Results 81 to 90 of about 97,834 (254)

Bryozoan‐Rich Carbonate Units of the Erfoud Area (SE Morocco) Record Latest Katian to Early Hirnantian Interglacial Intervals

open access: yesGeological Journal, EarlyView.
In this study, we re‐examine the depositional architecture of the Erfoud limestone in Morocco. Introducing new biostratigraphic constraints from chitinozoan assemblages, we show that Katian to Hirnantian bryozoan‐pelmatozoan meadows reflect flooding events linked to a series of interglacial transgressions known to have occurred immediately prior to the
Philippe Razin   +4 more
wiley   +1 more source

Shells of New England: A Revision of the Synonomymy of the Testaceous Mollusks of New England

open access: yes
SHELLS OF NEW ENGLAND: A REVISION OF THE SYNONOMYMY OF THE TESTACEOUS MOLLUSKS OF NEW ENGLAND Johannes Müller Library (-) Shells of New England: A Revision of the Synonomymy of the Testaceous Mollusks of New England (-
Stimpson, William
core   +2 more sources

Nanoplastics: Methods, Exposure and Effects on Domestic, Farm and Wild Animals

open access: yesJournal of Applied Toxicology, EarlyView.
ABSTRACT Nanoplastics (NPs) are synthetic polymer particles ranging in size from 1 nm to 1 μm that have been identified as a major concern for ecosystems and organisms due to their plethora of negative effects. The aim of this review is to provide a comprehensive overview of the knowledge relating to exposure and effects of NPs in domestic (i.e., farm ...
B. De Felice   +8 more
wiley   +1 more source

The Minimal Nonplanar Strong Digraphs

open access: yesJournal of Graph Theory, EarlyView.
ABSTRACT Kuratowski's theorem says that the minimal (under subgraph containment) graphs that are not planar are the subdivisions of K 5 ${K}_{5}$ and of K 3 , 3 ${K}_{3,3}$. Here we study the minimal (under subdigraph containment) strongly‐connected digraphs that are not planar.
Stephen Bartell, Paul Seymour
wiley   +1 more source

Stable isotope analysis of freshwater gastropod carbonates from Swanscombe: Insights into climate stability and seasonality during MIS 11c

open access: yesJournal of Quaternary Science, EarlyView.
ABSTRACT Stable isotope analyses of freshwater mollusc carbonate can record environmental conditions at the time of mineralisation, yet this technique remains underused in British Middle Pleistocene fluvial sequences, despite the abundance of fossil shell material in these deposits.
Jennifer E. Sherriff   +4 more
wiley   +1 more source

Metabolitos secundarios, letalidad y actividad antimicrobiana de los extractos de tres corales y tres moluscos marinos de Sucre, Venezuela

open access: yesRevista de Biología Tropical, 2010
A los extractos crudos de los octocorales Eunicea sp., Muricea sp. y Pseudopterogorgia acerosa y de los moluscos Pteria colymbus, Phylonotus pomum y Chicoreus brevifrons, se les realizaron pruebas químicas, las cuales evidenciaron en todos ellos, la ...
Gabriel Ordaz   +4 more
doaj  

Annual dynamics of trematode parthenite hemipopulations associated with the Black Sea mollusks Hydrobia acuta [PDF]

open access: yes, 2022
First data of seasonal dynamics of daughter sporocysts hemipopulations associated with the Black Sea mollusks Hydrobia acuta are presented.
Белоусова, Ю. В.   +1 more
core  

Climate‐modulated accumulation and erosion of sediments in the Rodderberg crater basin for the last 439 ka (East Eifel Volcanic Field, Germany)

open access: yesJournal of Quaternary Science, EarlyView.
ABSTRACT Glacial/interglacial climate cycles since marine isotope stage (MIS) 12 influenced the discontinuous and 73 m‐long sediment record from the volcanic crater of Rodderberg in the East Eifel Volcanic Field, Germany. High‐resolution grain size and geochemical data have been valued by numerical dating techniques (radiocarbon and luminescence dating,
Bernd Zolitschka   +4 more
wiley   +1 more source

Moluscos asociados a las raíces sumergidas del mangle rojo Rhizophora mangle, en el Golfo de Santa Fe, Estado Sucre, Venezuela

open access: yesRevista de Biología Tropical, 2002
Se realizó un estudio mensual cualitativo y cuantitativo de la comunidad de moluscos asociados a las raíces sumergidas del mangle rojo, Rhizophora mangle, entre octubre de 1998 y septiembre de 1999, en seis estaciones del Golfo de Santa Fe (Estado Sucre,
B. Márquez, M. Jiménez
doaj  

Mollusks in Soft Coral Community in Kagoshima Prefecture [PDF]

open access: yes, 2006
鹿児島県に分布するソフトコーラルに観察される貝類について調査を行った。その結果、主にウミウサギカイ科の貝類が多く見られた。貝類は主にソフトコーラルを餌、産卵場所、避難場所として利用していると考えられる。Research was conducted to study ecology of mollusks inhabited in soft coral community in Kagoshima prefecture. Mollusks in Ovulidae were mainly observed.
河合, 渓   +9 more
core   +1 more source

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