Related Experiment Video
Updated: Jun 27, 2026

Field-Based Thermal Physiology Assay: Cold Shock Recovery under Ambient Conditions
Published on: March 9, 2021
Phenological Plasticity and Bio-Physiological Impacts of Corythucha arcuata Under Aridity and Edge Dynamics in
Cristina Stancă-Moise1, George Moise1, Anca Șipoș1
1Department of Agricultural Sciences and Food Engineering, Faculty of Agricultural Sciences, Food Industry and Environmental Protection, "Lucian Blaga" University of Sibiu, 5-7 Ion Ratiu Street, 550003 Sibiu, Romania.
Abstract:
The invasive expansion of the oak lace bug (Corythucha arcuata) represents a major threat to European oak forests, yet the synergistic roles of climatic stressors remain poorly understood. This study investigates the phenological plasticity and adaptive thermoregulation of C. arcuata in the specific microclimatic conditions of the Rășinari Forest District, Romania. Monitoring across an altitudinal gradient (525-825 m) identified a complex voltinism, characterized by a highly successful second generation (G2) and a restricted third generation (G3, <12% emergence due to early frosts). By utilizing a physiological time scale (GDD), we demonstrated that G2 exhibits a 15% temporal compression in development duration compared to G1. A critical tipping point for host vulnerability was identified at a De Martonne Aridity Index (IAr) value of 20. Below this threshold, oak trees underwent a linear physiological decline, with a 74.5% decrease in chlorophyll content and a 58.8% accumulation of soluble sugars. These findings support the metabolic bait hypothesis, where drought-stressed foliage becomes a high-quality nutritional resource. Furthermore, we established a critical thermal threshold of 32 °C, which triggers active vertical migration from the sun-exposed canopy to shaded interiors to avoid heat stress. Our results provide a predictive framework for sustainable forest management, identifying aridity as an injury amplifier that facilitates pest impacts under a warming climate.
More Related Videos
10:14Reconstructing Terrestrial Paleoclimate and Paleoecology with Fossil Leaves Using Digital Leaf Physiognomy and Leaf Mass Per Area
Published on: October 25, 2024
09:23JenaTron - An Experimental Approach to Study the Effects of Plant History and Soil History on Grassland Ecosystem Functioning
Published on: March 21, 2025
Related Concept Videos
Biological Clocks and Seasonal Responses
Ecological Disturbance
Ecological Succession
Background and Environment Affect Phenotype
An example of how genetic background affects phenotype can be seen in horses. The Extension gene in horses is responsible for their coat color. A wild-type gene (EE) produces black pigment in the coat, while a mutant gene (ee) produces red pigment. A...
Habitat Fragmentation
Osmoregulation in Insects