英语求翻译：这句子中前面should that part怎么理解？

Question

Should that part increase only slightly (even by chance alone), many, many more sea stars couldbe present on a reef, and their feeding activities could greatly alter theecology on the reefs where they settle.

Answer 1

Should that part increase only slightly (even by chance alone),
如果那部分只是轻微地增长(甚至是偶然单独地增长)，

虚拟语气，等于If that part should increase slightly
many, many more sea stars could be present on a reef,
就会有许多海星就可以到达暗礁，
and their feeding activities could greatly alter the ecology on the reefs where they settle.
它们的饮食活动将很大程度改变它们栖息的暗礁上的生态。

Answer 2

句子开头的 should 可以理解为 if：

[Should] that part [increase] only slightly, many more sea stars could be..., and...could greatly...
[If] that part [increased] only slightly..., many more sea stars could be..., .and...could greatly...

Answer 3

没看到前面的句子。这句是虚拟，翻译是 暗礁那部分本来是缓慢增长的，但有可能因为很多海星....