Long term vegetation dynamics and recent human activity in the north-east Patagonian Andes, Argentina

2012 ◽  
Vol 279-280 ◽  
pp. 149
Author(s):  
Sonia Fontana
Fire ◽  
2021 ◽  
Vol 4 (4) ◽  
pp. 92
Author(s):  
Panteleimon Xofis ◽  
Peter G. Buckley ◽  
Ioannis Takos ◽  
Jonathan Mitchley

Fire is an ecological and disturbance factor with a significant historical role in shaping the landscape of fire-prone environments. Despite the large amount of literature regarding post-fire vegetation dynamics, the north-east Mediterranean region is rather underrepresented in the literature. Studies that refer to the early post fire years and long term research are rather scarce. The current study is conducted in the socially and geographically isolated peninsula of Mount Athos (Holly Mountain) in northern Greece, and it studies vegetation dynamics over a period of 30 years since the last fire. Field data were collected 11 years since the event and were used to identify the present plant communities in the area, using TWINSPAN, and the factors affecting their distribution using CART. Four Landsat (TM, ETM, OLI) images are employed for the calculation of NDVI, which was found effective in detecting the intercommunity variation in the study area, and it is used for long term monitoring. The study includes four communities, from maquis to forest which are common in the Mediterranean region covering a wide altitudinal range. The results suggest that fire affects the various communities in a different way and their recovery differs significantly. While forest communities recover quickly after fire, maintaining their composition and structure, the maquis communities may need several years before reaching the pre-fire characteristics. The dry climatic conditions of the study area are probably the reason for the slow recovery of the most fire prone communities. Given that climate change is expected to make the conditions even drier in the region, studies like this emphasize the need to adopt measures for controlling wildfires and preventing ecosystem degradation.


2018 ◽  
pp. 149-154

Vera Antonovna Martynenko (17.02.1936–06.01.2018) — famous specialist in the field of studying vascular plant flora and vegetation of the Far North, the Honored worker of the Komi Republic (2006), The Komi Republic State Scientific Award winner (2000). She was born in the town Likhoslavl of the Kali­nin (Tver) region. In 1959, Vera Antonovna graduated from the faculty of soil and biology of the Leningrad State University and then moved to the Komi Branch of USSR Academy of Science (Syktyvkar). From 1969 to 1973 she passed correspondence postgraduate courses of the Komi Branch of USSR Academy of ­Science. In 1974, she received the degree of candidate of biology (PhD) by the theme «Comparative analysis of the boreal flora at the Northeast European USSR» in the Botanical Institute (St. Petersburg). In 1996, Vera Antonovna received the degree of doctor of biology in the Institute of plant and animal ecology (Ekaterinburg) «Flora of the northern and mid subzones of the taiga of the European North-East». The study and conservation of species and coenotical diversity of the plant world, namely the vascular plants flora of the Komi Republic and revealing its transformation under the anthropogenic influence, was in the field of V. A. Martynenko’ scientific interests. She made great contribution to the study of the Komi Republic meadow flora and the pool of medi­cinal plants. She performed inventorying and mapping the meadows of several agricultural enterprises of the Republic, revealed the species composition and places for harvesting medicinal plants and studied their productivity in the natural flora of the boreal zone. The results of her long-term studies were used for making the NPA system and the Red Book of the Komi Republic (1998 and 2009). Vera Antonovna participated in the research of the influence of placer gold mining and oil development on the natural ecosystems of the North, and developed the method of long-term monitoring of plant cover. Results of these works are of high practical value. V. A. Martynenko is an author and coauthor of more than 130 scientific publications. The most important jnes are «Flora of Northeast European USSR» (1974, 1976, and 1977), «Floristic composition of fodder lands of the Northeast Europe» (1989), «The forests of the Komi Republic» (1999), «Forestry of forest resources of the Komi Republic» (2000), «The list of flora of the Yugyd va national park» (2003), «The guide for vascular plants of the Syktyvkar and its vicinities» (2005), «Vascular plants of the Komi Republic» (2008), and «Resources of the natural flora of the Komi Republic» (2014). She also was an author of «Encyclopedia of the Komi Republic» (1997, 1999, and 2000), «Historical and cultural atlas of the Komi Republic» (1997), «Atlas of the Komi Republic» (2001, 2011). V. A. Martynenko made a great contribution to the development of the botanical investigations in the North. Since 1982, during more than 10 years, she was the head of the Department of the Institute of Biology. Three Ph. D. theses have been completed under her leadership. Many years, she worked actively in the Dissertation Council of the Institute of biology Komi Scientific Centre UrB RAS.  The death of Vera Antonovna Martynenko is a heavy and irretrievable loss for the staff of the Institute of Biology. The memory of Vera Antonovna will live in her numerous scientific works, the hearts of students and colleagues.


2017 ◽  
Vol 37 (11-12) ◽  
pp. 655-666 ◽  
Author(s):  
Jon Warren

Purpose The purpose of this paper is to argue that the application of social policy in the North East of England is often characterised by tension and conflict. The agencies and professionals charged with implementation of Westminster driven policies constantly seek to deploy their knowledge of local conditions in order to make them both practical and palatable. Design/methodology/approach This paper examines the region via established literature from history, geography, sociology and social policy. The paper gives illustrations via empirical work which has evaluated initiatives to improve the health of long term health-related benefit recipients and to sustain individuals in employment in the region. Findings Central to the paper’s argument is the notion of “biographies of place”. The core of this idea is that places have biographies in the same way as individuals and possess specific identities. These biographies have been shaped by the intersections between environment, history, culture and economic and social policy. The paper identifies the region’s economic development, subsequent decline and the alliance of labour politics and industrial employers around a common consensus that sought economic prosperity and social progress via a vision of “modernisation” as a key component of this biography. Originality/value The paper argues that an appreciation of these spatial biographies can result in innovative and more effective social policy interventions with the potential to address issues that affect entire localities.


Author(s):  
Kaholi Zhimomi

The north-east has a distinct regional identity, as the land of seven sisters, Assam, Arunachal Pradesh, Meghalaya, Manipur, Mizoram, Nagaland, Tripura and Sikkim; and yet, has been absorbed into the social, cultural and political scheme of the secular nation since independence. The identity politics resulted in dissatisfaction on the part of the indigenous people, which generated long-term military violence in Northeast India. Today, disempowerment among indigenous groups is enormous. For early missionaries, conversion to Christianity also entailed adoption of the Western way of life. Most of the missionaries in Northeast India were American or Welsh among the Protestants and German, Spanish or Italian among the Catholics. Despite exploitation by colonialists that attempted to replace indigenous customs, revivals paved the way for renaissance for those customs. Today, Christianity is the major religion in the states of Nagaland, Mizoram and Meghalaya, with significant growth of indigenous leaders, both secular and religious. Furthermore, there is a rapid growth of educated young tribals who are qualified administrators, educators, academicians, politicians and theologians. With the effects of globalization and modernisation, Christianity must not be assumed to be an agent of acculturation but an agent that helped in the metamorphosis of indigenous norms into authentic tradition.


Author(s):  
Dag Vongraven ◽  
Anna Bisther

Studies in the Pacific have identified distinct killer whale ecotypes that are either specialized mammal- or fish-eaters. The different types have developed hunting strategies that would suggest specialization could be more advantageous than generalism. However, it has been suggested, based on long-term dietary markers of tooth wear and stable isotope values, that lineages in the North Atlantic are generalist, but with individual variation in the proportion of prey types consumed. Here, we present the results of ten years of observational and photo-identification data of a population of killer whales that follows the Norwegian spring-spawning stock of Atlantic herring. Although the whales were predominantly observed while feeding upon herring, one pod of herring-eating whales was also observed interacting with seals. This supports the hypothesis based on the long-term markers, of a degree of specialization, with a small number of groups persistently feeding upon mammals, but switching between herring and seals. We further investigated this prey switching by conducting playbacks of herring-eating killer whale sounds to harbour seals at haul-out sites on the herring spawning grounds. We recorded changes in behaviour consistent with an anti-predator response, suggesting the seals perceived the herring-eating killer whales as a potential predatory threat and had not habituated to their calls. This could be due to the risk of herring-eating killer whales switching to mammalian prey, or the difficulty of discriminating between killer whale pods due to the large population size and number of killer whale call dialects in this population, or a combination of both.


Stroke ◽  
2014 ◽  
Vol 45 (11) ◽  
pp. 3389-3394 ◽  
Author(s):  
Tristan D. Gloede ◽  
Sarah M. Halbach ◽  
Amanda G. Thrift ◽  
Helen M. Dewey ◽  
Holger Pfaff ◽  
...  

2014 ◽  
Vol 43 (2) ◽  
pp. 311-330 ◽  
Author(s):  
KAYLEIGH GARTHWAITE ◽  
CLARE BAMBRA ◽  
JONATHAN WARREN ◽  
ADETAYO KASIM ◽  
GRAEME GREIG

AbstractThe UK social security safety net for those who are out of work due to ill health or disability has experienced significant change, most notably the abolition of Incapacity Benefit (IB) and the introduction of Employment and Support Allowance (ESA). These changes have been underpinned by the assumption that many recipients are not sufficiently sick or disabled to ‘deserve’ welfare benefits – claims that have been made in the absence of empirical data on the health of recipients. Employing a unique longitudinal and mixed-methods approach, this paper explores the health of a cohort of 229 long-term IB recipients in the North East of England over an eighteen-month period, during a time of significant changes to the UK welfare state. In-depth interviews with twenty-five of the survey cohort are also presented to illustrate the lived experiences of recipients. Contributing to debates surrounding the conceptualisation of work-readiness for sick and disabled people, findings indicate IB recipients had significantly worse health than the general population, with little change in their health state over the eighteen-month study period. Qualitative data reinforced the constancy of ill health for IB recipients. Finally, the paper discusses the implications for social policy, noting how the changing nature of administrative definitions and redefinitions of illness and capacity to work can impact upon the lives of sick and disabled people.


Sign in / Sign up

Export Citation Format

Share Document