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Differences in flowering sex ratios between native and invasive populations of the seagrass Halophila stipulacea

Author:
Nguyen, Hung Manh, Kleitou, Periklis, Kletou, Demetris, Sapir, Yuval, Winters, Gidon
Source:
Botanica marina 2018 v.61 no.4 pp. 337-342
ISSN:
1437-4323
Subject:
Halophila, dioecy, flowering, indigenous species, invasive species, seagrasses, sex ratio, Cyprus, Mediterranean Sea, Red Sea
Abstract:
Deviations from the 1:1 sex ratio are common in dioecious plants. The tropical seagrass Halophila stipulacea is among an extremely rare group of dioecious plants that are widely recognized as female-biased. Here we report on differences in sex ratios between native (Eilat, northern Red Sea) and invasive (Cyprus, Mediterranean Sea) populations. While H. stipulacea populations were female-biased in their native region, invasive populations were either male- or female-biased. The existence of both sexes simultaneously in the Mediterranean invasive populations might help its ongoing expansion in the Mediterranean, thereby threatening local seagrasses species.
Agid:
6081350