scholarly journals Experiences of ryegrass endophyte on farms on the East Coast of the North Island

1999 ◽  
Vol 7 ◽  
pp. 33-37
Author(s):  
G.D. Milne ◽  
A.H. Russell ◽  
J.R. Russell ◽  
S.W. Russell ◽  
P.A. Russell
Keyword(s):  
Indirect Effects ◽  
Management Practices ◽  
East Coast ◽  
Climatic Conditions ◽  
Farm Management ◽  
Probable Reason ◽  
The North ◽  
History Of

A case study of a Hawke's Bay farm with a history of ryegrass staggers (RGS) and results of a survey of veterinarians from three regions are presented. A RGS outbreak in 1989 on the 'Tunanui' property at Sherenden resulted in the loss of 900 sheep and three cattle, with total costs estimated to be $61,000. There have been no severe outbreaks since then, despite similar climatic conditions occurring. The probable reason for this is a combination of improved awareness of RGS and conscious avoidance of the problems, and the indirect effects of other changes to farm management. The survey of veterinarians showed a rise in the prevalence of ryegrass endophyte related disorders in Manawatu and Waikato between the 1980s and 1990s, but no change for East Coast regions. Veterinarians spend very little time assisting clients with endophyte related problems, despite 41% of clients having problems. It is recommended that veterinarians provide more prevention advice to farmers, and farm management practices that successfully reduce RGS be promoted. Keywords: cattle, deaths, disorders, East Coast, farm, prevalence, remedies, ryegrass staggers, sheep, veterinarians

Scales and Units

2018 ◽  
Author(s):  
Kathryn M. de Luna
Keyword(s):  
Language Change ◽  
Historical Linguistics ◽  
Bantu Languages ◽  
The North ◽  
First Case ◽  
Linguistic Evidence ◽  
River Region ◽  
History Of ◽  
Alternative Approaches

This chapter uses two case studies to explore how historians study language movement and change through comparative historical linguistics. The first case study stands as a short chapter in the larger history of the expansion of Bantu languages across eastern, central, and southern Africa. It focuses on the expansion of proto-Kafue, ca. 950–1250, from a linguistic homeland in the middle Kafue River region to lands beyond the Lukanga swamps to the north and the Zambezi River to the south. This expansion was made possible by a dramatic reconfiguration of ties of kinship. The second case study explores linguistic evidence for ridicule along the Lozi-Botatwe frontier in the mid- to late 19th century. Significantly, the units and scales of language movement and change in precolonial periods rendered visible through comparative historical linguistics bring to our attention alternative approaches to language change and movement in contemporary Africa.

Ten Demi-Culverins for Aldeburgh: Whitehall, the Dunkirkers, and a Suffolk Fishing Community, 1625–1630

2019 ◽  
Vol 58 (2) ◽  
pp. 315-337 ◽  
Author(s):  
Thomas Cogswell
Keyword(s):  
North Sea ◽  
East Coast ◽  
Central Government ◽  
Fishing Community ◽  
Close Attention ◽  
The North ◽  
The North Sea ◽  
The Impact

AbstractHistorians have not paid close attention to the activities of freebooters operating out of Dunkirk in the late 1620s. This essay corrects that omission by first studying the threat from Dunkirk to England's east coast and then addressing how the central government, counties, and coastal towns responded. A surprisingly rich vein of manuscript material from Great Yarmouth and particularly from the Suffolk fishing community of Aldeburgh informs this case study of the impact of this conflict around the North Sea.

Effects of Continents and Supercontinents on Climate

2004 ◽  
Author(s):  
John J. W. Rogers ◽  
M. Santosh
Keyword(s):  
Global Climate ◽  
Climatic Conditions ◽  
Polar Regions ◽  
The North ◽  
Rock Types ◽  
Control Climate ◽  
The Earth ◽  
History Of ◽  
Earth’S Climate ◽  
Geologic Record

Continents affect the earth’s climate because they modify global wind patterns, control the paths of ocean currents, and absorb less heat than seawater. Throughout earth history the constant movement of continents and the episodic assembly of supercontinents has influenced both global climate and the climates of individual continents. In this chapter we discuss both present climate and the history of climate as far back in the geologic record as we can draw inferences. We concentrate on longterm changes that are affected by continental movements and omit discussion of processes with periodicities less than about 20,000 years. We refer readers to Clark et al. (1999) and Cronin (1999) if they are interested in such short-term processes as El Nino, periodic variations in solar irradiance, and Heinrich events. The chapter is divided into three sections. The first section describes the processes that control climate on the earth and includes a discussion of possible causes of glaciation that occurred over much of the earth at more than one time in the past. The second section investigates the types of evidence that geologists use to infer past climates. They include specific rock types that can form only under restricted climatic conditions, varieties of individual fossils, diversity of fossil populations, and information that the 18O/16O isotopic system can provide about temperatures of formation of ancient sediments. The third section recounts the history of the earth’s climate and relates changes to the growth and movement of continents. This history takes us from the Archean, when climates are virtually unknown, through various stages in the evolution of organic life, and ultimately to the causes of the present glaciation in both the north and the south polar regions. The earth’s climate is controlled both by processes that would operate even if continents did not exist and also by the positions and topographies of continents. We begin with the general controls, then discuss the specific effects of continents, and close with a brief discussion of processes that cause glaciation. The general climate of the earth is determined by the variation in the amount of sunshine received at different latitudes, by the earth’s rotation, and by the amount of arriving solar energy that is retained in the atmosphere.

Introducing the Oxford History of the Ancient Near East

2020 ◽  
pp. 1-26
Author(s):  
Karen Radner ◽  
Nadine Moeller ◽  
D. T. Potts
Keyword(s):  
Near East ◽  
Climatic Conditions ◽  
Ancient Near East ◽  
North African ◽  
Inter Tropical Convergence Zone ◽  
The North ◽  
Western Asia ◽  
History Of ◽  
Key Issues

With the emphasis of the Oxford History of the Ancient Near East firmly placed on the political, social, and cultural histories of the states and communities shaping Egypt and Western Asia (including the Levant, Anatolia, Mesopotamia, and Iran), this introduction to the five-volume series seeks to place the region in its environmental context. It discusses the lay of the land between the North African coast and the Hindu Kush, including the role of tectonics and geomorphology. It also considers some key issues regarding climatic conditions, focusing in particular on the significance of the Inter-Tropical Convergence Zone and the potential impact of megadroughts and pandemics.

The Taraxacum Flora of Ladakh, with notes on the adjacent regions of the West Himalaya

Phytotaxa ◽  
2020 ◽  
Vol 457 (1) ◽  
pp. 1-409
Author(s):  
JAN KIRSCHNER ◽  
JAN ŠTĚPÁNEK ◽  
LEOŠ KLIMEŠ ◽  
MIROSLAV DVORSKÝ ◽  
JOSEF BRŮNA ◽  
...  
Keyword(s):  
Climatic Conditions ◽  
Full Description ◽  
The Tibetan Plateau ◽  
Distribution Maps ◽  
The North ◽  
West Himalaya ◽  
Field Samples ◽  
History Of ◽  
Almost All ◽  
Gilgit Baltistan

Ladakh (Jammu & Kashmir State, NW. India) is a region in the Trans-Himalaya between the Great Himalayan Range in the south and the eastern Karakoram in the north, at the southwestern edge of the Tibetan Plateau. Its flora, vegetation, ecology and climatic conditions were thoroughly studied by the late Leoš Klimeš. As regards the genus Taraxacum (Compositae-Crepidinae), Ladakh was an almost unexplored area. L. Klimeš accumulated an ample material (50 Ladakh species are exclusively based on his material), either as field samples or as cultivated specimens; together with further recent collections of other collectors, cultivated by JK & JŠ, and the historical herbarium material, it forms a basis for the present monograph. It presents a taxonomic treatment of all Taraxacum species documented from Ladakh, including notes on ecology and distribution, and notes on dandelions from adjacent regions, mainly Gilgit-Baltistan, Spiti, Lahaul and the cis-Himalayan Kashmir. Each species is characterized by a full description, photographs of involucre, capitulum and achenes, whenever available; species are arranged systematically in sections, the latter also with descriptions and identification keys including all the taxa from Ladakh and adjacent areas. Treatments of five sections include all or almost all of their members. Distribution maps and a complete list of specimens studied are given for all Ladakh dandelions. A comprehensive introduction in the vegetation of Ladakh, general features of the genus Taraxacum and the history of its exploration are also provided. As regards the Taraxacum diversity, the broader region covered by the present monograph includes representatives of one third of the world sectional diversity. One hundred and twenty one taxa, belonging to 19 sections, are given a full tratment in the monograph, including those from adjacent regions (the latter, 46 species, also with full descriptions and illustrations); the Ladakh proper harbours 76 taxa in 17 sections, one of which is described as new. Fifty one taxa are described as new for science, 42 from Ladakh, 9 from other regions. For all species, the mode of reproduction is given (mostly inferred from indirect indicators). Only seven species were found at least partly sexual (five of them outside the limits of the Ladakh proper); all the other taxa exhibit agamospermy. Ladakh and adjacent regions of Pakistan and India rank among the regions with the highest sectional and morphological Taraxacum diversities.

The history and future of North Sea oil and gas: an environmental perspective

1987 ◽  
Vol 316 (1181) ◽  
pp. 487-493 ◽  
Keyword(s):  
North Sea ◽  
Management Practices ◽  
Oil And Gas ◽  
Petroleum Industry ◽  
The North ◽  
History Of ◽  
Assessment Techniques ◽  
Northern North Sea ◽  
Construction Operation ◽  
Biological Environment

The history of the development of the hydrocarbon resources of the North Sea is reviewed in an environmental context. The development of impact assessment techniques and practices and the evolution of monitoring of the physical, chemical and biological environment offshore and onshore, with reference to platforms, subsea pipelines, pipeline landfalls and terminal construction and operation is discussed. A brief account of the development of environmental protection management practices and their application to the design, construction, operation and management of major production projects follows. The paper concludes with a look at the environmental conditions likely to be established as the industry moves into the northern North Sea and areas such as the West Shetland Basin, and their significance for the petroleum industry.

Influence of Environmental Agents in Architecture. Tradition and Innovation. Romania: A Case Study

2012 ◽  
Vol 174-177 ◽  
pp. 1722-1725
Author(s):  
Ana Maria Dabija
Keyword(s):  
Indoor Environment ◽  
Building Materials ◽  
Climatic Conditions ◽  
Summer Season ◽  
Traditional Architecture ◽  
Local Conditions ◽  
The Past ◽  
The North ◽  
Environmental Agents

Geographically, Romania is situated in the continental temperate zone of Europe, with severe climatic conditions: the winters are very cold (with temperatures that can reach, in some provinces or in some days, values of -200C to –350C) and the summers very hot (in the past few years temperatures were between +38 - +400C, for weeks). Not only the air temperature gradient is broad (75 ÷ 800C), but as a consequence the temperature difference on the horizontal surfaces may rise to as much as 1000C. Romania is situated between parallels 430 and 480. In a very simple/simplistic approach, it can be considered as being half way between the North Pole and the Equator, therefore the constructive components can be identified in both the Northern architecture and the Southern one. The traditional architecture aims to provide a comfortable indoor environment both during the winter and the summer season, by using local building materials. Along with the building conformation, given by the local conditions (climate, earth, building materials), the peoples interventions (from religion to fashion) are also determinant. The paper presents some building principles, constructive systems and materials that transcend traditional architecture, in Romania.

scholarly journals Evolutionary history of the two North African hedgehogs (Mammalia: Erinaceidae) Atelerix algirus and Paraechinus aethiopicus based on phylogeography and species distribution modelling

2021 ◽  
Vol 71 ◽  
pp. 799-811
Author(s):  
Haithem El-Farhati ◽  
Mourad Khaldi ◽  
Alexis Ribas ◽  
Mohamed Wassim Hizem ◽  
Saïd Nouira ◽  
...  
Keyword(s):  
Evolutionary History ◽  
Species Distribution Modelling ◽  
Climatic Conditions ◽  
Climatic Suitability ◽  
North African ◽  
Niche Modelling ◽  
Distribution Modelling ◽  
The North ◽  
Low Genetic Diversity ◽  
History Of

Abstract Two species of hedgehogs are known to occur in northern part of Africa: the Algerian hedgehog Atelerix algirus and the Ethiopian hedgehog Paraechinus aethiopicus. Within each species several subspecies were described based on morphometrical data and pelage coloration, but all these subspecies have enigmatic and unclear definitions. We investigated the phylogeographical history and taxonomy of these two species based on mitochondrial DNA data covering the entire geographical distribution of A. algirus and the North African distribution of P. aethiopicus. We also used climatic niche modelling to make inferences about their evolutionary history. Low genetic diversity was recovered in both species. While no phylogeographic pattern was found in P. aethiopicus, two haplogroups were identified within A. algirus. This could be explained by the fact that continuous high or moderate climatic suitability occurred throughout most of the Saharan desert since the LGM (Last Glacial Maximum) for the first species, while during the LGM there were several disconnected areas of high climatic suitability for A. algirus: one in South-West Morocco, one at the coastal Moroccan-Algerian border and one in Tunisia-coastal Libya. Our genetic results confirm that A. algirus recently colonized Spain, Balearic and Canary Islands, and that this colonization was probably mediated by humans. Suitable climatic conditions occurred throughout most of the Southern and Eastern Iberian Peninsula during the last 6,000 years which could have favored the spatial expansion of the Algerian hedgehog after its arrival in Europe. According to our molecular results subspecific recognition within North Africa is unwarranted for both species.

scholarly journals If You Build It, They Will Come—Agroecosystem-Based Management Practices Support Pollinators

2020 ◽  
Author(s):  
Colton O’Brien ◽  
H S Arathi
Keyword(s):  
Cover Crops ◽  
Management Practices ◽  
Habitat Diversity ◽  
Farm Management ◽  
Field Margins ◽  
Population Declines ◽  
Natural Habitats ◽  
Cover Cropping ◽  
Insect Populations

Abstract Recent reports indicate that global insect populations are drastically declining, and amongst insects, bees have attracted significant attention. Decades of research on causal factors for bee population declines, indicate that extensive loss of natural habitats resulting from urbanization and agricultural intensification, has led to a dearth of critical nesting and forage resources essential for the sustenance of bees. To address these concerns and to meet the growing need for food production, simple but effective farm management practices such as restoring habitat diversity through planting pollinator habitats along field margins and underutilized areas, revegetating retired farmland with wildflowers and including pollinator-friendly forbs in cover crop mixes, have been recommended. Earlier studies have provided evidence that planting pollinator habitats along field margins and revegetating retired farmland are indeed viable ways to sustain bee pollinators. Here we report results of a case study exploring the benefits of cover cropping with a pollinator-friendly forb mix. Our results indicate that cover cropping to support pollinators can be effective, particularly when cover crops are retained until the flowering stage and that grazing of cover crops could extend support to those genera of bees that prefer grazed areas. Although the reports on global insect declines are dire, our studies show that pollinator-friendly farm management practices can offset the declines and play a significant role in supporting pollinator populations. Regular assessment of the efficacy of these practices will enable us to target efforts towards better implementation of habitat conservation programs.

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