Physiological effects of interacting native and invasive bivalves under thermal stress

Across many ecosystems in North America and Europe, native freshwater bivalves (Order Unionida) are threatened by fouling and competition for food by the invasive zebra mussel Dreissena polymorpha. In light of climate change, knowledge on the influence of water temperature on these competitive effects is important, yet poorly understood. This study examines the physiological impact of the interaction between D. polymorpha and the native European unionid Anodonta cygnea over a 28-day period in response to water temperatures of 12, 19, and 25 °C by comparing their glycogen, glucose, lipid, and protein concentrations. The laboratory experiment comprised three treatments: (1) fouling of A. cygnea by D. polymorpha, (2) both species present but not fouling; and (3) a control in which A. cygnea and D. polymorpha were placed separately. Increased water temperatures caused physiological stress in D. polymorpha as evident from reduced glycogen, glucose, lipid, and protein concentrations. Dreissen..., , , # Physiological effects of interacting native and invasive bivalves under thermal stress

[https://doi.org/10.5061/dryad.0vt4b8h68](https://doi.org/10.5061/dryad.0vt4b8h68)

The data set comprises the measured storage substances (glycogen, glucose, lipid, and protein) and the calculated energy reserves of the two mussel species, the invasive *Dreissena polymorpha* and the native European unionid *Anodonta cygnea*, after a 28-day experiment on the physiological effects of their interaction in relation to water temperatures of 12, 19 and 25 °C.

## Description of the data and file structure

The data are organised in two cross tables (*A. cygnea* and *D. polymorpha*), with rows indicating the tested treatments (presence, fouling, and control) and temperatures (12, 19, and 25°C) and the columns indicating the measured storage substances (glycogen, glucose, lipid, and protein), energy reserves and biomass of attached dreissenids.

Abbreviations for parameters:

* Glycogen = Glycogen conte...