Habitat Loss and Fragmentation:
- Large-scale conversion of natural habitats, including forests, grasslands, and wetlands, for agricultural purposes results in the loss of suitable breeding and nesting sites for mourning doves.
- Fragmentation of remaining habitats due to intensive agriculture further reduces the availability of contiguous areas required for successful reproduction.
Pesticide Use:
- Intensive agriculture relies heavily on pesticides and herbicides to control pests and weeds.
- Mourning doves, as ground-feeding birds, may ingest pesticide-treated seeds and insects, leading to potential toxic effects on their reproductive success.
- Pesticides can also reduce the abundance and diversity of insects that serve as food for mourning doves and their offspring.
Nest Predation:
- Changes in agricultural landscapes, such as increased fragmentation and edge effects, can make dove nests more vulnerable to predation by mammals and other nest predators.
- Removal of natural vegetation and hedgerows, which provide cover and protection for nests, further increases the risk of nest predation.
Disruption of Migratory Patterns:
- Some mourning dove populations in the eastern US exhibit migratory behavior.
- Intensive agriculture can disrupt migratory routes and stopover sites, affecting the timing of nesting and overall reproductive success.
Competition for Resources:
- Agricultural landscapes may attract other bird species that compete with mourning doves for food and nesting sites.
- Increased competition can reduce the reproductive success of mourning doves, particularly in areas with limited resources.
Overall, while more research is needed to fully understand the specific impacts of intensive agriculture on mourning dove reproduction, the loss of natural habitats, pesticide use, nest predation, disruption of migratory patterns, and competition for resources emerge as potential contributing factors to population declines in the eastern United States.
