Changes in nutrient ratios and phytoplankton community structure caused by hydropower development in the Maotiao River, China.
Environ Geochem Health
; 36(3): 595-603, 2014 Jun.
Article
em En
| MEDLINE
| ID: mdl-24213704
ABSTRACT
Reservoirs created for hydropower production have become an important feature impacting a river. Understanding the effects of river impoundment on the downstream environment is critical to decision-making for water resource protection. The changes caused by impoundment are changes in water quality and the resulting effect on the phytoplankton community structure. The impacts caused by a series of reservoirs along a river are still not well understood. In this study, we conducted an investigation of five reservoirs along the Maotiao River, China. We found that a series of impoundments plays a role in decreasing the phytoplankton biomass in downstream reservoirs. Within the studied area, nitrogen is not a limiting factor for phytoplankton growth. The ratio of silicon to phosphorus (SiP) can become a major factor in the regulation of phytoplankton community structure. The SiP ratio increased from upstream to downstream reservoirs, causing a concurrent increase in the percentage of Bacillariophyta, particularly during the winter. In addition, our results indicate that the creation of dams eliminates Si limitation downstream.
Texto completo:
1
Base de dados:
MEDLINE
Assunto principal:
Fitoplâncton
/
Fontes de Energia Elétrica
/
Rios
Tipo de estudo:
Prognostic_studies
País/Região como assunto:
Asia
Idioma:
En
Revista:
Environ Geochem Health
Assunto da revista:
QUIMICA
/
SAUDE AMBIENTAL
Ano de publicação:
2014
Tipo de documento:
Article