河川域に侵入・繁茂する帰化植物オオキンケイギクの現状と対策に関する研究-河川生態系にあたえる影響評価と環境保全対策

江河地区入侵繁盛的归化植物日本立碗藓现状及对策研究——河流生态系统影响评价及环境保护措施

• 批准号: 11780403
• 负责人: 牧 理子
• 金额: $ 1.28万
• 依托单位: Ehime University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Encouragement of Young Scientists (A)
• 财政年份: 1999
• 资助国家: 日本
• 起止时间: 1999 至 2000
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-11780403/
• 关键词: 撹乱; 栄養繁殖; 種子繁殖; 近交係数; 集団間分化; 遺伝的分化; 遺伝的多型; 種内変異; 個体間差異; 発芽率

1.生態学的調査(1) 野外調査野外におけるオオキンケイギクの動態を調査するため昨年度からさらに継続して調査を行った.愛媛県一級河川の重信川に調査区を設定し昨年度に加えさらに2カ所を調査区域とした.一ヶ月ごとに実生の出現頻度,個体の成長調査を行った.その結果,毎年の出水による攪乱によって,できた裸地にオオキンケイギクの実生が出現し,定着をしていることが明らかとなった.その際,裸地の形成時期に関わらずどの時期の裸地にもうまく侵入していることがオオキンケイギクの侵入・定着に大きな原因があると考えられた.どのようにしていつでも裸地に侵入が可能なのかに関しては種子発芽実験によって,その定着時期の特定を行った.(2) 種子発芽実験昨年度は野外から個体ごとに種子をサンプリングして発芽実験を行ったが,本年度は種子生成時期にも着目して発芽実験を行った.さらに,昨年度とは違った温度条件でも発芽実験を行った.その結果,オオキンケイギクの発芽は発芽温度域がかなり広範囲であること,また,種子の休眠の度合いがかなりバラバラであることが示された.また,休眠解除に有効な冷湿処理,硫酸処理などはそれほど有効ではなく,反応は個体内でも様々に異なっていることが示された.2.遺伝学的調査本年度は四国内の様々な領域に侵入しているオオキンケイギクの集団間変異、集団間分化についてFST,GSTなどの指標値を求めることで浸入がどのように起こっているかについての推測を行った.その結果,たとえば重信川の河川内では集団間の分化はそれほど大きくなく,全く同じ集団と考えられるが,道路中央分離帯,道路法面,河川内に侵入しているオオキンケイギクはどの集団も隣接しているにもかかわらず集団間分化が大きいことが認められた.つまり,侵入は複数回,様々な異なった遺伝的バックグラウンドを持った集団が侵入した可能性が示された.

1. Health education (1) in the field, there are no problems in the field, but in the field, there are no problems in the field. The setting of the first-level Riverside heavy River Trail area of Yuanyuan County was set to increase the number of traps in the first class of the first-level Rivers and Rivers of the Yangtze River, Chongqing and Sichuan Province. Once a month, the degree of health occurs, and the individual grows up and grows up. The results showed that every year, the water was out of order, the water was out of order, the water was out of the water, the water was out of order, the water was out of the water, the water was out of order, the water was out of the water, the water was out of order, the water was out of the water, the water was out of During the formation of bare land, the reason for the invasion of bare land is due to the formation of uncovered land. It is possible that a child may invade the ground in such a way that it is possible to do so, and the time is set for a specific period of time. (2) in the field last year, there was an accident in the field, and in the current year, the generation time of the plant was focused on the production of the bud. (2) in the last year, in the field, in the middle of the year, in the field, in the middle of last year, and in the current year. Last year, the temperature conditions were affected by temperature conditions. The results show that the temperature range of the bud in the temperature range of the bud indicates that the temperature range of the bud is in the range of the temperature range. There are cold and wet conditions for the release of dormancy, sulphuric acid treatment, and so on. 2. In the current year, there have been intrusions in the field of economic cooperation in China. In the current year, there have been intrusions in the field of economic cooperation in China. In this year, there have been intrusions in the field of economic development in China. In the current year, there have been intrusions in the field of economic development in China. This year, there have been intrusions in the field of economic cooperation in China. This year, there have been intrusions in the field of medical information in the field of domestic trade. According to the results of the test, it is important to believe that the distribution network in the river is responsible for the differentiation of the railway network in the river. in the same network, the central division of the road, the normal surface of the road, and the intrusion in the river are important. The number of intrusions is complex, the number of intrusions is complex, and the possibility of intrusions is indicated.