Results 11 to 20 of about 3,466 (148)
野生动物学报, 2021 为了深入了解黑龙江穆棱东北红豆杉国家级自然保护区兽类组成及东北虎（Panthera tigris altaica）猎物资源现状，于2016—2018年在保护区内布设40个红外相机监测点和7个大样方调查兽类多样性和分析东北虎主要猎物资源。相机监测累计照相日12250个，共获得有效独立照片1139张，从中鉴定出野生兽类4目8科17种，其中国家一级重点保护动物有东北虎和东北豹（Panthera pardus orientalis）。样方调查记录到兽类足迹261条，足迹识别出兽类4目7科10种 ...
牛莹莹 张子栋 刘艳华 邱岩明 王道辉 周绍春
doaj +1 more source
星鸦（Nucifraga caryocatactes）对集中放置红松球果的分散贮藏与临时贮点管理
野生动物学报, 2020 星鸦（Nucifraga caryocatactes）对红松种子进行分散贮藏、重取、建立和更新临时贮点，这一过程的研究对丰富贮食行为理论很有意义。2017年10—11月，采用红外相机监测和样方调查的方法，分析凉水国家级自然保护区星鸦对集中堆放红松球果的贮食行为、临时贮点管理以及影响贮点生境选择的主要因素。结果表明：贮藏地星鸦的重取行为比例最高，为（55.42±1.34）%，移动行为占（25.74±6.24）%，贮藏行为占（11.08±2.69）%，且有争斗行为。星鸦贮点大小为（2.39±0.09）粒 ...
郑骄阳, 吕鸿达, 程鲲, 宗诚
doaj +1 more source
Se pu = Chinese journal of chromatography, 2022 建立了一种离子色谱-串联质谱(IC-MS/MS)测定白酒、黄酒、干红葡萄酒3种酒类样品中10种有机酸含量的方法。白酒样品氮吹后,经去离子水稀释,用IC-MS/MS分析检测;干红葡萄酒样品和黄酒样品,对比不同固相萃取小柱净化能力,最终选择石墨化炭黑固相萃取小柱进行净化,经去离子水稀释,用IC-MS/MS分析检测。选用高容量、强亲水性的Dionex IonPacTM AS11-HC型阴离子分析柱进行分离,以淋洗液自动发生器在线产生的KOH水溶液为淋洗液,进行梯度淋洗 ...
Yingqi Mu +4 more
semanticscholar +1 more source
基于阳离子型金属有机骨架混合基质膜的分散固相萃取-超高效液相色谱-串联质谱法测定水中7种苯氧羧酸类除草剂
Se pu = Chinese journal of chromatography, 2021 离子型金属有机骨架材料(iMOFs)对离子型化合物具有良好的选择吸附性,利用水热法合成了一种金属有机骨架材料MIL-101-NH2,以聚偏二氟乙烯(PVDF)为交联剂将其制备成混合基质膜(MMM),然后用三氟甲烷磺酸甲酯进行季胺基功能化改性,最终得到阳离子型金属有机骨架膜材料MIL-101-$NMe_{3}^{+}$-PVDF MMM,采用分散固相萃取方式富集水中的苯氧羧酸类除草剂,建立了一种基于阳离子型MOF混合基质膜的分散固相萃取-超高效液相色谱-串联质谱(UPLC-MS/MS ...
Xu Ji +4 more
semanticscholar +1 more source
Se pu = Chinese journal of chromatography, 2021 建立了同时测定化妆品中18种氯代烃类有机溶剂的气相色谱-质谱(GC-MS)检测方法。样品在饱和氯化钠溶液中由正十四烷振荡提取后,以Agilent J&W DB-624超高惰性毛细管柱(30 m×0.25 mm×1.4 μm)为分离色谱柱进行分析,以电子轰击(EI)源、SIM模式进行质谱监测,外标法定量。结果表明,18种化合物在19 min内完成色谱分离分析,检出限(LOD, S/N=3)和定量限(LOQ, S/N=10)分别为0.033~0.049 mg/L和0.10~0.15 mg/L ...
Juan Tang +6 more
semanticscholar +1 more source
Integrative Conservation, Volume 2, Issue 4, Page 201-213, December 2023., 2023 Livestock disturbances decreased the area of suitable habitat of forest pheasants by 14.28% in 7 years. Livestock activities remarkably increased the nest failure rate (by 2.18 times) of forest pheasants. Abstract The degradation and fragmentation of natural habitats, driven largely by anthropogenic activities such as grazing, represent growing ...
Xing Chen +7 more
wiley +1 more source
Use of road infrastructure for movement by common terrestrial vertebrates 常见陆生脊椎动物移动过程中对道路基础设施的利用
Wildlife Letters, Volume 1, Issue 3, Page 97-106, September 2023., 2023 In this study, we aimed to determine whether common terrestrial vertebrates used drainage culverts to cross roads, relative to rates of surface crossings. We expected that culvert characteristics (e.g., length, height, width, and openness ratio) and/or environmental characteristics (e.g., vegetation density) would influence road crossing behavior.
Felicity E. Charles +2 more
wiley +1 more source
Survey optimization for invasive Burmese pythons informed by camera traps 基于自动相机监测技术的入侵物种缅甸蟒的调查优化
Wildlife Letters, Volume 1, Issue 3, Page 143-148, September 2023., 2023 We evaluated the utility of camera traps to survey invasive Burmese pythons in the Florida Keys by deploying cameras pointed towards target areas of known radiotagged snakes under two trigger mechanisms—motion‐triggered or timelapse. We estimated detection probability and diel activity to optimize future surveys using timelapse camera traps and paired ...
Michael V. Cove +4 more
wiley +1 more source
A novel red‐edge spectral index for retrieving the leaf chlorophyll content
Methods in Ecology and Evolution, Volume 13, Issue 12, Page 2771-2787, December 2022., 2022 Abstract The leaf chlorophyll content (Chlleaf) is a crucial vegetation parameter in carbon cycle modelling and agricultural monitoring at local, regional and global scales. The red‐edge spectral region is sensitive to variations in Chlleaf. An increasing number of sensors are capable of sampling red‐edge bands, providing opportunities to estimate ...
Hu Zhang +15 more
wiley +1 more source
磁性三维氮掺杂碳纳米材料对6种双酚类化合物的吸附性能及其在泡腾分散微萃取中的应用
Se pu = Chinese journal of chromatography, 2022 采用简单高温煅烧法成功制备了磁性钴镍基氮掺杂三维碳纳米管与石墨烯复合材料(CoNi@NGC),将其作为吸附剂用于水体中6种双酚类化合物(BPs)的吸附性能和机理研究。将CoNi@NGC复合纳米材料用作萃取介质,运用酸碱泡腾片的CO2强力分散作用,开发了泡腾反应强化的分散固相微萃取前处理方法,结合高效液相色谱-荧光检测(HPLC-FLD)快速定量饮料中痕量BPs。采用扫描电镜、透射电镜、傅里叶红外光谱、氮气吸脱附、X射线光电子能谱和磁滞回线等技术手段对材料形貌结构进行表征,结果显示 ...
Tingting Liu +8 more
semanticscholar +1 more source