Faunal relationships with seagrass habitat structure: a case study using shrimp from the Indo-Pacific
Richard K. F. Unsworth A E , Sammy De Grave C , Jamaluddin Jompa D , David J. Smith A and James J. Bell BA Coral Reef Research Unit, Department of Biological Sciences, University of Essex, Wivenhoe Park, Colchester CO4 3SQ, UK.
B Centre for Marine Environmental and Economic Research, School of Biological Sciences, Victoria, University of Wellington, PO Box 600, Wellington, New Zealand.
C Oxford University Museum of Natural History, Parks Road, Oxford OX1 3PW, UK.
D Center for Coral Reef Research, Hasanuddin University, Gedung PKP Lt. 5, Kampus UNHAS Tamalanrea, Makassar, 90245, Indonesia.
E Corresponding author. Email: richardunsworth@hotmail.com
Marine and Freshwater Research 58(11) 1008-1018 https://doi.org/10.1071/MF07058
Submitted: 20 March 2007 Accepted: 8 October 2007 Published: 3 December 2007
Abstract
Caridean shrimp were used as a model group to investigate the effects of seagrass floral habitat complexity on Indo-Pacific fauna. Relationships between shrimp and seagrass habitat characteristics were explored using both multivariate and multiple linear regression modelling approaches. Epifaunal shrimp assemblages were sampled in the Wakatobi Marine National Park, Indonesia. Seagrass habitat complexity had a significant positive impact on shrimp abundance (F3,59 = 17.51, P < 0.001) and species richness (F3,59 = 10.88, P < 0.001), while significantly altering shrimp assemblage structure (ANOSIM global R = 0.397, P < 0.001). In contrast to studies from other bioregions and faunal groups, species diversity and evenness were inversely related to habitat complexity. Changes in shrimp abundance, diversity and assemblage structure with habitat complexity are considered to reflect changes in individual species habitat specialisation. High complexity habitats were dominated by habitat specialists, whereas low complexity seagrass had higher numbers of habitat generalists. Generalist species may be more adapted to the reduced food availability and increased predatory pressures associated with reduced habitat complexity. Although similar patterns were observed at all sites, inter-site differences in shrimp abundance were observed. This indicates that although the present study demonstrates the importance of small-scale changes in seagrass habitat complexity to faunal assemblages, other factors related to larger spatial-scales are also important.
Additional keywords: caridean shrimp, habitat complexity, habitat structure, Indonesia, seagrass.
Acknowledgements
The authors thank the staff at the Hoga Marine Research Centre for their logistic support and Operation Wallacea who provided financial support for travel. Richard Unsworth is grateful to Dr Tim Coles and Operation Wallacea for providing a doctoral studentship; and Oxford University Museum of Natural History for providing shipping and consumable costs. Research authorisation and specimen export permits were provided by Prof. Jamaluddin Jompa and UNHAS.
Alongi, D. M. , and Christoffersen, P. (1992). Benthic infauna and organism-sediment relations in a shallow, tropical coastal area – influence of outwelled mangrove detritus and physical disturbance. Marine Ecology Progress Series 81, 229–245.
| Crossref | GoogleScholarGoogle Scholar |
Bauer, R. T. (1985a). Diel and seasonal variation in species composition and abundance of caridean shrimps (Crustacea, Decapoda) from seagrass meadows on the north coast of Puerto Rico. Bulletin of Marine Science 36, 150–162.
Connolly, R. M. (1994). A comparison of fish assemblages from seagrass and unvegetated areas of a southern Australian estuary. Australian Journal of Marine and Freshwater Research 45, 1033–1044.
| Crossref | GoogleScholarGoogle Scholar |
Gee, J. M. , and Warwick, R. M. (1994). Metazoan community structure in relation to the fractal dimensions of marine macroalgae. Marine Ecology Progress Series 103, 141–150.
| Crossref | GoogleScholarGoogle Scholar |
Hill, B. J. , and Wassenberg, T. J. (1993). Why are some prawns found in seagrass? An experimental study of brown (Penaeus esculentus) and grooved (P. semisulcatus) tiger prawns. Australian Journal of Marine and Freshwater Research 44, 221–227.
Jackson, E. L. , Attrill, M. J. , Rowden, A. A. , and Jones, M. B. (2006). Seagrass complexity hierarchies: Influence on fish groups around the coast of Jersey (English Channel). Journal of Experimental Marine Biology and Ecology 330, 38–54.
| Crossref | GoogleScholarGoogle Scholar |
Jenkins, G. P. , May, H. M. A. , Wheatley, M. J. , and Holloway, M. G. (1997). Comparison of fish assemblages associated with seagrass and adjacent unvegetated habitats of Port Phillip Bay and corner inlet, Victoria, Australia, with emphasis on commercial species. Estuarine, Coastal and Shelf Science 44, 569–588.
| Crossref | GoogleScholarGoogle Scholar |
Ledoyer, M. (1969). Les Caridea de la frondaison des herbiers de phanérogames de la région de Tuléar. Recueil des Travaux de la Station marine d’Endoume Supplement 8, 63–115.
Ledoyer, M. (1984). Les Caridea (Crustacea: Decapoda) des herbiers de phanérogames marines de Nouvelle-Calédonia (région de Nouméa). Zoologische Verhandelingen 211, 1–58.
Nelson, W. G. , and Bonsdorff, E. (1990). Fish predation and habitat complexity: Are complexity thresholds real? Journal of Experimental Marine Biology and Ecology 141, 183–194.
| Crossref | GoogleScholarGoogle Scholar |
Orth, R. J. , Heck, K. L. , and von Montfrans, J. (1984). Faunal communities in seagrass beds: A review of the influence of plant structure and prey characteristics on predator-prey relationships. Estuaries 7, 339–350.
| Crossref | GoogleScholarGoogle Scholar |
Orth, R. J. , Carruthers, T. J. B. , Dennison, W. C. , Duarte, C. M. , and Fourqurean, J. W. , et al. (2006). A global crisis for seagrass ecosystems. Bioscience 56, 987–996.
| Crossref | GoogleScholarGoogle Scholar |
Parrish, J. D. (1989). Fish communities of interacting shallow-water habitats in tropical oceanic regions. Marine Ecology Progress Series 58, 143–160.
| Crossref | GoogleScholarGoogle Scholar |
Skilleter, G. A. , Olds, A. , Loneragan, N. R. , and Zharikov, Y. (2005). The value of patches of intertidal seagrass to prawns depends on their proximity to mangroves. Marine Biology 147, 353–365.
| Crossref | GoogleScholarGoogle Scholar |
Stoner, A. W. , and Graham-Lewis, F. (1985). The influence of quantitative and qualitative aspects of habitat complexity in tropical seagrass meadows. Journal of Experimental Marine Biology and Ecology 94, 19–40.
| Crossref | GoogleScholarGoogle Scholar |
Unsworth, R. K. F. , Wylie, E. , Bell, J. J. , and Smith, D. J. (2007). Diel trophic structuring of seagrass bed fish assemblages in the Wakatobi Marine National Park, Indonesia. Estuarine, Coastal and Shelf Science 72, 81–88.
| Crossref | GoogleScholarGoogle Scholar |
Verweij, M. C. , Nagelkerken, I. , de Graaff, D. , Peeters, M. , Bakker, E. J. , and van der Velde, G. (2006). Structure, food and shade attract juvenile coral reef fish to mangrove and seagrass habitats: a field experiment. Marine Ecology Progress Series 306, 257–268.
| Crossref | GoogleScholarGoogle Scholar |