scholarly journals The Handsome Cross Grasshopper Oedaleus decorus (Germar, 1825) (Orthoptera: Acrididae) as a Neglected Pest in the South-Eastern Part of West Siberian Plain

Insects ◽  
2022 ◽  
Vol 13 (1) ◽  
pp. 49
Author(s):  
Kristina V. Popova ◽  
Natalya S. Baturina ◽  
Vladimir V. Molodtsov ◽  
Oxana V. Yefremova ◽  
Vasily D. Zharkov ◽  
...  

Oedaleus decorus is a widely distributed acridid over the Eurasian semi-arid territories, from the Atlantic coast to the Pacific coast. In many semi-arid territories, O. decorus was and is the most important pest, but in the south-eastern part of West Siberian Plain, it was not considered a pest until the 1960s. We compared two sets of data on the acridid distribution in the region: before 1960 and from 1961 until 2021. Until the 1960s, the species occurred mainly in the southern steppes. Since the 1960s, its distribution changed significantly. Nowadays, it occupies almost all local steppes and the southern part of the forest-steppes and can be also found on the eastern side of the Ob River. These shifts may be explained by both climatic changes and changes in human activities. During upsurges the densities of O. decorus were often more than one to two adults per square meter. It is often abundant in the same habitats and in the same periods as the Italian locust (Calliptamus italicus)—one of the most important acridid pests. This means during joint outbreaks these two species can simultaneously damage almost all spectrum of plants.

Author(s):  
José Araya-Vergara

Suess (1900) provided the first scientific treatment of the South American coast from a tectonic perspective when he distinguished between the Atlantic and Pacific structural styles on opposite sides of the continent. Inman and Nordstrom (1971) later complemented this approach by relating these styles to the concepts of plate tectonics that had emerged during the 1960s. Useful keys to understanding South American coastal processes and sediment supplies were then offered by Davies (1977) and Potter (1994), respectively, while regional accounts of South American coastal landforms were made by specialists in books edited by Bird and Schwartz (1985) and Schwartz (2005). Clapperton (1993) reviewed Quaternary coastal morphogenesis. Coastal sites of scientific importance and historical coastline changes were discussed by Bird and Koike (1981) and Bird (1985). This chapter focuses on the principal factors involved in coastal evolution and morphogenesis, describes key regional landforms, and proposes a new analytical perspective for South America’s coasts by introducing a hierarchical system within coastal groups. The main coastline of South America is approximately 31,100 km long, of which 10,400 km face the Pacific Ocean, 16,700 the open Atlantic Ocean, and the remaining 4,000 km the more sheltered Caribbean Sea. Of the total length, approximately two-thirds lie within the tropics, ensuring that physical and ecological responses to ocean-atmosphere circulation systems involving the Intertropical Convergence Zone dominate these coasts. The remaining one third of the coast beyond the tropics is dominated during part or all of the year by temperate westerly conditions, which become increasingly cool and stormy toward the continent’s southern tip. The origins of the present coast reflect the tectonic forces that have affected the South American plate over the past 200 million years, augmented by relative sea-level changes associated with changing global (eustatic) ocean volume and regional (isostatic) crustal adjustments. The Atlantic coast of South America owes its broad outline to the separation of the continent from neighboring parts of Gondwana that began more than 200 Ma (million years ago). The Pacific and Caribbean coasts have a more complex history, related to the progressive interaction of the westwardmoving South American plate with four oceanic plates with which it has come into contact).


2021 ◽  
Vol 50 ◽  
pp. 1-9
Author(s):  
Joanna Siekiera ◽  

Cooperation in the South Pacific region is unique due to the characteristics of its participants. Following the period of decolonization (1962-1980), countries in Oceania have radically changed. Achieving independence gave those nations international legal personality, yet complete independence from their former colonial powers. The following consequence was gaining an opportunity to draft, adopt and execute own laws in national and foreign policy. PICT (Pacific island countries and territories) have been expanding connections, political and trade ones, within the region since the 1960s when permanent migration of islanders and intra-regional transactions began. Migrations along with foreign aid are considered as the distinctive characteristics of the Pacific Ocean basin. Since the 1980s, the regional integration in Oceania, through establishing regional groupings and increasing the regional trade agreements number, took on pace and scope. The MIRAB synthetic measure (migration, remittances, aid, bureaucracy) has been used in analyzing the Oceania developing microeconomies. Last but not least, migration and foreign aid have been retaining the region from a deeper and more effective stage of regionalism.


2003 ◽  
Vol 34 (4) ◽  
pp. 631
Author(s):  
Sir Kenneth Keith ◽  
A H Angelo

Dr Colin Aikman served as Dean of the Victoria University of Wellington Law School. This article focuses on aspects of Dr Aikman's seminal lecture of the 1960s on law in the South Pacific, and on the impact of the constitutional thinking of Dr Aikman in the Pacific on a generation of students and colleagues in the Law Faculty of Victoria University of Wellington. 


2017 ◽  
Vol 47 (4) ◽  
pp. 693-702 ◽  
Author(s):  
André da Silva Salvaterra ◽  
Rosangela Felício dos Santos ◽  
Alexandre Barbosa Salaroli ◽  
Rubens Cesar Lopes Figueira ◽  
Michel Michaelovitch de Mahiques

ABSTRACT: In this paper, we present new evidence regarding a Marine Isotope Stage 3 (MIS3) transgression on the south-eastern Brazilian coast (Baixada Santista coastal plain). Data collected from a Standard Penetration Test (SPT) drilling reveal the occurrence of myxohaline sediments between cal BP 45,000 and 41,000. A deeper sequence, which shows a clear transition from terrestrial to a myxohaline environment, was associated with MIS5e. Organic and inorganic proxies have been used to recognize the variations on the terrestrial/myxohaline/marine deposits, as well as to infer about climate and energy of the depositional environment. Environmental change, which could correspond to a sea-level peak or the occurrence of drier conditions, was recognized between 43,000 and 42,000 cal BP. The results reinforce the need for future works on MIS3 variability on the South American Atlantic coast.


2021 ◽  
Author(s):  
Michael Sergeev ◽  
Kristina Popova ◽  
Natalia Baturina ◽  
Vladimir Molodtsov ◽  
Oxana Yefremova ◽  
...  

2015 ◽  
Vol 77 ◽  
pp. 15-18
Author(s):  
J. Falloon

Wai'ra'rapa - The place Maori called "Land of Glistening Waters". Wairarapa is a region of big skies, wide valleys rolling hill country and rugged coastline. It has a total land area of 8423 square kilometres. The region is named after Lake Wairarapa, which situated at the bottom of the Wairarapa Plain, North of Palliser Bay. Wairarapa is located on the South Eastern Corner of the North Island bounded by the Pacific Ocean in the East, Tararua district in the North and the Tararua Ranges in the west.


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