Britta Denise Hardesty

Britta Denise Hardesty
The Commonwealth Scientific and Industrial Research Organisation | CSIRO · Division of Marine and Atmospheric Research

PhD

About

161
Publications
94,072
Reads
How we measure 'reads'
A 'read' is counted each time someone views a publication summary (such as the title, abstract, and list of authors), clicks on a figure, or views or downloads the full-text. Learn more
7,947
Citations
Additional affiliations
May 2011 - present
CSIRO Marine And Atmospheric Research
Position
  • Senior Researcher
July 2006 - June 2012
The Commonwealth Scientific and Industrial Research Organisation
Position
  • Researcher
October 2005 - June 2006
University of Reading
Position
  • PostDoc Position

Publications

Publications (161)
Article
Plastic litter is a pollutant of aquatic environments worldwide, with some of the world's highest litter densities occurring in freshwater ecosystems. Little information about the risk that plastic litter poses to aquatic wildlife is available across the world's most polluted waterways. To help assess the risk to aquatic species where empirical dat...
Article
Full-text available
Interdisciplinary research is paramount to addressing ocean sustainability challenges in the 21st century. However, women leaders have been underrepresented in interdisciplinary marine research, and there is little guidance on how to achieve the conditions that will lead to an increased proportion of women scientists in positions of leadership. Her...
Article
Regardless of where plastic pollution originates, the management interventions made at the local level are crucial to the global success of reducing plastic pollution. Reduced plastic consumption and pollution have been observed in communities with plastic taxes and educational programs. However, there is currently a lack of a quantitative framewor...
Article
Full-text available
Plastic pollution is a critical environmental concern. There is a growing focus on this transboundary issue, and a corresponding increase in public and government awareness. Understanding the key factors associated with litter and mismanaged waste on land will help to predict where and how waste enters the environment, providing opportunities for l...
Article
Full-text available
In the age of the Anthropocene, the ocean has typically been viewed as a sink for pollution. Pollution is varied, ranging from human-made plastics and pharmaceutical compounds, to human-altered abiotic factors, such as sediment and nutrient runoff. As global population, wealth and resource consumption continue to grow, so too does the amount of pot...
Article
Full-text available
Quantifying accurately human impacts on marine ecosystems is key to healthy oceans. While fish production from wild stocks has plateaued since the 1980 s, those estimates are primarily drawn from large-scale commercial fisheries, whose boats are routinely monitored using a suite of sophisticated equipment to ensure compliance. Smaller vessels, howe...
Article
The remote Gulf of Carpentaria (GoC) represents 10% of Australia's coastline. This large, shallow sea supports high-value fishing activities and habitat for threatened species, and is a sink for abandoned, lost and discarded fishing gear (ALDFG) ‘ghost nets’, most originating from fishing activities outside of Australia's Exclusive Economic Zone. W...
Article
Anthropogenic debris (AD) including plastics, foams and fishing debris, are an undesirable accompaniment to beaches worldwide, arriving through direct deposition (littering) and oceanic transport. We investigated the standing stocks of 12 types of AD on inhabited islands, uninhabited islands and mainland locations, and the potential factors relatin...
Article
Full-text available
Monitoring the use of anchored fish aggregating devices (AFADs) is essential for effective fisheries management. However, detecting the use of these devices is a significant challenge for fisheries management in Indonesia. These devices are continually deployed at large scales, due to large numbers of users and high failure rates, increasing the di...
Article
Pollution of coastal environments by anthropogenic debris is a global problem that is increasingly in the public eye. We evaluated the influence of socioeconomic and geographic factors on common debris items at a global scale. We compared debris density and socioeconomic drivers of the ten most common items reported on land and the seafloor, analyz...
Article
Full-text available
The use of plastic products has become an indispensable part of our lives. However, due to improper discharge into the ocean and their prevalence in food storage use, humans ingest microplastics (MP) from consuming seafood or drinking water, which poses safety hazards. Furthermore, the existing MP separation methods, such as density separation and...
Article
Full-text available
Protein from fish is essential for feeding the world’s population and is increasingly recognized as critical for food security. To ensure that fisheries resources can be sustainably maintained, fisheries management must be appropriately implemented. When logbook and landing records data are not complete or are incorrect, it is challenging to have a...
Article
Full-text available
Riverbanks are an important source of plastic pollution. However, the current assessment methods for riverbank litter are based on a point-based sampling which is time consuming and limited in scope. To quickly assess hotspot areas and litter compositions in larger areas, this study developed a new citizen science bicycle survey for riverine debris...
Article
Full-text available
Abandoned, lost or otherwise discarded fishing gear (ALDFG) represents a major sea-based source of marine debris globally, with far-reaching socioeconomic and environmental impacts. Estimates of the amount of ALDFG entering the ocean have implications for managers and policy makers as they work to tailor solutions at scale. While scientists have wo...
Article
Full-text available
Abandoned, Lost or otherwise discarded fishing gear (ALDFG) comprises a significant part of global marine plastic pollution, with adverse consequences for fishers, the seafood industry, and marine wildlife and habitats. To effectively prevent and reduce ALDFG at source, an understanding of the major causes of and drivers behind fishing gear losses...
Article
Environmental harm from plastic pollution partly results from compliance failure at the individual level. Three prevalent non-compliant motivations for polluting plastics include economic gains, ignorance of the rules and unlikely penalization from inadequately enforced rules. Given compliance is primarily the responsibility of local waste manageme...
Preprint
Full-text available
Abstract There have been a variety of attempts to model and quantify the amount of land-based waste entering the world’s oceans, most of which rely heavily on global estimates of population density as the key driving factor. Using empirical data collected in seven different countries/territories (China, Kenya, South Africa, South Korea, Sri Lanka,...
Article
Full-text available
Globally, seabird populations have been in decline due to multiple threats throughout their range. Separating simultaneous pressures is challenging and can require significant amounts of data over long periods of time. We use spatial contrasts to investigate the relative importance of several drivers for the purported decline in a species listed as...
Article
Full-text available
Our societies will change following the COVID-19 crisis, as well as ocean management. Here we present 10 action points in a marine context, to re-energize our economies and avert the biodiversity and climate change crises of which the present COVID-19 crisis represents a portend: (1) promote carbon neutral economies to mitigate global warming; (2)...
Article
Full-text available
Plastic pollution, and its associated impacts on marine fauna due to chemical contamination, is an area of growing global concern. We analyzed 145 preen gland oil samples from 32 seabird species belonging to 8 families with different foraging habits and life history strategies from around the world for plastic additives and legacy persistent organi...
Article
Illegal fishing is a widespread, global phenomenon that is affecting already heavily depleted wild fish stocks, threatening marine habitats and contributing to marine pollution through discarded fishing gear. Many different measures have been implemented by nation states to deter and prevent illegal fishing. These include coastal surveillance and p...
Article
Full-text available
Albatrosses are among the world's most imperiled vertebrates, with 73% of species threatened with extinction. Ingestion of plastic is a well‐recognized threat among three North Pacific species, but lesser known in the southern hemisphere, where it is considered a minor threat. As plastic entering the ocean is increasing while albatross populations...
Article
Full-text available
In their recent paper, Lavers et al. 2019 measured blood chemistry parameters in fledgling seabirds, finding a link between ingested plastic and growth, calcium, uric acid, and cholesterol. The manuscript suggests varied toxicological interpretations and concluded that superficially healthy animals may still experience negative health consequences...
Article
Full-text available
Pollution by plastic and other debris is a problem affecting the world's oceans and is increasing through time. The problem is so large that prioritizing solutions to effect meaningful change may seem overwhelming to the public and policy makers. Marine megafauna are known to mistakenly eat anthropogenic debris and die from consequent gastrointesti...
Article
Full-text available
Marine debris is a growing threat to hundreds of marine animal species. To understand the consequences of marine debris to wildlife populations, studies must go beyond reporting the incidence of wildlife and debris interactions and aim to quantify the harm resulting from these interactions. Tubenosed seabirds are globally threatened, with near univ...
Article
Full-text available
Naturally occurring metals and metalloids [metal(loid)s] are essential for the physiological functioning of wildlife; however, environmental contamination by metal(loid) and plastic pollutants is a health hazard. Metal(loid)s may interact with plastic in the environment and there is mixed evidence about whether plastic ingested by wildlife affects...
Article
Full-text available
Illegal, unregulated, and unreported (IUU) fishing is a major contributor to global overfishing, threatening food security, maritime livelihoods, and fisheries sustainability. An emerging narrative in the literature posits that IUU fishing is associated with additional organized criminal activities, such as drug trafficking, human trafficking, slav...
Article
Full-text available
Interest in understanding the extent of plastic and specifically microplastic pollution has increased on a global scale. However, we still know relatively little about how much plastic pollution has found its way into the deeper areas of the world’s oceans. The extent of microplastic pollution in deep-sea sediments remains poorly quantified, but th...
Article
Full-text available
The swallow-tailed gull, Creagrus furcatus, is a seabird endemic to the Galápagos archipelago. In general health, blood chemistry and haematology, parameters have not been published for this species. Blood analyses were run on samples drawn from 58 clinically healthy swallow-tailed gulls captured at Islote Pitt on San Cristóbal Island in July 2016...
Article
Full-text available
Marine debris represents a major threat for the environment. Plastic production is increasing exponentially and causing an unprecedented growth of plastic pollution entering the marine environment. Hence, a thorough assessment of debris accumulation areas is required to address the longstanding question about where is all the missing plastic. Most...
Preprint
Full-text available
A group of ocean experts brainstormed about the most pressing actions to be taken in favour of ocean conservation in the context of SARS-CoV2
Article
Full-text available
Pollution of coastal and marine environments by mismanaged anthropogenic debris is a global threat requiring complex, multilateral solutions and mitigation strategies. International efforts to catalogue and quantify the density, extent and nature of mismanaged waste have not yet assessed the heterogeneity of debris between nearby areas. Better unde...
Article
Full-text available
Marine plastic debris floating on the ocean surface is a major environmental problem. However, its distribution in the ocean is poorly mapped, and most of the plastic waste estimated to have entered the ocean from land is unaccounted for. Better understanding of how plastic debris is transported from coastal and marine sources is crucial to quantif...
Article
The Galápagos shearwater, Puffinus subalaris, is a seabird endemic to the Galápagos archipelago. Hematology, blood chemistry, and general health parameters have not been published for this species. Analyses were run on blood samples drawn from 20 clinically healthy Galápagos shearwaters captured by hand at their nests at Islote Pitt on San Cristóba...
Article
Since the start of commercial plastics production in the 1940s, global production has rapidly accelerated, doubling approximately every 11 years. Despite this increase and clear evidence of plastics loss into the oceans, including a substantial standing stock, previous research has not detected a temporal trend in plastic particle concentration in...
Article
Full-text available
The Galápagos Archipelago and Galápagos Marine Reserve lie 1000 km off the coast of Ecuador and are among the world's most iconic wildlife refuges. However, plastic litter is now found even in this remote island archipelago. Prior to this study, the sources of this plastic litter on Galápagos coastlines were unidentified. Local sources are widely e...
Article
Full-text available
Bottled water is one sector of the beverage industry that has recently experienced substantial growth. The littering of plastic water bottles and the carbon emissions produced from bottled water production results in harmful effects on the environment. To reduce the harm of bottled water production and litter, government and non-government organisa...
Article
Full-text available
Abandoned, lost or otherwise discarded fishing gear (ALDFG) represents a significant, yet ultimately unknown amount of global marine debris, with serious environmental and socioeconomic impacts. This study reviews 68 publications from 1975 to 2017 that contain quantitative information about fishing gear losses. Gear loss estimates reported by the s...
Article
Full-text available
Plastics and other artificial materials pose new risks to health of the ocean. Anthropogenic debris travels across large distances and is ubiquitous in the water and on the shorelines, yet, observations of its sources, composition, pathways and distributions in the ocean are very sparse and inaccurate. Total amounts of plastics and other man-made...
Article
Full-text available
Maximenko et al. Integrated Marine Debris Observing System Plastics and other artificial materials pose new risks to the health of the ocean. Anthropogenic debris travels across large distances and is ubiquitous in the water and on shorelines, yet, observations of its sources, composition, pathways, and distributions in the ocean are very sparse an...
Article
Full-text available
The Galápagos Archipelago and Marine Reserve lies 1000 km off the coast of Ecuador and is among the world's most iconic wildlife refuges. However, plastic litter is now found even in this remote and iconic island archipelago. Prior to this study, the sources of this plastic litter on Galápagos coastlines were unidentified. Local sources are widely...
Technical Report
Full-text available
A suite of field manuals was released by the NESP Marine Hub in early 2018 to facilitate a national monitoring framework, with a focus on seven marine sampling platforms: multibeam sonar, autonomous underwater vehicles, baited remote underwater video (pelagic and demersal), towed imagery, sleds and trawls, and grabs and box corers. These platforms...
Article
Plastic marine pollution is an increasing threat to global marine diversity. Quantifying this threat is particularly difficult and complex, especially when evaluating multiple species with different ecological requirements. Here, we examine the semi-enclosed basin of the Mediterranean Sea where the inputs of plastic pollution and its impact on mari...
Article
Full-text available
Procellariiformes are the most threatened bird group globally, and the group with the highest frequency of marine debris ingestion. Marine debris ingestion is a globally recognized threat to marine biodiversity, yet the relationship between how much debris a bird ingests and mortality remains poorly understood. Using cause of death data from 1733 s...
Article
Adverse impacts of marine litter is documented on >1400 species, including marine megafauna (fish, birds, sea turtles and mammals). The primary impacts include ingestion and entanglement, and there is increasing concern about chemical contamination via ingestion. Numerous survey approaches and monitoring programs have been developed and implemented...
Technical Report
Full-text available
This report was the product of a GESAMP Working Group, consisting of 15 independent experts based in North America, South America, Asia, Africa, Europe and Australasia. The report was edited by Kershaw, Turra and Galgani. It with provides recommendations to encourage a more harmonised approach to the monitoring and assessment of plastic litter, inc...
Article
Full-text available
Procellariiform seabirds are both the most threatened bird group globally, and the group with the highest incidence of marine debris ingestion. We examined the incidence and ecological factors associated with marine debris ingestion in Procellariiformes by examining seabirds collected at a global seabird hotspot, the Australasian - Southern Ocean b...
Article
For decades, community groups and scientists have sampled coastal waste along shorelines to understand the distribution of debris. However, when debris is washed ashore or locally deposited, it may be washed away before it is removed or recorded. Using statistical models to understand the movement of debris in coastal processes may identify potenti...
Article
Full-text available
Plastic in the marine environment is a growing environmental issue. Sea turtles are at significant risk of ingesting plastic debris at all stages of their lifecycle with potentially lethal consequences. We tested the relationship between the amount of plastic a turtle has ingested and the likelihood of death, treating animals that died of known cau...
Article
Full-text available
Fishing activities are important for food resources and economics globally, with more than 120 million people depending on fishing for their livelihood. Fisheries management, and the related crackdown on illegal fishing has been rapidly evolving in the last several years, particularly in Indonesian waters. This is critically important because of th...
Article
Full-text available
Automatic Identification Systems (AIS) are a standard feature of ocean-going vessels, designed to allow vessels to notify each other of their position and route, to reduce collisions. Increasingly, the system is being used to monitor vessels remotely, particularly with the advent of satellite receivers. One fundamental problem with AIS transmission...