Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1111/gcb.13984 |
Can Antarctic lichens acclimatize to changes in temperature? | |
Colesie, Claudia1; Buedel, Burkhard2; Hurry, Vaughan1; Green, Thomas George Allan3,4 | |
2018-03-01 | |
发表期刊 | GLOBAL CHANGE BIOLOGY
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ISSN | 1354-1013 |
EISSN | 1365-2486 |
出版年 | 2018 |
卷号 | 24期号:3页码:1123-1135 |
文章类型 | Article |
语种 | 英语 |
国家 | Sweden; Germany; Spain; New Zealand |
英文摘要 | The Antarctic Peninsula, a tundra biome dominated by lichens and bryophytes, is an ecozone undergoing rapid temperature shifts. Such changes may demand a high physiological plasticity of the local lichen species to maintain their role as key drivers in this pristine habitat. This study examines the response of net photosynthesis and respiration to increasing temperatures for three Antarctic lichen species with different ecological response amplitudes. We hypothesize that negative effects caused by increased temperatures can be mitigated by thermal acclimation of respiration and/or photosynthesis. The fully controlled growth chamber experiment simulated intermediate and extreme temperature increases over the time course of 6 weeks. Results showed that, in contrast to our hypothesis, none of the species was able to down-regulate temperature-driven respiratory losses through thermal acclimation of respiration. Instead, severe effects on photobiont vitality demonstrated that temperatures around 15 degrees C mark the upper limit for the two species restricted to the Antarctic, and when mycobiont demands exceeded the photobiont capacity they could not survive within the lichen thallus. In contrast, the widespread lichen species was able to recover its homoeostasis by rapidly increasing net photosynthesis. We conclude that to understand the complete lichen response, acclimation processes of both symbionts, the photo- and the mycobiont, have to be evaluated separately. As a result, we postulate that any acclimation processes in lichen are species-specific. This, together with the high degree of response variability and sensitivity to temperature in different species that co-occur spatially close, complicates any predictions regarding future community composition in the Antarctic. Nevertheless, our results suggest that species with a broad ecological amplitude may be favoured with on-going changes in temperature. |
英文关键词 | Antarctica biological soil crusts climate warming lichen net photosynthesis thermal acclimation Usnea aurantiaco-atra |
领域 | 气候变化 ; 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000425396700022 |
WOS关键词 | SOUTH SHETLAND ISLANDS ; CO2 GAS-EXCHANGE ; SOIL RESPIRATION ; THERMAL-ACCLIMATION ; CLIMATE-CHANGE ; LIVINGSTON ISLAND ; PLANT RESPIRATION ; LEAF RESPIRATION ; SEASONAL-CHANGES ; BYERS PENINSULA |
WOS类目 | Biodiversity Conservation ; Ecology ; Environmental Sciences |
WOS研究方向 | Biodiversity & Conservation ; Environmental Sciences & Ecology |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/16611 |
专题 | 气候变化 资源环境科学 |
作者单位 | 1.Swedish Univ Agr Sci, Dept Forest Genet & Plant Physiol, Umea, Sweden; 2.Univ Kaiserslautern, Dept Plant Ecol & Systemat, Kaiserslautern, Germany; 3.Univ Complutense, Fac Farm, Dept Biol Vegetal 2, Madrid, Spain; 4.Univ Waikato, Dept Biol Sci, Hamilton, New Zealand |
推荐引用方式 GB/T 7714 | Colesie, Claudia,Buedel, Burkhard,Hurry, Vaughan,et al. Can Antarctic lichens acclimatize to changes in temperature?[J]. GLOBAL CHANGE BIOLOGY,2018,24(3):1123-1135. |
APA | Colesie, Claudia,Buedel, Burkhard,Hurry, Vaughan,&Green, Thomas George Allan.(2018).Can Antarctic lichens acclimatize to changes in temperature?.GLOBAL CHANGE BIOLOGY,24(3),1123-1135. |
MLA | Colesie, Claudia,et al."Can Antarctic lichens acclimatize to changes in temperature?".GLOBAL CHANGE BIOLOGY 24.3(2018):1123-1135. |
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