Results 71 to 80 of about 77,745 (218)

Complete mitochondrial genomes of two scaphopod molluscs

open access: yesMitochondrial DNA. Part B. Resources, 2019
Complete mitochondrial genomes were determined for two scaphopod molluscs: the dentaliid Antalis entalis and an unidentified Antarctic gadilid. Both genomes are complete except, in Gadilida sp.
Kevin M. Kocot   +5 more
doaj   +1 more source

Floodplain environmental change during the younger dryas and holocene: Evidence from the lower kennet valley, south central England [PDF]

open access: yes, 2006
Many lowland rivers across northwest Europe exhibit broadly similar behavioural responses to glacial-interglacial transitions and landscape development. Difficulties exist in assessing these, largely because the evidence from many rivers remains limited
Collins, PEF   +3 more
core  

A new substrate for sampling deep river macroinvertebrates [PDF]

open access: yes, 2009
We compared macroinvertebrate communities colonising multiplate samplers constructed from perspex or tempered hardboard (wood) with an alternative artificial substrate constructed from folded coconut fibre matting (coir) enclosed in nylon netting ...
Chadderton, W. Lindsay   +2 more
core   +2 more sources

Taxonomic Deception via Obvious Traits: Oversplitting in European Vallonia Risso, 1826 (Mollusca: Gastropoda: Valloniidae)

open access: yesZoologica Scripta, Volume 55, Issue 1, Page 37-51, January 2026.
ABSTRACT The status of the six traditionally recognised European Vallonia taxa is considered based on mtDNA and nDNA sequences from five independently sorting loci in combination with morphometric landmark analyses conducted on genetically confirmed shells. These analyses document that only two species are valid (V. costata and V.
Jeffrey C. Nekola   +7 more
wiley   +1 more source

Mollusca of the Illinois River, Arkansas [PDF]

open access: yes, 1979
The Illinois River is in the Ozark region of northwestern Arkansas and eastern Oklahoma. A survey of the Illinois River in Arkansas produced nine species and one morphological subspecies of gastropods, three species of sphaeriid clams, and 23 species of ...
Brown, Arthur V.   +2 more
core   +2 more sources

Assessing the Relationship Between Macroinvertebrate Metrics and Fine Sediment Index for Ecological Biomonitoring in the Little Akaki River, Addis Ababa, Ethiopia

open access: yesEcology and Evolution, Volume 15, Issue 12, December 2025.
Habitat quality had a positive correlation with percentage of Ephemeroptera, percentage of EOT, and Shannon diversity index (r = 0.833, r = 0.880, and r = 0.939, respectively). PSI had positive correlation with number of taxa, and ASPT‐ETHbios (r = 0.819, and r = 0.798, respectively). Most sites were heavily sedimented.
Alachew Adino, Seyoum Mengistou
wiley   +1 more source

Biodiversity of macrozoobenthos in a large river, the Austrian Danube, including quantitative studies in a free-flowing stretch below Vienna: a short review [PDF]

open access: yes, 2005
The Danube is ca. 2850 km in length and is the second largest river in Europe. The Austrian part of the Danube falls 156 metres in altitude over its 351 km length and, since the early 1950s, the river has been developed into a power-generating waterway ...
Fesl, Christian, Humpesch, Uwe
core  

Evolution of microgastropods (Ellobioidea, Carychiidae): integrating taxonomic, phylogenetic and evolutionary hypotheses [PDF]

open access: yes, 2013
BACKGROUND: Current biodiversity patterns are considered largely the result of past climatic and tectonic changes. In an integrative approach, we combine taxonomic and phylogenetic hypotheses to analyze temporal and geographic diversification of epigean (
Adrienne Jochum   +6 more
core   +1 more source

Catchment Productivity Controls Local Species Richness of Hyporheic Invertebrate Communities in Tropical New Caledonia Streams

open access: yesEcology and Evolution, Volume 15, Issue 12, December 2025.
How does the local species richness (LSR) of stream invertebrate communities relate to the terrestrial productivity of the stream catchment? Using generalized linear models and variance partitioning, we quantified the independent and joint effects of local and catchment predictors on LSR of hyporheic invertebrate communities in New Caledonia streams ...
Samuel Mouron   +9 more
wiley   +1 more source

Middle and Late Pleistocene environmental history of the Marsworth area, south-central England [PDF]

open access: yes, 2014
To elucidate the Middle and Late Pleistocene environmental history of south-central England, we report the stratigraphy, sedimentology, palaeoecology and geochronology of some deposits near the foot of the Chiltern Hills scarp at Marsworth ...
Adamiec   +137 more
core   +2 more sources

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