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| DOI | 10.1007/s00484-024-02682-w |
| Responses of stem growth and canopy greenness of temperate conifers to dry spells | |
| 发表日期 | 2024 |
| ISSN | 0020-7128 |
| EISSN | 1432-1254 |
| 英文摘要 | Dry spells strongly influence biomass production in forest ecosystems. Their effects may last several years following a drought event, prolonging growth reduction and therefore restricting carbon sequestration. Yet, our understanding of the impact of dry spells on the vitality of trees' above-ground biomass components (e.g., stems and leaves) at a landscape level remains limited. We analyzed the responses of Pinus sylvestris and Picea abies to the four most severe drought years in topographically complex sites. To represent stem growth and canopy greenness, we used chronologies of tree-ring width and time series of the Normalized Difference Vegetation Index (NDVI). We analyzed the responses of radial tree growth and NDVI to dry spells using superposed epoch analysis and further explored this relationship using mixed-effect models. Our results show a stronger and more persistent response of radial growth to dry spells and faster recovery of canopy greenness. Canopy greenness started to recover the year after the dry spell, whereas radial tree growth remained reduced for the two subsequent years and did not recover the pre-drought level until the fourth year after the event. Stem growth and canopy greenness were influenced by climatic conditions during and after drought events, while the effect of topography was marginal. The opposite responses of stem growth and canopy greenness following drought events suggest a different impact of dry spells on trees ' sink and source compartments. These results underscore the crucial importance of understanding the complexities of tree growth as a major sink of atmospheric carbon. |
| 英文关键词 | Tree rings; NDVI; Dry spells; Biomass allocation; Growth response; Topography |
| 语种 | 英语 |
| WOS研究方向 | Biophysics ; Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences ; Physiology |
| WOS类目 | Biophysics ; Environmental Sciences ; Meteorology & Atmospheric Sciences ; Physiology |
| WOS记录号 | WOS:001204467600001 |
| 来源期刊 | INTERNATIONAL JOURNAL OF BIOMETEOROLOGY
 |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/300809 |
| 作者单位 | Charles University Prague; Universidad Politecnica de Madrid |
| 推荐引用方式 GB/T 7714 | . Responses of stem growth and canopy greenness of temperate conifers to dry spells[J],2024. |
| APA | (2024).Responses of stem growth and canopy greenness of temperate conifers to dry spells.INTERNATIONAL JOURNAL OF BIOMETEOROLOGY. |
| MLA | "Responses of stem growth and canopy greenness of temperate conifers to dry spells".INTERNATIONAL JOURNAL OF BIOMETEOROLOGY (2024). |
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