A5006279799- Environmental Toxicology and Ecotoxicology
- Marine Biology and Environmental Chemistry
- Pharmaceutical and Antibiotic Environmental Impacts
- Microplastics and Plastic Pollution
- Heavy metals in environment
- Recycling and Waste Management Techniques
- Fish Ecology and Management Studies
- Aquatic Invertebrate Ecology and Behavior
- Marine Toxins and Detection Methods
- Marine Ecology and Invasive Species
- Effects and risks of endocrine disrupting chemicals
- Environmental Education and Sustainability
- Fish Biology and Ecology Studies
- Toxic Organic Pollutants Impact
- Marine Biology and Ecology Research
- Marine and coastal ecosystems
- Environmental Chemistry and Analysis
- Environmental and Social Impact Assessments
- Nanocomposite Films for Food Packaging
- biodegradable polymer synthesis and properties
- French Urban and Social Studies
- Mercury impact and mitigation studies
- Data Quality and Management
- Insect Pest Control Strategies
- Reproductive biology and impacts on aquatic species
Cawthron Institute
2015-2025
University of Auckland
2022
Manaaki Whenua – Landcare Research
2016
Université de Bordeaux
2001-2007
Centre National de la Recherche Scientifique
2004-2007
The risk of plastic debris, and specifically micro(nano)plastic particles, to ecosystems remains be fully characterized. One particular issue that warrants further characterization is the hazards associated with chemical additives within as they are not chemically bound polymers can persistent biologically active. Most plastics contain therefore potential vectors for introduction these chemicals into environment leach from plastic, a process accelerated through degradation weathering...
A battery of biochemical parameters was used to evaluate the response mussels a contaminated coastal environment. multimarker approach developed, establishing scale for classification water quality in European sites (BIOMAR programme). This study allows evaluation temporal trends this when applied selected Mediterranean coast (BEEP Biological Effects Environmental Pollution Marine Coastal Ecosystems: Acetylcholinesterase activity (AChE) is highly sensitive organophosphorus and carbamate...
Abstract Investigations on the combined effects of ultraviolet (UV)‐B radiation and anthropogenic toxicants have focused primarily chemical interactions between UV‐B organic compounds. Only a few studies examined whether exposure to changes sensitivity toxicants. This question is addressed in laboratory study using common shoreline Antarctic amphipod Paramoera walkeri environmentally realistic levels copper, radiation, food shortage. Exposure copper for 21 d absence any additional stressors...
This study reports the development of a class eco-friendly antifouling biocides based on cyclic dipeptide scaffold, 2,5-diketopiperazine (2,5-DKP). The lead compound cyclo(N-Bip-l-Arg-N-Bip-l-Arg) (1) was synthesized in gram amounts and used to assess compatibility with an ablation/hydration coating, efficacy against biofouling, biodegradation. Leaching 1 from coating into seawater assessed via rotating drum method, revealing relatively stable predictable leaching rates under dynamic shear...
A range of natural products from marine invertebrates, bacteria and fungi have been assessed as leads for nature-inspired antifouling (AF) biocides, but little attention has paid to microalgal-derived compounds. This study the AF activity spirocyclic imine portimine (1), which is produced by benthic mat-forming dinoflagellate Vulcanodinium rugosum. Portimine displayed potent in a panel four macrofouling bioassays (EC50 0.06–62.5 ng ml−1), this was distinct that related compounds...
The aim was to apply a multimarker scoring approach as complementary freshwater monitoring programmes carried out by the Water Agency Adour–Garonne. Fish (chub, barbel and trout) were collected in 11 sites rivers south-west France. Five biomarkers of response measured either muscle or brain for acetylcholinesterase (AChE) liver glutathione S-transferase, catalase 7-ethoxyresorufine O-deethylase. As result multivariate analysis, clearly discriminated mainly O-deethylase activities. According...
The UV-filter benzophenone and the anti-inflammatory diclofenac are commonly detected in environment. aim of this study was to assess multigenerational effects chronic exposure low concentrations these chemicals on toxicity DNA methylation levels copepod Gladioferens pectinatus. Acute tests were conducted determine sensitivity G. pectinatus chemicals. All impacted breeding, hatching egg viability. Diclofenac (1 mg.L-1) reduced number eggs per gravid female. Benzophenone (0.5 decreased...
The dinoflagellate genus Ostreopsis produces palytoxin-like compounds (PLTXs) and the Gambierdiscus ciguatoxins (CTXs) maitotoxin (MTX). Human illness has been recorded following consumption of CTX-contaminated finfish. Their effects on flora fauna in environment are largely unexplored. Toxin profiles extracts isolates from Pacific region were characterised using liquid chromatography tandem mass spectrometry. Sea urchin (Evechinus chloriticus) fertilisation was unaffected by any algal...
Estuarine ecosystems are recipients of anthropogenic stressors released from land-based activities. The aim the present study was to investigate ecotoxicological hazards organic contaminants toward estuarine copepod Gladioferens pectinatus using acute and chronic testing. Most chemicals demonstrated toxicity influenced development copepods. Further research should be conducted these their mixtures long-term, multigenerational testing characterize mechanisms toxicity. Environ Toxicol Chem...
Marine plastic debris (MPD) are a global threat to marine ecosystems. Among countless ecosystem impacts, MPD can serve as vector for ‘hitchhikers’ by facilitating transport and subsequent spread of unwanted pests pathogens. The these non-indigenous species (NIS) have substantial impacts on native biodiversity, services/functions hence, important economic consequences. Over the past decade, increasing research interest has been directed towards characterization biological communities...
Pressures from anthropogenic activities are causing degradation of estuarine and coastal ecosystems around the world. Trace metals key pollutants that released can partition in a range environmental compartments, to be ultimately accumulated exposed biota. The level pressure varies with locations intensity activities. present study measured residues trace Mytilus mussel species collected world areas experiencing gradient pressures we classified as low, moderate, or high impact. data showed...
Toxic benthic cyanobacterial proliferations may pose a significant risk in freshwater ecosystems. In New Zealand, the only anatoxin-producing species reported to date is Microcoleus autumnalis. Management of M. autumnalis has primarily focussed on mitigating health risks associated with human and canine contact cyanobacteria. A major concern at ecological level potential for lethal sublethal effects macroinvertebrates that feed toxic mats or use them as refuge. present study, Deleatidium...
Arsenic, often found in gold deposits, can enter aquatic systems. The toxicity of arsenate (As(V)), the most common valence state arsenic freshwater, was assessed on larvae four freshwater insect taxa from naturally acidic (pH 5.9) and circumneutral 7.4) New Zealand streams. Insects stream were more sensitive to arsenate-spiked water than those stream. Early instars (<3 mm) mayfly Deleatidium spp. (Leptophlebiidae) compared later (3–6 (4-d LC50 1.5 3.5 mg/L, respectively) or stonefly...
Bivalve molluscs, as filter-feeding organisms, are known to accumulate metals that can produce deleterious effects on organisms. The phagocytic activity of haemocytes and lysosomal alterations in the digestive gland cells were measured freshwater Asian clam exposed cadmium, order assess possible use immunocompetence responses biomarkers quality. Clams laboratory nominal concentrations 3, 10, 21.4, 46.5 100 µg l−1 cadmium sampled after 7, 15 30 days exposure. results show a decrease only 7...
Hawke's Bay in New Zealand was impacted by Cyclone Gabrielle 2023, experiencing intense weather conditions and rainfall. Rivers streams surged beyond their banks, displacing large amounts of sediment. The sewage treatment plant industries the Waitangi catchment, south city Napier, were heavily impacted, making them potential sources contaminants. aim this study to investigate risk displaced sediments deposited Napier City, using bioassays chemical analysis methods. Sediment samples collected...
The Matāura River is the sixth largest river system in New Zealand and has long been subject to agricultural, industrial, residential land use activities. catchment geographic economic value of great cultural importance for local Māori, who have concerns over potential adverse impacts that anthropogenic stressors exert on health river. There a dearth information these towards native species such as longfin eel Anguilla dieffenbachii. This study assessed environmental status using biological...
Anthropogenic chemicals are fundamental to our standard of living in modern society. Unfortunately, some persistent and can enter waste streams ultimately the environment. Commonly used household products including pharmaceuticals personal care an important source contaminants. The aim this study was develop “Up-the-pipe Solutions” framework raise awareness about presence potential risks found reduce their levels or substitute them with less harmful alternatives. This approach based on...
Non-indigenous zooplankton species pose a biosecurity threat to New Zealand's freshwater native taxa. Nine are known have established in Zealand lakes date. The spread of some taxa is linked the translocation farmed fish, principally grass carp (Ctenopharyngodon idella), and recreational vessel movements. aims this study were assess effectiveness range chemical physical treatments for transport water associated equipment kill cladoceran, copepod, rotifer species, their risk non-target fish....