1. Disruption of ecosystem services: Lemurs play various roles in ecosystems, such as seed dispersal and pollination. Their extinction could lead to changes in plant communities and ecosystem functioning.

2. Loss of biodiversity: Lemurs are a diverse group with many unique species. Their extinction would represent a significant loss of biodiversity and could impact ecosystem resilience.

3. Impacts on other species: Lemurs interact with other animals, including predators and prey. Their extinction could have cascading effects on other species and disrupt ecological communities.

4. Loss of cultural heritage: Lemurs have cultural and symbolic significance for local communities in Madagascar. Their extinction could negatively impact cultural traditions and identities.

Potential impacts of extinctions on forests:

1. Increased habitat loss and fragmentation: The extinction of lemurs could lead to changes in vegetation and forest structure, making them more susceptible to deforestation and fragmentation.

2. Loss of seed dispersal: Lemurs are crucial for seed dispersal, helping to maintain forest regeneration and plant diversity. Their extinction could lead to a decline in forest health and diversity.

3. Changes in forest dynamics: Lemurs influence forest dynamics through their interactions with plants and other animals. Their extinction could alter nutrient cycling, plant competition, and other ecological processes.

4. Reduced resilience to disturbances: Lemurs play a role in maintaining forest resilience to natural disturbances such as fires and cyclones. Their extinction could make forests more vulnerable to damage and slow recovery.

To mitigate these potential impacts, conservation efforts should prioritize the protection of lemur habitats, combating deforestation and hunting, and implementing conservation strategies that address the underlying causes of extinction threats.