Ironically one of the problems is bees. The hives that are carted from farm to farm for pollination don't neatly stay in the intended crop area and compete for food with native species. Most bee species do not live in colonies or produce honey, but are vital pollinators, servicing many plants that honey bees would ignore . These are also the ones most vulnerable to agri-chemicals.

As the pollination rates fall on plants in-the-wild, that affects the wildlife that depends on foraging. This is not just affecting human nutrition.