Implications Of Climate Change Research Articles

Impact of Climate Change Adaptation Strategies on Food Security of Farm Households in Rural Dire Dawa Administration, Ethiopia

Background: The impact of climate change on smallholder farmers in underdeveloped countries—specifically, Ethiopia is widely recognized. Farm households employ a range of geographically and temporally varying adaptation strategies to cope with the adverse consequences of climate change. Therefore, it is critical to examine the few empirical studies that examine how rural Ethiopian farm households confronting drought have responded to climate change to ensure food security. Primary data were collected from 385 randomly selected farm households using a semi-structured survey form. Data analysis was performed using endogenous switching regression models and descriptive statistics. Result: Results show that the majority of the sample households (76.7%) adopted climate change adaptation strategies (livelihood diversification, soil and water conservation, and chemical fertilizers separately or in combination) while the remaining 23.3% are non-adopters. Climate change knowledge is validated as an instrumental variable. Model results revealed that adopter farmers would have significantly lower (11.6%) daily calorie intake if they had not adopted them, and non-adopter farmers would have gained significantly higher (12.8%) daily calorie intake if they had adopted them. Sex, marital status, land fragmentation, education, family size, farm size, credit access, extension contacts, and livestock ownership are significantly associated with the likelihood of adoption. Results also show systematic differences where the sex of the head variable is inversely related to the food security of adopters and vice versa for non-adopters. Conclusion: The majority of farm households in the study area know the implications of climate change (73.5%) and suffer from food insecurity (59%). Farmers' knowledge about climate change and variability varies, affecting social, economic, biophysical, and institutional issues. This was shown using descriptive statistics and OLM data. Farm households led by young, male farmers who are married, frequently interact with extension agents, have access to loans and information about climate change, and have non-fragmented plots possess greater knowledge about climate change than other households. Adaptation interventions should consider the above factors and heterogeneities to increase adoption and improve the food security of farm households in the study area.

The Sociological Implications of Climate Change: Community Adaptation and Resilience

Purpose: The general objective of the study was to explore the sociological implications of climate change, that is, community adaptation and resilience. Methodology: The study adopted a desktop research methodology. Desk research refers to secondary data or that which can be collected without fieldwork. Desk research is basically involved in collecting data from existing resources hence it is often considered a low cost technique as compared to field research, as the main cost is involved in executive’s time, telephone charges and directories. Thus, the study relied on already published studies, reports and statistics. This secondary data was easily accessed through the online journals and library. Findings: The findings reveal that there exists a contextual and methodological gap relating to the sociological implications of climate change. Preliminary empirical review revealed that sociological perspectives are crucial for understanding and addressing climate change challenges. It emphasized the significance of social capital, participatory approaches, and context-specific strategies in enhancing community resilience. By examining the interplay between social dynamics, power relations, and adaptive capacities, the study highlighted the importance of addressing socio-economic disparities and fostering collaboration among diverse stakeholders. Overall, it underscored the need for holistic and transformative approaches to climate change adaptation that integrate social, ecological, and economic dimensions. Unique Contribution to Theory, Practice and Policy: The Social Capital theory, Risk Society theory and Ecological Modernization theory may be used to anchor future studies on the sociological implications of climate change. The study provided valuable recommendations that contributed to theory, practice, and policy. It emphasized the integration of sociological perspectives into climate change adaptation, highlighting the role of social networks, cultural norms, and power dynamics. Practical implications included advocating for community-based approaches, participatory decision-making, and knowledge co-production activities. At the policy level, the study underscored the importance of mainstreaming social considerations into climate change policy frameworks, promoting equity and participatory governance. Recommendations for future research included exploring socio-economic drivers of vulnerability, conducting longitudinal studies, and advancing interdisciplinary research agendas to inform evidence-based strategies for building resilient communities.

Common use herbicides increase wetland greenhouse gas emissions

Wetlands play a disproportionate role in the global climate as major sources and sinks of greenhouse gases. Herbicides are the most heavily used agrochemicals and are frequently detected in aquatic ecosystems, with glyphosate and 2,4-Dichlorophenoxyacetic acid (2,4-D), representing the two most commonly used worldwide. In recent years, these herbicides are being used in mixtures to combat herbicide-tolerant noxious weeds. While it is well documented that herbicide use for agriculture is expected to increase, their indirect effects on wetland greenhouse gas dynamics are virtually unknown. To fill this knowledge gap, we conducted a factorial microcosm experiment using low, medium, and high concentrations of glyphosate or 2,4-D, individually and in combination to investigate their effects on wetland methane, carbon dioxide, and nitrous oxide fluxes. We predicted that mixed herbicide treatments would have a synergistic effect on greenhouse gases compared to individual herbicides. Our results showed that carbon dioxide flux rates and cumulative emissions significantly increased from both individual and mixed herbicide treatments, whereas methane and nitrous oxide dynamics were less affected. This study suggests that extensive use of glyphosate and 2,4-D may increase carbon dioxide emissions from wetlands, which could have implications for climate change.

Implications of climate change for strategic management theory

PurposeThe purpose is to stimulate scholarship in the strategic management field that accounts for conditions implied by projected impacts of climate change.Design/methodology/approachFollowing conceptual logic, the article analyses how changes in the strategic environment brought about by climate change may challenge current strategic management theory. It develops avenues for theory development based on expanding the field’s scope and extending its limits of applicability.FindingsThe article highlights the extent to which the strategy field has evolved in a stable empirical context, despite its attention to dynamism and hence is less well aligned with potentially pervasive new pressures and impacts. It sets out a rationale for moving beyond symbolic environmentalism, possibilities to harness cognitive and behavioural insights, dilemmas in strategic innovation and the empirical potential of non-mainstream contexts.Practical implicationsFirms and organisations can expect widespread systemic effects from climate change that challenge established ways of operating. The article explores how strategic management could better support strategists in navigating these shifts such that firms can continue to thrive.Originality/valueThe article approaches the issue of climate change specifically from the perspective of strategic management of firms rather than as policy or social advocacy. It focuses on pressures and characteristics that distinguish climate change from other environmental and social impacts on firms.

Birth Strikes, Climate Responsibility, and Hannah Arendt

Abstract Many people today are concerned about the implications of climate change for their personal reproductive decisions. Some have transformed such concerns into activism by engaging in a “birth strike” and publicly announcing their decision not to procreate because of climate change. This article draws on Hannah Arendt to examine the political meaning and significance of birth strikes. It makes three basic points. First, by highlighting the human condition of being born, what Arendt called natality, birth strikes have illuminated a distinctive set of threats and possibilities for climate politics. Second, due to modern consumerism and instrumentalism, which Arendt saw as the dominance of labor and work over action, birth strikes have been misperceived as advocating a reduction in personal carbon footprints and global population growth. Third, birth strikes have clarified some of the challenges for efforts to link the individual and collective dimensions of climate responsibility.

How dare we? The relation between language use, global identity, and climate activism

Identifying with and caring for people all over the world (i.e., a global identity) is positively related to pro-environmental behaviour. However, less is known how to foster such a global identity. Drawing on social identity theory, we investigated whether using inclusive (vs. exclusive) language in the context of demonstrations for climate protection increases people’s global identity. Moreover, we examined whether inclusive language use strengthens people’s intentions to engage in pro-environmental activism and their pro-environmental policy support, while reducing their denial of climate change implications, through a heightened global identity. In our pre-registered online experiment with a convenience sample mostly living in Germany (N = 307), we found no significant impacts of language use. Language effects did also not depend on people’s prior identification with the climate movement. However, our results show that, in line with our assumptions, the stronger people’s global identity, the more they intended to become pro-environmentally active, the more they supported pro-environmental policies, and the less they denied their impact on climate change.

Exploring Spatio-Temporal Precipitation Variations in Istanbul: Trends and Patterns from Five Stations across Two Continents

This study aims to reveal the long-term station-based characteristics of precipitation in Istanbul, a mega city located on the continents of Europe and Asia, with complex topography and coastline along the Marmara and Black Seas. Using data from five different stations, three located in the European continent and two in the Asian continent, with measurement periods ranging from 72 to 93 years, wet and dry days have been identified, statistics on precipitation conditions during the warm and cold seasons have been generated, categorization based on precipitation intensities has been performed, and analyses have been conducted using extreme precipitation indices. At stations located in the northern part of the city, higher annual total precipitation has been observed compared to those in the south. A similar situation applies to the number of wet days. While during the cold season, the wet and dry day counts are nearly the same across all stations, this condition exhibits significant differences in favor of dry days during the warm season. Apart from dry conditions, “moderate” precipitation is the most frequently observed type across all stations. However, “extreme” events occur significantly more often (6%) during the warm season compared to the cold season (2%). Long-term anomalies in terms of annual precipitation totals have shown similarity between stations in the north and south, which has also been observed in longitudinally close stations. Despite the longer duration of the cold season and stronger temperature gradients, extreme rainfall events are more frequent during the warm season, primarily due to thunderstorm activity. While trend analyses revealed limited significant trends in precipitation intensity categories and extreme indices, the study highlights the importance of comprehensive examination of extreme rainfall events on both station-based and regional levels, shedding light on potential implications for regional climate change. Lastly, during the cold season, the inter-station correlation in terms of annual total precipitation amounts has been considerably higher compared to the warm season.

Expanding oxygen minimum zones in the northern Indian Ocean predicted by hypoxia-related bacteria

Oxygen minimum zones (OMZs) in the ocean are areas with dissolved oxygen (DO) concentrations below critical thresholds that impact marine ecosystems and biogeochemical cycling. In the northern Indian Ocean (NIO), OMZs exhibit a tendency to expand in mesopelagic waters and contribute significantly to global nitrogen loss and climate change. However, the microbial drivers of OMZ expansion in the NIO remain understudied. Here, we characterized bacterial communities across DO gradients in the NIO using high-throughput 16S rRNA gene sequencing. We found that Marinimicrobia, Chloroflexi, and the SAR324 clade were enriched in both oxygen-deficient and low oxygen mesopelagic waters. Furthermore, Marinimicrobia, Chloroflexi, and the SAR324 clade exhibited a significant negative correlation with DO (P < 0.01), suggesting that they were well-adapted to the oxygen-deficient OMZ habitat. Functional predictions revealed heightened nitrogen metabolism in OMZs, particularly nitrate reduction, suggesting its pivotal role in nitrogen loss. These findings underscore the importance of microbial communities in driving OMZ expansion in the NIO and highlight their implications in global biogeochemical cycles and climate change.

Evaluating the dose-dependent effects of curcumin nano-micelles on rumen fermentation, nitrogen metabolism, and nutrient digestibility in heat-stressed fattening lambs: Implications for climate change and sustainable animal production.

Global warming threatens livestock production, especially in hot climates. This study evaluated the dose-dependent impacts of dietary curcumin nano-micelles (CNM) on rumen fermentation, nitrogen metabolism, and nutrient digestibility in heat-stressed fattening lambs. Thirty-two crossbred male lambs [ˆIle-de-France × (Dalagh × Romanov)] were utilized within the current study. The initial weight of lambs was documented as averaged by 31.2 ± 1.55 kg, while they were in their 4th to 5th months of age. Animals were fed increasing doses of dietary CNM (0, 20, 40, and 80 mg/day) over 97 days, under severe heat stress conditions with average temperature-humidity index (THI) of 24.5. Quadratic improvements (p < 0.01) occurred in weight gain, average daily gain (ADG), and feed conversion ratio (FCR) by 28.7%, 27.4%, and 23.9%, respectively, in the T40 group compared to the control. Additionally, T40 increased fiber digestion by 2.8% (p < 0.05). Furthermore, T40 quadratically improved parameters of rumen fermentation, including concentrations of NH3-N (p < 0.05), total volatile fatty acids (TVFA; p < 0.01), acetate (p < 0.05), and iso-valerate (p < 0.05), by 13.9%, 12.5%, 15.0%, and 43.5%, respectively, compared to the control. Quadratic increases were also observed in nitrogen balance (p < 0.05) and microbial protein synthesis (p < 0.01) by 19.8% and 37.6%, respectively, in the T40 group. Quadratic models estimated optimal CNM levels between 41.5 and 48.6 mg/day for multiple parameters. These findings indicate CNM at dose level of 40 mg/day could benefit heat-stressed lambs through enhanced rumen function and microbiota. Further research should refine ideal dosing for various species and production phases as higher levels adversely impacted fiber digestibility. Overall, CNM shows promise as a sustainable nutritional intervention for livestock production facing global warming.

Climate change and the Bay of Bengal region: vulnerabilities, risks and the absent cooperation

ABSTRACT There are three challenges specific to the Bay of Bengal region in the context of climate change. Firstly, this is a climate-sensitive region that sits on the brink of several climate and human-induced environmental changes and challenges. Secondly, it is still a relatively understudied geographic area from the perspective of climate risks. Third, the process of securitisation of climate change and long-term risks to resources in this region has not taken place fully as traditional security challenges, geopolitics, and great power competition have become primary concerns. This paper looks at the climate vulnerabilities and risks prevalent in this region. It also looks at human-induced challenges like marine pollution and IUU fishing. It then evaluates the reasons why several of the collective promises in the region remain unfulfilled. It is followed by a brief discussion on the security implications of climate change which is followed by a conclusion.

Unveiling the hidden impact: How biodegradable microplastics influence CO2 and CH4 emissions and Volatile Organic Compounds (VOCs) profiles in soil ecosystems

Biodegradable plastics promise eco-friendliness, yet their transformation into microplastics (bio-MPs) raises environmental alarms. However, how those bio-MPs affect the greenhouse gases (GHGs) and volatile organic compounds (VOCs) in soil ecosystems remains largely unexplored. Here, we investigated the effects of diverse bio-MPs (PBAT, PBS, and PLA) on GHGs and VOCs emission in typical paddy or upland soils. We monitored the carbon dioxide (CO2) and methane (CH4) fluxes in-situ using the self-developed portable optical gas sensor and analyzed VOC profiles using a proton-transfer reaction mass spectrometer (PTR-MS). Our study has revealed that, despite their biodegradable nature, bio-MPs do not always promote soil GHG emissions as previously thought. Specifically, PBAT and PLA significantly increased CO2 and CH4 emissions up to 1.9–7.5 and 115.9–178.5 fold, respectively, compared to the control group. While PBS exhibited the opposite trend, causing a decrease of up to 39.9% for CO2 and up to 39.9% for CH4. In addition, different types of bio-MPs triggered distinct soil VOC emission patterns. According to the Mann-Whitney U-test and Partial Least Squares Discriminant Analysis (PLS-DA), a recognizable VOC pattern associated with different bio-MPs was revealed. This study claims the necessity of considering polymer-specific responses when assessing the environmental impact of Bio-MPs, and providing insights into their implications for climate change.

Binge drinking associated with mean temperature: a cross-sectional study among Mexican adults living in cities

BackgroundThe association between environmental temperature and alcohol consumption has not been widely explored despite the potential that increasing temperatures could promote the consumption of alcoholic beverages and the alcohol-related burden of disease. We aimed to explore the association between temperature and binge drinking in Mexican adults from urban cities, overall, and by alcoholic beverage type.MethodsData on 10,552 adults ≥ 18 years was obtained from the 2016 National Survey on Drug, Alcohol, and Tobacco Consumption. The mean annual temperature at the municipality was obtained from the Mexican National Weather Service using monthly temperatures from 2015 to 2016. We analyzed binge drinking for all alcoholic beverages in the last year and by type of alcohol as beer, liquor, wine, and coolers. Associations between mean temperature over the past year and binge drinking over the past year among current drinkers were estimated using multilevel Poisson models with robust standard errors adjusted for age, sex, education level, marital status, and household socioeconomic status, with a fixed effect by region.ResultsWe observed a non-significant increase in the prevalence of binge drinking for every difference of 1 °C between municipalities of the same region. By alcohol type, a 1 °C increase in mean annual temperature across municipalities of the same region increased the prevalence of beer binge drinking in the past year by 0.9% (PR = 1.009, 95%CI 1.005, 1.013) among beer consumers and the prevalence of coolers’ binge drinking by 3.0% (PR = 1.030, 95%CI 1.003, 1.057) in coolers consumers. We observed non-significant results for liquor binge drinking (PR = 1.047, 95%CI 0.994, 1.102) and wine binge drinking (PR = 1.047, 95% 0.944, 1.161).ConclusionPeople living in municipalities with higher temperatures reported a higher beer binge drinking in Mexican cities. This could account for 196,000 cases of beer binge drinking in 2016. The context of each country needs to be considered when generalizing these findings, and they need to be further explored with longitudinal data as there might be implications for climate change. If our findings are confirmed given the forecasted rising temperatures, we could expect an increase in binge drinking and therefore, in the alcohol burden of disease.

Climate change and migration: A review and new framework for analysis

AbstractThis article presents a new interpretive framework for understanding the implications of climate change for migration, and reviews and reflects on existing evidence and research gaps in light of this framework. Most existing climate‐migration research is heavily environment‐centric, even when acknowledging the importance of contextual or intervening factors. In contrast, the framework proposed here considers five different pathways through which climate change is affecting, or might affect, migration: short‐term shocks, long‐term climatic and related changes, environmental “pull” factors, climate adaptation and mitigation measures, and perceptions and narratives. In reviewing the existing evidence relating to each of these pathways, the paper finds among other things that short‐term shocks may simultaneously increase and reduce migration; that the evidence on long‐term trends provides a weak basis for understanding future dynamics; and that more attention needs to be paid to the other three pathways, by researchers and policymakers alike. Overall, the proposed framework and associated evidence review suggest a different and broader understanding of the migration implications of climate change from that outlined in the IPCC's most recent assessment, or in many existing reviews.This article is categorized under: Climate and Development Knowledge and Action in Development

Impact of Energy Use on Air Pollution: Evidence from OCED Countries

Air pollution poses significant environmental and health risks, with numerous studies suggesting its dire consequences ranging from respiratory diseases to global climate change implications. In this context, understanding energy consumption patterns and their impact on air pollution is critical, especially in developed nations with high energy consumption rates. This paper empirically analyzes the impact of energy use on air pollution in OECD countries – a group of nations that play a pivotal role in global energy consumption and policy-making. Despite their economic advancements, the implications of their energy choices on air quality have not been extensively studied, presenting a gap in the literature. Spanning 12 years from 2010 to 2021, our research encompasses a total of 456 observations, employing panel data. We aim to unveil the relationship between energy use, both traditional and renewable and air pollution levels. The variables studied include Energy use per capita, Alternative and nuclear energy, Greenhouse gas emissions, Energy imports, Access to electricity, and the production of renewable energy (air, water, solar, geothermal). Leveraging various econometric models such as OLS, OLS Robust, fixed, and random effects models, our findings reveal that electricity use exacerbates air pollution levels. Particularly, the increase in carbon dioxide, coupled with the rising access to electricity, deteriorates air quality. In contrast, electricity sourced from renewables like water, wind, nuclear, and geothermal energy aids in mitigating air pollution, emphasizing the importance of sustainable energy choices for future policy considerations in OECD nations.

Corporate governance structure and climate‐related financial disclosure: Conventional banks versus Islamic banks

AbstractThis paper examines whether the different corporate governance structures of conventional banks (CBs) and Islamic banks (IBs) have varying effects on their respective climate‐related disclosure (CRD). Employing a unique dataset of CBs and IBs' CRD and corporate governance structures for the period of 2016–2019, we found that their respective corporate governance structures did indeed affect their CRD in different ways. Our findings suggest that CBs disclose more climate‐related information than IBs because IBs focus on Sharia compliance which does not emphasise the protection of the environment, while CBs may be more responsive to shareholders' and stakeholders' demands on climate and environment. These effects were stronger with the quality of governance, that is, CBs disclose more climate‐related information with the governance quality, while IBs disclose even less when their governance quality increases. The findings of this study have important implications for climate change, especially the Paris Accord and The 26th Meeting of the Conference of Parties (COP26). There are also policy implications for sustainable financial markets and the financial services sector.

Do abnormally high temperatures stimulate rural labour migration? Evidence from China

ABSTRACT Exploring the implications of climate change on rural labour employment is pivotal for formulating policies to combat the climate crisis. This research utilizes China’s unique and comprehensive individual-level rural data, coupled with nearly three decades of climate-related data to empirically examine the impact of abnormal temperatures on the duration of rural labour employment outside their home counties. The findings reveal that abnormal high-temperature shocks notably prolong the duration of rural labourers working outside their home county. This effect is particularly pronounced among the younger labour force, those lacking agricultural skill training, and individuals residing in provinces with limited grain-production capacity. Labour migration induced by abnormal heat may pose a challenge to agricultural security.

Aquatic connectivity: challenges and solutions in a changing climate.

The challenge of managing aquatic connectivity in a changing climate is exacerbated in the presence of additional anthropogenic stressors, social factors, and economic drivers. Here we discuss these issues in the context of structural and functional connectivity for aquatic biodiversity, specifically fish, in both the freshwater and marine realms. We posit that adaptive management strategies that consider shifting baselines and the socio-ecological implications of climate change will be required to achieve management objectives. The role of renewable energy expansion, particularly hydropower, is critically examined for its impact on connectivity. We advocate for strategic spatial planning that incorporates nature-positive solutions, ensuring climate mitigation efforts are harmonized with biodiversity conservation. We underscore the urgency of integrating robust scientific modelling with stakeholder values to define clear, adaptive management objectives. Finally, we call for innovative monitoring and predictive decision-making tools to navigate the uncertainties inherent in a changing climate, with the goal of ensuring the resilience and sustainability of aquatic ecosystems.

Accepting responsibility? Institutions and the security implications of climate change

Who has responsibility for addressing the security implications of climate change? States and the United Nations justify their existence on the promise of providing security. Yet, although the national and international security implications of climate change are increasingly acknowledged, incorporation of climate change in national security planning or institutional arrangements is far from universal, while debates in the UN Security Council about its role in addressing climate change have been characterized by contestation. This article examines key debates about the responsibilities these institutions have for providing security in the face of the threats posed by climate change, examining the extent to which these institutions accept responsibility for providing security in these contexts. Drawing on Toni Erskine’s notion of institutional moral agency, the article examines a 2017 inquiry into the national security implications of climate change in Australia, and the September 2021 UN Security Council debate on the international security implications of climate change. These two case studies explicitly focus on the question of institutional responsibility – of the Australian Government and the UN Security Council respectively – for addressing the threat of climate change. In both cases these institutions stop short of accepting responsibility for providing security in the face of climate change, with limited policy responses or institutionalization as the result. With the security implications of climate change increasingly apparent, and increasingly recognized by these (and other) actors, the failure to accept responsibility raises potentially significant questions about the legitimacy of these institutions themselves.

Overridingly increasing vegetation sensitivity to vapor pressure deficit over the recent two decades in China

Vapor pressure deficit (VPD) shows significant spatial and temporal variability in the context of global climate change, which is important for studying the implications of climate change on the structure and function of ecosystems to analyze the effects of VPD on vegetation dynamics. Spatial patterns of vegetation sensitivity to VPD have been recently investigated, however, the feedback of different vegetation types to VPD may vary depending on physiological characteristics, it is unclear how different types influence the sensitivity to VPD. In this study, the ERA5-Land reanalysis time-series dataset was used to analyze the spatial and temporal trends of VPD under different vegetation types. It was found that VPD showed an increasing trend in vegetated areas over the past 20 years with large spatial heterogeneity, generally increasing with drying conditions. On this basis, the spatial patterns of vegetation sensitivity to VPD and temporal trends in sensitivity were evaluated over the past 20 years in China using the enhanced vegetation index (EVI) and near-infrared reflectance of vegetation (NIRv) which can describe vegetation dynamics. The results show that the sensitivities under the two indices have high spatial consistency, with northeastern and central China showing positive sensitivities and southern China showing negative sensitivities, respectively. The positive sensitivities are relatively high for Deciduous Broadleaf Forests (DBF), Deciduous Needleleaf Forests (DNF), Grasslands (GL), and Croplands (CL) types, while the negative sensitivities are larger for Shrublands (SL) and Savannas (SA) types. Under different climatic zones, the sensitivity of CL and GL are independent of climatic zones (both showing positive), while the sensitivity of SL is negative in the Humid zone and positive in the Semi-Arid zone. Temporally, the sensitivity showed a slow increasing trend over the last 20 years. In terms of vegetation types, sensitivities of Evergreen Broadleaf Forests (EBF), DBF, GL and CL types showed a significant increasing trend (p < 0.05), except for the SL type, which showed a significant decreasing trend (p < 0.05). The trends of sensitivity are not affected by the differences in vegetation types (all of them show an increasing trend) under arid and semi-arid conditions, while dry sub-humid and humid have a greater impact on sensitivity trends. The finding of an overall increase in sensitivity suggests a mechanism of erratic change in vegetation growth under climate change. Notably, the increased sensitivity of certain vegetation types (especially GL and CL) suggests that these may become progressively vulnerable to increased VPD as global climate change persists, with the risk of moving from facilitation to inhibition of photosynthesis.

Classification of eco-zones from the factors and processes controlling phytoplankton biomass

Phytoplankton is of utmost importance to the marine ecosystem and, subsequently, to the Blue Economy. This study aims to explain the reasons for variability of phytoplankton by estimating the dependency of Chlorophyll-a (Chl-a) on various limiting factors using statistics. The global oceans are classified into coherent units that display similar sensitivity to changing parameters and processes using the k-means algorithm. The resulting six clusters are based on the limiting factors (PAR, iron, or nitrate) that modulate Chl-a yield divisions of the oceans, similar to regions of different trophic statuses. The clusters range from the polar and equatorial regions with high nutrient values limited by light, to open oceanic regions in downwelling gyres limited by nutrients. Some clusters also show a high dependency on marine dissolved iron. Further, oceans are also divided into eight clusters based on the processes (stratification, upwelling, topography, and solar insolation) that impact ocean productivity. The study shows that considering temporal variations is crucial for segregating oceans into ecological zones by utilizing correlation of time-series data into classification. Our results provide valuable insights into the regulation of phytoplankton abundance and its variability, which can help in understanding the implications of climate change and other anthropogenic effects on marine biology.