As a general rule, forests dominated by angiosperms (broadleaf forests) are more species-rich than those dominated by gymnosperms (conifer or needleleaf forests), although exceptions exist (for example, species-poor aspen and birch stands in northern lati
As a general rule, forests dominated by angiosperms (broadleaf forests) are more species-rich than those dominated by gymnosperms (conifer or needleleaf forests), although exceptions exist (for example, species-poor aspen and birch stands in northern lati
作为普遍规则，受被子植物支配的森林（阔叶林）比那些受裸子植物支配的森林（松树或针叶林）物种丰富，虽然有例外存在（例如，种类匮乏的白杨和桦树生长在北纬度地区）。