Oak Tree Canker Disease Supports Arthropod Diversity in a Natural Ecosystem

다국어 초록 (Multilingual Abstract)

Microorganisms have many roles in nature. They mayact as decomposers that obtain nutrients from deadmaterials, while some are pathogens that cause diseasesin animals, insects, and plants. Some are symbionts thatenhance plant growth, such as arbuscular mycorrhizaeand nitrogen fixation bacteria. However, roles of plantpathogens and diseases in natural ecosystems are stillpoorly understood. Thus, the current study addressed thisdeficiency by investigating possible roles of plant diseasesin natural ecosystems, particularly, their positive effectson arthropod diversity. In this study, the model systemwas the oak tree (Quercus spp.) and the canker diseasecaused by Annulohypoxylon truncatum, and its effectson arthropod diversity. The oak tree site contained 44oak trees; 31 had canker disease symptoms while 13were disease-free. A total of 370 individual arthropodswere detected at the site during the survey period.
The arthropods belonged to 25 species, 17 families,and seven orders. Interestingly, the cankered treeshad significantly higher biodiversity and richnesscompared with the canker-free trees. This study clearlydemonstrated that arthropod diversity was supportedby the oak tree canker disease.

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