A biotope is an area of uniform environmental conditions providing a living place for a specific assemblage of plants and animals. Biotope is almost synonymous with the term habitat, which is more commonly used in English-speaking countries. However, in some countries these two terms are distinguished: the subject of a habitat is a population, the subject of a biotope is a biocoenosis or biological community. A biotope is an area of uniform environmental conditions providing a living place for a specific assemblage of plants and animals. Biotope is almost synonymous with the term habitat, which is more commonly used in English-speaking countries. However, in some countries these two terms are distinguished: the subject of a habitat is a population, the subject of a biotope is a biocoenosis or biological community. It is an English loanword derived from the German Biotop, which in turn came from the Greek bios, 'life' and topos, 'place'. (The related word geotope has made its way into the English language by the same route, from the German Geotop.) The concept of a biotope was first advocated by Ernst Haeckel (1834-1919), a German zoologist famous for the recapitulation theory. In his book General Morphology (1866), which defines the term 'ecology', he stresses the importance of the concept of habitat as a prerequisite for an organism's existence. Haeckel also explains that with one ecosystem, its biota is shaped by environmental factors (such as water, soil, and geographical features) and interaction among living things; the original idea of a biotope was closely related to evolutional theory. Following this, F. Dahl, a professor at the Berlin Zoological Museum, referred to this ecological system as a 'biotope' (biotop) (1908). Although the term 'biotope' is considered to be a technical word with respect to ecology, in recent years the term is more generally used in administrative and civic activities. Since the 1970s the term 'biotope' has received great attention as a keyword throughout Europe (mainly Germany) for the preservation, regeneration, and creation of natural environmental settings. Used in this context, the term 'biotope' often refers to a smaller and more specific ecology and is very familiar to human life. In Germany especially, activities related to regenerating biotopes are enthusiastically received. These activities include — Various sectors play a part in these activities, including architecture, civil engineering, urban planning, traffic, agriculture, river engineering, limnology, biology, education, landscape gardening, and domestic gardening. In all fields, all sorts of people are seeking a viable way for humans to respect other living things. The term 'biotope' would include a complete environmental approach. The following four points are the chief characteristics of biotopes.