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  • 1
    Online Resource
    Online Resource
    Ecological Processes at Marine Fronts : Oases in the Ocean. (2015)
    Cham :Springer International Publishing AG,
    Details
    Keywords: Oceanography. ; Electronic books.
    Type of Medium: Online Resource
    Pages: 1 online resource (73 pages)
    Edition: 1st ed.
    ISBN: 9783319154794
    Series Statement: SpringerBriefs in Environmental Science Series
    URL: https://ebookcentral.proquest.com/lib/geomar/detail.action?docID=1998218
    DDC: 577.7
    Language: English
    Note: Intro -- Contents -- 1 Introduction -- Abstract -- 2 Frontal Types -- Abstract -- 2.1 Tidal Fronts -- 2.2 Shelf-Break Fronts -- 2.3 Upwelling Fronts -- 2.4 Estuarine Fronts -- 2.5 Plume Fronts -- 2.6 Fronts Associated with the Convergence or Divergence of Water Masses at High Seas -- 2.7 Frontal Eddies -- 2.8 Fronts Associated to Geomorphic Features -- 3 Biology of Fronts -- Abstract -- 3.1 Biological Production -- 3.2 Trophic Webs -- 3.3 Biogeography -- 3.4 Diversity -- 3.5 Life Histories Traits in Relation to Fronts -- 3.6 Migrations and Transport -- 4 Management and Conservation of Marine Life -- Abstract -- 4.1 Fisheries -- 4.2 Conservation Issues -- 4.3 Climate Change -- 5 Comparisons of Fronts with Other Boundaries at Sea -- Abstract -- 5.1 The Pycnocline Interface -- 5.2 The Sea Water-Sediment Interface -- 5.3 The Sea Surface-Atmosphere Interface -- 5.4 The Ice-Water Interface -- 5.5 Fronts Contrasted with the Other Interfaces -- 6 Comparisons of Fronts with Terrestrial Boundaries and the "Ecotone" Concept -- Abstract -- 7 Final Remarks -- Abstract -- 7.1 Landmarks and Beacons: Orienting and Meeting -- 7.2 Mechanical Energy for Retention -- 7.3 Mechanical Energy for Biological Production -- Literature Cited.
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  • 2
    Online Resource
    Online Resource
    Ecological Processes at Marine Fronts : Oases in the ocean (2015)
    Cham : Springer
    Details Availability
    Keywords: Life sciences ; Endangered ecosystems ; Aquatic biology ; Climatic changes ; Life Sciences ; Oceanography ; Landscape ecology ; Aquatic ecology . ; Climate change. ; Ecosystems. ; Life sciences ; Oceanography ; Endangered ecosystems ; Landscape ecology ; Aquatic biology ; Climatic changes
    Description / Table of Contents: 1. Introduction -- 2. Frontal types -- 3. Biology of fronts -- 4. Management and conservation of marine life -- 5. Comparisons of fronts with other boundaries at sea -- 6. Comparisons of fronts with terrestrial boundaries and the ‘ecotone’ concept -- 7. Final remarks -- 8. Conclusions.
    Type of Medium: Online Resource
    Pages: Online-Ressource (VIII, 68 p. 16 illus., 15 illus. in color, online resource)
    ISBN: 9783319154794
    Series Statement: SpringerBriefs in Environmental Science
    URL: https://doi.org/10.1007/978-3-319-15479-4
    URL: http://dx.doi.org/10.1007/978-3-319-15479-4
    URL: https://swbplus.bsz-bw.de/bsz427135532cov.jpg
    DOI: 10.1007/978-3-319-15479-4
    Language: English
    Note: Description based upon print version of record , Contents; 1 Introduction; Abstract ; 2 Frontal Types; Abstract ; 2.1 Tidal Fronts; 2.2 Shelf-Break Fronts; 2.3 Upwelling Fronts; 2.4 Estuarine Fronts; 2.5 Plume Fronts; 2.6 Fronts Associated with the Convergence or Divergence of Water Masses at High Seas; 2.7 Frontal Eddies; 2.8 Fronts Associated to Geomorphic Features; 3 Biology of Fronts; Abstract ; 3.1 Biological Production; 3.2 Trophic Webs; 3.3 Biogeography; 3.4 Diversity; 3.5 Life Histories Traits in Relation to Fronts; 3.6 Migrations and Transport; 4 Management and Conservation of Marine Life; Abstract ; 4.1 Fisheries , 4.2 Conservation Issues4.3 Climate Change; 5 Comparisons of Fronts with Other Boundaries at Sea; Abstract ; 5.1 The Pycnocline Interface; 5.2 The Sea Water-Sediment Interface; 5.3 The Sea Surface-Atmosphere Interface; 5.4 The Ice-Water Interface; 5.5 Fronts Contrasted with the Other Interfaces; 6 Comparisons of Fronts with Terrestrial Boundaries and the "Ecotone" Concept; Abstract ; 7 Final Remarks; Abstract ; 7.1 Landmarks and Beacons: Orienting and Meeting; 7.2 Mechanical Energy for Retention; 7.3 Mechanical Energy for Biological Production; Literature Cited
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  • 3
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    Hydrochemistry measured on water bottle samples from date 2005-12-06 at Bahía de Ancón, Peru
    PANGAEA
    In:  Universidad Nacional de Mar del Plata
    Details
    Publication Date: 2023-05-12
    Keywords: AN_nutr_061205_1; AN_nutr_061205_2; AN_nutr_061205_3; AN_nutr_061205_4; Ancón_Bay; Ancón, Peru; CENSOR; Climate variability and El Niño Southern Oscillation; DEPTH, water; Event label; HAND; Nitrate; Nitrite; Phosphate; Research station; Sampling by hand; Silicate
    Type: Dataset
    Format: text/tab-separated-values, 48 data points
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  • 4
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    Distribution pattern, density and growth of the stout razor clam Tagelus plebeius in a South-west Atlantic estuarine system (2018)
    In:  EPIC3Journal of the Marine Biological Association of the United Kingdom, 98(03), pp. 485-494, ISSN: 0025-3154
    Details
    Publication Date: 2018-05-29
    Description: The population biology of the stout razor clam Tagelus plebeius is poorly understood, despite the species' current wide distribution, and the potential use of its Holocene shell deposits to infer past environmental and ecological conditions. This study investigates distribution and growth pattern of T. plebeius in the south-western Atlantic Mar Chiquita Coastal lagoon (37°32′S 57°19′W), Argentina. The population includes the oldest individuals (up to 27 years) reported so far with shell length up to 77.9 mm. A von Bertalanffy model with L∞ = 67.60 mm (95% CI = 64.55; 70.64), k = 0.181 year−1 (CI = 0.142; 0.218), and t0 = −0.77 (CI = −1.46; −0.08) best described their individual growth for the whole population. The higher density, growth rate k, t0 and maximum age and lower L∞ were in the low intertidal rather than in the medium intertidal, but there were no differences in density and age between medium and high intertidal. Given the results and the current knowledge on the effects of different factors influencing this species, we conclude that the distribution pattern and shell growth observed in our study reflect a response to metabolic necessities in combination with a strong influence of biological interactions.
    Repository Name: EPIC Alfred Wegener Institut
    Type: Article , isiRev
    Format: application/pdf
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  • 5
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    Spatial heterogeneity in species composition constrains plant community responses to herbivory and fertilisation (2018)
    WILEY-BLACKWELL PUBLISHING
    In:  EPIC3Ecology Letters, WILEY-BLACKWELL PUBLISHING, 21(9), pp. 1364-1371, ISSN: 1461-023X
    Details
    Publication Date: 2018-11-09
    Description: Environmental change can result in substantial shifts in community composition. The associated immigration and extinction events are likely constrained by the spatial distribution of species. Still, studies on environmental change typically quantify biotic responses at single spatial (time series within a single plot) or temporal (spatial beta diversity at single time points) scales, ignoring their potential interdependence. Here, we use data from a global network of grassland experiments to determine how turnover responses to two major forms of environmental change – fertilisation and herbivore loss – are affected by species pool size and spatial compositional heterogeneity. Fertilisation led to higher rates of local extinction, whereas turnover in herbivore exclusion plots was driven by species replacement. Overall, sites with more spatially heterogeneous composition showed significantly higher rates of annual turnover, independent of species pool size and treatment. Taking into account spatial biodiversity aspects will therefore improve our understanding of consequences of global and anthropogenic change on community dynamics.
    Repository Name: EPIC Alfred Wegener Institut
    Type: Article , isiRev
    Format: application/pdf
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  • 6
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    Ecological importance of passive deposition of organic matter into burrows of the SW Atlantic crab Chasmagnathus granulatus (2011)
    Inter-Research
    Details
    Publication Date: 2022-05-25
    Description: Author Posting. © Inter-Research, 2006. This article is posted here by permission of Inter-Research for personal use, not for redistribution. The definitive version was published in Marine Ecology Progress Series 312 (2006): 201-21, doi:10.3354/meps312201.
    Description: The burrowing crab Chasmagnathus granulatus is the most abundant bioturbator in estuarine intertidal sediments from southern Brazil to central Argentina. This crab is a deposit feeder that excavates and maintains large semi-permanent open burrows with funnel shaped entrances. In this study we showed that the funnel shaped burrows with low aspect ratio are the most common and, with field experiments, we demonstrated that these burrows are also the most efficient in the capture of organic matter. As shown by C isotopic signatures, the origin of trapped detrital material is Spartina densiflora. Burrows are distributed in the upper part of estuaries and saltmarshes, mostly in areas of low energy, and cover extensive areas between the marsh vegetation and the open estuary. Through sampling of crab densities and use of satellite images, we estimated the number of burrows of different shapes in the Bahia Blanca estuary (38°50’S), one of the largest estuarine intertidals in the SW Atlantic. After combining this information with the trapping efficiency of burrows of different shapes, we estimated that within 100 d, a crab bed could capture the entire annual production from a marsh area of similar size. Therefore, we suggest that these extensive burrow beds may be considered large macrodetritus retention areas, reducing the amount of organic matter exported from marshes but locally increasing the sediment organic matter content.
    Description: This research was supported by grants from the Universidad Nacional de Mar del Plata, CONICET (PIA No. 6097 to O.I.), International Foundation for Science, Sweden (No. A/3058-2F to F.B.), Agencia Nacional de Promocion Cientifica y Tecnologica (PICT 13527-03 to O.I.), and Fundación Antorchas (No. 13956-46 to F.B., No. 53900-13 to O.I.). F.B. and J.G. were supported by CONICET scholarships and summer research fellowships from the Woods Hole Marine Biological Laboratory.
    Keywords: Spartina-marsh ; Chasmagnathus granulatus ; Burrowing ; Detritus dynamics
    Repository Name: Woods Hole Open Access Server
    Type: Article
    Format: application/pdf
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  • 7
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    Impact of burrowing crabs on C and N sources, control, and transformations in sediments andfood webs of SW Atlantic estuaries (2011)
    Inter-Research
    Details
    Publication Date: 2022-05-26
    Description: Author Posting. © Inter-Research, 2005. This article is posted here by permission of Inter-Research for personal use, not for redistribution. The definitive version was published in Marine Ecology Progress Series 293 (2005): 155-164, doi:10.3354/meps293155.
    Description: The intertidal burrowing crab Chasmagnathus granulatus is the dominant species in soft bare sediments and vegetated intertidal areas along the SW Atlantic estuaries (southern Brazil, 28°S, to northern Patagonia, 42°S). C. granulatus creates burrows that can reach densities of 60 burrows m–2, and its burrowing activities increase water and organic matter content of sediments. To evaluate the long-term effect of burrows on the origin and transformation of accumulated organic matter within sediments, we compared C and N stable isotope signatures of sediments, plants, and consumers within areas with and without crabs. 15N signatures of sediments and primary producers were enriched by 3 to 7‰ in areas with crabs. The enrichment was present in 4 different Argentine estuarine environments (Mar Chiquita coastal lagoon, 37°46’S, 57°19’W, Bahia Blanca, 38°50’S, 62°07’W, San Blas, 40°33’S, 62°14’W, San Antonio, 40°48’S, 64°52’W). Enrichment owing to crab activity appeared to overwhelm possible different N loads, anthropogenic influence, and other properties. Crab activity thus uncoupled the nitrogen dynamics in sediments from external controls. Enrichment of the heavier isotope of N could be the result of an increase in denitrification rates in areas with burrows. Crabs therefore forced faster transformation of available to unavailable nitrogen, making less inorganic nitrogen available to deeper waters. Food webs in areas with and without crabs were similar in shape, but less mobile benthic organisms (nematodes, fiddler crabs and the polychaete Laeonereis acuta) showed enriched N isotopic signatures. The benthic food web seemed separate from that of suspension feeders or water column consumers. Benthic microalgae were an important source for infauna, and marsh plants were particularly important for burrowing crabs.
    Description: This research was supported by Marine Biological Laboratory (MBL, Woods Hole, Massachusetts) Summer Research Fellowships to F.B. and O.I. This study was partially supported by the Fundacion Antorchas (13956-46 to F.B. and 14116/230 to O.I.). P.M. was supported by a fellowship from CONICET.
    Keywords: Estuaries ; Food webs ; Stable isotopes
    Repository Name: Woods Hole Open Access Server
    Type: Article
    Format: application/pdf
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