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Pollen diversity matters: revealing the neglected effect of pollen diversity on fitness in fragmented landscapes
Author(s) -
Breed Martin F.,
Marklund Maria H. K.,
Ottewell Kym M.,
Gardner Michael G.,
Harris J. Berton C.,
Lowe Andrew J.
Publication year - 2012
Publication title -
molecular ecology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.619
H-Index - 225
eISSN - 1365-294X
pISSN - 0962-1083
DOI - 10.1111/mec.12056
Subject(s) - biology , ecology , pollen , fragmentation (computing) , biodiversity , habitat fragmentation , inbreeding , habitat , genetic diversity , population fragmentation , mating system , mating , genetic variation , population , gene flow , demography , sociology , biochemistry , gene
Few studies have documented the impacts of habitat fragmentation on plant mating patterns together with fitness. Yet, these processes require urgent attention to better understand the impact of contemporary landscape change on biodiversity and for guiding native plant genetic resource management. We examined these relationships using the predominantly insect‐pollinated E ucalyptus socialis . Progeny were collected from trees located in three increasingly disturbed landscapes in southern Australia and were planted out in common garden experiments. We show that individual mating patterns were increasingly impacted by lower conspecific density caused by habitat fragmentation. We determined that reduced pollen diversity probably has effects over and above those of inbreeding on progeny fitness. This provides an alternative mechanistic explanation for the indirect density dependence often inferred between conspecific density and offspring fitness.