全球暖化是當今世界所面臨最重要的環境議題之一，尤其對於人類族群及自然生態系統造成的負面影響。在過去的一個世紀來，全球平均地表溫度上升約0.6℃，太魯閣國家公園地區10年來平均溫度也逐步上升。伴隨著全球暖化也影響著全球氣候的變化，自21世紀以來，觀察到許多極端天氣與氣候的變化。臺灣與全球多數地區相同，正面臨著氣候暖化趨勢的影響。
了解生物多樣性對於自然資源保育至關重要，台灣擁有豐富的生物多樣性資源及特有物種，但已建立基本分類及生態資料的種類仍不及台灣全部物種的一半，在缺乏了解的情況下，一些開發行為乃造成自然資源的破壞。在動物類群中，鱗翅目昆蟲為物種多樣性很高的類群之一，是極具有研究價值的類群。蛾類對於氣候、環境變化敏感度高，蛾類的分布情況會隨著不同海拔高度、不同林相及不同的氣候變化而產生不同群集的組合，本研究以紫外線燈定期調查蛾類數量的月變化，希望以本研究結果了解太魯閣國家公園各海拔蛾類多樣性變化。
本研究以太魯閣國家公園為例，於海拔100公尺至3000公尺設置8個主要樣點進行蛾類資源調查，並以蛾類的物種豐富度(species richness)及常用的多樣性指數—Simpson’s index(D’)及Shannon- Winner index (H’)，探討蛾類於不同海拔分布情形。結果顯示，本研究共紀錄太魯閣國家公園境內蛾類19科481種2149隻次，且蛾類物種豐富度隨海拔越高而降低，呈現線性遞減關係。而在與過去的監測資料對比下，顯示出除位於高海拔的小風口樣區外，其餘各海拔多樣性皆有顯著下降的趨勢。最後，本實驗嘗試篩選出與各海拔整體群集相關性高的指標物種。藉此指標物種的群聚波動或依其特性能反映不同的環境現況，不僅能了解大範圍的環境變動，亦能探究局部性細微環境變化。

Global warming is one of the most important environmental issues in the world today, chiefly clue to its negative impact on human populations and natural ecosystems. Over the past century, the global average temperature has increased by 0.6 Celsius, and the average temperature in Taroko National Park has also gradually increased over the past 10 years. Global warming also affects global climate change. Since the 21st century, many extreme weather and climate changes have been observed. Taiwan is facing the impact of climate change like most other parts of the world, too.
Understanding biodiversity is one of the most important aspects of natural resource conservation. Taiwan hosts rich biodiversity resources and endemic species, but the basic classification and ecological data for many organisms are still scanty. Human activities have inadvertently resulted in the destruction of natural resources due to the lack of knowledge of these data. Among animal groups, Lepidoptera is one of the groups with high species diversity and research value. Moths are highly sensitive to climate and environmental changes. The distribution of moths may produce different cluster combinations with different altitudes, different forest phases, and different climate changes. The present study uses ultraviolet lamps to regularly investigate monthly changes in the number of moths, with the hope to that use the results of this study to understand the changes in moth diversity across various altitudes in Taroko National Park.
We set up eight main sample sites to investigate moth resources from altitudes of 100 meters to 3,000 meters and calculated the moths’ species richness, the commonly used diversity index— Simpson's index (D') and Shannon-Winner index (H') to explore the distribution of moths at different altitudes. The results showed that the species richness of moth species decreased with increase in altitude, showing a linearly decreasing relationship. Compared to the data collected 10 years ago, except for the Xiao Feng Kou area located at high altitude, the diversity at all other altitudes has a significant downward trend. Finally, this experiment attempts to establish indicator species representing habitats of different altitudes. By monitoring the fluctuations of these indicator species under different environmental conditions, we can not only understand large-scale environmental changes, but also explore local subtle environmental changes.

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