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  • GEOMAR Katalog / E-Books
  • Zeitschriften
  • Artikel  (7)
  • OceanRep  (14)
  • Wiley  (10)
  • Dessau-Roßlau : Umweltbundesamt  (3)
  • GEOMAR  (3)
  • Nature Research  (3)
  • Bibliothek Wissenschaftspark Albert Einstein  (2)
  • GFZ German Research Centre for Geosciences
  • 2015-2019  (21)
  • 2018  (21)
Publikationsart
  • GEOMAR Katalog / E-Books
  • Zeitschriften
  • Artikel  (7)
  • OceanRep  (14)
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  • 2015-2019  (21)
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  • 1
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    Diverse effects of invasive ecosystem engineers on marine biodiversity and ecosystem functions - a global review and meta-analysis (2018)
    Wiley
    In:  Global Change Biology, 24 (3). pp. 906-924.
    Details
    Publikationsdatum: 2021-02-08
    Beschreibung: Invasive ecosystem engineers (IEE) are potentially one of the most influential types of biological invaders. They are expected to have extensive ecological impacts by altering the physical–chemical structure of ecosystems, thereby changing the rules of existence for a broad range of resident biota. To test the generality of this expectation, we used a global systematic review and meta-analysis to examine IEE effects on the abundance of individual species and communities, biodiversity (using several indices) and ecosystem functions, focusing on marine and estuarine environments. We found that IEE had a significant effect (positive and negative) in most studies testing impacts on individual species, but the overall (cumulative) effect size was small and negative. Many individual studies showed strong IEE effects on community abundance and diversity, but the direction of effects was variable, leading to statistically non-significant overall effects in most categories. In contrast, there was a strong overall effect on most ecosystem functions we examined. IEE negatively affected metabolic functions and primary production, but positively affected nutrient flux, sedimentation and decomposition. We use the results to develop a conceptual model by highlighting pathways whereby IEE impact communities and ecosystem functions, and identify several sources of research bias in the IEE-related invasion literature. Only a few of the studies simultaneously quantified IEE effects on community/diversity and ecosystem functions. Therefore, understanding how IEE may alter biodiversity–ecosystem function relationships should be a primary focus of future studies of invasion biology. Moreover, the clear effects of IEE on ecosystem functions detected in our study suggest that scientists and environmental managers ought to examine how the effects of IEE might be manifested in the services that marine ecosystems provide to humans.
    Materialart: Article , PeerReviewed , info:eu-repo/semantics/article
    Format: text
    Format: text
    Format: text
    DOI: 10.1111/gcb.14007
    Standort Signatur Einschränkungen Verfügbarkeit
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    OceanRep: Artikel in einer Fachzeitschrift - begutachtet
  • 2
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    Hydrological and environmental variables outperform spatial factors in structuring species, trait composition, and beta diversity of pelagic algae (2018)
    Wiley
    In:  Ecology and Evolution, 8 (5). pp. 2947-2961.
    Details
    Publikationsdatum: 2021-02-08
    Beschreibung: There has been increasing interest in algae-based bioassessment, particularly, trait-based approaches are increasingly suggested. However, the main drivers, especially the contribution of hydrological variables, of species composition, trait composition, and beta diversity of algae communities are less studied. To link species and trait composition to multiple factors (i.e., hydrological variables, local environmental variables, and spatial factors) that potentially control species occurrence/abundance and to determine their relative roles in shaping species composition, trait composition, and beta diversities of pelagic algae communities, samples were collected from a German lowland catchment, where a well-proven ecohydrological modeling enabled to predict long-term discharges at each sampling site. Both trait and species composition showed significant correlations with hydrological, environmental, and spatial variables, and variation partitioning revealed that the hydrological and local environmental variables outperformed spatial variables. A higher variation of trait composition (57.0%) than species composition (37.5%) could be explained by abiotic factors. Mantel tests showed that both species and trait-based beta diversities were mostly related to hydrological and environmental heterogeneity with hydrological contributing more than environmental variables, while purely spatial impact was less important. Our findings revealed the relative importance of hydrological variables in shaping pelagic algae community and their spatial patterns of beta diversities, emphasizing the need to include hydrological variables in long-term biomonitoring campaigns and biodiversity conservation or restoration. A key implication for biodiversity conservation was that maintaining the instream flow regime and keeping various habitats among rivers are of vital importance. However, further investigations at multispatial and temporal scales are greatly needed.
    Materialart: Article , PeerReviewed
    Format: text
    DOI: 10.1002/ece3.3903
    Standort Signatur Einschränkungen Verfügbarkeit
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    OceanRep: Artikel in einer Fachzeitschrift - begutachtet
  • 3
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    Experimental strategies to assess the biological ramifications of multiple drivers of global ocean change-A review (2018)
    Wiley
    In:  Global Change Biology, 24 (6). pp. 2239-2261.
    Details
    Publikationsdatum: 2021-02-08
    Beschreibung: Marine life is controlled by multiple physical and chemical drivers and by diverse ecological processes. Many of these oceanic properties are being altered by climate change and other anthropogenic pressures. Hence, identifying the influences of multifaceted ocean change, from local to global scales, is a complex task. To guide policy-making and make projections of the future of the marine biosphere, it is essential to understand biological responses at physiological, evolutionary and ecological levels. Here, we contrast and compare different approaches to multiple driver experiments that aim to elucidate biological responses to a complex matrix of ocean global change. We present the benefits and the challenges of each approach with a focus on marine research, and guidelines to navigate through these different categories to help identify strategies that might best address research questions in fundamental physiology, experimental evolutionary biology and community ecology. Our review reveals that the field of multiple driver research is being pulled in complementary directions: the need for reductionist approaches to obtain process-oriented, mechanistic understanding and a requirement to quantify responses to projected future scenarios of ocean change. We conclude the review with recommendations on how best to align different experimental approaches to contribute fundamental information needed for science-based policy formulation.
    Materialart: Article , PeerReviewed
    Format: text
    Format: other
    Format: text
    DOI: 10.1111/gcb.14102
    Standort Signatur Einschränkungen Verfügbarkeit
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    OceanRep: Artikel in einer Fachzeitschrift - begutachtet
  • 4
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    An acquisition, curation and management workflow for sustainable, terabyte-scale marine image analysis (2018)
    Nature Research
    In:  Scientific Data, 5 (180181).
    Details
    Publikationsdatum: 2021-03-19
    Beschreibung: Optical imaging is a common technique in ocean research. Diving robots, towed cameras, drop-cameras and TV-guided sampling gear: all produce image data of the underwater environment. Technological advances like 4K cameras, autonomous robots, high-capacity batteries and LED lighting now allow systematic optical monitoring at large spatial scale and shorter time but with increased data volume and velocity. Volume and velocity are further increased by growing fleets and emerging swarms of autonomous vehicles creating big data sets in parallel. This generates a need for automated data processing to harvest maximum information. Systematic data analysis benefits from calibrated, geo-referenced data with clear metadata description, particularly for machine vision and machine learning. Hence, the expensive data acquisition must be documented, data should be curated as soon as possible, backed up and made publicly available. Here, we present a workflow towards sustainable marine image analysis. We describe guidelines for data acquisition, curation and management and apply it to the use case of a multi-terabyte deep-sea data set acquired by an autonomous underwater vehicle.
    Materialart: Article , PeerReviewed
    Format: text
    DOI: 10.1038/sdata.2018.181
    Standort Signatur Einschränkungen Verfügbarkeit
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    OceanRep: Artikel in einer Fachzeitschrift - begutachtet
  • 5
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    What makes an ideal global stocktake? : A functional analysis ; discussion paper (2018)
    Dessau-Roßlau : Umweltbundesamt
    Details
    Publikationsdatum: 2022-02-18
    Beschreibung: Many hope that the Global Stocktake under the Paris Agreement can become a catalyst for increased mitigation ambition over time. Based on different theories of change, this paper outlines four governance functions for the Global Stocktake. It can contribute to the Paris Agreement as a pacemaker (stimulating and synchronizing policy processes across governance levels), by ensuring accountability of Parties, by enhancing ambition through benchmarks for action and transformative learning, and by reiterating and refining the guidance and signal provided from the Paris Agreement. The paper further outlines process- and information-related preconditions that would enable an ideal Global Stocktake.
    Schlagwort(e): ddc:320
    Repository-Name: Wuppertal Institut für Klima, Umwelt, Energie
    Sprache: Englisch
    Materialart: workingpaper , doc-type:workingPaper
    Format: application/pdf
    Standort Signatur Einschränkungen Verfügbarkeit
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    ARTIKEL (OA)
  • 6
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    Fluid geographies: Marine territorialisation and the scaling up of local aquatic epistemologies on the Pacific coast of Colombia (2018)
    Wiley
    In:  EPIC3Transactions of the Institute of British Geographers, Wiley, 43(1), pp. 61-78, ISSN: 0020-2754
    Details
    Publikationsdatum: 2024-02-07
    Beschreibung: The Pacific region of Colombia, like many sparsely populated places in developing countries, has been imagined as empty in social terms, and yet full in terms of natural resources and biodiversity. These imaginaries have enabled the creation of frontiers of land and sea control, where the state as well as private and illegal actors have historically dispossessed Afro-descendant and indigenous peoples. This paper contributes to the understanding of territorialisation in the oceans, where political and legal framings of the sea as an open-access public good have neglected the existence of marine social processes. It shows how Afro-descendant communities and non-state actors are required to use the language of resources, rather than socio-cultural attachment, to negotiate state marine territorialisation processes. Drawing on a case study on the Pacific coast of Colombia, we demonstrate that Afro-descendant communities hold local aquatic epistemologies, in which knowledge and the production of space are entangled in fluid and volumetric spatio-temporal dynamics. However, despite the social importance of aquatic environments, they were excluded from Afro-descendants' collective territorial rights in the 1990s. Driven by their local aquatic epistemologies, coastal communities are reclaiming authority over the seascape through the creation of a marine protected area. We argue that they have transformed relations of authority at sea to ensure local access and control, using state institutional instruments to subvert and challenge the legal framing of the sea as an open access public good. As such, this marine protected area represents a place of resistance that ironically subjects coastal communities to disciplinary technologies of conservation.
    Repository-Name: EPIC Alfred Wegener Institut
    Materialart: Article , isiRev
    Format: application/pdf
    Standort Signatur Einschränkungen Verfügbarkeit
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    ARTIKEL (OA)
  • 7
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    15th International Circumpolar Remote Sensing Symposium – Book of Abstracts. Polar Regions in Transformation – Climatic Change and Anthropogenic Pressures (2018)
    Bibliothek Wissenschaftspark Albert Einstein
    In:  EPIC3Potsdam, Germany, Bibliothek Wissenschaftspark Albert Einstein, 153 p.
    Details
    Publikationsdatum: 2019-12-23
    Repository-Name: EPIC Alfred Wegener Institut
    Materialart: Book , peerRev
    Format: application/pdf
    Standort Signatur Einschränkungen Verfügbarkeit
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    ARTIKEL (OA)
  • 8
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    Partitioning of the Open Waters of the Gulf of Mexico Based on the Seasonal and Interannual Variability of Chlorophyll Concentration (2018)
    AGU (American Geophysical Union) | Wiley
    Details
    Publikationsdatum: 2022-03-09
    Beschreibung: The seasonal and interannual variability of chlorophyll in the Gulf of Mexico open waters is studied using a three‐dimensional coupled physical‐biogeochemical model. A 5 years hindcast driven by realistic open‐boundary conditions, atmospheric forcings, and freshwater discharges from rivers is performed. The use of recent in situ observations allowed an in‐depth evaluation of the model nutrient and chlorophyll seasonal distributions, including the chlorophyll vertical structure. We find that different chlorophyll patterns of temporal variability coexist in the deep basin which thereby cannot be considered as a homogeneous region with respect to chlorophyll dynamics. A partitioning of the Gulf of Mexico open waters based on the winter chlorophyll concentration increase is then proposed. This partition is basically explained by the amount of nutrients injected into the euphotic layer which is highly constrained by the dynamic of the winter mixed layer. The seasonal and interannual variability appears to be affected by the variability of atmospheric fluxes and mesoscale dynamics (Loop Current eddies in particular). Finally, estimates of primary production in the deep basin are provided.
    Materialart: Article , PeerReviewed
    Format: text
    Standort Signatur Einschränkungen Verfügbarkeit
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    OceanRep: Artikel in einer Fachzeitschrift - begutachtet
  • 9
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    Transgenerational plasticity and selection shape the adaptive potential of sticklebacks to salinity change (2018)
    Wiley
    In:  Evolutionary Applications, 11 (10). pp. 1873-1885.
    Details
    Publikationsdatum: 2021-03-18
    Beschreibung: In marine climate change research, salinity shifts have been widely overlooked. While widespread desalination effects are expected in higher latitudes, salinity is predicted to increase closer to the equator. Here, we use the steep salinity gradient of the Baltic Sea as a space‐for time design to address effects of salinity change on populations. Additionally, genetic diversity, a prerequisite for adaptive responses, is reduced in Baltic compared to Atlantic populations. On the one hand, adaptive transgenerational plasticity (TGP) might buffer the effects of environmental change, which may be of particular importance under reduced genetic variation. On the other hand, physiological trade‐offs due to environmental stress may hamper parental provisioning to offspring thereby intensifying the impact of climate change across generations (non‐adaptive TGP). Here, we studied both hypothesis of adaptive and non‐adaptive TGP in the three‐spined stickleback (Gasterosteus aculeatus) fish model along the strong salinity gradient of the Baltic Sea in a space‐for‐time experiment. Each population tolerated desalination well, which was not altered by parental exposure to low salinity. Despite a common marine ancestor, populations locally adapted to low salinity lost their ability to cope with fully marine conditions, resulting in lower survival and reduced relative fitness. Negative transgenerational effects were evident in early life stages, but disappeared after selection via mortality occurred during the first 12‐30 days post hatch. Modeling various strengths of selection, we showed that non‐adaptive transgenerational plasticity accelerated evolution by increasing directional selection within the offspring generation. Qualitatively, when genetic diversity is large, we predict that such effects will facilitate rapid adaptation and population persistence, while below a certain threshold populations suffer a higher risk of local extinction. Overall, our results suggest that transgenerational plasticity and selection are not independent of each other and thereby highlight a current gap in TGP studies.
    Materialart: Article , PeerReviewed
    Format: text
    Format: text
    DOI: 10.1111/eva.12688
    Standort Signatur Einschränkungen Verfügbarkeit
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    OceanRep: Artikel in einer Fachzeitschrift - begutachtet
  • 10
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    15th International Circumpolar Remote Sensing Symposium : Polar Regions in Transformation - Climatic Change and Anthropogenic Pressures ; Book of Abstracts, 10 - 14 September 2018, Potsdam, Germany (2018)
    Bibliothek Wissenschaftspark Albert Einstein
    Details
    Publikationsdatum: 2020-02-12
    Beschreibung: The theme of the 15th ICRSS is “Polar Regions in Transformation – Climatic Change and Anthropogenic Pressures”. Earth’s Polar Regions, including high mountain regions outside the high latitudes, feature cold-climate environments characterized by unique landscapes, biota, and processes. Many of these features and dynamics are Cryosphere-driven and either are already subject to or have the potential for fundamental and rapid changes in a warming world. The myriad of Earth observation technologies provide crucial tools to understand and quantify these changes. The 15th ICRSS in Potsdam is the largest in the conference series to date: About 100 registered participants come from 16 countries, demonstrating the true international character of this otherwise intimate but focused polar symposium. Together, with an engaged Local Organizing Committee and the International Scientific Committee, we organized 10 scientific sessions with 61 oral and 38 poster presentations, covering nearly all fields of Cryosphere research as well as research on northern vegetation and polar oceanography. The symposium program will be headlined by an exciting set of 7 keynote speakers highlighting the scientific frontiers in our research fields.
    Sprache: Englisch
    Materialart: info:eu-repo/semantics/conferenceObject
    Format: application/pdf
    Standort Signatur Einschränkungen Verfügbarkeit
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