Data accessibility for conservation implications of genetic structure in the narrowest endemic quillwort from the Eastern Amazon

The quillwort Isoetes cangae is a critically endangered species occurring
in a single lake in Serra dos Carajás, Eastern Amazon. Low genetic
diversity and small effective population sizes (Ne) is expected for narrow
endemic species (NES). Here, we evaluated genetic diversity, population
structure, and Ne of I. cangae to provide information for conservation
programs. Conservation biology studies centered in a single‐species show
some limitations but they are still useful considering the limited time
and resources available for the protection of species at risk of
extinction. Our analyses were based on 55 individuals collected from the
Amendoim lake and 35,638 neutral SNPs. Our results indicated a single
panmictic population, moderate levels of genetic diversity, and effective
population size (Ne) in the order of thousands, contrasting the expected
for NES. Negative FIS values were also found, suggesting that I. cangae is
not under risk of inbreeding depression. Our findings imply that I. cangae
contains enough genetic diversity to ensure evolutionary potential, all
individuals should be treated as one demographic unit.