A reconnaissance survey of the woody flora and vegetation of the Catapú logging concession, Cheringoma District, Mozambique

Bothalia ◽  
2007 ◽  
Vol 37 (1) ◽  
pp. 57-73 ◽  
Author(s):  
M. Coates Palgrave ◽  
A. E. Van Wyk ◽  
M. Jordaan ◽  
J. A. White ◽  
P. Sweet
Keyword(s):  
Transition Zone ◽  
Woody Species ◽  
River Valley ◽  
Regional Centre ◽  
The North ◽  
Reconnaissance Survey ◽  
Infraspecific Taxa ◽  
First Time ◽  
North And South ◽  
Zambezi River

A checklist of the trees, shrubs and Hanes of Catapú, Cheringoma District, Mozambique, is presented. Floristically the study area falls within the Swahilian/Maputaland Regional Transition Zone. In total, 238 woody species and infraspecific taxa have been recorded, representing 59 families and 167 genera. Most species (64%) occur both to the north and south of the study area. 26% have their core distribution in the Swahilian Regional Centre of Endemism, 4% have a more southerly distribution. 14 are endemic to the Swahilian/Maputaland Regional Transition Zone and two near-endemic, extending into the Zambezian Regional Centre of Endemism only along the Zambezi River Valley as far west as Kariba. The checklist includes the Sena names for 191 species, 77 of which are recorded for the first time. Comparisons of the Catapú checklist are made with other checklists.

scholarly journals Inventory and Distribution of Rock Glaciers in Northeastern Yakutia

Land ◽  
2020 ◽  
Vol 9 (10) ◽  
pp. 384
Author(s):  
Vasylii Lytkin
Keyword(s):  
Arid Regions ◽  
Remote Sensing Data ◽  
Field Studies ◽  
Optimal Conditions ◽  
North East ◽  
The North ◽  
Rock Glaciers ◽  
Detailed List ◽  
First Time ◽  
North And South

Rock glaciers are common forms of relief of the periglacial belt of many mountain structures in the world. They are potential sources of water in arid and semi-arid regions, and therefore their analysis is important in assessing water reserves. Mountain structures in the north-east of Yakutia have optimal conditions for the formation of rock glaciers, but they have not yet been studied in this regard. In this article, for the first time, we present a detailed list of rock glaciers in this region. Based on geoinformation mapping using remote sensing data and field studies within the Chersky, Verkhoyansk, Momsky and Suntar-Khayata ranges, 4503 rock glaciers with a total area of 224.6 km2 were discovered. They are located within absolute altitudes, from 503 to 2496 m. Their average minimum altitude was at 1456 m above sea level, and the maximum at 1527 m. Most of these formations are located on the sides of the trough valleys, and form extended sloping types of rock glaciers. An assessment of the exposure of the slopes where the rock glaciers are located showed that most of the rock glaciers are facing north and south.

To the Richest Go the Spoils? Immigration, Development, and the North-South Divide, 1970–2005

2016 ◽  
Vol 2 (3) ◽  
pp. 273-292
Author(s):  
Matthew R. Sanderson
Keyword(s):  
Economic Development ◽  
Global South ◽  
Positive Effects ◽  
The North ◽  
National Economic ◽  
Global North ◽  
First Time ◽  
The Relationship ◽  
North And South

This paper empirically assesses, for the first time, the relationship between immigration and national economic development in both the global North and the global South. A series of panel models demonstrate that immigration exacerbates North-South inequalities through differential effects on average per capita incomes in the global North and global South. Immigration has positive effects on average incomes in both the North and the South, but the effect is larger in the global North. Thus the relationship between immigration and development evinces a Matthew Effect at the world level: by contributing to differential levels of economic development in the North and South, immigration widens international inequalities in the long term, resulting in the accumulation of advantage in the North. The implications of the results are discussed in the context theory and policy on the migration-development nexus.

scholarly journals New records of the hairy crab Pilumnus dasypodus (Decapoda, Brachyura, Pilumnidae) in Northeastern Brazil

Check List ◽  
2015 ◽  
Vol 11 (2) ◽  
pp. 1563
Author(s):  
Sávio Arcanjo Santos Nascimento Moraes ◽  
Carlos Eduardo Rocha Duarte Alencar ◽  
Elena Thomsen ◽  
Fúlvio Aurélio Morais Freire
Keyword(s):  
New Record ◽  
New Records ◽  
Rio Grande ◽  
The State ◽  
South Coast ◽  
Northeastern Brazil ◽  
The North ◽  
First Time ◽  
North And South

Pilumnus dasypodus is reported for the first time in the state of Rio Grande do Norte, Northeastern Brazil. Sampling occurred in the north and south coast of the state in four locations (the farthest about 500 km of the known south distribution of the species). This new record increases the information about the distribution of this species, showing a possible relationship between the distribution of species and the Atlantic Tropical Ecoregion.

scholarly journals DISTRIBUCIÓN ESPACIAL DEL ÍNDICE DE CONCENTRACIÓN DE PRECIPITACIÓN DIARIA EN LOS ANDES CENTRALES PERUANOS: VALLE DEL RIO MANTARO

2017 ◽  
Vol 19 (2) ◽  
pp. 13 ◽  
Author(s):  
Ricardo Zubieta ◽  
Miguel Saavedra
Keyword(s):  
Concentration Index ◽  
Daily Precipitation ◽  
River Valley ◽  
Spatial And Temporal Patterns ◽  
Precipitation Concentration ◽  
The North ◽  
Palabras Clave ◽  
Del Rio ◽  
North And South ◽  
Rainy Days

Los altos porcentajes de concentración de precipitación diaria en pocos días, pueden incrementar el potencial de erosión, inestabilidad de laderas y riesgo de inundaciones, siendo estos problemas comunes en el Perú, por lo que es importante el conocimiento acerca de la precipitación a nivel diario. En este articulo, se ha llevado a cabo una investigación acerca de los patrones espaciales y temporales de la concentración de precipitación diaria en los andes centrales del Perú, mediante el índice de concentración (IC), que evalúa la variación de la valoración de precipitación diaria, la contribución de grandes lluvias a la cantidad total presentada. El índice es aplicado a una curva exponencial como Y = aX exp(bX ) , el cual ajusta el porcentaje acumulado de precipitación en Y contribuida por el porcentaje acumulado de días X llevado a cabo en un lugar, en el periodo 1964-2004, con el cual es posible generar superficies de concentración pluviométrica. Donde las máximas concentraciones registradas en el valle del rio Mantaro, posiblemente estén asociadas a la dinámica de los vientos, como la corriente de chorro de Sudamérica, que se adentran al valle proveniente del Norte y Sur. Donde el 25% de días más lluviosos representan el 60% o más de la cantidad total de días con lluvia. Palabras clave.-Índice de concentración, Precipitación diaria; Valle del rio Mantaro. ABSTRACTHigh percentages total precipitation concentration in a few very rainy days can increase the potential of erosion, instability and risks of floods, these problems are common in Peru. So it is important to know about the daily precipitation. This paper presents, an investigation of the spatial and temporal patterns of daily precipitation concentration, in central Andes of Perú, the Concentration index (CI) was evaluates measurement the varying weight of daily precipitation, the contribution of the days of greatest rainfall to the total amount. The index is applied to exponential curves such as Y = aX exp(bX), which adjust the accumulated percentages of precipitation Y contributed by the accumulated percentage of days X on which it took place, in the period 1964-2004, with which it is possible to generate concentration surfaces daily pluviometric. The highest concentrations recorded in the Mantaro river valley, may be associated with the dynamics of the winds as the stream in South America, leading into the valley from the north and south, where 25% of rainy days account for 60% or more of the total number of days with rain. Keywords.- Concentration index; Daily precipitation; Mantaro river valley.

scholarly journals Record of darkling beetles (Coleoptera: Tenebrionidae) from Mizoram state, India

2020 ◽  
Vol 30 (2) ◽  
Author(s):  
Vishwanath Dattatray Hegde ◽  
Sarita Yadav
Keyword(s):  
Zoological Survey ◽  
Regional Centre ◽  
The North ◽  
North Eastern ◽  
Darkling Beetles ◽  
First Time ◽  
Eastern Regional ◽  
Coleoptera Tenebrionidae

The earlier compiled collections of Tenebrionidae held at the North Eastern Regional Centre, Zoological Survey of India, Shillong were identified. The present study reports five species of Tenebrionidae belonging to three genera under three tribes of two subfamilies. The collected and identified Tenebrionid species are reported from the Mizoram state for the first time. The synonyms, distribution and images are also provided.

First record of the Hirnantian (Upper Ordovician) δ13C excursion in the North American Midcontinent and its regional implications

2006 ◽  
Vol 143 (5) ◽  
pp. 657-678 ◽  
Author(s):  
STIG M. BERGSTRÖM ◽  
MATTHEW M. SALTZMAN ◽  
BIRGER SCHMITZ
Keyword(s):  
South Africa ◽  
Sea Level ◽  
North American ◽  
First Record ◽  
Sea Level Changes ◽  
Upper Ordovician ◽  
The North ◽  
Study Interval ◽  
First Time ◽  
North And South

The most prominent of the two major global δ13C excursions in the Ordovician, the Hirnantian δ13C excursion (HICE), which is previously recorded from the uppermost Ordovician in a few sections in Nevada, Quebec, Arctic Canada, Baltoscandia, Scotland and China, is documented for the first time from the North American Midcontinent. Samples through the Girardeau Limestone and Leemon Formation in Missouri and Illinois show elevated δ13C values of +4‰ to +5‰. Although not determined precisely, the beginning of the HICE is likely to be in the upper part of the Orchard Creek Shale, and it ends in the upper Leemon Formation. Being extraordinarily useful chronostratigraphically, the presence of the HICE makes it possible to provide a firm dating of the study interval, whose age has long been controversial. Comparison between the study sections and coeval HICE sequences in North America and Europe show striking similarities, especially in sea-level history, indicating that major local lowstands reflect eustatic sea-level changes. A comparison with Hirnantian diamictite successions in North and South Africa and Argentina suggests that these lowstands correspond to two major Gondwanan glacial episodes.

Genetic differentiation and inversion clines in Indian natural populations of Drosophila melanogaster

Genome ◽  
1991 ◽  
Vol 34 (4) ◽  
pp. 618-625 ◽  
Author(s):  
Aparup Das ◽  
B. N. Singh
Keyword(s):  
Drosophila Melanogaster ◽  
Genetic Differentiation ◽  
Natural Populations ◽  
The South ◽  
The North ◽  
Chromosome Inversions ◽  
The Difference ◽  
And Inversion ◽  
First Time ◽  
North And South

To study the genetic differentiation and inversion clines in Indian natural populations of Drosophila melanogaster, 14 natural populations (6 from the north and 8 from the south) were screened for chromosome inversions. The chromosomal analysis revealed the presence of 23 paracentric inversions, which include 4 common cosmopolitan, 4 rare cosmopolitan, 2 recurrent endemic, and 13 unique endemic (new inversions detected for the first time) inversions. The difference in karyotype frequencies between populations from the north and south were highly significant and the level of inversion heterozygosity was higher in populations from the south. Statistically significant negative correlations were found between each of the four common cosmopolitan inversions and latitude. These findings are in accord with results from other worldwide geographic regions and show that Indian populations of D. melanogaster have undergone considerable genetic differentiation at the level of inversion polymorphism.Key words: Drosophila melanogaster, Indian natural populations, chromosome inversions, genetic differentiation, north–south clines.

Taxonomic And Distributional Notes on The Genus Sphaerophorus (Caliciales) In the Southern Hemisphere

1992 ◽  
Vol 24 (2) ◽  
pp. 119-131
Author(s):  
Mats Wedinal
Keyword(s):  
New Zealand ◽  
South America ◽  
Southern Hemisphere ◽  
Spore Wall ◽  
Spore Ornamentation ◽  
The North ◽  
First Time ◽  
North And South

Abstract Sphaerophorus diplotypus Vainio is reported as new to mainland Africa (Tanzania). Sphaerophorus digitaius Wang-Yang & Lai is reduced to a synonym of S. diplotypus. The name Sphaerophorus dodgei Ohlsson is validated and a description of the species is given. Sphaerophorus dodgei is recorded as being widespread and common in the Valdivian rainforest of Chile and Argentina. Sphaerophorus imshaugii Ohlsson is reported as new to the North and South Islands of New Zealand. Sphaerophorus macrocarpus Ohlsson is reported as new to South America (Chile). In S. dodgei and S. macrocarpus the spore ornamentation consists of mazaedial material added to the spore wall after the spores have been released from the asci. Concentric bodies occur in young ascospores of S. macrocarpus. A protocetraric-acid-deficient strain of S. microsporus Ohlsson is reported for the first time. Sphaerophorus tibellii Wedin, from northern New Zealand, is described as new.

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