Page 3755 of 3767 Results 37541 - 37550 of 37661
Id/Author/Year/TitleOrder by:  Year  Id  Author  Title
121
John A.E. (1989): Note on the sizes of largest thalli of three species of Rhizocarpon (subgenus Rhizocarpon) at a rockslide in the Canadian Rocky mountains, Arctic and Alpine Research, 21(2): 185-187

The largest thallus sizes of three species of Rhizocarpon (subgenus Rhizocarponi growing at a single site are significantly different. In addition, each species appears to respond differently to local changes in microclimate. Jonas Rockslide, Alberta, Canada, is estimated to be at least 500 yr old, rather than the 100 yr old suggested by other researchers EN Read more... 

120
James P.W. et Coppins B.J. (1979): Key to British sterile lichens with Trentepohlia as phycobiont., Lichenologist, 11: 253-262

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119
Jahns H.M. & Smittenberg J.C. (1970): Baeomyces roseus Pers., Ontogenie und Regeneration der Fruchtkörper, Herzogia, 2: 79-88

The ontogeny of the fruiting bodies of Baeomyces roseus is investigated and compared to that of Baeomyces rufus. Baeomyces roseus has ascogons with trichogynes similar to those of Baeomyces rufus. In Baeomyces roseus an apothecium is formed on the surface of the thallus horizontalis. Later it is lifted upwards by the podetium. In Baeomyces rufus the podetium arrises prior to the forming of the apothecium. Therefore the genus should be divided into two subgenera - subg. Baeomyces (with B. roseus) … EN PDF Read more... 

118
Inoue M. (1983): Japanese species of Huilia (Lichenes) (3), Journal of Japanese Botany, 58: 225-236

Huilia percontigua (Nyl.) comb. nov. EN Read more... 

117
Inoue M. (1983): Japanese species of Huilia (Lichenes) (2), Journal of Japanese Botany, 58: 161-173

Huilia chungii (Zahlbr.) comb.nov. and H. flavicunda (Ach.) comb. nov. EN Read more... 

116
Inoue M. (1983): Japanese species of Huilia (Lichenes) (1), Journal of Japanese Botany, 58: 113-128

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115
Innes J. L. (1985): Replication of lichenometric data: errors associated with variations in operator search efficiency, Area, 17: 221-232

The reproducibility oflichen measurements is poor. Errors may arisefrom mismeasurement ofindividual lichen thalli or from failing to locate large thalli. Observers obtained much more consistent results when a quadrat search was repeated. The reproducibility ofRhizocarpon section Rhizocarpon species measurements increases with increasing sample size but the reverse occursfor Rhizocarpon alpicola measurements. Variations in the extent of error occur between different quadrats, but these appear to be … EN Read more... 

114
Innes J.L. (1985): Lichenometry., Progress in Physical Geography, 9(2): 187-254

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113
Innes J.L. (1986): Dating Exposed Rock Surfaces in the Arctic by Lichenometry: The Problem of Thallus Circularity and Its Efect on Measurement Errors, Arctic, 39(3): 253-259

Lichenometry represents an extremely useful dating technique in the Arctic. It is most appropriate for exposed rock surfaces, which are abundant in most arctic environments, and on occasion it represents the only suitable technique for estimating the age of a surface. As a result, Iichenometry is being used in an increasing number of arctic studies. Despite this, controversy still surrounds the manner in which individual thalli are measured. The majority of workers measure either the longest axis … EN Read more... 

112
Innes J.L. (1985): An examination of some factors affecting the largest lichens on a substrate, Arctic and Alpine research, 17(1): 99-106

The ecological basis for using the mean of the five largest lichens in lichenometry has been examined by investigating the Rhizocarpon section Rhizocarpon species growing on gravestones in Highland Scotland. The ratio of the mean of the five largest thalli to the single largest thallus on a substrate provides an index of the lichen performance on each stone which can then be related to environmental and temporal factors. Ratios appear to be unaffected by substrate lithology and orientation. but respond … EN Read more... 

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