environmental flow assessments in estuaries related to preference of phytoplankton
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ID: 250049
2014
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Abstract
An approach to assess estuarine environmental flow based on
phytoplankton preference, including the complex relationships between
hydrological modifications and ecosystem biomass, was developed in this
study. We initially established a relationship between biomass requirements
for primary and higher nutritional level organisms based on the ecosystem
nutritional energy flow principles. Subsequently, diagnostic pigments were
employed to represent phytoplankton community biomass, which indicated
competition between two groups of phytoplankton in the biochemistry process.
Considering empirical relationships between diagnostic pigments and critical
environmental factors, biomass responses to river discharge were established
by simulating distributions of critical environmental factors under action
of river discharges and tide currents. Consequently, environmental flows
were recommended for different fish biomass requirements. We used the Yellow
River estuary as a case study; and May and June were identified as critical
months for maintaining environmental flow. Temporal variation in natural
river flow dynamics, which was used as a proxy for environmental flow,
should be carefully examined in artificial hydrological regulation
strategies, particularly during high-amplitude flood pulses, which might
result in negative effects on phytoplankton groups, and subsequently higher
aquatic species biomass.
| Reference Key |
yang2014hydrologyenvironmental
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|---|---|
| Authors | ;Z. F. Yang;T. Sun;R. Zhao |
| Journal | materials research bulletin |
| Year | 2014 |
| DOI |
10.5194/hess-18-1785-2014
|
| URL | |
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