Entries by Alfonso Siciliano

Conference: “Host variety enhances diversity: the role of multiple secondary habitat-forming seaweeds in facilitating estuarine invertebrate communities”

New Zealand Marine Science Society conference (NZMSS) 2017, University of Canterbury, New Zealand Alfonso Siciliano, Mads S. Thomsen, David R. Schiel   Abstract Shell-forming molluscs are primary habitat-forming species that affect the structure of invertebrate assemblages in sedimentary estuaries. Importantly, their shells provide hard substratum that seaweeds attach to, and these seaweeds can subsequently provide […]

Conference: “Habitat cascade destroyed in the Kaikoura earthquake”

New Zealand Marine Science Society conference (NZMSS) 2017, University of Canterbury, New Zealand Mads S. Thomsen, Isis Metcalfe, Alfonso Siciliano, Tommaso Alestra, Stacie Lilley, Shawn Gerrity, David R. Schiel X Abstract It is well-described how anthropogenic activities and natural disaster can destroy primary habitat-forming species, like seagrasses, corals and kelps. However, less research and conservation effort […]

PNZ1 – Host variety enhances diversity: the role of multiple secondary habitat-forming seaweeds in facilitating estuarine invertebrate communities

This project describes the simplest habitat cascade system documented during my PhD, in soft-bottom shells-bed estuaries. Here, my aim was to test if habitat cascades are strongly affected by the biomass of the secondary habitat formers and if different secondary habitat former species (i.e., ecologically and morphologically different) facilitate clients differently. Feature of this project […]

PNZ2 – High level habitat cascades: a comparison in estuarine environments

As complementary to the previous project, here I described a higher-level habitat cascade, again in soft-bottom estuarine communities, testing how a higher order habitat cascade affects client diversity. Here, the primary habitat former was again a bivalve while both the secondary and tertiary habitat formers were seaweeds but different in species and morphologically features (see […]

PNZ3 – Effects of drifting seaweeds on habitat cascades in soft-bottom seagrass systems

With a change of habitat, this project described habitat cascades supported by seagrass and drifting/entangled seaweeds, respectively as primary and secondary habitat formers, testing which factors can shape habitat cascades in soft-bottom seagrass systems. Compared to the project 1, here the differences between primary and secondary habitat formers are less pronounced as both of them […]

PNZ4 – Effects of local anthropogenic stressors on habitat cascades in soft -bottom seagrass systems

As complementary to the previous project, here I described how anthropogenic factors, such as nutrient enrichment and sediment pollution, can reduce the seagrass performances and how high rate of sedimentation can destabilize the habitat cascades existing in seagrass systems. ______________________________________________ Here, I investigated the effects of eutrophication and sedimentation on the Zostera muelleri performances and […]

PNZ5 – Are habitat cascades similar between morphologically comparable canopy-forming hosts and epiphytes?

This project described how habitat cascades supported on rocky shore by brown canopy-forming seaweeds were shaped in presence of epiphytes, respectively as primary and secondary habitat formers. In line with the other projects, here I tested how the presence of the secondary habitat former can create habitat cascades and affect the local epifaunal. Nevertheless, in […]

PNZ6 – Effects of habitat cascade on the secondary production in rocky intertidal seaweeds-dominated systems

This project, finally, described how habitat cascades (the same described in the previous project) can affect the secondary production in rocky shore systems. Compared to all the previous projects, where classical community descriptors (such as abundance, richness and community structure) were considered, here I estimated the secondary production as function of epifaunal body biomass and […]

Paper: “Recreational diving and its effects on the macroalgal communities of the unintentional artificial reef Zenobia shipwreck (Cyprus)”

Siciliano Alfonso, Jimenez Carlos, Antonis Petrou X Abstract The ecological role of shipwrecks as artificial reefs is well established and often is prime and exclusive destinations for diving tourism. But they are also extremely delicate and sensitive environments. For this reason, the impact of recreational diving on shipwrecks should be taken in consideration since diver’s […]

Conference: “Effects of seaweeds, nutrients and sedimentation on seagrass and seagrass-associated fauna”

Annual Biology Conference (ABC) 2016, University of Canterbury, New Zealand Alfonso Siciliano, Mads S. Thomsen, David R. Schiel X Abstract Seagrasses are marine plants that take up nutrients, stabilize sediments, increase habitat complexity and thereby also increase biodiversity of sedimentary coastal ecosystems. Seagrasses also facilitate seaweeds that can become entangled around seagrass leaves and stems. However, […]