However, this form of layered interventions can be difficult to plan and implement. Large funders are often reluctant to fund projects in the same areas with similar objectives to previously funded projects. For this reason, biodiversity mainstreaming initiatives often have to be completed within short funding cycles, with little chance of extension or further funding, despite the lengthy nature of biodiversity mainstreaming. In many cases, the success of biodiversity mainstreaming projects can be significantly attributed to a particular champion or leader.