Original sentence: On the other hand, it is not a typical reseeder either, because of its relatively low fire mortality rates, and because it is only weakly serotinous: though fire promotes seed release, seed release still occurs in the absence of fire.On the other hand, it shows little susceptibility to increases in fire interval: though senescence and death are often observed in plants older than about 30 years, healthy stands have been observed that have escaped fire for 50 years.Speciation would be made possible by the much reduced genetic exchange between crest plants and swale plants, though evidence suggests that there was some introgression at first
Edited sentence: On the other hand, it is not a typical reseeder either, because of its relatively low fire mortality rates, and because it is only weakly serotinous: although fire promotes seed release, seed release still occurs in the absence of fire.On the other hand, it shows little susceptibility to increases in fire interval: although senescence and death are often observed in plants older than about 30 years, healthy stands have been observed that have escaped fire for 50 years.Speciation would be made possible by the much reduced genetic exchange between crest plants and swale plants, although evidence suggests that there was some introgression at first