Adaptation of Asia-Pacific forests to climate change     

Guangyu Wang  Tongli Wang  Haijun Kang  Shari Mang  Brianne Riehl  Brad Seely  Shirong Liu  Futao Guo  Qinglin Li  John L. Innes 《林业研究》2016,27(3):469-488

Climate change is a threat to the stability and productivity of forest ecosystems throughout the Asia-Pacific region. The loss of forests due to climate-induced stress will have extensive adverse impacts on biodiversity and an array of ecosystem services that are essential for the maintenance of local economies and public health. Despite their importance, there is a lack of decision-support tools required to evaluate the potential effects of climate change on Asia-Pacific ecosystems and economies and to aid in the development of regionally appropriate adaptation and mitigation strategies. The project Adaptation of Asia-Pacific Forests to Climate Change, summarized herein, aims to address this lack of knowledge and tools and to provide support for regional managers to develop effective policy to increase the adaptive capacity of Asia-Pacific forest ecosystems. This objective has been achieved through the following activities: (1) development of a high-resolution climate downscaling model, ClimateAP, applicable to any location in the region; (2) development of climate niche models to evaluate how climate change might affect the distribution of suitable climatic conditions for regionally important tree species; (3) development and application of forest models to assess alternative management strategies in the context of management objectives and the projected impacts of climate change; (4) evaluation of models to assess forest fire risk and the relationship between forest fire and climate change; (5) development of a technique to assess ecosystem carbon storage using LiDAR; and (6) evaluation of how vegetation dynamics respond to climate change using remote sensing technology. All project outputs were developed with a focus on communication and extension to facilitate the dissemination of results to regional forest resource managers to support the development of effective mitigation and adaptation policy.  相似文献   

蒲公英染色体核型分析   总被引：2，自引：0，他引：2  

李国泰  刘海滨 《中国林副特产》2004,(6):11-12

蒲公英的染色体核型国内一直未见报道 ,通过对其中期染色体形态的研究 ,得知其核型为 2n =2M 1 6m 4sm 4st=2 6。  相似文献   

油茶林土壤微生物生态分布及土壤酶活性的研究   总被引：24，自引：3，他引：24  

周国英  陈小艳  李倩茹  兰贵洪 《经济林研究》2001,19(1):9-12

为了了解油茶林土壤肥力状况，我们对株洲地区油茶林地土壤微生物数量和土壤酶活性进行了研究。研究结果表明：根际土壤中的细菌数量明显大于非根际土壤，根际土壤酶的活性高于非根际土壤；新造幼林地土壤微生物数量较萌芽更新林地多，土壤酶的活性也以新造幼林地较萌雅量更新林地土壤高；低改林地土壤微生物数量较未低改林地多，土壤酶的活性也以低改林地高。  相似文献   

沙棘叶子提取物对白化病白鼠由铬诱导氧化胁迫的抗氧化活性评估     

郭海  赵明  S.Geetha  M.Sai Ram  S.S.Mongia  Virendra Singh  G.Ilavazhagan  R.C.Sawhney 《陕西林业科技》2006,(1):90-94

本研究报道沙棘(胡颓子科)对雄性白化病白鼠由铬诱导氧化胁迫的抗氧化活性。氧化胁迫通过对小白鼠进行强制性喂养30 d,以浓度为30 m g/kg的铬相对体重比例的重铬酸钾盐实现。铬促使体重下降,而却明显增加了器官与体重比例。铬处理明显减少了谷胱甘肽的降低,增加了丙二醛和肌氨酸磷酸激酶的水平;而且它还加强了血清中谷氨酸草酰乙酸转移酶和谷氨酸丙酮酸转移酶的浓度。用不同剂量的沙棘叶子提取物(乙醇提取)对保护铬元素诱导的氧化胁迫进行了评估,结果表明叶子提取物在浓度为100到250 m g/kg铬与体重比的情况下可以明显保护动物避免由铬所诱导的氧化伤害。  相似文献   

朝仓花椒组织培养快繁试验   总被引：4，自引：0，他引：4  

郭伟珍  林艳  毕君  赵京献  徐振华  王春荣  王超 《林业科技开发》2005,19(5):19-21

以朝仓花椒为试材，研究了其组培快繁技术。试验表明，4～5月份接种外植体易获得无菌苗；初期适宜的增殖培养基为MS＋6-BA1．0mg／L（单位下同）＋IBA0．2＋3．0％蔗糖，继代增殖培养基为MS＋6-BA0．5＋IBA0．1＋3．0％蔗糖，适宜的生根培养基为1／4MS＋NAA0．3＋2．5％蔗糖，移栽最佳基质为蛭石。  相似文献   

枣授粉受精及胚胎发育研究   总被引：5，自引：0，他引：5  

张学英  彭士琪  郭振怀 《林业科学》2004,40(5):210-212,i002

The processes about pollination, fertilization and embryo development of Chinese Date ‘Wu-he-zao‘ (ziziphus jujuba) were observed by means of lightmicrocope combining histochemical dyeing and fluorescent technique. The results were summarized as follows:The pollen grains germinated on the stigma at the 4th hour after pollination. On the 5th day after pollination,the primary endosperm nucleus formed, and the zygote formed on the 6th day. The double fertilization of Wu-he-zao was the type premitotic syngamy. The first division of the zygote took place after a dormancy for about 6 - 7 days. The proembryonal development of Wu-he-zao belonged to the Solanad type. The development of the endosperm belonged to the nuclear type.  相似文献   

木材皱缩的研究现状及发展趋势          下载免费PDF全文

郭明辉  勾锐 《世界林业研究》2005,18(1):39-42

通过总结和分析国内外关于木材皱缩的研究现状，指出皱缩深度、皱缩因子、体积收缩率、干缩率等4项指标能够合理地评价木材皱缩的程度；采用预冻处理、热处理、加压或拉伸处理以及后期调湿处理能够在一定程度上减少皱缩的产生；并讨论了木材皱缩研究的发展趋势。  相似文献   

锥栗对栗疫病的抗性与苯丙氨酸解氨酶的关系   总被引：2，自引：0，他引：2  

郭文硕 《林业科学》2001,37(Z1):90-93

健康的锥栗(Castanea henryi)皮层中,苯丙氨酸解氨酶(PAL)比活力与抗感病性之间不相关.不同抗病性的锥栗品种接种栗疫菌(Cryphonectria parastttca)后,PAL比活力均上升,接种144 h后,PAL比活力抗病性强的品种比抗病性弱的品种高.接种前以及接种后的各个时间内,木质素含量都是抗病品种比感病品种高.绿原酸的含量与品种的抗病性之间不呈规律性的相关,从绿原酸对栗疫菌菌丝生长影响的测定结果可知,锥栗体内的绿原酸浓度不足以影响栗疫菌.可见,接种后的皮层PAL比活力以及接种前、后的皮层木质素含量可作为衡量锥栗抗病性强弱的指标.  相似文献   

山西省枣树裂果情况调查初报   总被引：4，自引：0，他引：4  

张志善  郭绐仙 《经济林研究》1991,9(1):58-62

裂果腐烂是北方枣区枣子减产的重要原因。1985年9月梅雨季,对山西省53个枣树品种裂果情况进行调查,结果表明:枣果成熟期阴雨天气是导致裂果的主要因子;不同品种裂果程度不同;枣果成熟与裂果有密切关系。选育抗裂品种、调整枣果成熟期是解决裂果腐烂的有效途径。  相似文献   

七叶树种子级别与种子活力及苗木品质的相关性研究   总被引：1，自引：0，他引：1  

张运吉  赵兰勇  郭蕊 《山东林业科技》2005,(2):5-7

以七叶树种子为实验材料，并分级别绘制了种子的吸水曲线、测定了种子活力指数；同时，把种子按不同级别温室播种，分别测定其幼苗的苗高、地径、水势及电导率并作相关性分析。结果表明，种子级别与种子活力有相关性，中粒种子活力最强，小粒种子活力最弱；种子级别与苗木品质也有极显著的相关性，大粒种子萌发苗品质最好，小粒种子萌发苗品质最差。  相似文献