国立研究開発法人 国際農林水産業研究センター | JIRCAS

Nitrogen Fixation Activity by Periphytic Blue-Green Algae in a Seagrass Bed on the Great Barrier Reef

JARQ : Japan Agricultural Research Quarterly
ISSN
00213551
書誌レコードID(総合目録DB)
AA0068709X
本文フルテキスト

Acetylene reduction activity, an index of nitrogen fixation, by epiphytic and epibenthic algae and coral debris was measured in seagrass beds around Green Island, Australia. Epiphytic blue-green algae showed a high activity, ranging from 56.1 ± 31.9 to 729 ± 105 mmol (g chl a) -1 d-1 on a chlorophyll basis, or 3.9 μmol N2 m-2 d-1 to 16 mmol N2 m-2 d-1 on an areal basis. The activities on an areal basis were comparable to those reported in a Fijian seagrass bed, whereas activities on a chlorophyll basis were higher on Green Island than on Fiji. A relatively high activity was observed on the leeward side of the island, partly due to the high seagrass biomass and partly due to the high epiphyte biomass. This trend of high activity on the leeward side of the island suggested that the biomass and/or activity of nitrogen fixing blue-green algae could be affected by unknown mechanism (s) related to the island environment. Algae on (or in) coral debris, which were abundant around live corals, were able to reduce acetylene.

刊行年月2000-01-01
作成者Hitoshi IIZUMI Masumi YAMAMURO
データ作成日2000-01-01
国立情報学研究所メタデータ主題語彙集(資源タイプ)Journal Article
34
1
開始ページ69
終了ページ73
言語eng