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title: Pre-dispersal strategies by Quercus schottkyana to mitigate the effects of weevil infestation of acorns
author: Xia, Ke;  Harrower, William L.;  Turkington, Roy;  Tan, Hong-Yu;  Zhou, Zhe-Kun
Issued Date: 2016
Abstract: We investigated how pre-dispersal strategies may mitigate the effects of weevil infestation of acorns in a population of Quercus schottkyana, a dominant oak in Asian evergreen broad-leaved forests, and assess if weevil infestation contributes to low seedling recruitment. We counted the number of acorns produced, daily from the end of August to mid-late November for 9 years from 2006-2014. We also recorded the rate of acorn infestation by weevils and acorn germination rates of weekly collections. Annual acorn production was variable, but particularly low in 2011 and 2013. There was no trade-off between acorn production and acorn dry mass. However, acorns produced later in the season were significantly heavier. For most years: (i) the rate of weevil infestation was negatively density dependent (a greater proportion of acorns died with increased acorn density), (ii) the percentage germination of acorns was positively density dependent (proportionately more acorns germinated with increased density), and (iii) as the season progressed, the percentage of infested acorns declined while germination rates increased. Finally, (iv) maximum acorn production, percentage infestation and percentage germination were asynchronous. Although pre-dispersal mortality is important it is unlikely to be the primary factor leading to low recruitment of oak seedlings.
Source: SCIENTIFIC REPORTS
Related URLs: 10.1038/srep37520
Appears in Collections:古生态研究组_期刊论文

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Recommended Citation:
Xia, Ke,Harrower, William L.,Turkington, Roy,et al. Pre-dispersal Strategies By Quercus Schottkyana To Mitigate The Effects Of Weevil Infestation Of Acorns[J]. Scientific Reports,2016,6(X):-.

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