Sustainability in all areas involves not just having a stable baseline population and resources that allow the system to replenish itself year to year. We need enough of a buffer to carry you through drastic circumstances.
The Bahama Parrots in Abaco use the pine forests for nesting and raising their young. the pine cones ripen just in time to feed mothers and their offspring. during the summer breeding season, but soon after, the seeds have fallen from the pine cones and the parrots have to move out of the forest to look for fruit on Gumbo Limbo, Poisonwood and other native fruit trees. Unfortunately, these trees have been largely removed from urban areas. and as we develop the island, the typical manner is to "push" everything down with a tractor leaving only limestone bedrock. This means there is less and less coppice forest with these types of fruit trees.
After Dorian, I joined an expedition to survey the terrestrial birds of Abaco and one of the saddest things I saw was Abaco parrots on the ground, scrounging in the dirt for fruit from damaged Gumbo Limbo and Palm trees https://www.flickr.com/photos/ancilleno/48943554418/in/dateposted/. This is not typical parrot behavior. The limbs and trees that had fallen in the storm, soon dropped their fruit, or the fruit fell off as people cleaned up.
There were no trees with fruit in the area or they were few and far between.
To compound the problem, a cat nearby was actively hunting as the sun set within a few steps of the parrots https://www.flickr.com/photos/ancilleno/48944309462/in/dateposted/.
The system we have created has excellent breeding area managed by the Bahamas National Trust in the Abaco National Park, which sports a huge tract of native Bahamian pines. Unfortunately, we have reduced the coppice habitat significantly and introduced invasive species such as pigs and cats that can significantly damage habitat or prey directly on the parrots themselves.
If you have the opportunity as you rebuild, think of supporting healthy forests and plant diversity and also think of the impact your pets have on the long term sustainability of the ecosystem.