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SEX‐RATIO BIAS WITH ASYMMETRIC EXCHANGE OF POLLEN BETWEEN DEMES
Author(s) -
Taylor Peter D.
Publication year - 1995
Publication title -
evolution
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.84
H-Index - 199
eISSN - 1558-5646
pISSN - 0014-3820
DOI - 10.1111/j.1558-5646.1995.tb04438.x
Subject(s) - pollen , biology , gamete , pollination , sex ratio , competition (biology) , range (aeronautics) , reproductive success , ecology , botany , population , demography , sperm , materials science , composite material , sociology
In a patch of hermaphroditic plants, with a low level of pollen migration between patches, a prevailing wind creates a gradient, within the patch, in the strength of local competition among pollen for reproductive success. This leads to a sex ratio gradient, with a male (pollen) bias in downwind individuals, which can be quite strong even for large patches. The effect can be understood as follows: downwind individuals have relatively low reproductive value and respond by putting more resources into the gamete (pollen) with the best long‐range (extra‐patch) reproductive success.