由于森林栖息地的破碎化，美国的负鼠数量正在下降。
Opossum populations in the U.S. are down due to the fragmentation of their forest habitats.
从森林带到森林草原交错带，森林斑块变小、森林景观破碎化程度提高。
From forest zone to the ecotone, forest patch size decreases while forest fragmentation increases.
食果动物对生境破碎化的适应能力不同，泛性森林动物和广食性动物具有较强的适应性。
Frugivores have different adaptability to the habitat fragmentation, being stronger for the forest generalists and food generalists.
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