Assessment of the water quality factors influencing the primary production in Lake Kasumigaura
-
- KOMATSU Kazuhiro
- 国立環境研究所 地域環境研究センター
-
- NAKAGAWA Megumi
- 国立環境研究所 生物・生態系環境研究センター
-
- TSUCHIYA Kenji
- 国立環境研究所 地域環境研究センター
-
- KOHZU Ayato
- 国立環境研究所 地域環境研究センター
-
- SHINOHARA Ryuichiro
- 国立環境研究所 地域環境研究センター
-
- MATSUZAKI Shin-ichiro S.
- 国立環境研究所 生物・生態系環境研究センター
Bibliographic Information
- Other Title
-
- 霞ヶ浦における一次生産量に影響を及ぼす水質環境因子の解析
- カスミガウラ ニ オケル イチジ セイサンリョウ ニ エイキョウ オ オヨボス スイシツ カンキョウ インシ ノ カイセキ
Search this article
Description
<p> Fast Repetition Rate Fluorometry (FRRF) is one of the methods for quantifying primary production in aquatic environment, and it has the advantages in terms of quick measurement and being able to obtain the large amounts of data. In this study, FRRF has been applied to monitor the primary production from 2016 to 2019 in Lake Kasumigaura. Algal abundance and photosynthetic activity are assumed to be the factors affecting primary production. In Lake Kasumigaura, it was shown that primary production and the algal abundance had the causal relationship with the annual variation of strength. On the other hands, correlation analysis revealed that the extinction coefficient of light under the water (Kd) have much influenced on the photosynthetic activity in the lake. Furthermore, especially near the estuary, it was found that nitrate from the inflowing rivers during the rainfall events also affect the photosynthetic activity.</p>
Journal
-
- Journal of Japan Society of Civil Engineers, Ser. G (Environmental Research)
-
Journal of Japan Society of Civil Engineers, Ser. G (Environmental Research) 76 (7), III_11-III_17, 2020
Japan Society of Civil Engineers
