Ocean & Coastal Management最新文献

{"title":"Use and transformation of beaches as a tourism resource by promoters and managers in oceanic islands. A conflict for geoheritage conservation and social preferences in the canary islands","authors":"","doi":"10.1016/j.ocecoaman.2024.107378","DOIUrl":"10.1016/j.ocecoaman.2024.107378","url":null,"abstract":"<div><p>In the case of the Canary Islands (Spain), human occupation on beaches has generated environmental and landscape transformations and a loss of their geoheritage values. In this sense, this archipelago could be a good example to demonstrate the paradigm at the regional scale at first and island scale at second, that the colour and composition of the beaches are determinant for urban-tourist development. The beaches with the colour and composition that managers and promoters prefer most are those that have withstood the greatest anthropogenic pressure, and may lead to socio-environmental conflicts. For this, the aim of this work is to characterize and identify beach typologies according to their sedimentological characteristics, the degree of urban-tourist occupation, and the environmental changes and artificialisation that have taken place over the last sixty years in the beaches of La Palma, Tenerife and Fuerteventura. For this purpose, the General Catalogue of Beaches and Maritime Bathing Areas (the latter were excluded from the study) issued by the Canary Islands Government was used. This source was spatially and statistically analysed using a Geographic Information System (GIS) and related to socio-environmental variables extracted from geo-referenced sources. Orthophotos from 1957 and more recent years were also used for the historical characterization. Finally, this information was contrasted with social preferences, obtained from online surveys, about the physical configuration of Canarian beaches. Results show that the quantity and distribution of beach types (grain size and beach colour) differ for each island, and that beach use depends on its typology, with sandy beaches being the most used as an urban-tourist resource and pebble-cobble beaches the most transformed to respond to sand beach user demand. These and other factors that have affected the evolution of these beaches and the degree of conservation of their natural functions and geoheritage values are discussed. The responses to the survey show significant patterns related to user profile and preferences regarding the beach environment and recreational services. The importance of social preferences and beach transformation is discussed to understand the evolution of beach management in the Canary Islands and the identified conflicts.</p></div>","PeriodicalId":54698,"journal":{"name":"Ocean & Coastal Management","volume":null,"pages":null},"PeriodicalIF":4.8,"publicationDate":"2024-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S0964569124003636/pdfft?md5=dd8f86be4c7bbea29fb350d199511230&pid=1-s2.0-S0964569124003636-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142241633","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Is my fishing gear impacting the habitat? An impact assessment in four fisheries in the Northwest Mexican Pacific","authors":"","doi":"10.1016/j.ocecoaman.2024.107358","DOIUrl":"10.1016/j.ocecoaman.2024.107358","url":null,"abstract":"<div><p>The impacts of fishing activities on habitats for commercially important species may, directly and indirectly, influence species and associated communities. These effects include those on target species, bycatch species, habitats, etc. In this study, the impact of small-scale fisheries on habitats was evaluated in four fishing communities from the Northwest Mexican Pacific. The species and size selectivity of several fishing gear were evaluated, and the spatial distribution of catches was studied to assess the impacts of fishing gear using a Consequence Spatial Analysis (CSA). Our results showed that in finfish fisheries from Guaymas and Isla Natividad, the catch of the target species represents more than 75% of the total catch and in El Rosario, the catch represents less than 50%. We assessed 42 habitat types in four communities, which were qualified with low-risk scores. The fishing gears used to target commercial species are selective to optimal sizes above their maturity size. The results contribute to improving management in data-poor fisheries by evaluating the impacts of fishing on habitats and discussing their relevance for implementation.</p></div>","PeriodicalId":54698,"journal":{"name":"Ocean & Coastal Management","volume":null,"pages":null},"PeriodicalIF":4.8,"publicationDate":"2024-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142241630","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Integrating issue-oriented solution of marine spatial planning (MSP): A case study of Koh Sichang in Thailand","authors":"","doi":"10.1016/j.ocecoaman.2024.107381","DOIUrl":"10.1016/j.ocecoaman.2024.107381","url":null,"abstract":"<div><p>As an effective means of coordinating sea use conflicts and promoting ecological conservation, Marine Spatial Planning (MSP) has been well-known by more and more countries. The study has developed an issue-oriented solution for Koh Sichang and its surrounding sea areas in Thailand. Through multi-source data collection and on-site survey, the characteristics of abundant coral reef resources, numerous waterways and mooring areas have been identified. Then, corresponding thematic studies and zoning were conducted, including cassava scatter risk prediction, habitat risk assessment, demarcation of aquaculture priority areas, and scenario analysis. The results show that: (1) Cassava powder accumulates northeast of Koh Sichang and adjacent areas and distributes as high as 84%, with significant diffusion under south wind. Suggest strengthening maritime transport supervision; (2) Human activities have led to a 100% moderate risk for coral reefs around Koh Sichang. While under conservation pattern, the proportion could be reduced to 30%, highlighting the urgency of protective measures; (3) Contrasting the protection and development patterns reveals the double-edged sword effect of the development of tourism and transportation industries on the environment, emphasizing the need to uphold the concept of sustainable development and ecosystem-based management.</p></div>","PeriodicalId":54698,"journal":{"name":"Ocean & Coastal Management","volume":null,"pages":null},"PeriodicalIF":4.8,"publicationDate":"2024-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142241629","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Commercial fishing vessels as marine-based sources of plastic pollution: The Namibian perspective","authors":"","doi":"10.1016/j.ocecoaman.2024.107376","DOIUrl":"10.1016/j.ocecoaman.2024.107376","url":null,"abstract":"<div><p>Plastic pollution in the marine ecosystem and their sources have been widely investigated, however some parts of the world remain under studied. Herein, we report on plastic pollution in the Namibian marine ecosystem, based on data collected by fisheries observers between 2003 and 2020 during commercial fishing activities. A total of 79 plastic pollution incidents were reported between 2003 and 2020, which consisted of unspecified non-biodegradable objects (55.7%), unspecified plastic items (25.3%), fishing gear (8.9%), plastic bottles (5.0%), plastic gloves (1.3%) and single-use plastic bags (3.8%). We found no significant Pearson correlation between the number of disposal incidents and the fisheries observer coverage (r = 0.3254, df = 14, p = 0.2187). The spatial analysis in the disposal of non-biodegradable objects show a fair distribution along the Namibian coast with more concentrations around latitude 18⁰S, 22⁰S, and 26⁰S. We conclude that fishing vessels are important marine-based sources of plastic pollution, highlighting a continuous need to raise awareness over the fishing industry, in particular seafarers, on plastic use and management. The study expands the plastic pollution knowledge by quantifying incidents of plastic pollution, plastic litter composition, and identifying spatial distribution in the Namibian waters, thus, to the best of our knowledge, represents a baseline for studies on marine plastic pollution in this oceanic region. Identifying sources of marine plastic litter and providing a spatial picture is a step closer to develop and implement specific regulatory tools to combat marine pollution.</p></div>","PeriodicalId":54698,"journal":{"name":"Ocean & Coastal Management","volume":null,"pages":null},"PeriodicalIF":4.8,"publicationDate":"2024-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142230555","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Security risk assessment of submerged floating tunnel based on fault tree and multistate fuzzy Bayesian network","authors":"","doi":"10.1016/j.ocecoaman.2024.107355","DOIUrl":"10.1016/j.ocecoaman.2024.107355","url":null,"abstract":"<div><p>To assess the global security risks of the submerged floating tunnel (SFT) in marine environments during operation and provide a basis for risk control, a security risk assessment method using a multistate fuzzy Bayesian network (MFBN) considering complex disaster-inducing factors is proposed. A fault tree model of SFT security risk is established to analyze the causal relationships between global risk and influence factors such as structural components and environmental loads. For root nodes, fuzzy probabilities for each state are obtained through expert knowledge. An improved similarity aggregation method is proposed to integrate expert opinions, mitigating the impact of significant option discrepancies. For non-root nodes, the Leaky Noisy-Max model is used to calculate complex conditional probabilities within the SFT. The probabilities of various security risk states and key risk factors could be determined through reasoning by MFBN. Additionally, a risk prediction method that incorporates domain expert opinions and leverages the BN's ability of updating node probabilities with new information was developed to forecast the security risks of the SFT under wave and current loads.</p></div>","PeriodicalId":54698,"journal":{"name":"Ocean & Coastal Management","volume":null,"pages":null},"PeriodicalIF":4.8,"publicationDate":"2024-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142230552","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Optimization of shipping freight forwarding services considering consumer rebates under the impact of carbon tax policy","authors":"","doi":"10.1016/j.ocecoaman.2024.107361","DOIUrl":"10.1016/j.ocecoaman.2024.107361","url":null,"abstract":"<div><p>Maritime carbon emissions, contributing to approximately 2.89% of global anthropogenic CO₂ emissions, have prompted governments to actively promote a low-carbon shift in the freight forwarding sector. The effect of carbon tax implementation on guiding freight forwarders towards offering more eco-friendly freight forwarding services and facilitating a low-carbon transition remains unclear. This study categorizes freight forwarding services models based on delivery speed, ranging from fast to slow, and environmental friendliness, from low to high. It examines scenarios involving a singular carbon tax and consumer rebates, establishing a freight forwarder model without carbon tax constraints (N-T model), a singular carbon tax model for freight forwarders (C-T model), and a combined carbon tax-consumer rebate model (C-C model). The findings suggest that carbon tax pressures from regulatory bodies ultimately affect consumers; thus, under tax cost pressures, freight forwarders must adapt their shipping strategies. A shift towards more eco-friendly freight forwarding services occurs if the rate of demand growth is less than the increase in fixed delivery costs, and an optimal tax rate can drive this shift. Conversely, when the perceived rebate difference between any two services surpasses a certain threshold, eco-friendly freight forwarding services are consistently favored. In the absence of such conditions, a well-designed carbon tax policy is essential to steer freight forwarders toward reducing carbon emissions.</p></div>","PeriodicalId":54698,"journal":{"name":"Ocean & Coastal Management","volume":null,"pages":null},"PeriodicalIF":4.8,"publicationDate":"2024-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142230554","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Integrating UAV imagery and machine learning via Geographic Object Based Image Analysis (GEOBIA) for enhanced monitoring of Yucca gloriosa in Mediterranean coastal dunes","authors":"","doi":"10.1016/j.ocecoaman.2024.107377","DOIUrl":"10.1016/j.ocecoaman.2024.107377","url":null,"abstract":"<div><p>Effective monitoring and early detection of invasive alien plant species (IAPs) are crucial for mitigating their spread and safeguarding native habitats. Unmanned Aerial Vehicles (UAVs) offer a cost-efficient solution, providing high resolution images. In this study, we aimed to develop a semi-automated methodology using a machine learning algorithm, spatial metrics, and clustering techniques on UAV images to monitor, map, and suggest management measures to counteract <em>Yucca gloriosa</em>, an invasive plant colonizing coastal fixed dunes in central Italy.</p><p>UAV flights were conducted using two drones: one for the visible spectrum and the other for multispectral bands (Blue, Green, Red, Red Edge, and Near Infrared) along with a Digital Surface Model (DSM). Derived vegetation indices were also utilized. For mapping <em>Y. gloriosa</em> distribution, a Geographic Object Based Image Analysis (GEOBIA) approach was applied to the orthophoto segmentation, followed by a Random Forest algorithm in a training phase, considering three variable combinations (DSM + vegetation indices, DSM + spectral bands, DSM + mixed variables). The most accurate <em>Y. gloriosa</em> map was used to suggest management measures combining the spatial pattern of invaded patches (size, height, isolation level, and aggregation degree) and a mixed clustering approach (hierarchical and partitioning).</p><p>The results highlighted that the most accurate prediction map was based on the DSM + mixed variables dataset, showing the important role of using a combination of spectral bands and vegetation indices. In all three cases, the DSM emerged as the pivotal variable for discriminating <em>Y. gloriosa</em> from the surrounding environment. Additionally, our results demonstrate the advantages of incorporating vegetation indices in discerning the target invasive alien plant (IAP) from the broader environment, particularly considering its distinctive photosynthesis process and biomass production. From a managerial standpoint, our pilot study indicates that the UAV-based mapping methodology represents an optimal balance between field efforts and costs. This approach allows for the precise identification of containment and removal areas of <em>Y. gloriosa</em>, without compromising the accuracy of the method. The generated prediction maps also hold potential significance for the conservation of coastal dune ecosystems, providing a promising tool for the effective management of invasive species and biodiversity conservation by suggesting management measures for <em>Y. gloriosa</em>.</p></div>","PeriodicalId":54698,"journal":{"name":"Ocean & Coastal Management","volume":null,"pages":null},"PeriodicalIF":4.8,"publicationDate":"2024-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S0964569124003624/pdfft?md5=49f1ac947a3d92402e6b4e4d3c173245&pid=1-s2.0-S0964569124003624-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142230551","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Fishers' perception and activity shifts in a dolphin bycatch mitigation context","authors":"","doi":"10.1016/j.ocecoaman.2024.107375","DOIUrl":"10.1016/j.ocecoaman.2024.107375","url":null,"abstract":"<div><p>Fishing exclusion zones aim to reduce cetacean bycatch, but often neglect social and ecological side effects, exacerbating social injustices and reshaping fishing practices. We present a case study of an endangered population of Lahille's bottlenose dolphins (<em>Tursiops truncatus gephyreus</em>) in a Brazilian coastal lagoon, known for its unique cooperation with net-casting fishers. However, the local small-scale fisheries (SSF) also employ other fishing gears that contribute to dolphin bycatch, prompting the enforcement of a fishing ban in the area. We investigated fishers' socioeconomic conditions, evidence of social disparities, perceptions on dolphin bycatch, and projected changes on fisheries activities to understand the repercussions of the ban. We categorized 128 surveyed fishers into five groups based on socioeconomic factors and their reliance on dolphin-cooperative and gillnet fisheries. Our findings revealed significant disparities in social capital among fishers and their different attitudes towards dolphin bycatch, highlighting unforeseen consequences. To investigate how fishers would likely shift fishing practices, we considered two management scenarios: 1) should dolphin-fishing cease due to unsuccessful bycatch mitigation, fishing efforts would shift towards shrimp trawling, seine nets, and gillnet effort; 2) if gillnet-fishing is successfully banned as a bycatch mitigation measure, a shift to shrimp trawling and cast net effort. Both scenarios would intensify pressure on shrimp stocks, which are already heavily exploited in this socioecological system. Our research underscores the importance of contemplating alternatives to achieve sustainable outcomes when designing bycatch mitigation measure. Furthermore, our results point to the importance of a participatory governance approach, grounded in the socioeconomic context, to safeguard the livelihoods of small-scale fishers and foster broader conservation efforts beyond species-specific concerns.</p></div>","PeriodicalId":54698,"journal":{"name":"Ocean & Coastal Management","volume":null,"pages":null},"PeriodicalIF":4.8,"publicationDate":"2024-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142172454","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Surf zone hazards before and after a beach nourishment in Virginia, USA","authors":"","doi":"10.1016/j.ocecoaman.2024.107367","DOIUrl":"10.1016/j.ocecoaman.2024.107367","url":null,"abstract":"<div><p>Beach nourishment is the leading coastal protection technique in the United States to combat erosion, enhance resilience to storm surge, and maintain recreational value. Despite these benefits, anecdotal reports suggest that beach nourishments elevate the surf zone hazard to beach patrons by steepening the beach face and altering the shoreface morphology such that conditions are more favorable for rip current formation. This study analyzes lifeguard rescue reports collected on the United States Atlantic Coast before and after a 2019 beach nourishment in Virginia Beach, Virginia, to assess whether the nourishment was correlated with an increased hazard to beach patrons. The data indicate that regardless of nourishment status, rescues were most probable during periods of high rip current probability (moderate to large wave heights and low-obliquity wave angles), along with low water level. To formally quantify pre-versus post-nourishment hazards, the proportion of rescues observed in nourished versus unnourished beach zones was compared with bootstrapped distributions of the pre-nourishment rescue proportions. Although the proportion of rescues in the nourished section of the beach exceeds the pre-nourishment average, it is not outside the overall range of pre-nourishment values obtained by random resampling. Consequently, there is insufficient evidence to conclude that the existing coastal management beach nourishment strategy increased the hazard to beach patrons at Virginia Beach.</p></div>","PeriodicalId":54698,"journal":{"name":"Ocean & Coastal Management","volume":null,"pages":null},"PeriodicalIF":4.8,"publicationDate":"2024-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S0964569124003521/pdfft?md5=d83601ff0bbdbe850114b63cbe50ce65&pid=1-s2.0-S0964569124003521-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142230553","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Spatial and seasonal variation in zooplankton dynamics in Parangipettai coastal waters Southeast coast of India","authors":"","doi":"10.1016/j.ocecoaman.2024.107365","DOIUrl":"10.1016/j.ocecoaman.2024.107365","url":null,"abstract":"<div><p>The distribution and composition of zooplankton are influenced by a combination of physico-chemical and biological processes, which in turn have effects on the entire ecosystem. In this study, the influence of environmental factors on zooplankton diversity in mangrove-estuarine coastal waters of Parangipettai, southeast coast of India, was investigated. Water samples were collected for a period of four years from January 2014 to December 2017. Totally, 145 species of zooplankton were recorded with highest belonging to the Arthropoda (63.21%) followed by Protozoa (10.53%), Cnidaria (7.95%), Urochordata (6.03%), Chordata (2.92%), Chaetognatha (2.62%), Mollusca (2.42%), Echinodermata (1.14%), Annelida (1.05%), Brachiopoda (1.01%), Ctenophora (0.57%) and Phoronida (0.55%). The findings of cluster, MDS, Factor analysis and CCA showed that variations in nutrient concentration may significantly alter the biotic community of zooplankton species. Furthermore, site score confirmed the effect of environmental conditions on zooplankton distribution. The result of TRIX showed the dry seasons are classified as scarcely eutrophied whereas wet seasons as moderately eutrophied. The findings of this study offer enhanced insight into how physico-chemical factors interact and vary over space and time, which is crucial for evaluating the effects of climate change on ecosystem services mediated by zooplankton.</p></div>","PeriodicalId":54698,"journal":{"name":"Ocean & Coastal Management","volume":null,"pages":null},"PeriodicalIF":4.8,"publicationDate":"2024-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142171669","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}