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435 results on '"Kröncke, Ingrid"'

9. Benthos as a key driver of morphological change in coastal regions.

Author

Arlinghaus, Peter, Schrum, Corinna, Kröncke, Ingrid, and Zhang, Wenyan

Subjects
BENTHOS, STORM surges, COASTAL development, FUNCTIONAL groups, BIOMASS, HYDRODYNAMICS
Abstract

Benthos has long been recognized as an important factor influencing local sediment stability, deposition, and erosion rates. However, its role in long-term (annual to decadal scale) and large-scale coastal morphological change remains largely speculative. This study aims to derive a quantitative understanding of the importance of benthos in the morphological development of a tidal embayment (Jade Bay) as representative of tidal coastal regions. To achieve this, we first applied a machine-learning-aided species abundance model to derive a complete map of benthos (functional groups, abundance, and biomass) in the study area, based on abundance and biomass measurements. The derived data were used to parameterize the benthos effect on sediment stability, erosion rates and deposition rates, erosion and hydrodynamics in a 3-dimensional hydro-eco-morphodynamic model, which was then applied to Jade Bay to hindcast the morphological and sediment change for 2000–2009. Simulation results indicate significantly improved performance with the benthos effect included. Simulations including benthos show consistency with measurements regarding morphological and sediment changes, while abiotic drivers (tides, storm surges) alone result in a reversed pattern in terms of erosion and deposition contrary to measurement. Based on comparisons among scenarios with various combinations of abiotic and biotic factors, we further investigated the level of complexity of the hydro-eco-morphodynamic models that is needed to capture long-term and large-scale coastal morphological development. The accuracy in the parameterization data was crucial for increasing model complexity. When the parameterization uncertainties were high, the increased model complexity decreased the model performance. [ABSTRACT FROM AUTHOR]

Published
2024
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18. Meta-analysis of multidecadal biodiversity trends in Europe

Author

Pilotto, Francesca, Kühn, Ingolf, Adrian, Rita, Alber, Renate, Alignier, Audrey, Andrews, Christopher, Bäck, Jaana, Barbaro, Luc, Beaumont, Deborah, Beenaerts, Natalie, Benham, Sue, Boukal, David S., Bretagnolle, Vincent, Camatti, Elisa, Canullo, Roberto, Cardoso, Patricia G., Ens, Bruno J., Everaert, Gert, Evtimova, Vesela, Feuchtmayr, Heidrun, García-González, Ricardo, Gómez García, Daniel, Grandin, Ulf, Gutowski, Jerzy M., Hadar, Liat, Halada, Lubos, Halassy, Melinda, Hummel, Herman, Huttunen, Kaisa-Leena, Jaroszewicz, Bogdan, Jensen, Thomas C., Kalivoda, Henrik, Schmidt, Inger Kappel, Kröncke, Ingrid, Leinonen, Reima, Martinho, Filipe, Meesenburg, Henning, Meyer, Julia, Minerbi, Stefano, Monteith, Don, Nikolov, Boris P., Oro, Daniel, Ozoliņš, Dāvis, Padedda, Bachisio M., Pallett, Denise, Pansera, Marco, Pardal, Miguel Ângelo, Petriccione, Bruno, Pipan, Tanja, Pöyry, Juha, Schäfer, Stefanie M., Schaub, Marcus, Schneider, Susanne C., Skuja, Agnija, Soetaert, Karline, Spriņģe, Gunta, Stanchev, Radoslav, Stockan, Jenni A., Stoll, Stefan, Sundqvist, Lisa, Thimonier, Anne, Van Hoey, Gert, Van Ryckegem, Gunther, Visser, Marcel E., Vorhauser, Samuel, and Haase, Peter

Published
2020
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19. Abundance, biomass and species richness of macrozoobenthos along an intertidal elevation gradient.

Author

Dewenter, Jana, Yong, Joanne, Schupp, Peter J., Lõhmus, Kertu, Kröncke, Ingrid, Moorthi, Stefanie, Pieck, Daniela, Kuczynski, Lucie, and Rohde, Sven

Subjects
MARINE biodiversity, SPECIES diversity, TIDAL flats, BIOMASS, GLOBAL environmental change, SALT marshes, ALTITUDES, FOOD composition
Abstract

Ecology aims to comprehend species distribution and its interaction with environmental factors, from global to local scales. While global environmental changes affect marine biodiversity, understanding the drivers at smaller scales remains crucial. Tidal flats can be found on most of the world's coastlines and are particularly vulnerable to anthropogenic disturbances. They are important transient ecosystems between terrestrial and marine ecosystems, and their biodiversity provides important ecosystem services. Owing to this unique, terrestrial–marine transition, strong environmental gradients of elevation, sediment composition and food availability prevail. Here, we investigated which regional and local environmental factors drive the spatio‐temporal dynamics of macrozoobenthos communities on back‐barrier tidal flats in the East Frisian Wadden Sea. On the regional level, we found that species composition changed significantly from west to east on the East Frisian islands and that total abundance and species richness decreased from west to east. On the local abiotic level, we found that macrozoobenthos biomass decreased with higher elevation towards the salt marsh and that the total abundance of organisms in the sediment significantly increased with increasing mud content, while biodiversity and biomass were not changing significantly. In contrast to expectations, increasing Chl a availability as a measure of primary productivity did not result in changes in abundance, biomass or biodiversity, but extremely high total organic carbon (TOC) content was associated with a decrease in biomass and biodiversity. In conclusion, we found regional and local relationships that are similar to those observed in previous studies on macrozoobenthos in the Wadden Sea. Macrozoobenthos biomass, abundance and biodiversity are interrelated in a complex way with the physical, abiotic and biotic processes in and above the sediment. [ABSTRACT FROM AUTHOR]

Published
2023
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20. Benthos as a key driver of morphological change in coastal regions

Author

Arlinghaus, Peter Paul, Schrum, Corinna, Kröncke, Ingrid, and Zhang, Wenyan

Abstract

Benthos has long been recognized as an important factor influencing local sediment stability, deposition and erosion rates. However, its role in long-term (annual-to-decadal scale) and large-scale coastal morphological change remains largely speculative. This study aims to derive a quantitative understanding of the importance of benthos in the morphological development of a tidal embayment (Jade Bay), as representative for tidal coastal regions. To achieve this, we firstly applied a machine learning-aided species abundance model to derive a complete map of benthos (functional groups, abundance and biomass) in the study area, based on abundance and biomass measurements. The derived data were used to parameterize the benthos effect on sediment stability, erosion/deposition rates, and hydrodynamics in a 3-dimensional hydro-eco-morphodynamic model, which was then applied to the Jade Bay to hindcast morphological and sediment change for 2000–2009. Simulation results indicate significantly improved performance with benthos effect included. Results suggest that the model is able to reproduce the main pattern of morphological change only when benthos impact is included, whilst abiotic drivers (tides, storm surges) alone would lead to an opposite pattern. Based on comparison among scenarios with various combinations of abiotic and biotic factors, we further investigated the level of complexity of hydro-eco-morphodynamic models that is needed to capture long-term and large-scale coastal morphological development. The accuracy in parametrization data was crucial for increasing model complexity. When the parametrization uncertainties were high, increased model complexity decreased model performance.

Published
2023

24. Long-term response of coastal macrofauna communities to de-eutrophication and sea level rise mediated habitat changes (1980s versus 2018)

Author

Singer, Anja, primary, Bijleveld, Allert I., additional, Hahner, Florian, additional, Holthuijsen, Sander J., additional, Hubert, Krischan, additional, Kerimoglu, Onur, additional, Kleine Schaars, Loran , additional, Kröncke, Ingrid, additional, Lettmann, Karsten A., additional, Rittweg, Timo, additional, Scheiffarth, Gregor, additional, van der Veer, Henk W., additional, and Wurpts, Andreas, additional

Published
2023
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25. Spatial Structure and Biodiversity of Macrofauna in Munition Dumpsites – a Case Study from the Baltic Sea

Author

Vedenin, Andrey A., Kröncke, Ingrid, Beck, Aaron J., Bodenbinder, Andrea, Chrysagi, Evridiki, Gräwe, Ulf, Kampmeier, Mareike, Greinert, Jens, Vedenin, Andrey A., Kröncke, Ingrid, Beck, Aaron J., Bodenbinder, Andrea, Chrysagi, Evridiki, Gräwe, Ulf, Kampmeier, Mareike, and Greinert, Jens

Abstract

The German EEZ contains about 1.6 million tons of dumped munition, mostly left after World Wars. This study investigated the benthic macrofauna around the ‘Kolberger Heide’ munition dumpsite (Baltic Sea). A total of 93 macrofauna grab samples were obtained in the proximity of the munition dumpsite and in a background. Environmental variables analysed included the latitude/longitude, depth, hillshade, sediment grainsize, TNT concentration in the bottom water and distance to the centre of munition dumpsite. The overall abundance, biomass and diversity varied among these groups, though demonstrated no clear differences regarding the proximity to munition and near-bottom TNT concentration. Among individual taxa, however, a total of 16 species demonstrated significant correlation with the TNT concentration. Morover, the TNT may serve as a predictor for the distribution of three species: the gastropod Retusa truncatula, bivalve Varicorbula and polychaete Spio goniocephala. Possible reasons for the species distribution including their biological traits are discussed.

Published
2023
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36. Commonness and rarity in the marine biosphere

Author

Connolly, Sean R., MacNeil, M. Aaron, Caley, M. Julian, Knowlton, Nancy, Cripps, Ed, Hisano, Mizue, Thibaut, Loïc M., Bhattacharya, Bhaskar D., Benedetti-Cecchi, Lisandro, Brainard, Russell E., Brandt, Angelika, Bulleri, Fabio, Ellingsen, Kari E., Kaiser, Stefanie, Kröncke, Ingrid, Linse, Katrin, Maggi, Elena, O'Hara, Timothy D., Plaisance, Laetitia, Poore, Gary C. B., Sarkar, Santosh K., Satpathy, Kamala K., Schückel, Ulrike, Williams, Alan, and Wilson, Robin S.

Published
2014

45. Food web structure and community composition : a comparison across space and time in the North Sea

Author

Frelat, Romain, Kortsch, Susanne, Kröncke, Ingrid, Neumann, Hermann, Nordström, Marie C., Olivier, Pierre E.N., Sell, Anne F., Frelat, Romain, Kortsch, Susanne, Kröncke, Ingrid, Neumann, Hermann, Nordström, Marie C., Olivier, Pierre E.N., and Sell, Anne F.

Abstract

Ecological communities are constantly changing as a response to environmental and anthropogenic pressures. Yet, how changes in community composition influence the structure of food webs over time and space remains elusive. Using ecological network analysis, we assessed how food web structure changed across six distinct areas of the North Sea over a sixteen-year time-period. We used multivariate analyses to disentangle and compare spatio-temporal dynamics in community composition (i.e. changes in species abundances) and food web structure (i.e. changes in network properties). Specifically, we assessed how changes in community composition were reflected in food web structure. Our results revealed a strong spatial coupling between community composition and food web structure along a south–north gradient. However, the temporal covariation between community composition and food web structure depended on the spatial scale. We observed a temporal mismatch at regional scale, but a strong coupling at local scale. In particular, we found that community composition can be influenced by hydro-climatic events over large areas, with diverse effects manifesting in local food web structure. Our proposed methodological framework quantified and compared spatio-temporal changes in community composition and food web structure, providing key information to support effective management strategies aimed at conserving the structure and functioning of ecological communities in times of environmental change.

Published
2022

50. Ecosystem-based marine spatial management: Review of concepts, policies, tools, and critical issues

Author

Katsanevakis, Stelios, Stelzenmüller, Vanessa, South, Andy, Sørensen, Thomas Kirk, Jones, Peter J.S., Kerr, Sandy, Badalamenti, Fabio, Anagnostou, Christos, Breen, Patricia, Chust, Guillem, D’Anna, Giovanni, Duijn, Mike, Filatova, Tatiana, Fiorentino, Fabio, Hulsman, Helena, Johnson, Kate, Karageorgis, Aristomenis P., Kröncke, Ingrid, Mirto, Simone, Pipitone, Carlo, Portelli, Susan, Qiu, Wanfei, Reiss, Henning, Sakellariou, Dimitris, Salomidi, Maria, van Hoof, Luc, Vassilopoulou, Vassiliki, Vega Fernández, Tomás, Vöge, Sandra, Weber, Anke, Zenetos, Argyro, and Hofstede, Remment ter

Published
2011
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