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231226s2023 xx |||||o 00| ||eng c |
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|a 10.1111/jpy.13371
|2 doi
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|a eng
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|a Krueger-Hadfield, Stacy A
|e verfasserin
|4 aut
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|a Phenology and thallus size in a non-native population of Gracilaria vermiculophylla
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|c 2023
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|a Text
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|a ƒaComputermedien
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|a Date Revised 12.10.2023
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|a published: Print-Electronic
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|a Citation Status Publisher
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|a © 2023 The Authors. Journal of Phycology published by Wiley Periodicals LLC on behalf of Phycological Society of America.
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|a Phenology, or seasonal variation in life cycle events, is poorly described for many macroalgal species. We describe the phenology of a non-native population of Gracilaria vermiculophylla whose thalli are free-living or anchored by decorating polychaetes to tube caps. At a site in South Carolina, USA, we sampled 100 thalli approximately every month from January 2014 to January 2015. We assessed the reproductive state and measured thallus size based on wet weight, thallus length, and thallus surface area from herbarium mounts. Because life cycle stage cannot be assigned using morphology, we implemented a PCR assay to determine the life cycle stage-tetrasporophyte, female gametophyte, or male gametophyte-of each thallus. Tetrasporophytes dominated throughout the year, making up 81%-100% of thalli sampled per month. Reproductive tetrasporophytes varied between 0% and 65% of monthly samples and were most common in warm summer months (July through September) when thalli also tended to be larger. The vast majority of the reproductive thalli were worm-anchored and not fixed to hard substratum via a holdfast. Thus, free-living thalli can be reproductive and potentially seed new non-native populations. Given G. vermiculophylla reproduction seems tied closely to temperature, our work suggests phenology may change with climate-related changes in seawater temperatures. We also highlight the importance of understanding the natural history of macroalgae to better understand the consequence of range expansions on population dynamics
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|a Journal Article
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|a invasion
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|a life cycle
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|a mudflat
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|a Oetterer, Alexis P
|e verfasserin
|4 aut
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|a Lees, Lauren E
|e verfasserin
|4 aut
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|a Hoffman, Jessica M
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|a Sotka, Erik E
|e verfasserin
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|a Murren, Courtney J
|e verfasserin
|4 aut
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| 773 |
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|i Enthalten in
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|g 59(2023), 5 vom: 01. Okt., Seite 926-938
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|u http://dx.doi.org/10.1111/jpy.13371
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