Gahn says these findingsare consistent with something called the “plant apparency theory, ”which states that the most readily seen plants are those that are mostlikely to be attacked by predators.

岗恩认为这些发现与有人称之为“植物可见性理论”(plant apparency theory)的解释相一致。 这一理论认为最容易被看到的植物最有可能受到捕食者的攻击。

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Those plant species are also themost likely to develop broader defenses against predators.

而这些植物种类也是最有可能进化为最具抵抗能力的物种。

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Some plant species, for instance, protect themselves from predators by emitting volatile compounds when their leaves get damaged.

例如有些物种，当它们的叶子被破坏时会散发出一种化学物来保护自己。

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Previous studies of wild-plant ecology have shown that the main threat to a plant's existence comes not from insect predators but from competition with other plants.

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Plant-eaters of prehistoric origin, rhinos have no known predators other than humans.

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In the late Jurassic period, this fleet-footed plant eater, known as Dryosaurus altus, needed those powerful hindquarters to scurry away from its many predators.

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