Triple Oxygen Isotope Measurements (Δ'¹⁷O) of Body Water Reflect Water Intake, Metabolism, and δ¹⁸O of Ingested Water in Passerines.

ABSTRACT: Understanding physiological traits and ecological conditions that influence a species reliance on metabolic water is critical to creating accurate physiological models that can assess their ability to adapt to environmental perturbations (e.g., drought) that impact water availability. However, relatively few studies have examined variation in the sources of water animals use to maintain water balance, and even fewer have focused on the role of metabolic water. A key reason is methodological limitations. Here, we applied a new method that measures the triple oxygen isotopic composition of a single blood sample to estimate the contribution of metabolic water to the body water pool of three passerine species. This approach relies on Δ'¹⁷O, defined as the residual from the tight lin

SUBMITTER: Sabat P 

PROVIDER: S-EPMC8450417 | biostudies-literature | 2021

REPOSITORIES: biostudies-literature