Article
Fisheries
Wolf-Christian Lewin, Marc Simon Weltersbach, Kevin Haase, Robert Arlinghaus, Harry V. Strehlow
Summary: This study found that the western Baltic cod population collapsed in 2016/17, which led to the introduction of a bag limit in recreational fishing. However, the number of anglers and catch rates showed weak correlation with cod stock biomass, indicating that this fishery-related indicator was more responsive to the bag limit than stock status. The study highlights the importance of long-term monitoring programs for identifying change points in recreational fisheries and improving fisheries management in the future.
FISHERIES RESEARCH
(2023)
Article
Fisheries
Regitze B. C. Lundgreen, Anders Nielsen, Mikael van Deurs, Hans Jakob Olesen, Monica Mion, Stefanie Haase, Michele Casini, Uwe Krumme, Karin Huessy
Summary: Sustainable management of fish stocks requires understanding the stock structure and connectivity of habitats. Cod in the Sound in the western Baltic Sea display complex connectivity patterns with the neighbouring stock in Kattegat. Historical tagging data and contemporary growth data were used to assess the ecological connectivity between the Sound and Kattegat, revealing considerable connectivity during the spawning season. The findings emphasize the need for further examination of the stock structure of cod in the western Baltic and adjacent areas.
FISHERIES RESEARCH
(2023)
Article
Fisheries
Brian Petrie, Kenneth T. Frank, William C. Leggett
Summary: The North Atlantic Fisheries Organization imposed an 11-year moratorium on directed fishing for cod in response to a rapid decline of the Flemish Cap cod stock. The stock showed characteristics of spawning stock biomass, maturity-at-age, weight-at-age, and recruitment, suggesting phenotypic plasticity played a role in the stock's recovery. The broader fish community followed a similar temporal progression, highlighting the cod's key ecosystem position.
CANADIAN JOURNAL OF FISHERIES AND AQUATIC SCIENCES
(2022)
Article
Fisheries
Brian Petrie, Kenneth T. Frank, William C. Leggett
Summary: The North Atlantic Fisheries Organization responded to the decline of the Flemish Cap cod stock by imposing a long period of fishing moratorium, which led to the recovery of the stock. The recovery process of the stock was characterized by changes in spawning stock biomass, maturity-at-age, weight-at-age, and recruitment, suggesting the presence of phenotypic plasticity. The decline and partial recovery of the neighboring Northern Cod stock followed a similar pattern, possibly influenced by prey species decline and the apparent collapse of capelin as a major dietary component.
CANADIAN JOURNAL OF FISHERIES AND AQUATIC SCIENCES
(2022)
Article
Biodiversity Conservation
Amanda K. Pettersen, Ezequiel M. Marzinelli, Peter D. Steinberg, Melinda A. Coleman
Summary: The study evaluated the effectiveness of MPAs in preserving fish zeta diversity in Batemans Marine Park, Australia. Results showed that MPAs had a greater stability in fish species turnover compared to partially protected and unprotected areas, with significantly shallower decline in zeta diversity and higher retention of harvested species. The protective effects of MPAs were observable within 4 years of implementation, while partial protection showed little improvement in stability compared to unprotected areas.
CONSERVATION BIOLOGY
(2022)
Article
Engineering, Environmental
Tore Soderqvist, Hanna Nathaniel, Daniel Franzen, Frida Franzen, Linus Hasselstrom, Fredrik Grondahl, Rajib Sinha, Johanna Stadmark, Asa Strand, Ida Ingmansson, Sofia Lingegard, Jean-Baptiste Thomas
Summary: Utilizing beach-cast harvesting can help mitigate marine eutrophication and provide blue biomass raw material, as demonstrated by cost-benefit analysis of harvest activities on Gotland Island. The lessons learned from these activities can be utilized to develop concrete guidelines for sustainable harvest practices, with attention to both local conditions and broader national and international contexts.
Article
Water Resources
Bernhard Aichner, Timo Rittweg, Rhena Schumann, Sven Dahlke, Svend Duggen, David Dubbert
Summary: River estuaries are special areas where freshwater and marine water masses mix. This study evaluated the seasonal and spatial dynamics of isotopes in three estuarine lagoons along the coast of northern Germany. The findings reveal strong seasonality in isotope values and a correlation between salinity and water stable isotopes, with some variations in different seasons and locations.
HYDROLOGICAL PROCESSES
(2022)
Article
Ecology
M. J. Rees, N. A. Knott, T. R. Davis, A. R. Davis, S. Gudge, J. M. Neilson, L. C. Fetterplace, A. Jordan
Summary: Remote oceanic islands with marine parks are crucial for conserving biodiversity, but assessments of their effectiveness over time showed no significant differences in fish assemblages between management zone types, indicating the relatively healthy condition of the marine park.
REGIONAL STUDIES IN MARINE SCIENCE
(2021)
Article
Environmental Sciences
Johan Blomquist, Frank Jensen, Staffan Waldo, Ola Flaaten, Maija K. Holma
Summary: This paper presents a simple theoretical model for the joint management of marine mammals and fish species, using cod and grey seals in the Nordic-Baltic Sea countries as an empirical case. The study shows that the optimal grey seal population is significantly lower than the actual population, regardless of variations in relevant parameters. This result can be attributed to the higher profit from harvesting cod compared to the net benefits from grey seals.
NATURAL RESOURCE MODELING
(2022)
Article
Biology
Amel Ghouali, Ali Moussaoui, Pierre Auger, Tri Nguyen Huu
Summary: This paper proposes to study a fishery model with variable price. The study is conducted using a simplified two-dimensional model and considers two main scenarios. The possible effects of creating marine protected areas on fish stock and fishery are evaluated. The results show that marine protected areas can contribute to the restoration of fish stocks by destabilizing the catastrophic equilibrium and stabilizing a sustainable fishery equilibrium.
JOURNAL OF BIOLOGICAL SYSTEMS
(2022)
Article
Engineering, Marine
M. Vishnu, S. Surendran
Summary: This study proposes a procedure for determining optimal design parameters and target reliability based on Life Cycle Cost (LCC) analysis. An iterative design process is utilized for different levels of reserve strength ratios (RSR) to calculate the LCC. The study includes a case study for offshore wind turbine support structures and uses static pushover analysis to determine the ultimate capacity, with optimization done using a particle swarm algorithm. The optimal design is reached based on a set of LCC values, which consider capital expenditure, operational costs, and risk costs.
SHIPS AND OFFSHORE STRUCTURES
(2021)
Article
Evolutionary Biology
Terry D. Beacham, Colin G. Wallace, Kim Jonsen, Brenda McIntosh, John R. Candy, Katherine Horst, Cheryl Lynch, David Willis, Wilf Luedke, Lee Kearey, Eric B. Rondeau
Summary: The Wild Salmon Policy in Canada aims to protect and restore healthy Pacific salmon populations, with genetic stock identification (GSI) and parentage-based tagging (PBT) offering an effective alternative to coded-wire tag-based (CWT) assessment and management for Chinook salmon fisheries. GSI and PBT provide high-resolution estimates of stock composition and fishery exploitation rates, making them a cheaper and more efficient method for Canadian-origin Chinook salmon assessment compared to CWTs.
EVOLUTIONARY APPLICATIONS
(2021)
Article
Green & Sustainable Science & Technology
Amol Kamalakar Bhalerao, Livia Rasche, Juergen Scheffran, Uwe A. Schneider
Summary: India's monsoon dependent agriculture is vulnerable to climate change, with most farmers in the Northeastern Region perceiving its impacts. Strategic interventions and holistic support programs are needed to raise awareness and facilitate farm adaptations.
INTERNATIONAL JOURNAL OF SUSTAINABLE DEVELOPMENT AND WORLD ECOLOGY
(2022)
Article
Ecology
Yannis Hatzonikolakis, Kostas Tsiaras, George Tserpes, Stylianos Somarakis, Michael A. St John, Panagiota Peristeraki, Dionysios E. Raitsos, George Triantafyllou
Summary: The Wisconsin type bioenergetics model was developed to study the growth and reproduction of Mediterranean swordfish. The model showed that swordfish growth and reproduction are largely controlled by consumption and respiration parameters, and each individual is reproductively active for about 15 days with a spawning season lasting around 90 days. The model outputs of annual egg production aligned with observation data, emphasizing the importance of bioenergetics in swordfish reproduction.
MARINE ECOLOGY PROGRESS SERIES
(2021)
Article
Ecology
Livia Rasche, Jan C. Habel, Nigel Stork, Erwin Schmid, Uwe A. Schneider
Summary: This study aims to investigate whether the remaining potentially arable areas of natural intact vegetation (rNIV) in 9 out of 35 global biodiversity hotspots will be converted to agriculture by 2050, and examine the impact of a healthy diet on this threat. The results show that while a healthy diet may protect rNIV in many hotspot regions, it actually puts more pressure on rNIV in other regions.
GLOBAL ECOLOGY AND BIOGEOGRAPHY
(2022)
Article
Green & Sustainable Science & Technology
Katrina Chan, Markus Millinger, Uwe A. Schneider, Daniela Thraen
Summary: This study analyzes the impact of diet shifts on greenhouse gas emissions, energy use, and land use in Germany. The findings show that changing diets can reduce these impacts, and utilizing freed-up land for afforestation or biomethane production can further reduce emissions. However, trade-offs with biodiversity and ecosystem services should be considered.
JOURNAL OF CLEANER PRODUCTION
(2022)
Article
Green & Sustainable Science & Technology
Livia Rasche, Uwe A. Schneider, Jan Steinhauser
Summary: The sustainability of the food and land use system in Germany can be achieved through dietary changes and agricultural area transformation, but this requires the collective efforts of stakeholders from various sectors.
SUSTAINABILITY SCIENCE
(2023)
Article
Environmental Sciences
Khondokar H. Kabir, Sourav Sarker, Mohammed Nasir Uddin, Holli R. Leggette, Uwe A. Schneider, Dietrich Darr, Andrea Knierim
Summary: This study aims to investigate the motivating factors and barriers to the adoption of floating agriculture in the wetland areas of Bangladesh. The results indicate that education, training, credit, communication behavior, trialability and observability, and complexity in practicing floating agriculture are motivating factors. However, climatic factors and non-climatic factors hinder the adoption of floating agriculture.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2022)
Article
Multidisciplinary Sciences
Asbjorn Christensen, Jens Murawski, Jun She, Michael St. John
Summary: This study simulated the spatial distribution and dynamics of macro plastic in the Baltic Sea using a new Lagrangian approach called DRRS. The simulations were based on mapping the macro plastic sources and five years of wind, wave, and current data. The model setup was validated against beach litter observations and showed significant temporal and spatial variability in plastic concentrations. The study also found that litter sorting patterns are observable in many coastal and offshore environments.
Article
Agriculture, Multidisciplinary
Sabine Egerer, Andrea Fajardo Puente, Michael Peichl, Oldrich Rakovec, Luis Samaniego, Uwe A. Schneider
Summary: This study examines the impact of irrigation on potato yields in Northeast Lower Saxony, Germany, and finds that irrigation can help reduce the yield losses caused by climate change, but its capacity is limited. Strengthening efforts to mitigate climate change may be more effective in preventing potato yield losses.
AGRICULTURAL SYSTEMS
(2023)
Article
Environmental Sciences
Lea S. Schroeder, Livia Rasche, Kerstin Jantke, Gaurav Mishra, Stefan Lange, Annette Eschenbach, Uwe A. Schneider
Summary: This study examines the combined effects of climate change and agricultural intensification on soil erosion in uphill shifting cultivation systems. The results show a significant nonlinear relationship between global warming and erosion. Steep slopes require longer fallow periods to maintain current erosion levels.
LAND DEGRADATION & DEVELOPMENT
(2023)
Editorial Material
Environmental Sciences
George Triantafyllou, George Triantaphyllidis, Annika Pollani, Jun She, Joydeep Dutta, Michael St. John, Marco Faimali, Roy Brouwer, Pavel Stoev
FRONTIERS IN MARINE SCIENCE
(2023)
Article
Environmental Sciences
Philip A. H. Smith, Kristian Aa. Sorensen, Bruno Buongiorno Nardelli, Anshul Chauhan, Asbjorn Christensen, Michael St John, Filipe Rodrigues, Patrizio Mariani
Summary: This study proposes a convolutional neural network method for reconstructing vertical profiles of temperature and salinity using remotely-sensed surface measurements and in situ vertical profiles. The model is trained on satellite and in situ data from the Atlantic Ocean, and the results show improved performance compared to current state-of-the-art methods. This approach can be easily extended to other basins or the global ocean.
FRONTIERS IN MARINE SCIENCE
(2023)
Article
Environmental Sciences
Anshul Chauhan, Philip A. H. Smith, Filipe Rodrigues, Asbjorn Christensen, Michael St. John, Patrizio Mariani
Summary: Warm temperature anomalies in the global ocean are increasing and may have consequences on marine ecosystems. This study analyzes the distribution and dynamics of marine heat waves (MHWs) and evaluates their impacts on phytoplankton communities. The findings suggest that different drivers can generate MHWs, leading to varied effects on phytoplankton dynamics across different ocean regions.
FRONTIERS IN MARINE SCIENCE
(2023)
Article
Multidisciplinary Sciences
Livia Rasche, Joscha N. Becker, Percy Chimwamurombe, Annette Eschenbach, Alexander Groengroeft, Jihye Jeong, Jona Luther-Mosebach, Barbara Reinhold-Hurek, Abhijit Sarkar, Uwe A. Schneider
Summary: Cowpeas in sub-Saharan Africa exhibit increased yields when inoculated with efficient rhizobial strains, especially in favorable climatic conditions. However, the advantages of using inoculated seeds are reduced in very dry and hot years. Simulations show that average yield differences between non-inoculated and inoculated cowpeas range from 0.1 t/ha to over 1 t/ha depending on the climate scenario. Therefore, the effectiveness of inoculated cowpea seeds is more pronounced in the near future compared to the far future when instances of dry and hot years are expected to increase.
SCIENTIFIC REPORTS
(2023)
Article
Environmental Sciences
Lea S. Schroeder, Amol K. Bhalerao, Khondokar H. Kabir, Juergen Scheffran, Uwe A. Schneider
Summary: Tribal farmers in the Himalayas are vulnerable to climate change, but little is known about their adaptation decisions. This study provides empirical evidence on the adaptation decisions of tribal farmers in the Himalayas, highlighting the importance of agricultural training in increasing the adoption of soil and water conservation practices. Factors such as participation in civil society organizations, livestock ownership, high-altitude locations, and perception of increased droughts also influence adaptation decisions. The main motivations for adoption are improving livelihoods, sustaining natural resources, reducing workload, and preserving cultural aspects of cultivation.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2024)
Article
Environmental Sciences
Leonel Lara-Estrada, Livia Rasche, Uwe A. Schneider
Summary: Rising air temperatures are the main reason for the expected reduction in land suitability for coffee cultivation in Central America. Adjusting shade levels could alleviate future high temperatures, but it may also negatively affect coffee yields.
CLIMATE RISK MANAGEMENT
(2023)
