| (1)藻类、水草、空心菜、苜蓿草、芦蒿、香莲；竞争和捕食；3 (2)分层 (3)次生演替 (4)先增后减 (5)物质循环再生 (6)c 1 /(a 1 ＋b 1 ＋c 1 ＋d 1 )[或(a 2 ＋b 2 ＋c 2 ＋d 2 )/(a 1 ＋b 1 ＋c 1 ＋d 1 )] |
| (1)藻类、水草、空心菜、苜蓿草、芦蒿、香莲；竞争和捕食；3 (2)分层 (3)次生演替 (4)先增后减 (5)物质循环再生 (6)c 1 /(a 1 ＋b 1 ＋c 1 ＋d 1 )[或(a 2 ＋b 2 ＋c 2 ＋d 2 )/(a 1 ＋b 1 ＋c 1 ＋d 1 )] |
