: Ecology :2773760 ;13070600647Email:[email protected]
2002200019932000
Serious issues in the 21th century in the world Population Food supplies Environment Energy sources Diseases
Agricultural land expansion
1 35~38Cyanophyta 1000 2 3
2 CO2O2 4 CO2 O2
3 DDT 50 DDT, DDT
2020
2020
EcologyHaeckel, 1869. Elton1927 Andrewartha, 1954Krebs, 1972
2 Braun-Blaquet, 1932E.P.Odum19561980--E.P.Odum1997Haeckel 1869
60
1962RachelCarson
19704221970422
1973ArneNaess
1992, 1983()2001
[M]20002~3.
1
2
3
4
1
DNA DNA1000
2
3
Observation and description Hypotheses and Experimentation (Model and Simulation)
1 2 X 3
1 2 3
4 Gilbert (1991)Nature
categorical framework;.,,2002.
1
9,21 . 382.
DNA20021023
2020
1 2 3 3
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