| environ. |
biodiversity 1. Genetic diversity: the variation between individuals and between populations within a species; species diversity: the different types of plants, animals and other life forms within a region; community or ecosystem diversity: the variety of habitats found within an area - grassland, marsh, and woodland for instance. 2. An umbrella term to describe collectively the variety and variability of nature. It encompasses three basic levels of organisation in living systems: the genetic, species, and ecosystem levels. Plant and animal species are the most commonly recognized units of biological diversity, thus public concern has been mainly devoted to conserving species diversity (遗传多样性：一个物种的个体间以及群体间的变异；物种多样性：在一个区域内的植物，动物和其他生命形式的不同类型；群体或生态系统多样性：在一个地区内的栖息地的多样性(例如草地，沼泽和林地) 集中描述自然的多样性和变异性的总称。它包括生命系统的组织的三个基本层次：基因、物种和生态系统层。植物和动物物种是生物多样性最普遍认可的单位，因此，公众关注的主要是致力于保护物种多样性。) |
