ВПЛИВ УМОВ СЕРЕДОВИЩА НА НАПРЯМ ПЕРВИННИХ СУКЦЕСІЙ В РАЙОНІ ВИХОДІВ ЛЕСОВИХ ПОРІД ПРАВОБЕРЕЖНОГО ПОЛІССЯ
Journal Title: Питання біоіндикації та екології - Year 2015, Vol 20, Issue 1
Abstract
Studying the dynamics of ecosystems needed for research, exploitation and protection of ecosystems. Creating a classification of ecosystems is impossible without considering their dynamic characteristics. We have a few approaches for the characterization of dynamics now. Some researchers give preference long-term observation. Other researchers are trying to develop a model of the dynamics of ecosystems based on a combination of fragments succession series. Both approaches have risks and difficulties. We used some fragments succession series, which are then combined into single line. We used standard geobotanical methods and phytoindication of environment. We characterize environmental factors 15 parameters by using the software package Simargl 1.12. We used the method of Braun Blanquet for the classification of plant communities. Our research showed that most of primary succession generated by human activities. The initial conditions of primary succession may determine the direction of plant communities. Edafotop susceptibility to transformation also affects the course of primary succession. Only lichens and algae occupy monolithic vertical crystalline rock. Higher plant communities cover horizontal section outputs loess rocks for 2-3 years. We found that the direction of primary succession affecting relief exposure, illumination and soil moisture. We found that the direction of primary succession affecting relief, exposure, light and soil moisture. Vertical, well lighted loess cliff remains without plants for a long time. Class plant communities Agropyretea intermedio-repensis Th.Müll et Görs 1969 occupy loess rocks with a smaller angle of slope. Most often there is vegetation associations Poo-Tussilaginetum farfarae R.Tx 1931 and Convolvulo-Agropyretum repentis Felföldy 1943. Grassland plant communities occupy the bottom of ravines for long time. Type of vegetation depends on the ratio between the depth of the ravine and width its bottom. Wide bottom of a shallow ravine occupied by class of plant communities Phragmiti-Magnocaricetea Klika in Klika et Novak 1941 (very moist soil) or class Molinio-Arrhenatheretea R.Tx 1937 (not moist soil). Such plant communities like Trifolio-Geranietea Th. Müll. 1962 and Galio-Urticetea Passrge et Kopecký 1969 occupy other types of ravines. Galio-Urticetea found in soils rich in nitrates and ammonium. The slopes of ravines passing through the grassland stage of succession quickly. The most common plant communities here is Epilobio-Salicetum capreae var Cystopteridetum fragilis. Its make up Salix caprea L., Cystopteris fragilis (L.) Bernh., Dryopteris filix-mas (L.) Schott, Corylus avellana L., Lonicera xylosteum L. and Populus tremula L. The sides of ravines occupied typical for this region boreal and Central European vegetation. Bifurcation of vector dynamics is affected by thresholds of environmental factors. The key factor affecting the succession is the mode of humidity content, available nitrogen and total salt regime. С помощью методов фитоиндикации определено влияние условий среды на направление первичной сукцессии в районе выходов лессовых пород Правобережного Полесья. На образование бифуркаций воздействуют определенные пороговые показатели факторов среды. Ведущими факторами, влияющими на направление сукцессии есть многолетний режим влажности грунта, содержание азотных соединений и общий солевой режим.
Authors and Affiliations
І. В. Хом’як Khomyak I. V.
Keywords
Related Articles
- EP ID EP317641
- DOI -
- Views 130
- Downloads 0
Магнітні властивості донних осадків як критерій оцінки техногенного впливу на гідроекосистеми
The existence of anthropogenic objects and phenomena in the biosphere, the analogues of which are not always to be found in nature is a reality nowadays. The instrument, by which humanity influences the processes occurri...
Порівняльні еколого-фізіологічні особливості чоловічої репродуктивної системи в умовах стресогенної напруги
The paper provided a brief description of environmental and physiological characteristics of the male reproductive system in times of stress exposure. Ecological, hygienic and cytochemical methods studied the impact of c...
Стійкість різних сортів Vіola × wittroсkiаna Gams. до стресових факторів
Viola × wittrockiana is an excellent plant for flower parterres, flower beds, spots on lawns, for a vase on the ground, for decorating balconies and for cutting. An interesting fact is the use of Vіola × wittroсkiаna flo...
Запас макроелементів та азоту в опаді й підстилці у протиерозійному насадженні сосни Палласової (Pinus pallasiana Lamb.)
The greatest mass of organic matter annually goes to litter fall in the valley line (9,91 kg/ha), lowest in the middle part of the slope (6,51 kg/ha) that is 66,08 % of this figure in the valley line. The mass of litter...
СЕЗОННА ДИНАМІКА ЧИСЕЛЬНОСТІ PELOBATES FUSCUS НА АРЕНІ Р. ДНІПРО (В МЕЖАХ ПРИРОДНОГО ЗАПОВІДНИКУ «ДНІПРОВСЬКО-ОРІЛЬСЬКИЙ»)
The aim of this study was to investigate the Pelobates fuscus seasonal population dynamics at the Dnieper river arena (within the Dniprovsko-Orilsky Nature Reserve). The study was conducted from April to November, 2015....