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Rain, dew, and humid air as drivers of morphology, function and spatial distribution in epiphytic lichens
It is suggested that lichens are optimally designed to utilize dew rather than rain, consistent with literature emphasizing dew as a driver for annual C-assimilation in chlorolichens. Expand
The Lobarion , an Epiphytic Community of Ancient Forests Threatened by Acid Rain
Chemical microhabitat differentiation was most clear in edaphically poor sites, and the restriction of a previously ubiquitous Lobaria pulmonaria to mineral-rich microsites on stems is probably an effect of acid rain. Expand
The ecology of Lobarion pulmonariae and Parmelion caperatae in Quercus dominated forests in South-West Norway
P pH and Ca-content in the bark are strongly correlated; Ca seems to originate from Ca-uptake through the roots of the phorophyte, and within a single site the soil also seems to be responsible for the variation in the Mg-content of the bark, being correlated with Ca. Expand
Lichen palatability depends on investments in herbivore defence
Data imply that herbivore defence has evolved in different directions in different lichens, and suggests that generalist herbivores may have shaped evolution in the widespread and highly diverse Parmeliaceae towards high investments in lichen compounds. Expand
Parietin, a photoprotective secondary product of the lichen Xanthoria parietina
Secondary lichen products can be extracted from air-dry thalli of Xanthoria parietina, Xanthoparmelia conspersa and Parmelina tiliacea with 100% acetone without affecting either short-or long-termExpand
Heat resistance and energy budget in different Scandinavian plants
A modified method determining lethal temperatures and energies of activation in the process leading to death during a heat shock, is described, and a linear correlation between hardening temperature, both in the optimal and supraoptimal temperature range, and hardening capability was found. Expand
UV‐induction of sun‐screening pigments in lichens
Melanins and parietin were only synthesized in thalli being hydrated during UV-exposures, suggesting that induction required active metabolism. Expand
The lichens Xanthoria elegans and Cetraria islandica maintain a high protection against UV-B radiation in Arctic habitats
No latitudinal gradient in cortical screening capacity was detected for any of the two species investigated in the field, which implies that Arctic populations maintain a high level of screening pigments in spite of low ambient UV-B, and that the studied lichen species presumably may tolerate an increase inUV-B radiation due to the predicted thinning of the ozone layer over polar areas. Expand
Growth and ecophysiological acclimation of the foliose lichen Lobaria pulmonaria in forests with contrasting light climates
Bi biomass growth and natural occurrence of L. pulmonaria is controlled by a delicate balance between light availability and desiccation risk, and that the species is confined to old forests due to a physiological trade-off between growth potential and fatal Desiccation damage, both of which increase with increasing light. Expand
Interspecific and intraspecific variations in water storage in epiphytic old forest foliose lichens
Within species, WHC was strongly coupled to STM and increased substantially faster with STM in cyanolichens, compensating their inability to use humid air to restore photosynthesis, and photobionts thus play signifi- cant roles in the water economy of lichens. Expand