The Past and Present Distribution of Scheuchzeria Palustris L. in Europe

1965 ◽  
Vol 53 (2) ◽  
pp. 287 ◽  
Author(s):  
J. H. Tallis ◽  
H. J. B. Birks
Keyword(s):  
The Past ◽  
Present Distribution ◽  
Scheuchzeria Palustris

Colchicum autumnale (Colchicaceae) w okolicach Krakowa – dawne i obecne rozmieszczenie

2019 ◽  
pp. 15-27
Author(s):  
Magdalena Zarzyka-Ryszka
Keyword(s):  
Adjacent Area ◽  
Colchicum Autumnale ◽  
The Past ◽  
The North ◽  
North Eastern ◽  
New Localities ◽  
Present Distribution ◽  
The 19Th Century ◽  
North Eastern Part

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).

scholarly journals Stability of Asteroid Motions

1992 ◽  
Vol 152 ◽  
pp. 115-122
Author(s):  
Y. Kozai
Keyword(s):  
Dynamical Evolution ◽  
Secular Perturbations ◽  
The Past ◽  
Kirkwood Gaps ◽  
Present Distribution

In this paper the author presents evidences showing that for most of the asteroids the motions are stable in the sense that they never approach major planets very closely and explains about mechanisms to avoid very close approaches by investigating the variations due to the secular perturbations of the eccentricities as functions of the arguments of perihelion, particularly, for asteroids with high eccentricities and inclinations. It is believed that some kinds of dynamical evolution processes have made the asteroid motions stable. The author shows also that there were some kinds of collisions among asteroids in the past which produced families and present distribution of asteroids as there are very faint asteroids only near Kirkwood gaps.

Past and present distribution and abundance of the black-footed wallaby in the Warburton region of Western Australia

1992 ◽  
Vol 19 (6) ◽  
pp. 605 ◽  
Author(s):  
DJ Pearson
Keyword(s):  
Western Australia ◽  
Aboriginal People ◽  
Rock Outcrops ◽  
Management Intervention ◽  
The Past ◽  
Granite Outcrops ◽  
Close Proximity ◽  
Local Extinctions ◽  
Present Distribution

The black-footed rock-wallaby (Petrogale lateralis) was once widespread and abundant in rock-piles and ranges in the Warburton region of Western Australia. However, by the 1970s a major decline in its distribution and abundance was apparent. Ranges and rock outcrops were searched with local Aboriginal people to document the past and present distribution and abundance of the species and Aboriginal knowledge of its ecology. The journals of explorers, prospectors and surveyors were examined for records of rock-wallabies. Geologists, dingo trappers and other people who had worked in the region since 1930 were interviewed to document more recent sightings. Extant, small populations of rock-wallabies were located in six ranges, where they were inhabiting extensive gabbro rock-piles and rugged quartzite gullies, often in close proximity to permanent water. None of the granite outcrops visited had extant populations. Continuing local extinctions suggest that surviving populations are under threat and management intervention is required for their long term conservation.

An assessment of the past and present distribution status of the whale shark (Rhincodon typus)along the west coast of India

2016 ◽  
Author(s):  
P.V.R. Premjothi ◽  
B.C. Choudury ◽  
Rahul Kaul ◽  
S. Subburaman ◽  
Manoj Matwal ◽  
...  
Keyword(s):  
West Coast ◽  
Whale Shark ◽  
The West ◽  
Rhincodon Typus ◽  
West Coast Of India ◽  
The Past ◽  
Present Distribution

scholarly journals Lobaria pulmonaria (L.) Hoffm. in the southwestern Baltic – Kattegat area

2021 ◽  
Vol 58 ◽  
pp. 183-197
Author(s):  
Ulf Schiefelbein ◽  
Terkel Arnfred ◽  
Christian Dolnik ◽  
Patrick Neumann ◽  
Emilia Ossowska ◽  
...  
Keyword(s):  
Climatic Factors ◽  
Oak Forests ◽  
Air Humidity ◽  
Northern Germany ◽  
Lobaria Pulmonaria ◽  
The Past ◽  
Forestry Practices ◽  
Natural Factors ◽  
Present Distribution ◽  
Northwestern Poland

The past and present distribution of Lobaria pulmonaria in Denmark, northern Germany, northwestern Poland and nemoral parts of Skåne, Blekinge, southwesternmost Småland and southern Öland (Sweden) has been studied. Of 124 localities visited between 2015 and 2018, L. pulmonaria was confirmed at 64 sites, at each of which its habitat ecology and viability were investigated. It is almost extinct in Schleswig-Holstein, in southern Jutland, on the Danish Islands, in southwestern Skåne, in Mecklenburg-Vorpommern and in the western part of Pomerania. It has disappeared almost completely from areas where mesophytic forests form the potential natural vegetation. The commonest habitats for L. pulmonaria are species-poor acidic beech and species-poor oak forests, and the commonest substrates are trunks of beech, followed by oak. L. pulmonaria specimens on about two thirds of the colonized trees were in a healthy condition. The situation is worst in Schleswig-Holstein and on the Danish Islands, but best in Blekinge and central and northern Jutland. Recent distribution seems to be influenced by both anthropogenic (e.g. air pollution by sulphur dioxide and nitrogen and forestry practices) and natural factors (precipitation, temperature, air humidity), as well as unnatural climatic factors (global warming).

THE PAST AND PRESENT DISTRIBUTION AND STATUS OF THE CAPE VULTURE IN THE CAPE PROVINCE

Ostrich ◽  
1980 ◽  
Vol 51 (4) ◽  
pp. 230-250 ◽  
Author(s):  
A. F. Boshoff ◽  
C. J. Vernon
Keyword(s):  
The Past ◽  
Present Distribution

scholarly journals Different diversification histories in tropical and temperate lineages in the ascomycete subfamily Protoparmelioideae (Parmeliaceae)

MycoKeys ◽  
2018 ◽  
Vol 36 ◽  
pp. 1-19 ◽  
Author(s):  
Garima Singh ◽  
Francesco Dal Grande ◽  
Jan Schnitzler ◽  
Markus Pfenninger ◽  
Imke Schmitt
Keyword(s):  
Species Distributions ◽  
Divergence Times ◽  
Temporal Context ◽  
Evolutionary Processes ◽  
Climate Fluctuations ◽  
The Past ◽  
Divergence Dating ◽  
Present Distribution ◽  
Time Of Origin ◽  
Key Innovations

Background: Environment and geographic processes affect species’ distributions as well as evolutionary processes, such as clade diversification. Estimating the time of origin and diversification of organisms helps us understand how climate fluctuations in the past might have influenced the diversification and present distribution of species. Complementing divergence dating with character evolution could indicate how key innovations have facilitated the diversification of species.Methods: We estimated the divergence times within the newly recognised subfamily Protoparmelioideae (Ascomycota) using a multilocus dataset to assess the temporal context of diversification events. We reconstructed ancestral habitats and substrate using a species tree generated in *Beast.Results: We found that the diversification in Protoparmelioideae occurred during the Miocene and that the diversification events in the tropical cladeMaroninapredate those of the extratropicalProtoparmelia. Character reconstructions suggest that the ancestor of Protoparmelioideae was most probably a rock-dwelling lichen inhabiting temperate environments.Conclusions: Major diversification within the subtropical/tropical genusMaroninaoccurred between the Paleocene and Miocene whereas the diversifications within the montane, arctic/temperate genusProtoparmeliaoccurred much more recently, i.e. in the Miocene.

scholarly journals On the status of the scarce fritillary Euphydryas maturna (Lepidoptera: Nymphalidae) in Finland

2001 ◽  
Vol 12 (4) ◽  
Author(s):  
Niklas Wahlberg
Keyword(s):  
Forest Edges ◽  
Southeastern Part ◽  
The Past ◽  
Larval Host ◽  
The Status ◽  
Melampyrum Pratense ◽  
Present Distribution ◽  
Rocky Outcrops ◽  
The Moment ◽  
Made In

The scarce fritillary Euphydryas maturna (L.) is a highly endangered species of butterfly in several European countries. However, in Finland it occurs commonly in the southeastern part of the country and its distribution has remained stable over the past 40 years. The ecology of E. maturna has recently been studied in Finland. In this paper, I review these studies and show that the distribution of the species is tightly linked to its ecology, which differs substantially from the ecology of the same species in central Europe. In Finland, the main larval host plant is Melampyrum pratense (Orobanchaceae), which is common throughout Finland. Euphydryas maturna is restricted to south facing forest edges where the sharp ecotone provides a warm habitat. Larvae need warm microhabitats to be able to grow fast in the spring. Natural forest edges are formed by rocky outcrops, which are common in SE Finland. The distribution of E. maturna coincides with the area where rocky outcrops are common. I suggest that the presence of the granite bedrock close to the surface of the ground largely explains the present distribution of E. maturna in Finland. I also note that the species benefits from clearcuts made in the forests and conclude that E. maturna is not threatened in Finland at the moment.

Potorus tridactylus (Kerr) (Marsupialia : Macropodidae): its Distribution, Status and Habitat Preferences in Victoria

1981 ◽  
Vol 8 (2) ◽  
pp. 285 ◽  
Author(s):  
JH Seebeck
Keyword(s):  
Land Management ◽  
Management Practices ◽  
Habitat Preferences ◽  
The Past ◽  
The Status ◽  
Present Distribution

The past and present distribution of P. tridactylus in Victoria is described and mapped. Six discrete regional populations are identified. For each region the status of the species is assessed, revealing relative security in all but The Grampians Region. The species' habitat preferences are assessed in terms of vegetation, soils and climate. It is adduced from all available evidence that, overall, the species is not endangered; provided present land management practices are not drastically altered.

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