The threshold responses of phytoplankton community to nutrient gradient in a shallow eutrophic Chinese lake |
| |
| Affiliation: | 1. Biological and Environmental Sciences, University of Stirling, Stirling FK9 4LA, UK;2. Department of Biology & CESAM, University of Av, Campus de Santiago, 3810-193 Aveiro, 9, Portugal;3. European Commission Joint Research Centre (JRC), I-21027, Ispra, Italy;4. Bowburn Consultancy, 11 Monteigne Drive, Bowburn, Durham DH6 5QB, UK;5. Department of Geography, Nottingham University, Nottingham NG7 2RD, UK;1. Department of Hydrology and Water Resources Management, Institute for Natural Resource Conservation, Kiel University, 24118 Kiel, Germany;2. Aarhus Institute of Advanced Studies, Aarhus University, Høegh-Guldbergs Gade 6B, 8000 Aarhus C, Denmark;3. Department of Bioscience, Aarhus University, Ole Worms Allé 1, 8000 Aarhus C, Denmark;4. GFZ German Research Centre for Geosciences, Section 5.4 Hydrology, Potsdam, Germany |
| |
| Abstract: | Excessive nutrient loads resulted in cascading trophic effects and ecosystem responses. Aims of this study were to determine if the thresholds in nutrient gradient related to phytoplankton community composition could be identified in eutrophic lake, and further to analyze the change of phytoplankton assemblage along the nutrient concentration based on Threshold Indicator Taxa ANalysis (TITAN). The results presented the significant community thresholds estimate for negative taxa declining at 1.650 mg/L TN and 131.5 μg/L TP, as well as simultaneously increasing for positive taxa at 1.665 mg/L TN and 151.5 μg/L TP along nutrient enrichment gradient. However, there was unremarkable change point determined for TN:TP ratios in Lake Dianchi. Elevated TN and TP altered the phytoplankton assemblage, even may induce the fade of algal blooms across the threshold in the hypertrophic lake. The findings could provide implications for deeply deciphering abrupt transitions for phytoplankton assemblage and developing nutrient tactics to protect the lake ecosystems. |
| |
| Keywords: | Nutrient thresholds Eutrophication Phytoplankton community TITAN Change point Lake ecosystems |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
