A method to determine the combined effects of climate change (temperature and humidity) and eggshell thickness on water loss from bird eggs
| العنوان: | A method to determine the combined effects of climate change (temperature and humidity) and eggshell thickness on water loss from bird eggs |
|---|---|
| المؤلفون: | P. Bronkhorst, L-M Veldsman, Henrik Kylin, I Engelbrecht, Hindrik Bouwman |
| المساهمون: | 10063773 - Bouwman, Hindrik, 27256839 - Kylin, Johan Henrik, 22923993 - Engelbrecht, Ilana, 24930024 - Veldsman, L.M., 13133624 - Bronkhorst, Petrus Louwrens |
| بيانات النشر: | Springer, 2019. |
| سنة النشر: | 2019 |
| مصطلحات موضوعية: | Environmental Engineering, 010504 meteorology & atmospheric sciences, Environmental contamination, Climate Change, Eggs, 010501 environmental sciences, 01 natural sciences, Bird egg, Water loss, Birds, Egg Shell, Animal science, Eggshell thinning, Geochemistry and Petrology, Effects of global warming, Environmental Chemistry, Animals, Climate change, Eggshell, 0105 earth and related environmental sciences, General Environmental Science, Water Science and Technology, Pollutant, Thinning, Chemistry, Hatching, Temperature, Humidity, Water, food and beverages, General Medicine, humanities, Eggshell thickness, sense organs, Chickens, Persistent organic pollution |
| الوصف: | Differences in bird eggshell thicknesses occur due to numerous factors, including thinning due to persistent organic pollutants. Not only does thinning weaken the shell; weaker shells combined with elevated ambient temperature and changes in humidities may result in changes in water loss rates from the egg contents. Therefore, thinner eggshells raise concern of water being lost faster than normal at lower relative humidities, which may affect hatching. To investigate the combined effects, we developed and tested an effective method that measures water loss through different thickness eggshells at controlled temperatures and relative humidities to assist in ascertaining the combined effects of climate change (temperature and humidity) and changes in eggshell thickness on bird reproduction. The fastest rate of loss was at 40% RH at 40 °C (0.1 mL/cm2/day), and the slowest was at 22 °C at 80% RH (0.02 mL/cm2/day). Eggshell thickness had a significant effect on water loss at all humidity treatments, except at the highest temperature and humidity treatment (80% RH and 40 °C). Temperature explained 40% of the variance, RH explained 20%, and interactions between temperature and humidity explained 15% of the variance (repeated-measures, two-way ANOVA). Generalized linear analyses revealed that both factors temperature and humidity contributed significantly in any two-way combinations. We have laid the ground for a system to test the combined effects of temperature and humidity changes associated with climate change and eggshell thinning associated with pollutants, on water loss across eggshells. |
| اللغة: | English |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::672bc3d970923fe8359a398c1d9ed25e https://hdl.handle.net/10394/32093 |
| Rights: | OPEN |
| رقم الانضمام: | edsair.doi.dedup.....672bc3d970923fe8359a398c1d9ed25e |
| قاعدة البيانات: | OpenAIRE |
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