Our multi-proxy limnological reconstruction revealed an abrupt ecological shift in the 1980s characterized by elevated primary production, Microcystis-dominated cyanobacterial blooms, and exponential microcystin production, in response to nutrient enrichment, climate change, and trophic cascades. By combining aliphatic hydrocarbons, photosynthetic pigments, and cyanotoxins, we quantified herein century-long changes in abundance, composition, and variability of phototrophs, particularly toxigenic algal blooms, in China's third largest freshwater Lake Taihu. Retrospective analysis of sedimentary biomarkers using up-to-date chromatography and mass spectrometry techniques provide a potential means to reconstruct the past occurrence of HABs. Unfortunately, long-term process and mechanism triggering HABs remain largely unclear due to the scarcity of temporal monitoring. Harmful algal blooms (HABs) producing toxic metabolites are increasingly threatening environmental and human health worldwide. Comparisons of socio-economic data and sedimentary archives can help to understand linkages in socioecological systems.

Landscape-scale comparisons of multiple sediment cores can help to distinguish how local versus regional stressors interact to alter the trajectory of lake ecosystem development. I am interested in pushing the capabilities of palaeolimnology beyond descriptions and quantifications of environmental change towards its use as a tool for understanding mechanisms. I have developed and applied the use of pigment proxies in sediment cores to investigate long-term changes across a very broad range of systems spanning six continents and also frequently work with other sedimentary proxies such as diatoms and stable isotopes. Such approaches are particularly informative for tracking past dynamics of cyanobacterial blooms. I am an expert in the use of chlorophyll and carotenoid pigments as bioindicators of algae and phototrophic bacteria. Combining long-term monitoring, palaeolimnology and experimental studies provides integrated insights into ecosystem functioning.

I use long-term studies to investigate how environmental problems such as nutrient pollution, climate change and hydrological manipulations have changed lakes and aquatic biota. Please visit our Shipping Policy page for more information.I combine limnology and palaeolimnology (the use of lake sediment cores to investigate past environments) to understand aquatic ecosystems. Unfortunately, in the event of a return, we are unable to refund the taxes and duties that were paid at checkout.

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