Chemosphere, Год журнала: 2022, Номер 294, С. 133769 - 133769
Опубликована: Янв. 28, 2022
Язык: Английский
Water Research, Год журнала: 2023, Номер 250, С. 121033 - 121033
Опубликована: Дек. 20, 2023
Язык: Английский
Процитировано
19
The Science of The Total Environment, Год журнала: 2024, Номер 915, С. 169634 - 169634
Опубликована: Янв. 24, 2024
Multistressor studies were performed in five regions of the United States to assess role pesticides as stressors affecting invertebrate communities wadable streams. Pesticides and other chemical physical measured 75 99 streams per region for 4 weeks, after which surveyed (435 total sites). sampled weekly filtered water, once bed sediment. The a stressor was assessed by evaluating multiple lines evidence: toxicity predictions based on pesticide concentrations, multivariate models statistical analyses, previously published mesocosm experiments. Toxicity using benchmarks species sensitivity distributions correlations suggested that present at high enough concentrations adversely affect regional scale. Two undirected techniques—boosted regression tree distance-based linear models—identified predictors (respectively) metrics community composition. To put insecticides context with known, influential covariates response, generalized additive used identify individual pesticide(s) important condition each region, accounting natural covariates. Four identified scale: bifenthrin, chlordane, fipronil its degradates, imidacloprid. Fipronil particularly Southeast imidacloprid, chlordane regions. For fipronil, supported experiments demonstrated adverse effects naïve aquatic when dosed under controlled conditions. These evidence do not prove causality—which is challenging field multistressor conditions—but they make strong case within
Язык: Английский
Процитировано
8
Ecological Indicators, Год журнала: 2024, Номер 160, С. 111767 - 111767
Опубликована: Фев. 28, 2024
Water yield (WY) ecosystem service is an important ecological indicator in assessing water availability and sustainability. Although it was widely acknowledged that WY mainly driven by land use change climate factor, the intrinsic driving mechanisms remained unclear. Here, we selected Chengdu-Chongqing District Southwest China as study area, using InVEST model, structural equation modeling, scenario analysis to exhaustively reveal past future changes contribution rate of factors. The results demonstrated area experienced rapid forest expansion urbanization at expense cropland grassland last 30 years. In this region, increased approximately ∼130 mm during 1990–2020, attributed precipitation (>90 %), secondary potential evapotranspiration change. It projected end 21st century, would increase about 20 % under SSP585 compared historical average. We found every 100 produce additional 62–65 WY, with higher resulting larger coefficient due energy constraint there. Further, also elevation factor played a direct negative role (standardized path coefficient, b = −0.4, p < 0.05) precipitation, further indirectly, positively dominated (b 1.0, WY. This implied occurred areas lower elevation. These highlighted topographic climatic factors controlling such basin-featured which provided deeper understanding into science.
Язык: Английский
Процитировано
7
Current Opinion in Environmental Science & Health, Год журнала: 2019, Номер 11, С. 1 - 7
Опубликована: Июнь 12, 2019
Язык: Английский
Процитировано
50
Environmental Science & Technology, Год журнала: 2020, Номер 54(22), С. 14361 - 14371
Опубликована: Ноя. 2, 2020
Rivers discharging to the Great Barrier Reef carry complex pesticide mixtures. Here we present a first comprehensive ecotoxicological risk assessment using species sensitivity distributions (SSDs), explore how changes with time and land use, identify drivers of mixture risks. The analyzed data set comprises 50 different pesticides metabolites that were in 3741 samples from 18 river creek catchments between 2011 2016. Pesticide mixtures 82% samples, maximum 23 median five compounds per sample. Chemical-analytical techniques insufficiently sensitive for at least seven (metsulfuron-methyl, terbutryn, imidacloprid, clothianidin, ametryn, prometryn, thiamethoxam). classical concepts concentration addition independent action applied SSDs, focusing on environmental threshold values protective 95% species. Both produced almost identical estimates. Mixture was therefore finally assessed addition, as sum individual quotients. quotients ranges 0.05 122 0.66. An (i.e., exceeding 1) indicated 38.5% samples. Sixteen accounted 99% risk, diuron, atrazine, metolachlor, hexazinone being most important drivers. Analysis land-use patterns catchment areas showed an association sugar cane farming elevated levels, driven by presence diuron.
Язык: Английский
Процитировано
48
The Science of The Total Environment, Год журнала: 2021, Номер 774, С. 145687 - 145687
Опубликована: Фев. 9, 2021
If not managed properly, modern agricultural practices can alter surface and groundwater quality drinking water resources resulting in potential negative effects on aquatic terrestrial ecosystems. Exposure to agriculturally derived contaminant mixtures has the habitat negatively affect fish other organisms. Implementation of conservation focused improving continues increase particularly landscapes throughout United States. The goal this study was determine consequences land management actions primary drivers five watersheds Chesapeake Bay, largest watershed Atlantic Seaboard North America where health issues have been documented for two decades. Surface collected analyzed 301 organic contaminants benefits implemented best (BMPs) designed reduce nutrients sediment streams also reducing waters. Of measured, herbicides (atrazine, metolachlor), phytoestrogens (formononetin, genistein, equol), cholesterol total estrogenicity (indicator estrogenic response) were detected frequently enough statistically compare seasonal flow effects, landscape variables BMP intensity. Contaminant concentrations often positively correlated with stream flow, although magnitude effect varied by across seasons sites. Land-use less utilized including biosolids, manure pesticide application percent phytoestrogen producing crops inversely related site-average concentrations. Increased intensity indicating co-benefits BMPs reduction studied watersheds. information gained from will help prioritize ecologically relevant monitoring contributes understanding better manage living inside outside Bay watershed.
Язык: Английский
Процитировано
38
Environmental Toxicology and Chemistry, Год журнала: 2021, Номер 40(8), С. 2282 - 2296
Опубликована: Май 12, 2021
Abstract Contaminants alter the quantity and quality of insect prey available to terrestrial insectivores. In agricultural regions, aquatic insects emerging from freshwaters can be impacted by insecticides originating surrounding croplands. We hypothesized that, in such adult could also act as vectors pesticide transfer food webs. To estimate insect‐mediated flux wetlands embedded an important landscape, semipermanetly temporarily ponded were surveyed cropland grassland landscapes across a natural salinity gradient Prairie Pothole Region North Dakota (USA) during bird breeding season 2015 2016 ( n = 14 15 wetlands, respectively). Current‐use pesticides, including herbicide atrazine bifenthrin imidacloprid, detected newly emerged insects. Pesticide detections similar wetlands. Biomass decreased 43%, increased 50% along observed concentrations (from 3 577 ng total insecticide g –1 insect). Overall, estimated between 2 180 µg wetland d ecosystem. one study years, biomass was 73% lower than dependent on salinity. Our results suggest that accumulated reduce availability for insectivores potentially increase insectivore exposure insect‐borne pesticides. Adult retain pesticides metamorphosis may expose living near both dietary sources toxic chemicals. Environ Toxicol Chem 2021;40:2282–2296. Published 2021. This article is U.S. Government work public domain USA.
Язык: Английский
Процитировано
35
Ecological Indicators, Год журнала: 2021, Номер 126, С. 107684 - 107684
Опубликована: Апрель 19, 2021
Understanding how anthropogenic pressures affect river ecological status is pivotal to designing effective management strategies. Knowledge on aquatic habitats in Europe has increased tremendously since the introduction of European Union Water Framework Directive, yet heterogeneities mandatory monitoring and reporting still limit identification patterns at continental scale. Concurrently, several model data-based indicators freshwater that cover continent consistently have been developed. The objective this work was create maps probability occurrence conditions, namely failure achieve good status, or be affected by specific pervasive impacts. To end, we applied logistic regression methods conditions as functions continental-scale water pressure indicators. prediction capacity models varied with condition: fail achieving nutrient organic pollution were rather well predicted; conversely, chemical (other than organic) alteration due hydrological morphological changes poorly predicted. most important explaining shares agricultural artificial land, mean annual net abstractions, share loads from point sources, upstream length uninterrupted barriers. failing estimated high (>60%) for 36% considered network about 1.6 M km. Occurrence impact 26% 20%. are built upon information reported country level pursuant EU legal obligations, generated scale data: both sources epistemic uncertainty. In particular, depend data collection scoping schemes, national knowledge interpretation system pressures. turn, heterogeneous biases incomplete incorrect inputs uncertainty adopted. Lack reach- site-scale may hamper detection locally relevant impacts, example changes. provide a snapshot current offer an alternative source habitats, which help filling gaps. Foremost, analysis demonstrates need developing more hydromorphological alterations pollution.
Язык: Английский
Процитировано
34
Sustainable Water Resources Management, Год журнала: 2023, Номер 9(6)
Опубликована: Ноя. 22, 2023
Abstract Human activities threaten the integrity of watersheds. We aimed to investigate impact land use on water quality, adopting a multiscale approach. collected samples from twelve streams in Southern Brazil and conducted limnological analyses (physical, chemical, biological) during dry season. used quality index based standards Canada Brazil. Land percentage was measured two groups (local scale network scale). Environmental variables were summarized through Principal Component Analysis, we organized them into Linear Models, integrating classes terrain slope Multifit formula. Statistical performed using R software. Results indicated contamination by lead, chromium, copper, nitrogen, Escherichia coli samples. The Canadian Water Quality Guidelines for Protection Aquatic Life resulted an ranging 23.3 47.3, compared Brazilian Resolution No. 357/2005 Class 2, which had 47.5 100. This disparity is attributed more rigorous sensitive monitoring approach adopted guidelines. Riparian forests are up 50 m wide associated with improved quality. Agricultural urban main contributors degradation area extending 1000 watershed. emphasize importance watershed management public policies, considering not only riparian forest preservation, but also human throughout It crucial prioritize science-based environmental policies strengthen enforcement prevent increasingly pronounced collapses. have identified urgency reformulate CONAMA conservationist ecosystem-oriented approach, as well propose modifications Forest Code, particularly regarding buffer zones permanent preservation areas. Thus, this study can provide insights, such incorporating “effect scale,” enhance resource landscapes heavily influenced action, contributing advancement future research freshwater ecosystems.
Язык: Английский
Процитировано
16
Water, Год журнала: 2023, Номер 15(4), С. 734 - 734
Опубликована: Фев. 13, 2023
Contemporary biological assemblage composition and biodiversity are often shaped by a range of natural environmental factors, human disturbances, their interactions. It is critical to disentangle the effects individual variables stressors in data analysis support management decision-making. Many statistical approaches have been proposed used estimate predictors, which correlated interacted with one another. In this article, we review nine those terms strengths, limitations, related r packages. Among hierarchical partitioning, propensity score, sum AIC weights, structural equation modeling, tree-based machine learning algorithms. As no approach perfect, offer two suggestions: (1) reducing number predictors as low possible carefully screening all candidate based on considerations; (2) selecting or more characteristics given dataset specific research goals study, using them parallel sequence. Our could help ecologists navigate through challenging process.
Язык: Английский
Процитировано
14