Wiktionary
n. (context biology English) The scientific study of the state of Earth's biodiversity with the objective to protect it from becoming extinct.
Wikipedia
Conservation biology is the scientific study of nature and of Earth's biodiversity with the aim of protecting species, their habitats, and ecosystems from excessive rates of extinction and the erosion of biotic interactions. It is an interdisciplinary subject drawing on natural and social sciences, and the practice of natural resource management.
The conservation ethic is based on the findings of conservation biology.
Conservation Biology is a bimonthly peer-reviewed scientific journal of the Society for Conservation Biology, published by Wiley-Blackwell. It covers the science and practice of conserving Earth's biological diversity, including issues concerning any of the Earth's ecosystems or regions. According to the Journal Citation Reports, the journal has a 2013 impact factor of 4.320.