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Plant Functional Traits: an Ecophysiological Perspective

從生態生理學觀點看植物機能性特徵

摘要


A new, ecophysiologically focussed approach to quantifying plant functional traits is described, including brief descriptions of techniques for measurement. Traits included relate to sun/ shade adaptation, adaptation and exposure to drought stress, adaptation to salt stress, photosynthetic pathways, adaptations to temperature extremes, and adaptation to low elemental availability stress. These functional traits are not necessarily intended to supplant those currently in use, but are instead intended to improve the functional characterization of an ecological unit of vegetation. Thus, these more ecophysiologically-relevant traits might be used alone or in addition to morphological and other traits currently in use, depending on the questions being addressed by the investigator. An attempt has been made to propose the use of traits that are relatively time-independent, taxon-independent, and that can be compared to other major ecophysiological groupings of plants (e.g., sun/shade plants, mesophytes/xerophytes, stressed/nonstressed plants). A number of the traits are stress-related, yet can be used to gain insight into plant adaptations to local environmental/microenvironmental conditions, regardless of stress level.

並列摘要


本篇說明一種新穎、聚焦於生態生理學的方法以定量植物機能性特徵,也包括相關量測技術的簡短說明。植物特徵包括與日照/遮蔭適應、對於乾旱逆壓暴露的適應、對鹽份逆壓的適應、光合作用途徑、對極端溫度的適應以及對低元素供應逆壓的適應等。這些機能性特徵並非試圖取代目前已在使用者,而是作為改善一生態單元內植生機能性界定之目的。因此這些更為生態生理學相關的特徵可予單獨應用或是附加於目前使用的形態與其他特徵;端視研究者探討的問題為何而定。本篇並嘗試提出利用一些相對不隨時間改變、不因分類群差異,且可與其他主要生態生理學群組比較之植物特徵(例如,日照/遮蔭植物、中生植物/乾生植物、受逆壓/未受逆壓之植物)來進行研究。其中一些特徵是與逆壓有關,但不論逆壓的程度,可用以獲取植物對局部環境/微環境條件適應的更深入了解。

並列關鍵字

適應 葉綠素 δ^(13)C δ^(15)N 生態學 養份 逆滲透壓 光合作用途徑 溫度

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