《环境昆虫学报》

台湾和日本处在不同的地理纬度上，同属岛屿海洋性气候，前者地域面积远小于后者，拟步甲的物种多样性却大于后者。为弄清楚这些科学问题，作者采用G-F指数对从台湾到日本不同纬度梯度上的拟步甲多样性分布格局进行了比较分析，得到如下初步结论：（1）G-F指数从大到小依次是：台湾(21°N-25°N)（0.826)>日本（24°N-45°N）（0.824)>日本Ⅱ纬度区（30°N-35°N）（0.792)>日本Ⅰ纬度区（24°N-30°N）（0.765)>日本Ⅲ纬度区（35°N-40°N）（0.761)>日本Ⅳ纬度区（40°N-45°N）（0.603）；（2）台湾拟步甲属的多样性（D G）、族的多样性（D F）和G-F指数（D G-F）均最高，分别是4.263、24.464和0.826；（3）各纬度上拟步甲的物种分布情况：台湾（21°N-25°N）（541种)>日本（24°N-45°N）（489种)>日本Ⅰ纬度区（24°N-30°N）（257种)>日本Ⅱ纬度区（30°N-35°N）（231种)>日本Ⅲ纬度区（35°N-40°N）（172种)>日本Ⅳ纬度区（40°N-45°N）（60种）。研究数据显示，G-F指数能较好地反映台湾和日本各地拟步甲族、属的多样性。其物种多样性在纬度上的分布表现为从南向北递减的趋势，并对其基本原因进行分析。作者首次基于台湾和日本两个岛屿拟步甲物种多样性的比较分析，对现有岛屿生物多样性的有关理论提出个人看法，认为岛屿生物地理学的“物种-面积关系理论”中的“岛屿面积越大，物种数量就越多”可能存在一定的局限性，不一定能客观地反映种类众多的现生岛屿昆虫物种多样性的实际情况。

英文摘要:

Taiwan and Japan are in different geographic latitudes but share the same island marine climate. The former region has a much smaller size than the latter, while has a greater species diversity of darkling beetles.Toclear these scientific problems, we used G-F index to compare and assess darkling beetles species diversity and distribution patterns in different latitudinal gradients among Taiwan and the regions of Japan. The preliminary results showed as followed: 1. G-F index of all study regions decreased from large to small: Taiwan (21°N-25°N)(0.826)>Japan (24°N-45°N)(0.824)>Ⅱ latitude area of Japan (30°N-35°N)(0.792)>Ⅰ latitude area of Japan (24°N-30°N)(0.765)>Ⅲ latitude area of Japan (35°N-40°N)(0.761)>Ⅳ latitude area of Japan (40°N-45°N)(0.603); 2. The results showed that the genus diversity (D G), tribe diversity (D-F) and G-F index (D G-F) in Taiwan is the highest, 4.263, 24.464 and 0.826, respectively; 3. The quantity of species distribution of each latitude region: Taiwan (21°N-25°N)(541 species)>Japan (24°N-45°N)(489 species)>Ⅰ latitude area of Japan (24°N-30°N)(257 species)>Ⅱ latitude area of Japan (30°N-35°N)(231 species)>Ⅲ latitude area of Japan (35°N-40°N)(172 species)>Ⅳ latitude area of Japan (40°N-45°N)(60 species). G-F index can reflect the tribe diversity and genus diversity of darkling beetles among Taiwan and the regions of Japan It has been discovered that the species diversity of latitudinal distribution showed a decreasing trend from south to north, and this analysis made the basic reasons clear Based on the analysis of the species diversity of Taiwan and Japan, we put forward personal opinions on the theory of presented island biological diversity The theory of the species-area relationship of island biogeography holds that the lager island has more species This theory may have some limitations, which may not be able to explain the really situations of the extant insect species diversity objectively.

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