1
|
Chen Q, Feng Y, Ran Z, Zhou Z, Li Q, Luo Y, Cai S, Chen S, Yang J, Tian X. Soil Cd increased the leaf litter Cd remains of Solanum nigrum and Solanum lycopersicum. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2024; 347:123703. [PMID: 38442822 DOI: 10.1016/j.envpol.2024.123703] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/31/2023] [Revised: 02/29/2024] [Accepted: 03/01/2024] [Indexed: 03/07/2024]
Abstract
Plant litter decomposition is a natural pathway of heavy metal cycling in soil ecosystems, but the dynamics of heavy metal release during litter decomposition are relatively poorly understood. The purpose of this study was to investigate the effects of species, soil fauna and soil Cd addition on litter decomposition and Cd release dynamics. Therefore, we selected two plants, Solanum nigrum and S. lycopersicum with large differences in Cd accumulation capacity. First, they were enriched with Cd during the growing period and leaf litter was harvested after 6 months of pretreatment. Then, the decomposition of leaf litter was conducted with or without soil Cd and Eisenia fetida through lab pot tests. Our results showed that leaf litter Cd led to a significant decrease in litter decomposition rate (K value), with a maximum decrease of 32.1% in S. nigrum and 30.1% in S. lycopersicum. We observed that the presence of E. fetida significantly increased K value, but the effect was similar in the +leaf Cd treatment and the -leaf Cd treatment, both for S. nigrum and S. lycopersicum. Interestingly, the litter Cd concentration did not decrease during decomposition, but showed an increasing trend, especially for S. nigrum in the +soil Cd treatment. Moreover, the litter Cd remains was higher in the +soil Cd treatment compared to the -soil Cd treatment for both S. nigrum and S. lycopersicum, no matter whether with or without E. fetida. This result suggests that the Cd may be transferred from soil to litter, thus increasing the litter Cd remains. Overall, our study shows that leaf litter Cd slowed down the carbon cycling in ecosystems. In addition, the release of litter Cd has a lag, and the litter has a certain adsorption capacity for soil Cd, which intensifies the harm to the ecology during litter transfer.
Collapse
Affiliation(s)
- Qi Chen
- School of Life Sciences, Nanjing University, Nanjing, 210023, China
| | - Yuxuan Feng
- School of Life Sciences, Nanjing University, Nanjing, 210023, China
| | - Zunian Ran
- School of Life Sciences, Nanjing University, Nanjing, 210023, China
| | - Zeyan Zhou
- School of Life Sciences, Nanjing University, Nanjing, 210023, China
| | - Qianwei Li
- School of Life Sciences, Nanjing University, Nanjing, 210023, China
| | - Yunchao Luo
- School of Life Sciences, Shanxi Normal University, Taiyuan, 030031, China
| | - Sulin Cai
- School of Life Sciences, Nanjing University, Nanjing, 210023, China
| | - Siyuan Chen
- School of Life Sciences, Nanjing University, Nanjing, 210023, China
| | - Junbo Yang
- Guangxi Institute of Botany, Guangxi Zhuang Autonomous Region and Chinese Academy of Sciences, Guilin, 541006, China
| | - Xingjun Tian
- School of Life Sciences, Nanjing University, Nanjing, 210023, China; School of Ecological and Environmental Engineering, Qinghai University, Xining, 810016, China.
| |
Collapse
|
2
|
Loureiro RC, Biasi C, Hepp LU. Effects of copper and cadmium on stream leaf decomposition: evidence from a microcosm study. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2024; 31:2511-2520. [PMID: 38066267 DOI: 10.1007/s11356-023-31282-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/03/2023] [Accepted: 11/24/2023] [Indexed: 01/18/2024]
Abstract
We seek to understand how copper and cadmium act on leaf litter decomposition by their effects on microbial conditioning and litter fragmentation by invertebrates. In this study, we evaluated, in an integrated manner, different biological elements responsible for functioning of streams. Thus, we performed a microcosm assay with different concentrations for the two metals and their combination, evaluating their effects on fungi sporulation rate, consumption rate by shredders, and, consequently, the leaf litter decomposition rates. Sporulation rates were affected by all copper concentrations tested 10 × = 16 µg L-1 and 25 × = 40 µg L-1) but significantly reduced only at the highest concentration of cadmium (25 × = 22.5 µg L-1). Increased copper and cadmium concentrations reduced the consumption of leaf litter by Phylloicus at 60%. The concentrations (10 × and 25 ×) of both metals resulted in a reduction in decomposition rates. When combined, copper and cadmium negatively affected microbial conditioning, consumption by shredders, and leaf litter decomposition. Increases in concentrations of copper and cadmium directly affected organic matter decomposition in aquatic environments. Thus, the presence of a high concentration of heavy metals in aquatic environments alters the functioning of ecosystems. As trace-elements occur in a combined manner in environments, our results show that the combined effects of different metals potentiate the negative effects on ecosystem processes.
Collapse
Affiliation(s)
- Rafael Chaves Loureiro
- Programa de Pós-Graduação Em Biologia de Ambientes Aquáticos Continentais, Fundação Universidade Do Rio Grande, Av. Itália, Km 8 - Campus Carreiros, Rio Grande, Rio Grande Do Sul, 96203-900, Brazil
| | - Cristiane Biasi
- Programa de Pós-Graduação Em Ecologia, Universidade Regional Integrada Do Alto Uruguai E das Missões, Av. Sete de Setembro, 1621, Erechim, Rio Grande Do Sul, 99709-910, Brazil
| | - Luiz Ubiratan Hepp
- Programa de Pós-Graduação Em Biologia de Ambientes Aquáticos Continentais, Fundação Universidade Do Rio Grande, Av. Itália, Km 8 - Campus Carreiros, Rio Grande, Rio Grande Do Sul, 96203-900, Brazil.
- Laboratório de Indicadores Ambientais, Universidade Federal de Mato Grosso Do Sul, Campus Três Lagoas, Av. Ranulpho Marques Leal 3484, Distrito Industrial, Três Lagoas, Mato Grosso Do Sul, 79613-000, Brazil.
| |
Collapse
|
3
|
BERTOL EMANUELC, BIASI CRISTIANE, LOUREIRO RAFAELC, MIELNICZKI-PEREIRA ALBANINA, RESTELLO ROZANEM, HEPP LUIZU. The effect of arsenic on the structure and composition of stream hyphomycetes assemblages. AN ACAD BRAS CIENC 2022; 94:e20210192. [DOI: 10.1590/0001-3765202220210192] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2021] [Accepted: 02/06/2022] [Indexed: 11/21/2022] Open
Affiliation(s)
- EMANUEL C. BERTOL
- Universidade Regional Integrada do Alto Uruguai e das Missões, Brazil
| | - CRISTIANE BIASI
- Universidade Regional Integrada do Alto Uruguai e das Missões, Brazil
| | | | | | | | - LUIZ U. HEPP
- Universidade Federal de Mato Grosso do Sul, Brazil
| |
Collapse
|
4
|
Liu C, Duan C, Meng X, Yue M, Zhang H, Wang P, Xiao Y, Hou Z, Wang Y, Pan Y. Cadmium pollution alters earthworm activity and thus leaf-litter decomposition and soil properties. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2020; 267:115410. [PMID: 32866867 DOI: 10.1016/j.envpol.2020.115410] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/22/2020] [Revised: 07/17/2020] [Accepted: 08/08/2020] [Indexed: 06/11/2023]
Abstract
It has been reported that heavy metal contamination can affect litter decomposition and soil properties through its impact on microbial communities. However, it is still unclear whether the expected changes in earthworm activities in responses to heavy metal contamination could affect these properties. Therefore, we quantified earthworm (Eisenia fetida) responses in survival rate to lethal cadmium (Cd) concentrations (0, 50, 100, 150, 200, 250, and 300 mg L-1), and in burrowing ability, physiological characteristics, and feeding rate (on poplar leaf litter) to sub-lethal Cd concentrations (0, 15, 30, and 45 mg kg-1). Finally, sub-lethal influences of Cd on the decomposition rate of poplar leaf litter and on soil properties were investigated in the present of E. fetida. The 12-, 24-, 36-, and 48-h LC50 of Cd for E. fetida were 276.0, 208.6, 192.6, 179.8 mg L-1, respectively. With increasing Cd concentration, malondialdehyde was stimulated, superoxide dismutase first increased and then decreased, while feeding rate, total borrowing length, and maximum burrowing depth consistently decreased. Consequently, leaf-litter decomposition rate and soil nutrient concentrations generally decreased with increasing Cd concentration. Our results indicate that, by affecting earthworm activities, Cd inhibited leaf-litter decomposition and led to the degradation of soil fertility. This study highlights the importance of earthworms in mediating soil functions under heavy metal stress.
Collapse
Affiliation(s)
- Change Liu
- School of Ecology and Environmental Sciences & Yunnan Key Laboratory for Plateau Mountain Ecology and Restoration of Degraded Environments, Yunnan University, Kunming, Yunnan, 650091, China; School of Ecology and Environmental Sciences, Yunnan University, Kunming, 650091, China
| | - Changqun Duan
- School of Ecology and Environmental Sciences & Yunnan Key Laboratory for Plateau Mountain Ecology and Restoration of Degraded Environments, Yunnan University, Kunming, Yunnan, 650091, China; School of Ecology and Environmental Sciences, Yunnan University, Kunming, 650091, China
| | - Xianghuai Meng
- School of Ecology and Environmental Sciences & Yunnan Key Laboratory for Plateau Mountain Ecology and Restoration of Degraded Environments, Yunnan University, Kunming, Yunnan, 650091, China; School of Ecology and Environmental Sciences, Yunnan University, Kunming, 650091, China
| | - Minhui Yue
- School of Ecology and Environmental Sciences & Yunnan Key Laboratory for Plateau Mountain Ecology and Restoration of Degraded Environments, Yunnan University, Kunming, Yunnan, 650091, China; School of Ecology and Environmental Sciences, Yunnan University, Kunming, 650091, China
| | - Hao Zhang
- School of Life Science, Yunnan Normal University, Kunming, 650500, China
| | - Peng Wang
- School of Ecology and Environmental Sciences & Yunnan Key Laboratory for Plateau Mountain Ecology and Restoration of Degraded Environments, Yunnan University, Kunming, Yunnan, 650091, China; School of Ecology and Environmental Sciences, Yunnan University, Kunming, 650091, China
| | - Yanlan Xiao
- School of Ecology and Environmental Sciences & Yunnan Key Laboratory for Plateau Mountain Ecology and Restoration of Degraded Environments, Yunnan University, Kunming, Yunnan, 650091, China; School of Ecology and Environmental Sciences, Yunnan University, Kunming, 650091, China
| | - Zhiyong Hou
- Dongting Lake Station for Wetland Ecosystem Research, Institute of Subtropical Agriculture, The Chinese Academy of Sciences, Changsha, 410125, China
| | - Yuanfeng Wang
- School of Ecology and Environmental Sciences & Yunnan Key Laboratory for Plateau Mountain Ecology and Restoration of Degraded Environments, Yunnan University, Kunming, Yunnan, 650091, China; School of Ecology and Environmental Sciences, Yunnan University, Kunming, 650091, China
| | - Ying Pan
- School of Ecology and Environmental Sciences & Yunnan Key Laboratory for Plateau Mountain Ecology and Restoration of Degraded Environments, Yunnan University, Kunming, Yunnan, 650091, China; School of Ecology and Environmental Sciences, Yunnan University, Kunming, 650091, China.
| |
Collapse
|
5
|
Beaumelle L, De Laender F, Eisenhauer N. Biodiversity mediates the effects of stressors but not nutrients on litter decomposition. eLife 2020; 9:55659. [PMID: 32589139 PMCID: PMC7402682 DOI: 10.7554/elife.55659] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2020] [Accepted: 06/24/2020] [Indexed: 12/16/2022] Open
Abstract
Understanding the consequences of ongoing biodiversity changes for ecosystems is a pressing challenge. Controlled biodiversity-ecosystem function experiments with random biodiversity loss scenarios have demonstrated that more diverse communities usually provide higher levels of ecosystem functioning. However, it is not clear if these results predict the ecosystem consequences of environmental changes that cause non-random alterations in biodiversity and community composition. We synthesized 69 independent studies reporting 660 observations of the impacts of two pervasive drivers of global change (chemical stressors and nutrient enrichment) on animal and microbial decomposer diversity and litter decomposition. Using meta-analysis and structural equation modeling, we show that declines in decomposer diversity and abundance explain reduced litter decomposition in response to stressors but not to nutrients. While chemical stressors generally reduced biodiversity and ecosystem functioning, detrimental effects of nutrients occurred only at high levels of nutrient inputs. Thus, more intense environmental change does not always result in stronger responses, illustrating the complexity of ecosystem consequences of biodiversity change. Overall, these findings provide strong evidence that the consequences of observed biodiversity change for ecosystems depend on the kind of environmental change, and are especially significant when human activities decrease biodiversity.
Collapse
Affiliation(s)
- Léa Beaumelle
- German Centre for Integrative Biodiversity Research (iDiv) Halle-Jena-Leipzig, Leipzig, Germany.,Institute of Biology, Leipzig University, Leipzig, Germany
| | - Frederik De Laender
- Research Unit of Environmental and Evolutionary Biology, Namur Institute of Complex Systems, and Institute of Life, Earth, and the Environment, University of Namur, Namur, Belgium
| | - Nico Eisenhauer
- German Centre for Integrative Biodiversity Research (iDiv) Halle-Jena-Leipzig, Leipzig, Germany.,Institute of Biology, Leipzig University, Leipzig, Germany
| |
Collapse
|
6
|
Pimentão AR, Pascoal C, Castro BB, Cássio F. Fungistatic effect of agrochemical and pharmaceutical fungicides on non-target aquatic decomposers does not translate into decreased fungi- or invertebrate-mediated decomposition. THE SCIENCE OF THE TOTAL ENVIRONMENT 2020; 712:135676. [PMID: 31787296 DOI: 10.1016/j.scitotenv.2019.135676] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/20/2019] [Revised: 11/19/2019] [Accepted: 11/19/2019] [Indexed: 06/10/2023]
Abstract
Leaf litter decomposition is a key ecological process in freshwater ecosystems. Fungi, particularly aquatic hyphomycetes, play a major role in organic matter turnover and constitute a pivotal node in detrital food webs. The extensive use of antifungal formulations, which include agrochemicals and pharmaceuticals, is a threat to biodiversity and may affect non-target microbial and invertebrate decomposer communities. Using a laboratory approach, we assessed the effects of tebuconazole (agrochemical), clotrimazole and terbinafine (pharmaceuticals) on aquatic communities and on the decomposition of plant litter. Alder leaves were colonized by natural microbiota in a clean stream, and then exposed in microcosms to 8 concentrations of each fungicide (10 to 1280 μg L-1). Fungicides led to shifts in species dominance in all tested concentrations, but no effects on leaf decomposition were observed. In addition, tebuconazole and clotrimazole strongly reduced fungal biomass and reproduction, whilst terbinafine stimulated fungal reproduction at lower concentrations but had no measurable effects on fungal biomass. Subsequently, the indirect effects of the fungicides were assessed on the next trophic level (detritivore invertebrates), by evaluating leaf consumption by a specialist (Allogamus sp.) and a generalist (Chironomus riparius) species, when feeding on fungicide-preconditioned leaves. The feeding activity of C. riparius and Allogamus sp. was not affected, and as expected, specialists were more efficient than generalists in exploring leaves as a dietary resource. However, results indicated that these fungicides have direct negative effects on microbial decomposers, and thus may compromise ecosystem functions on the long term.
Collapse
Affiliation(s)
- Ana Rita Pimentão
- Centre of Molecular and Environmental Biology (CBMA), Department of Biology, University of Minho, Campus de Gualtar, 4710-057 Braga, Portugal; Institute of Science and Innovation for Bio-sustainability (IB-S), University of Minho, Campus de Gualtar, 4710-057 Braga, Portugal
| | - Cláudia Pascoal
- Centre of Molecular and Environmental Biology (CBMA), Department of Biology, University of Minho, Campus de Gualtar, 4710-057 Braga, Portugal; Institute of Science and Innovation for Bio-sustainability (IB-S), University of Minho, Campus de Gualtar, 4710-057 Braga, Portugal
| | - Bruno B Castro
- Centre of Molecular and Environmental Biology (CBMA), Department of Biology, University of Minho, Campus de Gualtar, 4710-057 Braga, Portugal; Institute of Science and Innovation for Bio-sustainability (IB-S), University of Minho, Campus de Gualtar, 4710-057 Braga, Portugal.
| | - Fernanda Cássio
- Centre of Molecular and Environmental Biology (CBMA), Department of Biology, University of Minho, Campus de Gualtar, 4710-057 Braga, Portugal; Institute of Science and Innovation for Bio-sustainability (IB-S), University of Minho, Campus de Gualtar, 4710-057 Braga, Portugal
| |
Collapse
|
7
|
Duarte S, Antunes B, Trabulo J, Seena S, Cássio F, Pascoal C. Intraspecific diversity affects stress response and the ecological performance of a cosmopolitan aquatic fungus. FUNGAL ECOL 2019. [DOI: 10.1016/j.funeco.2019.06.001] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
|
8
|
El-Sayed WS, Elbahloul Y, Saad ME, Hanafy AM, Hegazi AH, ElShafei GMS, Elbadry M. Impact of nanoparticles on transcriptional regulation of catabolic genes of petroleum hydrocarbon-degrading bacteria in contaminated soil microcosms. J Basic Microbiol 2018; 59:166-180. [PMID: 30468270 DOI: 10.1002/jobm.201800186] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2018] [Revised: 09/29/2018] [Accepted: 10/09/2018] [Indexed: 11/09/2022]
Abstract
This study was conducted to determine what effects nanoparticles (NPs) like TiO2 , ZnO, and Ag may pose on natural attenuation processes of petroleum hydrocarbons in contaminated soils. The solid NPs used were identified using x-ray diffraction technique and their average size was certified as 18.2, 16.9, and 18.3 nm for Ag-NPs, ZnO-NPs, and TiO2 -NPs, respectively. NPs in soil microcosms behave differently where it was dissolved as in case of Ag-NPs, partially dissolved as in ZnO-NPs or changed into other crystalline phase as in TiO2 -NPs. In this investigation, catabolic gene encoding catechol 2,3 dioxygenase (C23DO) was selected specifically as biomarker for monitoring hydrocarbon biodegradation potential by measuring its transcripts by RT-qPCR. TiO2 -NPs amended microcosms showed almost no change in C23DO expression profile or bacterial community which were dominated by Bacillus sp., Mycobacterium sp., Microbacterium sp., Clostridium sp., beside uncultured bacteria, including uncultured proteobacteria, Thauera sp. and Clostridia. XRD pattern suggested that TiO2 -NPs in microcosms were changed into other non-inhibitory crystalline phase, consequently, showing the maximum degradation profile for most low molecular weight oil fractions and partially for the high molecular weight ones. Increasing ZnO-NPs concentration in microcosms resulted in a reduction in the expression of C23DO with a concomitant slight deteriorative effect on bacterial populations ending up with elimination of Clostridium sp., Thauera sp., and uncultured proteobacteria. The oil-degradation efficiency was reduced compared to TiO2 -NPs amended microcosms. In microcosms, Ag-NPs were not detected in the crystalline form but were available in the ionic form that inhibited most bacterial populations and resulted in a limited degradation profile of oil, specifically the low molecular weight fractions. Ag-NPs amended microcosms showed a significant reduction (80%) in C23DO gene expression and a detrimental effect on bacterial populations including key players like Mycobacterium sp., Microbacterium sp., and Thauera sp. involved in the biodegradation of petroleum hydrocarbons.
Collapse
Affiliation(s)
- Wael S El-Sayed
- Biology Department, Faculty of Science, Taibah University, Almadinah Almunawarah, Saudi Arabia.,Microbiology Department, Faculty of Science, Ain Shams University, Cairo, Egypt
| | - Yasser Elbahloul
- Biology Department, Faculty of Science, Taibah University, Almadinah Almunawarah, Saudi Arabia.,Botany and Microbiology Department, Faculty of Science, Alexandria University, Alexandria, Egypt
| | - Mohamed E Saad
- Biology Department, Faculty of Science, Taibah University, Almadinah Almunawarah, Saudi Arabia.,Agricultural Genetic Engineering Research Institute (AGERI), Agricultural Research Center (ARC), Giza, Egypt
| | - Ahmed M Hanafy
- Biology Department, Faculty of Science, Taibah University, Almadinah Almunawarah, Saudi Arabia.,Microbiology Department, Faculty of Science, Ain Shams University, Cairo, Egypt
| | - Abdelrahman H Hegazi
- Chemistry Department, Faculty of Science, Taibah University, Almadinah Almunawarah, Saudi Arabia.,Chemistry Department, Faculty of Science, Alexandria University, Alexandria, Egypt
| | - Gamal M S ElShafei
- Chemistry Department, Faculty of Science, Taibah University, Almadinah Almunawarah, Saudi Arabia.,Chemistry Department, Faculty of Science, Ain Shams University, Cairo, Egypt
| | - Medhat Elbadry
- Biology Department, Faculty of Science, Taibah University, Almadinah Almunawarah, Saudi Arabia.,Agricultural Microbiology Department, Faculty of Agriculture, Fayoum University, Fayoum, Egypt
| |
Collapse
|
9
|
El-Sayed WS, Al-Senani SR, Elbahloul Y. Diversity of dehalorespiring bacteria and selective enrichment of aryl halides-dechlorinating consortium from sedimentary environment near an oil refinery. JOURNAL OF TAIBAH UNIVERSITY FOR SCIENCE 2018. [DOI: 10.1080/16583655.2018.1495869] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Affiliation(s)
- Wael S. El-Sayed
- Department of Biology, Faculty of Science, Taibah University, Medina, KSA
- Microbiology Department, Faculty of Science, Ain Shams University, Cairo, Egypt
| | | | - Yasser Elbahloul
- Department of Biology, Faculty of Science, Taibah University, Medina, KSA
- Botany and Microbiology Department, Faculty of Science, Alexandria University, Alexandria, Egypt
| |
Collapse
|
10
|
Elliott SM, Brigham ME, Lee KE, Banda JA, Choy SJ, Gefell DJ, Minarik TA, Moore JN, Jorgenson ZG. Contaminants of emerging concern in tributaries to the Laurentian Great Lakes: I. Patterns of occurrence. PLoS One 2017; 12:e0182868. [PMID: 28953889 PMCID: PMC5617142 DOI: 10.1371/journal.pone.0182868] [Citation(s) in RCA: 61] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2017] [Accepted: 07/25/2017] [Indexed: 11/18/2022] Open
Abstract
Human activities introduce a variety of chemicals to the Laurentian Great Lakes including pesticides, pharmaceuticals, flame retardants, plasticizers, and solvents (collectively referred to as contaminants of emerging concern or CECs) potentially threatening the vitality of these valuable ecosystems. We conducted a basin-wide study to identify the presence of CECs and other chemicals of interest in 12 U.S. tributaries to the Laurentian Great Lakes during 2013 and 2014. A total of 292 surface-water and 80 sediment samples were collected and analyzed for approximately 200 chemicals. A total of 32 and 28 chemicals were detected in at least 30% of water and sediment samples, respectively. Concentrations ranged from 0.0284 (indole) to 72.2 (cholesterol) μg/L in water and 1.75 (diphenhydramine) to 20,800 μg/kg (fluoranthene) in sediment. Cluster analyses revealed chemicals that frequently co-occurred such as pharmaceuticals and flame retardants at sites receiving similar inputs such as wastewater treatment plant effluent. Comparison of environmental concentrations to water and sediment-quality benchmarks revealed that polycyclic aromatic hydrocarbon concentrations often exceeded benchmarks in both water and sediment. Additionally, bis(2-ethylhexyl) phthalate and dichlorvos concentrations exceeded water-quality benchmarks in several rivers. Results from this study can be used to understand organism exposure, prioritize river basins for future management efforts, and guide detailed assessments of factors influencing transport and fate of CECs in the Great Lakes Basin.
Collapse
Affiliation(s)
- Sarah M. Elliott
- U.S. Geological Survey, Mounds View, Minnesota, United States of America
- * E-mail:
| | - Mark E. Brigham
- U.S. Geological Survey, Mounds View, Minnesota, United States of America
| | - Kathy E. Lee
- U.S. Geological Survey, Grand Rapids, Minnesota, United States of America
| | - Jo A. Banda
- U.S. Fish and Wildlife Service, Columbus, Ohio, United States of America
| | - Steven J. Choy
- U.S. Fish and Wildlife Service, Madison, Wisconsin, United States of America
| | - Daniel J. Gefell
- U.S. Fish and Wildlife Service, Cortland, New York, United States of America
| | - Thomas A. Minarik
- Metropolitan Water Reclamation District of Greater Chicago, Cicero, IL, United States of America
| | - Jeremy N. Moore
- U.S. Fish and Wildlife Service, Chubbuck, Idaho, United States of America
| | - Zachary G. Jorgenson
- Department of Biology, St. Cloud State University, St. Cloud, Minnesota, United States of America
- U.S. Fish and Wildlife Service, Bloomington, Minnesota, United States of America
| |
Collapse
|
11
|
Yang J, Sun H, Zhang H, Zhou H. Expression, purification of metallothionein genes from freshwater crab (Sinopotamon yangtsekiense) and development of an anti-metallothionein ELISA. PLoS One 2017; 12:e0174482. [PMID: 28350826 PMCID: PMC5370132 DOI: 10.1371/journal.pone.0174482] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2016] [Accepted: 03/09/2017] [Indexed: 02/06/2023] Open
Abstract
Using the phoA-fusion technology, the recombinant metallothionein (MT) from freshwater crab (Sinopotamon yangtsekiense) has been successfully produced in Escherichia coli. MT purified from the bacterial suspension showed one polypeptide with a molecular weight of 7 kDa by tricine-sodium dodecyl sulfate-polyacrylamide gel electrophoresis (Tricine-SDS-PAGE). Western-blotting confirmed the polypeptides had a specific reactivity with mouse polyclonal MT anti-serum. Based on the purified MT and MT anti-serum, the reaction parameters for an enzyme-linked immunosorbent assay (ELISA) were developed. The direct coating ELISA showed a higher linear relationship compared to antibody sandwich coating ELISA. The optimal dilution rates of purified MT anti-serum and coating period were shown to be 1:160,000 and 12 hours at 4°C. At 37°C, the appropriate reaction duration of the first antibody and the second antibody were 2 hours and 1 hour, respectively. According to these optimal parameters, the standard linear equation, y = 0.0032x + 0.1769 (R2 = 0.9779, x, y representing MT concentration and OD450 value), was established for the determination of MT concentration with a valid range of 3.9–500 ng/ml. In verification experiments, the mean coefficients of variation of the intra-assay and inter-assay were 3.260% and 3.736%, respectively. According to the result of MT recovery, ELISA with an approaching 100% MT recovery was more reliable and sensitive than the Cd saturation assay. In conclusion, the newly developed ELISA of this study was precise, stable and repeatable, and could be used as a biomarker tool to monitor pollution by heavy metals.
Collapse
Affiliation(s)
- Jian Yang
- Translational Medicine Research Center, Shanxi Medical University, Taiyuan, Shanxi Province, People’s Republic of China
- * E-mail:
| | - Hui Sun
- Institute of Science & Technology of Shanxi, Taiyuan, Shanxi Province, People’s Republic of China
| | - Hao Zhang
- Translational Medicine Research Center, Shanxi Medical University, Taiyuan, Shanxi Province, People’s Republic of China
| | - Hui Zhou
- Translational Medicine Research Center, Shanxi Medical University, Taiyuan, Shanxi Province, People’s Republic of China
| |
Collapse
|
12
|
Barros D, Oliveira P, Pascoal C, Cássio F. Ethanol and phenanthrene increase the biomass of fungal assemblages and decrease plant litter decomposition in streams. THE SCIENCE OF THE TOTAL ENVIRONMENT 2016; 565:489-495. [PMID: 27186876 DOI: 10.1016/j.scitotenv.2016.04.190] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/02/2016] [Revised: 04/26/2016] [Accepted: 04/28/2016] [Indexed: 06/05/2023]
Abstract
Fungi, particularly aquatic hyphomycetes, have been recognized as playing a dominant role in microbial decomposition of plant litter in streams. In this study, we used a microcosm experiment with different levels of fungal diversity (species number and identity) using monocultures and combinations with up to five aquatic hyphomycete species (Articulospora tetracladia, Tricladium splendens, Heliscus submersus, Tetrachaetum elegans and Flagellospora curta) to assess the effects of ethanol and phenanthrene on three functional measures: plant litter decomposition, fungal biomass accrual and reproduction. Alder leaves were conditioned by fungi for 7days and then were exposed to phenanthrene (1mgL(-1)) dissolved in ethanol (0.1% final concentration) or ethanol (at the concentration used to solubilise phenanthrene) for further 24days. Exposure to ethanol alone or in combination with phenanthrene decreased leaf decomposition and fungal reproduction, but increased fungal biomass produced. All aspects of fungal activity varied with species number. Fungal activity in polycultures was generally higher than that expected from the sum of the weighted performances of participating species in monoculture, suggesting complementarity between species. However, the activity of fungi in polycultures did not exceed the activity of the most productive species either in the absence or presence of ethanol alone or with phenanthrene.
Collapse
Affiliation(s)
- Diana Barros
- Centre of Molecular and Environmental Biology (CBMA), Department of Biology, University of Minho, Campus de Gualtar, 4710-057 Braga, Portugal; Institute of Science and Innovation for Bio-Sustainability (IB-S), University of Minho, Campus de Gualtar, 4710-057 Braga, Portugal
| | - Patrícia Oliveira
- Centre of Molecular and Environmental Biology (CBMA), Department of Biology, University of Minho, Campus de Gualtar, 4710-057 Braga, Portugal
| | - Cláudia Pascoal
- Centre of Molecular and Environmental Biology (CBMA), Department of Biology, University of Minho, Campus de Gualtar, 4710-057 Braga, Portugal; Institute of Science and Innovation for Bio-Sustainability (IB-S), University of Minho, Campus de Gualtar, 4710-057 Braga, Portugal
| | - Fernanda Cássio
- Centre of Molecular and Environmental Biology (CBMA), Department of Biology, University of Minho, Campus de Gualtar, 4710-057 Braga, Portugal; Institute of Science and Innovation for Bio-Sustainability (IB-S), University of Minho, Campus de Gualtar, 4710-057 Braga, Portugal.
| |
Collapse
|
13
|
Talk A, Kublik S, Uksa M, Engel M, Berghahn R, Welzl G, Schloter M, Mohr S. Effects of multiple but low pesticide loads on aquatic fungal communities colonizing leaf litter. J Environ Sci (China) 2016; 46:116-125. [PMID: 27521943 DOI: 10.1016/j.jes.2015.11.028] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2015] [Revised: 08/27/2015] [Accepted: 11/19/2015] [Indexed: 06/06/2023]
Abstract
In the first tier risk assessment (RA) of pesticides, risk for aquatic communities is estimated by using results from standard laboratory tests with algae, daphnids and fish for single pesticides such as herbicides, fungicides, and insecticides. However, fungi as key organisms for nutrient cycling in ecosystems as well as multiple pesticide applications are not considered in the RA. In this study, the effects of multiple low pesticide pulses using regulatory acceptable concentrations (RACs) on the dynamics of non-target aquatic fungi were investigated in a study using pond mesocosm. For that, fungi colonizing black alder (Alnus glutinosa) leaves were exposed to multiple, low pulses of 11 different pesticides over a period of 60days using a real farmer's pesticide application protocol for apple cropping. Four pond mesocosms served as treatments and 4 as controls. The composition of fungal communities colonizing the litter material was analyzed using a molecular fingerprinting approach based on the terminal Restriction Fragment Length Polymorphism (t-RFLP) of the fungal Internal Transcribed Spacer (ITS) region of the ribonucleic acid (RNA) gene(s). Our data indicated a clear fluctuation of fungal communities based on the degree of leaf litter degradation. However significant effects of the applied spraying sequence were not observed. Consequently also degradation rates of the litter material were not affected by the treatments. Our results indicate that the nutrient rich environment of the leaf litter material gave fungal communities the possibility to express genes that induce tolerance against the applied pesticides. Thus our data may not be transferred to other fresh water habitats with lower nutrient availability.
Collapse
Affiliation(s)
- Anne Talk
- Research Unit Environmental Genomics, Helmholtz Zentrum München, Ingolstädter Landstraße 1, 85764 Neuherberg, Germany.
| | - Susanne Kublik
- Research Unit Environmental Genomics, Helmholtz Zentrum München, Ingolstädter Landstraße 1, 85764 Neuherberg, Germany
| | - Marie Uksa
- Research Unit Environmental Genomics, Helmholtz Zentrum München, Ingolstädter Landstraße 1, 85764 Neuherberg, Germany
| | - Marion Engel
- Research Unit Environmental Genomics, Helmholtz Zentrum München, Ingolstädter Landstraße 1, 85764 Neuherberg, Germany
| | | | - Gerhard Welzl
- Research Unit Environmental Genomics, Helmholtz Zentrum München, Ingolstädter Landstraße 1, 85764 Neuherberg, Germany
| | - Michael Schloter
- Research Unit Environmental Genomics, Helmholtz Zentrum München, Ingolstädter Landstraße 1, 85764 Neuherberg, Germany.
| | - Silvia Mohr
- Umweltbundesamt, Schichauweg 58, 12307, Berlin, Germany
| |
Collapse
|
14
|
Ismail W, El-Sayed WS, Abdul Raheem AS, Mohamed ME, El Nayal AM. Biocatalytic Desulfurization Capabilities of a Mixed Culture during Non-Destructive Utilization of Recalcitrant Organosulfur Compounds. Front Microbiol 2016; 7:266. [PMID: 26973637 PMCID: PMC4776162 DOI: 10.3389/fmicb.2016.00266] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2015] [Accepted: 02/18/2016] [Indexed: 01/16/2023] Open
Abstract
We investigated the biodesulfurization potential of a mixed culture AK6 enriched from petroleum hydrocarbons-polluted soil with dibenzothiophene (DBT) as a sulfur source. In addition to DBT, AK6 utilized the following compounds as sulfur sources: 4-methyldibenzothiophene (4-MDBT), benzothiophene (BT), and 4,6- dimethyldibenzothiophene (4,6-DM-DBT). None of these compounds supported the growth of AK6 as the sole carbon and sulfur source. AK6 could not grow on dibenzylsulfide (DBS) as a sulfur source. The AK6 community structure changed according to the provided sulfur source. The major DGGE bands represented members of the genera Sphingobacterium, Klebsiella, Pseudomonas, Stenotrophomonas, Arthrobacter, Mycobacterium, and Rhodococcus. Sphingobacterium sp. and Pseudomonas sp. were abundant across all cultures utilizing any of the tested thiophenic S-compounds. Mycobacterium/Rhodococcus spp. were restricted to the 4-MDBT culture. The 4-MDBT culture had the highest species richness and diversity. Biodesulfurization of DBT by resting cells of AK6 produced 2-hydroxybiphenyl (2-HBP) in addition to trace amounts of phenylacetate. AK6 transformed DBT to 2-hydroxybiphenyl with a specific activity of 9 ± 0.6 μM 2-HBP g dry cell weight−1 h−1. PCR confirmed the presence in the AK6 community of the sulfur-specific (4S) pathway genes dszB and dszC. Mixed cultures hold a better potential than axenic ones for the development of a biodesulfurization technology.
Collapse
Affiliation(s)
- Wael Ismail
- Environmental Biotechnology Program, Life Sciences Department, College of Graduate Studies, Arabian Gulf University Manama, Bahrain
| | - Wael S El-Sayed
- Biology Department, Faculty of Science, Taibah University Al-Madinah Al-Monawarah, Saudi Arabia
| | - Abdul Salam Abdul Raheem
- Environmental Biotechnology Program, Life Sciences Department, College of Graduate Studies, Arabian Gulf University Manama, Bahrain
| | - Magdy E Mohamed
- Botany and Microbiology Department, Faculty of Science, Cairo University Giza, Egypt
| | - Ashraf M El Nayal
- Environmental Biotechnology Program, Life Sciences Department, College of Graduate Studies, Arabian Gulf University Manama, Bahrain
| |
Collapse
|
15
|
Ferreira V, Koricheva J, Duarte S, Niyogi DK, Guérold F. Effects of anthropogenic heavy metal contamination on litter decomposition in streams - A meta-analysis. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2016; 210:261-270. [PMID: 26774191 DOI: 10.1016/j.envpol.2015.12.060] [Citation(s) in RCA: 55] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/05/2015] [Revised: 12/14/2015] [Accepted: 12/27/2015] [Indexed: 06/05/2023]
Abstract
Many streams worldwide are affected by heavy metal contamination, mostly due to past and present mining activities. Here we present a meta-analysis of 38 studies (reporting 133 cases) published between 1978 and 2014 that reported the effects of heavy metal contamination on the decomposition of terrestrial litter in running waters. Overall, heavy metal contamination significantly inhibited litter decomposition. The effect was stronger for laboratory than for field studies, likely due to better control of confounding variables in the former, antagonistic interactions between metals and other environmental variables in the latter or differences in metal identity and concentration between studies. For laboratory studies, only copper + zinc mixtures significantly inhibited litter decomposition, while no significant effects were found for silver, aluminum, cadmium or zinc considered individually. For field studies, coal and metal mine drainage strongly inhibited litter decomposition, while drainage from motorways had no significant effects. The effect of coal mine drainage did not depend on drainage pH. Coal mine drainage negatively affected leaf litter decomposition independently of leaf litter identity; no significant effect was found for wood decomposition, but sample size was low. Considering metal mine drainage, arsenic mines had a stronger negative effect on leaf litter decomposition than gold or pyrite mines. Metal mine drainage significantly inhibited leaf litter decomposition driven by both microbes and invertebrates, independently of leaf litter identity; no significant effect was found for microbially driven decomposition, but sample size was low. Overall, mine drainage negatively affects leaf litter decomposition, likely through negative effects on invertebrates.
Collapse
Affiliation(s)
- Verónica Ferreira
- MARE - Marine and Environmental Sciences Centre, Department of Life Sciences, University of Coimbra, Largo Marquês de Pombal, 3004-517, Coimbra, Portugal.
| | - Julia Koricheva
- School of Biological Sciences, Royal Holloway University of London, Egham, Surrey, TW200EX, UK
| | - Sofia Duarte
- CBMA - Centre of Molecular and Environmental Biology, Department of Biology, University of Minho, Campus de Gualtar, 4710-057, Braga, Portugal
| | - Dev K Niyogi
- Department of Biological Sciences, Missouri University of Science & Technology, Rolla, MO, USA
| | - François Guérold
- Laboratoire Interdisciplinaire des Environnements Continentaux (LIEC), Université de Lorraine, UMR 7360, Campus Bridoux, Rue du Géneral Delestraint, 57070, Metz, France; LIEC, CNRS, UMR 7360, 57070, Metz, France
| |
Collapse
|
16
|
Tlili A, Cornut J, Behra R, Gil-Allué C, Gessner MO. Harmful effects of silver nanoparticles on a complex detrital model system. Nanotoxicology 2016; 10:728-35. [DOI: 10.3109/17435390.2015.1117673] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
|
17
|
El-Sayed WS, Ouf SA, Mohamed AAH. Deterioration to extinction of wastewater bacteria by non-thermal atmospheric pressure air plasma as assessed by 16S rDNA-DGGE fingerprinting. Front Microbiol 2015; 6:1098. [PMID: 26500637 PMCID: PMC4594161 DOI: 10.3389/fmicb.2015.01098] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2015] [Accepted: 09/22/2015] [Indexed: 11/21/2022] Open
Abstract
The use of cold plasma jets for inactivation of a variety of microorganisms has recently been evaluated via culture-based methods. Accordingly, elucidation of the role of cold plasma in decontamination would be inaccurate because most microbial populations within a system remain unexplored owing to the high amount of yet uncultured bacteria. The impact of cold atmospheric plasma on the bacterial community structure of wastewater from two different industries was investigated by metagenomic-based polymerase chain reaction-denaturing gradient gel electrophoresis (DGGE) utilizing 16S rRNA genes. Three doses of atmospheric pressure dielectric barrier discharge plasma were applied to wastewater samples on different time scales. DGGE revealed that the bacterial community gradually changed and overall abundance decreased to extinction upon plasma treatment. The bacterial community in food processing wastewater contained 11 key operational taxonomic units that remained almost completely unchanged when exposed to plasma irradiation at 75.5 mA for 30 or 60 s. However, when exposure time was extended to 90 s, only Escherichia coli, Coliforms, Aeromonas sp., Vibrio sp., and Pseudomonas putida survived. Only E. coli, Aeromonas sp., Vibrio sp., and P. putida survived treatment at 81.94 mA for 90 s. Conversely, all bacterial groups were completely eliminated by treatment at 85.34 mA for either 60 or 90 s. Dominant bacterial groups in leather processing wastewater also changed greatly upon exposure to plasma at 75.5 mA for 30 or 60 s, with Enterobacter aerogenes, Klebsiella sp., Pseudomonas stutzeri, and Acidithiobacillus ferrooxidans being sensitive to and eliminated from the community. At 90 s of exposure, all groups were affected except for Pseudomonas sp. and Citrobacter freundii. The same trend was observed for treatment at 81.94 mA. The variability in bacterial community response to different plasma treatment protocols revealed that plasma had a selective impact on bacterial community structure at lower doses and potential bactericidal effects at higher doses.
Collapse
Affiliation(s)
- Wael S El-Sayed
- Biology Department, Faculty of Science, Taibah University Almadinah Almunawarah, Saudi Arabia ; Microbiology Department, Faculty of Science, Ain Shams University Cairo, Egypt
| | - Salama A Ouf
- Biology Department, Faculty of Science, Taibah University Almadinah Almunawarah, Saudi Arabia ; Botany and Microbiology Department, Faculty of Science, Cairo University Giza, Egypt
| | - Abdel-Aleam H Mohamed
- Physics Department, Faculty of Science, Taibah University Almadinah Almunawarah, Saudi Arabia ; Physics Department, Faculty of Science, Beni-Suef University Beni Suef, Egypt
| |
Collapse
|
18
|
El-Sayed WS, Ibrahim RA. Diversity and phylogenetic analysis of endosymbiotic bacteria of the date palm root borer Oryctes agamemnon (Coleoptera: Scarabaeidae). BMC Microbiol 2015; 15:88. [PMID: 25899000 PMCID: PMC4415217 DOI: 10.1186/s12866-015-0422-8] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2014] [Accepted: 04/08/2015] [Indexed: 01/28/2023] Open
Abstract
BACKGROUND The date palm root borer Oryctes agamemnon (Coleoptera: Scarabaeidae) is one of the major pests of palms. In Saudi Arabia, both larvae and adults of Oryctes are particularly troublesome, especially during the establishment of young date palm orchards. Endosymbiotic bacteria are known to have a key role in food digestion and insecticide resistance mechanisms, and therefore are essential to their host insect. Identification of these bacteria in their insect host can lead to development of new insect pest control strategies. RESULTS Metagenomic DNA from larval midgut of the date palm root borer, O. agamemnon, was analyzed for endosymbiotic bacterial communities using denatured gradient gel electrophoresis (DGGE) utilizing 16S rRNA genes. The DGGE fingerprints with metagenomic DNA showed predominance of eleven major operational taxonomic units (OTUs) identified as members of Photobacterium, Vibrio, Allomonas, Shewanella, Cellulomonas, and Citrobacter, as well as uncultured bacteria, including some uncultured Vibrio members. DGGE profiles also showed shifts in the dominant bacterial populations of the original soil compared with those that existed in the larval midguts. The endosymbiotic bacterial community was dominated by members of the family Vibrionaceae (54.5%), followed by uncultured bacteria (18.2%), Enterobacteriaceae (9.1%), Shewanellaceae (9.1%), and Cellulomonadaceae (9.1%). Phylogenetic studies confirmed the affiliation of the dominant OTUs into specified families revealed by clustering of each phylotype to its corresponding clade. Relative frequency of each phylotype in larval midguts revealed predominance of Vibrio furnisii and Vibrio navarrensis, followed by uncultured bacterial spp., then Cellulomonas hominis, Shewanella algae, and Citrobacter freundii. CONCLUSION Analysis of metagenomic DNA for endosymbiotic bacterial communities from the midgut of Oryctes larvae showed strong selection of specific bacterial populations that may have a key role in digestion, as well as other benefits to the larvae of O. agamemnon. Determination of the distinct endosymbiotic community structure and its possible biological functions within the insect could provide us with basic information for future pest control research.
Collapse
Affiliation(s)
- Wael S El-Sayed
- Biology Department, Faculty of Science, Taibah University, Almadinah Almunawarah, 344, Saudi Arabia. .,Microbiology Department, Faculty of Science, Ain Shams University, Cairo, 11566, Egypt.
| | - Reda A Ibrahim
- Biology Department, Faculty of Science, Taibah University, Almadinah Almunawarah, 344, Saudi Arabia. .,Department of Economic Entomology, Kafrelsheikh University, Kafr El-Sheikh, 33516, Egypt.
| |
Collapse
|
19
|
Yang J, Liu D, He Y, Wang L. Mitochondrial energy metabolism in the hepatopancreas of freshwater crabs (Sinopotamon henanense) after cadmium exposure. ENVIRONMENTAL SCIENCE. PROCESSES & IMPACTS 2015; 17:156-165. [PMID: 25425497 DOI: 10.1039/c4em00453a] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Energetic homoeostasis is a fundamental requirement in the defense against cadmium (Cd) stress. Using the freshwater crab Sinopotamon henanense as an example, we explored the effects of Cd on submicroscopic structures in hepatopancreatic cells through transmission electron microscopy (TEM) and energy-related parameters such as adenosine triphosphate/adenosine diphosphate (ATP/ADP) ratios, reduced/oxidized nicotinamide adenine dinucleotide (NADH/NAD(+)) ratios, and the mitochondrial membrane potential (Δψm). The impact of Cd on carbohydrate and protein metabolism, and metallothionein (MT) was also investigated. Experimental 10 day exposure increased NADH and NAD(+) and provided a higher NADH/NAD(+) ratio and Δψm in hepatopancreatic cells. The corresponding significantly increased levels of ATP and the ATP/ADP ratio in the hepatopancreas supported high energy production. The up-regulation of the MT content in exposed crabs suggests that protein synthesis for detoxification could partially be a major ATP consumer. With increasing exposure time, however, energy production was in decline. Excessive energy consumption was explained by substrate mobilization and mitochondrial impairment. Less carbohydrate and enhanced protein catabolism was observed. Ultrastructurally, there were changes in mitochondria with swelling, membrane disruption, shortening of cristae or the rupture and disappearance of entire mitochondria. The rough endoplasmic reticulum (rER) displayed expansion and membrane rupture, suggesting the destruction of protein-synthesizing structures in hepatopancreatic cells. Our findings suggest that energy-related parameters could be used as biomarkers in the monitoring of metal pollution and quantitative risk assessments of pollutant exposure.
Collapse
Affiliation(s)
- Jian Yang
- School of Life Science, Shanxi University, 92 Wucheng Road, Taiyuan 030006, Shanxi Province, People's Republic of China.
| | | | | | | |
Collapse
|
20
|
Campos D, Alves A, Lemos MFL, Correia A, Soares AMVM, Pestana JLT. Effects of cadmium and resource quality on freshwater detritus processing chains: a microcosm approach with two insect species. ECOTOXICOLOGY (LONDON, ENGLAND) 2014; 23:830-839. [PMID: 24648031 DOI: 10.1007/s10646-014-1223-9] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 03/06/2014] [Indexed: 06/03/2023]
Abstract
Detritus processing is vital for freshwater ecosystems that depend on the leaf litter from riparian vegetation and is mediated by microorganisms and aquatic invertebrates. Shredder invertebrates transform coarse particulate organic matter into fine particulate organic matter used as food by collector species. Direct and indirect effects of contaminants can impair detritus processing and thus affect the functioning of these ecosystems. Here, we assessed the combined effects of a toxic metal (cadmium) and resource quality (leaf species) on detritus processing and shredder-collector interactions. We considered two types of leaves, alder and eucalyptus that were microbially conditioned under different Cd concentrations in the laboratory. The microbial communities present on leaves were analyzed by Denaturing Gradient Gel Electrophoresis (DGGE), and we also measured microbial respiration rates. Sericostoma vittatum (a caddisfly shredder) and Chironomus riparius (a midge collector) were also exposed to Cd and allowed to consume the corresponding alder or eucalyptus leaves. We evaluated C. riparius growth and leaf mass loss in multispecies microcosms. Cadmium exposure affected leaf conditioning and fungal diversity on both leaf species, as assessed by DGGE. Cadmium exposure also affected the mass loss of alder leaves by reductions in detritivore feeding, and impaired C. riparius growth. Chironomus riparius consumed alder leaf discs in the absence of shredders, but S. vittatum appear to promote C. riparius growth in treatments containing eucalyptus. These results show that indirect effects of contaminants along detritus-processing chains can occur through effects on shredder-collector interactions such as facilitation but they also depend on the nutritional quality of detritus and on sensitivity and feeding plasticity of detritivore species.
Collapse
Affiliation(s)
- Diana Campos
- Departamento de Biologia and CESAM, Universidade de Aveiro, Campus Santiago, 3810-193, Aveiro, Portugal
| | | | | | | | | | | |
Collapse
|
21
|
Clivot H, Cornut J, Chauvet E, Elger A, Poupin P, Guérold F, Pagnout C. Leaf-associated fungal diversity in acidified streams: insights from combining traditional and molecular approaches. Environ Microbiol 2013; 16:2145-56. [DOI: 10.1111/1462-2920.12245] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2013] [Revised: 07/31/2013] [Accepted: 08/03/2013] [Indexed: 11/29/2022]
Affiliation(s)
- Hugues Clivot
- Laboratoire Interdisciplinaire des Environnements Continentaux (LIEC); Université de Lorraine; UMR 7360 Campus Bridoux rue du Général Delestraint 57070 Metz France
- LIEC; CNRS; UMR 7360 57070 Metz France
| | - Julien Cornut
- Laboratoire Interdisciplinaire des Environnements Continentaux (LIEC); Université de Lorraine; UMR 7360 Campus Bridoux rue du Général Delestraint 57070 Metz France
- LIEC; CNRS; UMR 7360 57070 Metz France
- Laboratoire d'Ecologie Fonctionnelle et Environnement (EcoLab); INP; UPS; Université de Toulouse; UMR 5245 118 Route de Narbonne 31062 Toulouse France
- EcoLab; CNRS; UMR 5245 31062 Toulouse France
| | - Eric Chauvet
- Laboratoire d'Ecologie Fonctionnelle et Environnement (EcoLab); INP; UPS; Université de Toulouse; UMR 5245 118 Route de Narbonne 31062 Toulouse France
- EcoLab; CNRS; UMR 5245 31062 Toulouse France
| | - Arnaud Elger
- Laboratoire d'Ecologie Fonctionnelle et Environnement (EcoLab); INP; UPS; Université de Toulouse; UMR 5245 118 Route de Narbonne 31062 Toulouse France
- EcoLab; CNRS; UMR 5245 31062 Toulouse France
| | - Pascal Poupin
- Laboratoire Interdisciplinaire des Environnements Continentaux (LIEC); Université de Lorraine; UMR 7360 Campus Bridoux rue du Général Delestraint 57070 Metz France
- LIEC; CNRS; UMR 7360 57070 Metz France
| | - François Guérold
- Laboratoire Interdisciplinaire des Environnements Continentaux (LIEC); Université de Lorraine; UMR 7360 Campus Bridoux rue du Général Delestraint 57070 Metz France
- LIEC; CNRS; UMR 7360 57070 Metz France
| | - Christophe Pagnout
- Laboratoire Interdisciplinaire des Environnements Continentaux (LIEC); Université de Lorraine; UMR 7360 Campus Bridoux rue du Général Delestraint 57070 Metz France
- LIEC; CNRS; UMR 7360 57070 Metz France
| |
Collapse
|
22
|
Batista D, Pascoal C, Cássio F. Impacts of warming on aquatic decomposers along a gradient of cadmium stress. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2012; 169:35-41. [PMID: 22683478 DOI: 10.1016/j.envpol.2012.05.021] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/08/2012] [Revised: 05/09/2012] [Accepted: 05/13/2012] [Indexed: 06/01/2023]
Abstract
We evaluated the effects of cadmium and temperature on plant-litter decomposition by examining diversity and activity of aquatic fungi and leaf consumption by Limnephilus sp., a typical invertebrate shredder of Iberian streams. Freshly fallen leaves were immersed in a stream to allow microbial colonization, and were exposed in microcosms to a gradient of cadmium (≤11 levels, ≤35 mg L(-1)). Microcosms were kept at 15 °C, a temperature typically found in Iberian streams in autumn, and at 21 °C to simulate a warming scenario. The increase in temperature stimulated leaf decomposition by microbes, fungal reproduction and leaf consumption by the shredder. Conversely, increased cadmium concentrations inhibited fungal reproduction and diversity, and leaf consumption by the invertebrate. Cadmium concentration inhibiting 50% of fungal reproduction, microbial decomposition and leaf consumption by the shredder was higher at 15 °C than at 21 °C, suggesting that higher temperatures can lead to increased metal toxicity to aquatic decomposers.
Collapse
Affiliation(s)
- D Batista
- Centre of Molecular and Environmental Biology (CBMA), Department of Biology, University of Minho, Campus de Gualtar, Braga, Portugal
| | | | | |
Collapse
|
23
|
Proia L, Cassió F, Pascoal C, Tlili A, Romaní AM. The Use of Attached Microbial Communities to Assess Ecological Risks of Pollutants in River Ecosystems: The Role of Heterotrophs. THE HANDBOOK OF ENVIRONMENTAL CHEMISTRY 2012. [DOI: 10.1007/978-3-642-25722-3_3] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
|
24
|
Krauss GJ, Solé M, Krauss G, Schlosser D, Wesenberg D, Bärlocher F. Fungi in freshwaters: ecology, physiology and biochemical potential. FEMS Microbiol Rev 2011; 35:620-51. [DOI: 10.1111/j.1574-6976.2011.00266.x] [Citation(s) in RCA: 204] [Impact Index Per Article: 15.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023] Open
|