Impact of differential predation potential on eelgrass (Zostera marina) faunal community structure

Bologna, Paul A.X.

doi:10.1007/s10452-006-9059-x

Cited by 12 publications

(5 citation statements)

References 27 publications

(38 reference statements)

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“…Only few herbivorous and herbivorous-detritivorous species were detected in P. oceanica meadows, despite the large abundance of plant material available. In contrast, herbivorous and omnivorous fish are common in other seagrass communities [28,60,61,62], characterised by a larger variety of trophic levels. Most species were carnivorous, both macrophagic and microphagic, in accordance with the results obtained in French P. oceanica meadows [33].…”

Section: Discussionmentioning

confidence: 99%

“…Due to these spatial and temporal differences in the abundance of potential prey, the general assumption that fish represent important predators for selected invertebrates living in the leaf stratum of seagrasses [1,14,16] should be confirmed by direct data. The feeding behaviour of fish living within the leaf canopy of three P. oceanica meadows has been investigated in the present paper, through the analysis of their gut contents, to assess their role in the consumption of secondary production in two seasons and, therefore, the impact of fish predation [28] on invertebrate populations. Our major questions were: 1) Which is the trophic role played by fish in a range of P. oceanica meadows?…”

Section: Introductionmentioning

confidence: 99%

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Diet of fish populations in posidonia oceanica meadows off the Island of Ischia (Gulf of Naples, Italy):

Zupo¹,

Stübing²

2010

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The gut contents of fish in three Posidonia oceanica meadows off the island of Ischia (Bay of Naples, Italy) were investigated. A total of 926 individual fish belonging to 28 species was sampled by bottom trawl in the leaf canopy. Labridae, Pomacentridae, Scorpaenidae, and Serranidae were the best represented families (41%, 38%, 8% and 6% of the total number of individuals, respectively). Of the 94 taxa detected in the gut contents, 42 were identified to the species level. The most common food items were decapod crustaceans (15% of the gut contents, on average), copepods (13%), amphipods (14%), brown fragments of P. oceanica (6%), and ostracods (6%). The most abundant species of labridae, Symphodus ocellatus and S. rostratus, showed a broad spectrum of prey. This generalist feeding may positively influence their numerical abundance. Seasonal variations in the diets of fish, also at prey-species level, were demonstrated. The fish taxon plays essentially a macro-carnivore trophic role. In the investigated seagrass meadows the main trophic fluxes start from plant detritus, macrophyta, and microphyta (as primary producers) towards crustacean decapods, copepods, ostracods, and gammarid amphipods (as secondary producers) to fish. A low recycling rate (4%) within the fish community was observed. Larger fish predators (e.g., Sparidae), swimming over the leaf canopy, are the main exporters to adjacent coastal systems

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Diet of fish populations in posidonia oceanica meadows off the Island of Ischia (Gulf of Naples, Italy):

Zupo¹,

Stübing²

2010

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“…Syngnathidae are important in ecological, economical, medicinal and cultural terms. They live in corals, seagrasses, macroalgae, mangroves, estuaries, lagoons and open bottom habitats and can be important predators on bottom‐dwelling organisms (Tipton & Bell, 1988; Bologna, 2007). Subsistence fishers in some nations make a substantial portion of their annual income catching seahorses (Pajaro et al , 1998; Vincent et al , 2007) for use in ornamental display, curios and traditional medicine (Vincent, 1996; Parry‐Jones & Vincent, 1998; May & Tomoda, 2002; Alves & Rosa, 2006; Qian et al , 2008; Vincent et al , 2011).…”

Section: Introductionmentioning

confidence: 99%

Conservation and management of seahorses and other Syngnathidae

Vincent

Foster

Koldewey

2011

Journal of Fish Biology

244

233

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This article analyses the pressures on seahorses and explores conservation responses. It focuses on seahorses (Hippocampus spp.) but also considers pipefishes and seadragons, especially where they can fill gaps in seahorse knowledge. The charisma of many syngnathids can make them good flagship species for threats and solutions in marine conservation. The article combines a synthesis of published literature with new data on the trade in seahorses for traditional medicine, aquarium display and curiosities. Most traded seahorses come from trawl by-catch, although seahorses are also targeted. The total extraction is large, tens of millions of animals annually, and unsustainable. A first review of the effect of habitat change on syngnathids raises many questions, while suggesting that some species may cope better than others. The combination of pressures means that many species of syngnathid are now included in the IUCN Red List of Threatened Species or national equivalents. In addition, seahorse exports from 175 countries are limited to sustainable levels under the Convention on International Trade in Endangered Species (CITES) of Wild Fauna and Flora. Possible conservation measures include marine protected areas, fisheries management, select aquaculture ventures, trade regulation, improved governance (particularly) and consumer engagement.

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“…Their occurrence is affected by their tolerance to the variation of certain abiotic variables such as temperature, availability of oxygen, and the substrate. Seasonal fl uctuations in their abundance could be attributed to their life cycle and other factors such as selective predation and interspecifi c competition (Van Dolah 1978, Nicolaidou and Karakiri 1989, Sarda et al 1996, Wright et al 1996, Bologna 2007). Similar results have been reported for other Mediterranean lagoons (Nicolaidou et al 1985, 2006, Barnes 1994, Reizopoulou et al 1996, Cognetti and Maltagliati 2000, Koutsoubas et al 2000a, Mistri et al 2001b, Reizopoulou and Nicolaidou 2004).…”

Section: Discussionmentioning

confidence: 99%

Spatio-temporal variability of benthic macrofauna in a coastal lagoon assessed by ecological interaction networks

Paraskevopoulou¹,

Monokrousos²,

Kappas³

et al. 2015

Community Ecology

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An ecological survey of the benthic communities was carried out, at both spatial and temporal scales, in Papapouli Lagoon, the first ecotouristic park in Greece by applying for the first time, ecological network analysis. The application of ecological network analysis provided novel information on the quality of interactions among species, undetected by the most frequently used methods. The sorting of substrate samples enabled the identification and density determination of 40,036 individuals belonging to 31 different taxa, although, strong dominance of only a few species was observed. "Deposit feeders" were the dominant trophic group in all sampling sites and seasons while "suspension feeders" exhibited relatively the lowest abundance. The periodic opening of the sea inlet seems to be of crucial importance. In coastal lagoons, where there is constant communication with the sea, benthic fauna patterns seem to change according to the sea-land gradient. However, in intermittently closed lagoons, such as Papapouli Lagoon, a more homogenous pattern is evident. The obtained networks showed that when communication with the sea is interrupted all the benthic fauna patterns tend to be destabilized and centralized around one species, which in most cases is a "deposit feeder". When the inlet opens and communication with the sea is restored, the benthic composition seems to be more cohesive, especially in the most distant regions. Knowledge generated by network analysis should provide a valuable tool in order to assess potential environmental changes and assist management decisions.

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Impact of differential predation potential on eelgrass (Zostera marina) faunal community structure

Cited by 12 publications

References 27 publications

Diet of fish populations in posidonia oceanica meadows off the Island of Ischia (Gulf of Naples, Italy):

Diet of fish populations in posidonia oceanica meadows off the Island of Ischia (Gulf of Naples, Italy):

Conservation and management of seahorses and other Syngnathidae

Spatio-temporal variability of benthic macrofauna in a coastal lagoon assessed by ecological interaction networks

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