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標題: | 區域性氣候條件決定埋葬蟲族群滯育的時程 Local climate condition determines diapause timing in burying beetle populations |
作者: | Hao Chen 陳澔 |
指導教授: | 沈聖峰(Sheng-Feng Shen) 沈聖峰(Sheng-Feng Shen | shensf@sinica.edu.tw | ), |
關鍵字: | 尼泊爾埋葬蟲,物候,滯育時程,緯度漸變,區域性氣候條件, burying beetle (Nicrophorus nepalensis),phenology,diapause timing,latitudinal cline,local climate condition, |
出版年 : | 2022 |
學位: | 碩士 |
摘要: | 氣候變遷已對全球的生態系造成衝擊;動植物的物候逐年改變,也加劇了各物種間的物候不匹配。研究同種不同族群的物候適應性,將有助於預測其在環境變遷下的生態後果。許多生物的物候時程隨緯度漸變;然而,此通則運用在局部地理尺度的鄰近族群時卻有其侷限性。儘管部分研究嘗試提出解釋,說明區域性氣候條件可能也會影響族群的物候時程,但卻未曾有實證研究探討其生理適應機制。因此,本研究以相鄰的尼泊爾埋葬蟲(Nicrophorus nepalensis)島鏈族群:日本的奄美大島、沖繩和臺灣的烏來,來瞭解當地溫度條件如何決定夏季滯育物候的啟動時程。我們發現,不同族群的埋葬蟲演化出顯著的滯育時程差異,且不隨緯度漸變。反而與滯育時間生態區位分化的預測一致:受春季高溫影響,沖繩族群較高緯的奄美與低緯的烏來族群更早開始休眠。本研究彰顯區域性的氣候條件對物候的適應至關重要,此結果可用於後續評估不同族群在暖化下的脆弱程度。 Anthropogenic climate change has been threatening the global ecosystem by inducing shift of circannual rhythms and thus exacerbates phenological mismatch between interactive species or between species and environment. Studying phenological adaptations of different populations helps to predict the ecological consequences of environmental changes. The phenological timing of many organisms varies along the latitudinal gradient; however, this general rule has limitations when applied to neighboring populations at regional geographic scales. Although some studies have proposed a tentative explanation that local climatic conditions may also affect the phenological timing of populations, no empirical study has ever been conducted to investigate the physiological mechanisms underlying the adaptive pattern. Here, we used burying beetle (Nicrophorus nepalensis) populations from three neighboring islands (Amami Oshima and Okinawa in Japan, and Wulai in Taiwan) to examine how local temperature conditions induce their summer diapause. Results showed that the three burying beetle populations had significantly different diapause induction timing without latitudinally clinal variation. Instead, it was consistent with the prediction of temporal niche partition: the Okinawa population entered reproductive diapause earlier than the Amami and Wulai populations due to higher spring temperature in Okinawa than that in Amami and Wulai. This study highlights the important role of local climatic conditions in phenological adaptation, and the results lay the foundation for future evaluation of bury beetle population vulnerability under a changing world. |
URI: | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/85987 |
DOI: | 10.6342/NTU202203518 |
全文授權: | 同意授權(全球公開) |
電子全文公開日期: | 2022-09-27 |
顯示於系所單位: | 生態學與演化生物學研究所 |
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U0001-1809202200143000.pdf | 7.97 MB | Adobe PDF | 檢視/開啟 |
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