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Related Experiment Video

Updated: Jun 11, 2026

High-Throughput Assays of Critical Thermal Limits in Insects

High-Throughput Assays of Critical Thermal Limits in Insects

Published on: June 15, 2020

Immune defence under extreme ambient temperature.

Otto Seppälä¹, Jukka Jokela

¹EAWAG, Swiss Federal Institute of Aquatic Science and Technology, 8600 Dübendorf, Switzerland. otto.seppaelae@eawag.ch

Biology Letters

|July 9, 2010

Summary

Extreme heat due to climate change weakens snail immune defenses. This makes great pond snails more vulnerable to infections, impacting aquatic ecosystems.

Area of Science:

Ecology
Environmental Science
Immunology

Background:

Global climate change is increasing extreme weather events.
Extreme temperatures can significantly impact ecological interactions.
The effects of high ambient temperatures on invertebrate immune function are not fully understood.

Purpose of the Study:

To investigate the impact of high ambient temperature on the immune function of the great pond snail (Lymnaea stagnalis).
To determine if elevated temperatures compromise immune defenses, potentially increasing susceptibility to pathogens.

Main Methods:

Snails (Lymnaea stagnalis) were exposed to a non-stressful temperature (15°C) and an extreme temperature (30°C).
Key immune traits, including haemocyte concentration, phenoloxidase activity, and antibacterial activity, were quantified.

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Field-Based Thermal Physiology Assay: Cold Shock Recovery under Ambient Conditions

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Published on: March 9, 2021

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Last Updated: Jun 11, 2026

High-Throughput Assays of Critical Thermal Limits in Insects

High-Throughput Assays of Critical Thermal Limits in Insects

Published on: June 15, 2020

Field-Based Thermal Physiology Assay: Cold Shock Recovery under Ambient Conditions

Field-Based Thermal Physiology Assay: Cold Shock Recovery under Ambient Conditions

Published on: March 9, 2021

Main Results:

Snails exposed to high temperatures (30°C) exhibited reduced immune defense.
Specifically, phenoloxidase and antibacterial activity in snail haemolymph decreased significantly.
Haemocyte concentration remained unaffected by the high temperature exposure.

Conclusions:

High ambient temperatures impair crucial components of the great pond snail's immune system.
This impairment may increase snail susceptibility to infections, with varying effects depending on the pathogen.
Differential impacts on immune traits suggest complex responses to thermal stress in invertebrates.