GLORIA

GEOMAR Library Ocean Research Information Access

X

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
  • 1
    Online Resource
    Online Resource
    Macrofauna communities across a seascape of seagrass meadows: environmental drivers, biodiversity patterns and conservation implications
    Springer Science and Business Media LLC ; 2021
    In:  Biodiversity and Conservation Vol. 30, No. 11 ( 2021-09), p. 3023-3043
    Details
    In: Biodiversity and Conservation, Springer Science and Business Media LLC, Vol. 30, No. 11 ( 2021-09), p. 3023-3043
    Abstract: Similar to other coastal biogenic habitats (e.g. tidal marshes, kelp forests, mangroves and coral reefs), a key function of seagrass meadows is the enhancement of biodiversity. Variability at multiple spatial scales is a driver of biodiversity, but our understanding of the response of macrofauna communities to variability of seagrass meadows is limited. We examined the macrofauna community structure (abundance and biomass) and diversity patterns (α- and β-diversity) across a seascape gradient of eleven seagrass meadows differing in the number, composition and density of plant species . The variability of the macrobenthic communities was regulated by a combination of sedimentary (mainly for the infauna) and macrophyte (mainly for the epifauna) predictors. We demonstrate that the natural occurrence of drifting algae trapped in the aboveground complexity of the meadows benefits seagrass macrofauna. Seagrass-associated macrofauna showed a clear increase in abundance and α-diversity metrics with increasing habitat complexity attributes (i.e. shoot density, plant biomass and canopy height). Furthermore, partitioning of β-diversity (i.e. the variation of species composition between sites) implied the replacement of some species by others between sites (i.e. spatial turnover) instead of a process of species loss (or gain) from site to site (i.e. nestedness). Therefore, the enhancement of macrofauna diversity across an increasing gradient of seagrass complexity, and the dominance of the turnover component suggest that devoting conservation efforts on many different types of meadows, including the less diverse, should be a priority for coastal habitat-management.
    Type of Medium: Online Resource
    ISSN: 0960-3115 , 1572-9710
    URL: Article
    DOI: 10.1007/s10531-021-02234-3
    Language: English
    Publisher: Springer Science and Business Media LLC
    Publication Date: 2021
    detail.hit.zdb_id: 2000787-5
    SSG: 12
    SSG: 23
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
  • 2
    Online Resource
    Online Resource
    Reach‐scale river metabolism across contrasting sub‐catchment geologies: Effect of light and hydrology
    Wiley ; 2017
    In:  Limnology and Oceanography Vol. 62, No. S1 ( 2017-11)
    Details
    In: Limnology and Oceanography, Wiley, Vol. 62, No. S1 ( 2017-11)
    Abstract: We investigated the seasonal dynamics of in‐stream metabolism at the reach scale (∼ 150 m) of headwaters across contrasting geological sub‐catchments: clay, Greensand, and Chalk of the upper River Avon (UK). Benthic metabolic activity was quantified by aquatic eddy co‐variance while water column activity was assessed by bottle incubations. Seasonal dynamics across reaches were specific for the three types of geologies. During the spring, all reaches were net autotrophic, with rates of up to 290 mmol C m −2 d −1 in the clay reach. During the remaining seasons, the clay and Greensand reaches were net heterotrophic, with peak oxygen consumption of 206 mmol m −2 d −1 during the autumn, while the Chalk reach was net heterotrophic only in winter. Overall, the water column alone still contributed to ∼ 25% of the annual respiration and primary production in all reaches. Net ecosystem metabolism (NEM) across seasons and reaches followed a general linear relationship with increasing stream light availability. Sub‐catchment specific NEM proved to be linearly related to the local hydrological connectivity, quantified as the ratio between base flow and stream discharge, and expressed on a timescale of 9 d on average. This timescale apparently represents the average period of hydrological imprint for carbon turnover within the reaches. Combining a general light response and sub‐catchment specific base flow ratio provided a robust functional relationship for predicting NEM at the reach scale. The novel approach proposed in this study can help facilitate spatial and temporal upscaling of riverine metabolism that may be applicable to a broader spectrum of catchments.
    Type of Medium: Online Resource
    ISSN: 0024-3590 , 1939-5590
    URL: Issue
    URL: Article
    DOI: 10.1002/lno.v62.S1
    DOI: 10.1002/lno.10619
    Language: English
    Publisher: Wiley
    Publication Date: 2017
    detail.hit.zdb_id: 2033191-5
    detail.hit.zdb_id: 412737-7
    SSG: 12
    SSG: 14
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
  • 3
    Online Resource
    Online Resource
    Positive contribution of macrofaunal biodiversity to secondary production and seagrass carbon metabolism
    Wiley ; 2022
    In:  Ecology Vol. 103, No. 4 ( 2022-04)
    Details
    In: Ecology, Wiley, Vol. 103, No. 4 ( 2022-04)
    Abstract: Coastal vegetated habitats such as seagrasses are known to play a critical role in carbon cycling and the potential to mitigate climate change, as blue carbon habitats have been repeatedly highlighted. However, little information is known about the role of associated macrofauna communities on the dynamics of critical processes of seagrass carbon metabolism (e.g., respiration, turnover, and production). We conducted a field study across a spatial gradient of seagrass meadows involving variable environmental conditions and macrobenthic diversity to investigate (1) the relationship between macrofauna biodiversity and secondary production (i.e., consumer incorporation of organic matter per time unit), and (2) the role of macrofauna communities in seagrass organic carbon metabolism (i.e., respiration and primary production). We show that, although several environmental factors influence secondary production, macrofauna biodiversity controls the range of local seagrass secondary production. We demonstrate that macrofauna respiration rates were responsible for almost 40% of the overall seafloor community respiration. Macrofauna represented on average 〉 25% of the total benthic organic C stocks, high secondary production that is likely to become available to upper trophic levels of the coastal food web. Our findings support the role of macrofauna biodiversity in maintaining productive ecosystems, implying that biodiversity loss due to ongoing environmental change yields less productive seagrass ecosystems. Therefore, the assessment of carbon dynamics in coastal habitats should include associated macrofauna biodiversity elements if we aim to obtain robust estimates of global carbon budgets required to implement management actions for the sustainable functioning of the world's coasts.
    Type of Medium: Online Resource
    ISSN: 0012-9658 , 1939-9170
    URL: Issue
    URL: Article
    DOI: 10.1002/ecy.v103.4
    DOI: 10.1002/ecy.3648
    RVK:
    WA 15000
    Language: English
    Publisher: Wiley
    Publication Date: 2022
    detail.hit.zdb_id: 1797-8
    detail.hit.zdb_id: 2010140-5
    SSG: 12
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
  • 4
    Online Resource
    Online Resource
    The influence of coring method on the preservation of sedimentary and biogeochemical features when sampling soft‐bottom, shallow coastal environments
    Wiley ; 2017
    In:  Limnology and Oceanography: Methods Vol. 15, No. 11 ( 2017-11), p. 905-915
    Details
    In: Limnology and Oceanography: Methods, Wiley, Vol. 15, No. 11 ( 2017-11), p. 905-915
    Abstract: It is frequently assumed that taking samples of soft marine sediments using surface‐based gravity coring equipment causes minimal disruption to their sedimentological, biogeochemical, and biological condition. This assumption was evaluated by examining the potential disturbances caused when obtaining soft‐sediment samples either by SCUBA or Craib‐coring, comparing sediment oxygen microprofiles, benthic oxygen flux rates and sediment solid phase analyses (chlorophyll a (Chl a ), organic carbon, and porosity) between both methods and against reference values measured in situ by benthic lander. The two sampling methodologies were tested in shallow coastal environments on the west coast of Scotland and generally the results obtained from cores collected using SCUBA exhibited values closest to those observed in situ. Oxygen penetration depth was significantly shallower in cores obtained by Craib‐corer compared with the SCUBA cores. Craib cores also produced higher oxygen uptake rates which could be caused by greater levels of sediment disturbance during sampling. In addition, more homogenous levels of Chl a in the top 1 cm of the Craib cores, compared with the SCUBA samples, may indicate either resuspension or compression during gravity coring. Using SCUBA for shallow‐water soft‐sediment sampling permits steady and controlled core‐tube insertion and extraction, and more measured retrieval of the cores to the surface; this probably accounts for the observed differences. Whereas benthic lander‐based in situ measurement would be the preferred method for analyzing sediment parameters in detail in this type of environment, SCUBA‐based sampling offers a more accurate alternative to surface‐based gravity coring.
    Type of Medium: Online Resource
    ISSN: 1541-5856 , 1541-5856
    URL: Issue
    URL: Article
    DOI: 10.1002/lom3.v15.11
    DOI: 10.1002/lom3.10211
    Language: English
    Publisher: Wiley
    Publication Date: 2017
    detail.hit.zdb_id: 2161715-6
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
  • 5
    Online Resource
    Online Resource
    Technical note: Estimating light-use efficiency of benthic habitats using underwater O〈sub〉2〈/sub〉 eddy covariance
    Copernicus GmbH ; 2020
    In:  Biogeosciences Vol. 17, No. 16 ( 2020-08-28), p. 4343-4353
    Details
    In: Biogeosciences, Copernicus GmbH, Vol. 17, No. 16 ( 2020-08-28), p. 4343-4353
    Abstract: Abstract. Light-use efficiency defines the ability of primary producers to convert sunlight energy to primary production and is computed as the ratio between the gross primary production and the intercepted photosynthetic active radiation. While this measure has been applied broadly within terrestrial ecology to investigate habitat resource-use efficiency, it remains underused within the aquatic realm. This report provides a conceptual framework to compute hourly and daily light-use efficiency using underwater O2 eddy covariance, a recent technological development that produces habitat-scale rates of primary production under unaltered in situ conditions. The analysis, tested on two benthic flux datasets, documents that hourly light-use efficiency may approach the theoretical limit of 0.125 O2 per photon under low-light conditions, but it decreases rapidly towards the middle of the day and is typically 10-fold lower on a 24 h basis. Overall, light-use efficiency provides a useful measure of habitat functioning and facilitates site comparison in time and space.
    Type of Medium: Online Resource
    ISSN: 1726-4189
    URL: Article
    DOI: 10.5194/bg-17-4343-2020
    Language: English
    Publisher: Copernicus GmbH
    Publication Date: 2020
    detail.hit.zdb_id: 2158181-2
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
  • 6
    Online Resource
    Online Resource
    High metabolism and periodic hypoxia associated with drifting macrophyte detritus in the shallow subtidal Baltic Sea
    Copernicus GmbH ; 2023
    In:  Biogeosciences Vol. 20, No. 9 ( 2023-05-04), p. 1713-1724
    Details
    In: Biogeosciences, Copernicus GmbH, Vol. 20, No. 9 ( 2023-05-04), p. 1713-1724
    Abstract: Abstract. Macrophytes form highly productive habitats that export a substantial proportion of their primary production as particulate organic matter. As the detritus drifts with currents and accumulates in seafloor depressions, it constitutes organic enrichment and can deteriorate O2 conditions on the seafloor. In this study, we investigate the O2 dynamics and macrobenthic biodiversity associated with a shallow ∼ 2300 m2 macrophyte detritus field in the northern Baltic Sea. The detritus, primarily Fucus vesiculosus fragments, had a biomass of ∼ 1700 g dry weight m−2, approximately 1.5 times larger than nearby intact F. vesiculosus canopies. A vertical array of O2 sensors placed within the detritus documented that hypoxia ([O2] 〈 63 µmol L−1) occurred for 23 % of the time and terminated at the onset of wave-driven hydrodynamic mixing. Measurements in five other habitats nearby, spanning bare sediments, seagrass, and macroalgae, indicate that hypoxic conditions were unique to detritus canopies. Fast-response O2 sensors placed above the detritus documented pulses of hypoxic waters originating from within the canopy. These pulses triggered a rapid short-term (∼ 5 min) deterioration of O2 conditions within the water column. Eddy covariance measurements of O2 fluxes indicated high metabolic rates, with daily photosynthetic production offsetting up to 81 % of the respiratory demands of the detritus canopy, prolonging its persistence within the coastal zone. The detritus site had a low abundance of crustaceans, bivalves, and polychaetes when compared to other habitats nearby, likely because their low O2 tolerance thresholds were often exceeded.
    Type of Medium: Online Resource
    ISSN: 1726-4189
    URL: Article
    URL: Article
    DOI: 10.5194/bg-20-1713-2023
    DOI: 10.5194/bg-20-1713-2023-supplement
    Language: English
    Publisher: Copernicus GmbH
    Publication Date: 2023
    detail.hit.zdb_id: 2158181-2
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
  • 7
    Online Resource
    Online Resource
    Benthic primary production and respiration of shallow rocky habitats: a case study from South Bay (Doumer Island, Western Antarctic Peninsula)
    Springer Science and Business Media LLC ; 2019
    In:  Polar Biology Vol. 42, No. 8 ( 2019-8), p. 1459-1474
    Details
    In: Polar Biology, Springer Science and Business Media LLC, Vol. 42, No. 8 ( 2019-8), p. 1459-1474
    Type of Medium: Online Resource
    ISSN: 0722-4060 , 1432-2056
    URL: Article
    DOI: 10.1007/s00300-019-02533-0
    Language: English
    Publisher: Springer Science and Business Media LLC
    Publication Date: 2019
    detail.hit.zdb_id: 1478942-5
    detail.hit.zdb_id: 584850-7
    SSG: 12
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
  • 8
    Online Resource
    Online Resource
    Oxygen fluxes beneath Arctic land-fast ice and pack ice: towards estimates of ice productivity
    Springer Science and Business Media LLC ; 2018
    In:  Polar Biology Vol. 41, No. 10 ( 2018-10), p. 2119-2134
    Details
    In: Polar Biology, Springer Science and Business Media LLC, Vol. 41, No. 10 ( 2018-10), p. 2119-2134
    Type of Medium: Online Resource
    ISSN: 0722-4060 , 1432-2056
    URL: Article
    DOI: 10.1007/s00300-018-2350-1
    Language: English
    Publisher: Springer Science and Business Media LLC
    Publication Date: 2018
    detail.hit.zdb_id: 1478942-5
    detail.hit.zdb_id: 584850-7
    SSG: 12
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
  • 9
    Online Resource
    Online Resource
    Seasonal ecosystem metabolism across shallow benthic habitats measured by aquatic eddy covariance
    Wiley ; 2019
    In:  Limnology and Oceanography Letters Vol. 4, No. 3 ( 2019-06), p. 79-86
    Details
    In: Limnology and Oceanography Letters, Wiley, Vol. 4, No. 3 ( 2019-06), p. 79-86
    Abstract: Shallow benthic habitats are hotspots for carbon cycling and energy flow, but metabolism (primary production and respiration) dynamics and habitat‐specific differences remain poorly understood. We investigated daily, seasonal, and annual metabolism in six key benthic habitats in the Baltic Sea using ~ 2900 h of in situ aquatic eddy covariance oxygen flux measurements. Rocky substrates had the highest metabolism rates. Habitat‐specific annual primary production per m 2 was in the order Fucus vesiculosus canopy  〉   Mytilus trossulus reef  〉   Zostera marina canopy  〉  mixed macrophytes canopy  〉  sands, whereas respiration was in the order M. trossulus   〉   F. vesiculosus   〉   Z. marina   〉  mixed macrophytes  〉 sands  〉  aphotic sediments. Winter metabolism contributed 22–31% of annual rates. Spatial upscaling revealed that benthic habitats drive 〉  90% of ecosystem metabolism in waters ≤5 m depth, highlighting their central role in carbon and nutrient cycling in shallow waters.
    Type of Medium: Online Resource
    ISSN: 2378-2242 , 2378-2242
    URL: Issue
    URL: Article
    DOI: 10.1002/lol2.v4.3
    DOI: 10.1002/lol2.10107
    Language: English
    Publisher: Wiley
    Publication Date: 2019
    detail.hit.zdb_id: 2876718-4
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
  • 10
    Online Resource
    Online Resource
    Correction to: Benthic primary production and respiration of shallow rocky habitats: a case study from South Bay (Doumer Island, Western Antarctic Peninsula)
    Springer Science and Business Media LLC ; 2019
    In:  Polar Biology Vol. 42, No. 8 ( 2019-8), p. 1475-1476
    Details
    In: Polar Biology, Springer Science and Business Media LLC, Vol. 42, No. 8 ( 2019-8), p. 1475-1476
    Type of Medium: Online Resource
    ISSN: 0722-4060 , 1432-2056
    URL: Article
    DOI: 10.1007/s00300-019-02548-7
    Language: English
    Publisher: Springer Science and Business Media LLC
    Publication Date: 2019
    detail.hit.zdb_id: 1478942-5
    detail.hit.zdb_id: 584850-7
    SSG: 12
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...