scholarly journals Growth dynamics analysis of the acrocarpous moss Dicranum polysetum Sw. in artificial pine forests of the steppe zone

2019 ◽  
Vol 8 (4) ◽  
pp. 18-23
Author(s):  
Yana Andreevna Bogdanova ◽  
Evgeny Sergeevich Korchikov

The paper discusses the growth dynamics of Dicranum polysetum Sw. in artificial pine communities of the Krasnosamarsky Forest (Samara Region) and the National Park Buzuluksky Bor (Samara and Orenburg Regions). These species are most commonly found in these types of communities. The authors note the vitality of Dicranum polysetum Sw. and its relation to the size of the moss curtain. The studies were conducted in the summers of 2015, 2016 and 2017. The moss was studied at 12 sites of the artificial pine forests of the Krasnosamarsky forest and the National Park Buzuluksky Bor. Three individuals were selected at each site, the growth and vitality of them were noted during the study period. It was revealed that the smallest growth was on the sites of the smallest moss curtain in both study areas. It was also found that the microrelief and grassy layer can significantly affect moss growth. It was noted that the vitality score was higher in large clumps in the absence of any mechanical damage to the curtain, and that the shoots form twigs, on average, every two years, thereby increasing their biomass, because the area of curtains did not significantly change during the study period.

Forests ◽  
2021 ◽  
Vol 13 (1) ◽  
pp. 2
Author(s):  
Sholpan Zhumadina ◽  
Jiri Chlachula ◽  
Alina Zhaglovskaya-Faurat ◽  
Jolanta Czerniawska ◽  
Gulmira Satybaldieva ◽  
...  

The ribbon-like pine forests of North Kazakhstan represent the principal territorial intrazonal and azonal biotopes. Integrated bio-geographic studies of the pine forests’ status were performed in the Beskaragai and Chaldai Nature Reserves in the Pri-Irtysh River basin within, at present, the climate–change most susceptible transitional parkland-steppe zone of Central Asia, adjoining the West Siberian Lowland. The investigations followed the regional topographic gradient with a series of mapped sites characterizing the spatial relief patterns of the pristine forest distribution and the associated phytocenoses. The results revealed marked natural arboreal cover restoration differences between the geographically close upland and lowland forest ecosystems. The regional tree growth dynamics show the varying intensity of the pine seedlings’ succession, the tree stands’ biomass productivity and the environmental stability, weakened by the extreme continentality and progressing aridification along with adverse anthropogenic ecological impacts. The specific geomorphic, soil and hydrological conditions are the principal determining factors. The more vital plain and lowland pine forests host the floristically richer fescue-dominated communities compared to the more fragile and precipitation-poorer upland pine settings. The latter forest ecosystems display a higher vulnerability to the current climate change, generating tree drying, forest fires, and to modern human activities such as logging, herding and recreation. The research conclusions provide new insights on the natural ribbon-like pine forests’ sustainability and adaptation to the ongoing continental warming triggering fundamental environmental transformations in Central Asia’s parklands.


Data in Brief ◽  
2021 ◽  
Vol 34 ◽  
pp. 106617
Author(s):  
Nicola Puletti ◽  
Mirko Grotti ◽  
Carlotta Ferrara ◽  
Stefano Scalercio

Author(s):  
V. P. Tkach ◽  
O. V. Kobets ◽  
M. G. Rumiantsev

The forest site capacity using was quantitatively assessed for the stands of the main forest-forming species of Ukraine, Scots pine and common oak, taking into account natural zones and forest types. The tables of productivity of modal and highly productive pine and oak stands have been developed. It has been found that the stands use an average of 50–75 % of the forest site capacity of lands. The average weighted value of the capacity used by pine forests was 68–76 % in the Polissya zone, 70–78 % and 68–73 % in the Right-bank and Left-bank Forest-Steppe zones respectively, and 54–78 % in the Steppe zone. For oak stands, the value was 71–75 % and 63–71 % for the Right-bank and Left-bank Forest-Steppe zones respectively and 65–75 % for the Steppe zone. The basis for increasing the productivity of forests was confirmed to be the differentiation of forest management systems and individual forestry activities on a zonal and typological basis.


1984 ◽  
Vol 62 (5) ◽  
pp. 893-898 ◽  
Author(s):  
Ola Engelmark

The occurrence of forest fires in the Muddus National Park (area, 50 000 ha), just north of the Arctic Circle in northern Sweden, was investigated on 75 separate sample plots. Between 1413 and the present, evidence of 47 fire years was obtained by dating the fire scars on living Scots pines (Pinus sylvestris), the oldest of which had germinated in 1274. The fire traces found on the sample plots were fire scars on living or dead trees or charcoal fragments in the humus layer. Plots lacking all traces of former forest fires were mainly those situated on sites surrounded by extensive mires. Forest fires were shown to have occurred in the five different types of forest investigated. The commonest frequencies of fires in the pine forests occurred with the interval 81–90 years, while the mean frequency was 110 years. The mean interval of time elapsed since the last forest fire occurred in the pine forests was 144 years. Some of the major fire years in the Muddus area coincide with forest fires in other parts of northern Sweden, in the taiga of western Russia, and in central Siberia.


2020 ◽  
Vol 22 ◽  
pp. e01017
Author(s):  
Michał H. Węgrzyn ◽  
Joanna Kołodziejczyk ◽  
Patrycja Fałowska ◽  
Piotr Wężyk ◽  
Karolina Zięba-Kulawik ◽  
...  

1990 ◽  
Vol 20 (2) ◽  
pp. 193-199 ◽  
Author(s):  
K. L. Taylor ◽  
R. W. Fonda

The fuel structure and flammability of subalpine fir (Abieslasiocarpa (Hook.) Nutt.) stands were studied to determine the relationship between these forests and fire. It has long been known that subalpine fir forests burn catastrophically, but the contributions of fuel structure and fuel moisture to this pattern of burning have been relatively unstudied. This investigation discovered two relationships. First, over twice as much fuel in subalpine fir forests accumulated around the bases of the fir trees than in the forest as a whole, and the many dead branches on the lower trunks may allow fire to travel up into the canopy. Second, the fuels in subalpine fir forests were more flammable at the end of the summer than at the beginning, and maximum flammability was achieved in early August when the fuel moisture was between 16 and 22%. We also found that the fuel structure of subalpine fir was different from that of fire-stable ponderosa pine (Pinusponderosa Laws.) forests. The fuel around the bases of the trees in ponderosa pine forests was not significantly different from that in the entire forest, and there were few branches on the lower trunks.


Author(s):  
Ksenia A. Alekseeva ◽  
◽  
Oleg G. Zotov ◽  

The national Park “Samarskaya Luka” and the adjacent “Zhigulevsky state reserve of I. I. Sprygin” is a special territory that includes a variety of natural monuments, natural landscapes, unique flora and fauna for the forest-steppe zone. In this regard, this area opens up a wide potential for tourism, which is actively implemented by the management of the national Park. The purpose of this article is to show the prospects of studying this territory in the framework of a school geography course, conducting field trips along pre – developed routes on the territory of this protected area.


Author(s):  
Stephen Barrett ◽  
Stephen Arno

This study's goal is to document the fire history of the Lamar River drainage, southeast of Soda Butte Creek in the Absaroka Mountains of northeastern Yellowstone National Park (YNP). Elsewhere in YNP investigators have documented very long-interval fire regimes for lodgepole pine forests occurring on rhyolitic derived soils (Romme 1982, Romme and Despain 1989) and short-interval fire regimes for the Douglas-fir/grassland types (Houston 1973). No fire regime information was available for lodgepole pine forests on andesitic derived soils, such as in the Lamar drainage. This study will provide managers with a more complete understanding of YNP natural fire history, and the data will supplement the park's Geographic Information System (GIS) data base. Moreover, most of the study area was severely burned in 1988 and historical tree ring data soon will be lost to attrition of potential sample trees.


Sign in / Sign up

Export Citation Format

Share Document