Page 3573 of 3770 Results 35721 - 35730 of 37696
Id/Author/Year/TitleOrder by:  Year  Id  Author  Title
26024
Yagüe E. & Estévez M.P. (1989): Variation in the cellulase system enzymatic activities from the lichen Evernia prunastri , Fyton, 50(1/2): 119-124

Variations in the cellulase system, ß-l,4-glucanase, and ß~glucosidase activities- from Evernia prunastri (L.) Ach. collected from two different stands during a two-year period are reported. Because it is difficult to assume a seasonal behaviour for such variations, they could be explained as a result of the genetic variability of samples EN Read more... 

27647
Yagüe E. & Pilar Estévez M. (1988): Regulation of ß-1,4-Glucanase and ß-Glucosidase Production by Glucose in Evernia prunastri, Journal of Plant Physiology, 133: 539-544

Glucose induced de novo synthesis of ß-l,4-glucanase and ß-glucosidase in Evernia prunastri. This effect changed when glucose accumulated in the thallus, where the production of both enzymes was repressed. While the secretion of ß-l,4-glucanase was increased by glucose, ß-glucosidase only appeared in the incubation medium, directly dependent on the glucose concentration. These results are compared with others from cellulolytic organisms. Several functions of cellulase in E. prunastri are discussed. … EN Read more... 

25682
Yahr R. (2015): The status of the conservation priority species Calicium corynellum in the British Isles, Lichenologist, 47(4): 205–214

Conservation organisations are tasked with protection of biodiversity but are challenged by limited resources; consequently, the highest conservation priority species have designations that should correspond with the level of protection needed. In Britain, the saxicolous Calicium corynellum receives the highest conservation priority as a consequence of its rarity, combined with dramatic population declines over the last several decades, having disappeared from 2 of its 4 British sites and declined … EN Read more... 

24114
Yahr R. (2014): A Festschrift in honor of Martin Jahns. Kärnefelt, I., M. R. D. Seaward & A. Thell (eds.). 2012. Systematics, biodiversity and ecology of lichens. Bibliotheca Lichenologica, Band 108. 290 pp., with 72 figures and 12 tables. J. Cramer, Berlin, Stuttgart, Germany. [ISBN 978-3-443-58087-2; ISSN 1436-1698 (Series)]. Price €87.00 + shipping and postage (softcover). Available from: http://www.schweizer, Bryologist, 117(1): 90-91

Book review EN Read more... 

7456
Yahr R. (2007): Review: A new look at Australian graphids, Bryologist, 110(3): 561-562

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37506
Yahr R., Allen J.L., Atienza V., Burgartz F., Chrismas N., Dal Forno M., Degtjarenko P., Ohmura Y., Pérez-Ortega S., Randlane T., Reese Næsborg R., Simijaca-Salcedo D., von Hirschheydt G., Anderson F., Aptroot A., Balderas E., Borukhiyah N., Chandler A.M., Chesa Marro M., Divakar P.K., García R.A., Herrera-Campos M.d.l.Á., Howe N., Joseph S., Larsen E.M., Lendemer J.C., McMullin R.T., Michlig A., Moncada B., Paulsen J., Roa-García F., Rosentreter R., Scheidegger C., Sparrius L.B. & Stone D.F. (2024): Red Listing lichenized fungi: best practices and future prospects, The Lichenologist, 56(6): 345-362

According to International Union for the Conservation of Nature (IUCN) guidelines, all species must be assessed against all criteria during the Red Listing process. For organismal groups that are diverse and understudied, assessors face considerable challenges in assembling evidence due to difficulty in applying definitions of key terms used in the guidelines. Challenges also arise because of uncertainty in population sizes (Criteria A, C, D) and distributions (Criteria A2/3/4c, B). Lichens, which … URL EN Read more... 

24522
Yahr R., Coppins B. J. & Ellis C. J. (2014): Quantifying the loss of lichen epiphyte diversity from the pre-industrial Exmoor landscape (south-west England), Lichenologist, 46(5): 711–721

Across much of lowland Britain, lichen diversity has been dramatically affected by the Industrial Revolution, including the lasting legacy of pollution, and changes in land use including the loss, intensification, or abandonment of traditional woodland management. We sampled pre- served epiphytes on historical timbers in vernacular buildings to reconstruct pre-industrial lichen species occurrence for a site in Exmoor, south-west England, and used these data to quantify bio- diversity loss that appears … EN Read more... 

22736
Yahr R., Coppins B.J. & Coppins A.M. (2013): Transient populations in the British conservation priority lichen, Cladonia botrytes, Lichenologist, 45(2): 265–276

In the face of changing environments, conservation is tending towards an adaptive framework which accounts for the movement of species in the landscape. This makes it necessary to quantify population dynamics of species of concern. We studied the nationally scarce Cladonia botrytes, a priority Biodiversity Action Plan species in Britain, examining population dynamics at two scales: first, we studied the demography for two populations over a period of 13 years. The monitored populations declined to … EN Read more... 

19429
Yahr R., Coppins B.J. & Ellis C.J. (2011): Preserved epiphytes as an archaeological resource in pre-industrial vernacular buildings, Journal of Archaeological Science, 38: 1191-1198

The vernacular building tradition is an established source of information about historic woodlands and woodland management in Britain. We build on this resource by recognizing the information content derived from the tree-dwelling epiphyte communities of lichens and mosses, which are preserved on the bark of historic wooden building materials.We report on a first analysis of preserved epiphytes identified from six regions across lowland England. Seventy-eight vernacular buildings were surveyed … EN Read more... 

25873
Yahr R., Florence A., Škaloud P. & Voytsekhovich A. (2015): Molecular and morphological diversity in photobionts associated with Micarea s. str. (Lecanorales, Ascomycota), Lichenologist, 47(6): 403–414

Abstract: Lichenization is a symbiotic ecological strategy that is widely distributed among the fungi, but in which the diversity of partners is relatively poorly known. Limited morphological diversity has hindered the recognition of true diversity in many lichen fungi, and also in their algal partners. In the temperate and boreal zones, the crustose microlichens are the most speciose but arguably the least studied, particularly in terms of their photobiont partners. In this study, we sampled eight … EN Read more... 

Page 3573 of 3770 Results 35721 - 35730 of 37696