期刊
FUNGAL ECOLOGY
卷 7, 期 -, 页码 59-66出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.funeco.2013.12.001
关键词
Allometry; Canopy gradient; Epiphytes; Lichens; Lobaria pulrnonaria; Lobaria scrobiculata; Pseudocyphellaria crocata; Photobiont; Specific thallus mass; Water holding capacity
资金
- Norwegian Research Council
- The Norwegian Forest Owners' Federation
- Spanish Education Ministry
We measured the water holding capacity per area (WHCA; mg H2O cm (2)), and thus the saturating rainfall (mm), for sympatric cyano- (Lobaria scrobiculata and Pseudocyphellaria crocata) and cephalolichens (Lobaria pulmonaria) along canopy height gradients in boreal rainforests, to quantify the importance of specimen size, photobiont type and branch height as WHCA drivers. Size increased WHCA by a factor of four. Cyanolichens had approximate to 1.5 times higher WHCA than cephalolichens. Finally, branch height significantly increased WHCA for the Lobaria species. Reported responses are consistent with higher optimal rainfall requirements for reproducing versus juvenile specimens, and for cyanolichens versus those with green algal photobionts. Increased WHCA with height in the canopy is consistent with acclimation to stronger evaporative demands: The results highlight the link between rainfall patterns and maximal sizes realized for a given lichen species and habitat, and extend our understanding of why the cyanolichen/green algal lichen-ratio increases in forests with increasing rainfall. (C) 2013 Elsevier Ltd and The British Mycological Society. All rights reserved.
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