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Dissertation
Year: 2024 Publisher: Liège Université de Liège (ULiège)
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The significant increase in global warming has multiple impacts on biodiversity. These impacts do not affect all ecosystems in the same way. Some regions, such as the Mediterranean, are already being severely affected by aridification. This study examines the impact of this rise in temperature on the Eleonora's falcon (Falco eleonorae). This emblematic bird of prey, which breeds on Mediterranean cliffs, has a particular ecology that makes it potentially vulnerable to the threat of drought. Specifically, this study focused on the falcon's use of water during the less studied pre-breeding period on a small island in Greece. The duration of water bathing and wetting and the frequency of drinking, which are thermoregulatory behaviours in birds, were correlated with temperature. These correlations confirm a relationship between rising temperatures and water use behaviour, especially for the drinking frequency. These behaviours, which are more pronounced on days when the temperature is higher, show that the falcon needs this water to regulate its body temperature. A comparison of these behaviours as a function of the variation in plumage (dark morph and light morph) of the falcons was also carried out but showed no variation. This study, among others, provides valuable information for future conservation projects for the species.
Eleonora's falcon --- Birds --- Thermoregulation --- Climate change --- Aridification --- Pre-breeding --- Conservation --- Water usage --- Sciences du vivant > Sciences de l'environnement & écologie
Book
ISBN: 3110382024 1523104562 9783110315561 3110315564 9781523104567 9783110315530 9783110382020 311031553X Year: 2015 Publisher: Berlin, Germany Boston, Massachusetts
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Water is the basis of all life. Preservation of aquatic ecosystems and protection of water resources thus are among the most important goals of a sustainable development. The quality of water is mainly determined by its constituents, the entirety of the substances dissolved or suspended in water. To assess the water quality on a sound basis requires in-depth knowledge about the occurrence, behavior and fate of these constituents. That explains the importance of hydrochemistry (also referred to as water chemistry or aquatic chemistry) as a scientific discipline that deals with water constituents and their reactions within the natural water cycle and within the cycle of water use. This textbook introduces the elementary basics of hydrochemistry with special focus on reaction equilibria in aquatic systems and their mathematical description. It is designed as an introductory textbook for students of all environment-related courses who are beginning their hydrochemical education. Only minor knowledge in General Chemistry is required to understand the text. The book is also suitable for continuing education. Topics discussed in this textbook include: structure and properties of water, concentration measures and activities, colligative properties, basics of chemical equilibria, gas-water partitioning, acid/base reactions, precipitation/dissolution, calco-carbonic equilibrium, redox reactions, complex formation, and sorption. The text is supplemented by numerous figures and tables. More than 50 examples within the text as well as more than 60 problems to be solved by the reader support the acquiring of knowledge. Complete and detailed solutions to all problems are given in a separate chapter.
Salinization. --- Water chemistry. --- Water usage. --- Water. --- Water chemistry --- Physical Geography --- Geography --- Earth & Environmental Sciences --- Aquatic chemistry --- Chemical hydrology --- Hydrochemistry --- Hydrogeochemistry --- Natural water chemistry --- Geochemistry --- Hydrology --- Aquatic systems, Hydrochemistry, Hydrochemical reactions, Water constituents, Water quality.
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