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Native ecosystem engineer facilitates recruitment of invasive crab and native invertebrates

Citation

Wright, JT and Gribben, PE and Latzel, S, Native ecosystem engineer facilitates recruitment of invasive crab and native invertebrates, Biological Invasions, 18, (11) pp. 3163-3173. ISSN 1387-3547 (2016) [Refereed Article]

Copyright Statement

Copyright Springer International Publishing Switzerland

DOI: doi:10.1007/s10530-016-1206-2

Abstract

Native ecosystem engineers that add physical structure to ecosystems can facilitate invasive species. In this study we determined the effects of the native tube-forming serpulid worm, Galeolaria caespitose on the recruitment of the invasive New Zealand porcelain crab, Petrolisthes elongatus, and whether invasive crab recruitment was related to the recruitment of native species. P. elongatus is abundant beneath intertidal rocks around Tasmania, southern Australia, and the underside of these rocks is usually covered with a calcareous matrix formed by the serpulid. We used an experimental approach to investigate whether rocks, serpulids on the underside of rocks and adult P. elongatus influenced the recruitment P. elongatus and native communities. P. elongatus and native invertebrates only recruited in the presence of rocks indicating the importance of rock as primary recruitment habitat. Moreover, the presence of serpulids on the underside of rocks significantly increased the recruitment of P. elongatus and native invertebrates compared to rocks without serpulids. Rocks with higher densities of adult P. elongatus at the end of the experiment also had higher densities of P. elongatus recruits. The density of P. elongatus recruits did not influence native species richness and abundance although there was some evidence that high P. elongatus recruitment was correlated with shifts in native community structure. We have shown that a native ecosystem engineer facilitates recruitment of an invasive crab but this does not appear to influence the recruitment of native species.

Item Details

Item Type:Refereed Article
Keywords:facilitation, invasive crab, Petrolisthes elongatus, recruitment, Serpulid, Galeolaria caespitose, marine intertidal, community structure, Australia
Research Division:Biological Sciences
Research Group:Ecology
Research Field:Marine and Estuarine Ecology (incl. Marine Ichthyology)
Objective Division:Environment
Objective Group:Ecosystem Assessment and Management
Objective Field:Ecosystem Assessment and Management of Marine Environments
Author:Wright, JT (Dr Jeffrey Wright)
ID Code:112097
Year Published:2016
Web of Science® Times Cited:1
Deposited By:Centre for Ecology and Biodiversity
Deposited On:2016-10-26
Last Modified:2017-03-28
Downloads:0

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