. bao hu sheng wu xue. botany. 稳å®ç¶æ å¾æªæ¥40å¹´éï¼åè¥ä¸éåä¿æ¤æªæ½ï¼å¤§é¢ç§¯çççå°ä¼é-å°äººç±»æ´»å¨çæ害æç ´åï¼å¼èª Bryant etal. 1998 ) æ鱼类ãè¤ç±»åå ¶ä»å¨ç©ï¼ä»¥åç¸è¯çç¸éæ¾æ°°åç©æ¥æ¶éå°é幸å-çç©çæææ¹å¼< èæ¼ å. 许å¤å-£èæ§å¹²æ±ççå¢ç±äºäººç±»æ´»å¨çç ´åèéåæèæ¼ ï¼è¿ä¸è¿ç¨ç§°ä½èæ¼ å (desertification) (Reynolds et al. 2007) 0è¿äºèå¼±çåå¹²æ±ç¾¤è½å æ¬èå°ãç-带è½å¶æå温 带çä¸ã å¹²æ±æåå¹²æ±å°åºè¦ç大约40%çå ¨çåå°é¢ç§¯ï¼å¹¶ä¸æ¯10亿人æ°èµä»¥çå-ç家å-ã å°è¿æ10%~20%çå¹²æ±å°åºè³å°æ¯ä¸-度èæ¼ åï¼è³å°ä¸§ 失äºæ¤ç©ç产è½åç25% (Neffet al. 2005)ãè¿äºå°åºæå éååä¸èä½ï¼ä½éå¤ç§æ¤ï¼ç¹å«æ¯å¨å¹²æ±åå¤
. bao hu sheng wu xue. botany. 稳å®ç¶æ å¾æªæ¥40å¹´éï¼åè¥ä¸éåä¿æ¤æªæ½ï¼å¤§é¢ç§¯çççå°ä¼é-å°äººç±»æ´»å¨çæ害æç ´åï¼å¼èª Bryant etal. 1998 ) æ鱼类ãè¤ç±»åå ¶ä»å¨ç©ï¼ä»¥åç¸è¯çç¸éæ¾æ°°åç©æ¥æ¶éå°é幸å-çç©çæææ¹å¼< èæ¼ å. 许å¤å-£èæ§å¹²æ±ççå¢ç±äºäººç±»æ´»å¨çç ´åèéåæèæ¼ ï¼è¿ä¸è¿ç¨ç§°ä½èæ¼ å (desertification) (Reynolds et al. 2007) 0è¿äºèå¼±çåå¹²æ±ç¾¤è½å æ¬èå°ãç-带è½å¶æå温 带çä¸ã å¹²æ±æåå¹²æ±å°åºè¦ç大约40%çå ¨çåå°é¢ç§¯ï¼å¹¶ä¸æ¯10亿人æ°èµä»¥çå-ç家å-ã å°è¿æ10%~20%çå¹²æ±å°åºè³å°æ¯ä¸-度èæ¼ åï¼è³å°ä¸§ 失äºæ¤ç©ç产è½åç25% (Neffet al. 2005)ãè¿äºå°åºæå éååä¸èä½ï¼ä½éå¤ç§æ¤ï¼ç¹å«æ¯å¨å¹²æ±å大é£å¹´é´ï¼å¸¸ 常ä¼å¯¼è´å壤侵èåå壤ææ°´åä¸éã家çè¿åº¦åé£æ¤è¢«ã åå°é-å家ççè·µè¸ï¼è§ç¬¬64页ï¼ä»¥å人类ç ä¼æ£®æç¨ä½ èªæï¼å ¶ç»æ导è´åå°è¦çä¸éåå壤æµå¤±ä¸¥éãè¿ä¸èæ¼ åè¿ç¨ï¼å¨å¾å¤§ç¨åº¦ä¸ç»çç© ç¾¤è½é ææ æ³æ¢å¤çéåã ä¸çä¸æ¾æ900ä¸km2çåå¹²æ±å°åºå·²ç»äººä¸ºè½¬åæäºæ²æ¼ ï¼è¿ä¸èæ¼ åè¿ç¨å¨éæ´² çæåæå°åºï¼æåææ²æ¼ åé¨ï¼æ为严éï¼å½å°å¤æ°å¤§ååºä¹³å¨ç©é-å°ç-ç»çå¨èãæ åæç®åæ10亿人å£ï¼è¿ä¸æ°éæ¯åå°å¯æç»-æ¿è½½éçåãé¤éæé«åä¸èä½æ¹å¼ã æ¶é¤è´«ç©·ã稳å®ç¤¾ä¼åæ§å¶äººå£å¢é¿ç计åå¾ä»¥å®æ½ï¼å¦åè¿ä¸æ-¥èæ¼ åæ¯æ æ³é¿å çã è¦
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