scholarly journals To the trends in the forest forming process in northeastern Moscow region

2015 ◽  
Vol 5 (3) ◽  
pp. 41-53
Author(s):  
Иванов ◽  
Sergey Ivanov ◽  
Коротков ◽  
Sergey Korotkov ◽  
Киселева ◽  
...  
Keyword(s):  
Species Composition ◽  
Case Studies ◽  
Bark Beetle ◽  
Moscow Region ◽  
Composition Change ◽  
Forming Process ◽  
Permanent Sample Plots ◽  
Spruce Decline ◽  
Tree Layer ◽  
Species Composition Change

Case studies of 75 permanent sample plots examine the directions of species composition change in different tree formations in case of normal evolution of biocoenoses and mass spruce decline. In case of natural development of forest biocoenoses, only on 5 plots of total 75 species composition of new tree generations is similar to that of the upper tree layer. On other 5 plots, the restoration of conditionally indigenous mixed spruce and lime forests proceeds. In all other cases, the forests develop towards the formation of broad-leaved communities with the predomination of lime. The expansion of maple in the undergrowth layer is observed on some plots. The change from spruce to lime forests is the most pronounced in the stands where the decline of spruce element occurred after bark beetle invasion.

scholarly journals Direct and indirect effects of nitrogen deposition on species composition change in calcareous grasslands

2010 ◽  
Vol 17 (5) ◽  
pp. 1871-1883 ◽  
Author(s):  
LEON J. L. VAN DEN BERG ◽  
PHILIPPINE VERGEER ◽  
TIM C. G. RICH ◽  
SIMON M. SMART ◽  
DAN GUEST ◽  
...  
Keyword(s):  
Species Composition ◽  
Nitrogen Deposition ◽  
Indirect Effects ◽  
Direct And Indirect Effects ◽  
Composition Change ◽  
Calcareous Grasslands ◽  
Species Composition Change

Оригинальное семеноводство овощных корнеплодных культур в Московской области

2018 ◽  
Author(s):  
A  Khovrin ◽  
M  Ibragimbekov ◽  
R  Bagrov
Keyword(s):  
Species Composition ◽  
Seed Production ◽  
Moscow Region ◽  
Seed Plants ◽  
Pests And Diseases ◽  
Root Crops ◽  
Seed Growing ◽  
In Cells

Даны результаты оригинального первичного семеноводства корнеплодных культур в изоляторах в селекционно-семеноводческом центре агрохолдинга «Поиск» (Раменский район Московской области). Описаны технологические особенности процесса семеноводства, представлен видовой состав болезней и вредителей семенных растений в условиях исследований.The results of the original primary seed growing of root crops in cells at breeding and seed production centre of Poisk Agro Holding (Ramensky district, Moscow region) are given. Technological peculiarities of the process of seed production, species composition of pests and diseases of seed plants in terms of research are presented.

scholarly journals Development and dynamics of mountain spruce (Picea abies [L.] Karsten) stand regeneration

2014 ◽  
Vol 60 (No. 2) ◽  
pp. 61-69 ◽  
Author(s):  
K. Malík ◽  
J. Remeš ◽  
S. Vacek ◽  
V. Štícha
Keyword(s):  
Picea Abies ◽  
Bark Beetle ◽  
Natural Regeneration ◽  
National Park ◽  
Height Growth ◽  
Seedling Height ◽  
Artificial Regeneration ◽  
Class Differences ◽  
The Past ◽  
Tree Layer

We summarized development and dynamics of natural regeneration in mountain spruce forests in areas affected by bark beetle gradation in the Šumava National Park. Detailed measurements of the regeneration were carried out using Field-Map technology (www.fieldmap.com) on ten permanent research plots. Research plots included the forests with decaying tree layer, stands in partial decline and stands with a generally healthy, or only partially damaged tree layer. Differences in rates of regeneration are very significant between the particular types of plots, especially in the youngest age class. Differences are also evident in the seedling height under varying treatments. The highest numbers of recruits (9,880 per ha) were found under intact overstorey canopies, while the fastest height growth occurred on clearcuts. This study also investigated and evaluated artificial regeneration done in the past.  

scholarly journals A Limited Rapid Assessment of Forest Regeneration in 24 Cypress and Tupelo Bottomland Swamps Following Clearcutting and Shovel Logging in the Coastal Plain of North Carolina

Forests ◽  
2020 ◽  
Vol 11 (8) ◽  
pp. 854
Author(s):  
James N. Slye ◽  
Albert J. Lang ◽  
Tom A. Gerow
Keyword(s):  
North Carolina ◽  
Species Composition ◽  
Coastal Plain ◽  
Forest Regeneration ◽  
Rapid Assessment ◽  
Seed Source ◽  
Timber Species ◽  
The North ◽  
Altered Hydrology ◽  
Species Composition Change

A rapid regeneration survey within twenty-four deepwater swamps between stand ages 2 and 14 years in the North Carolina coastal plain was conducted by using a narrow rectangular inventory technique (“strip cruise”). Inventoried tracts predominantly contained cypress (Taxodium distichum) and tupelo (Nyssa species) before being harvested via clearcutting methods. Single transects on each tract began at coordinates located in the interior of the harvest areas in locations representing general tract conditions. Each transect was perpendicular to the flow of the major stream drainage associated with the harvest area. Counts and measures of dead and live stumps and seed-sourced regeneration were recorded. About 52 percent of desirable timber species stumps tallied had coppice growth. However, coppice alone was not sufficient on any tract to exceed 1112 trees ha−1. Seventy-one percent of tracts had stocking levels (coppice and seed source) at least 1112 trees ha−1 of desirable timber species or black willow (Salix nigra). Across 24 tracts, 42 percent regenerated cypress and/or tupelo to levels exceeding 1112, trees ha−1. This assessment revealed that forest regeneration success was limited on sites with altered hydrology, rampant invasive species, and/or lack of seed source. In some cases, active forest management may improve the regeneration cohort. Overall, shovel logging methods that were used on evaluated sites appear to be compatible with adequate regeneration of desirable timber species if the proper conditions exist. Additionally, we assessed species’ composition within a harvested stand measured at age eight years (a previous study) and age 68 years (measured for this study), for a comparison perspective. Results revealed a species composition change from willow at age eight years to a mixed stand of desirable timber species at age 68 years. This finding supports other studies that have recorded the successional pattern of pioneering willow shifting to desirable timber species as willow stagnates and diminishes in abundance due to natural mortality.

Communities of oribatid mites (Acari: Oribatida) of naturally regenerating and salvage-logged montane spruce forests of Šumava Mountains

Biologia ◽  
2017 ◽  
Vol 72 (4) ◽  
Author(s):  
Petra Kokořovǎ ◽  
Josef Starý
Keyword(s):  
Species Composition ◽  
Community Composition ◽  
Bark Beetle ◽  
National Park ◽  
Management Strategies ◽  
Oribatid Mite ◽  
Control Area ◽  
Oribatid Mites ◽  
Spruce Forest ◽  
Spruce Forests

AbstractThe main aim of this study was to describe and compare communities of oribatid mites of selected areas in montane spruce forests near Březník in the Šumava National Park, where different management strategies were used after the spruce dieback caused by massive bark beetle gradation more than 15 years ago. Naturally regenerating and salvage-logged areas were compared. Significant differences were found in the oribatid mite community composition between differently managed areas. The oribatid mite community in naturally regenerating areas was in better shape and its abundance and species composition was similar to the community of a control area in a mature and healthy spruce forest.

scholarly journals Functional Composition Changes of a Subtropical Monsoon Evergreen Broad-Leaved Forest Under Environmental Change

Forests ◽  
2020 ◽  
Vol 11 (2) ◽  
pp. 191
Author(s):  
Shun Zou ◽  
Qianmei Zhang ◽  
Guoyi Zhou ◽  
Shizhong Liu ◽  
Guowei Chu ◽  
...  
Keyword(s):  
Hydraulic Conductivity ◽  
Drought Tolerance ◽  
Species Composition ◽  
Environmental Change ◽  
Subtropical Forest ◽  
Functional Composition ◽  
Composition Change ◽  
Environment Change ◽  
Soil Dryness ◽  
Composition Changes

Long-term studies have revealed that forest species composition was shifting under environment change and disturbance induced by loss of large trees. Yet, few studies explicitly analyzed their impacts on composition concurrently. To learn more about impacts of environment change and disturbance on driving forest community, we investigated shifts in functional composition over past 24 years in an old-growth subtropical forest in southern China. We analyzed nine traits that are mainly related to leaf nutrients, photosynthetic capacity, hydraulic conductivity, and drought tolerance of plants and examined hypotheses: (1) The functional composition change over time was directional instead of random fluctuation, (2) drought-tolerant species increased their abundance under soil dryness, (3) both environmental change and disturbance related to changes of functional composition significantly, and (4) initial trait values of quadrats strongly influenced their subsequent change rates in quadrat level (10 × 10 m). We found that species composition had shifted to favor species with high leaf nutrient content, high photosynthesis rate, high hydraulic conductivity, low water-use efficiency, and high drought tolerance traits, which was due to soil dryness and disturbance. These two factors explained 47–58% of quadrats’ trait value changes together. Considering rapidly increasing stem density, this pattern may indicate ecological processes of which disturbance provided numerous recruits of resource-acquisition strategy species and soil dryness conducted a selecting effect on shaping composition in the forest. Additionally, quadrats with initial trait values at the far end of change direction shifted faster in three traits, which also indicated that functional composition changes in quadrats were directional and homogenized. Our results implied that environment change and accompanied disturbance events possibly drove species composition change along a different trajectory in the subtropical forest that experienced high climatic variability.

TRANSFORMATION OF THE HERBACEOUS LAYER OVER 20 YEARS OF RESTORATION SUCCESSION IN BROAD-LEAVED FORESTS WITH LIANAS IN THE SOUTH OF PRIMORYE TERRITORY

2021 ◽  
Vol 69 ◽  
Author(s):  
Т.A. Moskalyuk ◽  
Keyword(s):  
Species Composition ◽  
Forest Ecosystems ◽  
Life Forms ◽  
Seasonal Development ◽  
General Description ◽  
The South ◽  
Herbaceous Layer ◽  
Forming Process

The structure of herbaceous layer in the conditionally-indigenous mixed broad-leaved type of forest with lianas and its change for 1998-2018 are analyzed. Research was carried out at the ecological profile "Gornotayozhniy" (Ussuriysky district, Primorye Territory). A general description of phytocoenoesis is given. Complexes of microgroups of the herbaceous layer, united by the similarity of species composition, life forms and seasonal development, have been identified and characterized. Cartographic schemes of the herbaceous layer with the placement of microgroups at the beginning of research and after 20 years were compiled. It has been established that in the structure of herbaceous layer of forest ecosystems the directions of regular changes caused by the course of the forest-forming process are clearly traced.

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