Diversity of kelp holdfast-associated fauna in an Arctic fjord - inconsistent responses to glacial mineral sedimentation across different taxa

2018 ◽  
Vol 205 ◽  
pp. 100-109 ◽  
Author(s):  
Marta Ronowicz ◽  
Piotr Kukliński ◽  
Maria Włodarska-Kowalczuk
Keyword(s):  
Associated Fauna ◽  
Arctic Fjord ◽  
Kelp Holdfast

Anthropogenic particles in sediment from an Arctic fjord

2021 ◽  
Vol 772 ◽  
pp. 145575
Author(s):  
France Collard ◽  
Katrine Husum ◽  
Gauthier Eppe ◽  
Cédric Malherbe ◽  
Ingeborg G. Hallanger ◽  
...  
Keyword(s):  
Arctic Fjord

scholarly journals Comparison of zooplankton vertical migration in an ice-free and a seasonally ice-covered Arctic fjord: An insight into the influence of sea ice cover on zooplankton behavior

2010 ◽  
Vol 55 (2) ◽  
pp. 831-845 ◽  
Author(s):  
Margaret I. Wallace ◽  
Finlo R. Cottier ◽  
Jørgen Berge ◽  
Geraint A. Tarling ◽  
Colin Griffiths ◽  
...  
Keyword(s):  
Sea Ice ◽  
Vertical Migration ◽  
Ice Cover ◽  
Arctic Fjord ◽  
Insight Into

scholarly journals Relatively high antibiotic resistance among heterotrophic bacteria from arctic fjord sediments than water – Evidence towards better selection pressure in the fjord sediments

Polar Science ◽  
2015 ◽  
Vol 9 (4) ◽  
pp. 382-388 ◽  
Author(s):  
A.A. Mohamed Hatha ◽  
C.S. Neethu ◽  
S.M. Nikhil ◽  
K.M. Mujeeb Rahiman ◽  
K.P. Krishnan ◽  
...  
Keyword(s):  
Antibiotic Resistance ◽  
Selection Pressure ◽  
Heterotrophic Bacteria ◽  
Arctic Fjord ◽  
Fjord Sediments

scholarly journals Soft bottom macrofauna of an All Taxa Biodiversity Site: Hornsund (77○N, Svalbard)

2010 ◽  
Vol 31 (4) ◽  
pp. 309-326 ◽  
Author(s):  
Monika Kędra ◽  
Sławomira Gromisz ◽  
Radomir Jaskuła ◽  
Joanna Legeżyńska ◽  
Barbara Maciejewska ◽  
...  
Keyword(s):  
Bottom Fauna ◽  
Sampling Effort ◽  
Biological Traits ◽  
Depth Range ◽  
Concerted Action ◽  
Soft Bottom ◽  
Species List ◽  
Biodiversity Inventory ◽  
Arctic Fjord ◽  
Large Material

Soft bottom macrofauna of an All Taxa Biodiversity Site: Hornsund (77○N, Svalbard) Hornsund, an Arctic fjord in the west coast of Spitsbergen (Svalbard), was selected as All Taxa Biodiversity Inventory (ATBI) site under EU 5th Framework Concerted Action BIOMARE (2000-2002), especially due to its pristine, undisturbed natural character. On the base of large material (89 stations located throughout the fjord and 129 Van Veen grab samples) collected during cruises of RV Oceania in July in 2002, 2003, 2005 and 2007 and literature search a comprehensive list of species recorded within Hornsund area, on the soft bottom with depth range of 30-250 m is provided. Over 220 species were identified including 93 species of Polychaeta, 62 species of Mollusca and 58 species of Crustacea. Species list is supported by information on the zoogeographical status, body length and biological traits of dominant species. Need for further research on Hornsund soft bottom fauna with more sampling effort is highlighted.

The biology of two species of Engaeus (Decapoda : Parastacidae) in Tasmania. III. Habitat, food, associated fauna and distribution

1977 ◽  
Vol 28 (1) ◽  
pp. 95 ◽  
Author(s):  
PJ Suter ◽  
AMM Richardson
Keyword(s):  
Dissolved Oxygen ◽  
Geographical Distribution ◽  
Water Table ◽  
Freshwater Crayfish ◽  
Associated Fauna ◽  
Water Table Level ◽  
Burrow Structure ◽  
Study Sites ◽  
North Western ◽  
Temperature Water

The habitats of two apparently sympatric freshwater crayfish, Engaeus cisternarius and E. fossor, in north-western Tasmania were compared. At two study sites data on rainfall, temperature, water table level, dissolved oxygen and pH were collected. E. fossor occupies regions below the water table, whilst E. cisternarius occupies drier areas above the water table. The burrow structure, burrow fauna, ectofauna and food were compared. The geographical distribution of each species is discussed.

scholarly journals Mesozooplankton community development at elevated CO<sub>2</sub> concentrations: results from a mesocosm experiment in an Arctic fjord

2013 ◽  
Vol 10 (3) ◽  
pp. 1391-1406 ◽  
Author(s):  
B. Niehoff ◽  
T. Schmithüsen ◽  
N. Knüppel ◽  
M. Daase ◽  
J. Czerny ◽  
...  
Keyword(s):  
Fossil Fuels ◽  
Cold Water ◽  
World Ocean ◽  
Mesh Size ◽  
Co2 Concentration ◽  
Taxonomic Composition ◽  
Marine Biota ◽  
Mesozooplankton Community ◽  
Oithona Similis ◽  
Arctic Fjord

Abstract. The increasing CO2 concentration in the atmosphere caused by burning fossil fuels leads to increasing pCO2 and decreasing pH in the world ocean. These changes may have severe consequences for marine biota, especially in cold-water ecosystems due to higher solubility of CO2. However, studies on the response of mesozooplankton communities to elevated CO2 are still lacking. In order to test whether abundance and taxonomic composition change with pCO2, we have sampled nine mesocosms, which were deployed in Kongsfjorden, an Arctic fjord at Svalbard, and were adjusted to eight CO2 concentrations, initially ranging from 185 μatm to 1420 μatm. Vertical net hauls were taken weekly over about one month with an Apstein net (55 μm mesh size) in all mesocosms and the surrounding fjord. In addition, sediment trap samples, taken every second day in the mesocosms, were analysed to account for losses due to vertical migration and mortality. The taxonomic analysis revealed that meroplanktonic larvae (Cirripedia, Polychaeta, Bivalvia, Gastropoda, and Decapoda) dominated in the mesocosms while copepods (Calanus spp., Oithona similis, Acartia longiremis and Microsetella norvegica) were found in lower abundances. In the fjord copepods prevailed for most of our study. With time, abundance and taxonomic composition developed similarly in all mesocosms and the pCO2 had no significant effect on the overall community structure. Also, we did not find significant relationships between the pCO2 level and the abundance of single taxa. Changes in heterogeneous communities are, however, difficult to detect, and the exposure to elevated pCO2 was relatively short. We therefore suggest that future mesocosm experiments should be run for longer periods.

scholarly journals Galls of Cecidoses eremita Curtis and Eucecidoses minutanus Brèthes (Lepidoptera: Cecidosidae) in Magdalena, Buenos Aires Province: preliminary study and associated fauna

2016 ◽  
Vol 16 (4) ◽  
Author(s):  
Veronica Loetti ◽  
Alejandra Valverde ◽  
Diana Nora Rubel
Keyword(s):  
Wall Thickness ◽  
Buenos Aires ◽  
Maximum Diameter ◽  
Buenos Aires Province ◽  
Associated Fauna ◽  
The Family ◽  
Preliminary Study

Abstract In Argentina, five galling species of the family Cecidosidae (Lepidoptera), including Cecidoses eremita Curtis and Eucecidoses minutanus Brèthes, have been cited. This note reports a preliminary study of their galls in "molles" (Schinus longifolius (Lindl.) Speg.) of Magdalena (Buenos Aires, Argentina). In April 2013, galls of C. eremita and E. minutanus were censused in randomly selected "molles". In April and December 2013, randomly selected galls were then collected and transported to our laboratory in hermetic bags, and conserved at -18 ºC until examination. Maximum diameter and wall thickness of collected galls were measured. About 84% of the observed "molles" (103/123) had galls of C. eremita and/or E. minutanus. The median of galls per tree was 12 (Q1=6; Q3=22). Eucecidoses minutanus had galls with smaller diameter (U11;53= 583; P<0.05) and thinner wall (U10;52=506.5; P<0..05) than C. eremita. In open galls, we found Pseudoescorpionida, Araneae (Segestriidae and Salticidae), and larvae of Lepidoptera and Hymenoptera. Within closed galls, we found adults of Torymidae and Chalcidoidea, and larvae of Ichneumonoidea.

scholarly journals Geochronology and physical context of Oldowan site formation at Kanjera South, Kenya

2018 ◽  
Vol 156 (07) ◽  
pp. 1190-1200 ◽  
Author(s):  
P. W. DITCHFIELD ◽  
E. WHITFIELD ◽  
T. VINCENT ◽  
T. PLUMMER ◽  
D. BRAUN ◽  
...  
Keyword(s):  
Depositional Environment ◽  
Fine Fraction ◽  
Lacustrine Sediments ◽  
Site Formation ◽  
Lake Basin ◽  
Limited Evidence ◽  
Associated Fauna ◽  
Physical Context ◽  
Granulometric Analysis ◽  
Kanjera South

AbstractOldowan sites in primary geological context are rare in the archaeological record. Here we describe the depositional environment of Oldowan occurrences at Kanjera South, Kenya, based on field descriptions and granulometric analysis. Excavations have recovered a large Oldowan artefact sample as well as the oldest substantial sample of archaeological fauna. The deposits at Kanjera South consist of 30 m of fluvial, colluvial and lacustrine sediments. Magneto- and biostratigraphy indicate the Kanjera South Member of the Kanjera Formation was deposited during 2.3–1.92 Ma, with 2.0 Ma being a likely age for the archaeological occurrences. Oldowan artefacts and associated fauna were deposited in the colluvial and alluvial silts and sands of beds KS1–3, in the margins of a lake basin. Field descriptions and granulometric analysis of the sediment fine fraction indicate that sediments from within the main archaeological horizon were emplaced as a combination of tractional and hyperconcentrated flows with limited evidence of debris-flow deposition. This style of deposition is unlikely to significantly erode or disturb the underlying surface, and therefore promotes preservation of surface archaeological accumulations. Hominins were repeatedly attracted to the site locale, and rapid sedimentation, minimal bone weathering and an absence of bone or artefact rounding further indicate that fossils and artefacts were quickly buried.

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