With advances in transportation, information exchange, and technologies such as next–generation sequencing, a new era has dawned for investigating biodiversity and conservation in the Himalayan region. In this issue, we have gathered together leading researchers to deepen our understanding of the mechanisms and evolutionary processes shaping Himalayan biodiversity, as well as the implications of these for conservation. By considering the Himalayas within a broader geographic context, we seek to highlight their role in contributing to biodiversity both within the region and beyond. This is the second special issue devoted to this topic. Readers may also be interested in the first special issue published last year; further details can be found at the following link: https: //www. jse. ac. cn/EN/volumn/volumn₁2750. shtml. The Himalayan region is celebrated not only for its awe–inspiring landscapes—towering peaks, vast glaciers, and verdant valleys—but also as one of Earth′s most vital biodiversity hotspots (CEPF, https: //www. cepf. net/our-work/biodiversity-hotspots). Stretching across five nations (India, Nepal, Bhutan, China, and Pakistan), the Himalayas harbor an astonishing variety of plants, birds, and mammals. Iconic species such as the snow leopard and red panda evoke both wonder and a sense of conservation urgency (The Conversation, https: //theconversation. com/). Because a significant proportion of this biodiversity is endemic, the Himalayas play a central role in maintaining global ecological balance (Climate Refugees, https: //www. climate-refugees. org/). This extraordinary ecological diversity is underpinned by a mosaic of habitats—ranging from subtropical forests to alpine meadows—created by dramatic altitudinal gradients (Price et al. , 2014). Beyond sustaining life, the Himalayas function as a massive carbon sink, regulate regional climates, and maintain the hydrological cycles essential to vast swathes of Asia (Kattel, 2022). Despite their global significance, Himalayan ecosystems face unprecedented threats from habitat degradation, climate change, and foreign species invasions (Wang et al. , 2022). Notably, the fate of Himalayan biodiversity is intricately linked to the region′s diverse indigenous cultures, which have cultivated rich traditions of stewardship, medicinal knowledge, and spiritual reverence for the land (UNESCO, https: //ich. unesco. org/en/convention). Therefore, preserving these ecosystems is not only an ecological imperative but also an essential act of protecting shared cultural heritage and traditional wisdom. In this era of rapid change, research and conservation efforts must integrate both ecological and sociocultural dimensions to ensure that this vital region continues to provide resilience for generations to come. This connection underscores the critical importance of biodiversity and conservation research in the Himalayas. Few geodynamic phenomena capture the imagination as vividly as the rise of the Himalayas. Straddling the frontiers of five nations, the range stands as a formidable natural barrier and a living laboratory of Earth′s geological processes. The prevailing theory of its formation centers on the collision of the Indian and Eurasian plates—an event that took place around 50 million years ago (Boone et al. , 2025). Yet, modern research paints a more complex picture, suggesting the origins of the Himalayas extend to pre–collisional tectonic episodes and earlier crustal movements (Ibarra et al. , 2023; Yang et al. , 2025). Intense scientific debate continues over the exact timing and rates of uplift, the role of erosional forces, and the interplay between tectonic and climatic influences (Whipple et al. , 2023; Li et al. , 2025; Liu for instance, Late Miocene river captures in the Eastern Himalaya drove genetic differentiation in Schizothorax fish (Sui et al. , 2026), while Pleistocene climatic fluctuations and tectonic cycles shaped the evolution of cave loaches (Luo et al. , 2026) and desert fishes (Feng et al. , 2026). These environmental constraints also produced parallel genomic divergence patterns in avian groups, such as the Willow Tit and Marsh Tit, across China (Wu et al. , 2026). The application of modern phylogenomics has resolved long–standing taxonomic uncertainties in the Inula complex (Liu et al. , 2026) and the endemic bamboo genus Thamnocalamus (Chen et al. , 2026). Finally, the collection addresses urgent conservation needs, identifying high genetic load and anthropogenic bottlenecks in Asia′s tallest tree, Cupressus austrotibetica (Yang et al. , 2026), and utilizing environmental DNA to understand how hydroclimatic gradients influence multi–trophic community assembly across the Qinghai–Xizang Plateau (Lu et al. , 2026). Research focused on aquatic holometabolan insects with broader distributions also offers insights into historical distribution patterns, considering eastern Asia as a cohesive subject and examining how significant geographic features in western China, such as the Qinling–Daba Mountains (adjacent to the Himalayas), have impacted their evolution (Zou et al. , 2026). In conclusion, the Himalayas stand as a testament to the intricate interplay between geology, biology, and culture, highlighting the urgent need for a holistic understanding of their ecosystems. As we advance into the genomic era, leveraging cutting–edge technologies and collaborative research will be pivotal in unraveling the evolutionary narratives nestled within this majestic mountain range. By recognizing and addressing the interconnected challenges facing Himalayan biodiversity, we can develop targeted conservation strategies that not only protect unique species but also preserve the invaluable cultural heritage of the region. Ultimately, fostering a sustainable coexistence between human communities and the natural world in the Himalayas will be essential for ensuring the resilience of this global ecological treasure in the face of an uncertain future. We are grateful to Hong–Zhi Kong, Zhi–Duan Chen, Song Ge, Melvyn Herbert, and Jing–Jing Tan for their invaluable suggestions and support on this special issue. This work was supported by the National Natural Science Foundation of China (NSFC Grant No. 32171605).
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