Subjects: Other Disciplines >> Synthetic discipline submitted time 2023-03-28 Cooperative journals: 《中国科学院院刊》
Abstract: Chinese botanical gardens have a history of more than 100 years, but large-scale construction began in the 1950s with the establishment of modern botanical gardens led by Chinese Academy of Sciences (CAS). Currently there are 162 gardens in China, which have entered the stage of rapid construction and steady development. Chinese botanical gardens have made great contributions to native plant conservation, sustainable utilization, scientific research and environmental education in China, and have become the backbone and part of mainstream of international botanical garden community. To cope with negative effects of human disturbance on ecosystem, botanical gardens will play a more important social role; thus, the Chinese botanical gardens should adjust their developmental strategies to improve creational practices, national integrative development, to propose new initiatives in key areas and to develop national botanical garden system, so as to meet the conservation goals, sustainable developmental goals and support the green Belt and Road Initiative.
Subjects: Environmental Sciences, Resource Sciences >> Basic Disciplines of Environmental Science and Technology submitted time 2020-06-21 Cooperative journals: 《干旱区研究》
Abstract:生境片段化对植物种群具有复杂的遗传效应。在地理种群内部,新疆野苹果(Malus sieversii)呈现出多个片段化小群体。本研究选取遗传多样性较高的巩留种群作为研究对象,利用微卫星(SSR)标记采自5个小群体样点的101个植株样品基因型。通过分析不同小群体间的遗传多样性差异与遗传谱系关系,来探究生境片段化对新疆野苹果种群遗传结构的影响。结果表明:5个小群体间存在着遗传多样性差异,其中处于边缘位置的萨哈和小莫合尔2小群体保存了高水平的遗传多样性;由于地理隔离效应作用,这5个小群体可以划分为东西两个不同的遗传谱系。建议在将来开展的新疆野苹果种质资源保育和核心种质库构建过程中,应当注重这些边缘小群体和不同的遗传谱系。
Subjects: Biology >> Botany >> Plant ecology, plant geography submitted time 2016-05-27
Abstract:
Peer Review Status:Awaiting Review
Subjects: Biology >> Botany >> Plant ecology, plant geography submitted time 2016-05-03
Abstract: :Abstract The main distribution areas of tropical virgin forests in Jianfengling (JFL), Bawangling (BWL), Wuzhishan (WZS), Diaoluoshan (DLS), Yinggeling (YGL) of Hainan Island were selected, and the 100 cm deep soil samples were sampled and analyzed. SOC density in its areas were estimated by soil vertical fitting method and soil stratification method to discover its soil organic carbon distribution characteristic in tropical virgin forests of Hainan Island. Results showed that: (1) The average SOC densities using soil vertical fitting method in these regions were 14.98, 18.46, 16.48, 18.81, 16.66 kg?m–2, respectively,. The SOC densities using soil stratification method were 14.73, 16.24, 15.50, 16.91, 15.03 kg?m–2, respectively. The former was significantly higher than the latter (p < 0.05). Soil vertical fitting method was available used for calculating SOC density when soil was natural soil without disturbance. (2) The proportions of the first 0–30 cm interval related to the total content of the 1 m profile in these areas are 50.50%, 48.56%, 43.49%, 47.37% , 42.88%, respectively. (3) There was significantly negative correlation between SOC density and Shannon-Wiener index, Simpson index, species richness, soil bulk density; significantly positive correlation between SOC density and altitude, soil porosity, soil nitrogen. However, there was no significantly correlation between SOC density and slope, biomass, average diameter at breast height, average height. (4) Hainan the study area was located in the low latitudes, the rich rainfall and high temperature conditions which accelerated the decomposition of organic matter and nutrient recycling, which result in that SOC densities in tropical virgin forests of Hainan Island were significantly lower than that of SOC density in China.
Peer Review Status:Awaiting Review