检索结果-南通市图书馆

Analysis of forest structural complexity using airborne LiDAR data and aerial photography in a mixed conifer–broadleaf forest in northern Japan

引用

Journal of Forestry Research 2018年第2期29卷 473-487页

作者： Sadeepa Jayathunga toshiaki owari Satoshi Tsuyuki Department of Global Agricultural Sciences Graduate School of Agricultural and Life SciencesThe University of Tokyo The University of Tokyo Hokkaido Forest Graduate School of Agricultural and Life SciencesThe University of Tokyo

Determining forest structural complexity,i.e.,a measure of the number of different attributes of a forest and the relative abundance of each attribute,is important for forest management and *** this study,we examined the structural complexity of mixed conifer–broadleaf forests by integrating multiple forest structural attributes derived from airborne Li DAR data and aerial *** sampled 76 plots from an unmanaged mixed conifer–broadleaf forest reserve in northern ***-level metrics were computed for all plots using both field and remote sensing data to assess their ability to capture the vertical and horizontal variations of forest structure.A multivariate set of forest structural attributes that included three Li DAR metrics(95 th percentile canopy height,canopy density and surface area ratio) and one image metric(proportion of broadleaf cover),was used to classify forest structure into structural complexity *** results revealed significant correlation between field and remote sensing metrics,indicating that these two sets of measurements captured similar patterns of structure in mixed conifer–broadleaf ***,cluster analysis identified six forest structural complexity classes includingtwo low-complexity classes and four high-complexity classes that were distributed in different elevation *** this study,we could reliably analyze the structural complexity of mixed conifer–broadleaf forests using a simple and easy to calculate set of forest structural attributes derived from airborne Li DAR data and high-resolution aerial *** study provides a good example of the use of airborne Li DAR data sets for wider purposes in forest ecology as well as in forest management.

关键词： Airborne laser scanning High resolution imagery Hokkaido Forest structure Pan-mixed forests

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Effects of silviculture treatments in a hurricane-damaged forest on carbon storage and emissions in central Hokkaido, Japan

引用

Journal of Forestry Research 2011年第1期22卷 13-20页

作者： toshiaki owari Naoto Kamata Takeshi Tange Mikio Kaji Akio Shimomura Hokkaido Forest Graduate School of Agricultural and Life Sciences The University of Tokyo 2 jo Kita 1 Yamabe Furano Hokkaido 079-1561 Japan Chichibu Forest Graduate School of Agricultural and Life Sciences The University of Tokyo 1-1-49 Hinoda Chichibu Saitama 368-0034 Japan Department of Forest Science Graduate School of Agricultural and Life Sciences The University of Tokyo 1-1-1 Yayoi Bunkyo Tokyo 113-8657 Japan

Hurricanes cause abrupt carbon reduction in forests, but silviculture treatment can be an effective means of quickly regenerating and restoring hurricane-damaged sites. This study assessed how silviculture treatments affect carbon balance after hurricane damage in central Hokkaido, Japan. We examined carbon storage in trees and underground vegetation as well as carbon emissions from silviculture operations in 25-year-old stands, where scarification and plantation occurred just after hurricane damage. The amount of carbon stored varied according to silviculture treatment. Among three scarification treatments, a scarified depth of 0 cm （understory vegetation removal） led to the largest amount of carbon stored （64.7 t·ha^-1 C）. Among four plantation treatments, the largest amount of carbon was stored in a Larix hybrid （L. gmelinii var. japonica × L. kaempferi） plantation （80.3 t·ha^-1 C）. The plantation of Abies sachalinensis was not successful at accumulating carbon （40.5·ha^-1 C）. The amount of carbon emitted from silviculture operations was 0.05-0.14 t·ha^-1 C, and it marginally affected the net carbon balance of the silviculture project. Results indicate that silviculture treatments should beperformed in an appropriate way to effectively recover the ability of carbon sequestration in hurricane-damaged forests.

关键词： carbon emission carbon storage forest restoration hurricane damage plantation scarification

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

饥饿后再投喂对黑鲷幼鱼补偿生长影响研究

饥饿后再投喂对黑鲷幼鱼补偿生长影响研究

引用

作者： Bergo owari NGANDZALI 浙江大学

学位级别：硕士

Effects of single phase of food deprivation and refeeding on metabolic parameters were studies in juvenile black seam bream, weighing 15.79±0.21 g. Fish were divided into four different starvation periods:5,10,15 and 20 days designated as D5,D10, D15, and *** starvation periods fish were fed to satiation twice a day until the end of the experiment. The duration of refeeding periods was 51 days for D5,46 days for D10, 41 days for D15 and 36 days for D20, which was dictated by the length of the fasting period. The control group (DO) was continually fed to satiation throughout the experiment. The experiment lasted 8 weeks. Fish in all the experimental groups were fed the same diet (40.89% crude protein and 14.27% crude fat). Each group was assigned to triplicate groups of 25 fish per tank in a completely randomized design. Fish were maintained in fiberglass tanks (600 L) and supplied with flowing seawater (3L min-1);temperature and salinity were 28±1℃and 29 g L-1, respectively. Dissolved oxygen concentrations were not below than 5.0 mg L'1 at any point. Fish were fed twice daily (0800 h and 1600h).Significant decrease in body weight was recorded as early as on day 10 of starvation. On day 20 this decrease was more pronounced, reaching lower value in comparison to the days,5-15 (P0.04). Survival was significantly affected by the length of starvation periods. Fish that starved for 20 days showed a lower survival rate than fish in control group, D5 and D10 (P0.05).A concomitant decrease in the whole body and muscle lipid content was also observed during this period, with a progressive decrease from day 10 to day 20 of starvation in

关键词： Starvation Refeeding Juvenile black sea bream Acanthopagrus schlegelii Compensatory growth Enzymes activities Gastrointestinal tract Histological structure

来源：

同方学位论文库评论

在线全文

同方学位论文库

学校读者我要写书评

暂无评论

三种常用药物对黑鲷幼鱼的急性毒性试验

引用

饲料工业 2010年第16期31卷 45-46页

作者： owari Ngandeali Bergo 马晶晶王鸣邵庆均浙江大学浙江杭州310029 山东省海洋水产研究所上海桑普生化有限公司

试验研究水产常用药物敌百虫、硫酸铜+硫酸亚铁合剂、高锰酸钾对黑鲷幼鱼的急性毒性。结果发现,黑鲷幼鱼对敌百虫24、48、96h的半数致死浓度分别为1.13、0.85、0.54mg/l,敌百虫对黑鲷幼鱼的安全浓度为0.14mg/l;黑鲷幼鱼对硫酸铜+硫酸亚... 详细信息

试验研究水产常用药物敌百虫、硫酸铜+硫酸亚铁合剂、高锰酸钾对黑鲷幼鱼的急性毒性。结果发现,黑鲷幼鱼对敌百虫24、48、96h的半数致死浓度分别为1.13、0.85、0.54mg/l,敌百虫对黑鲷幼鱼的安全浓度为0.14mg/l;黑鲷幼鱼对硫酸铜+硫酸亚铁合剂(5:2)24、48、96h的半数致死浓度分别为7.07、6.43、6.25mg/l,硫酸铜+硫酸亚铁合剂对黑鲷幼鱼的安全浓度为1.60mg/l;1mg/l和2mg/l的高锰酸钾在30min内对黑鲷幼鱼的行为等无明显影响。

关键词：黑鲷幼鱼敌百虫硫酸铜+硫酸亚铁高锰酸钾

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

n-3高不饱和脂肪酸对黑鲷幼鱼生长及脂肪代谢的影响

引用

水产学报 2009年第4期33卷 639-649页

作者：马晶晶邵庆均许梓荣周凡钟观运宋文新 owari Ngandeali Bergo 浙江大学动物科学学院山东省海洋水产研究所

研究了饲料中不同水平n-3 HUFA(0.79%,0.83%,0.85%,0.88%,0.92%,0.94%;DHA/EPA=2.8/1)对黑鲷幼鱼生长及脂肪代谢的影响。结果显示:(1)黑鲷幼鱼肝体指数(HSI)及腹脂率(IPF ratio)随饲料中n-3 HUFA含量的增加而减小,且于0.92%和0.94%组时显著低于其他各组;脂肪细胞直径呈减小趋势,其中0.94%组显著小于0.85%组;肌肉脂肪含量受n-3 HUFA的影响显著,于0.88%组时达到最低。各组全鱼水份和脂肪含量差异不显著(P>0.05)。肝脏、肌肉及腹腔脂肪组织饱和脂肪酸(∑SFA)和C16∶0含量均随饲料n-3HUFA水平增加呈下降趋势,而∑n-3 HUFA呈显著上升趋势。各组织中DHA/EPA不受饲料脂肪酸组成的影响。以增重率为参考指标,二次回归分析结果表明,黑鲷幼鱼[(8.08±0.09)g]获得最佳增重时对饲料中n-3 HUFA的需要量为0.87%DM;(2)黑鲷幼鱼肝脏脂肪酸合成酶(FAS)活性及基因表达水平均在n-3 HUFA>0.92%时有显著下降(P<0.05);腹腔脂肪激素敏感脂肪酶(HSL)活性及基因表达水平均随饲料中n-3 HUFA的添加呈升高趋势(P<0.05),且高含量n-3 HUFA(0.94%)可使HSL活性增加近一倍。结果表明,饲料中n-3HUFA通过同步调控脂肪合成与分解两个过程影响黑鲷幼鱼脂肪代谢。

关键词：黑鲷 n-3高不饱和脂肪酸生长脂肪代谢脂肪酸合成酶激素敏感脂肪酶

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

感冒的时候我会让体能教练帮我开处方

引用

汽车时代 2009年第3期 80-80页

作者： Masahiro owari 高嵩（日译中）

去年比利时大奖赛的时候，曾听说可能会进行兴奋剂检查，但没有叫我。所以，我还没有在F1接受兴奋剂检查的经历。但是，在参加日本F3和GP2比较的时候，各有过一次。比赛结束后，在医疗中心或控制塔当中被隔离的小房间里。4、5个车手被... 详细信息

去年比利时大奖赛的时候，曾听说可能会进行兴奋剂检查，但没有叫我。所以，我还没有在F1接受兴奋剂检查的经历。但是，在参加日本F3和GP2比较的时候，各有过一次。比赛结束后，在医疗中心或控制塔当中被隔离的小房间里。4、5个车手被叫来接受兴奋剂检查。

关键词：处方教练体能感冒兴奋剂医疗中心比利时检查

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：