Core Viewpoint - The article highlights the conservation efforts and historical significance of the Puto Hornbeam (Carpinus putoensis), a unique tree species that is the last of its kind in the world, emphasizing the importance of human intervention in preventing its extinction [1][4][8]. Group 1: Historical Context - The first collection record of the Puto Hornbeam dates back to 1930, made by Mr. Zhong Guanguang in Zhejiang, China, with three specimens created [1]. - The specimens were initially stored at Zhejiang University and later transferred to various research institutions, indicating a rich history of botanical research in China [2]. - In 1932, Mr. Zheng Wanjun identified the species as a new one and named it Puto Hornbeam, marking a significant moment in botanical classification [3]. Group 2: Conservation Challenges - The Puto Hornbeam faces extinction due to both human activities, such as deforestation, and its own biological limitations, including low reproductive rates [4]. - The species is believed to have been introduced to China from Myanmar, and its limited geographic distribution has hindered its survival [4]. - The seed viability is critically low, with only about 2% of seeds being viable, and the germination rate of the original tree's seeds is only 50% [5]. Group 3: Conservation Efforts - Conservation measures include protecting the original tree through habitat management and monitoring, as well as attempts to expand its population through both asexual and sexual reproduction methods [6]. - The introduction of seeds and seedlings to various locations, such as Hangzhou and Shanghai, represents a strategy of ex-situ conservation to mitigate risks associated with its limited natural habitat [6][7]. - As a result of these efforts, the population of Puto Hornbeam has grown from a single tree to thousands across different provinces [6][8].

Core Viewpoint - The successful flowering of the critically endangered Guangxi Fire Paulownia in Nanning Tree Garden marks a significant achievement in conservation efforts for this rare species, highlighting its ecological importance and the need for ongoing protection [1][2] Group 1: Ecological Significance - Guangxi Fire Paulownia is a unique and critically endangered tree species endemic to China, characterized by its tall trunk and "flowers before leaves" growth habit, which offers high ornamental value [1] - Its extensive root system plays a crucial role in stabilizing poor limestone soils and maintaining regional ecological balance, making it an essential ecological guardian [1] Group 2: Conservation Status - The species has a very narrow natural distribution, primarily found in the limestone areas of central to southern Guangxi, with a sparse population and significant challenges in natural regeneration [1] - It is classified as critically endangered (CR) by the International Union for Conservation of Nature and is included in China's biodiversity red list, as well as being designated as a national key protected wild plant [1] Group 3: Research and Development - The flowering of Guangxi Fire Paulownia is part of a forestry research project funded by the Nanning Tree Garden, which began in 2020 and involved the collection and preservation of 35 germplasm samples [2] - The establishment of a 30-acre introduction and acclimatization trial forest aims to provide valuable samples for studying the species' adaptability to ex-situ conservation and for developing large-scale artificial propagation methods [2]

Core Points - The article highlights the ecological, scientific, and cultural significance of the rare species, the milu deer, in China, particularly in the Dongting Lake National Nature Reserve [2] - The Dongting Lake management has established a rescue center for injured or sick milu deer, equipped with professional medical facilities and staff to ensure timely assistance [2] - The management has also constructed flood refuge platforms to protect milu deer from frequent flooding during the rainy season [2] - In 2016, 16 milu deer were introduced from Jiangsu to enhance genetic diversity and adapt to environmental changes, contributing to the ecological balance in the region [3] - The population of milu deer in the reserve has increased to 323, showing significant growth since the initial protection efforts began [3]