Society
Ants at lower elevations influence bird diversity in mountain ecosystems
Here is a surprising factor influencing bird diversity at mid-elevations: the presence of ants from the Oecophylla genus.
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Mountains, which cover only 25% of the Earth’s surface, are home to a staggering 85% of the world’s amphibian, bird, and mammalian species, making them a crucial area for biodiversity and conservation efforts. While the relationship between species diversity and elevation has long been linked to environmental factors like climate, a new study from the Centre for Ecological Sciences (CES) at the Indian Institute of Science (IISc) uncovers a surprising factor influencing bird diversity at mid-elevations: the presence of ants from the Oecophylla genus.
“In mountains, you often see hump-shaped patterns of species diversity, and for a long time, people have been curious about the causes. One mechanism that hasn’t been thoroughly explored is biotic interactions, like competition,” said Kartik Shanker, Professor at CES and co-author of the study, which was published in Ecology Letters, in a press statement issued by IISc.
Oecophylla ants, which are aggressive insect predators, dominate the lower elevations of mountains in the paleotropics, a region covering Africa, Asia, and Oceania. The researchers investigated how these ants affect the diversity of insect-eating birds at various elevations.
Earlier research by co-author Trevor D. Price, Professor of Ecology and Evolution at the University of Chicago, had found that Oecophylla ants significantly reduced insect populations at the base of the eastern Himalayas, which likely influenced the presence of insect-eating birds. The current study aimed to determine if this pattern extended to other bird species across different mountain ranges.
Led by Umesh Srinivasan, Assistant Professor at CES, the researchers analyzed datasets that documented bird species at different elevations. They categorized the birds into dietary guilds, such as insectivores and omnivores, and compared mountain ranges that had Oecophylla ants at their base to those that did not.
“We looked at the ranges of these bird species at different elevations, starting from 100 meters and moving upwards in increments. Then, we compared bird species diversity between mountain ranges with and without Oecophylla ants,” explained Srinivasan, according to IISc statement.
The findings also raise concerns about how climate change could further disrupt these patterns
The results were striking. The researchers found that insect-eating birds, in particular, were most diverse at mid-elevations, peaking around 960 meters. This pattern suggested that the presence of Oecophylla ants at lower elevations forced the birds to move higher up the mountains to avoid competition for food. In contrast, bird groups such as nectar and fruit eaters, which did not compete with Oecophylla ants, showed declining species diversity as elevation increased.
The study highlights the critical role biotic interactions play in shaping species diversity in mountain ecosystems. The findings also raise concerns about how climate change could further disrupt these patterns. “With climate change, if the ants shift their ranges towards higher elevations, this might impact bird species at those elevations as well,” Srinivasan warned.
The research offers valuable insights into the complex dynamics that govern biodiversity in mountainous regions and underscores the importance of considering biotic factors, such as competition, in conservation planning.
Health
IITK Researchers Unveils Key Receptor Structure for Cancer and Respiratory Treatments
The team successfully visualized the atomic structure of CXCR2, a crucial human receptor involved in the progression of cancer and respiratory diseases
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Researchers from the Department of Biological Sciences and Bioengineering at the Indian Institute of Technology (IIT) Kanpur have made a path breaking discovery that could pave the way for new treatments for cancer and respiratory diseases. The team successfully visualized the atomic structure of CXCR2, a crucial human receptor involved in the progression of these diseases. Their findings, published in the prestigious journal Molecular Cell, offer a new perspective on targeting this receptor for therapeutic intervention.
CXCR2 is a key receptor in the immune system, involved in directing immune cells to infection and injury sites through interaction with chemokines—small signaling proteins. CXCR2’s role in inflammatory disorders and cancers such as chronic obstructive pulmonary disease (COPD), asthma, atherosclerosis, and pancreatic cancer makes it a promising target for new drugs.
Using advanced cryogenic-electron microscopy (cryo-EM), the IIT Kanpur researchers captured unprecedented details of the receptor’s “lock-and-key” mechanism, shedding light on how CXCR2 interacts with multiple chemokines. This discovery addresses a fundamental question in biomedical science about how a single receptor can bind to various chemokines and trigger biological responses. The visualization also opens up opportunities for designing novel therapeutics.
“Our findings provide a molecular blueprint for designing next-generation therapeutics that can precisely target CXCR2 and potentially reduce its role in cancer and respiratory diseases. By visualizing this receptor in its active state, we now have the opportunity to develop highly specific inhibitors that can disrupt its function, potentially leading to significant advancements in treatment strategies,” said Professor Arun Kumar Shukla, the lead investigator of the study at IIT Kanpur.
The research team at IIT Kanpur includes Shirsha Saha, Saloni Sharma, Manisankar Ganguly, Nashrah Zaidi, Divyanshu Tiwari, Nabarun Roy, Nilanjana Banerjee, and Ramanuj Banerjee. Their work also involved collaboration with experts from the University of Tokyo, Japan—Fumiya Sano, Hiroaki Akasaka, Takaaki Kobayashi, Yuzuru Itoh, Wataru Shihoya, and Osamu Nureki—along with Andy Chevigne from the Luxembourg Institute of Health.
This study was funded by the DBT Wellcome Trust India Alliance, Science and Engineering Research Board (SERB), Indian Council of Medical Research (ICMR), and LADY TATA Memorial Trust.
Building on this discovery, the IIT Kanpur team is now developing small molecules and antibodies aimed at targeting CXCR2. These therapeutics will undergo laboratory testing, followed by animal studies, bringing the team closer to offering innovative treatments for cancer and respiratory diseases. This achievement further underscores IIT Kanpur’s commitment to pioneering research that has the potential to revolutionize global healthcare and biomedical innovation.
Society
Is India’s Clean Cooking Gas Model the Future for the Global South?
The Indian model, backed by smart subsidies and sustainable policies, provides a scalable solution for developing nations striving for clean cooking access
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At the just concluded India Energy Week 2025 (February 11-14), India’s Union Minister of Petroleum and Natural Gas, Hardeep Singh Puri, chaired a Ministerial Roundtable on Clean Cooking, where India’s success in providing universal access to clean cooking gas became a key focal point. The Minister emphasized that India’s model for clean cooking gas is not only a success story but also a replicable blueprint for the Global South, offering solutions to nations facing similar energy access challenges.
“India’s clean cooking gas revolution is a game-changer,” said Puri. He pointed out the key factors behind this success: targeted subsidies, strong political will, the digitization of distribution networks by Oil Marketing Companies (OMCs), and nationwide campaigns to shift cultural practices towards clean cooking.
The session brought together representatives from Brazil, Tanzania, Malawi, Sudan, Nepal, and key industry leaders, including the International Energy Agency (IEA), Total Energy, and Boston Consulting Group (BCG). These nations, all striving to enhance energy access for their populations, were eager to learn from India’s achievements.
Under India’s popular government scheme Pradhan Mantri Ujjwala Yojana (PMUY– Prime Minister’s Lightening Scheme), beneficiaries receive LPG access at a highly affordable cost of just 7 cents per day, while other consumers can access clean cooking fuel at 15 cents per day. “This affordability has been a game-changer in driving widespread adoption,” added Shri Puri, underlining the pivotal role of subsidies in overcoming financial barriers to clean cooking.
International representatives shared their nations’ efforts to transition to clean cooking solutions. Dkt. Doto Mashaka Biteko, Deputy Prime Minister and Minister of Energy of Tanzania, outlined the country’s strategy to transition 80% of households to clean cooking by 2030, relying on subsidies and a mix of energy sources, including LPG, natural gas, and biogas. Despite this ambition, he noted challenges such as financing constraints, infrastructure costs, and the need for regulatory reforms to encourage private-sector participation.
Similarly, Dr. Mohieldien Naiem Mohamed Saied, Minister of Energy and Oil, Sudan, emphasized the need for private-sector involvement to overcome gaps in LPG supply, particularly as Sudan still imports much of its energy. He stressed the importance of encouraging local cylinder production and ensuring cost-effective imports to drive broader adoption.
Mary Burce Warlick, Deputy Executive Director of the IEA, recognized India’s success as a model that offers valuable lessons for other nations grappling with issues of affordability, access, and infrastructure. She emphasized the role of concessional financing and public-private partnerships (PPP) in scaling up clean cooking access. Addressing cultural acceptance and regulatory adjustments, such as tax reductions, were also highlighted as critical factors for large-scale adoption.
Rahool Panandiker, Partner at Boston Consulting Group (BCG), further underscored the effectiveness of India’s clean cooking transformation. He attributed the success to the strong political commitment, effective subsidy targeting, and robust public awareness campaigns. Panandiker also credited India’s Oil Marketing Companies (OMCs) for enabling last-mile LPG delivery through digital platforms, making adoption seamless. He also stressed the importance of refining the cylinder refill model to ensure sustained usage while balancing affordability with economic sustainability.
In addition to LPG, the roundtable explored the potential of alternative clean cooking technologies. Puri addressed the potential of solar cookers in expanding clean cooking solutions across the Global South. He highlighted that IOCL’s advanced solar cookers, priced at approximately $500 per unit, could be a viable solution, though the price point remains a challenge for widespread adoption. “Leveraging carbon financing and collaborating with the private sector can drive costs down and make solar cooking a viable alternative for millions,” he stated.
This initiative aligns with India’s broader efforts to diversify clean cooking options beyond LPG, further reinforcing its commitment to reducing reliance on traditional biomass fuels and cutting carbon emissions. The government’s focus on solar cooking options aims to ensure a more sustainable future for energy access, particularly in remote and underserved areas.
“The Indian model, backed by smart subsidies and sustainable policies, provides a scalable solution for developing nations striving for clean cooking access,” Puri said. He also stressed that achieving universal clean cooking access is not merely an economic imperative but a moral one, given the severe health and environmental impacts of traditional biomass cooking.
Green Energy
India Strengthens Clean Energy Initiatives at India Energy Week 2025
These clean energy projects are part of India’s broader strategy to diversify its energy sources and strengthen its energy security while promoting sustainability
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At the India Energy Week 2025, India underscored its commitment to a sustainable and clean energy future through several strategic partnerships and agreements. Minister of Petroleum and Natural Gas, Hardeep Singh Puri, highlighted the importance of these initiatives in driving India’s transition to a greener energy landscape.
A key development in the clean energy sector was the partnership between India’s public sector firm BPCL and Eco Wave Power of Israel, which aims to establish India’s first wave energy pilot project in Mumbai. The project will utilize wave energy converter technology, marking a significant step in the country’s exploration of renewable energy sources.
In the biofuel sector, BPCL also signed an MoU with the National Sugar Institute, Kanpur, to scale up the production of sweet sorghum-based bioethanol. This collaboration will help build capacity for both farmers and industry partners, supporting India’s drive to increase the share of biofuels in its energy mix.
These clean energy projects are part of India’s broader strategy to diversify its energy sources and strengthen its energy security while promoting sustainability. Through these initiatives, India is reinforcing its position as a key player in the global clean energy transition.
Minister Puri emphasized that these agreements are a testament to India’s commitment to securing affordable, sustainable energy and fostering international collaborations in cutting-edge energy solutions. These partnerships will help achieve India’s energy transition goals, ensuring a resilient and sustainable energy future for the nation.
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