If you appraise something or someone, you consider them carefully and form an opinion about them. [formal] This prompted many employers to appraise their selection and recruitment policies. [VERB noun] Gloria slid an appraising eye over the rest of the rack before reaching for the dress.
(a) Natural ecosystem boundaries occur between a tropical evergreen and riparian forest, and between the riparian forest and the river that it borders. (b) Natural boundaries occur across the gradient from marine to intertidal to foreshore environments near the shore in temperate coastal regions.
Classifying different environments: ecosystems and biomes. One way to group together areas that share characteristics is to look at the ecosystem of the area. An ecosystem is a group of living organisms interacting with the non-living parts of an environment.he harsh conditions of an extreme environment mean that only plants and animal species that have adapted are able to survive in the area. The vegetation, climate and soils are closely linked with one another. A large ecosystem is called a biome.