Summarize this article about biodiversity loss.
Biodiversity loss refers to a decrease in the variety of genes, species, and biological communities within a defined geographic area, from a small ecosystem to the entire planet. The loss in the number, genetic variability, and variety of species can lead to the breakdown of the ecosystem's functioning, with species decline often viewed as the primary cause. However, biodiversity loss can also threaten long-term ecosystem health through subtle phenomena such as social structure disruptions, inbreeding, and genetic diversity declines. Thus, preserving biodiversity is crucial to ensuring the resilience and functioning of ecosystems at various scales, from local communities to the global biosphere.