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1.
Tour Stud ; 24(2): 133-151, 2024 Jun.
Article in English | MEDLINE | ID: mdl-38817670

ABSTRACT

Answering Huijbens and Jóhannesson's call to investigate tourist destination development through a relational ontology marked by a vital materialism, this paper focuses on the creation of the Muraka. The Muraka is the underwater villa of the Conrad Maldives Rangali Island-an ultra-luxury resort located in Alifu Dhaalu Atoll. No social scientific research has ever been conducted at underwater hotels. Drawing upon fieldwork at the Muraka-part of a broader project on three underwater hotels (conducted in Singapore, Tanzania, and the Maldives), we aim to contribute original knowledge to more-than-human geographies and tourist studies by bringing attention to the architectural relations that entangle underwater hotels with their environments. In doing so we become attuned to more-than-human lives and create narratives that can help us imagine new relations with the planet both within and beyond the realm of tourist encounters. By focusing in particular on the creation of the Muraka through the lens of the original concept of alloutopia, we contribute to non-representational and more-than-human perspectives on tourism.

2.
BMC Public Health ; 24(1): 1166, 2024 Apr 25.
Article in English | MEDLINE | ID: mdl-38664794

ABSTRACT

BACKGROUND: Suboptimal glycemic control of type 2 diabetes mellitus (T2DM) which is defined as having HbA1c greater than 7% is a major public health problem in several countries, including the Maldives. The study aimed to estimate the prevalence and determine factors associated with suboptimal glycemic control among T2DM patients. METHODS: A hospital-based cross-sectional was applied to collect data from T2DM patients who attended public hospitals in the Greater Male' Region, Maldives where were one of the highest reports of T2DM and suboptimal glycemic control cases in the country between January to March 2023 by a validated questionnaire and anthropometric measurements. Five (5) ml blood specimens were collected to measure the glycated hemoglobin (HbA1c) level. Univariable and multivariable logistic regressions were employed to determine factors associated with suboptimal glycemic control of T2DM at a significant level of α = 0.05. RESULTS: A total of 341 participants were recruited for the study: 65.7% were female, 42.5% were aged 40-60 years, and 42.2% were married. The overall prevalence of suboptimal glycemic control was 50.7%. Ten variables were found to be associated with suboptimal glycemic control in multivariable logistic regression. Those aged 40-60 years (AOR = 3.35, 95% CI = 1.78-6.30), being single (AOR = 2.53, 95% CI = 1.21-5.30), preparation of food using more than three tablespoons of cooking oil (AOR = 2.78, 95% CI = 1.46-5.28), preparation of food with more than three tablespoons of sugar (AOR = 2.55, 95% CI = 1.31-4.93), no exercise (AOR = 2.04, 95% CI = 1.15-3.61), DM diagnosed with more than twenty years prior (AOR = 2.59, 95% CI = 1.34-4.99), obese body mass index (BMI) (AOR = 3.82, 95% CI = 1.75-8.32), high total cholesterol (AOR = 2.43, 95% CI = 1.36-4.35), high triglycerides (AOR = 3.43, 95% CI = 1.93-6.11), and high-level stress (AOR = 2.97, 95% CI = 1.48-5.93) were having a greater odds of having suboptimal glycemic control than those who did not have these characteristics. CONCLUSION: A large proportion of T2DM patients in the Greater Male' Region fail to control their blood glucose. Effective public health interventions should be introduced, especially interventions focused on reducing cooking oil and sugar in daily cooking practices, encouraging regular exercise, and maintaining cholesterol levels, particularly for those diagnosed with diabetes mellitus for more than 20 years prior.


Subject(s)
Diabetes Mellitus, Type 2 , Glycated Hemoglobin , Glycemic Control , Hospitals, Public , Adult , Aged , Female , Humans , Male , Middle Aged , Cross-Sectional Studies , Diabetes Mellitus, Type 2/epidemiology , Diabetes Mellitus, Type 2/blood , Glycated Hemoglobin/analysis , Glycemic Control/statistics & numerical data , Hospitals, Public/statistics & numerical data , Maldives/epidemiology , Prevalence , Risk Factors
3.
Chemosphere ; 356: 141781, 2024 May.
Article in English | MEDLINE | ID: mdl-38554875

ABSTRACT

At present the information regarding the occurrence of human pharmaceuticals (PhaCs) in coral reefs and their potential impacts on the associated fauna is limited. To optimize the collection of data in these delicate environments, we employed a solid-phase microextraction (bioSPME) and liquid chromatography coupled to tandem mass spectrometry (LC-MS/MS) procedure that enabled in vivo determinations in soft corals. Specifically, we researched the antibiotics Ofloxacin Sulfamethoxazole and Clarithromycin, the anti-inflammatory Diclofenac Propyphenazone Ketoprofen and Amisulpride, the neuroactive compounds Gabapentin-lactam, the beta-blocker Metoprolol and the antiepileptic Carbamazepine. Reproducibility was between 2.1% and 9.9% and method detection limits LODs) were between 0.2 and 1.6 ng/g and LOQs between 0.8 and 5.4 mg/g. The method was then applied to establish a baseline for the occurrence of these compounds in the Maldivian archipelago. Colonies of Sarcophyton sp. and Sinularia sp. were sampled along an inner-outer reef transect. Five of the ten targeted PhaCs were identified, and 40% of the surveyed coral colonies showed the occurrence of at least one of the selected compounds. The highest concentrations were found inside the atoll rim. Oxoflacin (9.5 ± 3.9 ng/g) and Ketoprofen (4.5 ± 2.3 ng/g) were the compounds with the highest average concentrations. Outside the atoll rim, only one sample showed contamination levels above the detection limit. No significant differences were highlighted among the two surveyed soft coral species, both in terms of average concentrations and bioconcentration factors (BCFs).


Subject(s)
Anthozoa , Environmental Monitoring , Solid Phase Microextraction , Tandem Mass Spectrometry , Water Pollutants, Chemical , Animals , Chromatography, Liquid , Water Pollutants, Chemical/analysis , Environmental Monitoring/methods , Anthozoa/chemistry , Pharmaceutical Preparations/analysis , Solid Phase Microextraction/methods , Humans , Indian Ocean Islands , Coral Reefs , Limit of Detection , Maldives , Liquid Chromatography-Mass Spectrometry
4.
PeerJ ; 11: e16071, 2023.
Article in English | MEDLINE | ID: mdl-38077433

ABSTRACT

Coral reefs are exposed worldwide to several global and local human pressures including climate change and coastal development. Assessing the effects of such pressures on coral reef communities and the changes they undergo over time is mandatory to understand their possible future trends. Nonetheless, some coral reefs receive no or little scientific attention, as in the case of Huvadhoo Atoll that is an under-studied region in the southernmost area of the Maldives (Indian Ocean). This study analyzes the changes occurring over time in eight coral reefs (four inner reefs within the atoll lagoon and four outer reefs on the ocean side) at Huvadhoo Atoll, firstly surveyed in 2009 and revisited in 2020 using the same field methods. The cover of 23 morphological benthic descriptors (including different growth forms of Acropora) was taken into account and then grouped into three categories (i.e., hard coral, other benthic taxa and abiotic descriptors) to analyze the change in the composition of the coral reef community. Significant changes (e.g., increase in hard coral cover and decrease in abiotic descriptors) were observed in the inner reefs as compared to the outer reefs, which showed less variability. A significant decrease in tabular Acropora cover was observed in both inner and outer reefs, with possible negative effects on reef complexity and functioning. By comparing two time periods and two reef types, this study provides novel information on the change over time in the community composition of Maldivian coral reefs.


Subject(s)
Anthozoa , Coral Reefs , Animals , Humans , Indian Ocean , Maldives , Climate Change
5.
PeerJ ; 11: e16315, 2023.
Article in English | MEDLINE | ID: mdl-37927798

ABSTRACT

Understanding patterns in coral reproductive biology at local and regional scales is crucial to elucidate our knowledge of characteristics that regulate populations and communities. The lack of published data on coral spawning patterns in the Maldives hinders our understanding of coral reproductive biology and limits our ability to assess shifts in reproductive phenology over time. Here we document baseline environmental cues, spawning patterns, exact timings and oocyte development of restored and wild Acropora, inhabiting shallow water reefs, across two Maldivian atolls. A total of 1,200 colonies were recorded spawning across the two sites between October 2021 and April 2023. These colonies represent 22 species of Acropora, with coral spawning observed over an extended period of eight months. This research details exact spawning times of multi-specific spawning, asynchronous spawning and 'split spawning' of Acropora, across multiple lunar phases; and highlights the need to consider restored colonies when discussing the sexual reproductive patterns of Maldivian Acropora in the future. Overall, corals spawned earlier in North Male Atoll compared with Baa Atoll. Earlier spawning events were significantly correlated with lower tide depths, wind speeds, daily precipitation and higher sea surface temperatures which helped explain inter-atoll, inter-annual, and intra-annual variations in spawning day. This study contributes to understanding sexual reproductive cycles of Acropora in the Maldives; knowledge that is vital for effective management of a critically endangered ecosystem in a changing climate.


Subject(s)
Anthozoa , Animals , Male , Anthozoa/physiology , Ecosystem , Coral Reefs , Reproduction/physiology , Wind
6.
GMS Hyg Infect Control ; 18: Doc22, 2023.
Article in English | MEDLINE | ID: mdl-37829254

ABSTRACT

Background: With the surge in the number of infected individuals during the COVID-19 pandemic, there was also a surge observed in the number of publications discussing its epidemiology, characteristics, path-o-phys-i-ol-o-gy, diagnosis, prevention and treatment. This bibliometric analysis focuses on the papers published on COVID-19 in South Asia. Methods: We searched articles in the Scopus database from December 2019 to October, 2022. After manual screening, a list of the 100 most-cited articles was obtained, which was analyzed for various factors, including the type of article, citation count, author's affiliation, country of origin, funding bodies, etc. Results: The majority of the top 100 articles (n=79) in South Asia were published during 2020. India was affiliated with the highest number of articles (n=68), followed by Bangladesh (n=18) and Pakistan (n=12). However, 7 articles were authored by a researcher in Bangladesh. Female authors were under represented (32.38%), with no female author in lists of authors with 4 or more articles. The average number of citations for each of the top 100 most-cited articles was 180.8. Original articles constituted the major portion of the publications (82%), followed by letters (11%) and reviews (4%). Half of the publications belonged to the field of medicine (n=49), while others were contributed by science, psychology, social sciences, and biochemistry and allied sciences (n=8). Vaccine trials were under-represented. Jahangirnagar University, Bangladesh was affiliated with the maximum number of articles. Most articles were published in Science of The Total Environment (n=8) while Indian Council of Medical Research (n=4) was the top funding body. Conclusion: These findings highlight that South Asia has a great potential to conduct research addressing its challenging health problems. But lack of funds hinders conducting trials of new medications and vaccines. Thus, there is need for allocation of sufficient funds for research and clinical trials by governments and the private sector to enhance the research productivity of this region.

7.
Cureus ; 15(9): e44931, 2023 Sep.
Article in English | MEDLINE | ID: mdl-37818521

ABSTRACT

Background Glaucoma is a progressive optic neuropathy characterized by visual field loss and potentially irreversible blindness, which poses a significant global health challenge. The Maldives, renowned for its unique geography and vibrant culture, faces unique challenges in healthcare access and delivery due to its scattered islands. Limited access to specialized healthcare services, coupled with cultural and socioeconomic factors, can contribute to disparities in glaucoma awareness and early detection. Understanding glaucoma awareness is paramount due to its potential impact on public health and the healthcare system. The aim of this study is to assess the awareness and knowledge about glaucoma among the citizens of Addu City, Maldives. Methods A cross-sectional study was conducted among 390 residents of Addu City, Maldives. The online survey questionnaire assessed demographic information, knowledge and awareness of glaucoma, and risk factors associated with the disease. Results The majority of participants (66.9%) had never heard of glaucoma. Among those who had heard of glaucoma, only 22.6% knew that it could cause irreversible blindness. Logistic regression analysis and multivariate analysis showed that age, gender, socioeconomic status, and education level were significantly associated with awareness and knowledge of glaucoma (p<0.05). Conclusion Findings suggest a high likelihood of low awareness and knowledge of glaucoma among residents of Addu City, Maldives. The study highlights the urgent need for policymakers, program implementers, and the health sector to conduct awareness programs in the community and provide facilities for annual eye examinations, as well as to organize systematic screening plans for glaucoma across the Maldives.

8.
Insects ; 14(8)2023 Jul 31.
Article in English | MEDLINE | ID: mdl-37623387

ABSTRACT

Megastigmidae comprises more than 200 species in 12 genera. Megastigmus has a worldwide distribution with more than 150 species. Over 80% of these species are recorded from the Australian and Palearctic region, with a few from Afrotropical and Oriental regions, but none from the Neotropical region. We describe a new species of Megastigmus obtained from the seeds of Pemphis acidula in the Maldives Archipelago. This is the first mention of Megastigmidae having as a host plant a species from Lythraceae. It is also the first recorded association of Chalcidoidea with the genus Pemphis and the first mention of Megastigmidae and Megastigmus in the Maldives Archipelago. We provide a detailed description of the species, focusing on its morphology, using both light microscopy and scanning electron microscopy (SEM). Megastigmus irinae Popescu n. sp. is a strictly phytophagous species, with each larva consuming a single seed. Currently, M. irinae is an endemic species found only in the Maldives Archipelago. However, considering the distribution of its host plant, P. acidula, which ranges from East Africa to Southeast Asia, Australia, Micronesia, and French Polynesia, we anticipate that future research could significantly expand the known range of this interesting new species.

9.
J Fish Biol ; 103(5): 1242-1247, 2023 Nov.
Article in English | MEDLINE | ID: mdl-37535422

ABSTRACT

Verified records of the bull shark Carcharhinus leucas are lacking in the Maldives. This study provides the first confirmed evidence of 23 sightings observed from 2013 to 2023 in the central and southern atolls of this archipelago. Most of the sightings occurred in close proximity to inhabited areas, where food waste is often discarded into the water, or in several dive sites, suggesting the presence of this species in different locations around central and southern atolls. Although further research is required to fully investigate the C. leucas population in the Maldives, this report documents and confirms its presence in this region.


Subject(s)
Refuse Disposal , Sharks , Animals , Indian Ocean , Food
10.
Sci Prog ; 106(2): 368504231179814, 2023.
Article in English | MEDLINE | ID: mdl-37345269

ABSTRACT

Mixed maritime disputes are maritime disputes that involve the concurrent consideration of any dispute concerning sovereignty or other rights over continental or insular land territory, which according to Article 298(1)(a)(i) of United Nations Convention on the Law of the Sea, should be excluded from the jurisdiction of a court or tribunal referred to in Article 287. However, by means of treaty interpretation or consensus of two parties, International Tribunal for the Law of the Sea and other Annex VII tribunals have increasingly broken through the limits to actively exercise jurisdiction. Judgements under the influence of this tendency will be firmly resisted by states whose sovereign interests are damaged. Moreover, these judgements will not only fail to resolve disputes, but will create more serious international law and international political disputes, such as the judgement on preliminary objections of Mauritius v. Maldives delimitation case. In this judgement, the Special Chamber of International Tribunal for the Law of the Sea circumvented the Monetary Gold principle by citing the International Court of Justice advisory opinion and United Nations General Assembly resolution, which had no legally binding force. It is proposed that this judgement could open Pandora's box of challenges to general principles of international law and jurisdiction over sovereignty disputes. For States with mixed maritime disputes to resolve the issues mentioned above, it is necessary to respond to lawsuits actively, avoid adverse consequences caused by default judgements and reach regional consensus, and avoid unfavourable International Court of Justice advisory opinions and United Nations General Assembly resolutions.


Subject(s)
Dissent and Disputes , Maldives
11.
Article in English | MEDLINE | ID: mdl-37372686

ABSTRACT

Adolescent pregnancy has important health and social implications. Despite the availability of nationally representative household survey data, there are limited studies that analyze factors associated with adolescent pregnancy across countries of South Asia. This study aimed to identify factors associated with adolescent pregnancy across South Asia. This study used the most recent Demographic and Health Survey (DHS) data from six countries in South Asia: Afghanistan, Bangladesh, India, the Maldives, Nepal, and Pakistan. Pooled individual record data from 20,828 ever-married women aged 15-19 years were used for the analysis. Multivariable logistic regression analysis, informed by the World Health Organization framework on social determinants of health, was performed to examine factors associated with adolescent pregnancy. Adolescent pregnancy was highest in Afghanistan compared to Bangladesh, Nepal, Pakistan, India, and the Maldives. Multivariable analyses confirmed that being from a poor household or male-headed household, increasing maternal age, having no access to newspapers, and having no knowledge of family planning were significantly associated with adolescent pregnancy. The use or intention to use contraceptives was protective against adolescent pregnancy. To reduce adolescent pregnancy in South Asia, interventions targeting adolescents from poor households with limited access to mass media should be considered, especially those from households with an existing patriarchal structure.


Subject(s)
Pregnancy in Adolescence , Pregnancy , Adolescent , Male , Humans , Female , Asia, Southern , Socioeconomic Factors , Bangladesh/epidemiology , India , Family Characteristics , Health Surveys
12.
Mar Pollut Bull ; 192: 115084, 2023 Jul.
Article in English | MEDLINE | ID: mdl-37257411

ABSTRACT

Tourism is the main income source for the Maldives, but concurrently, it represents a growing threat to its marine ecosystem. Here, we monitored the bioaccumulation of 15 emerging contaminants (ECs) in the Maldivian reef sponges Spheciospongia vagabunda collected in two resort islands (Athuruga and Thudufushi, Ari Atoll) and an inhabited island (Magoodhoo, Faafu Atoll), and we analysed their impact on different sponge cellular stress biomarkers. Caffeine and the insect repellent DEET were detected in sponges of all the islands, whereas the antibiotic erythromycin and the UV filter 4-methylbenzylidene camphor were found in resort islands only. Although concentrations were approximately a few ng/g d.w., we quantified various induced cellular effects, in particular an increase of the levels of the enzyme glutathione S-transferase involved in cell detoxification. Our results highlight the importance to increase awareness on ECs pollution, promoting the use of more environmental friendly products to achieving the sustainable development goals.


Subject(s)
Anthozoa , Coral Reefs , Animals , Ecosystem , Bioaccumulation , Tourism
13.
Int J Emerg Med ; 16(1): 31, 2023 May 01.
Article in English | MEDLINE | ID: mdl-37122000

ABSTRACT

BACKGROUND: Acute myocardial infarction (AMI) is the top cause of death in Maldives. Our study aims to determine the prehospital delay and its associated factors in AMI patients in Maldives. METHODS: A cross-sectional study was conducted with 127 patients, divided into early (≤ 6 h) and delayed (> 6 h) presenters to the hospital. The data collection for the study was carried out by interviewing AMI patients, focusing on their socio-demographic characteristics, coronary artery disease risk factors, clinical symptoms, situational factors, and behavioral and cognitive responses to symptoms. RESULTS: The median onset-to-door time was 230 (IQR 420) minutes. The mean age of AMI patients was 50.9 (SD ± 12.9) years old, and 39.4% of them had delayed presentation to the hospital. Smokers (adj OR = 0.3; 95% CI: 0.1, 0.9; P = 0.047) and those with previous episodes of chest pain or AMI (adj OR = 0.2; 95% CI: 0.03, 0.91; P = 0.038) were significant factors for early presentation to the hospital, while denial of symptoms (adj OR = 29.3; 95% CI: 1.6, 547.2; P = 0.024) and lack of knowledge (adj OR = 7.2; 95% CI: 1.77, 29.43; P = 0.006) led to a delayed decision to seek treatment. Situational factors such as onset at the workplace (adj OR = 5.8; 95% CI: 1.24, 26.83; P = 0.025) had lower odds of delay, whereas referral cases (adj OR = 7.7; 95% CI: 1.9, 30.94; P = 0.004) and use of sea ambulance (adj OR = 11.1; 95% CI: 2.8, 43.8; P = 0.001) were prone to delay in presentation to the hospital. CONCLUSION: Sea ambulance, referral cases, lack of knowledge, and denial of symptoms are significant factors associated with prehospital delay among patients with AMI. Public awareness about the benefits of early presentation and improvement of the means of transportation between islands is suggested to improve emergency cardiac care in the country.

14.
Disasters ; 47(4): 1069-1089, 2023 Oct.
Article in English | MEDLINE | ID: mdl-36813759

ABSTRACT

Large-scale disasters are frequently portrayed as temporally bounded, linear events after which survivors are encouraged to 'move on' as quickly as possible. In this paper, we explore how understandings of disaster mobilities and temporalities challenge such perspectives. Drawing on empirical research undertaken on Dhuvaafaru in the Maldives, a small island uninhabited until 2009 when it was populated by people displaced by the Indian Ocean tsunami of 2004, we examine what such understandings mean in the context of sudden population displacement followed by prolonged resettlement. The study reveals the diversity of disaster mobilities, how these reflect varied and complex temporalities of past, present, and future, and how processes of disaster recovery are temporally extended, uncertain, and often linger. In addition, the paper shows how attending to these dynamics contributes to understandings of how post-disaster settlement brings stability for some people while producing ongoing feelings of loss, longing, and unsettlement in others.


Subject(s)
Disasters , Humans , Maldives , Longitudinal Studies , Emotions , Survivors
16.
Int J Speech Lang Pathol ; 25(1): 52-57, 2023 02.
Article in English | MEDLINE | ID: mdl-36511713

ABSTRACT

PURPOSE: The United Nations adopted 17 Sustainable Development Goals (SDGs) in 2015 as a universal plan to address challenges experienced around the globe. SDG 4 focuses on inclusive and equitable education while SDG 10 aims to reduce inequality within and among countries. To achieve these goals for children with communication disabilities living in underserved communities, equitable access to services is required. Service delivery should be tailored to the unique characteristics of specific communities to best cater to the needs of the population. This commentary presents the Context-specific Service Delivery Framework (CSDF) that can be used to explore contexts systematically and identify suitable speech-language pathology service delivery approaches. CSDF focuses on the three dimensions of sustainability that are emphasised in the SDGs: environmental, social and economic. RESULT: We present how CSDF was developed in the case of one Majority world country, the Maldives. Five studies were conducted to complete CSDF and the findings were used to derive recommendations for service delivery approaches that could help achieve SDG 4 and SDG 10. These included, building capacity by using asset-based approaches, collaborating with service providers and the community, using population-based methods to focus on prevention of communication disabilities and using available technology to provide support. CONCLUSION: Other underserved communities could also benefit from using CSDF to design equitable services for children with communication disabilities in their countries. This commentary paper focuses on SDG 4 and SDG 10.


Subject(s)
Speech-Language Pathology , Sustainable Development , Child , Humans , Maldives , Global Health , United Nations
17.
Article in English | WPRIM (Western Pacific) | ID: wpr-998023

ABSTRACT

@#Introduction: The concept of interprofessional collaboration (IPC) is widely used in healthcare organizations, where patients are treated. However, there is no definite terminology that can explain the term IPC. The aim of this research is to understand nurses’ perception of IPC in Hospitals in the Maldives. Methods: A cross -sectional survey was conducted among 292 nurses from two hospitals followed by Focus Group Discussions with 5 nurses from each hospital. The instrument tool used for the survey was “conceptualization of interdisciplinary collaboration” by D’Amour which was adapted for this study with 9 items and an expert validated open ended questionnaire. Results: The findings from the study shows positive responses for IPC1-Disciplinary groups do exchange information 58.65% (n=171), IPC2- Share clinical decision making 60.3% (n=176), IPC3-Patient data are collectively reviewed 62.7% (n=183), IPC4- Supports each other in the multidisciplinary team 59.2% (n=173), IPC5 highest rate of positive response was for “IPC 6- conflict resolution which was 63.7% (n=186), IPC7- common care plan 63.0% (n=184), IPC8- Data collected at one point is shared with the team 57.5% (n=168) and the lowest was for “IPC 9- level of collaboration -56.8% (n=166) respectively. Conclusion: This study revealed that importance should be given to promoting a culture of interprofessional collaboration in the hospitals of Maldives. Therefore, there is a need to address this and implement IPC with respect to all professionals, by mitigating the hierarchical differences in the healthcare system. Thus, it is crucial to educate all HCPs with regard to sustaining IPC.

18.
PeerJ ; 10: e13644, 2022.
Article in English | MEDLINE | ID: mdl-35791363

ABSTRACT

The intensification of dredging and infilling activities in lagoons and on coral reefs are common practices in the Maldivian archipelago, and these activities alter the biodiversity of the bioconstructors and the functioning of the ecosystem. The alteration of environmental factors can also affect inconspicuous fauna, such as free-living nematodes. The implications of a reduction in biodiversity may transcend decreased taxonomic diversity, resulting in changes in functional diversity and redundancy; however, how the environmental conditions and human pressure affects the functionality of nematodes in Maldivian coral degradation zones (CDZs) remain poorly understood. In this paper, we examined changes in the taxonomic and functional diversity and the functional redundancy in nematode communities regarding the geographic location (atolls with various levels of human pressure), the exposure and topography of the reef (lagoon and ocean), the slope of the reef, and the depth. The functional diversity and redundancy were evaluated by considering two main biological traits of nematodes: i) the trophic strategy, and ii) the life strategy. The extremely high number of nematode genera observed in the Maldives is supported by the high complexity of the carbonate sediments. The reef exposure and depth were the most relevant environmental factors that influenced the taxonomic and functional diversity. The functional diversity, according to the trophic strategies, mirrored the taxonomic diversity because the adaptive plasticity of nematode buccal cavity structures is closely associated with the high biodiversity of the phylum. The high abundance of k-strategists in ocean reefs may indicate a higher ecological quality when compared to lagoon reefs; however, the absence of significant differences in life strategy functional diversity and functional redundancy indicates that a recovery process is underway. Analyses of nematode communities should be combined with standard investigations of reef bioconstructors during monitoring activities to assess the vulnerability of CDZ systems to future disturbances and facilitate the adoption of the most appropriate preventative actions.


Subject(s)
Anthozoa , Nematoda , Animals , Humans , Ecosystem , Coral Reefs , Biodiversity
19.
Mar Pollut Bull ; 180: 113773, 2022 Jul.
Article in English | MEDLINE | ID: mdl-35623215

ABSTRACT

The presence of microplastics in the world's oceans and their effects on marine habitats are highly concerning. As suspension-feeders, corals are very exposed to microplastics, compromising the health of coral reef ecosystems. In this study we surveyed for the first time the presence of microplastics in Maldivian reef-building corals. Aiming to determine the influence of exposure and depth on microplastic distribution, analyses were carried out on 38 individuals belonging to three different species. 58% of the investigated colonies resulted contaminated with particles within the 25-150 µm size range. The maximum concentration was encountered in a Pocillopora verrucosa colony sampled from a shallow inner reef (8.9 particles/g of coral). No significant differences in microplastic concentration were observed between different depths, exposures, sites and species. Overall, this study confirmed microplastic presence in coral reefs of the Maldivian archipelago including foundation species.


Subject(s)
Anthozoa , Animals , Coral Reefs , Ecosystem , Microplastics , Plastics/analysis
20.
Environ Pollut ; 292(Pt B): 118415, 2022 Jan 01.
Article in English | MEDLINE | ID: mdl-34718087

ABSTRACT

The cumulative impact of microplastic and organic enrichment is still largely unknown. Here, we investigated the microplastic contamination, the organic enrichment and their effects on meiofaunal distribution and diversity in two islands of the Maldivian archipelago: one more pristine, and another strongly anthropized. Field studies were coupled with manipulative experiments in which microplastic polymers were added to sediments from the non-anthropized island (i.e., without organic enrichment) to assess the relative effect of microplastic pollution on meiofauna assemblages. Our results reveal that the impact of microplastic contamination on meiofaunal abundance and taxa richness was more significant in the anthropized island, which was also characterized by a significant organic enrichment. Meiofauna exposed experimentally to microplastic contamination showed: i) the increased abundance of opportunistic nematodes and copepods and ii) a shift in the trophic structure, increasing relevance in epistrate-feeder nematodes. Based on all these results, we argue that the coexistence of chronic organic enrichment and microplastics can significantly increase the ecological impacts on meiofaunal assemblages. Since microplastic pollution in the oceans is predicted to increase in the next decades, its negative effects on benthic biodiversity and functioning of tropical ecosystems are expected to worsen especially when coupled with human-induced eutrophication. Urgent actions and management plans are needed to avoid the cumulative impact of microplastic and organic enrichment.


Subject(s)
Microplastics , Water Pollutants, Chemical , Animals , Biodiversity , Ecosystem , Environmental Monitoring , Geologic Sediments , Humans , Plastics , Water Pollutants, Chemical/analysis , Water Pollutants, Chemical/toxicity
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