ENVIRONMENTAL POLLUTION
·
2017
·
IF 5.099
Dong Zhu,Qing-Fang Bi,Qian Xiang,Qing-Lin Chen,Peter Christie,Xin Ke,Long-Hua Wu,Yong-Guan Zhu
Although the roles of earthworms and soil collembolans in the transport of microplastics have been studied previously, the effects of the soil biota at different trophic levels and interspecific relationships remain poorly understood. Here, we examine three soil microarthropod species to explore their effects on the transport of microplastics. The selected Folsomia candida and Hypoaspis aculeifer are extensively used model organisms, and Damaeus exspinosus is a common and abundant indigenous species in China. A model food chain (prey-collembolan and predator-mite) was structured to test the role of the predator-prey relationship in the transport of microplastics. Commercial Polyvinyl chloride (PVC) particles (Diameter: 80–250 μm) were selected as the test microplastics, because large amounts of PVC have persisted and accumulated in the environment. Synchronized soil microarthropods were held in plates for seven days to determine the movement of microplastics. The 5000 microplastic particles were carefully placed in the center of each plate prior to the introduction of the animals. Our results clearly show that all three microarthropod species moved and dispersed the microplastics in the plates. The 0.54%, 1.8% and 4.6% of the added microplastic particles were moved by collembolan, predatory mite and oribatid mite, respectively. Soil microarthropods (<0.2 cm) transported microplastic particles up to 9 cm. The avoidance behavior was observed in the collembolans in respect of the microplastics. The predatory -prey relationship did promote the transport of microplastics in the plates, increasing transport by 40% compared with the effects of adding single species (P < .05). Soil microarthropods commonly occur in surface soils (0–5 cm) and, due to their small body size, they can enter soil pores. Our results therefore suggest that the movement of microplastics by soil microarthropods may influence the exposure of other soil biota to microplastics and change the physical properties of soils.
研究领域:
生态学
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环境科学
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PubMed
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2025
·
IF 11.3
Yu Cheng,Quanbo Yu,Weihua Zhang,Zhiqiang Liu,Jue Ding,Hongzhe Pan,Yiping Li,Dan Wu,Minghua Zhu,Xianchuan Xie,Ningyuan Zhu
Multispecies biofilm exhibited high resistance to nanotoxicity by secreting extracellular polymeric substances (EPS) and undergoing alterations in the community composition. Scarce information was available to assess how these changes could further influence the transfer of nanoparticles (NPs) through the biofilm-based food chain. Photic biofilm was exposed to two distinct NPs (ZnO and TiO 2 ) and subsequently grazed by snails. Exposure to different NPs led to variations in biomass, chlorophyll content, EPS productivity, alpha diversity, and community composition of the photic biofilm. The presence of ZnO NPs facilitated the growth of phylum Cyanobacteria while TiO 2 promoted EPS productivity of photic biofilm. EPS were capable of embedding NPs (TiO 2 and ZnO) within its matrix, thereby mitigating their aggregation within the biofilm matrix. These alterations were subsequently confirmed to have an impact on the trophic transfer factors (TTF) of NPs through the constructed biofilm-snail food chain. The TTF of ZnO was lower than that of TiO 2 in feeding scenario 1 (only fed on TiO 2 or ZnO biofilm) but higher than that of TiO 2 in feeding scenario 2 (fed on TiO 2 and ZnO biofilm simultaneously), which was attributed to the shifts in the algae composition and a smaller size of ZnO NPs in EPS. This study demonstrated that the response of photic biofilm to NPs further affected the TTFs of NPs through the food chain.
研究领域:
生态学
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环境科学
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PubMed
高影响因子
JOURNAL OF INSECT SCIENCE
·
2021
·Vol. 21
·期 3
·
IF 1.857
Song Yunzhe,Liu Changming,Cai Pumo,Chen Weibin,Guo Yaqing,Lin Jia,Zhang Shufang
Aphidius gifuensis Ashmaed is a generalist endoparasitoid that parasitizes a variety of aphid species. In China, it is widely used as a biological control agent to protect vegetables and tobaccos in open fields; control efficiency is largely dependent on its host-seeking ability. In this study, a six-choice olfactometer was used to investigate the olfactory responses of A. gifuensis to tobacco plants that had suffered damage (either varying degrees of mechanical damage or from aphid-feeding at different time intervals) and tobacco volatiles with different dosages. Furthermore, the regularity of A. gifuensis females’ response toward an aphid/tobacco complex was monitored using a Y-tube olfactometer. Our findings suggest that tobacco plants are significantly attractive to A. gifuensis after they have been punctured with 50 holes, or housed with Myzus persicae (Sulzer) at a density of 400 aphids, except at an infestation time of 12 h. Moreover, aphid density had a more significant effect on the response than the time interval since aphid application. Aphidius gifuensis was found to be active during the daytime and preferred to search for their aphid hosts at 14:00 h. Five EAG-active tobacco volatiles (trans-2-hexenal, methyl salicylate, benzaldehyde, cis-3-hexen-1-ol, and 1-hexanal) were found to significantly attract A. gifuensis females at different concentration ranges. The practical implications of these results are discussed in the framework of the sustainable biological control of pest aphids in agricultural production systems.
研究领域:
昆虫学
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化学生态学
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生物防治
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PubMed
高影响因子
BIOLOGICAL CONTROL
·
2022
·
IF 3.857
Jinhao Zhao,Minmin Liang,Zhongyan Wang,Yanyan Zhao,Jingli Cheng,Yongjun Du
Trichogramma dendrolimi Matsumura (Hymenoptera: Trichogrammatidae) is one of the most important parasitic natural enemies of Grapholita molesta (Busck) (Lepidoptera: Tortricidae) in peach and pear orchards. The artificial rearing T. dendrolimi have been widely used in biological control programs in recent years. However, its actual parasitic effect on the pest in the field is less, so it is important to develop attractants to increase the parasitic efficiency of the parasitoids. T . dendrolimi can be easily attracted by semiochemicals derived from flowers, intact plants, herbivore-attacked plants, and insects in its orchard habitats. In this paper, 73 semiochemicals were evaluated as potential attractants at three concentrations (0.1 mg/mL, 1 mg/mL, and 10 mg/mL) to T . dendrolimi by Y-tube olfactometer bioassays and Electroantennogram (EAG) technology, and then the mixtures of active individual compounds were further tested and evaluated in the field. As a result, 17 individual compounds showed attractive bioactivity to T . dendrolimi . Interestingly, when methyl salicylate and benzaldehyde mixed with linalool oxide or cis -3-hexenyl caproate in a volume ratio of 10:3:3 respectively showed excellent attractant bioactivity for T . dendrolimi in the orchard field. Thus, introducing such parasitoid attractants in orchard habitat may improve the biological control effect to pests.
研究领域:
昆虫学
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生物防治
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生态学
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高影响因子
ENVIRONMENTAL RESEARCH
·
2024
·
IF 7.7
Dawei Wang,Gaoen Wu,Jing Tian,Chan Li,Jiemin Liu,Longchao Liang,Guangle Qiu
Compound-specific isotope analysis of nitrogen in amino acids (CSIA-AA, δ 15 N AA ) has gained increasing popularity for elucidating energy flow within food chains and determining the trophic positions of various organisms. However, there is a lack of research on the impact of hydrolysis conditions, such as HCl concentration and hydrolysis time, on δ 15 N AA analysis in biota samples. In this study, we investigated two HCl concentrations (6 M and 12 M) and four hydrolysis times (2 h, 6 h, 12 h, and 24 h) for hydrolyzing and derivatizing AAs in reference materials (Tuna) and biological samples of little egret (n = 4), night heron (n = 4), sharpbelly (n = 4) and Algae (n = 1) using the n-pivaloyl-iso-propyl (NPIP) ester approach. A Dowex cation exchange resin was used to purify amino acids before derivatization. We then determined δ 15 N AA values using gas chromatography-combustion-isotope ratio mass spectrometry (GC-C-IRMS). The results revealed no significant differences (p > 0.05) in δ 15 N AA values among samples treated with different HCl concentrations or hydrolysis times, particularly for δ 15 N Glx (range: 21.0–23.5‰) and δ 15 N Phe (range: 4.3–5.4‰) in Tuna (12 M). Trophic positions (TPs) calculated based on δ 15 N AA at 2 h (little egret: 2.9 ± 0.1, night heron: 2.8 ± 0.1, sharpbelly: 2.0 ± 0.1 and Algae: 1.3 ± 0.2) were consistent with those at 24 h (3.1 ± 0.1, 2.8 ± 0.1, 2.2 ± 0.1 and 1.1 ± 0.1, respectively), suggesting that a 2-h hydrolysis time and a 6 M HCl concentration are efficient pretreatment conditions for determining δ 15 N AA and estimating TP. Compared to the currently used hydrolysis conditions (24 h, 6 M), the proposed conditions (2 h, 6 M) accelerated the δ 15 N AA assay, making it faster, more convenient, and more efficient. Further research is needed to simplify the operational processes and reduce the time costs, enabling more efficient applications of CSIA-AA.
研究领域:
生态学
·
生物地球化学
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PubMed
高影响因子
SCIENCE OF THE TOTAL ENVIRONMENT
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2022
·
IF 10.753
Wanyu He,Jiaqi Ding,Wanni Liu,Wenjue Zhong,Lingyan Zhu,Lin Zhu,Jianfeng Feng
Due to the widespread use of organophosphate esters (OPEs), the occurrence and trophic transfer of OPEs have attracted attentions in ecosystems. However, as the final sink for these chemicals, the bioaccumulations and trophodynamics of OPEs in marine ecosystems are still not clear. In this study, seawater, sediment and marine organisms collected from Bohai Bay (BHB), Laizhou Bay (LZB), and Liaodong Bay (LDB) in Bohai Sea (BS), China were analyzed to investigate the occurrence, bioaccumulation and trophic transfer of typical OPEs. Total concentration of OPEs (∑ 9 OPEs) in surface water in LZB (255.8 ± 36.44 ng/L) and BHB (209.6 ± 35.61 ng/L) was higher than that in LDB (170.0 ± 63.73 ng/L). Marine organisms in LZB accumulated the highest concentrations of OPEs among the 3 bays (∑ 10 OPEs, 70.56 ± 61.36 ng/g ww). Average bioaccumulation factor (BAF) of OPEs in marine organism in BHB, LZB, and LDB was ranged from −2.48 to 0.16, from −2.96 to 1.78, and from −2.59 to 0.59. We also found that trophic magnification factors (TMF) are generally <1, which suggested trophic dilutions of OPEs in BS, China. Nevertheless, the relatively high OPEs levels in BS still may bring potential risks to ecosystem and human health.
研究领域:
环境科学
·
生态学
·
海洋学
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DOI
PubMed
高影响因子
ENVIRONMENTAL SCIENCE & TECHNOLOGY
·
2023
·
IF 11.4
Qianyi Huang,Rui Hou,Lang Lin,Hengxiang Li,Shan Liu,Yuanyue Cheng,Xiangrong Xu
The accumulation and trophodynamics of organophosphate flame retardants (OPFRs) and their metabolites were investigated in the estuarine food web of the Pearl River, China. The mean ∑OPFR concentration among the investigated species increased in the following order: fish [431 ± 346 ng/g lipid weight (lw)] < snail (1310 ± 621 ng/g lw) < shrimp (1581 ± 1134 ng/g lw) < crab (1744 ± 1397 ng/g lw). The di-alkyl phosphates (DAPs) of di-(n-butyl) phosphate (DNBP), bis(2-butoxyethyl) phosphate (BBOEP), and diphenyl phosphate (DPHP) were the most abundant metabolites, with concentrations same as or even higher than their corresponding parent compounds. The log bioaccumulation factors for most OPFRs were lower than 3.70, and significant biomagnification was only found for trisphenyl phosphate [TPHP, with the trophic magnification factors (TMFs) > 1]. The TMFs of OPFRs, except for TPHP and tributyl phosphate had a positive correlation with lipophilicity (log KOW, p ≤ 0.05) and a negative correlation with the biotransformation rate (log KM, p ≤ 0.05). The mean TMF > 1 was observed for all of the OPFR metabolites based on the bootstrap regression method. The “pseudo-biomagnification” of OPFR metabolites might be attributed to the biotransformation of OPFRs in organisms at high trophic levels.
研究领域:
环境科学
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生态学
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PubMed
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2023
·
IF 13.6
Chuan-Sheng Sun,Sheng-Wu Yuan,Rui Hou,Si-Qi Zhang,Qian-Yi Huang,Lang Lin,Heng-Xiang Li,Shan Liu,Yuan-Yue Cheng,Zhi-Hua Li,Xiang-Rong Xu
Tetrabromobisphenol A (TBBPA) analogues have been investigated for their prevalent occurrence in environments and potential hazardous effects to humans and wildlife; however, there is still limited knowledge regarding their toxicokinetics and trophic transfer in aquatic food chains. Using a developed toxicokinetic model framework, we quantified the bioaccumulation, biotransformation and trophic transfer of tetrabromobisphenol S (TBBPS) and tetrabromobisphenol A di(allyl ether) (TBBPA-DAE) during trophic transfer from brine shrimp ( Artemia salina ) to zebrafish ( Danio rerio ). The results showed that the two TBBPA analogues could be readily accumulated by brine shrimp, and the estimated bioconcentration factor ( BCF ) value of TBBPS (5.68 L kg -1 ww) was higher than that of TBBPA-DAE (1.04 L kg -1 ww). The assimilation efficiency (AE) of TBBPA-DAE in zebrafish fed brine shrimp was calculated to be 16.3%, resulting in a low whole-body biomagnification factor ( BMF ) in fish (0.684 g g -1 ww). Based on the transformation products screened using ultra-high-performance liquid chromatograph-high resolution mass spectrometry (UPLC-HRMS), oxidative debromination and hydrolysis were identified as the major transformation pathways of TBBPS, while the biotransformation of TBBPA-DAE mainly took place through ether bond breaking and phase-II metabolism. Lower accumulation of TBBPA as a metabolite than its parent chemical was observed in both brine shrimp and zebrafish, with metabolite parent concentration factors ( MPCFs ) < 1. The investigated BCFs for shrimp of the two TBBPA analogues were only 3.77 × 10 -1 0 - 5.59 × 10 -3 times of the theoretical K shrimp-water based on the polyparameter linear free energy relationships (pp-LFERs) model, and the BMF of TBBPA-DAE for fish was 0.299 times of the predicted K shrimp-fish . Overall, these results indicated the potential of the trophic transfer in bioaccumulation of specific TBBPA analogues in higher trophic-level aquatic organisms and pointed out biotransformation as an important mechanism in regulating their bioaccumulation processes. Environmental Implication The internal concentration of a pollutant in the body determines its toxicity to organisms, while bioaccumulation and trophic transfer play important roles in elucidating its risks to ecosystems. Tetrabromobisphenol A (TBBPA) analogues have been extensively investigated for their adverse effects on humans and wildlife; however, there is still limited knowledge regarding their toxicokinetics and trophic transfer in aquatic food chains. This study investigated the bioaccumulation, biotransformation and trophic transfer of TBBPS and TBBPA-DAE in a simulated di-trophic food chain. This state-of-art study will provide a reference for further research on this kind of emerging pollutant in aquatic environments.
研究领域:
环境科学
·
生态毒理学
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PubMed
高影响因子
WATER RESEARCH
·
2023
·
IF 12.8
Shanqi Zhou,Mengru Fu,Siyuan Ling,Zhihua Qiao,Kailun Luo,Cheng Peng,Wei Zhang,Juying Lei,Bingsheng Zhou
The extensive utilization of both legacy and novel brominated flame retardants (BFRs) leads to high environmental concentrations, which would be bioaccumulated by organisms and further transferred through the food webs, causing potential risks to humans. In this study, five BFRs, that showed high detection frequencies and concentrations in sediments from an e-waste dismantling site in Southern China, namely 2,3,4,5,6-pentabromotoluene (PBT), hexabromobenzene (HBB), 1,2-bis(2,4,6-tribromophenoxy) ethane (BTBPE), decabromodiphenyl ethane (DBDPE), and decabromodiphenyl ether (BDE209), were selected as target pollutants in the lab-constructed aquatic food web as part of a micro-ecosystem, to investigate their distribution, bioaccumulation, and trophic transfer patterns. The significant correlations between different samples in the food web indicated that the dietary uptake appeared to influence the levels of BFRs in organisms. Significant negative correlations were observed between the trophic level of organisms and the lipid-normalized concentrations of BTBPE and DBDPE, indicating the occurrence of trophic dilution after 5-month exposure. However, the average values of bioaccumulation factors (BAFs) were from 2.49 to 5.17 L/kg, underscoring the importance of continued concern for environmental risks of BFRs. The organisms occupying higher trophic levels with greater bioaccumulation capacities may play a pivotal role in determining the trophic magnification potentials of BFRs. This research provides a helpful reference for studying the impacts of feeding habits on bioaccumulation and biomagnification, as well as for identifying the fate of BFRs in aquatic environment.
研究领域:
生态学
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环境科学
·
毒理学
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PubMed
高影响因子
Insects
·
2025
·Vol. 16
·期 8
·804
·
IF 2.9
Lina Pan,Wenfang Gao,Zhiqin Song,Xiaoyu Li,Yipeng Wei,Guangyan Qin,Yiping Hu,Zeyang Sun,Cuiqing Gao,Penghua Bai,Gengping Zhu,Wenjie Wang,Min Li
Simple SummaryThe tri-trophic interactions among the fall webworm (Hyphantria cunea), its host plants, and its parasitoid wasp (Chouioia cunea) were investigated, with particular focus on the correlation betweenH. cunea’s host plant preference and the attractiveness of these plants toC. cunea. It was found thatMorus alba, despite providing suboptimal nutritional quality forH. cunealarvae, became the most preferred host plant due to its significantly reduced attraction toC. cuneacompared to alternative host species. Through volatile analysis,M. albawas identified to lack tridecane emission, a key semiochemical that attractsC. cunea. These results demonstrate adaptive host selection behavior inH. cuneathat minimizes parasitism risk, providing novel insights for refining biological control strategies against this invasive species.Plants and insects are developing strategies to avoid each other’s defense systems. Host plants may release volatile compounds to attract the natural enemies of herbivores; insect pests may also select host plants that are deterrent to natural enemies to avoid such predation. Here we investigated whether the host plant preference ofHyphantria cuneacorrelates with the attractiveness of these plants toChouioia cunea, a parasitoid wasp that serves as the primary natural enemy ofH. cunea. We foundMorus albawas the preferred host plant for femaleH. cunea. AlthoughM. albaprovided suboptimal nutritional value forH. cuneagrowth and development compared to other plants, it attracted fewerC. cunearelative to alternative host plants. Gas chromatography–mass spectrometry (GC–MS) coupled with gas chromatography–electroantennographic detection (GC-EAD) analysis identified six distinct compounds among the herbivore-induced plant volatiles (HIPVs) produced followingH. cuneafeeding. Notably,M. albawas the sole plant species that did not emit tridecane. These results suggest thatH. cuneautilizesM. albaas a reduced predation enemy-free space, thereby minimizing parasitization byC. cunea. Our research emphasizes the importance of considering adaptive responses of herbivores within the context of multi-trophic relationships, rather than solely focusing on optimizing herbivore growth on the most nutritionally suitable plant host.
研究领域:
生态学
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昆虫行为学
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化学生态学
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生物防治
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入侵生物学
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PubMed
高影响因子
ENVIRONMENTAL POLLUTION
·
2020
·
IF 6.793
Xuexia Zhu,Zeshuang Wang,Yunfei Sun,Lei Gu,Lu Zhang,Jun Wang,Yuan Huang,Zhou Yang
The ecotoxicology of surfactants is attracting wide attention due to the rapidly expanding global application. As interspecific relationships play one of the central roles in structuring biological communities, it is necessary to take it into risk assessments on surfactants. With this aim, our study investigated the interference of three common surfactants on the inducible defense of a freshwater phytoplankton Scenedesmus obliquus . Nonlethal environmentally relevant concentrations (10 and 100 μg L −1 ) of several surfactants were set up. Results showed that growth and photosynthetic efficiency of Scenedesmus were inhibited during first 96 h, but recovered in the later stage. Surfactants interfered inducible defense of Scenedesmus against Daphnia grazing, and the interference was related to chemical characteristics of surfactants. The anionic surfactant sodium dodecyl sulfate (SDS) enhanced the colony formation even without grazing cues, whereas fewer defensive colonies were formed under the effects of cationic surfactant benzalkonium bromide (BZK) and nonionic surfactant polyoxyethylene (40) nonylphenol ether (NPE). These findings highlighted the sensitivity of grazer-induced morphological defense of Scenedesmus to surfactants even at nonlethal concentrations, which potentially affects the energy and information flow between trophic levels . This study appeals for more attention to take interspecific relationships into consideration in assessing the potential ecological risk of pollutants.
研究领域:
生态毒理学
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环境科学
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水生生态学
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PubMed
高影响因子
Marine Drugs
·
2025
·Vol. 23
·期 12
·459
·
IF 5.4
Caihong Chen,Haiyan Wu,Guanchao Zheng,Limin Lu,Zhijun Tan
Prorocentrum lima is a widely distributed and major source of diarrhetic shellfish toxins (DSTs); the ecological impact of diol-estered DSTs (eDSTs) compounds on benthic systems is still inadequate. In this study, the acute toxicity of eDSTs was evaluated in Caenorhabditis elegans , and their accumulation capacity and toxic effects were examined in Mytilus galloprovincialis for an ecological risk assessment. The results indicated that larvae 1 (L1) was more sensitive than larvae 4 (L4) of C. elegans , and the eDSTs in P. lima extract lysate were more toxic than the okadaic acid (OA) standard solution. The lowest LC 50 values were 0.293 and 0.469 μg/mL for L1 and L4, respectively. The growth, productivity, and intestinal permeability of C. elegans were impaired, and the effect of P. lima extract lysate on C. elegans was greater than that of the OA standard solution. The total toxin concentration in the digestive gland of mussels reached 3230 μg/kg, with esterified DSTs accounting for 76.7–97.1% of total toxins and inducing marked oxidative stress. Diol-estered DSTs exert direct toxic effects, including oxidative damage and growth inhibition, while exhibiting a high accumulation potential. This study revealed the toxicity of eDSTs, necessitating a focused investigation to comprehensively assess their toxicological impact and ecological risks.
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高影响因子
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