Spatial distribution of dinoflagellates from the tropical coastal waters of the South Andaman, India: Implications for coastal pollution monitoring

The present work is aimed at facilitating conservation efforts of a rare species of sea urchin (Colobocentrotus atratus) reported nearly eight decades after its initial description by Bell (1887) and later by Clarke (1925) from the coastal waters of south Andaman Islands. Recently, during a three years study (2011-14) on the macrobenthic epifauna along the south Andaman coast, five live specimens of C. atratus were recorded from Kodiyaghat (11031'532''N; 092043'457'' E), south Andaman Islands. Available information shows that this species has reappeared in the south Andaman Islands seventy nine years after the citation by Sastry (1994) collected in the year 1935. The disappearance of this species from the literature in the intermittent years and a sparse population in coastal reaches of south Andaman Islands at present suggest that this species makes a candidate taxa for inclusion in the list of ‘endangered’ or ‘vulnerable’ Indian marine species following IUCN Red List criteria to Wild species.

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Spatial Distribution and Geographical Mechanism of Natural Resources in China under the Orientation of the New Economic Demands

Sustainability ◽

10.3390/su13147956 ◽

2021 ◽

Vol 13 (14) ◽

pp. 7956

Author(s):

Xiangmin Zhang ◽

Bin Yu ◽

Hailong Yu ◽

Zhuofan Li ◽

Shen Luo ◽

...

Keyword(s):

Spatial Distribution ◽

Natural Resources ◽

New Economy ◽

The South ◽

The North ◽

Ecological Resources ◽

Demand Structure ◽

Administrative Units ◽

Location Map ◽

Resource Elements

The demand structure of resources for new economy is different from the traditional one in that its development may significantly change China’s economic location map and spatial pattern. Based on 343 administrative units of prefecture-level cities in China, this research constructs the measurement index system of terrestrial surface natural resources under the orientation of the new economic demands; this research mainly analyses the spatial distribution characteristics and geographical mechanism of natural resources by means of the spatial autocorrelation and spatial similarity calculation methods. The results show that: (1) The structure and endowment of natural resources under the orientation of the new economic demands need to be reexamined. The significance of a good environment and ecological resources has been highlighted. The coupling of resource elements better reveals the availability of natural resources. (2) The natural resources decrease from southeast to northwest, showing a pattern of “abundant in the south and east and scarce in the north and west”. Natural resources have a significant positive correlation in spatial distribution with two types of agglomeration: high-high agglomeration and low-low agglomeration, showing the local agglomeration feature of “high in the south and low in the north”. (3) Natural factors such as temperature, precipitation and altitude affect the spatial distribution of natural resources, with the temperature being the most significant. This indicates that the original natural environment and its role are the geographical mechanism for the formation and distribution of natural resources. The results could provide a reference for the development and the optimization of China’s new economy.

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Spatial distribution of temperature and precipitation in the South Ural Region

IOP Conference Series Earth and Environmental Science ◽

10.1088/1755-1315/579/1/012085 ◽

2020 ◽

Vol 579 ◽

pp. 012085

Author(s):

M V Panina ◽

N N Nazarenko

Keyword(s):

Spatial Distribution ◽

Ural Region ◽

The South ◽

Temperature And Precipitation

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Archaeal Diversity and Spatial Distribution in the Surface Sediment of the South China Sea

Geomicrobiology Journal ◽

10.1080/01490451.2013.797522 ◽

2013 ◽

Vol 31 (1) ◽

pp. 1-11 ◽

Cited By ~ 6

Author(s):

Peng Wang ◽

Yuli Wei ◽

Tao Li ◽

Fuyan Li ◽

Jun Meng ◽

...

Keyword(s):

Spatial Distribution ◽

South China Sea ◽

South China ◽

Surface Sediment ◽

The South China Sea ◽

Archaeal Diversity ◽

The South ◽

China Sea

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Power analysis for biomarkers in mussels for use in coastal pollution monitoring

Marine Pollution Bulletin ◽

10.1016/j.marpolbul.2009.04.003 ◽

2009 ◽

Vol 58 (8) ◽

pp. 1152-1158 ◽

Cited By ~ 8

Author(s):

J.K.H. Fang ◽

R.S.S. Wu ◽

C.K.M. Yip ◽

P.K.S. Shin

Keyword(s):

Power Analysis ◽

Pollution Monitoring ◽

Coastal Pollution

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3D lithostratigraphic model of the Paleogene of the onshore part of the Moesian Platform (Northeast Bulgaria)

Geologica Balcanica ◽

10.52321/geolbalc.47.1.23 ◽

2018 ◽

Vol 47 (1) ◽

pp. 23-36

Author(s):

Boris Valchev ◽

Dimitar Sachkov ◽

Sava Juranov

Keyword(s):

Spatial Distribution ◽

Sedimentary Rocks ◽

Eastern Slope ◽

The South ◽

The North ◽

Lithostratigraphic Units ◽

Moesian Platform ◽

Regional Tectonic ◽

Model Database ◽

The Individual

The Paleogene sedimentary rocks in the north-easternmost part of the territory of Bulgaria have been penetrated by numerous boreholes. In terms of regional tectonic zonation, the study area is a part of the onshore sector of the Moesian Platform, which partly includes the South Dobrogea Unit and the easternmost part of the North Bulgarian Dome with its eastern slope. The lithostratigraphy of the Paleogene successions consists of six formal units (the Komarevo, Beloslav, Dikilitash, Aladan, Avren, and Ruslar formations) and one informal unit (glauconitic marker). For compiling an overall conception of the regional aspects (lithology, thickness, spatial distribution, and relationships) of the individual lithostratigraphic units and for illustration of their spatial distribution, a 3D lithostratigraphic model based on reinterpretation of individual borehole sections has been created. The model database was compiled by integration of the original lithological data from 338 borehole sections.

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FAKTOR PENGELOLAAN YANG MEMPENGARUHI TINGKAT PRODUKSI RUMPUT LAUT Kappaphycus alvarezii DI PERAIRAN PANTAI SELATAN PROVINSI SULAWESI SELATAN

Jurnal Riset Akuakultur ◽

10.15578/jra.5.3.2010.491-504 ◽

2016 ◽

Vol 5 (3) ◽

pp. 491

Author(s):

Erna Ratnawati ◽

Akhmad Mustafa ◽

Rohama Daud

Keyword(s):

Coastal Waters ◽

Management Practices ◽

Kappaphycus Alvarezii ◽

The South ◽

Dummy Variable ◽

South Sulawesi ◽

Yield Production ◽

Long Line ◽

Seed Origin ◽

Seaweed Production

Perairan pantai Kabupaten Jeneponto, Bantaeng, dan Bulukumba merupakan sentra produksi rumput laut Kappaphycus alvarezii di Sulawesi Selatan. Pengelolaan budidaya yang dilakukan oleh pembudidaya di daerah tersebut cukup bervariasi sehingga dilakukan penelitian yang bertujuan untuk mengetahui faktor pengelolaan budidaya yang mempengaruhi produksi rumput laut. Metode survai melalui pengajuan kuesioner kepada 62 responden secara terstruktur. Sebagai peubah tidak bebas dalam penelitian ini adalah produksi rumput laut, sedangkan peubah bebas adalah faktor pengelolaan budidaya. Analisis regresi berganda dengan peubah boneka digunakan untuk memprediksi produksi rumput laut. Hasil penelitian menunjukkan bahwa produksi rumput laut di perairan selatan Sulawesi Selatan berkisar antara 463-5.000 dengan rata-rata 1.502,3 kg kering/3.000 m2 yang dibudidayakan dengan tali panjang. Faktor pengelolaan budidaya yang mempengaruhi produksi rumput laut adalah jarak antar tali ris, jarak antar rumpun dalam tali ris, hama baronang, penyakit ice-ice, bobot bibit, asal bibit dan sumber cemaran. Untuk meningkatkan produksi rumput laut di perairan selatan Sulawesi Selatan dapat dilakukan melalui peningkatan bobot bibit antara 36,9 sampai 100,0 g/rumpun, menggunakan bibit yang tidak diangkut terlalu lama, tidak menambah jarak antar tali ris sampai melebihi 1,0 m, tidak menambah jarak antar rumpun dalam tali ris yang melebihi 25 cm serta melakukan penanaman berdasar kalender musim tanam untuk mencegah terjadinya serangan hama dan penyakit serta cemaran.Coastal waters of Jeneponto, Bantaeng, and Bulukumba Regencies are the centre of seaweed Kappaphycus alvarezii production in South Sulawesi. Culture management practices applied by farmers in these areas are highly variable. Therefore, this research was conducted to study culture management practices affect the seaweed production in the area. Field survey was conducted by interviewing 62 respondents using questionnaires. The dependent variable in this research was seaweed production, while the independent variables were culture management factors. Multiple regressions with dummy variable were employed to analyze the data to predict seaweed production. The results show that the seaweed productions per one cycle in the south coastal waters of South Sulawesi were ranging from 463 to 5,000 kg dry/3,000 m2. Using long line method, the average yield production was 1,502.3 kg dry/3,000 m2. Culture management practices that affect the seaweed production were distance between ropes, distance between seaweed seeds along the rope, rabbitfish predatory, ice-ice disease, weight of seed, seed origin, and source of pollution. Increasing seaweed production in the south coastal waters of South Sulawesi could be done through increasing weight of seed from 36.9 to 100.0 g/clump, quicker transport of seed, maintaining the distance between the ropes not more than 1.0 m, not increasing the distance between clump along the ropes more than 25 cm along as well as conducting seed planting based on cultivating season to prevent pest diseases and pollution.

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A weather regime characterisation of winter biomass aerosol transport from southern Africa

10.5194/acp-2021-337 ◽

2021 ◽

Author(s):

Marco Gaetani ◽

Benjamin Pohl ◽

Maria del Carmen Alvarez Castro ◽

Cyrille Flamant ◽

Paola Formenti

Keyword(s):

Spatial Distribution ◽

Southern Africa ◽

Forest Fires ◽

South Atlantic ◽

Austral Winter ◽

The South ◽

Predictive Tool ◽

Weather Regime ◽

Synoptic Variability

Abstract. During austral winter, a compact low cloud deck over South Atlantic contrasts with clear sky over southern Africa, where forest fires triggered by dry conditions emit large amount of biomass burning aerosols (BBA) in the free troposphere. Most of the BBA burden crosses South Atlantic embedded in the tropical easterly flow. However, midlatitude synoptic disturbances can deflect part of the aerosol from the main transport path towards southern extratropics. In this study, a characterisation of the synoptic variability controlling the spatial distribution of BBA in southern Africa and South Atlantic during austral winter (August to October) is presented. By analysing atmospheric circulation data from reanalysis products, a 6-class weather regime (WR) classification of the region is constructed. The classification reveals that the synoptic variability is composed by four WRs representing disturbances travelling at midlatitudes, and two WRs accounting for pressure anomalies in the South Atlantic. The WR classification is then successfully used to characterise the aerosol spatial distribution in the region in the period 2003–2017, in both reanalysis products and station data. Results show that the BBA transport towards southern extratropics is controlled by weather regimes associated with midlatitude synoptic disturbances. In particular, depending on the relative position of the pressure anomalies along the midlatitude westerly flow, the BBA transport is deflected from the main tropical route towards southern Africa or the South Atlantic. This paper presents the first objective classification of the winter synoptic circulation over South Atlantic and southern Africa. The classification shows skills in characterising the BBA transport, indicating the potential for using it as a diagnostic/predictive tool for aerosol dynamics, which is a key component for the full understanding and modelling of the complex radiation-aerosol-cloud interactions controlling the atmospheric radiative budget in the region.

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