scholarly journals Toxicokinetics of Ag (nano)materials in the soil model Enchytraeus crypticus (Oligochaeta) – impact of aging and concentration

2021 ◽  
Author(s):  
Fátima C. F. Santos ◽  
Paula S. Tourinho ◽  
Janeck J. Scott-Fordsmand ◽  
Cornelis A. M. van Gestel ◽  
Mónica J. B. Amorim
Keyword(s):  
Life Stage ◽  
Nano Materials ◽  
Soil Aging ◽  
Soil Model ◽  
Enchytraeus Crypticus

Silver (Ag) nanomaterials (NMs) are used in many products, reaching the environment at some life stage. Their impact assessed via toxicokinetics differed between Ag salt and nano forms and also with soil aging.

scholarly journals Epigenetic effects of (nano)materials in environmental species – Cu case study in Enchytraeus crypticus

2020 ◽  
Vol 136 ◽  
pp. 105447 ◽  
Author(s):  
Rita C. Bicho ◽  
Dick Roelofs ◽  
Janine Mariën ◽  
Janeck J. Scott-Fordsmand ◽  
Mónica J.B. Amorim
Keyword(s):  
Nano Materials ◽  
Epigenetic Effects ◽  
Enchytraeus Crypticus

scholarly journals Toxicokinetics of copper and cadmium in the soil model Enchytraeus crypticus (Oligochaeta)

Chemosphere ◽  
2021 ◽  
Vol 270 ◽  
pp. 129433
Author(s):  
Fátima C.F. Santos ◽  
Cornelis A.M. van Gestel ◽  
Mónica J.B. Amorim
Keyword(s):  
Soil Model ◽  
Enchytraeus Crypticus

Silver (nano)materials cause genotoxicity in Enchytraeus crypticus , as determined by the comet assay

2017 ◽  
Vol 37 (1) ◽  
pp. 184-191 ◽  
Author(s):  
Vera L. Maria ◽  
Maria João Ribeiro ◽  
Sofia Guilherme ◽  
Amadeu M.V.M. Soares ◽  
Janeck J. Scott‐Fordsmand ◽  
...  
Keyword(s):  
Comet Assay ◽  
Nano Materials ◽  
Enchytraeus Crypticus

scholarly journals Multigenerational Exposure to WCCo Nanomaterials—Epigenetics in the Soil Invertebrate Enchytraeus crypticus

Nanomaterials ◽  
2020 ◽  
Vol 10 (5) ◽  
pp. 836
Author(s):  
Rita C. Bicho ◽  
Janeck J. Scott-Fordsmand ◽  
Mónica J.B. Amorim
Keyword(s):  
Dna Methylation ◽  
Current Evidence ◽  
Soil Invertebrate ◽  
Global Dna Methylation ◽  
Nano Materials ◽  
Phenotypic Effect ◽  
Spiked Soil ◽  
Enchytraeus Crypticus ◽  
Two Generations ◽  
Nanostructured Tungsten Carbide

It has become clear how important it is to assess longer term effects of (nano) materials in the environment given the current evidence showing how epigenetics drives response mechanisms. Here we studied global DNA methylation in standard soil invertebrate Enchytraeus crypticus over 224 days when exposed to nanostructured tungsten carbide cobalt (WCCo nanomaterials (NMs)) and to cobalt (CoCl2) in a multigenerational experiment. In order to assess the transgenerational effect, we used a multigenerational (MG) test design consisting of four generations in spiked soil followed by two generations in clean soil. Results showed that MG exposure to WCCo NMs caused global DNA methylation to increase, which continued in unexposed generations and was associated with an increase in reproduction (phenotypic effect). In general, WCCo NMs caused more (and more consistent) methylation than CoCl2.

Effects of copper oxide nanomaterials (CuONMs) are life stage dependent – full life cycle in Enchytraeus crypticus

2017 ◽  
Vol 224 ◽  
pp. 117-124 ◽  
Author(s):  
Rita C. Bicho ◽  
Fátima C.F. Santos ◽  
Janeck J. Scott-Fordsmand ◽  
Mónica J.B. Amorim
Keyword(s):  
Life Cycle ◽  
Copper Oxide ◽  
Life Stage ◽  
Full Life Cycle ◽  
Enchytraeus Crypticus ◽  
Full Life

Habitat fragmentation causes collapse of kelp recruitment

2020 ◽  
Vol 648 ◽  
pp. 111-123
Author(s):  
C Layton ◽  
MJ Cameron ◽  
M Tatsumi ◽  
V Shelamoff ◽  
JT Wright ◽  
...  
Keyword(s):  
Habitat Fragmentation ◽  
Patch Size ◽  
Life Stage ◽  
Extended Period ◽  
Anthropogenic Disturbances ◽  
Anthropogenic Sources ◽  
Kelp Forests ◽  
Natural Disturbances ◽  
Short Term ◽  
Turf Algae

Kelp forests in many regions are experiencing disturbance from anthropogenic sources such as ocean warming, pollution, and overgrazing. Unlike natural disturbances such as storms, anthropogenic disturbances often manifest as press perturbations that cause persistent alterations to the environment. One consequence is that some kelp forests are becoming increasingly sparse and fragmented. We manipulated patch size of the kelp Ecklonia radiata over 24 mo to simulate persistent habitat fragmentation and assessed how this influenced the demography of macro- and microscopic juvenile kelp within the patches. At the beginning of the experiment, patch formation resulted in short-term increases in E. radiata recruitment in patches <1 m2. However, recruitment collapsed in those same patches over the extended period, with no recruits observed after 15 mo. Experimental transplants of microscopic and macroscopic juvenile sporophytes into the patches failed to identify the life stage impacted by the reductions in patch size, indicating that the effects may be subtle and require extended periods to manifest, and/or that another life stage is responsible. Abiotic measurements within the patches indicated that kelp were less able to engineer the sub-canopy environment in smaller patches. In particular, reduced shading of the sub-canopy in smaller patches was associated with proliferation of sediments and turf algae, which potentially contributed to the collapse of recruitment. We demonstrate the consequences of short- and longer-term degradation of E. radiata habitats and conclude that habitat fragmentation can lead to severe disruptions to kelp demography.

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