Results 41 to 50 of about 8,168 (162)
Read the free Plain Language Summary for this article on the Journal blog. Abstract Organic phosphorus mineralization is a critical process in the phosphorus cycle, governing phosphorus bioavailability for plants. The PhoD gene, which encodes the key enzyme alkaline phosphatase, serves as a valuable biomarker for this process.
Sandhya Mishra +3 more
wiley +1 more source
用数量分析的方法研究了关帝山庞泉沟主要森林群落华北落叶松林和云杉林及其交错区的植物多样性.结果表明,随海拔高度的变化,群落的植物多样性指数呈降低趋势;Pielou均匀度指数乔木层呈降低趋势,而灌木层和草本层的变化不太明显.群落交错区的植物多样性明显增加.不同的生长型其多样性的变化表现出不同的特征.群落的β多样性表现出比较复杂的变化趋势.随海拔高度的变化其基本可以分为3个区段,在每个区段表现出的不同特征显示了群落及其交错区物种多样性的变化特征.
李毳
doaj
Abstract The Natura 2000 (N2K) network of protected areas is one of the main tools for area‐based conservation in the European Union (EU), yet its role in preserving plant biodiversity requires better understanding. We examined data kept in the European Vegetation Archive from over 1.2 million vegetation plots and obtained over 14.2 million plant ...
Michele Di Musciano +41 more
wiley +1 more source
Characteristics of the aboveground biomass and diversity along altitudinal gradients in alpine meadows of the upper reaches of the Yarlung Zangbo River [PDF]
[Objective] The Yarlung Zangbo River is the most important river in the Tibetan Plateau, and the study of aboveground biomass and species diversity of the Yarlung Zangbo River is of great significance for the understanding of grassland resources and ...
DONG Ruizhen +5 more
core +1 more source
Abstract Illegal wildlife trade (IWT) is one of the largest global illegal activities, and it negatively affects biodiversity and sustainable development worldwide. DNA barcoding coupled with high‐throughput sequencing (i.e., metabarcoding) is useful in identifying taxa affected by IWT and has been used routinely for decades.
Maria Joana Ferreira da Silva +9 more
wiley +1 more source
为了探讨样方法在木本植物区系研究中的应用前景,通过设置固定样地进行实地调查,收集到了浙江省11个自然保护区样地内木本植物名录,应用Czechanowski系数对11个自然保护区的科、属相似性系数进行分析.结果表明:11个自然保护区的66个30 m×30 m的样方内,共计木本植物435种,隶属于169属70科;科、属的亚热带性质显著,其热带与温带类型占比分别为57.89%,41.07%和40.72%,53.89%,从属级区系成分看,样地内木本植物区系来源于多种地理成分,有13个大的分布类型 ...
TIANLei(田磊) +7 more
doaj +1 more source
Comparative study on community ecology of transition zone along Eucalyptus citriodora to Acacia confusa forest stands [PDF]
近年来,外来树种桉树在我国大量种植,产生了巨大的经济效益,但同时,其速生性、较强的化感作用等特性,也带来一些负面的环境问题,评估桉树种植的环境生态影响成为当前林业生态研究的热点。目前大量的研究集中在桉树群落生态学上,而关于桉树与乡土树种过渡带的群落生态学的综合比较研究未见报道。 为此,本文针对无居民海岛柠檬桉(Eucalyptuscitriodora)林与台湾相思(Acaciaconfusa)林过渡带三种林分林下层植被群落生态、林分凋落物及其分解动态进行了研究 ...
李学梅
core
Species composition and seasonal variation of netz-phytoplankton in the eastern marginal China seas [PDF]
为揭示中国东部陆架边缘海浮游植物群落季节变化规律,根据2006年6–7月、2007年1–2月、2007年11月和2009年4–5月在中国东部陆架边缘海域(25.00°–39.00°n,118.00°–129.00°E)进行的综合采样调查,对调查海域网采浮游植物(网孔直径77μM)的物种多样性和分布特征进行了研究。4个航次共鉴定出浮游植物4门70属257种(不包括未定名种),其中硅藻是主要功能群,其次是甲藻,主要的优势种为骨条藻(SkElETOnEMA SPP.)、细弱海链藻(THAlASSIOSIrA ...
周茜茜 +3 more
core +1 more source
In vitro culture, cryopreservation, and field reintroduction of the endangered Mingan thistle
Abstract Current plant conservation efforts are hindered by, for example, poor seed germination, low viability, and insufficient propagation and preservation technologies. To address these problems, we devised an approach to plant conservation that integrates conservation, preservation, and restoration (CPR), which uses advanced in vitro techniques. We
Mukund R. Shukla +4 more
wiley +1 more source
原生植被优势种及生物多样性的空间分布特征对于青藏铁路沿线植被恢复和重建具有重要的理论指导意义。在对青藏铁路沿线1142 km设置27个样带、248个样地、2242个样方进行系统调查的基础上,系统研究了青藏铁路沿线植物群落优势种组成及生物多样性空间分布规律。在铁路沿线样方中共出现种子植物305个种与变种,22个灌木种,283个草本种和亚种,分别隶属于40科、134属;优势种种类相对较少,共40种,灌木4种;物种丰富度(S)沿铁路呈南多北少趋势,在高平原地段丰富度相对较高,且随海拔的升降而升降 ...
周金星 +3 more
doaj

