Katalog - Lichenological literature

17206

Arseneault D. & Payette S. (1992): A postfire shift from lichen-spruce to lichen-tundra vegetation at tree line, Ecology, 73(3): 1067-1081

The environmental changes associated with a fire-induced shift from old- growth lichen-spruce krummholz to lichen-tundra vegetation have been evaluated at a tree line site in northern Québec. Tree ring and growth form patterns of black spruce (Picea mariana) remains lying on the ground in a lichen-tundra community were used to recon- struct, within a 4600-M2 quadrat, the structure of a conifer stand at the time of the burn (-AD 1750). The prefire spruces were the last members of a long regenerative … Read more...

12957

Arseneau M.-J., Ouellet J.-P. & Sirois L. (1998): Fruticose arboreal lichen biomass accumulation in an old-growth balsam fir forest, Canadian Journal of Botany, 76(10): 1669-1676

The standing biomass accumulation of lichens from the genera Alectoria, Bryoria, and Usnea was studied along two environmental gradients, altitude and height along the vertical tree axis, in an old-growth balsam fir (Abies balsamea (L.) Mill.) forest. Lichens were sampled from 50 trees in five sampling sites at an altitude of 720-1068 m as1 and encompassing three vegetation belts (mountain. subalpine, and alpine). The lichen biomass accumulation rate was studied at branch and tree levels. The Golnpertz … Read more...

26854

Arsenault A. & Goward T. (2016): Macrolichen diversity as an indicator of stand age and ecosystem resilience along a precipitation gradient in humid forests of inland British Columbia, Canada, Ecological Indicators, 69: 730–738

The distributional ecology of 87 macrolichens is reported from 14 unmanaged mid-seral and old for-est stands along a precipitation gradient in south-central British Columbia. We used a combination ofunivariate and multivariate statistics to investigate the role of forest structure and stand age in the distri-bution of epiphytic macrolichens in interior cedar-hemlock forests. Old forests support a higher numberof species; although mean species richness is not significantly different between the two … Read more...

21726

Arsenault A. & Goward T. (2000): Ecological Characteristics of Inland Rain Forests, In: Darling L.M. (ed.), Proceedings of a Conference on the Biology and Management of Species and Habitats at Risk, Kamloops, B.C., 15-19 Feb.,1999, p. 437-439, B.C. Ministry of Envir., Lands and Parks, Victoria & Univ. Coll. Cariboo, Kamloops, B.C.

Within the northern hemisphere a major proportion of the world’s rain forests at temperate latitudes occur along the west coast of North America. Fronting the Pacific Ocean, and centred in British Columbia at 43°N to 61°N, these coastal rainforests have long provided an international flashpoint for environmental concern. By contrast, their inland counterparts – the rain forests of intermontane British Columbia – are still poorly known, even to researchers. Located between 51°N and 54°N … Read more...

21727

Arsenault A. & Goward T. (2000): The drip zone effect: new insights into the distribution of rare lichens, In: Darling L.M. (ed.), Proceedings of a Conference on the Biology and Management of Species and Habitats at Risk, Kamloops, B.C., 15-19 Feb.,1999, p. 767-768, B.C. Ministry of Envir., Lands and Parks, Victoria & Univ. Coll. Cariboo, Kamloops, B.C.

Nearly half of British Columbia’s rare tree-dwelling macrolichens have cyanobacterium as photobiont. Such species can be referred to as epiphytic cyanolichens. As a group, epiphytic cyanolichens have a requirement for nutrient- rich substrates with a pH above about 5.0; they tend to be absent from acidic substrates, including the bark of conifers. Viewed from this perspective, the copious presence of cyanolichens over the bark of pines, spruces, hemlocks, and other members of the Pinaceae in … Read more...

15367

Arroyo R., Seriñá E. & Manrique E. (1991): Estudio químico y morfológico de Ramalina polymorpha Grex en España, Acta Botánica Malacitana, 16(1): 165-174

The identification of members of the Ramalina polymorpha grex is often complicated by the considerable morphological variation and intergradation of the characters within the group. Based on a broad chemical and morphological study of this group and its ecology and distribution, we recognize two distinct taxa: Ramalina polymorpha (Ach.) Ach. and Ramalina capacita (Ach.) Nyl., the latter including the rest of the morphological variations encountered on the Iberian Peninsula, wich are treated … Read more...

22477

Arroyo R., Seriñá E. & Araujo E. (2011): Ramalina carminae (Ascomycota: Ramalinaceae), a new species from Europe, Botanica Complutensis, 35: 5-14

Ramalina carminae is described as new to science. The new species is found in several localities in Portugal and Spain and in one locality in Sardinia (Italy). It is characterized by a fruticose thallus with profuse soralia, irregular shape, twisted branches and by the presence of variolaric acid as the only compound in the medulla. Key words: Iberian Peninsula, new species, Ramalina, taxonomy, secondary chemistry, variolaric acid. Read more...

9049

Arroyo Cabeza R. & Manrique Reol E. (1988): Estudios químicos en Ramalina farinacea (L.) Ach. del centro de España, Anales del Jardín Botánico de Madrid, 45(1): 53-59

Key words: Ramalina, lichens, chemotaxonomy, Madrid, Spain. Read more...

9050

Arroyo Cabeza R. & Manrique Reol E. (1989): Estudios químicos del género Ramalina Ach. en el centro de la Península Ibérica, Anales del Jardín Botánico de Madrid, 46(1): 307-315

Key words: Lichens, Ramalina, chemotaxonomy, Spain. Read more...

24326

Arróniz-Crespo M., Perez-Órtega S., De los Ríos A., Green T.G.A., Ochoa-Hueso R., Casermeiro M.Á., de la Cruz M.T., Pintado A., Palacios D., Rozzi R., Tysklind N. & Sancho L.G. (2014): Bryophyte-cyanobacteria associations during primary succession in recently deglaciated areas of Tierra del Fuego (Chile), PLoS ONE, 9(5): e96081 [14 p.]

Bryophyte establishment represents a positive feedback process that enhances soil development in newly exposed terrain. Further, biological nitrogen (N) fixation by cyanobacteria in association with mosses can be an important supply of N to terrestrial ecosystems, however the role of these associations during post-glacial primary succession is not yet fully understood. Here, we analyzed chronosequences in front of two receding glaciers with contrasting climatic conditions (wetter vs drier) at Cordillera … Read more...