scholarly journals Joint seasonality in geographic and ecological spaces, illustrated with a partially migratory bird

2019 ◽  
Author(s):  
Mathieu Basille ◽  
James Watling ◽  
Stephanie Romañach ◽  
Rena Borkhataria
Keyword(s):  
Environmental Conditions ◽  
Migratory Bird ◽  
Migratory Species ◽  
Temperature And Precipitation ◽  
Mycteria Americana ◽  
Species Dynamics ◽  
Flexible Framework ◽  
Geographic Distributions ◽  
Selection Of ◽  
Wood Storks

AbstractAs most species live in seasonal environments, considering varying conditions is essential to understand species dynamics in both geographic and ecological spaces. Both resident and migratory species need to contend with seasonality, and balance settling in favorable areas with tracking favorable environmental conditions during the year. We present an exploratory framework to jointly investigate a species’ niche in geographic and ecological spaces, applied to wood storks (Mycteria americana), which are partially migratory wading birds, in the southeastern U.S. We concurrently described monthly geographic distributions and climatic niches based on temperature and precipitation. Geographic distributions of wood storks were more similar throughout the year than were climatic niches, suggesting that birds stay within specific areas seasonally, rather than tracking areas of similar climate. However, wood storks expressed consistent selection of warm areas during the winter, and wet areas during the summer, indicating that the selection of seasonal ranges may be directly related to environmental conditions across the entire range. Our flexible framework, which simultaneously considered geographic and ecological spaces, suggested that tracking climate alone did not explain seasonal distributions of wood storks in breeding and non-breeding areas.

Optimal Offloading Configuration of Spread-Moored FPSOs

2009 ◽  
Vol 131 (2) ◽  
Author(s):  
Steven M. Wilkerson ◽  
Satish Nagarajaiah
Keyword(s):  
Environmental Conditions ◽  
Main Tool ◽  
Design Parameters ◽  
Optimization Approach ◽  
Analysis Model ◽  
Simple Analysis ◽  
Formal Approach ◽  
Fine Tune ◽  
Formal Optimization ◽  
Selection Of

As the oil offloading operations of floating production storage and offloading (FPSO) units become more routine, the desire grows to increase the availability for offloading and thus decrease production downtime. Experience with these operations is the main tool available to increase the efficiency of this aspect of deepwater production. However, it is clear that a formal optimization approach can help to fine tune design parameters so that not only is availability increased but the significance of each design parameter can be better understood. The key issue is to define the environmental conditions under which the vessels involved in offloading are able to maintain position. By this, we reduce the notion of availability to a set of operating criteria, which can or cannot be met for a particular set of environmental conditions. The actual operating criteria such as relative vessel heading depend on selection of design parameters, such as the direction and magnitude of external force applied by thrusters or tugs. In the earliest offloading operations, engineering judgment was used to determine the feasibility of offloading at a particular time. For example, if wind and current were not expected to exceed a 1year return period, offloading may be considered safe. This approach can be both conservative and unconservative, depending on the nuances of the particular environmental conditions. This study will propose a formal approach to choosing the design parameters that optimize the availability of a FPSO for offloading. A simple analysis model will be employed so that optimization can be performed quickly using a robust second order method. The proposed analysis model will be compared to model test data to demonstrate its agreement with the more complex system.

scholarly journals Isolated individuals and groups show opposite preferences toward humidity

2018 ◽  
Author(s):  
Mariano Calvo Martín ◽  
Stamatios C. Nicolis ◽  
Isaac Planas-Sitjà ◽  
Jean-Christophe de Biseau ◽  
Jean-Louis Deneubourg
Keyword(s):  
Relative Humidity ◽  
Environmental Conditions ◽  
Group Level ◽  
Individual Level ◽  
Negative Effect ◽  
Multi Level ◽  
The Individual ◽  
Shed Light ◽  
Selection Of

AbstractCockroaches, like most social arthropods, are led to choose collectively among different alternative resting places. These decisions are modulated by different factors, such as environmental conditions (temperature, relative humidity) and sociality (groups size, nature of communications). The aim of this study is to establish the interplay between environmental conditions and the modulation of the interactions between individuals within a group leading to an inversion of preferences. We show that the preferences of isolated cockroaches and groups of 16 individuals, on the selection of the relative humidity of a shelter are inversed and shed light on the mechanisms involved. We suggest that the relative humidity has a multi-level influence on cockroaches, manifested as an attractant effect at the individual level and as a negative effect at the group level, modulating the interactions.

scholarly journals Proses Public Relations Dalam Program Gerakan Pungut Sampah Pemerintah Kota Bandung

2016 ◽  
Vol 19 (2) ◽  
pp. 95-108 ◽  
Author(s):  
Susie Perbawasari ◽  
Diah Fatma Sjoraida ◽  
Vidia Ayu Lestari
Keyword(s):  
Decision Making ◽  
Social Media ◽  
Public Relations ◽  
Goal Setting ◽  
Environmental Conditions ◽  
Budget Planning ◽  
The Public ◽  
Descriptive Method ◽  
Planning Action ◽  
Selection Of

GPS program was launched in order to improve people's active participation, creating awareness of the importance of protecting the environment, and build a new culture picking up trash. Communications and delivery of messages is done through socialization programs and social media, twitter. The purpose of this study to find out the Public Relations process that consists of collecting of facts and formulation of the problem, the planning and programming, the action and communication, and the evaluation of GPS program that has been done by the organizers. This study used descriptive method. Data collected were through interviews, observation and documents. The organizers of GPS program begins by listening to the comments that raised by external parties, also took to the field looking directly environmental conditions in Bandung to collecting the facts. Organizers prepared GPS program includes the introduction of the situation, goal setting, audience definition, selection of media and techniques of Public Relations, as well as budget planning. Action taken in the program organizers GPS is acting responsive and responsible, while communication in the program include Credibility, Context, Content, Clarity, Continuity and consistency, Channel, and Capability of the Audience. Evaluation program providers include evaluation for decision-making, evaluation of the achievement of objectives, evaluation of results and impact and evaluation of the implementation.

scholarly journals ECOLOGICAL-GEOGRAPHIC APPROACHES TO THE STUDY OF GENETIC DIVERSITY OF BARLEY AND OAT FROM THE VIR COLLECTION

2020 ◽  
Author(s):  
Igor Loskutov ◽  
Lubov Novikova ◽  
Olga Kovaleva ◽  
Nadezhda Ivanova ◽  
Elena Blinova ◽  
...  
Keyword(s):  
Environmental Conditions ◽  
Growing Season ◽  
Regression Coefficients ◽  
Cultivation Conditions ◽  
High Productivity ◽  
Sum Of Effective Temperatures ◽  
Economically Valuable Traits ◽  
Effective Temperatures ◽  
The Stability ◽  
Selection Of

Under conditions of climate change, the assessment of the stability of genotypes is of particular importance. To conduct directed selection of genotypes with a narrow or broad reaction rate, it is necessary to assess their stability already in the early stages of breeding. The aim of the study was to study the stability of breeding significant traits of oat and barley samples in contrasting ecological and geographical conditions. 25 oat samples and 25 barley samples were studied over 3 years under contrasting conditions in St. Petersburg and the Tambov region. Varieties are characterized by average values of economically valuable traits and genotype regression coefficients on the influence of the bi environment according to Eberhart and Russell. The most sensitive to a change in the ecological and geographical situation were the durations of the germination-heading, germination-harvest periods and grain yield. These characters varied to a greater extent depending on the cultivation conditions than on the genotype. According to regression coefficients for environmental conditions, significant differences in genotypes were only in yield. Contrasting groups of varieties were distinguished by regression coefficients on environmental conditions, genotypes with high productivity. The durations of germination-heading, germination-harvest, the plant height reacted to the change in the environment the same in different varieties. The duration of the growing season was determined by the sum of effective temperatures above 15C. The reduction of the growing season in both crops was 3 days with an increase in the sum of effective temperatures above 15C by 100C.

scholarly journals Transplantation of the Mediterranean seagrass Posidonia oceanica through naturalistic engineering techniques: value, weakness and further improvements

2015 ◽  
Author(s):  
Stefano Acunto ◽  
Luigi Piazzi ◽  
Francesco L. Cinelli ◽  
Anna Maria De Biasi ◽  
Lorenzo Pacciardi ◽  
...  
Keyword(s):  
Environmental Conditions ◽  
Large Scale ◽  
Focal Point ◽  
Posidonia Oceanica ◽  
Hydrodynamic Conditions ◽  
Coastal System ◽  
Pros And Cons ◽  
The Mediterranean ◽  
Selection Of

Transplantation of seagrasses is considered a useful method to favour the recovery of degraded meadows. Hence, many projects have been carried out worldwide and a manifold of techniques have been applied. However, the choice of transplantation procedures remains a main problem to be assessed. In order to optimize efforts and to minimize risks of plants loss, the applied methodologies should take into account typology of hosting substratum, hydrodynamic conditions, depth and seagrass species. Due to their fundamental ecological role in the Mediterranean coastal system, many restoration projects aiming to preserve Posidonia oceanica meadows took place in the last decades. Several transplantation techniques have produced different results. In fact the same transplanting methodology may originate diverse results under different environmental conditions. Recently, naturalistic engineering techniques developed on land, have been used for transplantations of P. oceanica. Pilot projects concerning small surfaces were carried out between 2006 and 2010. More recently, a large-scale program (0.1 km2) was realized in 2012 at Civitavecchia (Roma, Thyrrenian Sea). The applied technique consists basically of mattresses filled with sand coupled with a net covering able to hold steady in situ the plant rhizomes. These structures have been variously modified in time to be adapted to the different type of substratum and various hydrodynamic conditions of the transplanting sites. Following the results of these transplantation experiences, we analyzed pros and cons of the techniques in order to improve the methodology. Firstly, these techniques may be considered suitable to large-scale projects allowing to minimize transplantation times. Secondly, the rhizomes may be successfully fixed to the structures; the majority of the transplanted shoots was not damaged showing a very good vegetative vitality with the production of new rhizomes, leaves and roots few months after transplanting. Finally, this procedure is flexible, as the basic technique can be modified and tailored to the various environmental conditions of the different receiving site. However, the results obtained in different areas are highly heterogeneous suggesting that a careful selection of the hosting site is a focal point. To this aim, a pilot study before the beginning of large-scale project seems mandatory, providing a fundamental support to guarantee successful results.

scholarly journals Analisis Mural Karya Arnis Muhammad Ditinjau Dari Segi Fungsi dan Gaya

2021 ◽  
Vol 4 (2) ◽  
pp. 767-773
Author(s):  
Alpiza Simah Budi ◽  
Daulat Saragi
Keyword(s):  
Everyday Life ◽  
Public Space ◽  
Environmental Conditions ◽  
General Public ◽  
Qualitative Method ◽  
Sampling Technique ◽  
Two Dimensional ◽  
Aesthetic Value ◽  
Work Of Art ◽  
Selection Of

This study aims to describe the function and style of the mural by Arnis Muhammad. Mural as art in public space, which means that the space for movement and the target audience for the audience and audience is the general public. As a two-dimensional work of art, mural is also inseparable from style. Visually, the style in a work of art is the selection of objects, techniques, colors, and environmental conditions, time, era, and environmental conditions in which an artist creates his work. The population in this research is that all of Arnis Muhammad's mural works for the 2017-2019 period are 51 works. In this study the authors took samples using purposive sampling technique. The reason for taking samples is the number of mural works that still exist and are still intact. There are 10 mural works in the research location. In this case, the writer examines these mural works based on their function and style. The method used in this research is descriptive qualitative method. The function of the mural by Arnis Muhammad is a personal function as a reflection of the resonance of the environment in which he lives. Social function, as a form of concern for the environment and the surrounding community in everyday life. Physical function, as an aesthetic value enhancer and the various ways the general public use it. Arnis Muhammad's murals tend to have a surreal and decorative style.

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