Impact of seasonality on the nutrient concentrations in Gautami-Godavari Estuarine Mangrove Complex, Andhra Pradesh, India
| Autor: | Namrata Priya, Karuna Rao, Al. Ramanathan |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Wet season
010504 meteorology & atmospheric sciences Dissolved silica Nitrogen India Wetland 010501 environmental sciences Aquatic Science Oceanography 01 natural sciences chemistry.chemical_compound Nutrient Rivers Nitrate Dry season Groundwater 0105 earth and related environmental sciences geography geography.geographical_feature_category Phosphorus Estuary Pollution chemistry Wetlands Environmental chemistry Environmental science Seasons Mangrove Estuaries Environmental Monitoring |
| Zdroj: | Marine Pollution Bulletin. 129:329-335 |
| ISSN: | 0025-326X |
| DOI: | 10.1016/j.marpolbul.2018.02.052 |
| Popis: | Spatiotemporal variations of dissolved nutrients were studied along Gautami-Godavari mangrove ecosystem to delineate their sources and fate. Average values of nitrate (NO3-), dissolved silica (DSi) and phosphate (PO43-) is 2.09 mg/l, 12.7 mg/l and 0.16 mg/l in wet season and 0.47 mg/l, 6.96 mg/l and 0.29 mg/l in dry season respectively. In wet season river discharge has significant influence on NO3- and DSi. In dry season, NO3- and PO43- are controlled by groundwater discharge, benthic exchange and various in situ processes owing to sediment redox condition. Mixing model shows net addition of phosphate in Coringa mangroves (95%) and Lower estuary (13%) and net removal of nitrate (24.79%) in Coringa mangrove and in estuary (58.9%). Thus present mangrove acts as net source for phosphate and net sink for nitrate and DSi. Nutrient ratio shows seasonal switching between potential Phosphorus and Nitrogen limitation in wet and dry season respectively. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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