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Interactive effects of canopy-driven changes in light, scour and water flow on microscopic recruits in kelp


Tatsumi, M and Layton, C and Cameron, MJ and Shelamoff, V and Johnson, CR and Wright, JT, Interactive effects of canopy-driven changes in light, scour and water flow on microscopic recruits in kelp, Marine Environmental Research, 171 Article 105450. ISSN 0141-1136 (2021) [Refereed Article]

Copyright Statement

2021 Published by Elsevier Ltd.

DOI: doi:10.1016/j.marenvres.2021.105450


Ecosystem engineering kelp forms habitat and influences associated communities by altering abiotic conditions. These conditions can also affect the engineer's own demographic rates but the mechanisms underpinning these feedbacks are not well known. Here, we tested the interactive effects of three abiotic factors engineered by the Australasian kelp Ecklonia radiata (light, water flow and scour) on the early survivorship and growth of its outplanted microscopic recruits. After six weeks, recruit survivorship was high in the absence of scour and low light (23 times higher than when scour was present) and under low water flow-ambient light conditions. Growth of sporophytes was strongly related to light, with recruits under ambient light approximately four times larger after six weeks. Overall, reduced scour (for survivorship) and ambient light (for growth) appear crucial for maximising E. radiata recruitment suggesting a healthy forest can provide microenvironments to enhance survivorship while gaps in the canopy enhance growth.

Item Details

Item Type:Refereed Article
Keywords:kelp, recruitment, ecosystem engineering, positive feedback
Research Division:Biological Sciences
Research Group:Ecology
Research Field:Community ecology (excl. invasive species ecology)
Objective Division:Environmental Management
Objective Group:Coastal and estuarine systems and management
Objective Field:Coastal or estuarine biodiversity
UTAS Author:Tatsumi, M (Mr Masayuki Tatsumi)
UTAS Author:Layton, C (Dr Cayne Layton)
UTAS Author:Cameron, MJ (Mr Matthew Cameron)
UTAS Author:Shelamoff, V (Dr Victor Shelamoff)
UTAS Author:Johnson, CR (Professor Craig Johnson)
UTAS Author:Wright, JT (Associate Professor Jeffrey Wright)
ID Code:149168
Year Published:2021
Web of Science® Times Cited:4
Deposited By:Ecology and Biodiversity
Deposited On:2022-03-15
Last Modified:2022-04-08

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