SEASONAL CHANGES OF EPIPHYTIC ERWINIA AMYLOVORA ON ORNAMENTALS IN RELATION TO WEATHER CONDITIONS AND THE COURSE OF INFECTION

1981 ◽  
pp. 37-44 ◽  
Author(s):  
W. Brulez ◽  
W. Zeller
Keyword(s):  
Seasonal Changes ◽  
Erwinia Amylovora ◽  
Weather Conditions

The effect of weather conditions on harbour seal (Phoca vitulina) haulout behaviour in the Moray Firth, northeast Scotland

1996 ◽  
Vol 74 (10) ◽  
pp. 1806-1811 ◽  
Author(s):  
Kate Grellier ◽  
Paul M. Thompson ◽  
Heather M. Corpe
Keyword(s):  
Significant Relationship ◽  
Seasonal Changes ◽  
Negative Relationship ◽  
Weather Conditions ◽  
Phoca Vitulina ◽  
Effect Of Temperature ◽  
Harbour Seals ◽  
Moray Firth ◽  
A Site ◽  
The Relationship

Abundance data from a 6-year study (1988–1993) of harbour seals (Phoca vitulina) were used to control for seasonal changes in haulout behaviour and assess the effect of temperature and other weather conditions on haulout numbers at a site in Scotland. A significant relationship between Julian day and haulout numbers was consistent between years. In some years, there was also a significant relationship between ambient temperature and haulout numbers, but examination of the residuals around the relationship between haulout numbers and Julian day revealed no evidence for a consistent effect of temperature, wind speed, or wind-chill adjusted temperatures. A weak negative relationship between haulout numbers and both precipitation and cloud cover did exist, but these variables explained little of the variation in seal numbers.

Distribution of Hippoidea (Decapoda, Anomura) larvae off Veracruz, southern Gulf of Mexico: inferences about their migration route

Crustaceana ◽  
2019 ◽  
Vol 92 (5) ◽  
pp. 585-597
Author(s):  
Laura Sanvicente-Añorve ◽  
Santiago Aréstegui-Paz Rubio ◽  
Elia Lemus-Santana ◽  
Eugenia Allende-Arandía ◽  
Jorge Zavala-Hidalgo
Keyword(s):  
Gulf Of Mexico ◽  
Seasonal Changes ◽  
Larval Dispersal ◽  
Weather Conditions ◽  
High Variability ◽  
Migration Route ◽  
Migration Routes ◽  
Hypothetical Model ◽  
Western Atlantic ◽  
Southern Gulf Of Mexico

Abstract The distribution and abundance of hippoid zoeal stages offshore Veracruz, southern Gulf of Mexico, and the migration routes of these larvae in the western Atlantic, were analysed. Samples were collected with a Bongo net and larval dispersal was analysed applying the HYCOM hydrodynamical model; particles (virtual larvae) originating from 35 sites were tracked for 77 days. Larvae of Albunea paretii Guérin-Méneville, 1853 were the most abundant, and dispersal simulations indicated that older larvae occurring off Veracruz might originate from Texas. However, a substantial proportion of self-recruitment (7.8%) can occur, mainly due to the seasonal changes in direction of currents over the shelf as well as the high variability in weather conditions. Results also suggest that several generations of A. paretii are needed for the species to reach Veracruz from South America. A hypothetical model regarding the migration routes of A. paretii larvae in the western Atlantic is proposed.

SEASONAL CHANGES IN THE EPIPHYTIC POPULATION OF ERWINIA AMYLOVORA ON APPLE AND PEAR

1975 ◽  
Vol 55 (4) ◽  
pp. 1007-1012 ◽  
Author(s):  
J. DUECK ◽  
J. B. MORAND
Keyword(s):  
Seasonal Changes ◽  
Bacterial Population ◽  
Erwinia Amylovora ◽  
Pyrus Communis ◽  
Malus Sylvestris ◽  
Pyrus Communis L ◽  
Before And After ◽  
Apparently Healthy

Erwinia amylovora (Burr.) Winsl. et al., the pathogen causing fireblight, was readily isolated from symptomless leaves in blocks of Lodi apple (Malus sylvestris Mill.), Bartlett pear (Pyrus communis L.) and a multicultivar pear block. The frequency of positive assays appeared to be related to the incidence of fireblight symptoms. However, the percent positive samples was highly variable, making prediction of blight outbreaks difficult. The bacterial population was highest from mid-July to the end of August. Before and after this period numbers of E. amylovora were relatively low. The pathogen was isolated from apparently healthy dormant buds of Lodi apple and Flemish Beauty pear.

scholarly journals Short-Term Relationship between Hip Fracture and Weather Conditions in Two Spanish Health Areas with Different Climates

2015 ◽  
Vol 2015 ◽  
pp. 1-8 ◽  
Author(s):  
José María Tenías ◽  
Marisa Estarlich ◽  
Eusebio Crespo ◽  
Carmen Román-Ortiz ◽  
Angel Arias-Arias ◽  
...  
Keyword(s):  
Hip Fracture ◽  
Seasonal Changes ◽  
Weather Conditions ◽  
Mediterranean Area ◽  
Fracture Incidence ◽  
Short Term ◽  
Health Area ◽  
Hip Fracture Incidence ◽  
La Mancha ◽  
The Mediterranean

Objective. To evaluate differences in the short-term relationship between weather conditions and the incidence of hip fracture in people aged 65 and over among two regions of Spain.Methods. Hip fracture incidence was calculated for the years 2000–2008 for residents of Health Area 14 in Valencian Community (Mediterranean climate) and the “Mancha Centro” Health Area in Castilla-La Mancha (inland climate), Spain. The relationship between hip fracture incidence and weather was analyzed with a case-crossover design and explored in subgroups defined by sex, age, and fracture type.Results. In the inland area, a positive and significant tendency for hip fracture incidence was observed (annual increase: 1.5%) whereas in the Mediterranean area a seasonal increase of 9% was noted in autumn and winter with respect to spring. Weather conditions, especially wind, were significantly associated with hip fracture incidence: days with more frequent windy periods and/or a greater wind velocity were associated with an increase in hip fracture incidence of 51% in the Mediterranean area and 44% in the inland area.Conclusions. Hip fracture incidence exhibits seasonal changes that differ between the Mediterranean and inland areas. The short-term relationship with climate, although similar in both areas, may partly explain these seasonal changes.

Nutritive value of pasture: I. Seasonal variations in the productivity, botanical and chemical composition, and nutritive value of medium pasturage on a light sandy soil

1926 ◽  
Vol 16 (2) ◽  
pp. 205-274 ◽  
Author(s):  
Herbert Ernest Woodman ◽  
Denzil Layton Blunt ◽  
James Stewart
Keyword(s):  
Chemical Composition ◽  
Sandy Soil ◽  
Seasonal Changes ◽  
Nutritive Value ◽  
Weather Conditions ◽  
Pasture Grass ◽  
Initial Stage ◽  
Poa Trivialis ◽  
Medium Quality ◽  
Bromus Mollis

An account has been given of an investigation into the seasonal changes in the productivity, botanical and chemical composition, and nutritive value of pasture grass, the work constituting the initial stage of a comprehensive study of the nutritive properties of different types of pasture. The pasture on which the work was carried out was situated on a light sandy soil of low water-retaining capacity; the pasturage was of medium quality.Grazing was imitated by the daily use of a motor-mowing machine, the system of cutting being such as to ensure the whole plot being cut over once per week. The season was divided into ten periods, each period corresponding with the duration of a digestion trial carried out on two wether sheep. The main feature of the weather conditions during the season was the extremely low rainfall during the period from early June to mid-July.The pasture plot results were compared with corresponding results obtained from contiguous plots which were allowed to grow for hay, and from which, after removal of hay, several successive aftermath cuts were taken. The main findings of the investigation are summarised below:Seasonal changes in the botanical composition of the herbage. Although precise and systematic botanical analyses of the herbage of the pasture were not carried out, yet careful surveys made at an early and a late date in the season, together with general observations made during the whole course of the experiment, enabled interesting conclusions to be drawn in respect of the seasonal activity and persistency of the different species of grasses in the sward. During the spring season,Bromus mollis, Lolium perenne, Poa annuaandPoa trivialisaccounted for almost 80 per cent, of the herbage.

scholarly journals FEATURES OF INTRODUCED SPECIES OF LILAC (SYRINGA) FRUITING IN THE BASHKIR URALS

Ekosistemy ◽  
2020 ◽  
pp. 90-96
Author(s):  
N.V. Polyakova
Keyword(s):  
Introduced Species ◽  
Seasonal Changes ◽  
Ornamental Plants ◽  
Weather Conditions ◽  
Botanical Garden ◽  
Research Centre ◽  
Federal Research ◽  
Growing Conditions ◽  
Academy Of Sciences

Fruiting is an important characteristic of plant adaptation to new growing conditions. This is especially actual for ornamental plants, which, after successful introduction, can be used in landscaping of settlements. The genus Syringa L. has about 30 species, many of which can replenish the range of ornamental plants in the region. The collection of lilacs of the South Ural Botanical Garden-Institute of the UFIC RAS (Ufa Federal Research Centre of Russian Academy of Sciences) currently contains 11 species that have reached a generative state. The aim of this research is to identify the features of fruiting species of the genus Syringa during introduction in the conditions of the Bashkir Cis-Urals. The fruiting level of lilac species in the collection of the Botanical Garden was studied by determining the total number of fruits of the mother bushes. It is revealed that the fruiting level of introduced species of lilac is determined by the biological (hereditary) characteristics of the species and seasonal changes of weather conditions. S. velutina is characterized by the highest fruiting level, S. vulgaris and S. wolfii – by the lowest ones. It is assumed that there might be a tendency for dependence of the degree of fruiting on the quality of the formed pollen. Two taxa among all studied ones demonstrate fruiting level instability: S. reticulata ssp. reticulata blooms and bears fruit irregularly, while S. reticulata ssp. amurensis has regular abundant flowering, but there is a lack of fruiting in some years.

scholarly journals SPICE-Aided Modeling of Daily and Seasonal Changes in Properties of the Actual Photovoltaic Installation

Energies ◽  
2021 ◽  
Vol 14 (19) ◽  
pp. 6247
Author(s):  
Krzysztof Górecki ◽  
Jacek Dąbrowski ◽  
Ewa Krac
Keyword(s):  
Seasonal Changes ◽  
Weather Conditions ◽  
Electrical Energy ◽  
Solar Irradiation ◽  
Considerable Influence ◽  
Measurement Results ◽  
Different Seasons ◽  
Weather Parameters ◽  
Thermal Phenomena ◽  
Good Agreement

This article proposes a model of an actual photovoltaic installation situated in the Gdynia Maritime University, Poland. This model is formulated in the form of a SPICE network. In the presented model, the influence of selected weather parameters and thermal phenomena on the properties of the components of this installation are taken into account. The structure of the analyzed installation and the form of the formulated model are both presented. By means of this model, values of the power produced by the installation considered in different seasons and different times of the day are computed. The obtained computation results are compared to the measurement results. Good agreement between the results of measurements and computations is obtained. The obtained results of the investigations confirm the considerable influence of weather conditions, as well as daily and seasonal changes in solar irradiation and the ambient temperature, on the electrical energy produced. In the summer months, a decrease in the energy efficiency of the conversion of solar energy into electrical energy in comparison to the winter months is also visible and can even be twofold.

Seasonal changes in mesophyll ultrastructure of needles of Norway spruce (Picea abies)

1978 ◽  
Vol 56 (16) ◽  
pp. 1932-1940 ◽  
Author(s):  
Sirkka Soikkeli
Keyword(s):  
Cell Wall ◽  
Picea Abies ◽  
Norway Spruce ◽  
Seasonal Changes ◽  
Lipid Droplets ◽  
Cell Structure ◽  
Weather Conditions ◽  
Growing Season ◽  
Starch Grains ◽  
Mesophyll Ultrastructure

Seasonal changes in the ultrastructure of the mesophyll of needles of Norway spruce are described. During the growing season, the tannin is in the form of a ribbon along the margin of the vacuole or in the form of small, more or less scattered particles. The cytoplasm is dark and its organelles are along the cell wall; only the chloroplasts with large starch grains and the nucleus can be clearly resolved. During and after September, the cytoplasm is very netlike, all of the cytoplasmic organelles clump together, the amount of lipid droplets increases, and ribosomes are clearly visible. The tannin is in the form of rather large granules and it increases over its growing-season amount. The shape of chloroplasts changes. Chloroplasts lose their starch and the stroma becomes sparsely granular and rich in ribosomes. This structure is maintained throughout the winter. During spring activation, the cell structure is reorganized and reassumes the condition typical of the growing season. At this time, the needles have some collapsed cells and cells in which some chloroplasts are not quite intact. The injuries were probably caused by weather conditions (a warm period in March followed by a frost).

Weather and Climate

2017 ◽  
Author(s):  
Peter Mason
Keyword(s):  
Seasonal Changes ◽  
Major Element ◽  
Tourism Development ◽  
Weather Conditions ◽  
Related Concept ◽  
Annual Cycles ◽  
Significant Aspect ◽  
Weather And Climate ◽  
Vital Resource

Weather can be regarded as a vital resource for tourism, and Robinson (1976) suggested weather was a major element which contributes to tourism development. Although it is seen as less important in Peters’ (1969) grouping (see Chapter 3), Boniface and Cooper (2001) devote a separate chapter to climate, suggesting its importance for tourism, and this book follows suit with an entire chapter containing a discussion of weather and climate. However, it is climate (‘average weather conditions over a period of time’) that is particularly significant and Holden (2016) considers it to be the most important factor affecting tourism. This chapter discusses weather as a resource for tourism, and stresses that weather (and the related concept of climate) provides a very significant context for many tourism activities. The discussion below indicates that variations in climate occur in regular annual cycles and we refer to these as seasonal changes. The seasons, the cause of which is explained below, are a very significant aspect of tourism and the seasonality of tourism is largely the result of climate.

Stay healthy this monsoon with Ayurvedic lifestyle modifications

2019 ◽  
Vol 4 (1) ◽  
Author(s):  
Dr. Umapati C. Baragi ◽  
Dr.Jyoti M. Ganer ◽  
Dr. Pramod C. Baragi
Keyword(s):  
Seasonal Changes ◽  
Rainy Season ◽  
Weather Conditions ◽  
Review Article ◽  
The Body ◽  
Health Issues ◽  
Lifestyle Modifications ◽  
Diet And Lifestyle

Ritucharya is the term for the dietary and lifestyle regimens that are based on Earth's seasons. The belief is that illness can be prevented if diet and lifestyle reflect the changes in weather conditions. Ritucharya is the ancient Ayurvedic practice and is comprised of two words, “Ritu” which means season and “Charya” which means regimen or discipline. Ritucharya consists of lifestyle and Ayurvedic diet routine to cope with the bodily and mental impacts caused by seasonal changes as recommended by Ayurveda. Varsha Rutu (Monsoon) brings about vivid changes not only in the nature but also in the body. Our body is more susceptible to health issues during rainy season, because monsoon reduces the digestive fire in our body. Our body constantly gets affected with indigestion problems, viral fever, malaise etc. so we must keep our body resistant against such diseases. Hence this review article discusses the lifestyle modifications needed to preserve then body from diseases originating in Varsha Rutu.

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