Habitat fragmentation can, however, also have positive effects on populations. If populations exist in isolated patches, a disturbance to one patch, even if it wipes out all of the individuals in that patch, does not affect the populations of the rest of the patches. Many species need more than one type of habitat to successfully complete a life cycle. A more fragmented habitat increases the chances that the different habitats needed are close or adjacent to one another. This is true for the reptiles and amphibians that inhabit New York State forests. Edge habitats are also ideal environments for a number of species.