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Ellwanger JH, Ziliotto M, Kulmann-Leal B, Chies JAB. Environmental Challenges in Southern Brazil: Impacts of Pollution and Extreme Weather Events on Biodiversity and Human Health. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2025; 22:305. [PMID: 40003530 PMCID: PMC11855841 DOI: 10.3390/ijerph22020305] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/26/2024] [Revised: 02/10/2025] [Accepted: 02/16/2025] [Indexed: 02/27/2025]
Abstract
The Amazon rainforest plays a fundamental role in regulating the global climate and therefore receives special attention when Brazilian environmental issues gain prominence on the global stage. However, other Brazilian biomes, such as the Pampa and the Atlantic Forest in southern Brazil, have been facing significant environmental challenges, either independently or under the influence of ecological changes observed in the Amazon region. The state of Rio Grande do Sul is located in the extreme south of Brazil and in 2024 was hit by major rainfalls that caused devastating floods. The Pampa is a non-forest biome found in Brazil only in Rio Grande do Sul. This biome is seriously threatened by loss of vegetation cover and many classes of pollutants, including pesticides and plastics. Mining ventures are also important sources of soil, water and air pollution by potentially toxic elements in Rio Grande do Sul, threatening both the Pampa and the Atlantic Forest. Furthermore, southern Brazil is often affected by pollution caused by smoke coming from fires observed in distant biomes such as the Pantanal and the Amazon. Considering the significant environmental challenges observed in southern Brazil, this article revisits the historical participation of Rio Grande do Sul in Brazilian environmentalism and highlights the main environmental challenges currently observed in the state, followed by an in-depth analysis of the effects of pollution and extreme weather events on biodiversity and human health in the region. This review encompassed specifically the following categories of pollutants: potentially toxic elements (e.g., arsenic, cadmium, chromium, cobalt, copper, lead, mercury, titanium), air pollutants, plastics, and pesticides. Pathogen-related pollution in the context of extreme weather events is also addressed. This article emphasizes the critical importance of often-overlooked biomes in Brazilian conservation efforts, such as the Pampa biome, while also underscoring the interconnectedness of climate change, pollution, their shared influence on human well-being and ecological balance, using Rio Grande do Sul as a case study.
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Affiliation(s)
| | | | | | - José Artur Bogo Chies
- Laboratory of Immunobiology and Immunogenetics, Postgraduate Program in Genetics and Molecular Biology (PPGBM), Department of Genetics, Institute of Biosciences, Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre 91501-970, Rio Grande do Sul, Brazil; (J.H.E.); (M.Z.); (B.K.-L.)
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Belli IM, Cavali M, Garbossa LHP, Franco D, Bayard R, de Castilhos Junior AB. A review of plastic debris in the South American Atlantic Ocean coast - Distribution, characteristics, policies and legal aspects. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 938:173197. [PMID: 38772490 DOI: 10.1016/j.scitotenv.2024.173197] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/28/2024] [Revised: 04/24/2024] [Accepted: 05/11/2024] [Indexed: 05/23/2024]
Abstract
The presence of plastics in the oceans has already become a pervasive phenomenon. Marine pollution by plastics surpasses the status of an emerging threat to become a well-established environmental problem, boosting research on this topic. However, despite many studies on the main seas and oceans, it is necessary to compile information on the South American Atlantic Ocean Coast to identify the lack of research and expand knowledge on marine plastic pollution in this region. Accordingly, this paper conducted an in-depth review of monitoring methods, sampling, and identification of macroplastics and microplastics (MPs) in water, sediments, and biota, including information on legal requirements from different countries as well as non-governmental initiatives. Brazil was the country with the highest number of published papers, followed by Argentina. MPs accounted for 75 % of the papers selected, with blue microfibers being the most common morphology, whereas PE and PP were the most abundant polymers. Also, a lack of standardization in the methodologies used was identified; however, the sites with the highest concentrations of MPs were the Bahía Blanca Estuary (Argentina), Guanabara Bay (Brazil), and Todos os Santos Bay (Brazil), regardless of the method applied. Regarding legislation, Uruguay and Argentina have the most advanced policies in the region against marine plastic pollution due to their emphasis on the life cycle and the national ban on certain single-use plastics. Therefore, considering its content, this expert review can be useful to assist researchers dealing with plastic pollution along the South American Atlantic Ocean Coast.
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Affiliation(s)
- Igor Marcon Belli
- Department of Sanitary and Environmental Engineering, Federal University of Santa Catarina, 88040-900 Florianópolis, Santa Catarina, Brazil.
| | - Matheus Cavali
- Department of Sanitary and Environmental Engineering, Federal University of Santa Catarina, 88040-900 Florianópolis, Santa Catarina, Brazil
| | | | - Davide Franco
- Department of Sanitary and Environmental Engineering, Federal University of Santa Catarina, 88040-900 Florianópolis, Santa Catarina, Brazil
| | - Rémy Bayard
- INSA Lyon, DEEP, UR7429, 69621 Villeurbanne, France
| | - Armando Borges de Castilhos Junior
- Department of Sanitary and Environmental Engineering, Federal University of Santa Catarina, 88040-900 Florianópolis, Santa Catarina, Brazil
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Garrard SL, Clark JR, Martin N, Nelms SE, Botterell ZLR, Cole M, Coppock RL, Galloway TS, Green DS, Jones M, Lindeque PK, Tillin HM, Beaumont NJ. Identifying potential high-risk zones for land-derived plastic litter to marine megafauna and key habitats within the North Atlantic. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 922:171282. [PMID: 38412875 DOI: 10.1016/j.scitotenv.2024.171282] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/16/2023] [Revised: 02/15/2024] [Accepted: 02/24/2024] [Indexed: 02/29/2024]
Abstract
The pervasive use of plastic in modern society has led to plastic litter becoming ubiquitous within the ocean. Land-based sources of plastic litter are thought to account for the majority of plastic pollution in the marine environment, with plastic bags, bottles, wrappers, food containers and cutlery among the most common items found. In the marine environment, plastic is a transboundary pollutant, with the potential to cause damage far beyond the political borders from where it originated, making the management of this global pollutant particularly complex. In this study, the risks of land-derived plastic litter (LDPL) to major groups of marine megafauna - seabirds, cetaceans, pinnipeds, elasmobranchs, turtles, sirenians, tuna and billfish - and a selection of productive and biodiverse biogenic habitats - coral reefs, mangroves, seagrass, saltmarsh and kelp beds - were analysed using a Spatial Risk Assessment approach. The approach combines metrics for vulnerability (mechanism of harm for megafauna group or habitat), hazard (plastic abundance) and exposure (distribution of group or habitat). Several potential high-risk zones (HRZs) across the North Atlantic were highlighted, including the Azores, the UK, the French and US Atlantic coasts, and the US Gulf of Mexico. Whilst much of the modelled LDPL driving risk in the UK originated from domestic sources, in other HRZs, such as the Azores archipelago and the US Gulf of Mexico, plastic originated almost exclusively from external (non-domestic) sources. LDPL from Caribbean islands - some of the largest generators of marine plastic pollution in the dataset of river plastic emissions used in the study - was noted as a significant input to HRZs across both sides of the Atlantic. These findings highlight the potential of Spatial Risk Assessment analyses to determine the location of HRZs and understand where plastic debris monitoring and management should be prioritised, enabling more efficient deployment of interventions and mitigation measures.
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Affiliation(s)
- Samantha L Garrard
- Plymouth Marine Laboratory, Prospect Place, The Hoe, Plymouth PL1 3DH, United Kingdom.
| | - James R Clark
- Plymouth Marine Laboratory, Prospect Place, The Hoe, Plymouth PL1 3DH, United Kingdom
| | - Nicola Martin
- Plymouth Marine Laboratory, Prospect Place, The Hoe, Plymouth PL1 3DH, United Kingdom
| | - Sarah E Nelms
- Centre for Ecology and Conservation, University of Exeter, Penryn, TR10 9FE, United Kingdom
| | - Zara L R Botterell
- Centre for Ecology and Conservation, University of Exeter, Penryn, TR10 9FE, United Kingdom
| | - Matthew Cole
- Plymouth Marine Laboratory, Prospect Place, The Hoe, Plymouth PL1 3DH, United Kingdom
| | - Rachel L Coppock
- Plymouth Marine Laboratory, Prospect Place, The Hoe, Plymouth PL1 3DH, United Kingdom
| | - Tamara S Galloway
- Biosciences, Geoffrey Pope Building, University of Exeter, Stocker Road, Exeter EX4 4QD, United Kingdom
| | - Dannielle S Green
- Applied Ecology Research Group, School of Life Sciences, Anglia Ruskin University, Cambridge CB1 1PT, United Kingdom
| | - Megan Jones
- Marine Biological Association of the United Kingdom, The Laboratory, Citadel Hill, Plymouth, PL1 2PB, United Kingdom
| | - Pennie K Lindeque
- Plymouth Marine Laboratory, Prospect Place, The Hoe, Plymouth PL1 3DH, United Kingdom
| | - Heidi M Tillin
- Plymouth Marine Laboratory, Prospect Place, The Hoe, Plymouth PL1 3DH, United Kingdom
| | - Nicola J Beaumont
- Plymouth Marine Laboratory, Prospect Place, The Hoe, Plymouth PL1 3DH, United Kingdom
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Baes L, Santiago CD, Roman L, Dos Santos Costa PC, Pugliesi É, Reigada C. Beached seabirds as plastic biomonitors in Brazil from the Beach Monitoring Project of the Santos Basin (PMP-BS). MARINE POLLUTION BULLETIN 2024; 199:115847. [PMID: 38181467 DOI: 10.1016/j.marpolbul.2023.115847] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/08/2023] [Revised: 06/24/2023] [Accepted: 11/24/2023] [Indexed: 01/07/2024]
Abstract
Bioindicator species are useful to monitor wildlife exposure to plastic pollution, and responses to plastic leakage and policy interventions. Here we explore the biomonitoring potential of different seabird and shorebirds species across six years of monitoring in Brazil. Using the necropsy stranding database of the Beach Monitoring Project of the Santos Basin (PMP-BS), we evaluated i) the frequency of birds-plastic interactions in Brazil; ii) whether plastic interactions have changed through time and in different coastal regions; and iii) potential bioindicators for monitoring the exposure of seabirds to plastic in the nearshore South Atlantic Ocean. We found 37 species that had ingested plastic, including ten new records, found that the rates of tube-nosed seabirds increased through time, and suggested two potential species. We discuss the potential for biomonitoring marine pollution in the South Atlantic Ocean using PMP-BS, providing a scheme for a better plastic pollution monitoring in Brazil.
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Affiliation(s)
- Laura Baes
- Programa de Pós-graduação em Ecologia e Recursos Naturais, Universidade Federal de São Carlos - UFSCar, Washington Luiz, s/n - Monjolinho, São Carlos, SP 13565-905, Brazil; Instituto de Pesquisas Cananéia, Av. Nina, 523 - Bairro Retiro das Caravelas, Cananéia, SP 11990-000, Brazil; Laboratório de Ecologia de Interações, Departamento de Ecologia e Biologia Evolutiva, Universidade Federal de São Carlos - UFSCar, Rod. Washington Luiz, s/n - Monjolinho, São Carlos, SP 13565-905, Brazil.
| | - Cristine Diniz Santiago
- Departamento de Ciências Ambientais, Universidade Federal de São Carlos - UFSCar, Washington Luiz, s/n - Monjolinho, São Carlos, SP 13565-905, Brazil
| | - Lauren Roman
- Institute for Marine and Antarctic Studies, University of Tasmania, Battery Point, Hobart, Tasmania 7004, Australia; CSIRO Oceans and Atmosphere, 3-4 Castray Esp, Battery Point, Hobart, Tasmania 7004, Australia
| | - Priscilla Carla Dos Santos Costa
- Instituto de Pesquisas Cananéia, Av. Nina, 523 - Bairro Retiro das Caravelas, Cananéia, SP 11990-000, Brazil; Laboratório de Patologia Comparada de Animais Silvestres FMVZ/USP, Universidade de São Paulo, Av. Prof. Dr. Orlando Marques de Paiva, 87, Cidade Universitária "Armando Salles de Oliveira", São Paulo, SP 05508-270, Brazil
| | - Érica Pugliesi
- Departamento de Ciências Ambientais, Universidade Federal de São Carlos - UFSCar, Washington Luiz, s/n - Monjolinho, São Carlos, SP 13565-905, Brazil
| | - Carolina Reigada
- Laboratório de Ecologia de Interações, Departamento de Ecologia e Biologia Evolutiva, Universidade Federal de São Carlos - UFSCar, Rod. Washington Luiz, s/n - Monjolinho, São Carlos, SP 13565-905, Brazil
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Xu J, Guo Y, Tan Z, Ban W, Tian J, Chen K, Xu H. Molecular cloning and expression analysis of rad51 gene associated with gametogenesis in Chinese soft-shell turtle (Pelodiscus sinensis). Gene 2023; 887:147729. [PMID: 37619650 DOI: 10.1016/j.gene.2023.147729] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2023] [Revised: 08/14/2023] [Accepted: 08/21/2023] [Indexed: 08/26/2023]
Abstract
Rad51 is a recA-like recombinase that plays a crucial role in repairing DNA double-strand breaks through homologous recombination during mitosis and meiosis in mammals and other organisms. However, its role in reptiles remains largely unclear. In this study, we aimed to investigate the physiological role of the rad51 gene in reptiles, particularly in Pelodiscus sinensis. Firstly, the cDNA of rad51 gene was cloned and analyzed in P. sinensis. The cloned cDNA contained an open reading frame (ORF) of 1020 bp and encodeed a peptide of 339 amino acids. The multiple alignments and phylogenetic tree analysis of Rad51 showed that P. sinensis shares the high identity with Chelonia mydas (97.95%) and Mus musculus (95.89%). Secondly, reverse transcription-polymerase chain reaction (RT-PCR) and real-time quantitative polymerase chain reaction (RT-qPCR) analysis showed that rad51 mRNA was highly expressed in both ovary and testis, while being weak in the somatic tissues examined in this study. Furthermore, chemical in situ hybridization (CISH) was performed to examine the expression profile of rad51 mRNA in germ cells at different stages. In the testis, rad51 mRNA expression was found to be stronger in the germ cells at early stages, specifically in spermatogonia and spermatocytes, but it was undetectable in spermatids. In the ovary, rad51 mRNA exhibited a uniform distribution in the cytoplasm of oocytes at early stages. The signal intensity of rad51 mRNA was highest in primary oocytes and gradually declined during oogenesis as the oocytes developed. These results suggest that rad51 plays a vital role in the development of germ cells, particularly during the early stages of gametogenesis in P. sinensis. The dynamic expression pattern of rad51 mRNA provides insights into the mechanisms underlying germ cell development and differentiation into gametes in turtles, even in reptiles.
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Affiliation(s)
- Jianfei Xu
- Key Laboratory of Freshwater Fish Reproduction and Development, Ministry of Education, Key Laboratory of Aquatic Sciences of Chongqing, College of Fisheries, Southwest University, Chongqing 402460, China
| | - Yonglin Guo
- Key Laboratory of Freshwater Fish Reproduction and Development, Ministry of Education, Key Laboratory of Aquatic Sciences of Chongqing, College of Fisheries, Southwest University, Chongqing 402460, China
| | - Zhimin Tan
- Key Laboratory of Freshwater Fish Reproduction and Development, Ministry of Education, Key Laboratory of Aquatic Sciences of Chongqing, College of Fisheries, Southwest University, Chongqing 402460, China
| | - Wenzhuo Ban
- Key Laboratory of Freshwater Fish Reproduction and Development, Ministry of Education, Key Laboratory of Aquatic Sciences of Chongqing, College of Fisheries, Southwest University, Chongqing 402460, China
| | - Jiaming Tian
- Key Laboratory of Freshwater Fish Reproduction and Development, Ministry of Education, Key Laboratory of Aquatic Sciences of Chongqing, College of Fisheries, Southwest University, Chongqing 402460, China
| | - Kaili Chen
- Key Laboratory of Freshwater Fish Reproduction and Development, Ministry of Education, Key Laboratory of Aquatic Sciences of Chongqing, College of Fisheries, Southwest University, Chongqing 402460, China
| | - Hongyan Xu
- Key Laboratory of Freshwater Fish Reproduction and Development, Ministry of Education, Key Laboratory of Aquatic Sciences of Chongqing, College of Fisheries, Southwest University, Chongqing 402460, China.
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Nóbrega DF, Marutani VHB, Alcala MM, de Lima Cesar de Albuquerque IG, Goldberg DW, Del Rio do Valle CM, Del Rio do Valle R. Systemic oxalosis in a free-ranging green turtle (Chelonia mydas). J Comp Pathol 2023; 201:13-15. [PMID: 36646034 DOI: 10.1016/j.jcpa.2022.12.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2022] [Revised: 08/29/2022] [Accepted: 12/01/2022] [Indexed: 01/15/2023]
Abstract
A female juvenile green turtle (Chelonia mydas), found alive in Guanabara Bay, Rio de Janeiro, Brazil, was weak, dehydrated and cachectic, with a healed fracture in the caudal portion of the carapace. Despite supportive treatment, the animal died after 9 days. At necropsy the main lesions were pallor of visceral organs, arthritis and deposits of whitish granular material in the wall of large arteries and the trachea. Histopathological analysis revealed mild to severe deposition of crystals, consistent with calcium oxalate, in both kidneys and the spleen, heart, small intestine, pancreas, thymus and salt gland, as well as bacterial meningitis, septic arthritis, spirorchidiasis and a fibropapilloma on the nictitating membrane. The main pathological findings were suggestive of septic shock, mainly due to the bacterial meningitis and septic arthritis, with systemic oxalosis and spirorchidiasis as contributing lesions. Although renal oxalosis has been described in green turtles as an incidental finding, presumably due to ingestion of oxalate-containing plants, this turtle had an unusual systemic deposition of oxalate crystals.
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Affiliation(s)
- Daniela F Nóbrega
- Pat Animal Laboratory, São José do Rio Preto, São Paulo, SP, Brazil.
| | | | | | | | | | | | - Rodrigo Del Rio do Valle
- Instituto Biopesca, Praia Grande, São Paulo, SP, Brazil; Health Science Institute, Paulista University, São Paulo, SP, Brazil
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Kolenda K, Kuśmierek N, Kujawa K, Smolis A, Wiśniewski K, Salata S, Maltz TK, Stachowiak M, Kadej M. Bottled & canned - Anthropogenic debris as an understudied ecological trap for small animals. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 837:155616. [PMID: 35504387 DOI: 10.1016/j.scitotenv.2022.155616] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/28/2021] [Revised: 04/11/2022] [Accepted: 04/26/2022] [Indexed: 06/14/2023]
Abstract
Nowadays, littering is one of the biggest challenges that environmental conservation is facing. Although beverage containers, such as bottles and cans, belong to the most common threats in this context, their effect on animals has been poorly studied. The aim of this study was to assess the diversity and mortality level of the animal taxa entering discarded containers and to investigate which container features influence the number and functional composition of the trapped animals. The study was conducted in 10 urban woodlands in the city of Wrocław, Poland. In total, 939 open containers were collected. In 56% of them, a total number of 10,162 dead individuals (10,139 invertebrates and 23 vertebrates) was found. The most common amongst them were insects (orders: Coleoptera, Diptera, Hymenoptera), malacostracans (Isopoda), arachnids (Opiliones, Sarcoptiformes) and gastropods (Stylommatophora). The number of dead animals was affected positively by the container capacity and was significantly higher in glass and plastic bottles when compared to aluminium cans. At the same time, the presence of a neck negatively affected the number of dead animals. Container capacity was also positively correlated with the abundance of the most common functional groups: predators, phytophages and saprophages. Moreover, colourless and green, but not brown, containers were a significant predictor for the abundance of the latter two groups. Our study revealed that discarded containers constitute an ecological trap for many groups of animals. There is an urgent need to reduce the amount of rubbish in the environment by, for example, the implementation of regional and international regulations addressing the problem of littering, or organising repeated clean-up and educational activities.
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Affiliation(s)
- Krzysztof Kolenda
- Department of Evolutionary Biology and Conservation of Vertebrates, Faculty of Biological Sciences, University of Wrocław, Sienkiewicza 21, PL-50-335 Wrocław, Poland.
| | - Natalia Kuśmierek
- Department of Parasitology, Faculty of Biological Sciences, University of Wrocław, Przybyszewskiego 63, PL-51-148 Wrocław, Poland
| | - Krzysztof Kujawa
- Statistical Analysis Centre, Wrocław Medical University, Marcinkowskiego 2-6, PL-50-368 Wrocław, Poland
| | - Adrian Smolis
- Department of Invertebrate Biology, Evolution and Conservation, Faculty of Biological Sciences, University of Wrocław, Przybyszewskiego 65, PL-51-148 Wrocław, Poland
| | - Konrad Wiśniewski
- Department of Zoology and Animal Physiology, Institute of Biology and Earth Sciences, Pomeranian University in Słupsk, Arciszewskiego 22a, PL-76-200 Słupsk, Poland
| | - Sebastian Salata
- Department of Biodiversity and Evolutionary Taxonomy, Faculty of Biological Sciences, University of Wrocław, Przybyszewskiego 65, PL-51-148 Wrocław, Poland
| | - Tomasz K Maltz
- Museum of Natural History, Faculty of Biological Sciences, University of Wrocław, Sienkiewicza 21, PL-50-335 Wrocław, Poland
| | | | - Marcin Kadej
- Department of Invertebrate Biology, Evolution and Conservation, Faculty of Biological Sciences, University of Wrocław, Przybyszewskiego 65, PL-51-148 Wrocław, Poland
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Rodríguez Y, Vandeperre F, Santos MR, Herrera L, Parra H, Deshpande A, Bjorndal KA, Pham CK. Litter ingestion and entanglement in green turtles: An analysis of two decades of stranding events in the NE Atlantic. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2022; 298:118796. [PMID: 35026323 DOI: 10.1016/j.envpol.2022.118796] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/21/2021] [Revised: 12/10/2021] [Accepted: 01/04/2022] [Indexed: 06/14/2023]
Abstract
Survivorship of early life stages is key for the well-being of sea turtle populations, yet studies on animals that distribute around oceanic areas are very challenging. So far, the information on green turtles (Chelonia mydas) that use the open NE Atlantic as feeding grounds is scarce. Strandings occurring in oceanic archipelagos can provide relevant information about the biology, ecology and current anthropogenic pressures for megafauna inhabiting the open ocean. In this study, we analysed stranding events of green turtles found in the Azores archipelago to investigate interactions with marine litter. In addition, we quantified and characterized litter items stranded on beaches to provide a direct comparison between the ingested items with the debris found in the environment. A total of 21 juvenile green turtles were found stranded in the region between 2000 and 2020 (size range: 12-49 cm, CCL). Overall, 14% of the animals were entangled in marine litter and 86% of the turtles necropsied had ingested plastic. The mean abundance of items ingested was 27.86 ± 23.40 and 98% were white/transparent. Hard plastic fragments between 1 and 25 mm were the most common shape recovered in the turtles, similarly to what was found on the coastline. All of the litter items analysed with pyrolysis GC-MS revealed to be polyethylene (PE). This study provides the first baseline assessment of interactions of plastic litter with juvenile green turtles found at the east edge of the North Atlantic Subtropical Gyre. The combination of these results supports the hypothesis that migratory megafauna that use remote oceanic islands as a feeding ground are exposed to anthropogenic litter contamination dominated by plastics, even when these regions are located far away from big industrial centers or populated cities.
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Affiliation(s)
- Yasmina Rodríguez
- Instituto de Investigação em Ciências do Mar - OKEANOS, Universidade dos Açores, 9900-138, HORTA, Portugal.
| | - Frederic Vandeperre
- Instituto de Investigação em Ciências do Mar - OKEANOS, Universidade dos Açores, 9900-138, HORTA, Portugal
| | - Marco R Santos
- Direção de Serviços de Biodiversidade e Política do Mar, Direção Regional dos Assuntos do Mar, Secretaria Regional do Mar e das Pescas, Colónia Alemã, Apartado 9, 9900-014, Horta, Faial, Portugal
| | - Laura Herrera
- Instituto de Investigação em Ciências do Mar - OKEANOS, Universidade dos Açores, 9900-138, HORTA, Portugal
| | - Hugo Parra
- Instituto de Investigação em Ciências do Mar - OKEANOS, Universidade dos Açores, 9900-138, HORTA, Portugal
| | - Ashok Deshpande
- NOAA Fisheries, Northeast Fisheries Science Center, James J. Howard Marine Sciences Laboratory at Sandy Hook, NJ, USA
| | - Karen A Bjorndal
- Archie Carr Center for Sea Turtle Research and Department of Biology, University of Florida, Gainesville, FL, 32611, USA
| | - Christopher K Pham
- Instituto de Investigação em Ciências do Mar - OKEANOS, Universidade dos Açores, 9900-138, HORTA, Portugal
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