Which of the following is NOT among the management improvements needed for urban forest sustainability?

In the context of urban forest sustainability, marketing tree services is not fundamentally considered a necessary management improvement. While marketing can be beneficial for awareness and engagement purposes, it does not directly address the core management strategies required to enhance the health and sustainability of urban forests.

Conversely, improved tree inventory implementation is crucial as it ensures accurate data on the current state of trees, aiding in effective management decisions. Collaboration among agencies plays a significant role in ensuring comprehensive urban forestry strategies are developed and implemented, allowing for shared resources, knowledge, and efforts in managing urban ecosystems. Lastly, possessing knowledge of forest health factors is essential in identifying and mitigating risks to tree populations, thus ensuring a resilient urban forest.

Therefore, while marketing tree services may support urban forestry initiatives, it does not fall within the essential management strategies needed for sustainability in the same way that the other options do.