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1	Lichen decline in areas with increased nitrogen deposition might be explained by parasitic fungi : A survey of parasitic fungi on the lichen Alectoria sarmentosa after 4 years of nitrogen fertilisation Ström, Caspar January 2011 (has links) Nitrogen (N) deposition in Europe has recently increased and is expected to continue to increase in the future. There is a well-documented decline in lichen diversity with higher N availability, although the mechanisms behind this are poorly known. In this study, I tested whether attacks by fungal parasites increase with higher N deposition. This pattern has been found in a number of studies on vascular plants, but it has never been investigated for lichens. I surveyed dark lesions and discolourings caused by fungi on the pollution-sensitive lichen Alectoria sarmentosa, after 4 years of increased N deposition in a whole tree fertilisation experiment in a boreal spruce forest. I found two species of fungi growing on the investigated lichen thalli. One of these species responded positively to increased N deposition. The results show that lichens can suffer from increased parasite attacks under a higher N load. Further studies using multiple lichen species and many years of recording are needed to understand the importance of parasites for the response of whole lichen communities to an increased N load. parasitic fungi lichen diversity Alectoria sarmentosa nitrogen deposition Biology Biologi
2	Manganese as a site factor for epiphytic lichens / Mangan als Standortfaktor für epiphytische Flechten Paul, Alexander 27 April 2005 (has links) No description available. 580 Pflanzen (Botanik) WWH 000 WVR 200 WHA 000 Mathematics and Natural Science Flechtenökologie Hypogymnia physodes Lecanora conizaeoides Bryoria fuscescens Alectoria sarmentosa Lobaria pulmonaria Nephroma helveticum Leptogium saturninum Mangan Schwermetalltoleranz Ultrastruktur Trebouxia Nostoc Röntgenmikroanalyse Chlorophyllfluoreszenz lichen ecology Hypogymnia physodes Lecanora conizaeoides Bryoria fuscescens Alectoria sarmentosa Lobaria pulmonaria Nephroma helveticum Leptogium saturninum manganese heavy metal tolerance ultrastructure Trebouxia Nostoc X-ray microanalysis chlorophyll fluorescence 42.44 42.48 42.51 42.41

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Lichen decline in areas with increased nitrogen deposition might be explained by parasitic fungi : A survey of parasitic fungi on the lichen Alectoria sarmentosa after 4 years of nitrogen fertilisation

Manganese as a site factor for epiphytic lichens / Mangan als Standortfaktor für epiphytische Flechten