scholarly journals The role of macrophytes in the study of north-eastern Ladoga small island lakes evolution during the Holocene

Author(s):  
T. Gazizova ◽  
◽  
T. Sapelko ◽  
N. Korneenkova ◽  
◽  
...  
Author(s):  
Magdalena Zarzyka-Ryszka

The paper describes the past and present distribution of Colchicum autumnale in the vicinity of Cracow, highlights the role of Stanisław Dembosz (who published the first locality of C. autumnale near Igołomia in 1841). Gives information about the occurrence of C. autumnale in Krzeszowice in the 19th century (reported by Bronisław Gustawicz), presents new localities noted in 2012–2014 in meadows in the north-eastern part of the Puszcza Niepołomicka forest and adjacent area (between the Vistula and Raba rivers), and gives a locality found in Cracow in 2005 (no longer extant).


2019 ◽  
Vol 128 (3) ◽  
pp. 583-591
Author(s):  
Leo Joseph ◽  
Alex Drew ◽  
Ian J Mason ◽  
Jeffrey L Peters

Abstract We reassessed whether two parapatric non-sister Australian honeyeater species (Aves: Meliphagidae), varied and mangrove honeyeaters (Gavicalis versicolor and G. fasciogularis, respectively), that diverged from a common ancestor c. 2.5 Mya intergrade in the Townsville area of north-eastern Queensland. Consistent with a previous specimen-based study, by using genomics methods we show one-way gene flow for autosomal but not Z-linked markers from varied into mangrove honeyeaters. Introgression barely extends south of the area of parapatry in and around the city of Townsville. While demonstrating the long-term porosity of species boundaries over several million years, our data also suggest a clear role of sex chromosomes in maintaining reproductive isolation.


2011 ◽  
Vol 4 ◽  
pp. 102-111 ◽  
Author(s):  
Surjya Kumar Saikia ◽  
Debangshu Narayan Das

The waterlogged terrace wet rice-fields of Apatani Plateau located at an altitude of 1500msl in Arunachal Pradesh of the north eastern India are stocked with fish Common carp (Cyprinus carpio L) for several decades. The fishes are not fed with supplementary feeds because of the rich organic nature of the rice-fields. The study on water and soil of these fields revealed a strong co-relation to such organic nature. The wet rice-fish integrated fields exhibited the characters of shallow wet ecosystems. The water canals traversed through the rice fields were found inundated with water up to 50m showing the nature of Deep Water Rice fields (DWR) at least for one month. Significant (p<0.001) variations of water were observed for dissolved oxygen (DO) and carbon dioxide (CO2) to diurnal and seasonal changes. Alkalinity of the fields intends to play a role towards its productivity which is otherwise played by DO in other aquatic systems. Soil nitrogen reflected a gradual increasing trend of organic nature. Role of periphyton may not be ignored to the high phosphorus level of the soil at later flood phases in these fields. Key words: Rice-fish; aquatic ecosystem; organic practice; plankton; periphyton DOI: 10.3126/jowe.v4i0.2585Journal of Wetlands Ecology, (2010) Vol. 4, pp 102-111


2020 ◽  
pp. 7-32
Author(s):  
Katarzyna Kulczyńska ◽  
Natalia Borowicz ◽  
Karolina Piwnicka-Wdowikowska

Morasko University Campus in Poznań – origin, spatial and functional structure, transport solutions The purpose of the paper is to characterize the most recently created part of the Adam Mickiewicz University – the Morasko Campus. The paper consists of three parts. The first concerns the origins and development of the campus. The second part presents its spatial and functional structure on the basis of a field inventory, while the third one – campus transport solutions based on a survey conducted among students. The history of the campus located in the northern, peripheral part of the city began with laying the foundation act and the cornerstone in 1977. The agricultural role of this area, dominant until the 1980s, has been replaced with new functions, mainly academic and scientific ones. The first university buildings were commissioned in the 1990s, and the construction boom began after 2000. A total of nine faculties (out of 21 existing) are housed in eight buildings in the campus, including exact and natural sciences, as well as a part of social sciences and humanities. To this day, neither student dormitories nor accommodation for PhD students have been constructed (although they are likely to be built), which would emphasize the academic function of the campus. The campus also comprises areas with recreational, sports, residential and other service functions (e.g. catering, beauty, hairdressing, and commercial services), which are complemented by areas that serve transport functions. Location in the northern periphery of the city, and above all the railway line for freight (the northern bypass of Poznań) separating the city from the campus, makes transport to this part of the city limited. The results of the survey revealed a lack of a safe bicycle path between the western and eastern part of the campus, insufficient number of parking places for motorists, a lack of paved roads from the north and west, only three narrow access roads for car commuters, and difficult access by public transport to the eastern and north-eastern parts. In the latter case, the planned extension of the tram line towards Umultowo after the year 2022 is expected to solve the problem. Zarys treści: Celem opracowania jest charakterystyka najmłodszej przestrzeni Uniwersytetu im. Adama Mickiewicza – Kampusu Morasko. Opracowanie składa się z trzech zasadniczych części. Pierwsza część artykułu dotyczy genezy powstania i rozbudowy miasteczka uniwersyteckiego. W drugiej części przedstawiono strukturę przestrzenno-funkcjonalną kampusu w oparciu o inwentaryzację terenową, w trzeciej zaś obsługę transportową na podstawie badań ankietowych przeprowadzonych wśród studentów. Historia położonego w północnej, peryferyjnej części miasta kampusu rozpoczęła się od wmurowania aktu erekcyjnego i kamienia węgielnego w 1977 r. Dominująca do lat 80. XX w. funkcja rolnicza tego obszaru została zastąpiona przez nowe funkcje, głównie akademickie i naukowe. Pierwsze budynki dydaktyczne oddano do użytku dopiero w latach 90. ubiegłego wieku, a boom budowlany rozpoczął się po roku 2000. Swoją siedzibę znalazły tutaj nauki ścisłe i przyrodnicze, a także część nauk społecznych i humanistycznych, w sumie dziewięć wydziałów (na 21 istniejących) w ośmiu budynkach. Do dzisiaj nie wybudowano akademików czy domu doktoranta (choć istnieją realne szanse na ich powstanie), co podkreśliłoby funkcję akademicką kampusu. W strukturze kampusu wyróżnia się ponadto obszary o funkcjach rekreacyjnych, rekreacyjno-sportowych, mieszkaniowych i innych o charakterze usługowym (np. usługi gastronomiczne, kosmetyczne, fryzjerskie, handel), których uzupełnieniem są obszary o funkcjach komunikacyjnych. Położenie na północnych peryferiach miasta, a przede wszystkim linia kolejowa dla przewozów towarowych (północna obwodnica Poznania) oddzielająca miasto od kampusu sprawiają, że obsługa transportowa tej części miasta jest ograniczona. Wyniki badań ankietowych wskazują na brak bezpiecznej drogi rowerowej między zachodnią i północno-wschodnią częścią kampusu, niewystarczającą liczbę miejsc parkingowych dla zmotoryzowanych, brak utwardzonych dróg od strony północnej i zachodniej, zaledwie trzy wąskie wjazdy na kampus dla dojeżdżających samochodem czy utrudniony dojazd komunikacją publiczną do części wschodniej i północno-wschodniej. W tym ostatnim przypadku rozwiązaniem ma być planowana po 2022 r. rozbudowa linii tramwajowej w kierunku Umultowa.


Starinar ◽  
2016 ◽  
pp. 173-191
Author(s):  
Aleksandar Kapuran ◽  
Dragana Zivkovic ◽  
Nada Strbac

The last three years of archaeological investigations at the site Ru`ana in Banjsko Polje, in the immediate vicinity of Bor, have provided new evidence regarding the role of non-ferrous metallurgy in the economy of the prehistoric communities of north-eastern Serbia. The remains of metallurgical furnaces and a large amount of metallic slags at two neighbouring sites in the mentioned settlement reveal that locations with many installations for the thermal processing of copper ore existed in the Bronze Age. We believe, judging by the finds of material culture, that metallurgical activities in this area also continued into the Iron Age and, possibly, into the 4th century AD.


Parasitology ◽  
2010 ◽  
Vol 137 (7) ◽  
pp. 1069-1077 ◽  
Author(s):  
RENATA WELC-FALĘCIAK ◽  
ANNA BAJER ◽  
JERZY M. BEHNKE ◽  
EDWARD SIŃSKI

SUMMARYPrevalence and abundance ofBartonellaspp. infections were studied over a 3-year period in woodland and grassland rodents in North-Eastern Poland. Prevalence of bacterial infections was similar in the two rodent communities, with one leading host species in each habitat (46·3% inApodemus flavicollisversus 29·1% inMyodes glareolusin forest, or 36·9% inMicrotus arvalisversus 13·7% inMi. oeconomusin grassland). Prevalence/abundance of infections varied markedly across the 3 years with 2006 being the year of highest prevalence and abundance. Infections were more common during autumn months inMy. glareolusandA. flavicollis, and in juvenile and young adult (age classes 1 and 2)My. glareolusandMi. oeconomusthan in adults (age class 3). Higher prevalence and abundance ofBartonellainfections were found in maleA. flavicollisin comparison to females. These data are discussed in relation to the parasite genotypes identified in this region and with respect to the role of various ecological factors influencingBartonellaspp. infections in naturally infected host populations.


2022 ◽  
pp. 101852912110652
Author(s):  
Devpriya Sarkar

In 2015, Sikkim, a North-Eastern state of India, achieved the state of being fully organic. Later, states like Nagaland, Mizoram, Meghalaya, Goa and Kerala have declared their intentions to be fully organic. In Nagaland, more than 47% of the population is engaged in agriculture and entirely dependent on the traditional mode of farming and has used organic manure like cattle dung, dried leaves-litter and crop residues for enhancing the capacity of soil from time immemorial. Also, studies have shown that the state of Nagaland has negligible use of inorganic supplements in their fields. Thus, Nagaland has a high potential to be converted into an organic state without making any significant shifts in their existing farming practices. Shifting cultivation, locally known as Jhum-kheti, is one of the oldest forms of the agricultural process in practice in Nagaland. However, some studies regard Jhum cultivation as harmful to the environment, but there is a scope to reinvent this farming method and move towards a more sustainable form of agriculture there. This study explores the relation between traditional farming and organic farming and the benefits of state-induced organic farming methods and their effects on the farmers of Nagaland. A survey was carried out in the Mokokchung district of Nagaland to understand the role of farmers in attaining sustainability.


2017 ◽  
pp. 99-125 ◽  
Author(s):  
Dan Lawrence ◽  
Tony J. Wilkinson

This chapter investigates the archaeological landscapes of the frontiers of the Sasanian Empire. Drawing on evidence from current and archived archaeological surveys, in combination with high-resolution remote sensing datasets such as CORONA spy photography, we compare the organisation of settlements and defensive structures of the Sasanian frontier zones in response to a variety of external pressures. These varied from the Roman Empire in the west to less centralised entities, including nomadic groups, in the south-west and north-east. Following a general discussion of the multiple manifestations of Sasanian frontiers drawn from southern Mesopotamia (Iraq), northern Syria and north-eastern Iran, the main focus of the chapter is on the complex frontier landscape of the southern Caucasus, particularly the area of modern Azerbaijan, Georgia and Daghestan. We discuss the role of linear barriers, including the Gorgan Wall in north-eastern Iran and the Ghilghilchay and Derbent Walls in the Caucasus, irrigation systems, and alignments of fortifications and settlements in shaping their local landscapes. By placing the archaeological remains of the Sasanian Empire in a wider context we are able to examine the relationships between military installations, settlement patterns, infrastructure and geographical features such as mountain ranges and rivers. Comparing the different case studies allows us to conclude with some general statements on the nature of Sasanian power in the frontier territories of the empire.


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