CO2 generation by calcified invertebrates along rocky shores of Brittany, France

2013 ◽  
Vol 64 (2) ◽  
pp. 91 ◽  
Author(s):  
Christian Hily ◽  
Jacques Grall ◽  
Laurent Chauvaud ◽  
Morgane Lejart ◽  
Jacques Clavier
Keyword(s):  
Intertidal Zone ◽  
Rocky Shore ◽  
Regional Scale ◽  
Coastal Environment ◽  
Co2 Production ◽  
Rocky Shores ◽  
Atlantic Region ◽  
The North ◽  
Wide Range ◽  
North Eastern

Many autochthonous and alien macroinvertebrates of the intertidal zone are biocalcifiers, and the present study proposes a first assessment of their calcimass and their annual calcium carbonate (CaCO3) production at a regional scale, along 500 km of the coastline of Brittany, France, which represents a wide range of the rocky-shore habitats commonly encountered in the north-eastern Atlantic region. All sites considered together gave a mean calcimass estimate of 5327 g m–2. The corresponding mean CaCO3 gross production was 2584 g m–2 year–1. The net production (including dissolution) by biocalcification was 2384 g CaCO3 m–2 year–1. Estimations of CO2 production via both calcification and respiration were carried out in particular for the phylum Mollusca and for crustacean barnacles, dominating in terms of calcimass. Mean CO2 production obtained by summing CO2 fluxes related to net CaCO3 production and respiration for all sampled sites was 22.9 mol m–2 year–1. These results illustrate the significance of CO2 production during biogenic CaCO3 precipitation of intertidal invertebrates in such temperate coastal environment compared with tropical zones and the contribution of the shelves to the global CaCO3 budget.

The Intertidal Zone of the North-East Atlantic Region

2019 ◽  
pp. 7-46
Author(s):  
Stephen J. Hawkins ◽  
Kathryn E. Pack ◽  
Louise B. Firth ◽  
Nova Mieszkowska ◽  
Ally J. Evans ◽  
...  
Keyword(s):  
Intertidal Zone ◽  
East Atlantic ◽  
Atlantic Region ◽  
North East ◽  
The North

Uncovering the Canning Basin: a new comprehensive SEEBASE® model

2018 ◽  
Vol 58 (2) ◽  
pp. 793
Author(s):  
Karen Connors ◽  
Cedric Jorand ◽  
Peter Haines ◽  
Yijie Zhan ◽  
Lynn Pryer
Keyword(s):  
Western Australia ◽  
Potential Field ◽  
Field Data ◽  
Regional Scale ◽  
Structural Evolution ◽  
Potential Field Data ◽  
Canning Basin ◽  
The North ◽  
Wide Range ◽  
Order Of Magnitude

A new regional scale SEEBASE® model has been produced for the intracratonic Canning Basin, located in the north of Western Australia. The 2017 Canning Basin SEEBASE model is more than an order of magnitude higher resolution than the 2005 OZ SEEBASE version — the average resolution is ~1 : 1 M scale with higher resolution in areas of shallow basement with 2D seismic coverage — such as the Broome Platform and Barbwire Terrace. Post-2005 acquisition of potential field, seismic and well data in the Canning Basin by the Geological Survey of Western Australia (GSWA), Geoscience Australia and industry provided an excellent opportunity to upgrade the SEEBASE depth-to-basement model in 2017. The SEEBASE methodology focuses on a regional understanding of basement, using potential field data to interpret basement terranes, depth-to-basement (SEEBASE), regional structural geology and basement composition. The project involved extensive potential field processing and enhancement and compilation of a wide range of datasets. Integrated interpretation of the potential field data with seismic and well analysis has proven quite powerful and illustrates the strong basement control on the extent and location of basin elements. The project has reassessed the structural evolution of the basin, identified and mapped major structures and produced fault-event maps for key tectonic events. In addition, interpretative maps of basement terranes, depth-to-Moho, basement thickness, basement composition and total sediment thickness have been used to calculate a basin-wide map of basement-derived heat flow. The 2017 Canning Basin SEEBASE is the first public update of the widely used 2005 OZ SEEBASE. All the data and interpretations are available from the GSWA as a report and integrated ArcGIS project, which together provide an excellent summary of the key features within the Canning Basin that will aid hydrocarbon and mineral explorers in the region.

Illustrated Key to Ampelisca Species from the North-Eastern Atlantic

1988 ◽  
Vol 68 (4) ◽  
pp. 659-676 ◽  
Author(s):  
Jean-Claude Dauvin ◽  
Denise Bellan-Santini
Keyword(s):  
New Species ◽  
Continental Shelf ◽  
Mediterranean Sea ◽  
Intertidal Zone ◽  
Atlantic Coast ◽  
The North ◽  
North Eastern ◽  
The Mediterranean

The genus Ampelisca comprises more than 150 species and is one of the more important benthic genus of marine amphipods. New species are regularly added (Barnard & Agard 1986; Bellan-Santini & Marques, 1986; Goeke, 1987). Ampelisca are found from the intertidal zone to abyssal depths but most of them live on the continental shelf. In spite of many studies, it is often difficult to distinguish some species which are morphologically similar. In the last ten years, twenty-two species have been described from the north-eastern Atlantic (BellanSantini & Kaïm-Malka, 1977; Bellan-Santini & Dauvin, 1981, 1986; Dauvin & Bellan-Santini, 1982, 1985; Bellan-Santini & Marques, 1986). Materials come from MNHN of Paris collection, collected by Chevreux (1894–1924) (Dauvin & Bellan-Santini, 1985, 1986) and specimens collected during the last 25 years. All these new species are described from the Atlantic coast from northern Brittany to the Sahara and from the Mediterranean Sea.

Phylogeographic Resolution of the Barnacle (Chelonibia testudinaria) from the North-Eastern Mediterranean Loggerhead Sea Turtles Epibiont Community

2020 ◽  
Vol 5 (1) ◽  
pp. 01-08
Author(s):  
Elif Beden ◽  
Arzu Karahan
Keyword(s):  
Age Estimation ◽  
Eastern Mediterranean ◽  
Coi Gene ◽  
Loggerhead Sea Turtles ◽  
Barnacle Species ◽  
The North ◽  
Wide Range ◽  
North Eastern ◽  
Mitochondrial Cytochrome Oxidase ◽  
Magdalena Bay

Barnacles are common epibionts on a wide range of marine organisms, including turtles. Chelonibia testudinaria is a successful epibiotic barnacle species, and mainly turtles are responsible for their wide range dispersal. In the present study, the mitochondrial Cytochrome Oxidase I (COI) gene haplotypes of C. testudinaria from Caretta caretta hosts were evaluated. The samples were collected from three dead C. caretta turtle carapaces in 2014 from the Middle East Technical University, Institute of Marine Sciences coastline. Results were also compared with those samples submitted to databases (NCBI and BOLD-system, 139 in total). By comparison, three clades were recorded like previous studies: the Atlantic-Mediterranean clade (Clade-α), the IndianPacific Ocean clade (Clade-β), and Magdalena Bay (Eastern Pacific- Clade-) clade; all samples collected from Turkish shores clustered in the Atlantic-Mediterranean group (Clade-α). The gene flow between the three clades was deficient and highly significant (0.02, 0.03, and 0.03, respectively). According to network age estimation, present study samples’ clade (Clade-α) diverged from the Clade-β approximately 200 kya (SDs=0.22, SDy=4402.90) and Clade- 130 kya (SDs=0.17, SDy=3494.55). In the present study, eight haplotypes were observed in total, two of which were specific to the region.

Seasonal forecast of agricultural impacts of droughts in Mexico through a principal component regression based approach

2020 ◽  
Author(s):  
Roberto Real-Rangel ◽  
Adrián Pedrozo-Acuña ◽  
Agustín Breña-Naranjo
Keyword(s):  
Soil Moisture ◽  
Regional Scale ◽  
Principal Component Regression ◽  
Principal Component ◽  
Drought Monitoring ◽  
Drought Forecasting ◽  
Moisture Index ◽  
The North ◽  
Wide Range ◽  
Monitoring And Forecasting

<p>Drought monitoring and forecasting allows to adopt mitigating actions in early stages of an event to reduce the vulnerability of a wide range of environmetal, economical and social sectors. In Mexico, various drought monitoring systems on national and regional scale perform a follow up of these events, such as the Drought Monitor in Mexico, and the North American Drought Monitor, but seasonal drought forecasting is still a pending task. This study aims at fill this gap applying a methodology that uses data derived from a globally available atmospheric reanalysis product and a principal component regression based model oriented to predict drought impacts in rainfed crops associated to deficits in the soil moisture, estimated by means of the standardized soil moisture index (SSI). Using the state of Guanajuato (Center-North of Mexico) as a study case, the model generated yielded RSME values of 0.74 using regional and global hydrological, climatic and atmospheric variables as predictors with a lead-time of 4 months.</p>

scholarly journals First-order estimate of the planktic foraminifer biomass in the modern global oceans

2012 ◽  
Vol 5 (1) ◽  
pp. 243-280
Author(s):  
R. Schiebel ◽  
A. Movellan
Keyword(s):  
Water Depth ◽  
Marine Ecosystem ◽  
Regional Scale ◽  
Global Scale ◽  
Order Estimate ◽  
Minimum Diameter ◽  
First Order ◽  
The North ◽  
Wide Range ◽  
Standing Stocks

Abstract. Planktic foraminifera are heterotrophic mesozooplankton of global marine abundance. The position of planktic foraminifers in the marine food web is different compared to other protozoans and ranges above the base of heterotrophic consumers. Being secondary producers with an omnivorous diet, which ranges from algae to small metazoans, planktic foraminifers are not limited to a single food source, and are assumed to occur at a balanced abundance displaying the overall marine biological productivity at a regional scale. We have calculated the assemblage carbon biomass from data on standing stocks between the sea surface and 2500 m water depth, based on 754 protein-biomass data of 21 planktic foraminifer species and morphotypes, produced with a newly developed method to analyze the protein biomass of single planktic foraminifer specimens. Samples include symbiont bearing and symbiont barren species, characteristic of surface and deep-water habitats. Conversion factors between individual protein-biomass and assemblage-biomass are calculated for test sizes between 72 and 845 μm (minimum diameter). The calculated assemblage biomass data presented here include 1057 sites and water depth intervals. Although the regional coverage of database is limited to the North Atlantic, Arabian Sea, Red Sea, and Caribbean, our data include a wide range of oligotrophic to eutrophic waters covering six orders of magnitude of assemblage biomass. A first order estimate of the global planktic foraminifer biomass from average standing stocks (>125 μm) ranges at 8.5–32.7 Tg C yr−1 (i.e. 0.008–0.033 Gt C yr−1), and might be more than three time as high including the entire fauna including neanic and juvenile individuals adding up to 25–100 Tg C yr−1. However, this is a first estimate of regional planktic-foraminifer assemblage-biomass (PFAB) extrapolated to the global scale, and future estimates based on larger data-sets might considerably deviate from the one presented here. This paper is supported by, and a contribution to the Marine Ecosystem Data project (MAREDAT). Data are available from www.pangaea.de (http://doi.pangaea.de/10.1594/PANGAEA.777386).

A Review of Institutional and Developmental Issues in North-East India

2020 ◽  
Vol 66 (2) ◽  
pp. 206-218
Author(s):  
Nicodim Basumatary ◽  
Bhagirathi Panda
Keyword(s):  
Rule Of Law ◽  
Institutional Factors ◽  
Eastern Region ◽  
Political Issues ◽  
Developmental Issues ◽  
North East India ◽  
North East ◽  
The North ◽  
Wide Range ◽  
North Eastern

Developmental issues of the North-Eastern States of India cannot be studied inisolation without accounting for the varied politico-socio-economic and institutional factors. This study covers a wide range of the socio-political issues and developmental gaps in the North-Eastern Region (NER) of India. It presents a broader picture and gives an understanding of the issues of governance and development prevailing in this region. Many issues pertain to paucity of developmental outcomes, ethnicity, demand for statehood, insurgency, absence of rule of law, corruption and so on, suggesting state’s ineffectiveness and people’s incompetence to take development to the front stage. An effort has also been made to trace the literature that deals with these issues.

scholarly journals Contribution to the knowledge of the butterfly fauna (Lepidoptera: Papilionoidea) of the north-eastern part of the Republic of Kosovo

2020 ◽  
Vol 89 (4 - Ahead of print) ◽  
pp. 181-189
Author(s):  
Ferdije Zhushi-Etemi ◽  
Valmir Visoka ◽  
Hazir Çadraku ◽  
Pajtim Bytyçi
Keyword(s):  
Regional Scale ◽  
Single Species ◽  
Point Of View ◽  
The North ◽  
Highly Sensitive ◽  
North Eastern ◽  
Butterfly Fauna ◽  
The Republic ◽  
State Of The Environment ◽  
Near Threatened

Butterflies are highly sensitive to habitat and climate changes, and are recognized as important indicators of the state of the environment. Therefore their diversity needs to be studied on a regional scale in order to take actions for their protection by national and international legislation. Here, the results of a butterfly survey in the northeastern part of Kosovo are presented. A total of 93 species were recorded from 2014 to 2017 in six localities, including seven Hesperiidae, four Papilionidae, 15 Pieridae, 25 Lycenidae, 41 Nymphalidae and a single species of Riodinidae. Six of them are listed in the Red List of European Butterflies, all as Near Threatened: Cupido decoloratus (Staudinger, 1886), Pseudophilotes vicrama (Moore, 1865), Hipparchia statilinus (Hufnagel, 1766), Melitaea aurelia (Nickerl, 1850), Melitaea diamina (Lang, 1789) and Parnassius mnemosyne (Linnaeus, 1758). Five species are listed in the recently published Red book of the fauna of Kosovo: two species as Vulnerable (VU), Lycaena dispar (Haworth, 1802) and Thecla betulae (Linnaeus, 1758) and three as Near Threatened, Cupido decoloratus (Staudinger, 1886), Papilio machaon (Linnaeus, 1758) and Zerynthia cerysi (Godart, 1824). From a zoogeographical point of view, the reported species represent eight faunal elements: 51 Euro-Siberian (ES), 27 Euro-Oriental (EO), six Euro-Meridional (EM), five Holarctic (Hol), two Tropical (Tro), one Boreo-Montane (BM), one Cosmopolitan (Cos) and one Mediterranean (Med). We conclude that 93 species of butterfly fauna recorded in this survey represent a relatively high diversity, but further surveys need to be organized in order to gather more data.

scholarly journals Teaching the Tatar language in Kazan institutes of higher education in the 1920s: from Old Turkic written language to the Dalton plan

2021 ◽  
Vol 6 (2) ◽  
pp. 208-220
Author(s):  
Lyudmila A. Bushueva ◽  
Keyword(s):  
Higher Education ◽  
Language Instruction ◽  
Written Language ◽  
Teaching Staff ◽  
The North ◽  
Wide Range ◽  
North Eastern ◽  
Source Studies ◽  
The Republic ◽  
Oriental Studies

The article examines the process of the Tatar language teaching formation in Kazan institutes of higher education in the 1920s on the example of institutes in the Humanities sphere: the North-Eastern Archaeological and Ethnographic Institute, the Eastern Academy and the Tatar National Branch of the Eastern Pedagogical Institute. The research is based on a wide range of unpublished sources from the funds of the State Archive of the Republic of Tatarstan. The study examines the curriculum of the disciplines within which the Tatar language was studied, the teaching forms and methods, as well as the formation of a team of specialists who taught the language during that period. Special attention is given to the study of the socio-political conditions in which the Tatar language instruction developed. It has been established that in the first years of the Soviet regime, the Tatar language was taught in Kazan institutes mainly by orientalists. Therefore, teaching this subject was closely related to oriental studies and source studies disciplines. Students mastered not only the spoken Tatar language, but also learned to work with Old Turkic writing manuscripts. Teaching the Tatar language in the second half of the 1920s was aimed primarily at training teachers of the native language. That period was distinguished by the instability of curricula, the introduction of new teaching methods, including the Dalton plan, and also changes in teaching staff.

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