The invasive land flatworm Obama nungara (Platyhelminthes: Geoplanidae) reaches a natural environment in the oceanic island of São Miguel (Açores)

Zootaxa ◽  
2020 ◽  
Vol 4830 (1) ◽  
pp. 197-200
Author(s):  
DOMINGO LAGO-BARCIA ◽  
JOSÉ RAFAEL GONZÁLEZ-LÓPEZ ◽  
FERNANDO ÁNGEL FERNÁNDEZ-ÁLVAREZ
Keyword(s):  
Great Britain ◽  
Natural Environment ◽  
Ventral Surface ◽  
Oceanic Island ◽  
External Morphology ◽  
Broad Leaf ◽  
Parallel Body ◽  
Sampling Trip

During an entomological sampling trip in the island of São Miguel (Açores, Portugal) on 02-11-2019 by José Rafael González-López, one specimen of the invasive flatworm Obama nungara Carbayo et al. 2016 was found under a rock (Fig. 1A). The specimen was photographed in situ and identified by its external morphology based on its large and broad leaf-like body with nearly parallel body margins, narrow and rounded anterior end, rounded posterior end, and dorsal pigmentation consisting of a light brown ground color covered with dark longitudinal and irregular stripes, and ventral surface grayish-white. Recent studies (Justine et al. 2020; Negrete et al. 2020) showed the reliability of photograph-based identification of O. nungara specimens. It is the sixth island where this species has been found (after Guernsey, Great Britain, Ireland, Corsica, and Madeira). 

scholarly journals In-Situ Synthesis of TiO2@GO Nanosheets for Polymers Degradation in a Natural Environment

Polymers ◽  
2021 ◽  
Vol 13 (13) ◽  
pp. 2158
Author(s):  
Yueqin Shi ◽  
Zhanyang Yu ◽  
Zhengjun Li ◽  
Xiaodong Zhao ◽  
Yongjun Yuan
Keyword(s):  
Natural Environment ◽  
New Technologies ◽  
Separation Efficiency ◽  
Basic Mechanism ◽  
Chemical Degradation ◽  
Natural Environments ◽  
Additional Energy ◽  
Photogenerated Electrons ◽  
Main Components

Plastic photodegradation naturally takes 300–500 years, and their chemical degradation typically needs additional energy or causes secondary pollution. The main components of global plastic are polymers. Hence, new technologies are urgently required for the effective decomposition of the polymers in natural environments, which lays the foundation for this study on future plastic degradation. This study synthesizes the in-situ growth of TiO2 at graphene oxide (GO) matrix to form the TiO2@GO photocatalyst, and studies its application in conjugated polymers’ photodegradation. The photodegradation process could be probed by UV-vis absorption originating from the conjugated backbone of polymers. We have found that the complete decomposition of various polymers in a natural environment by employing the photocatalyst TiO2@GO within 12 days. It is obvious that the TiO2@GO shows a higher photocatalyst activity than the TiO2, due to the higher crystallinity morphology and smaller size of TiO2, and the faster transmission of photogenerated electrons from TiO2 to GO. The stronger fluorescence (FL) intensity of TiO2@GO compared to TiO2 at the terephthalic acid aqueous solution indicates that more hydroxyl radicals (•OH) are produced for TiO2@GO. This further confirms that the GO could effectively decrease the generation of recombination centers, enhance the separation efficiency of photoinduced electrons and holes, and increase the photocatalytic activity of TiO2@GO. This work establishes the underlying basic mechanism of polymers photodegradation, which might open new avenues for simultaneously addressing the white pollution crisis in a natural environment.

scholarly journals Two new species of megasporangiate <i>Sigillariostrobus</i> Schimper (Sigillariostrobaceae) fructifications from the British Coal Measures

Fossil Record ◽  
2015 ◽  
Vol 19 (1) ◽  
pp. 1-9 ◽  
Author(s):  
B. A. Thomas ◽  
L. J. Seyfullah
Keyword(s):  
New Species ◽  
Great Britain ◽  
In Situ Spores ◽  
Two New Species ◽  
Coal Measures

Abstract. The arborescent lycophyte group known as the sigillarians bore pedunculate fructifications, including Sigillariostrobus Schimper, which has a known propensity to disaggregate, making comparisons of cones and in situ spores often difficult if not impossible. Sigillariostrobus is monosporangiate, containing either megaspores or microspores. Two new species of Sigillariostrobus with megaspores are described from the British Coal Measures. Two cones of Sigillariostrobus saltwellensis sp. nov. are described from Langsettian–Duckmantian strata of Great Britain, containing in situ Laevigatisporites glabratus (Zerndt) Potonié and Kremp spores, making this the first British Sigillariostrobus species described containing such spores. Sigillariostrobus barkeri sp. nov. is given here to the previously described cone with in situ Tuberculatisporites brevispiculus (Schopf) Potonié and Kremp spores. This is the first Sigillariostrobus cone with this megaspore species in situ, and thus shows that T. brevispiculus and T. mamillarius (Bartlett) Potonié and Kremp are not conspecific as others have previously suggested.

The composition and distribution of nodular monazite in the Lower Palaeozoic rocks of Great Britain

1987 ◽  
Vol 51 (360) ◽  
pp. 271-280 ◽  
Author(s):  
D. Read ◽  
D. C. Cooper ◽  
J. M. McArthur
Keyword(s):  
Great Britain ◽  
Host Rock ◽  
Sedimentary Rock ◽  
Sedimentary Rocks ◽  
Source Rocks ◽  
Low Grade ◽  
South West ◽  
Lower Palaeozoic ◽  
South West England

AbstractMillimetric, ellipsoidal monazite nodules found within Lower Palaeozoic sedimentary rocks in Wales, south-west England and Brittany are characterised by a pronounced zonation of light and heavy REE, an inclusion fabric of low-grade metamorphic minerals indistinguishable from the host rock and a low Th content. They are interpreted as the product of in situ recrystallization of detrital monazites derived from pegmatitic or granitic source rocks and are potentially useful as indicators of Lower Palaeozoic sedimentary rock provenance.

Application of in-situ digital holography in the study of particles, organisms and bubbles within their natural environment

2012 ◽  
Author(s):  
Siddharth Talapatra ◽  
James Sullivan ◽  
Joseph Katz ◽  
Michael Twardowski ◽  
Helen Czerski ◽  
...  
Keyword(s):  
Natural Environment ◽  
Digital Holography

The plant Leclercqia (Lycopsida) in Gondwana: implications for reconstructing Middle Devonian palaeogeography

2003 ◽  
Vol 140 (2) ◽  
pp. 119-130 ◽  
Author(s):  
BRIGITTE MEYER-BERTHAUD ◽  
MURIEL FAIRON-DEMARET ◽  
PHILIPPE STEEMANS ◽  
JOHN TALENT ◽  
PHILIPPE GERRIENNE
Keyword(s):  
Middle Devonian ◽  
Distribution Patterns ◽  
Biological Data ◽  
External Morphology ◽  
Taxonomic Identification ◽  
Wide Range ◽  
Close Proximity

Abundant and well-preserved material of the ligulate lycopsid genus Leclercqia is reported from a new Middle Devonian locality in northeastern Queensland (Australia). The plants occur in a chert horizon in the Storm Hill Sandstone of the Dosey-Craigie Platform. Lithological data and conodont analyses combined with information from in situ spores provide an age for the plant levels ranging from Eifelian, possibly Middle Eifelian, to Early Givetian. Plant taxonomic identification is based on vegetative and fertile stems that display both external morphology and anatomy. This material represents the best documented occurrence of Leclercqia outside Laurussia and possibly the earliest in Gondwana; it provides evidence that colonization of Gondwana by the species L. complexa was contemporaneous to that of Siberia and Kazakhstan. Analysis of the distribution patterns of L. complexa suggests that it was adapted to a wide range of environments, but within certain limits which we hypothesize to be those of a climatic belt. Such considerations support previous studies using other biological data, such as faunas and palynomorphs, for reconstructing Devonian palaeogeography. They favour a close proximity of Laurussia and Gondwana rather than the occurrence of a wide ocean separating the two palaeocontinents in Middle Devonian times.

scholarly journals In situ sampling and speciation method for measuring dissolved phosphite at ultratrace concentrations in the natural environment

2018 ◽  
Vol 137 ◽  
pp. 281-289 ◽  
Author(s):  
Chao Han ◽  
Paul N. Williams ◽  
Jinghua Ren ◽  
Zhaode Wang ◽  
Xu Fang ◽  
...  
Keyword(s):  
Natural Environment

Étude expérimentale in situ des effets de la densité et de la quantité de nourriture chez le gastéropode Bithynia tentaculata (Mollusca: Prosobranchia)

1986 ◽  
Vol 64 (8) ◽  
pp. 1696-1700 ◽  
Author(s):  
Eric Gilbert ◽  
Bruno Vincent ◽  
Luc Roseberry
Keyword(s):  
Natural Environment ◽  
Adult Mortality ◽  
Adult Density ◽  
Initial Value ◽  
Bithynia Tentaculata ◽  
Two Factors ◽  
The Mean ◽  
New Generation ◽  
St Lawrence River

Experiments in a natural environment on the Gastropod Bithynia tentaculata showed that adult density and available food have significant effects on the growth of smaller adults and newborns. Mean length of the new generation at the end of the experiment incresed as adult densities decreased from the initial value and as food abundance increased. The only case of interaction between these two factors can be explained by an increase in the number of young brought about by the addition of food when density was low and by the influence of the density of these young on their growth. Different combinations of density and food can produce the various types of length–frequency histograms observed in a natural environment and during the past 8 years in the St. Lawrence River. There was no significant correlation between these two factors and the adult mortality rate, but density did have a significant effect on the mean number of young per adult.[Journal translation]

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