Impacts Of The Invasive FourEyed Fir Bark Beetle (Polygraphus Proximus Blandf.) On Siberian Fir (Abies Sibirica Ledeb.) Forests In Southern Siberia
| Autor: | Aleksey A. Aleinikov, Anatoly Yu. Bocharov, Nina V. Klimova, Nikita Debkov, Gennady I. Pudzha, Alexander Gradel |
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| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
0106 biological sciences
Bark beetle 010504 meteorology & atmospheric sciences Geography Planning and Development taiga ecosystems Environmental Science (miscellaneous) Biology medicine.disease_cause 010603 evolutionary biology 01 natural sciences Invasive species Infestation medicine stand structure resilience 0105 earth and related environmental sciences natural regeneration Geography (General) Ecology Heart rot 15. Life on land Abies sibirica stability biology.organism_classification invasion Disturbance (ecology) visual_art visual_art.visual_art_medium G1-922 Bark Tree health |
| Zdroj: | Geography, Environment, Sustainability, Vol 12, Iss 3, Pp 79-97 (2019) |
| ISSN: | 2542-1565 2071-9388 |
| Popis: | The emergence and spread of non-native invasive forest insects represent a major potential threat to global biodiversity. The present study examines the current invasion of the far eastern four-eyed fir bark beetle Polygraphus proximus Blandf. in southern Siberian fir (Abies sibirica Ledeb.) forests. We collected data on 38 large sized (2500 m²) sample plots, situated in fir forests of the Tomsk region. As a direct result of the four-eyed fir bark beetle infestation, stand density decreased by 34-37%, and stand volume by 30%. The mean height, individual age and diameter at the stand level consequently increased. Our results indicated that stands with complete left-sided or normal ontogenetic structure (composed primarily of late virginal firs or firs in young reproductive stage) are more resistant to invasion by the four-eyed fir bark beetle. By contrast, fir forests characterized by more right-sided ontogenetic structure (composed primarily of mature and old reproductive firs), exhibited the least resistance and, with rare exception, degraded rapidly in response to the invasion. Our results also pointed to a mechanism that initiates invasions of the four-eyed fir bark beetle in fir stands of all types of ontogenetic structure, which is the attack of virginal trees and trees in early reproductive stages. Trees up to average diameter are the most susceptible to invasions of the bark beetle. We identified thicker bark, larger DBH and low occurrence of heart rot as the most important parameters for indicating resistance at the single tree level. DBH and bark thickness (p |
| Databáze: | OpenAIRE |
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