Enhanced ecological indication based on combined planktic and benthic functional approaches in large river phytoplankton ecology
The occurrence of benthic diatoms in large river plankton is considered to be highly stochastic. Accordingly, the widely applied phytoplankton functional group concept sensu Reynolds (FG) classifies all benthic diatom taxa together. Based on data of a high-frequency 1-year long phytoplankton survey of the Pearl River (China), we tested whether the combination of the FG system with various trait-based classifications of benthic diatoms enhances our ability in predicting the community composition from the local environment. Using the Self-Organizing Map approach, we identified characteristic community compositions based on (i) taxonomic data, (ii) the FG approach, and (iii) the FG system combined with trait-based functional approaches of benthic diatoms: size structure, ecological guilds, and eco-morphological groups. All combined functional approaches enabled better predictions for the community composition than the taxonomic data or the FG system alone. The most reliable approach was the combination of the FG system with ecological guilds of benthic diatoms. Therefore, the occurrence of benthic diatoms in large river phytoplankton can be assessed ecologically in a meaningful way based on combined planktic and benthic functional classifications. The application of this approach seems to be highly relevant in large river phytoplankton ecology, ecological modelling, or in ecological status indication.
KeywordsBenthos Diatoms Ecological guilds Functional groups Functional traits Potamoplankton
This work was supported by the Science and Technology Program of Guangzhou, China (ref. no.: NO.201707010310), by the Central Public-interest Scientific Institution Basal Research Fund, CAFS (ref. no.: NO.2016RC-LX01), and by the National Natural Science Foundation of China (ref. no.: NO.41403071). AA acknowledges the support by the National Research, Development and Innovation Office (NKFIH, ref. no.: PD 124681). VBB is thankful for the support of the National Research, Development and Innovation Office (NKFIH, ref. no.: GINOP-2.3.2-15-2016-00019). CSS-K acknowledges the support by the Széchenyi 2020 program (ref. no.: EFOP-3.6.1-16-2016-00015). We thank Elaine Monaghan, BSc (Econ), from Liwen Bianji, Edanz Editing China (www.liwenbianji.cn/ac) for editing the English text of the first draft version of our manuscript.
CW and XL collected the data; AA formulated the idea; AA and VBB classified algae according to functional approaches; CW performed statistical analysis; CW, VBB, and AA wrote the first draft of the manuscript and then all authors contributed to revisions substantially.
- Ács, É., K. Szabó, Á. K. Kiss, B. Tóth, Gy. Záray & K. T. Kiss, 2006. Investigation of epilithic algae on the River Danube from Germany to Hungary and the effect of a very dry year on the algae of the River Danube. Archiv für Hydrobiologie, Supplement band Large Rivers 16: 389–417.Google Scholar
- Alhoniemi, E., J. Himberg, J. Parhankangas & J. Vesanto, 2000. SOM Toolbox [online] http://www.cis.hut.fi/somtoolbox/.
- B-Béres, V., Á. Lukács, P. Török, Zs. Kókai, Z. Novák, E. T-Krasznai, B. Tóthmérész & I. Bácsi, 2016. Combined eco-morphological functional groups are reliable indicators of colonization processes of benthic diatom assemblages in a lowland stream. Ecological Indicators 64: 31–38.CrossRefGoogle Scholar
- Bolgovics, Á., G. Várbíró, É. Ács, Zs. Trábert, K. T. Kiss, V. Pozderka, J. Görgényi, P. Boda, B. A. Lukács, Zs. Nagy-László, A. Abonyi & G. Borics, 2017. Phytoplankton of rhithral rivers: its origin, diversity and possible use for quality-assessment. Ecological Indicators 81: 587–596CrossRefGoogle Scholar
- Borics, G., G. Várbiró, I. Grigorszky, E. Krasznai, S. Szabó & K. T. Kiss, 2007. A new evaluation technique of potamo-plankton for the assessment of the ecological status of rivers. Archiv für Hydrobiologie, Supplement band Large rivers 17: 466–486.Google Scholar
- Chessel, D., A. B. Dufour & J. Thioulouse, 2004. The ade4 package-I- One-table methods. R News. 4: 5–10.Google Scholar
- Dray, S., A. B. Dufour & D. Chessel, 2007. The ade4 package-II: Two-table and K-table methods. R News 7(2): 47–52.Google Scholar
- GB11893-89, 1990. Determination of total phosphorus in water quality ammonium molybdate spectrophotometric method. State Bureau of environmental protection of China.Google Scholar
- GB11894-89, 1990. Determination of total nitrogen in water quality by alkaline potassium persulfate digestion UV Spectrophotometry. State Bureau of environmental protection of China.Google Scholar
- GB7479-87, 1987. Determination of ammonium in water quality by NAH’s reagent colorimetric method. State Bureau of environmental protection of China.Google Scholar
- GB7480-87, 1987. Determination of nitrate nitrogen in water quality of phenol two sulfonic acid spectrophotometric method. State Bureau of environmental protection of China.Google Scholar
- GB7493-87, 1987. Determination of nitrite in water by spectrophotometric method. State Bureau of environmental protection of China.Google Scholar
- Giraudoux, P., 2015. Package ‘pgirmess’. https://cran.r-project.org/web/packages/pgirmess/index.html.
- Kelly, M. G., A. Cazaubon, E. Coring, A. Dell’Uomo, L. Ector, B. Goldsmith, H. Guasch, J. Hürlimann, A. Jarlman, B. Kawecka, J. Kwandrans, R. Laugaste, E. A. Lindstrøm, M. Leitao, P. Marvan, J. Padisák, E. Pipp, J. Prygiel, E. Rott, S. Sabater, H. van Dam & J. Vizinet, 1998. Recommendations for the routine sampling of diatoms for water quality assessments in Europe. Journal of Applied Phycology 10: 215–224.CrossRefGoogle Scholar
- Leitão, M. & A. Lepretre, 1998. The phytoplankton of the River Loire, France: a typological approach. Verh and lungen des International en Verein Limnologie 26: 1050–1056.Google Scholar
- Marcel, R., V. Berthon, V. Castets, V., F. Rimet, A. Thiers, F. Labat & B. Fontan, 2017. Modelling diatom life forms and ecological guilds for river biomonitoring. Knowledge and Management of Aquatatic Ecosystem 418(1), https://doi.org/10.1051/kmae/2016033.
- Reynolds, C. S. & J. P. Descy, 1996. The production, biomass and structure of phytoplankton in large rivers. Archiv für Hydrobiologie, Supplement band Large Rivers 10: 161–187.Google Scholar
- Rimet, F. & A. Bouchez, 2012. Life-forms, cell sizes and ecological guilds of diatoms in European rivers. Knowledge and Management of Aquatic Ecosystems 406: 1283–1299.Google Scholar
- SL91.1-1994, 1994. Determination of silicon dioxide (soluble) in water by silicon molybdenum yellow spectrophotometric method. State Bureau of environmental protection of China.Google Scholar
- Van den Hoek, C. D., G. Mann & H. M. Jahns, 1995. Algae: an Introduction to Phycology. Cambridge University Press, Cambridge.Google Scholar
- Várbíró, G., É. Ács, G. Borics, K. Érces, G. Fehér, I. Grigorszky, T. Japport, G. Kocsis, E. Krasznai, K. Nagy, Zs. Nagy-László, Zs. Piliszky & K. T. Kiss, 2007. Use of Self Organizing Maps (SOM) for characterization of riverine phytoplankton associations in Hungary. Archiv für Hydrobiologie 161: 388–394 (Large Rivers Vol. 17, no. 3–4).Google Scholar