Results 91 to 100 of about 143,222 (253)

Calibration of the species threat abatement and restoration metric's threat abatement component in a Costa Rican landscape

open access: yesConservation Biology, EarlyView.
Abstract Achieving global conservation policy goals requires the ability to set and measure progress toward science‐based targets for biodiversity. The species threat abatement and restoration (STAR) metric was developed to enable actors to set science‐based targets for species.
Louise Mair   +17 more
wiley   +1 more source

Differentiation in leaf and branch traits of angiosperms and their relationships between species abundance in the Thousand Island Lake Region(千岛湖被子植物枝叶性状分化及其与种多度的关系)

open access: yesZhejiang Daxue xuebao. Lixue ban, 2017
种间生态位分化是物种共存的重要原因,了解种间生态位分化特征对于推测物种多样性维持机制具有重要意义.植物的种间功能性状分化在一定程度上能够反映其生态位分化,进而导致植物在群落内的适合度差异.据此,本研究针对千岛湖地区75种常见木本被子植物,分析了8个与水分输导、资源获取和利用策略相关的功能性状分化,及其与物种多度的关系.主成分分析表明,种间功能性状的分化主要发生在比叶面积、叶绿素含量以及叶气孔密度上.8个性状中有5个,即叶绿素含量、叶片厚度、叶面积、比叶面积和最大树高具有一定程度的系统发育保守性 ...
YUJingjing(余晶晶)   +7 more
doaj   +1 more source

ソウサ デンシ ケンビキョウ ニヨル ラクヨウカジュ ハナメ ノ ケイタイ チョウサ : カキ リンゴ セイヨウナシ オウトウ ニツイテ [PDF]

open access: yes, 1985
【緒言】果樹の花芽の分化・発達に関する既往の報告は多く,分化期に関する調査,樹体の生理条件との関係,環境条件との関係など,花芽形成・発達に関する研究は多方面にわたって行われている.しかしこれらの中の花芽や花器の形態に関する観察は,ほとんどが光学顕微鏡(LMS)を用いて行われたものであり,走査電顕(SEM)による花芽の観察例は,まだそれ程多くはない.とくにわが国では,最近になって,傍島らによるSEMを用いたカキ花芽の詳細な観察結果の報告がなされたものの,その他は,ミカン ...
渡部 俊三
core   +1 more source

Harnessing social media data to track species range shifts

open access: yesConservation Biology, EarlyView.
Abstract Biodiversity monitoring programs and citizen science data remain heavily biased toward the Global North. Especially in megadiverse countries with limited biodiversity records, incorporating social media data can help address existing data gaps.
Shawan Chowdhury   +15 more
wiley   +1 more source

大豆根分泌物活化难溶性铝磷的研究

open access: yesShuitu Baochi Xuebao, 2005
在酸性红壤上,土壤有效磷含量低,大部分磷以难溶性磷形式存在,这是影响作物生产的重要限制因素之一。作物根分泌物活化难溶性磷的能力对改善其磷素营养具有重要意义。本文系统研究了大豆根分泌物对难溶性铝磷的活化效果,同时运用阴、阳离子交换树脂将根分泌物分成阴离子组分、中性组分和阳离子组分,活化结果表明.阴离子组分对铝磷的活化量显著高于中性组分和阳离子组分。运用分子膜把根分泌物分成大于8K、8~3.5K、3.5~1K和小于1K组分.发现对铝磷活化量最大的组分为小于1K根分泌物组分。另外 ...
沈宏 菊井森士 严小龙 松本英明
doaj  

シロアリにおける生殖カーストの分化と特異的な形態形成に関する分子発生学的研究 [PDF]

open access: yes, 2015
富山大学・富理工博甲第86号・齊木亮太・2015/03/24・★論文非公開 ...
齊木 亮太
core   +1 more source

Biodiversity‐driven spatial conservation planning to delineate temporally stable regions

open access: yesConservation Biology, EarlyView.
Abstract The accelerating loss of biodiversity underscores the critical need for effective conservation strategies, particularly in the face of climate change and anthropogenic pressures. We devised a conservation planning framework that adopts a temporal stacking approach to species distribution models and landscape connectivity analyses. These models
Mattia Iannella   +5 more
wiley   +1 more source

ANGPTL4基因在3T3-L1前脂肪细胞诱导分化过程中表达水平的变化

open access: yesZhongguo shiyan zhenduanxue, 2009
目的观察血管生成素样蛋白-4(Angiopoietin-like protein 4,ANGPTL4)基因在3T3-L1前脂肪细胞诱导分化过程中表达水平的变化,探讨ANGPTL4基因与脂肪细胞分化的关系。方法体外培养3T3-L1前脂肪细胞,在3T3-L1前脂肪细胞分化成熟过程中(0-10 d),采用油红O染色,观察脂肪细胞分化及脂质积聚情况;采用Real-time PCR、逆转录PCR技术检测脂肪细胞分化标志基因(LEPTIN,ADIPONECTIN)和ANGPTL4 mRNA表达;采用Western ...
黄颖, 曹岩, 刘阳, 郑永晨
doaj  

骨粗鬆症治療における活性型ビタミンD3の生理作用の研究 [PDF]

open access: yes, 2014
筑波大学 (University of Tsukuba ...
坂井 貞興
core  

Defining and identifying relevant stakeholders to advance effective conservation

open access: yesConservation Biology, EarlyView.
The challenge of defining stakeholders in environmental science and an approach for refining existing definitions. Abstract Stakeholder is a contested term that has spawned a multitude of ad hoc definitions. The ambiguity of these definitions has oftentimes impeded transdisciplinary research in environmental governance and conservation science because ...
Milan Büscher   +5 more
wiley   +1 more source

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