The term 'Satoyama' refers to traditional and unique secondary forests in Japan that occupy intermedi-ate zones between villages ('sato') and hills or mountains ('yama'). Satoyama landscapes help sustain ecosystem ser-vices and the diversity of secondary natural environments. As Japan relies more heavily on foreign timber imports, the traditional role of Satoyama in providing forest products has diminished, and this has led to their abandonment and poor management. The chemical behavior of cations, anions, and dissolved organic matter in throughfall and stemflow from one such threatened Satoyama system in central Japan was investigated. From autumn to winter, the atmospheric deposition of sulfates and nitrates was 2.5–6.0 times higher compared to the amounts in summer due to the intrusion of air masses from the Asian continent. The dissolved organic matter in the throughfall and stemflow was composed mainly of humic substances and protein derivatives. The deposi-tion fluxes of dissolved organic carbon from throughfall (7.31–10.1 g m -2 a -1 ) and stemflow (1.79–3.84 g m -2 a -1 ) in this study were within ranges seen in temperate forests in previous studies. The deposition flux of sulfates was low compared to that in other forest types because canopy inter-action was lower, suggesting higher canopy openness than in primary forests. If a shift from a mixed species Satoyama forest to a conifer-dominated forest occurs after the mass mortality of oak, the deposition flux of dissolved organic carbon and K + might decrease by 33％ and 62％, respec-tively, while NO 3 - might increase by 20％. In the near future, the degradation of Satoyama landscapes might change the levels of dissolved organic carbon and nitrogen loads, result-ing in imbalances in river-ocean linkages affecting forested catchments and aquatic ecosystems in Japan.

Satoshi Asaoka;Fuyuhiko Sumikawa;Yoshifumi Watanabe;Waqar Azeem Jadoon;Masaki Ohno;Nobumichi Shutoh;Yuki Wakamatsu;Lawrence M.Liao;Akane Kanazawa;Yuka Sato;Natsumi Fujiwara

Graduate School of Integrated Sciences for Life,Hiroshima University,1-4-4 Kagamiyama,Higashi-Hiroshima 739-8528,Japan;Research Center for Inland Seas,Kobe University,5-1-1 Fukaeminami,Higashinada,Kobe 658-0022,Japan;Naragakuen Senior High School,430 Yamada,Yamatokoriyama,Nara 639-1093,Japan;Department of Environmental Sciences,Faculty of Natural and Computational Sciences,Hazara University,Dhodia,Mansehra 21130,Khyber Pakhtunkhwa,Pakistan;Niigata University of Pharmacy and Applied Life Sciences,265-1 Higashijima,Akiha,Niigata 956-8603,Japan;Faculty of Science and Engineering,Kindai University,3-4-1 Kowakae,Higashi-Osaka,Osaka 577-8502,Japan;Department of Maritime Science and Technology,Japan Coast Guard Academy,5 Wakaba,Kure,Hiroshima 737-8512,Japan

林业研究（英文版）

[1]Satoshi Asaoka;Fuyuhiko Sumikawa;Yoshifumi Watanabe;Waqar Azeem Jadoon;Masaki Ohno;Nobumichi Shutoh;Yuki Wakamatsu;Lawrence M.Liao;Akane Kanazawa;Yuka Sato;Natsumi Fujiwara-.Throughfall and stemflow chemical dynamics of Satoyama, a traditional secondary forest system under threat in Japan)[J].林业研究（英文版）,2022(03):813-826

Throughfall,Satoyama,intermedi,sato,yama

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