Arquivos de Ciências do Mar最新文献

{"title":"TOLERANCE OF FRESHWATER BIVALVE Cyanocyclas brasiliana (Deshayes, 1854) TO THE VARIATION OF SALINITY IN LABORATORY CONDITIONS","authors":"C. Brito, Ronaldo Gomes de Sousa, Diego Rial Conde, C. Rocha-Barreira","doi":"10.32360/acmar.v55i1.62686","DOIUrl":"https://doi.org/10.32360/acmar.v55i1.62686","url":null,"abstract":"The species Cyanocyclas brasiliana (Deshayes, 1854) is endemic to South America and occurs in northern Brazil, in the state of Amazonas, Pará and Piauí. The present study was carried out in the Parnaíba River estuary, Piauí, Brazil. The objective of this study was to verify the tolerance limit and survival of the freshwater bivalve Cyanocyclas brasiliana submitted to an increasing salinity gradient under laboratory conditions. The specimens (19.49 to 26.47 mm) were kept in containers with 2 liters of water with constant aeration and at a density of 2.5 animals per liter. 7 treatments (salinities of 0, 1, 2, 3, 4, 5 and 6) were performed with 5 replicates per treatment. In the first 36 hours there was no death of any individual; mortality started after 48 hours at 3, 4, 5 and 6‰; it was more significant from 72 to 96 hours for treatments ranging from 2 to 6‰ and every specimen for treatments of 2 and 3‰ died from 120 to 144 hours. LC50 ranges from 3.1 at 72 h and 3.3 at 84 h, so the limiting average salinity was 3.2‰ and this species is characterized as stenohaline. Lethal death time (LT50) was: 81.8, 82.3, 78.5, 61.1 and 63.5 h for salinities of 2, 3, 4, 5 and 6‰ respectively. This species does not support great variations in salinity under experimental conditions, being well adapted to survive in salinities between 0 and 1. \u0000Keywords: endemic, mortality, survival","PeriodicalId":410099,"journal":{"name":"Arquivos de Ciências do Mar","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122360456","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"EFEITO PANDÊMICO NO AMBIENTE MARINHO: UMA PERCEPÇÃO MULTISSETORIAL E TRANSVERSAL","authors":"Verônica Soares Melo, Rafaela Torres Pereira, Paula Caetano Zama","doi":"10.32360/acmar.v55i1.71109","DOIUrl":"https://doi.org/10.32360/acmar.v55i1.71109","url":null,"abstract":"O homem e o mar possuem uma relação histórica de trocas nem sempre positiva para ambos os lados, com um cenário que comumente sofre alterações locais. No atual contexto da pandemia de covid-19, efeitos no ambiente marinho podem ser observados. Este trabalho teve como objetivo proporcionar um panorama inicial e geral sobre os efeitos pandêmicos na vida marinha e ambientes costeiros do Brasil. Para isso, realizamos um clipping científico, a coleta de depoimentos de profissionais engajados e atuantes nas questões relacionadas ao oceano e a avaliação dos boletins de lixo nas praias do litoral norte de São Paulo. A clipagem evidenciou aspectos positivos e negativos do efeito pandêmico, alguns dos quais foram discutidos em conteúdos de divulgação científica, com mais de 50 mil visualizações na rede social Instagram. Os depoimentos evidenciaram alguns efeitos causados pela pandemia no território brasileiro, disponibilizando informações ainda não publicadas sobre os benefícios e desafios enfrentados em cada região. Já a análise da presença de lixo nas praias evidenciou a chegada do lixo pandêmico nesses locais, apontando feriados como datas de pico na observação de máscaras nas praias. Apesar de em diversos setores a pandemia ter se demonstrado tanto benéfica quanto maléfica ao ambiente e à vida marinha, os efeitos negativos impactaram em níveis mais profundos e duradouros. \u0000Palavras-chave: impactos ambientais, pandemia, vida marinha, ambientes costeiros, covid-19.","PeriodicalId":410099,"journal":{"name":"Arquivos de Ciências do Mar","volume":"165 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122991701","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"FLOATING TEACHING LABORATORY: PRACTICE AS A TEACHING QUALIFICATION","authors":"D. Calazans","doi":"10.32360/acmar.v55iespecial.78184","DOIUrl":"https://doi.org/10.32360/acmar.v55iespecial.78184","url":null,"abstract":"The importance of the ocean as an economic source for humanity has been standing out for decades. Ocean study is an example of multi- and interdisciplinary science that includes studies on physical, chemical, and geological variables such as ocean currents, temperature, light, salinity, dissolved nutrients, organic and inorganic particles, and studies of organisms that inhabit from its surface to the deep sea. The data used in oceanographic studies are obtained through various instruments and collection techniques. This multidisciplinarity results in the need to use a vessel as a laboratory where it is possible to integrate all these components. \u0000Keywords: marine science, vessel, training, instruments, data.","PeriodicalId":410099,"journal":{"name":"Arquivos de Ciências do Mar","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-03-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126544258","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"EDITORIAL: A homage to the past aiming at the future","authors":"S. Rossi, Luiz Carlos Cotovicz Jr., Paulo Henrique Gomes de Oliveira Sousa, Tallita Cruz Lopes Tavares, Carlos Eduardo Peres Teixeira","doi":"10.32360/acmar.v55iespecial.78606","DOIUrl":"https://doi.org/10.32360/acmar.v55iespecial.78606","url":null,"abstract":"Are the oceans dying? This is a question that many people are asking themselves more and more insistently. The answer is that in no case are they dying – but they are being transformed. Deeply. Unfortunately, this transformation has changed the ocean for a worst stage in terms of overall quality. Human-induced changes across the globe affect marine more than terrestrial ecosystems. And, at sea, there is a problem: because it is not our environment, it is not easy for us to see what is happening. However, make no mistake: oceans connect all continents and have a profound impact on the terrestrial ecosystem as well. All over the world, the disappearance of large predators (whales, sharks, tuna fish, turtles, seals, swordfish, etc.), as well as the drastic reduction in many living structures on the seabed (coral reefs, algae meadows and higher plants, deep corals, etc.), has led entire ecosystems to change and achieve a new balance on the basis of abundant small organisms and accelerated life. And there is more: persistent pollution, both chemical and biological, and the “not fully understood but certain” effects of climate change may be adding to the plight of our oceans as we know them. Unfortunately, we cannot claim to know the full impact that such changes may have on the entire system, on the functioning of our planet, and on our own survival. In fact, ocean science is still dealing with several challenges to understand the largest area of the world, their needs and priorities, as well as potential solutions.","PeriodicalId":410099,"journal":{"name":"Arquivos de Ciências do Mar","volume":"69 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-03-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116780540","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"COASTAL OCEAN ACIDIFICATION IN BRAZIL: A BRIEF OVERVIEW AND PERSPECTIVES","authors":"Luiz Carlos Cotovicz Jr., Rozane Valente Marins, G. Abril","doi":"10.32360/acmar.v55iespecial.78514","DOIUrl":"https://doi.org/10.32360/acmar.v55iespecial.78514","url":null,"abstract":"This perspective paper aims at presenting the current knowledge on the processes of ocean acidification (OA) and coastal acidification (CA) in the Brazilian coastal ocean. We define and differentiate the processes of OA and CA: the first driven by the actual global increase of atmospheric carbon dioxide (CO2); the second driven by a combination of ocean uptake of atmospheric CO2 and other local/regional chemical additions or subtractions in aquatic ecosystems at the land-ocean interface. Regarding OA, we have centered our analysis on the data available for the main water masses along the Brazilian coast: South Atlantic Central Water (SACW), Tropical Water (TW), and Coastal Water (CW). The few data available for the shallow coastal waters (< 200 m depth) of the continental shelf reveal an increase in the anthropogenic component of the total dissolved inorganic carbon (DIC) pool in the SACW, with a decline in the ocean pH (over two decades; 1993-2013), and in the saturation state of calcium carbonate (CaCO3) minerals. We could not find OA trends for TW and CW because no data was available. Overall, the colder water masses (SACW, Plata Plume) have lower buffering capacity and simulations show that will potentially experience earlier negative OA impacts than the warmer waters masses (TW, Amazon Plume). Regarding CA, we have identified some local/regional studies investigating the carbonate chemistry in nearshore/estuarine ecosystems, particularly on the quantification of sources and sinks of CO2 , and determining short-term variabilities. Apparently, spreading coastal eutrophication in Brazil can enhances or reduces the process of OA, depending on the net ecosystem metabolism in combination with other chemical alterations. However, we could not find medium-long term acidification trends due to the limited data. There is a limited capacity to produce long time-series of carbonate chemistry parameters in key ecosystems and regions along the Brazilian coast. This lack of past information hinders and impairs the scientific community for identifying potential patterns of acidification along the Brazilian coast. We call for an urgent action in Brazil, with emphasis on the establishment of moored buoys/stations and/or scientific programs in the long term with continuous, real-time measurements of the main carbonate chemistry parameters. \u0000Keywords: ocean acidification, coastal acidification, coastal eutrophication, continental shelf, Southwestern Atlantic Ocean","PeriodicalId":410099,"journal":{"name":"Arquivos de Ciências do Mar","volume":"437 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-03-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132077747","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"LITERATURE REVIEW OF CORAL REEF RESTORATION IN AND AROUND THE CORAL TRIANGLE FROM THE VIEWPOINT OF MARINE BIODIVERSITY","authors":"James Davis Reimer, Ritzelle L. Albelda, Piera Biondi, Eko Hardianto, Shuyin Huang, Giovanni Diego Masucci, Sherry Lyn G. Sayco, Hin Boo Wee, Yafan Zhu","doi":"10.32360/acmar.v55iespecial.78183","DOIUrl":"https://doi.org/10.32360/acmar.v55iespecial.78183","url":null,"abstract":"The coral reefs of the Coral Triangle and nearby marine regions are the most biodiverse marine ecosystems in the world, providing ecosystem services to hundreds of millions of people. However, like coral reefs in other regions, these ecosystems are in decline due to a myriad of anthropogenically-induced stressors. To mitigate this decline, active coral reef restoration efforts have been increasing worldwide, including in this region. An important end-goal of coral reef restoration is the conservation of functional biodiversity of not only zooxanthellate scleractinian corals, but of all associated coral reef organisms. In this literature review, we collected papers from the Web of Science (1995-2021) focused specifically on coral reef restoration from six countries and regions around the Coral Triangle (Japan, Taiwan, mainland China, Philippines, Malaysia, Indonesia) to examine how much coral reef restoration research has been performed in each area, when it was performed, what methodologies were used, what organisms were targeted, and whether any assessment of biodiversity was included. Our results show great disparity in the research efforts of each area, with the Philippines clearly leading research in the region with almost half of the literature examined, followed by Japan and Indonesia, with nascent efforts in mainland China, Taiwan, and Malaysia. Overall, for the region, research appears to be increasing with time. Research in most areas was concentrated in one or two locations, and almost exclusively focused only on corals. Only approximately 38% of papers mentioned biodiversity in any manner, and only 14% included organisms other than scleractinian corals in their results. It is clear from this review that extensive research and data gaps exist regarding coral reef restoration in the western Pacific and Coral Triangle, particularly from the viewpoint of biodiversity. It is hoped that research can address these gaps before coral reef ecosystems in the region decline even further. \u0000  \u0000Keywords: coral reef ecosystems, knowledge gaps, East Asia, South-East Asia, Indo-Pacific.","PeriodicalId":410099,"journal":{"name":"Arquivos de Ciências do Mar","volume":"46 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-03-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132221108","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"SPREADING EUTROPHICATION AND CHANGING CO2 FLUXES IN THE TROPICAL COASTAL OCEAN: A FEW LESSONS FROM RIO DE JANEIRO","authors":"G. Abril, Luiz C. Cotovicz Jr., A. Nepomuceno, Thaís Erbas, S. Costa, Vinicius V. Ramos, G. Moser, A. Fernandes, Eduardo Negri, Bastiaan A. Knoppers, N. Brandini, W. Machado, Marcelo Bernardes, V. Vantrepotte","doi":"10.32360/acmar.v55iespecial.78518","DOIUrl":"https://doi.org/10.32360/acmar.v55iespecial.78518","url":null,"abstract":"In Brazil and in many other tropical countries, large urban cities and populations are still growing on the coast and coverage in terms of sewage treatments is far from desirable. Cultural eutrophication is not solely a threat for the coastal ocean; it is now acting as one of its major biogeochemical and ecological driver. Along the littoral of the state of Rio de Janeiro, semi-enclosed marine bays and lagoons show clear spatial and temporal pattern of increasing concentrations of chlorophyll a (Chl a), organic carbon, and nutrients in their waters and sediments in urbanized regions. Acting as a buffer, the nearshore ecosystems have turned highly eutrophic and their autotrophic metabolism has been enhanced creating strong carbon dioxide (CO2) sinks. We compile here data of CO2fluxes recently gathered in four coastal marine ecosystems in the state of Rio de Janeiro: the Guanabara Bay and the Araruama, Saquarema and Jacarepagua lagoons. We observed intense CO2 sources in restricted areas at the vicinity of sewage loads, where microbial degradation of organic matter predominates, and large CO2 sinks in confined and nearshore brackish, marine and hypersaline waters, where phytoplankton blooms occur. We also report a correlation across the four ecosystems between the partial pressure of CO2 in waters and the Chl a concentration. Chl a satellite data all along the Brazilian coast suggest that the CO2 sink induced by eutrophication probably occurs in many coastal ecosystems including bays, lagoon and shelf waters, and could contribute to an additional blue carbon. Part of the additional organic carbon is stored in sediments, and part is exported offshore. However, this additional blue carbon has dramatic environment impacts as it would evolve toward the formation of marine dead zones, and could contribute to a production of methane (CH4) a more powerful greenhouse gas. We emphasize an urgent need for multidisciplinary research to promote simultaneously the storage of atmospheric carbon, and the preservation of biodiversity and socio-economic goods in the eutrophic tropical coastal ocean. \u0000Keywords: tropical coastal ecosystems, cultural eutrophication, phytoplankton blooms, marine dead zones, blue carbon","PeriodicalId":410099,"journal":{"name":"Arquivos de Ciências do Mar","volume":"74 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-03-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127044615","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"LABOMAR: 60 years of service to society","authors":"Maria Ozileia Bezerra Menezes, Lidriana de Souza Pinheiro","doi":"10.32360/acmar.v55iespecial.78609","DOIUrl":"https://doi.org/10.32360/acmar.v55iespecial.78609","url":null,"abstract":"A group of visionary and enthusiastic people started a great project 60 years ago. Led by the young professor Melquíades Pinto Paiva, alongside the biologist Rui Simões de Menezes and the pioneering team of students formed by Hermínia de Castro Holanda, José Fausto Filho, Maria Ivone Mota and Vicente Araújo Barreto, they created the Marine Biology Station at the Federal University of Ceará (UFC), today called Labomar. This project was supported by Dean Antônio Martins Filho, the first dean of the UFC. Nowadays, we are privileged to participate in the celebration of the first 60 years of Labomar and to have the opportunity to write some reflections in this regard.","PeriodicalId":410099,"journal":{"name":"Arquivos de Ciências do Mar","volume":"41 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-03-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123087150","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"POTENTIAL AND REALIZED DIVERSITY OF COASTAL PLANKTON: THE ROLE OF RESTING STAGES IN ECOSYSTEM FUNCTIONING","authors":"G. Belmonte, F. Rubino","doi":"10.32360/acmar.v55iespecial.78207","DOIUrl":"https://doi.org/10.32360/acmar.v55iespecial.78207","url":null,"abstract":"Resting stages are the strategy for species to avoid the variability of environmental conditions. In coastal confined marine habitats, variability of conditions is higher than in the open sea, and bottoms accumulate plankton resting stages in the so-called “marine cyst banks”. The benthic-pelagic coupling generated by this bi-location of plankton, however, is not clearly evident for all the involved species. This result is due to the still scant knowledge of the life cycles and life histories of single species. The study of plankton dynamics from the benthos point of view is useful and informative and it increases the potential complexity of a planktonic community in a confined area. \u0000Keywords: plankton, life cycles, resting stages, cysts, benthic-pelagic coupling, resurrection ecology.","PeriodicalId":410099,"journal":{"name":"Arquivos de Ciências do Mar","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-03-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128126207","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"OCEAN MODELLING IN BRAZIL, A QUICK OVERVIEW","authors":"M. Marta‐Almeida","doi":"10.32360/acmar.v55iespecial.78208","DOIUrl":"https://doi.org/10.32360/acmar.v55iespecial.78208","url":null,"abstract":"Hydrodynamic numerical modelling studies, at least partially focused on the Brazilian oceanography, were identified using the Scopus database. Ocean modelling in Brazil started in 1994 and has been increasing especially since 2007. In recent years, however, the rate of the increase is slowing. The main ocean models used are ROMS, POM and HYCOM, and the main institutions publishing in ocean modelling in Brazil are located in the states of São Paulo and Rio de Janeiro, resulting in the Southeast as the most studied region. Men dominate the ocean modelling in Brazil, with only three women in the top twenty scientists. Oil industry is a great sponsor of oceanography in Brazil. The interest in renewable energy offshore is, on the other hand, very low, with only two publications assessing the potential for renewable energy extraction from the ocean. \u0000  \u0000Keywords: ocean modelling, Brazil, models, regions, authors.","PeriodicalId":410099,"journal":{"name":"Arquivos de Ciências do Mar","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-03-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133961951","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}