埋土種子による絶滅危惧水生植物ツツイトモ - 河川環境管理財団

1812158 2004 2004 Tanaka, N., Momohara, A., Sakayama, H., and Uehara, K., 2003, Charaspecies that emerged from 40-years-old sediments from Lake Teganuma, centralJapan. Natural History Research 7(2) 101-105. Uehara, K., Tanaka, N., Momohara, A., and Zhou, ZK., 2006. Geneticdiversity of an endangered aquatic plant, Potamogeton lucens subspeciessinicus. Aquatic Botany, 85, 350-354.2

4.1)4.2)4.3)3

Potamogeton panormitanus Biv.1994 0.5mm P. pusillusL. 1.5 2cm 5 7mm1994 2 2.5mm 1.2 2mm 1 1.5mm 1.5cm 10 100 20 10 P. obtusifolius Mert. et Koch. P. maackianus A.Benn. P. compressus L. P. octandrus Poir. P. orientalis Hagstr. P. dentatusHagstr. IA P. cristatus Regel et Maack P. kamogawaensis Miki P. nipponicus Makino6

P. praelongus Wulf B P. alpinus Balbis P. pectinatus L. IA CR 50E 12 19377

1994 8

2001 2001 2002 2003 2004 2001 2001 10

2002 2001 2002 11

2002 12

2005 4.12002 7000 13400cm 5000 0.25mm 5000 0.7mm 2000cm3 13

2000cm 3 2 31 2000cm 3 10 100 2001 10cm 2003 4.22001 2002 14

5.3) 23

21 4cm 0cm 26

22 4cm 0cm 23 4cm 0cm 27