搜索结果: 1-15 共查到“知识库 农学 Nature”相关记录29条 . 查询时间(0.125 秒)
Biodiversity Conservation of National Parks and Nature-Protected Areas in West Africa: The Case of Kainji National Park, Nigeria
carbon storage and sequestration climate change habitat diversity Kainji National Park protected areas air quality
2023/11/20
Due to rising global warming and climate change, biodiversity protection has become a critical ecological concern. Rich biodiversity zones are under threat and are deteriorating, necessitating nationa...
农业干旱是指由于降水不足和蒸发过度而导致的土壤水分亏损，在生长季会影响作物生产和生态系统功能。2021年春末夏初，中亚大部分地区遭受了严重的农业干旱，对农业和畜牧业造成了严重影响，这引发了人们对农业干旱的成因及其未来可能变化问题的高度关注。2021年的中亚极端农业干旱并非一次偶然事件，在过去30年中，受当地温度持续升高和降水减少的影响，中亚土壤湿度在生长季初期显著降低，农业干旱加剧，令该地区面临严...
浙江大学生命科学研究院2021年10月12日方东实验室在Nature Communications杂志阐明了H3K27me3作为关键调控因素在Wnt3a诱导的细胞不对称分裂过程中起到重要作用（图）
细胞分裂 小鼠胚胎
2022/10/25
Wnt信号通路在干细胞的生长发育、干性维持、肿瘤发生和转移等过程中都起到非常重要作用。但由于Wnt信号通路调控依赖于WNT配体的浓度梯度，导致其体内研究尤其困难。研究表明，WNT3a蛋白偶联的磁珠可以在空间上产生Wnt信号的梯度分布，并且能够诱导小鼠胚胎干细胞产生不对称细胞分裂。当细胞与磁珠接触并且分裂之后，靠近磁珠的子细胞会维持干细胞干性，而远离磁珠的子细胞发生细胞分化1。在此过程中，亲本和新合...
Application of a model for the evaluation of the “Visitor Satisfaction” in a nature reserve of South Italy
protected areas recreational services local development assessment preferences Sicily
2017/6/26
The protected natural area represents an important resource because from it sustainable and long-lasting social and economic development processes can start. In fact, the conservation of biodiversity ...
How close to nature is close-to-nature pine silviculture?
stand structure Scots pine natural pinewoods
2016/1/29
Structural parameters of Scots pine stands (129?91 years) on their natural sites (270?00 m a.s.l.) are described on 6 permanent research plots (PRP; 3 in managed stands using near-natural silvicultura...
Modelling forest dynamics in a nature reserve: a case study from south-central Sweden
pine spruce computer simulation ecological model
2015/4/14
This paper presents a modelling study on the forest dynamics in Helgedomen Nature Reserve (HNR) in Sweden. The main components of the forest transitions that occurred between 1930 and 2010 were descri...
Financial and socio-economic impacts of nature conservation on forestry in Slovakia
nature conservation financial and socio-economic impacts NATURA 2000
2015/4/14
The article deals with financial and socio-economic impacts of nature conservation in forest and wood industries of Slovakia. The paper presents costs and losses of state budget, forest enterprises an...
Coppice-with-standards in floodplain forests ?a new subject for nature protection
floodplain forest forest management storeyed high forest
2015/3/16
At present, the coppice-with-standards system has become so rare in floodplain forests that it is considered a natural monument. In 1990, the coppice-with-standards system was not recorded in the terr...
Dynamics of tree species composition and characteristics of available space utilization in the natural forest of the National Nature Reserve Hrončokovsky Grúň
natural forest developmental stage utilization of production space structure
2015/3/12
The paper deals with changes in the diameter structure of particular tree species as well as with the selected production characteristics in the mixed virgin forest Hrončokovsky Grúň. The object ...
Historical development of floodplain forests in the Upper Moravian Vale (Vrapač National Nature Reserve, Czech Republic)
floodplain forest historical development of forests coppice-with-standards national nature reserve forest management
2015/3/12
The paper deals with historical development of floodplain forests in the area of Vrapač National Nature Reserve in the floodplain of the Morava River (Protected Landscape Area Litovelské Pomoraví...
Effects of game on the condition and development of natural regeneration in the Vrapač National Nature Reserve (Litovelské Pomoraví)
natural regeneration Capreolus capreolus Dama dama
2015/3/3
In 2001–2005, the effects of game on the condition and development of natural regeneration of a floodplain
forest were studied in three permanent transects in the Vrapač National Nature Reserve...
Population dynamics of eight-toothed spruce bark beetle (Ips typographus[L.]) in the area of National Nature Reserve Praděd in 1998–2001
Ips typographus population dynamics management of Ips typographus NNR Praděd regulated disintegration
2015/2/6
The paper deals with the study of bionomics and population dynamics of Ips typographus (L.) in the area of the Praděd National Nature Reserve (NNR). Data were collected on the basis of detected feedin...
Dead wood and mycoflora in Nature Reserve Polom, Protected Landscape Area Železné hory
dead wood wood decomposition mycoflora wood-decaying fungi
2015/2/2
Activity of fungi participating in the dead wood decomposition was studied in the Velky Polom Nature Reserve, Protected Landscape Area Železné hory. Two game-proof fences of an area of 0.30 ha (5...
Inventory of dead wood in the Kněhyně-Čertův mlyn National Nature Reserve, the Moravian-Silesian Beskids
dead wood inventory Field Map system the Moravian-Silesian Beskids the Kněhyně-Č ertů v mlyn National Nature Reserve
2015/2/2
In four permanent experimental plots, dead wood was inventory under conditions of mountain forest ecosystems of the Kněhyně-Čertův mlyn National Nature Reserve, the Moravian-Silesian Beskids...
Influence of forest stand structure on the occurrence of bird community in Skalná Alpa National Nature Reserve in the Veľká Fatra Mts. (West Carpathians)
primeval forest texture diameter structure dead wood bird community
2015/2/2
The study deals with the influence of the structure, texture and dynamics of a spruce-beech primeval forest on the bird community in Skalná Alpa National Nature Reserve in the Veľká Fatra Mts. (W...