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Seasonal changes in camera-based indices from an open canopy black spruce forest in Alaska, and comparison with indices from a closed canopy evergreen coniferous forest in Japan
https://nipr.repo.nii.ac.jp/records/10131
https://nipr.repo.nii.ac.jp/records/10131dd970d04-07ad-4557-953e-06dea7260b1b
Item type | 学術雑誌論文 / Journal Article(1) | |||||
---|---|---|---|---|---|---|
公開日 | 2014-10-16 | |||||
タイトル | ||||||
タイトル | Seasonal changes in camera-based indices from an open canopy black spruce forest in Alaska, and comparison with indices from a closed canopy evergreen coniferous forest in Japan | |||||
タイトル | ||||||
言語 | en | |||||
タイトル | Seasonal changes in camera-based indices from an open canopy black spruce forest in Alaska, and comparison with indices from a closed canopy evergreen coniferous forest in Japan | |||||
言語 | ||||||
言語 | eng | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | Evergreen coniferous forest | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | Gross primary productivity | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | Phenology | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | Red | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | Green | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | Blue | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | Evergreen coniferous forest | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | Gross primary productivity | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | Phenology | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | Red | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | Green | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | Blue | |||||
資源タイプ | ||||||
資源タイプ識別子 | http://purl.org/coar/resource_type/c_6501 | |||||
資源タイプ | journal article | |||||
アクセス権 | ||||||
アクセス権 | metadata only access | |||||
アクセス権URI | http://purl.org/coar/access_right/c_14cb | |||||
著者 |
Nagai, Shin
× Nagai, Shin× Nakai, Taro× Saitoh, Taku M.× Busey, Robert C.× Kobayashi, Hideki× Suzuki, Rikie× Muraoka, Hiroyuki× Kim, Yongwon× Nagai, Shin× Nakai, Taro× Saitoh, Taku M.× Busey, Robert C.× Kobayashi, Hideki× Suzuki, Rikie× Muraoka, Hiroyuki× Kim, Yongwon |
|||||
抄録 | ||||||
内容記述タイプ | Abstract | |||||
内容記述 | Evaluation of the carbon, water, and energy balances in evergreen coniferous forests requires accurate in situ and satellite data regarding their spatio-temporal dynamics. Daily digital camera images can be used to determine the relationships among phenology, gross primary productivity (GPP), and meteorological parameters, and to ground-truth satellite observations. In this study, we examine the relationship between seasonal variations in camera-based canopy surface indices and eddy-covariance-based GPP derived from field studies in an Alaskan open canopy black spruce forest and in a Japanese closed canopy cedar forest. The ratio of the green digital number to the total digital number, hue, and GPP showed a bell-shaped seasonal profile at both sites. Canopy surface images for the black spruce forest and cedar forest mainly detected seasonal changes in vegetation on the floor of the forest and in the tree canopy, respectively. In contrast, the seasonal cycles of the ratios of the red and blue digital numbers to the total digital numbers differed between the two sites, possibly due to differences in forest structure and leaf color. These results suggest that forest structural characteristics, such as canopy openness and seasonal forest-floor changes, should be considered during continuous observations of phenology in evergreen coniferous forests. | |||||
内容記述 | ||||||
内容記述タイプ | Other | |||||
内容記述 | 林冠が疎なアラスカと,林冠が閉じた日本の常緑針葉樹林を対象に,生物季節(フェノロジー)画像から抽出した指数と渦相関法観測に基づいた総生産量(GPP)の季節変化の対応関係を調査した.両森林ともに,フェノロジー画像から抽出した緑の成分や色相と,GPPはベル型の季節変化パターンを示した.フェノロジー画像は主に,アラスカでは林床の植生の,日本では林冠表面の季節変化を捉えた.一方,赤や青の成分の季節変化パターンには,生態系の構造や葉の色の違いに起因した差がみられた。これらの結果は、常緑針葉樹林の長期連続的なフェノロジー観測には、林冠の鬱閉の程度や、林床植生の季節変化等を考慮することの重要性を示唆した。 | |||||
書誌情報 |
Polar science en : Polar science 巻 7, 号 2, p. 125-135, 発行日 2013-06 |
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出版者 | ||||||
出版者 | 国立極地研究所 | |||||
ISSN | ||||||
収録物識別子タイプ | ISSN | |||||
収録物識別子 | 18739652 | |||||
書誌レコードID | ||||||
収録物識別子タイプ | NCID | |||||
収録物識別子 | AA12240481 | |||||
論文ID(NAID) | ||||||
識別子タイプ | NAID | |||||
関連識別子 | 110009579498 | |||||
DOI | ||||||
識別子タイプ | DOI | |||||
関連識別子 | http://doi.org/10.1016/j.polar.2012.12.001 | |||||
関連名称 | 10.1016/j.polar.2012.12.001 |