Relationships among climate variability, Cladocera phenology and the pelagic food web in deep lakes in different trophic states

• DOI: 10.1071/mf17243
• Publication Date: 2018-06-18T04:03:56Z
• Authors: Barbara Leoni; Veronica Nava; Martina Patelli
• Keywords: Daphnia galeata; Trophic state index; Lake ecosystem; Trophic cascade

Achieving a better understanding of the role climate change in altering population phenology, seasonal cycles freshwater organisms, and ecosystem structure function is high scientific economic value. The present paper has demonstrated different food-web responses to teleconnection indices, which are proxy fluctuations, lakes characterised by trophic levels. We analysed an 18-year long-term dataset (1998–2015) recorded deep eutrophic Lake Iseo we compared our results those concerning southern-Alpine oligotrophic lakes. Our confirmed that winter large-scale circulation patterns (for Mediterranean area: East Atlantic Pattern Eastern Pattern) control chain linked causal factors, affecting air temperature, spring water resulting vertical-mixing depth epilimnetic concentration total phosphorus. highlighted lake, phosphorus concentration, enrichment nutrients did not result either considerable increase phytoplankton growth, nor, consequently, zooplankton density peak. Whereas lakes, cascading effects influenced algal carrying capacity Daphnia density. observed climatic mediated by, for example, colder temperature spring, postponed timing recovery after diapause both primary consumers (Daphnia Eubosmina) secondary (Bythotrephes Leptodora). latter being verified first time lake.