The way species interact in a community affects biodiversity. A study found that different structures can stabilize mutualistic or antagonistic communities. But when using a patch-dynamic metacommunity model, these differences disappear. Instead, nestedness and modularity work together to help communities persist. However, this effect is weaker in antagonistic communities. Over time, both types of networks become more connected, nested, and modular, except for a decrease in nestedness in antagonistic networks. In the end, there is a strong negative relationship between nestedness and modularity in both types of communities. These findings match trends seen in real-world communities.