Pinus contorta (lodgepole pine).

P. contorta is a fast-growing, short-lived and fire-adapted two-needled pine species with a very wide ecological amplitude and tolerance. It is an important and valuable timber trees in western North America, with forests dominated by P. contorta covering some 6 million ha in the USA and 20 million ha in Canada (Burns and Honkala, 1990). Because of its rapid growth rate, small taper and thin bark, it produces a higher volume of wood than many of its associates of the same diameter and height. It is a low nutrient-demanding species and easy to regenerate and grow. A common problem of regenerating P. contorta is overstocking which may result in growth stagnation during early stand development on water-deficient, nutrient-poor sites.

Ecological And Cenotic Analysis Of Wild Relatives Of Cultivated Plants Of The Republic Of Karakalpakstan And Khorezm

The results of ecological and cenotic analysis of wild relatives of cultivated plants (DRC) of the Republic of Karakalpakstan and Khorezm are presented. Based on the classification of P. V. Kulikov (2005), a system was developed, where 8 ecologo-cenotic groups of DSCS were identified, and the resulting groups were divided into 16 subgroups. Ecological-cenotic analysis showed that the DSCS of the Republic of Karakalpakstan and Khorezm are mainly plants of deserts and meadows (58.5%). However, a significant share (19.9%) is made up of species with a narrow ecological amplitude, confined to specific habitats: saline soils and coastal (coastal and coastal-meadow). Desert-tope species are among the most vulnerable, 12 of which need to be preserved also because 3 of them are endemic and one is a relict species, which, due to their adaptation to extreme environmental conditions, can contain valuable genetic information.

Assessment of the state of coenopopulations Neottianthe cucullata (L.) Schlechter in the Kasmalinsky stripe pine forest (Altai Krai)

The impact of environmental factors on the demographic characteristics of coenopopulations of Neottianthecucullata (L.) Schlechter growing on the territory of the Kasmalinsky stripe pine forest were estimated. Humidity andlight exposure are factors that have the greatest impact on the state of the population. High humidity during the growingseason has an adverse effect, the number of individuals is reduced. Neottianthe cucullata does not tolerate either fulllighting or complete shading. In general, the species has a wide ecological amplitude.

Endolichenic fungal diversity associated with some lichens of the Western Ghats

A total of 389 strains of fungi belonging to 38 species were isolated from 10 lichen species of the Western Ghats, southern India. All the lichens screened, irrespective of their growth forms or location, harboured endolichenic fungi. Most of the fungi belonged to the Ascomycotina. Chaetomium sp. 1, Hypoxylon investiens, Nemania bipapillata, Nodulisporium sp., Paecilomyces sp., and Sporormiella intermedia were the most common ones and were present in 5 or more lichen species. Of the 28 sporulating fungi, 7 belonged to Xylariales, and their total colonization frequency in all the lichens was also high. This observation further substantiates the high ecological amplitude of Xylariales, possibly due to overlapping ecological niches and their ability to inhibit co-occurring endolichenic fungi.

Tamaricion dalmaticae, a new alliance from the eastern Adriatic

The paper describes the Tamaricion dalmaticae alliance and the Tamaricetum dalmaticae association, a new syntaxa localized under the saline or sub-halophilous conditions within the thermo-mediterranean and meso-mediterranean belts of the eastern Adriatic coast. The Tamaricion dalmaticae alliance is considered analogous to the Western Mediterranean Tamaricion africanae. The Tamaricetum dalmaticae association shows the high ecological amplitude of in terms of moisture. It develops on sandy soils only periodically inundated with sea or brackish waters, as well as on non-flooded areas in south Croatia, Montenegro and NW Albania. In Croatia, Tamaricetum dalmaticae has connections with the halophyte communities of the Sarcocornietea fruticosae and Ammophiletea classes, and the xerophilous ruderal communities of the Artemisietea vulgaris class. The habitats are exposed to disturbances and fragmentation.