Increase in stream water nitrate nitrogen concentrations caused by a disturbance to a forested catchment by Japanese oak wilt
| Autor: | Mie Gomyo, Nobuaki Tanaka, Naohiro Imamura |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
0106 biological sciences
Japanese-oak Canopy geography geography.geographical_feature_category Disturbance (geology) 010504 meteorology & atmospheric sciences biology Ecology Drainage basin Forestry Quercus serrata biology.organism_classification 01 natural sciences Basal area Animal science Nitrate nitrogen Environmental science Secondary forest 010606 plant biology & botany 0105 earth and related environmental sciences |
| Zdroj: | Journal of Forest Research. :1-6 |
| ISSN: | 1610-7403 1341-6979 |
| DOI: | 10.1080/13416979.2017.1325057 |
| Popis: | In recent years, Japanese oak wilt (JOW) has become prevalent in Japan and has spread into almost all prefectures. To understand the effects of a JOW disturbance on nitrate nitrogen (NO3–) concentrations in a forest stream, we analyzed the changes in NO3– concentrations over a period of 7 years in a mixed broadleaved-conifer secondary forest in Japan. The JOW disturbance arose in the fifth year and lasted until the seventh year of the study period, resulting in a 4.7%, 3.0%, and 2.5% loss in the total basal area of the forest in the fifth, sixth, and seventh years, respectively, eventually resulting in an estimated canopy cover loss of 9.7%. The mean NO3– concentration after the appearance of JOW (3.99 μmol L–1) was significantly higher than before the start of the disturbance (1.99 μmol L–1). This study demonstrated that even the modest canopy cover loss by JOW-induced dieback of Quercus serrata trees could cause an increase in stream water NO3– concentration. |
| Databáze: | OpenAIRE |
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