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Citations since 2016
16 Research Items
I am a Senior Freshwater and Marine Ecologist at Wildlands Consultants Ltd., covering issues in both aspects of aquatic ecology. I am specialized in community ecology, anthropogenic impact assessments, drone surveys, underwater photography, scientific diving, ecological assessments and monitoring.
November 2016 - June 2020
Habitat heterogeneity is considered a primary causal driver underpinning patterns of diversity, yet the universal role of heterogeneity in structuring biodiversity is unclear due to a lack of coordinated experiments testing its effects across geographic scales and habitat types. Furthermore, key species interactions that can enhance heterogeneity,...
Large scale disturbances associated with anthropogenic activities or natural disasters can destroy primary habitat-forming species like corals, seagrasses and seaweeds. However, little research has documented if and on how large-scale disturbances affect secondary habitat formers, such as epiphytes and small animals that depend on biogenic habitats...
Recent research has shown that co-occurring primary and secondary habitat-forming species typically support higher biodiversity than do monocultures of the primary habitat-former alone. However, these ‘habitat cascades’ may not be universal and it is important to know whether, when and where positive effects on biodiversity from secondary habitat-...
The important role of indirect facilitation, like trophic cascade and keystone predation, in structuring communities have been documented over many decades and across ecosystems. By contrast, indirect facilitation mediated by habitat cascades (where ‘inhabitants’ organisms are facilitated through sequential habitat formation or modification) is les...
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 experience can strongly affect th...
eagrasses 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, relatively little is known about interactions between entangled seawee...
Many studies have documented habitat cascades where two co-occurring habitat-forming species control biodiversity. However, more than two habitat-formers could theoretically co-occur. We here documented a sixth-level habitat cascade from the Avon-Heathcote Estuary, New Zealand, by correlating counts of attached inhabitants to the size and accumulat...
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 secondary habitat to epibiontic invertebrates, giving rise to habitat cascades. Here we hypo...
It is well-established that habitat-forming host-species characterized by widely different form-functional traits affect epiphytes and faunal community differently. However, the opposite hypothesis, that form-functionally similar habitat-forming hosts have similar effects on epiphytes and fauna, has been studied much less. We used a survey and two...
It is well established that host species that are morphologically and genetically different can support different epibiotic species, and that these differences can support different invertebrate communities. However, no studies have tested the opposite hypothesis of whether morphologically similar congeneric hosts support similar epibiota and have...
It is well established that host species that are morphologically and genetically different can support different epibiotic species, and that these differences can facilitate different invertebrate communities. However, no studies have tested the opposite hypothesis of whether morphologically similar congeneric hosts support similar epibiota and ha...
Artificial reefs represent effective ecosystems for restocking but they are also extremely delicate and sensitive environments because they represent hotspots for tourists. For this reason the impact of recreational diving on artificial reefs should be taken in consideration since inexpert divers and photographers can strongly affect benthic commun...
In the last few years, monitoring the health of aquatic environments subject to the impact of several human activities has led to the adoption of Teleosts as indicators of environmental changes. Fish are excellent bioindicators of aquatic ecosystems due to their high sensitivity to changes. It has been widely shown that exposure to genotoxic agents...
I'm running PERMANOVA analysis for a habitat experiment in which I'm transplanting epiphytes (living and mimic) in some hosts. The factorial design is:
3 densities (0, Low, High) x 2 epiphyte type (Mimic vs Living epiphyte).
Logically my samples should be 6 (with a double sample 0 due to the 0 density) but... statistically talking in the spreadsheet I cannot leave black cells for factors so I'm contrained on considering 3 epiphyte levels adding the 0 level (0, Mimic, Living)... so that I finally have a 3x3 design with 9 samples:
4 of which (0Mimic, 0Living, Low0, High0) are repeated samples of the first one.
I've doubt on the validity of this analysis (even because the software automatically expects 9 samples) or maybe there's something I don't know on how working with the black cells for factor columns?
Thank you very much
After the recent implementation of a Vaki Riverwatcher in order to monitor the trout population in the Taupo Fishery (New Zealand), we aim to: 1) characterizing the typical morphology of rainbow and brown trout from the Taupo recreational fishery; 2) providing new insights for the estimation of length (and potentially weight), with a high degree of accuracy, for rainbow and brown trout based on the height of the fish and morphological indices.
(1) the presence of a secondary habitat former on the seagrass bed has a relevant role in controlling habitat cascades in soft-bottom estuaries; (2) these habitat cascades occur over a wide range of spatio-temporal conditions, across latitudes, estuaries, seasons; (3) the secondary habitat former biomass and ‘type’ (living vs mimic) control abundance and biodiversity of invertebrates; (4) the invertebrates’ communities and habitat cascades associated with morphologically different secondary habitat former mimics are different across latitudes.
(1) congeneric Cystophora species support similar epifaunal community, i.e. they provide similar secondary productions (2) the presence of epiphytes on Cystophora spp. increases the secondary production as a result of a higher abundance of invertebrates (3) similar results are consistent across latitudes; northern locations are more likely to provide higher secondary productions compared to the southern ones (4) similar results are consistent across seasons and warm season productivity exceeds the cold season productivity (5) different epiphyte types (living vs artificial mimic) strongly affect the secondary production.