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- W2340900724 abstract "MEPS Marine Ecology Progress Series Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout the JournalEditorsTheme Sections MEPS 537:105-119 (2015) - DOI: https://doi.org/10.3354/meps11421 Kelp in hot water: II. Effects of warming seawater temperature on kelp quality as a food source and settlement substrate E. J. Simonson1,*, A. Metaxas2, R. E. Scheibling1 1 Department of Biology, Dalhousie University, Halifax, Nova Scotia B3H 4R2, Canada 2Department of Oceanography, Dalhousie University, Halifax, Nova Scotia B3H 4R2, Canada *Corresponding author: erika.simonson@dal.ca ABSTRACT: Predicting the effect of climate change on communities requires an understanding of the effects of environmental conditions on species and their interactions. We investigated the potential for warming seawater temperature to modify the interactions of the gastropod mesograzer Lacuna vincta and the invasive bryozoan Membranipora membranacea with kelps in Nova Scotia. The nutritional content (C/N) of the kelps Saccharina latissima, Laminaria digitata and Agarum clathratum were unaffected by temperature (11, 18 and 21°C), and chemical defenses (phlorotannins) were reduced only in A. clathratum after 1 wk exposure to 21°C. C/N and phlorotannin content increased over the season in S. latissima collected monthly in summer 2013 and 2014. The effect of temperature-induced changes in kelp on the grazing of L. vincta was assessed using feeding experiments with S. latissima pretreated at 11 or 21°C. Snails consumed more kelp pretreated at 21°C only when grazing rate was high. The quality of S. latissima as a food source for L. vincta was not affected by temperature, as diets of kelp pretreated at 11 and 21°C supported similar growth, reproduction, and survival of snails. Temperature also did not affect the quality of kelp as a substrate for M. membranacea, since settlement rates were not different between S. latissima pretreated at ambient temperature (9 to 14) and 21°C. The absence of temperature-induced changes in kelp quality suggests that the effects of L. vincta and M. membranacea will act additively with the direct effects of temperature and cause increased biomass loss from kelp beds. KEY WORDS: Kelp · Climate change · Temperature · Saccharina latissima · Lacuna vincta · Herbivory · Membranipora membranacea · Bryozoans Full text in pdf format Supplementary material PreviousNextCite this article as: Simonson EJ, Metaxas A, Scheibling RE (2015) Kelp in hot water: II. Effects of warming seawater temperature on kelp quality as a food source and settlement substrate. Mar Ecol Prog Ser 537:105-119. https://doi.org/10.3354/meps11421 Export citation RSS - Facebook - Tweet - linkedIn Cited by Published in MEPS Vol. 537. Online publication date: October 14, 2015 Print ISSN: 0171-8630; Online ISSN: 1616-1599 Copyright © 2015 Inter-Research." @default.
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- W2340900724 title "Kelp in hot water: II. Effects of warming seawater temperature on kelp quality as a food source and settlement substrate" @default.
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