From ecological functions to ecosystem services: linking coastal lagoons biodiversity with human well-being

Hydrobiologia, Год журнала: 2023, Номер 850(12-13), С. 2611 - 2653

Опубликована: Март 10, 2023

Язык: Английский

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Nutrient overload promotes the transition from top-down to bottom-up control and triggers dystrophic crises in a Mediterranean coastal lagoon

The Science of The Total Environment, Год журнала: 2022, Номер 846, С. 157388 - 157388

Опубликована: Июль 15, 2022

The excess input of nutrients that triggers eutrophication processes is one the main destabilizing factors coastal ecosystems, being lagoons prone to suffer these effects and present dystrophic crises. This process aggravated by current trend rising temperatures more frequent torrential rains due climate change. We observed Mar Menor lagoon had a great capacity for self-regulation its trophic web resistance process, but after 30 years nutrient change in agricultural regime drainage basin 1990s, ecosystem has suffered several events. In this work, we characterize seasonal dynamic pelagic system during last Phosphorus nitrogen alternate as limiting phytoplankton proliferation. entrance phosphorus mainly related vacation periods, while inputs, both superficial sub-superficial, are chronic high nitrates concentration water table activities carried out area changed. Our analysis reveals summer season periodical hypoxia events when N/P ratio decreases, temperature rises. Menor, ecological balance been maintained recent decades thanks to, among other mechanisms, spatial temporal segregation top-down control over exerted three species jellyfish. However, deep reduction abundance jellyfish excessive proliferation meant loss control. Moreover, have registered decline all zooplanktonic groups suggest management actions should address sources nutrients, an integrated throughout watershed.

Язык: Английский

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Synoptic Spatio-Temporal Variability of the Photosynthetic Productivity of Microphytobenthos and Phytoplankton in a Tidal Estuary

Frontiers in Marine Science, Год журнала: 2020, Номер 7

Опубликована: Март 24, 2020

Tidal estuaries are regarded as highly important ecosystems, mostly due to their high primary productivity and associated role carbon sinks. In these is mainly the photosynthetic fixation by phytoplankton microphytobenthos. The of two communities has been studied separately, directly comparable estimates rates in same estuary relatively scarce. present study aimed characterize spatio-temporal variability microphytobenthos a tidal estuary, Ria de Aveiro (Portugal), estimate annual ecosystem-level budget for communities. Productivity were determined based on synoptic situ measurements absolute electron transport rate photosystem II, using PAM fluorometry. Chlorophyll fluorescence indices accompanied salinity, temperature, water turbidity, solar irradiance, planktonic benthic microalgal biomass. Measurements carried out hourly, along four spring-neap cycles distributed one year, three sites estuary. most pronounced trends photophysiology following: (i) maximum biomass reached later (summer-autumn) than (spring-summer); (ii) absorption cross-section PSII was generally higher phytoplankton; (iii) groups showed similar photoacclimation state, but appeared light-acclimated when compared phytoplankton. Biomass-specific average microphytobenthos, averaging 68.0 19.1 mg C Chl a-1 d-1, respectively. However, areal depth-integrated production phytoplankton, 264.5 140.0 m-2 On an basis, averaged 49.9 g yr-1 while 105.2 yr-1. When upscaling whole 4894.3 7534.0 t yr-1, respectively, representing 39.4% 60.6% combined total 12428.3 Aveiro.

Язык: Английский

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Ecosystem-based management planning across aquatic realms at the Ria de Aveiro Natura 2000 territory

The Science of The Total Environment, Год журнала: 2018, Номер 650, С. 1898 - 1912

Опубликована: Сен. 25, 2018

Ria de Aveiro represents a coastal territory, in which its natural capital, mostly classified under Natura 2000 network of protected areas, is paramount importance for the regional and national economy, supporting harbour activities maritime traffic, agriculture, commercial fisheries, aquaculture, manufacturing, tourism, sports recreational activities. Current foreseen changes connected to human activities, namely land water uses potential conflicts, frame environmental policies, sustainable economic development well-being require implementation ecosystem-based management (EBM) planning processes considering connectivity across marine, transitional, freshwater, terrestrial domains. The main objective elaborate on co-development EBM process three domains, all characterized by high biodiversity wide range services provided ecosystems their abiotic components, mitigation impacts from plan implementation. approach used follows stepwise procedure resilience principles, analysis relationship between social ecological components how these can be through risk assessment spatial multi-criteria based delivery ecosystem services. Stakeholders' perception matched provisioning supported response that consist saltmarshes seagrasses meadows restoration programs. Compliance proposed measures achievable regarding policies (policy targets policy instruments) feasibility (scientific technological knowledge financial resources). support Vouga estuary smart specialization (RIS3 Centro).

Язык: Английский

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Ecotrophic perspective in fisheries management: a review of Ecopath with Ecosim models in European marine ecosystems

Frontiers in Marine Science, Год журнала: 2023, Номер 10

Опубликована: Май 2, 2023

The aim of this work is to present the food web models developed using Ecopath with Ecosim (EwE) software tool describe structure and functioning various European marine ecosystems (eastern, central western Mediterranean Sea; Black Bay Biscay, Celtic Sea Iberian coast; Baltic North English Channel, Irish west Scottish Norwegian Barents Seas). A total 195 based on 168 scientific publications, which report original, updated modified versions, were reviewed. Seventy included temporal simulations while 28 implemented Ecospace spatiotemporal dynamics. Most publications referred followed by sub-regions. In Sea, region had largest number eastern regions; similar trends observed in previous literature reviews. addressed ecosystem fisheries-related hypotheses several investigated impact climate change, presence alien species, aquaculture, chemical pollution, infrastructure, energy production. Model complexity (i.e., functional groups) increased over time. Main forcing factors considered run spatial trophic interactions, fishery, primary Average scores indicators derived from summary statistics compared. Uncertainty was also use Ecosampler plug-in Monte Carlo routine; only one third reviewed incorporated uncertainty analysis. Only a limited ECOIND provides user quantitative output ecological indicators. We assert that EwE modelling approach successful framework analyse dynamics ecosystems, evaluate potential impacts different management scenarios.

Язык: Английский

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Food web structure and ecosystem attributes of integrated multi-trophic aquaculture waters in Sanggou Bay

Aquaculture Reports, Год журнала: 2020, Номер 16, С. 100279 - 100279

Опубликована: Фев. 13, 2020

Sanggou Bay is well known as an exemplary coastal water of Integrated Multi-Trophic Aquaculture (IMTA). IMTA practiced in China highly ecologically efficient, through the combination extractive and fed species. In this paper, Ecopath model was used to study food web structure function ecosystem. According model, ecosystem ranged from 1.00–3.89 trophic level. dominated by low levels, which aggregated level I II (TL TL II). contributed 83.64 % 16.36 biomass. species (kelp, oyster, scallop abalone) were all II, together accounted for 97.30 biomass functional groups. Kelp 81.12 total Transfer efficiency 10.85 %. harvest had a positive influence on scallop, oyster kelp, but negative abalone. All groups self-impacts, that could be interpreted intraspecific competition resources. Oyster, abalone showed impacts each other. From system properties, connectance index (CI) 0.26 omnivory (SOI) 0.08, these suggested influenced human activities. The ratio production respiration (P/R) 3.57, much more than respiration. This presented way minimize disturbance aquaculture protect improve economic benefits stakeholders. paper may provide reference research management waters.

Язык: Английский

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How the fishing effort control and environmental changes affect the sustainability of a tropical shrimp small scale fishery

Fisheries Research, Год журнала: 2020, Номер 235, С. 105824 - 105824

Опубликована: Дек. 1, 2020

Язык: Английский

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Using seagrass as a nature-based solution: Short-term effects of Zostera noltei transplant in benthic communities of a European Atlantic coastal lagoon

Marine Pollution Bulletin, Год журнала: 2023, Номер 197, С. 115762 - 115762

Опубликована: Ноя. 16, 2023

Seagrass meadows provide several ecological functions that improve the overall health of coastal systems and therefore, it is urgent to promote restoration such habitats. In Ria de Aveiro, a lagoon in Atlantic Coast Portugal, initiative was responsible for transplanting dwarf eelgrass Zostera noltei into highly degraded area. This used as nature-based solution (NbS) mitigate some impacts historical mercury contamination. Comparisons key-species features (density biomass), community-derived indicators (total density biomass, species richness Shannon-Wiener index) between transplanted seagrass patch, their bare vicinities, counterpart habitats on source area, provided signs effectiveness action benthic communities' recovery. Indicators were higher within restored meadow, biomass derived meadow similar meadow.

Язык: Английский

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Effect of Nutrient Enrichment and Turbidity on Interactions Between Microphytobenthos and a Key Bivalve: Implications for Higher Trophic Levels

Frontiers in Marine Science, Год журнала: 2020, Номер 7

Опубликована: Авг. 20, 2020

Benthic diatoms are a high-quality food resource providing essential fatty acids to benthic grazers. Different stressors may alter the proportion of and other microalgae thus can affect quality as well quantity available consumers. Microphytobenthos (MPB) lipid biomarkers were assessed in field experiment elucidate changes biosynthesis (FA) under nitrogen (N) enrichment (three levels) at eight intertidal sites that spanned turbidity gradient. Influences on flow carbon energy determined using FA functionally important deposit-feeding tellinid bivalve (Macomona liliana). Site-specific effects N detected MPB measurements. Enrichment generally increased biomass (chl a) across all sites, while diatom associated acid was more variable some sites. Analysis sediment environmental variables suggested microbial community composition related water clarity mud content bed. The ability utilize nitrogen, indicated by use efficiency index, also important. Despite increase biomass, reserves tissue M. liliana, primary consumer MPB, reduced (by up 6 orders magnitude) medium high addition plots compared control plots. Further, nutritional bivalves higher trophic levels (indicated lower ratio FAs (ω3:ω6)) treatment suggesting adversely affected nutrient but not due reduction availability. This study suggests anthropogenic indirectly structure function web, terms ecosystem productivity. change interactions between key suspended concentrations continue globally. has implications for various functions mediated these interactions, such cycling secondary production.

Язык: Английский

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Light niche construction: Motility of sediment-inhabiting diatoms determines the experienced light environment

Ecological Modelling, Год журнала: 2023, Номер 481, С. 110379 - 110379

Опубликована: Апрель 12, 2023

Diatoms are an extraordinarily diverse, evolutionarily successful, and ecologically important group of single-cell algae. the pennates particularly in estuarine sedimentary habitats, where they form highly productive microphytobenthos communities that cover extensive areas intertidal flats. The capable directed motility, evolutionary unique trait amongst diatoms, which has long been hypothesized to confer a critical adaptive advantage, by enabling these cells vertically migrate within photic zone sediment behaviorally regulate light exposure. This study investigated role diatom motility on active regulation exposure developing model quantitatively characterize compare experienced environment individual two life forms pennate diatoms inhabit sediments: epipelic species, motile dominant fine sediments, epipsammic non-motile or slowly cells, colonize coarser sediments. conceptual framework was based identification parameterization main controlling factors regime perceived inhabiting types environments: (i) solar irradiance incident at surface, determined superimposition tidal cycle day-night cycle; (ii) attenuation sediment; (iii) mixing currents bioturbation, repositioning column; (iv) cell velocity, as function intensity photoacclimation state determines their photosynthetic preferences. run for realistic scenarios published ecological, photophysiological cellular data (light attenuation, depth, photosynthesis light-response curves, velocity), simulating variation vertical position due migration level it is exposed each moment. results confirm hypothesis experience significantly different environment. Vertical enables species much less variable regime, with increased mean daily doses received. In contrast, more unstable environment, including frequent supersaturating levels periods prolonged darkness. These have ecological significance, support value light-driven optimizing growth, identify niche-construction activity, allowing through habitat selection.

Язык: Английский

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