scholarly journals Dynamiken i smålommens Gavia stellata val av häckningslokaler – övergivande, ny- och återetableringar

Ornis Svecica ◽  
2013 ◽  
Vol 23 (3–4) ◽  
pp. 130-142
Author(s):  
Mats O G Eriksson ◽  
Matti Åhlund

Red-throated Loons Gavia stellata have disappeared from breeding sites regularly used in the mid-1990s, but it is not clear if this reflects a population decline or movements to other sites. Therefore, we searched for potential breeding sites, including sites with old records, in three regions in southern Sweden, where it was possible to repeat surveys conducted in the past. A pattern of abandonment and return to breeding sites was verified; around 30% of the sites were abandoned over a 10-year period, but the loss was largely compensated by establishment at new sites or return to sites used in the past. But almost one quarter of the sites were used in about 75% of the breeding seasons across a period of more than 30 years. Annual breeding success at these sites did not differ from that at the other, less frequently used sites. However, the most continuously used sites produce a larger total of young than other sites and are therefore important for long-term recruitment. They should be identified and prioritised for protection and management.

2020 ◽  
pp. 002087281988118
Author(s):  
Gaurav R Sinha ◽  
Lissette M Piedra

Social work has historically engaged in pioneering interventions to improve the financial well-being of people. India is an interesting case as it has the highest number of unbanked people on one side and numerous policy interventions on the other. Using systematic review and Gioia methodology, we analyzed 24 years of financial inclusion policies. Our analysis revealed that the efficacy of policies was impeded by flawed designs, as the policymakers preferred ‘quick fixes’ over long-term solutions. Our study highlights the need for learning from the past and organizing complex information in a way that helps policymakers in taking informed policy design decisions.


KronoScope ◽  
2004 ◽  
Vol 4 (2) ◽  
pp. 297-315 ◽  
Author(s):  
Barbara Adam

AbstractWe think of memories as being focused on the past. However, our ability to move freely in the temporal realm of past, present and future is far more complex and sophisticated than commonsense would suggest. In this paper I am concerned with our capacity to produce and extend ourselves into the far future, for example through nuclear power or the genetic modification of food, on the one hand, and our inability to know the potential, diverse and multiple outcomes of this technologically constituted futurity, on the other. I focus on this discrepancy in order to explore what conceptual tools are available to us to take account of long-term futures produced by the industrial way of life. And I identify some historical approaches to the future on the assumption that the past may well hold vital clues for today's dilemma, hence my proposal to engage in 'memory of futures'. I conclude by considering the potential of 'memory aids for the future' as a means to better encompass in contemporary concerns the long-term futures of our making.


2019 ◽  
Vol 8 ◽  
Author(s):  
Susan M Kenyon

Drawing on long-term ethnographic research in the Blue Nile town of Sennar, supported by archival and historical documentation, this article explores the history of Zar spirit possession in Sudan, and the light this throws on the interplay of religions over the past 150 years. Life history data supports the argument that contemporary Zar is grounded in forms and rituals derived from the ranks of the ninteenth-century Ottoman army, and these remain the basis of ritual events, even as they accommodate ongoing changes in this part of Africa. Many of these changes are linked to the dynamic interplay of Zar with forms of Islam, on the one hand, and Christianity, on the other. In the former colonial periods, political power resided with the British, and Khawaja (European) Christian Zar spirits are remembered as far more important. Today that authority in Zar has shifted to spirits of foreign Muslims and local holy men, on the one hand, and to subaltern Blacks, on the other. These speak to concerns of new generations of adepts even as changes in the larger political and religious landscapes continue to transform the context of Zar.


2009 ◽  
Vol 50 (2) ◽  
pp. 191-231 ◽  
Author(s):  
Alban D’Amours ◽  
Léandre Nadeau

Abstract This article has a two-fold purpose: first, to offer as complete an inventory aspossible of the literature written on the economics of housing, classifying thisliterature according to subject matter (in this sense, the article takes on theappearance of an annotated bibliography); and second, to take a hard look at thepresent state of economic theory in this field. The article is divided into the following six sections: 1) existing surveys;2) studies related to long-term cycles in residential construction; 3) theoriesexplaining short-term fluctuations; 4) verbal models; 5) econometric models;6) other studies. Some emphasis has been given to the authors' two principal conclusions. In theiropinion, the "residual" vision and the countercyclical hypothesis have not beenadequately tested in the past. Furthermore, the authors bring to light evidence,both theoretical and factual, which contradicts this theory (see Section 3). Then,in Section 5, the authors attempt to show how econometric models, except in the mostrecent papers, fail to take into account, adequately, the relationships between thehousing and mortgage markets and the builders. In addition, it is contended thatthese models are not truly representational of the whole sector, in that they areoften nothing more than simple demand or supply equations, or, even worse, neitherone nor the other.


2012 ◽  
Vol 26 (2) ◽  
pp. 181-185 ◽  
Author(s):  
M. Kirkham

Internationalization of soil physics from an American perspectiveUpon the seventy-fifth anniversary of the Soil Science Society of America in 2011, a session was held at its annual meeting to document how the field has changed over the years. I was asked to give the long-term perspective for soil physics. I surveyed soil-physics research published by the society over the past six years (2005-2011) and compared it with a review done in 1961 upon the twenty-fifth anniversary of the society. Of the 299 papers in my survey, 186 came from outside the USA (62% of the total). Twenty-nine countries were represented with the People's Republic of China having the most papers (27 papers). In the 1961 review, only five countries outside the USA were cited. My survey showed that 48 papers (16%) dealt with water, 35 (12%) with mechanical properties, 19 (6%) with aeration, 18 (6%) with solute transport, 14 (5%) with repellency, and 10 (3%) with temperature. Of the non-USA papers in the survey, 27% gave no source of funding and the other 73% usually cited funding by the government of the corresponding author. Of the USA papers, 47% cited no source of funding. The results showed that soil-physics research has become heavily international.


2000 ◽  
Vol 27 (6) ◽  
pp. 583 ◽  
Author(s):  
M. Giese ◽  
S. D. Goldsworthy ◽  
R. Gales ◽  
N. Brothers ◽  
J. Hamill

The long-term effects of oiling on the breeding success of rehabilitated oiled little penguins (Eudyptula minor) were examined over two consecutive breeding seasons following the Iron Baron oil spill in 1995. The commencement of egg laying was delayed among rehabilitated oiled penguins compared with non-oiled birds during the 1995/96 breeding season. During that season, hatching success (number of eggs hatched from those laid) was no different in nests containing rehabilitated oiled penguins than in those containing non-oiled birds, but overall egg success (number of pre-fledging chicks from the number of eggs laid) was significantly lower among rehabilitated oiled birds. This effect was predominant in nests containing a rehabilitated oiled female, where the probability of successfully fledging any chicks was 22% lower than in nests containing a non-oiled female. During the 1996/97 breeding season, there was no significant difference between either the hatching or egg success of rehabilitated oiled penguins and non-oiled birds. In both seasons, the pre-fledging masses of chicks from rehabilitated oiled penguins were significantly lower than those from non-oiled birds. The chicks of rehabilitated oiled penguins were therefore expected to have lower survival than chicks raised by non-oiled parents. Results indicate that oiling not only reduced the number of chicks raised by rehabilitated oiled penguins in the short term, but also decreased the quality of young produced for at least two seasons following the spill.


2018 ◽  
Vol 7 (3) ◽  
pp. 40-49 ◽  
Author(s):  
Marian Zaharia ◽  
Aniela Balacescu

Over the past two decades, Romania has had an alarming increase in the number of people who have left Romania to work in other countries, with major implications for most areas of economic and social life. The disparities between the eight development regions have led, on the one hand, to the recording of totally different net migration values and, on the other hand, a deepening disparity between development regions. One of the major areas affected by the phenomenon of migration was and is education, with implications on the level of education of the younger generation. This article examines the existence of stable long-term links between school drop-out and net migration in Romania over the period 2000-2016.


2020 ◽  
pp. 001946622096802
Author(s):  
Sarbajit Sengupta

This article attempts to construct an extremely rudimentary framework to argue that the long-term losses from the pandemic shock are likely to far exceed the short-term one. In the simple structure presented here, output depends on labour force, efficiency that is determined by past nutrition levels and capital accumulated from the past. The immediate effect of the pandemic is to lower the effective labour size, principally due to lockdowns to prevent or delay the spread of the pandemic. The other two factors cannot be affected. However, the decline in present output is likely to lower both the efficiency of labour and the future capital along with the labour supply in the future, thereby causing a greater impact on future output.


1987 ◽  
Vol 65 (10) ◽  
pp. 2430-2435 ◽  
Author(s):  
D. A. Boag ◽  
M. A. Schroeder

The number of spruce grouse (Falcipennis (Canachites) franklinii) present in the spring population on a 247-ha block of pine-dominated habitat in southwestern Alberta was counted annually over a 21-year period. During the first 5 years of this study, the population increased steadily from 7.3 to 16.6 grouse/100 ha. Subsequently, for a period of 11 years, numbers were relatively stable at higher densities (19.0–29.1 grouse/100 ha). During the last 5-year period, the population declined to levels lower than at the onset of the study (16.6–4.9 grouse/100 ha). Year to year fluctuations in the size of this population were considered in the light of two hypotheses put forward to explain such fluctuations (spacing behaviour and breeding success). We concluded that both hypotheses were needed to explain our observations. During those years when spring population size fell below the mean number of grouse recorded over the 21-year period (17.8/100 ha), there was some evidence that breeding success in one year may have influenced population size the following spring but we found no evidence that spacing behaviour was important in limiting numbers under these conditions. On the other hand, when the size of the spring population was greater than the mean there was no evidence that breeding success influenced changes in population size the following spring, but there was evidence that spacing behaviour was limiting recruitment. The long-term change in population size appeared to be tied to the status of the fire sere inhabited: maturation of the forest (principally an increase in the height) was accompanied by a decline in population size.


2021 ◽  
pp. 003802612110294
Author(s):  
Clément Colin

Depending on one’s socio-territorial contexts, age, and time spent residing in the same place, the spatial-temporal experience of belonging is lived differently. Within this framework, this article looks at perspectives of neighborhood belonging in long-term residents aged 65 years and older. Based on the narratives of 51 people from three neighborhoods of Valparaíso, Chile, who participated in the 2019 workshops and/or in-depth interviews, I identify different types of nostalgic senses of belonging; and examine the social and spatial conditions that influence their formation. From this empirical research, I argue that these belongings are based on daily practices that refer to the past neighborhood and that, at the same time, are embodied in their current materialities. The results show, on the one hand, the role of nostalgia in the formation of a belonging, from the past to the present; and, on the other, the influence of place in these experiences. From the above, this article contributes to the conceptualization of the material dimension of nostalgic belongings and their interrelationships among nostalgias, belongings, and changes in social and physical environments.


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