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Marine Biology

, 163:177 | Cite as

Habitat disruption by a coastal invader: local community change in Atlantic Canada sedimentary habitats

  • Vanessa Lutz-Collins
  • Ruth Cox
  • Pedro A. QuijónEmail author
Invasive Species - Original paper
Part of the following topical collections:
  1. Invasive Species

Abstract

While digging and foraging, the non-indigenous green crab (Carcinus maenas) creates a landscape of distinctive pits or depressions in the sediment. Despite their visibility and widespread occurrence in Atlantic Canada and elsewhere, the community influence and persistence of this disturbance remain undocumented. This study addressed this gap in our knowledge using two approaches. First, in both sandy and muddy habitats, we monitored fresh feeding pits (disturbed sediments) for up to 9–11 days after their formation, recording their sediment properties and diversity and density of invertebrate fauna, and comparing these characteristics to those of ambient (undisturbed) sediments in similar habitat. Second, we quantified local-scale invertebrate diversity and density in feeding pits and ambient sediments in muddy habitat only, at three other sites within a Marine Protected Area (MPA). Grain size did not differ between disturbed and ambient sediments and did not change over time within habitats. We also found no significant differences in invertebrate diversity and density between disturbed and undisturbed sandy sediments. In contrast, the invertebrate fauna differed significantly between disturbed and ambient muddy sediments, particularly during the first 4 days after disturbance. Feeding pits in muddy sediments also took twice longer to fill up than pits in sandy sediments. These results were consistent with the comparison of disturbed and undisturbed muddy sediments in the MPA: at least at the local scale, the foraging by this invader significantly altered community structure. Ambient sediments had a higher number of species and nearly twice as many invertebrates compared to disturbed sediments. Overall, our results suggest that visual evidence of green crab feeding pits in muddy sediments can be used as a fairly reliable predictor of local-scale changes in invertebrate communities. The persistence of these local-scale changes depends on the type of habitat in which the disturbance takes place.

Keywords

Bivalve Polychaete Sandy Sediment Marine Protect Area Rose Bengal 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Notes

Acknowledgments

We thank J. Davidson and D. Giberson (UPEI) and K. Reise (AWI) in addition to an anonymous reviewer for their comments on earlier versions of this manuscript. The field and laboratory assistance of L. Rosenberg, M. Wadowski, A. Malyshev, J. Willis and M. Parent is also appreciated. This study was funded by a Natural Sciences and Engineering Research Council (NSERC) Discovery Grant and a MRG-UPEI grant both awarded to PAQ, and a NSERC PGS-M to VLC. RC was funded by the Canada Excellence Research Chairs Program. PAQ also wishes to acknowldege E. Jaramillo (UACH), who first instilled on him an interest on feeding pits and benthic ecology while working in southern Chile estuaries.

Compliance with ethical standards

Conflict of interest

The authors have no conflict of interest.

Informed consent

Consent was obtained from all participants in this study, and all required permissions were obtained to sample animals for the study.

Human and animal rights statement

All applicable international, national and/or institutional guidelines for the care and use of animals were followed. This study did not involve the use of human participants.

Supplementary material

227_2016_2947_MOESM1_ESM.pdf (86 kb)
Supplementary material 1 (PDF 85 kb)
227_2016_2947_MOESM2_ESM.pdf (105 kb)
Supplementary material 2 (PDF 104 kb)
227_2016_2947_MOESM3_ESM.pdf (15 kb)
Supplementary material 3 (PDF 15 kb)

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Copyright information

© Springer-Verlag Berlin Heidelberg 2016

Authors and Affiliations

  1. 1.Department of BiologyUniversity of Prince Edward IslandCharlottetownCanada
  2. 2.Department of Health Management, Atlantic Veterinary CollegeUniversity of Prince Edward IslandCharlottetownCanada

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