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  • 1
    Book
    Book
    European seagrasses: an introduction to monitoring and management (2004)
    [S. l.] : The M&MS project
    Details Availability
    Type of Medium: Book
    Pages: VII, 88 S , Ill
    ISBN: 8789143213
    URL: http://www.seagrasses.org/handbook/european_seagrasses_low.pdf
    Language: English
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  • 2
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    Stable Isotope (δ13C, δ15N, δ18O,δD) composition and nutrient concentration of Red Sea primary producers (2018)
    PANGAEA
    In:  Supplement to: Duarte, Carlos Manuel; Delgado-Huertas, Antonio; Anton, Andrea; Carrillo-de-Albornoz, Paloma; López-Sandoval, Daffne C; Agustí, Susana; Almahasheer, Hanan; Marbà, Núria; Hendriks, Iris; Krause-Jensen, Dorte; Garcias-Bonet, Neus (2018): Stable isotope (δ13C, δ15N, δ18O, δD) composition and nutrient concentration of Red Sea primary producers. Frontiers in Marine Science, 5, https://doi.org/10.3389/fmars.2018.00298
    Details
    Publication Date: 2023-01-13
    Description: Data of stable isotope composition (δ13C, δ15N, δD, δ18O) and nutrient concentration (%N and %C) of primary producers (halophytes, macroalgae, mangroves, seagrasses, and seston) in the Red Sea
    Keywords: 1; 10; 11; 12; 13; 14; 15; 16; 17; 18; 19; 2; 20; 21; 22; 23; 24; 25; 26; 27; 28; 29; 3; 30; 31; 32; 33; 34; 35; 36; 37; 38; 39; 4; 40; 41; 42; 43; 44; 45; 46; 47; 48; 49; 5; 50; 51; 52; 53; 54; 55; 56; 57; 58; 59; 6; 60; 61; 62; 63; 64; 65; 66; 67; 68; 69; 7; 70; 71; 72; 73; 74; 75; 76; 77; 78; 79; 8; 80; 81; 82; 83; 84; 85; 86; 87; 88; 89; 9; 90; 91; 92; 93; Al Azizi; Al-Azizi-CCF-spring; C10-16; C1-16; C1-17; C2-17; C3-16; C4-16; C4-17; C5-16; C5-17; C6-16; C6-17; C7-16; C7-17; C8-16; C8-17; C9-16; C9-17; Carbon, organic, total; Carbon/Nitrogen ratio; CCF0602; CCF0702; CCF0808; CCF0902; CCF1002; CCF2ALR1; CCF2ALR2; CCF2AWR1; CCF2AWR2; CCF2DR1; CCF2DR2; CCF2DS1; CCF2THR3; CCF2THS1; CCF2YBR2; CCF2YBR3; CCF2YBS1; CCFALR1; CCFALR2; CCFALR3; CCFALS1; CCFAWR1; CCFAWR3; CCF Benthic Cruise Summer 2017; CCF Benthic Cruise Winter 2017; CCFDR1; CCFDR2; CCFDS1; CCF Pelagic Cruise Spring 2017; CCFTHR1; CCFTHS1; CCFYBR1; CCFYBR2; CCFYBS1; Economic_city-M; Economic_city-S; Economic_city-Sa; Event label; Habitat; Identification; Khor_Alkharar-M; Khor_Alkharar-S; Khor_Alkharar-Sa; Latitude of event; Longitude of event; M1-16; M1-17; M2-16; M2-17; M3-16; M3-17; M4-16; M4-17; M5-16; M5-17; M6-16; M7-16; Macrophytes; MULT; Multiple investigations; Nitrogen, organic; Pelagic_Station; Petro_Rabigh-M; Petro_Rabigh-S; Red Sea; Red Sea Seagrass and Mangrove Surveys 2016; Red Sea Seagrass and Mangrove Surveys 2017; S10-16; S10-17; S11-16; S11-17; S1-16; S1-17; S12-16; S2-16; S2-17; S3-16; S3-17; S4-16; S4-17; S5-16; S5-17; S6-16; S6-17; S7-16; S8-16; S8-17; S9-16; S9-17; Taxon/taxa; Thuwal_Island-M; Thuwal_Island-S; Thuwal 2438; Thuwal-CCF-summer; Thuwal-CCF-winter; Thuwal-Macrophytes-17; Thuwal-Seagrass-16; δ13C; δ15N; δ18O; δ Deuterium
    Type: Dataset
    Format: text/tab-separated-values, 5645 data points
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    DATA PANGAEA
  • 3
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    Data set on carbon and nitrogen concentrations, stocks, and isotopic composition in Red Sea seagrass and mangrove sediments (2018)
    PANGAEA
    In:  Supplement to: Garcias-Bonet, Neus; Delgado Huertas, Antonio; Carrillo-de-Albornoz, Paloma; Anton, Andrea; Almahasheer, Hanan; Marbà, Núria; Hendriks, Iris; Krause-Jensen, Dorte; Duarte, Carlos Manuel (2019): Carbon and nitrogen concentrations, stocks, and isotopic compositions in Red Sea seagrass and mangrove sediments. Frontiers in Marine Science, 6, 267, https://doi.org/10.3389/fmars.2019.00267
    Details
    Publication Date: 2023-02-08
    Description: Data on carbon and nitrogen stocks and stable isotope composition (δ13C, δ15N) in Red Sea seagrass and mangrove sediments
    Keywords: 10; 12; 14; 15; 17; 19; 2; 25; 28; 29; 30; 35; 4; 46; 49; 5; 57; 59; 60; 62; 64; 65; 69; 7; 71; 73; 74; 76; 78; 79; 83; 88; 90; 91; 93; Calcium carbonate; Carbon, inorganic, total; Carbon, inorganic stock; Carbon, organic, per unit sediment mass; Carbon, organic, total; Carbon, organic stock; Carbon/Nitrogen ratio; CCF2DS1; CCF2THS1; CCF2YBS1; CCF Benthic Cruise Summer 2017; Cruise/expedition; Density, wet bulk; Depth, bottom/max; DEPTH, sediment/rock; Depth, top/min; Economic_city; Economic_city-1; Economic_city-2; Economic_city-3; Event label; Habitat; Khor_Alkarar; Khor_Alkarar-1; Khor_Alkarar-2; Khor_Alkarar-3; M1-16; M1-17; M2-16; M2-17; M3-16; M3-17; M4-16; M4-17; M5-16; M5-17; M6-16; M7-16; Macrophytes; mangrove ecosystems; marine sediments; MULT; Multiple investigations; Nitrogen, per unit sediment mass; Nitrogen, total; Nitrogen stock; Petro_Rabigh; Red Sea; Red Sea Seagrass and Mangrove Surveys 2016; Red Sea Seagrass and Mangrove Surveys 2017; Replicate; S10-16; S10-17; S11-16; S1-16; S1-17; S12-16; S2-16; S2-17; S3-16; S3-17; S4-16; S4-17; S5-16; S5-17; S6-16; S6-17; S7-16; S8-16; S9-16; S9-17; Sample code/label; seagrass ecosystems; Taxon/taxa; Thuwal; Thuwal 2438; Thuwal-CCF-summer; Thuwal-Macrophytes-17; Thuwal-Seagrass-16; δ13C, organic carbon; δ15N, bulk sediment
    Type: Dataset
    Format: text/tab-separated-values, 7601 data points
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    DATA PANGAEA
  • 4
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    Global ecological impacts of marine exotic species (2019)
    PANGAEA
    Details
    Publication Date: 2023-08-12
    Type: Dataset
    Format: text/csv, 195.5 kBytes
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    DATA PANGAEA
  • 5
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    Seawater carbonate chemistry and carbonate load of seagrass leaves (2019)
    PANGAEA
    Details
    Publication Date: 2024-03-15
    Description: Seagrass meadows play a significant role in the formation of carbonate sediments, serving as a substrate for carbonate-producing epiphyte communities. The magnitude of the epiphyte load depends on plant structural and physiological parameters, related to the time available for epiphyte colonization. Yet, the carbonate accumulation is likely to also depend on the carbonate saturation state of seawater (Omega) that tends to decrease as latitude increases due to decreasing temperature and salinity. A decrease in carbonate accumulation with increasing latitude has already been demonstrated for other carbonate producing communities. The aim of this study was to assess whether there was any correlation between latitude and the epiphyte carbonate load and net carbonate production rate on seagrass leaves. Shoots from 8 different meadows of the Zostera genus distributed across a broad latitudinal range (27 °S to up to 64 °N) were sampled along with measurements of temperature and Omega. The Omega within meadows significantly decreased as latitude increased and temperature decreased. The mean carbonate content and load on seagrass leaves ranged from 17 % DW to 36 % DW and 0.4-2.3 mg CO3/cm**2, respectively, and the associated mean carbonate net production rate varied from 0.007 to 0.9 mg CO3/cm**2/d. Mean carbonate load and net production rates decreased from subtropical and tropical, warmer regions towards subpolar latitudes, consistent with the decrease in Omega. These results point to a latitudinal variation in the contribution of seagrass to the accumulation of carbonates in their sediments which affect important processes occurring in seagrass meadows, such as nutrient cycling, carbon sequestration and sediment accretion.
    Keywords: Alkalinity, total; Alkalinity, total, standard deviation; Aragonite saturation state; Aragonite saturation state, standard deviation; Benthos; Bicarbonate ion; Calcification/Dissolution; Calcification rate; Calcite saturation state; Calcite saturation state, standard deviation; Calculated using seacarb after Nisumaa et al. (2010); Carbon, inorganic, dissolved; Carbon, inorganic, dissolved, standard deviation; Carbonate ion; Carbonate mass per shoot; Carbonate system computation flag; Carbon dioxide; Coast and continental shelf; Dragor_Strand; Event label; EXP; Experiment; Field observation; Fugacity of carbon dioxide (water) at sea surface temperature (wet air); Growth/Morphology; Heterozostera tasmanica; Indian Ocean; Kobbefjord; LATITUDE; LONGITUDE; Mass per shoot; Moreton_Bay_OA; Nefyn; North Atlantic; Number of leaves; OA-ICC; Ocean Acidification International Coordination Centre; Partial pressure of carbon dioxide (water) at sea surface temperature (wet air); pH; pH, standard deviation; Plantae; Registration number of species; Replicates; Ria_Formosa_OA; Rottnest_Island_OA; Salinity; Salinity, standard deviation; Santander_OA; Seagrass; Shoots; Single species; Site; Skaering_Strand; South Pacific; Species; Surface area; Temperate; Temperature, water; Temperature, water, standard deviation; Tracheophyta; Type; Uniform resource locator/link to reference; Zostera capricorni; Zostera marina
    Type: Dataset
    Format: text/tab-separated-values, 2839 data points
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    DATA PANGAEA
  • 6
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    Seawater carbonate chemistry and oxygen concentrations in the Greenland tidal pools (2018)
    PANGAEA
    In:  Supplement to: Duarte, Carlos Manuel; Krause-Jensen, Dorte (2018): Greenland Tidal Pools as Hot Spots for Ecosystem Metabolism and Calcification. Estuaries and Coasts, 41(5), 1314-1321, https://doi.org/10.1007/s12237-018-0368-9
    Details
    Publication Date: 2024-03-15
    Description: The hypothesis that Arctic tidal pools provide environmental conditions suitable for calcifiers during summer, thereby potentially providing refugia for calcifiers in an acidifying Arctic Ocean, was tested on the basis of measurements conducted during two midsummers (2014 and 2016) in tidal pools colonised by a community composed of macroalgae and calcifiers in Disko Bay, Greenland (69° N). The tidal pools exhibited steep diurnal variations in temperature from a minimum of about 6 °C during the night to a maximum of almost 18 °C in the afternoon, while the temperature of the surrounding shore water was much lower, typically in the range 3 to 8 °C. O2 concentrations in the tidal pools were elevated relative to those in the adjacent open waters, by up to 11 mg O2 L−1, and exhibited heavy super-saturation (up to 〉 240%) during daytime emersion, reflecting intense and sustained photosynthetic rates of the tidal macroalgae. The intense photosynthetic activity of the seaweeds resulted in the drawdown of pCO2 concentrations in the pools during the day to levels down to average (±SE) values of 66 ± 18 ppm, and a minimum recorded value of 14.7 ppm, corresponding to pH levels as high as 8.69 ± 0.08, as compared to CO2 levels of 256 ± 4 and pH levels of 8.14 ± 0.01 in the water flooding the pools during high tide. The corresponding Ωarag reached 5.04 ± 0.49 in the pools as compared to 1.55 ± 0.02 in the coastal waters flooding the pools. Net calcification averaged 9.6 ± 5.6 μmol C/kg/h and was strongly and positively correlated with calculated net ecosystem production rates, which averaged 27.5 ± 8.6 μmol C/kg/h. Arctic tidal pools promote intense metabolism, creating conditions suitable for calcification during the Arctic summer, and can, therefore, provide refugia from ocean acidification to vulnerable calcifiers as extended periods of continuous light during summer are conducive to suitable conditions twice a day. Meroplankton larvae are exposed to ocean acidification until they settle in vegetated tidal pools, where they benefit from the protection offered by the “macroalgae-carbonate saturation state” interaction favouring calcification rates.
    Keywords: Alkalinity, total; Aragonite saturation state; Arctic; Arctic_Station; Benthos; Bicarbonate ion; Calcification/Dissolution; Calcite saturation state; Calculated using CO2SYS; Calculated using seacarb after Nisumaa et al. (2010); Carbon, inorganic, dissolved; Carbonate ion; Carbonate system computation flag; Carbon dioxide; Coast and continental shelf; Date; DATE/TIME; Duration; Entire community; Event label; EXP; Experiment; Field observation; Fortune_Bay; Fugacity of carbon dioxide (water) at sea surface temperature (wet air); Growth/Morphology; Kangarsuuk; Local Time; North Atlantic; OA-ICC; Ocean Acidification International Coordination Centre; Oxygen; Partial pressure of carbon dioxide (water) at sea surface temperature (wet air); pH; Polar; Primary production/Photosynthesis; Rocky-shore community; Salinity; Site; Temperature, water; Type
    Type: Dataset
    Format: text/tab-separated-values, 3351 data points
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    DATA PANGAEA
  • 7
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    The fundamental role of ecological feedback mechanisms for the adaptive management of seagrass ecosystems - a review (2016)
    Cambridge Philosophical Society
    In:  Biological Reviews, 92 (3). pp. 1521-1538.
    Details
    Publication Date: 2019-02-01
    Description: Seagrass meadows are vital ecosystems in coastal zones worldwide, but are also under global threat. One of the major hurdles restricting the success of seagrass conservation and restoration is our limited understanding of ecological feedback mechanisms. In these ecosystems, multiple, self‐reinforcing feedbacks can undermine conservation efforts by masking environmental impacts until the decline is precipitous, or alternatively they can inhibit seagrass recovery in spite of restoration efforts. However, no clear framework yet exists for identifying or dealing with feedbacks to improve the management of seagrass ecosystems. Here we review the causes and consequences of multiple feedbacks between seagrass and biotic and/or abiotic processes. We demonstrate how feedbacks have the potential to impose or reinforce regimes of either seagrass dominance or unvegetated substrate, and how the strength and importance of these feedbacks vary across environmental gradients. Although a myriad of feedbacks have now been identified, the co‐occurrence and likely interaction among feedbacks has largely been overlooked to date due to difficulties in analysis and detection. Here we take a fundamental step forward by modelling the interactions among two distinct above‐ and belowground feedbacks to demonstrate that interacting feedbacks are likely to be important for ecosystem resilience. On this basis, we propose a five‐step adaptive management plan to address feedback dynamics for effective conservation and restoration strategies. The management plan provides guidance to aid in the identification and prioritisation of likely feedbacks in different seagrass ecosystems.
    Type: Article , PeerReviewed
    Format: text
    DOI: 10.1111/brv.12294
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    OceanRep: Article in a Scientific Journal - peer-reviewed
  • 8
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    Distribution, structure and function of Nordic eelgrass (Zostera marina) ecosystems: implications for coastal management and conservation (2014)
    Wiley-Blackwell
    In:  Aquatic Conservation: Marine and Freshwater Ecosystems , 24 (3). pp. 410-434.
    Details
    Publication Date: 2016-09-06
    Description: This paper focuses on the marine foundation eelgrass species, Zostera marina, along a gradient from the northern Baltic Sea to the north-east Atlantic. This vast region supports a minimum of 1480 km2 eelgrass (maximum 〉2100 km2), which corresponds to more than four times the previously quantified area of eelgrass in Western Europe. Eelgrass meadows in the low salinity Baltic Sea support the highest diversity (4–6 spp.) of angiosperms overall, but eelgrass productivity is low (〈2 g dw m-2 d-1) and meadows are isolated and genetically impoverished. Higher salinity areas support monospecific meadows, with higher productivity (3–10 g dw m-2 d-1) and greater genetic connectivity. The salinity gradient further imposes functional differences in biodiversity and food webs, in particular a decline in number, but increase in biomass of mesograzers in the Baltic. Significant declines in eelgrass depth limits and areal cover are documented, particularly in regions experiencing high human pressure. The failure of eelgrass to re-establish itself in affected areas, despite nutrient reductions and improved water quality, signals complex recovery trajectories and calls for much greater conservation effort to protect existing meadows. The knowledge base for Nordic eelgrass meadows is broad and sufficient to establish monitoring objectives across nine national borders. Nevertheless, ensuring awareness of their vulnerability remains challenging. Given the areal extent of Nordic eelgrass systems and the ecosystem services they provide, it is crucial to further develop incentives for protecting them.
    Type: Article , PeerReviewed
    Format: text
    DOI: 10.1002/aqc.2424
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    OceanRep: Article in a Scientific Journal - peer-reviewed
  • 9
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    A Catalogue of Marine Biodiversity Indicators (2016)
    Frontiers
    In:  Frontiers in Marine Science, 3 (Art. Nr. 207).
    Details
    Publication Date: 2019-02-01
    Description: A Catalogue of Marine Biodiversity Indicators was developed with the aim of providing the basis for assessing the environmental status of the marine ecosystems. Useful for the implementation of the Marine Strategy Framework Directive (MSFD), this catalogue allows the navigation of a database of indicators mostly related to biological diversity, non-indigenous species, food webs, and seafloor integrity. Over 600 indicators were compiled, which were developed and used in the framework of different initiatives (e.g., EU policies, research projects) and in national and international contexts (e.g., Regional Seas Conventions, and assessments in non-European seas). The catalogue reflects the current scientific capability to address environmental assessment needs by providing a broad coverage of the most relevant indicators for marine biodiversity and ecosystem integrity. The available indicators are reviewed according to their typology, data requirements, development status, geographical coverage, relevance to habitats or biodiversity components, and related human pressures. Through this comprehensive overview, we discuss the potential of the current set of indicators in a wide range of contexts, from large-scale to local environmental programs, and we also address shortcomings in light of current needs. Developed by the DEVOTES Project, the catalogue is freely available through the DEVOTool software application, which provides browsing and query options for the associated metadata. The tool allows extraction of ranked indicator lists best fulfilling selected criteria, enabling users to search for suitable indicators to address a particular biodiversity component, ecosystem feature, habitat, or pressure in a marine area of interest. This tool is useful for EU Member States, Regional Sea Conventions, the European Commission, non-governmental organizations, managers, scientists, and any person interested in marine environmental assessment. It allows users to build, complement or adjust monitoring programs and has the potential to improve comparability and foster transfer of knowledge across marine regions.
    Type: Article , PeerReviewed
    Format: text
    DOI: 10.3389/fmars.2016.00207
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    OceanRep: Article in a Scientific Journal - peer-reviewed
  • 10
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    Assessing reference conditions according to the European water framework directive using modelling and analysis of historical data: an example from Randers Fjord, Denmark (2003)
    Springer
    In:  AMBIO: A Journal of the Human Environment, 32 (4). pp. 287-294.
    Details
    Publication Date: 2019-04-03
    Description: The European Water Framework Directive (WFD) requires the definition of reference conditions, i.e. pristine conditions, for all surface waters. As the present state of Danish coastal waters cannot be referred to as pristine, reference conditions have to be assessed by analysis of historical data or by the use of models. Using Randers Fjord as an example, the aim of this work was i) to demonstrate possibilities and restrictions of assessing reference conditions by historical data and by modelling; and ii) to demonstrate how ecological conditions have changed along with eutrophication. The ample historical data from Randers Fjord allowed us to assess reference conditions with respect to benthic macrophytes and benthic fauna. Models of varying complexity enabled us to assess reference conditions for nutrients, chlorophyll a, Secchi depth, and eelgrass. We conclude that models can be a useful supplement to assess reference conditions, though they are presently restricted by the lack of quantitative links between eutrophication and species composition.
    Type: Article , PeerReviewed
    Format: text
    DOI: 10.1579/0044-7447-32.4.287
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    OceanRep: Article in a Scientific Journal - peer-reviewed
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