Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1038/ismej.2014.47 |
Habitat stress initiates changes in composition, CO2 gas exchange and C-allocation as life traits in biological soil crusts | |
Colesie, Claudia1; Green, T. G. Allan2,3; Haferkamp, Ilka4; Buedel, Burkhard1 | |
通讯作者 | Colesie, Claudia |
来源期刊 | ISME JOURNAL
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ISSN | 1751-7362 |
EISSN | 1751-7370 |
出版年 | 2014 |
卷号 | 8期号:10页码:2104-2115 |
英文摘要 | Biological soil crusts (BSC) are the dominant functional vegetation unit in some of the harshest habitats in the world. We assessed BSC response to stress through changes in biotic composition, CO2 gas exchange and carbon allocation in three lichen-dominated BSC from habitats with different stress levels, two more extreme sites in Antarctica and one moderate site in Germany. Maximal net photosynthesis (NP) was identical, whereas the water content to achieve maximal NP was substantially lower in the Antarctic sites, this apparently being achieved by changes in biomass allocation. Optimal NP temperatures reflected local climate. The Antarctic BSC allocated fixed carbon (tracked using (CO2)-C-14) mostly to the alcohol soluble pool (low-molecular weight sugars, sugar alcohols), which has an important role in desiccation and freezing resistance and antioxidant protection. In contrast, BSC at the moderate site showed greater carbon allocation into the polysaccharide pool, indicating a tendency towards growth. The results indicate that the BSC of the more stressed Antarctic sites emphasise survival rather than growth. Changes in BSC are adaptive and at multiple levels and we identify benefits and risks attached to changing life traits, as well as describing the ecophysiological mechanisms that underlie them. |
英文关键词 | Antarctica carbon allocation gas exchange lichens life traits net photosynthesis |
类型 | Article |
语种 | 英语 |
国家 | Germany ; Spain ; New Zealand |
收录类别 | SCI-E |
WOS记录号 | WOS:000342764600013 |
WOS关键词 | WATER-VAPOR UPTAKE ; GROWTH-RATES ; LICHEN ; DESERT ; LAND ; PHOTOSYNTHESIS ; CYCLES ; CARBON ; FIELD ; ECOPHYSIOLOGY |
WOS类目 | Ecology ; Microbiology |
WOS研究方向 | Environmental Sciences & Ecology ; Microbiology |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/182834 |
作者单位 | 1.Univ Kaiserslautern, Dept Plant Ecol & Systemat, D-67663 Kaiserslautern, Germany; 2.Univ Complutense, Dept Biol Vegetal 2, E-28040 Madrid, Spain; 3.Univ Waikato, Dept Sci Biol, Hamilton, New Zealand; 4.Univ Kaiserslautern, Dept Plant Physiol, D-67663 Kaiserslautern, Germany |
推荐引用方式 GB/T 7714 | Colesie, Claudia,Green, T. G. Allan,Haferkamp, Ilka,et al. Habitat stress initiates changes in composition, CO2 gas exchange and C-allocation as life traits in biological soil crusts[J],2014,8(10):2104-2115. |
APA | Colesie, Claudia,Green, T. G. Allan,Haferkamp, Ilka,&Buedel, Burkhard.(2014).Habitat stress initiates changes in composition, CO2 gas exchange and C-allocation as life traits in biological soil crusts.ISME JOURNAL,8(10),2104-2115. |
MLA | Colesie, Claudia,et al."Habitat stress initiates changes in composition, CO2 gas exchange and C-allocation as life traits in biological soil crusts".ISME JOURNAL 8.10(2014):2104-2115. |
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