Please use this identifier to cite or link to this item: http://hdl.handle.net/10316/79926
Title: Temporal changes in macrofauna as response indicator to potential human pressures on sandy beaches
Authors: Bessa, Filipa 
Gonçalves, S. G. 
Franco, J. M 
André, J. N 
Cunha, P. P 
Marques, J. C. 
Keywords: Sandy beaches; Macrofaunal assemblages; Temporal changes; Crustaceans; Human pressures; Coastal tourisma
Issue Date: 2014
Publisher: Elsevier
Project: info:eu-repo/grantAgreement/FCT/SFRH/SFRH/BD/64929/2009/PT/ECOLOGICAL STATUS AND FUNCTIONING EVALUATION OF SANDY BEACH ECOSYSTEMS: A MACROBENTHIC COMMUNITIES BASED APPROACH. (ESSAY) 
Serial title, monograph or event: Ecological Indicators
Volume: 41
Abstract: Sandy beaches are natural dynamic ecosystems, which are becoming worldwide increasingly disturbedby intensive human direct use, coastal development and erosive evolution. In this study, we have exam-ined whether ten years of potential increased human pressures have resulted in significant changes inthe macrofaunal assemblages’ structure and composition of two mesotidal sandy beaches (Cabedelo –urban beach, and Quiaios – rural beach) on the European Atlantic coast (Portugal). Seasonal macrofaunacollections were performed at both beaches in two different periods, one in 1999–2000 and another in2010–2011. The physical variables did not change significantly in both beaches throughout the studiedperiods, however, the urban beach was subject to an increase of human pressures (tourism and shorelinemodifications) over the 10-years interval considered when compared with the rural beach. The univariatecommunity descriptors (total density, species richness and diversity) did not differ significantly amongperiods for the rural beach. In contrast, temporal differences were found at the most urbanised beach,principally regarding the abundances of the amphipod Talitrus saltator and the isopod Tylos europaeus,two of the most abundant species at both beaches. PERMANOVA tests enhanced these temporal varia-tions and the SIMPER analysis attributed to these species the main differences found between periodsin this beach. Since the physical environment was similar in both periods, the ecological changes weremost likely attributed to the increased human pressures observed at the urban beach. Nevertheless, thisstudy highlights the need of further robust and effective impact assessments and long-term studies tobetter discern between natural and human induced changes on sandy beaches.
URI: http://hdl.handle.net/10316/79926
ISSN: 1470-160X
DOI: 10.1016/j.ecolind.2014.01.023
Rights: openAccess
Appears in Collections:I&D MARE - Artigos em Revistas Internacionais

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