Distribution and functional traits of polychaetes in a CO2 vent system: winners and losers among closely related species

Gambi, María Cristina; Musco, Luigi; Giangrande, Adriana; Badalamenti, Fabio; Micheli, Fiorenza; Kroeker, Kristy J.

doi:10.3354/meps11727

Cited by 52 publications

(27 citation statements)

References 57 publications

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“…This scarcity of carnivores at elevated CO 2 is consistent with previous observations (e.g. polychaetes 42 ) in which elevated CO 2 was related to greater abundance of herbivores and detritivores. Functional analysis of motile macroinvertebrates in seagrasses reveals a reduction in epiphyte biomass and leaf canopy height under elevated CO 2 , due to intense fish grazing 43 .…”

Section: Discussionsupporting

confidence: 92%

Ocean acidification as a driver of community simplification via the collapse of higher-order and rise of lower-order consumers

Vizzini

Martínez-Crego²,

Andolina

et al. 2017

Sci Rep

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Increasing oceanic uptake of CO2 is predicted to drive ecological change as both a resource (i.e. CO2 enrichment on primary producers) and stressor (i.e. lower pH on consumers). We use the natural ecological complexity of a CO2 vent (i.e. a seagrass system) to assess the potential validity of conceptual models developed from laboratory and mesocosm research. Our observations suggest that the stressor-effect of CO2 enrichment combined with its resource-effect drives simplified food web structure of lower trophic diversity and shorter length. The transfer of CO2 enrichment from plants to herbivores through consumption (apparent resource-effect) was not compensated by predation, because carnivores failed to contain herbivore outbreaks. Instead, these higher-order consumers collapsed (apparent stressor-effect on carnivores) suggesting limited trophic propagation to predator populations. The dominance of primary producers and their lower-order consumers along with the loss of carnivores reflects the duality of intensifying ocean acidification acting both as resource-effect (i.e. bottom-up control) and stressor-effect (i.e. top-down control) to simplify community and trophic structure and function. This shifting balance between the propagation of resource enrichment and its consumption across trophic levels provides new insights into how the trophic dynamics might stabilize against or propagate future environmental change.

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Section: Discussionsupporting

confidence: 92%

Ocean acidification as a driver of community simplification via the collapse of higher-order and rise of lower-order consumers

Vizzini

Martínez-Crego²,

Andolina

et al. 2017

Sci Rep

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“…The polychaete species composition in this area is similar to that previously reported from other sites such as the Gulf of Tunis (Ayari & Afli, 2009), the north-eastern coast of Tunisia (Zaâbi & Afli, 2006;Ayari et al, 2009;Zaâbi et al, 2009Zaâbi et al, , 2010Zaâbi et al, , 2012 and in other Mediterranean soft-bottom communities (Dorgham et al, 2014). The species richness observed here is relatively high, considerably exceeding values previously mentioned elsewhere (Dorgham et al, 2014;Gambi et al, 2016) and could be due to the major sampling effort concerning 42 stations over two years.…”

Section: Discussionsupporting

confidence: 72%

Polychaete fauna from the intertidal zone of the Kneiss Islands (central Mediterranean Sea)

Mosbahi¹,

Dauvin²,

Neifar³

2017

Medit. Mar. Sci.

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The spatial and temporal distribution, abundance and assemblage structure of polychaete communities in the Kneiss Islands (central Mediterranean Sea) was studied at 42 stations selected among seagrass Zostera (Zosterella) noltei Hornemann meadows and unvegetated habitats sampled from April 2014 to January 2015. The Kneiss Islands represent a site of international interest in terms of their ornithological diversity (Important Bird Area, Ramsar Site and SPAMI). A total of 18,026 individuals and 92 species of polychaetes belonging to 25 families were identified. Analysis of the trophic structure reveals that the majority of stations are strongly dominated by deposit feeders (51.2%), followed by carnivores (34.8%) and suspension feeders (14%). Polychaete diversity and abundance were higher on the vegetated stations. Four polychaete assemblages are identified using MDS analysis. The distribution of polychaete assemblages are influenced by edaphic factors, particularly sediment structure and organic matter content. Seasonal variations of the polychaete community patterns at 20 stations show a maximum abundance and diversity during spring and summer and a minimum during winter. Seasonal fluctuations follow the seasonal variations of the environmental factors such as temperature and salinity, and correspond also to the lifestyle of the dominant species.

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“…, Gambi et al. ). Coastal marine ecosystems are simultaneously experiencing shifts in water temperature, pH, and dissolved oxygen (DO) due to climate change and eutrophication (Cai et al.…”

Section: Introductionmentioning

confidence: 99%

Community composition in mangrove ponds with pulsed hypoxic and acidified conditions

et al. 2017

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The potential resilience of biological communities to accelerating rates of global change has received considerable attention. We suggest that some shallow aquatic ecosystems, where temperature, dissolved oxygen (DO), and pH can exhibit extreme variation on short timescales of hours or days, provide an opportunity to develop a mechanistic understanding of species persistence and community assembly under harsh environmental conditions. Extreme diel swings in DO and pH have been observed in eutrophic temperate ecosystems, and here, we describe a similar phenomenon consistently occurring across tropical sites that included relatively remote atolls on the Meso‐American barrier reefs in Belize and oligotrophic coastal lagoons in Panama. In particular, we documented large daily swings in temperature, DO, and pH within shallow ponds of Caribbean mangrove forests. Water in seven of 13 ponds went hypoxic (<2 mg/L DO) during the multiday sampling period, and pH dipped nightly to low levels, falling below 7.0 in some ponds. Minimum pH and minimum DO were correlated, and showed a similar relationship in Belize and Panama, suggesting a common mechanism produced diel cycles. Remarkably, most ponds exhibited high abundance of macroalgae, macroinvertebrates, and fish, despite potentially stressful abiotic conditions. Although fish diversity was negatively correlated with pH range, our overall results from the ponds suggest that many species are sufficiently resistant such that a functionally complex community can persist in the midst of pulsed stressful conditions. We propose that the mangrove ponds could serve as a model ecosystem for investigating resistance and resilience of coastal marine communities to global change factors such as climate change, hypoxia, and ocean acidification.

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Distribution and functional traits of polychaetes in a CO2 vent system: winners and losers among closely related species

Cited by 52 publications

References 57 publications

Ocean acidification as a driver of community simplification via the collapse of higher-order and rise of lower-order consumers

Ocean acidification as a driver of community simplification via the collapse of higher-order and rise of lower-order consumers

Polychaete fauna from the intertidal zone of the Kneiss Islands (central Mediterranean Sea)

Community composition in mangrove ponds with pulsed hypoxic and acidified conditions

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