摘要：Agricultural syndromes of production can be recognized in both historical and contemporary times. Recentliterature in ecology focuses on alternative ecological states and the tipping points that may separate them, suggesting a pointof view that "regime" changes will happen at those points. In agricultural ecosystems the idea of a regime is equivalent to asyndrome of production and there is no reason not to expect that regime switches will occur when tipping points are reached.Using very minimal qualitative models of economic and ecological forces, it is shown that the basic structure of regime changeexpected in natural ecosystems might be also expected in agroecosystems. In particular structures of nonlinearity suggestalternative syndromes and the potential for catastrophic shifts resulting from small changes in driving conditions. Furthermore,relaxing the assumption of monotonicity reveals the potential for such catastrophic shifts resulting from stochastic forces orchaotic dynamics, even in the absence of changes in driving conditions
关键词：agriculture; production syndromes; regime change; stability
