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题目材料：
Many herbivorous insects utilize plant resources during small windows of development or during short periods when plants are of suitable quality. Such temporal associations have been documented in numerous systems, where temporal constraints limit insect abundance and affect insect feeding strategy. Classic studies of winter moths, for example, suggest that the synchrony of larvae with leaf emergence is a primary determinant of larval success. Because many insect-plant associations have a temporal component, they may be negatively affected by environmental changes; some scientists fear, for example, that global warming may decouple insect-plant synchrony Hellman, however, notes that the timing of insect-plant synchrony is affected by many factors, including insects behavioral and physiological ability to adapt to changing host plant quality and the availability of alternative host resources.
以上解析由 考满分老师提供。
