Silvicultural and Dendroclimatic Analysis of Artificial Pine Phytocenoses Exposed to Recreational Digression in a Suburban Area of Voronezh
| Autor: | Sergey M. Matveev, Alexey V. Mironenko, Darya A. Timashchuk |
|---|---|
| Jazyk: | English<br />Russian |
| Rok vydání: | 2015 |
| Předmět: | |
| Zdroj: | Журнал Сибирского федерального университета: Серия Биология, Vol 8, Iss 4, Pp 410-425 (2015) |
| Druh dokumentu: | article |
| ISSN: | 1997-1389 2313-5530 |
| Popis: | The paper presents the results of silvicultural research of phytocenosis components and dendrochronologocal and dendroclimatic analyses of radial growth of pine and limiting factors in 50-70 year old stands of Scots pine in different stages of recreational digression, which grow in a suburban area of Voronezh. Weighted average of the category of the state of the examined tree stands increases from I, 7 to III, 1 with increasing the stage of digression from I to IV. On III-IV and IV stages of digression tree stands are classified as “very weak.” With increasing recreational load the projective ground cover of herbaceous plants and their aboveground phytomass decreases, the share of participation and diversity varies (weeds and meadow grass appear). The tree stands which exposed to intensive recreational impact significantly more affected by drought in 2010. In 2012 – 2013 years the average radial growth of trees increased in stands which are in I and II stages of digression, while in stands belong to III and IV stages it continues to decline. So far, the desiccation of particular trees continues in all artificial pine stands regardless of the stage of digression. The coefficients of variation of growth sharply increase to a maximum value (> 60 %) in the years after the severe drought, and after two-year especially severe drought (1971-1972 and 2009-2010) the increase of the coefficient of variation is also observed during two or even three years (1973–1974 and 2011-2013). It is clear that Stage IV of the digression is a transition of the tree stand to irreversible phase of deterioration |
| Databáze: | Directory of Open Access Journals |
| Externí odkaz: |
|