Natural habitat in the context of "Ibex"

An underwater environment is a environment of, and immersed in, liquid water in a natural or artificial feature (called a body of water), such as an ocean, sea, lake, pond, reservoir, river, canal, or aquifer. Some characteristics of the underwater environment are universal, but many depend on the local situation.

Liquid water has been present on Earth for most of the history of the planet. The underwater environment is thought to be the place of the origin of life on Earth, and it remains the ecological region most critical to the support of life and the natural habitat of the majority of living organisms. Several branches of science are dedicated to the study of this environment or specific parts or aspects of it.

Naturalistic observation, sometimes referred to as fieldwork, is a valuable form of empirical data collection in research methodology across numerous fields of science (including ethology, anthropology, linguistics, social sciences, and psychology) in which data are collected as they occur in nature, without any manipulation by the observer. Examples range from watching an animal's eating patterns in the forest to observing the behavior of students in a school setting. During naturalistic observation, researchers take great care using unobtrusive methods to avoid interfering with the behavior they are observing. Naturalistic observation contrasts with analog observation in an artificial setting that is designed to be an analog of the natural situation, constrained so as to eliminate or control for effects of any variables other than those of interest. There is similarity to observational studies in which the independent variable of interest cannot be experimentally controlled for ethical or logistical reasons.

Naturalistic observation has both advantages and disadvantages as a research methodology. Observations are more credible because the behavior occurs in a real, typical scenario as opposed to an artificial one generated within a lab. Behavior that could never occur in controlled laboratory environment can lead to new insights. Naturalistic observation also allows for study of events that are deemed unethical to study experimentally, such as the impact of high school shootings on students attending the high school. However, because extraneous variables cannot be controlled as in a laboratory, it is difficult to replicate findings and demonstrate their reliability. In particular, if subjects know they are being observed they may behave differently than otherwise. It may be difficult to generalize findings of naturalistic studies beyond the observed situations.

An underwater environment is an environment of, and immersed in, liquid water in a natural or artificial feature (called a body of water), such as an ocean, sea, lake, pond, reservoir, river, canal, or aquifer. Some characteristics of the underwater environment are universal, but many depend on the local situation.

Liquid water has been present on Earth for most of the history of the planet. The underwater environment is thought to be the place of the origin of life on Earth, and it remains the ecological region most critical to the support of life and the natural habitat of the majority of living organisms. Several branches of science are dedicated to the study of this environment or specific parts or aspects of it.

A wildlife biologist is a biologist who studies animals, their behavior, and the role each plays in its natural habitat. A wildlife biologist typically studies "whole animals", as distinct from a microbiologist, who studies microorganisms, or cellular biologist who studies life at the cellular level, or molecular biologist who studies it at the molecular level.

The duties of a wildlife biologist can include developing and conducting experiments/studies on animals in their natural habitats, studying the characteristics of animals such as their interaction with different species, their reproductive and movement patterns, the dynamic within a population, and the transmission of diseases. Wildlife biologists can also play important roles in managing and monitoring population dynamics to preserve certain species and/or environments. They observe how animals interact with one another as well as how they interact with humans. Some wildlife biologists study the impacts of human interference on an ecosystem. Wildlife biologists can work with endangered species, advocate for preservation of wildlife, resolve issues pertaining to wildlife, and manage animal populations. Many Wildlife Biologists will eventually specialize into a particular area of study defined by ecosystem or species. Some of these fields include: entomology, ornithology, marine biology, and limnology (see below).