffalo now roam Hong Kong s South Lantau marshes, and a 657-person survey shows they ignite nostalgia, wonder, and worry in equal measure. Many residents embrace them as living links to a fading rural past and potential conservation icons, yet others fear road blockages, safety hazards, and ecosystem impacts. Attitudes skew more positive among younger locals familiar with wildlife, while concern rises in groups with less rural exposure.

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As you venture deeper into this unique landscape, notice the diverse reactions from locals as they interact with their feral neighbors. Some are filled with wonder, while others express concern for safety or environmental impact. This image captures the essence of the complex relationships between humans and wildlife in a semi-urban setting, where natural beauty and urbanization coexist in an intricate dance.

The City University of Hong Kong-led study reveals that public attitudes toward the buffalo fall into four key categories: appreciation and conditional acceptance; concern about community impacts; seeing them as valuable for conservation and education; and individual perceptions formed through everyday encounters. Neutral responses were most frequent, followed by positive and then negative responses.

Regarding the questions on Buffalo Tolerance and Appreciation, 61% of the responses were neutral, 25% highly positive, and 14% highly negative, with effects of age, gender, ethnicity, and birthplace. Looking at the questions on Buffalo Social Benefits and Advocacy, 66% of responses were neutral, 19% highly positive, and 15% highly negative, with significant effects of age and ethnicity.

A similar pattern was found for questions on Preservation and Education, where 46% of the responses were neutral, 41% highly positive, and 13% highly negative, with effects of gender, ethnicity, and birthplace. In the final section on Impacts on Daily Life, 49% of the responses were neutral, 27% highly positive, and 23% highly negative, with significant effects of age and ethnicity.

The study also found that familiarity with wildlife in rural areas often leads to more positive perceptions among participants. This suggests that education and exposure can play a crucial role in shaping attitudes toward feral animals in semi-urban settings.

Ultimately, the research highlights the importance of considering diverse perspectives when managing human-wildlife interactions in shared landscapes. By understanding the complexities of these relationships, we can work towards creating harmonious coexistence between humans and wildlife, even in the most unexpected places.

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Air Quality

The Buzz on Bees: How Environmental Change Affects Their Communication and Pollination Abilities

High heat and heavy metals dampen a bumblebee’s trademark buzz, threatening pollen release and colony chatter. Tiny sensors captured up-to-400-hertz tremors that falter under environmental stress, raising alarms for ecosystems and sparking ideas for pollination robots.

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The buzz on bees has long been a topic of interest, but recent research is shedding new light on how environmental change affects their communication and pollination abilities. Scientists have found that high temperatures and exposure to heavy metals can reduce the frequency and pitch of non-flight wing vibrations in bees, which could have significant consequences for their role as pollinators.

Dr. Charlie Woodrow, a postdoctoral researcher at Uppsala University, has been studying the effect of environmental change on bee buzzes. He notes that people often don’t realize that bees use their flight muscles for functions other than flight, such as communication and defense. One important function is buzz-pollination, which involves a bee curling its body around the pollen-concealing anthers of flowers and contracting its flight muscles up to 400 times per second to produce vibrations that shake loose the pollen.

Dr. Woodrow’s experiments involved using accelerometers to measure the frequency of the buzz, which corresponds to the audible pitch. He also used thermal imaging to show how bees deal with the extra heat generated by their buzzing. The research has found that temperature plays a vital role in determining the properties of a bee’s buzz, and exposure to heavy metals can reduce the contraction frequencies of the flight muscles during non-flight buzzing.

The benefits of understanding the impact of environmental change on a bee’s buzz include unique insights into bee ecology and behavior, helping to identify species or regions most at risk, and improving AI-based species detection based on sound recordings. Dr. Woodrow suggests that buzzes could even be used as a marker of stress or environmental change.

The research also has implications for robotics and the future safeguarding of pollination services. Dr. Woodrow is working towards understanding bee vibrations through micro-robotics, so their results are also going towards developing micro-robots to understand pollen release.

Overall, the buzz on bees is more than just a curiosity; it’s an important aspect of their ecology that can provide valuable insights into environmental change and its impact on pollination services.

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Climate

Melting Glaciers Awaken Earth’s Most Dangerous Volcanoes

As glaciers melt around the world, long-dormant volcanoes may be waking up beneath the ice. New research reveals that massive ice sheets have suppressed eruptions for thousands of years, building up underground pressure. But as that icy weight disappears, it may trigger a wave of explosive eruptions—especially in places like Antarctica. This unexpected volcanic threat not only poses regional risks but could also accelerate climate change in a dangerous feedback loop. The Earth’s hidden fire may be closer to the surface than we thought.

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As glaciers around the world melt at an alarming rate due to climate change, scientists are warning that this may lead to a surge in volcanic eruptions. Research presented at the Goldschmidt Conference in Prague suggests that hundreds of dormant volcanoes could become more active as glacier retreat accelerates. The findings have significant implications for understanding and predicting volcanic activity, particularly in regions with extensive glacial coverage like Antarctica.

The study, led by researchers from the University of Wisconsin-Madison, USA, examined six volcanoes in the Chilean Andes, including the dormant Mocho-Choshuenco volcano. By precisely dating previous eruptions and analyzing crystals in erupted rocks, the team found that thick ice cover suppresses the volume of eruptions but allows a large reservoir of silica-rich magma to accumulate beneath the surface. As glaciers melt rapidly at the end of an ice age, this buildup of pressure triggers explosive volcanic eruptions.

Pablo Moreno-Yaeger from the University of Wisconsin-Madison emphasized that “glaciers tend to suppress the volume of eruptions from the volcanoes beneath them. But as glaciers retreat due to climate change, our findings suggest these volcanoes go on to erupt more frequently and more explosively.” This phenomenon is not limited to Iceland, where increased volcanicity has been observed, but could also occur in Antarctica and other continental regions.

While the volcanic response to glacial melting is almost instant in geological terms, the process of changes in the magma system is gradual and occurs over centuries. This gives some time for monitoring and early warning. However, increased volcanic activity could have global climate impacts. In the short term, eruptions release aerosol that can temporarily cool the planet. But with multiple eruptions, the effects reverse.

“Over time the cumulative effect of multiple eruptions can contribute to long-term global warming because of a buildup of greenhouse gases,” said Moreno-Yaeger. “This creates a positive feedback loop, where melting glaciers trigger eruptions, and the eruptions in turn could contribute to further warming and melting.”

The research was funded by the National Science Foundation as part of a grant led by Professor Brad Singer at UW-Madison, and is due to be published in a peer-reviewed journal later this year. The findings have significant implications for understanding and predicting volcanic activity in regions with extensive glacial coverage and could contribute to mitigating the effects of climate change on our planet.

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