How ecosystems adapt to face disruptive impact? The case of a commercial harbor benthic community

Commercial harbors are commonly considered as definitively lost environment sacrificed in the name of economic development, but, recently, a growing attention has been addressed to harbor ecology and harbor ecological state. The objective of this research is to identify the adaptation strategy carried out by the benthic community of Voltri harbor (NW Italy) by means of the application of a set of whole system metrics. Thermodynamic and network analysis revealed harbor benthic community characterized by an efficient and active network but also scarcely able to maintain complex structures and organisms. These results can be interpreted as evidences of adaptations carried out by the harbor benthic community that revealed itself healthy even if poorly resilient and thus not able to face further disturbances.

[1]  P. Kemp Bacterivory by benthic ciliates: significance as a carbon source and impact on sediment bacteria , 1988 .

[2]  Shu Tao,et al.  Marine coastal ecosystem health assessment: a case study of the Tolo Harbour, Hong Kong, China , 2004 .

[3]  S. Jørgensen Specific Exergy as Ecosystem Health Indicator , 2008 .

[4]  S. Jørgensen,et al.  Application of exergy and specific exergy as ecological indicators of coastal areas , 2000 .

[5]  M. Fabiano,et al.  Fungal communities in PAH-impacted sediments of Genoa-Voltri Harbour (NW Mediterranean, Italy). , 2005, Marine pollution bulletin.

[6]  J. Marques,et al.  Temporal and spatial change of exergy and ascendency in different benthic marine ecosystems , 2004 .

[7]  M. Pardal,et al.  Comparison of Talitrus saltator (Amphipoda, Talitridae) biology, dynamics, and secondary production in Atlantic (Portugal) and Mediterranean (Italy and Tunisia) populations , 2003 .

[8]  Carlo Nike Bianchi,et al.  Anchoring damage on Posidonia oceanica meadow cover: A case study in Prelo cove (Ligurian Sea, NW Mediterranean) , 2006 .

[9]  John Agard,et al.  Analysis of macrobenthic and meiobenthic community structure in relation to pollution and disturbance in Hamilton Harbour, Bermuda , 1990 .

[10]  Paolo Vassallo,et al.  Ecosystem level analysis of sandy beaches using thermodynamic and network analyses: A study case in the NW Mediterranean Sea , 2012 .

[11]  Francisco Arreguín-Sánchez,et al.  Flows of biomass and structure in an exploited benthic ecosystem in the Gulf of California, Mexico , 2002 .

[12]  S. Cheung,et al.  Subtropical meiobenthic nematode communities in Victoria Harbour, Hong Kong. , 2008, Marine pollution bulletin.

[13]  Roberto Danovaro,et al.  Detritus-Bacteria-Meiofauna interactions in a seagrass bed (Posidonia oceanica) of the NW Mediterranean , 1996 .

[14]  C. Fraser,et al.  Human impacts in an urban port: The carbonate budget, Otago Harbour, New Zealand , 2010 .

[15]  R. Bak,et al.  Seasonal fluctuations in benthic protozoan populations at different depths in marine sediments , 1989 .

[16]  R. Danovaro,et al.  Differential responses of benthic microbes and meiofauna to fish-farm disturbance in coastal sediments. , 2001, Environmental pollution.

[17]  P. Vassallo,et al.  Development of a multistep indicator-based approach (MIBA) for the assessment of environmental quality of harbours , 2008 .

[18]  Petrosillo Irene,et al.  Mapping the environmental risk of a tourist harbor in order to foster environmental security: Objective vs. subjective assessments , 2010 .

[19]  S. Opitz,et al.  Trophic network model of a shallow water area in the northern part of the Lagoon of Venice , 1999 .

[20]  P. Vassallo,et al.  Trophodynamic variations on microtidal North Mediterranean sandy beaches , 2005 .

[21]  Carl J. Walters,et al.  Ecopath with Ecosim: methods, capabilities and limitations , 2004 .

[22]  Sven Erik Jørgensen,et al.  Exergy as goal function of ecosystems dynamic , 1997 .

[23]  R. Ulanowicz Ecology, the ascendent perspective , 1997 .

[24]  J. Heymans,et al.  Energy Flow in the Kromme Estuarine Ecosystem, St Francis Bay, South Africa , 1995 .

[25]  Sven Erik Jørgensen,et al.  EXERGY AND ECOLOGICAL BUFFER CAPACITY , 1979 .

[26]  J A Mensa,et al.  JMarinas: a simple tool for the environmentally sound management of small marinas. , 2011, Journal of environmental management.

[27]  R. Ulanowicz,et al.  An informational synthesis of ecosystem structure and function , 1997 .

[28]  Robert E. Ulanowicz,et al.  Comparative ecosystem trophic structure of three U.S. mid-Atlantic estuaries , 1997 .

[29]  M. Fabiano,et al.  Nematode response to metal, PAHs and organic enrichment in tourist marinas of the Mediterranean Sea. , 2009, Marine pollution bulletin.

[30]  R. Ulanowicz,et al.  The Seasonal Dynamics of The Chesapeake Bay Ecosystem , 1989 .

[31]  B. Rygg Effect of sediment copper on benthic fauna , 1985 .

[32]  L. Vezzulli,et al.  An assessment of the spatial heterogeneity of environmental disturbance within an enclosed harbour through the analysis of meiofauna and nematode assemblages , 2008 .

[33]  S. Jørgensen,et al.  Assessing the health of coastal marine ecosystems: A holistic approach based on sediment micro and meio-benthic measures , 2006 .

[34]  J. Marques,et al.  Modelling the effects of eutrophication, mitigation measures and an extreme flood event on estuarine benthic food webs , 2011 .

[35]  Robert Costanza,et al.  Ecosystem health and ecological engineering , 2012 .

[36]  S. E. J⊘rgensen Application of exergy and specific exergy as ecological indicators of coastal areas , 2000 .

[37]  T. Pearson,et al.  Objective Selection of Sensitive Species Indicative of Pollution-Induced Change in Benthic Communities. I. Comparative Methodology , 1982 .

[38]  S. E. Jørgensen An improved parameter estimation procedure in lake modelling , 1998 .

[39]  Sven Erik Jørgensen,et al.  Analysis of the properties of exergy and biodiversity along an estuarine gradient of eutrophication , 1997 .

[40]  H. Rees,et al.  Nematodes as Sensitive Indicators of Change at Dredged Material Disposal Sites , 2000 .

[41]  Robert Costanza,et al.  What is a healthy ecosystem? , 1999, Aquatic Ecology.

[42]  Sven Erik Jørgensen,et al.  The free energy and information embodied in the amino acid chains of organisms , 2010 .