The quality of organisms in an ecosystem being linked together in a network of interactions is called interdependence.

Here's why:

* Interdependence means that organisms rely on each other for survival and well-being.

* This network of interactions can be complex and include relationships like predator-prey, competition, symbiosis (mutualism, commensalism, parasitism), and even indirect interactions through shared resources.

* This interdependence is crucial for the stability and resilience of the ecosystem. Changes in one population can have cascading effects on other populations within the system.

So, the interconnectedness of organisms in an ecosystem is best described as interdependence.