scholarly journals Habitat suitability for Brown bear (Ursus arctos) in the south-eastern Iberian Range

Ecosistemas ◽  
2020 ◽  
Vol 29 (2) ◽  
Author(s):  
José María Rey Benayas ◽  
Laura Fraile Real ◽  
Rocío de la Torre Ceijas ◽  
Néstor Fernández
Keyword(s):  
Habitat Suitability ◽  
Ursus Arctos ◽  
Brown Bear ◽  
The South ◽  
South Eastern ◽  
Iberian Range

scholarly journals FEATURES OF BIOLOGYOF THE BROWN BEAR (URSUS ARCTOS L.)IN THE SOUTH-EAST OF WESTERN SIBERIA (TOMSK REGION)

2018 ◽  
pp. 69-73
Author(s):  
N. V. Ivanova ◽  
O. Y. Tutеnkov
Keyword(s):  
Ursus Arctos ◽  
Western Siberia ◽  
Brown Bear ◽  
Forest Stand ◽  
Coniferous Forests ◽  
The South ◽  
Forest Roads ◽  
Large Trees ◽  
Tomsk Region

On the territory of the south-east of Western Siberia (Tomsk Region), the features of the species biology are analyzed: abundance, dendroactivity, biotopic confinement, the device of a dens. Scuffs and scraps of bark left by the bear are marked on fir - 80 % and cedar -20 %. Bears were marked mainly by trees that are in the edge of the forest stand along the fringes, forest roads, winter roads and quarter walkways, animal paths. Traces of bear activity located at a height of 156 cm to 242 cm indicate the manifestation of food, comfortable and marking dendroactivity. The burlogs are confined to hard-to-reach places - forest heaps, cuttings, found in coniferous forests eaten by silkworms, on old garbage. The bergs are located beneath the roots of large trees: birches, cedar, less often under fallen trees, ovaries and fallen trees of cedar, aspen. The exit from the den is mainly directed to the south. The internal dimensions of the den often vary: length from 150 to 350 cm, height - 80-215 cm, width - 130-300 cm. In the litter - grass (33.3 %), moss (21.6 %), leaves (17, 6 %), branches (9.8 %), needles (7.8 %).

scholarly journals NEW DATA ON NUTRITION OF BROWN BEAR (URSUS ARCTOS L.) OF KARELIA AND THE SOUTH OF THE KOLA PENINSULA

2016 ◽  
pp. 114 ◽  
Author(s):  
Константин Феликсович Тирронен ◽  
Данила Владимирович Панченко ◽  
Анастасия Сергеевна Кузнецова ◽  
Konstantin Tirronen ◽  
Danila Panchenko ◽  
...  
Keyword(s):  
Kola Peninsula ◽  
Ursus Arctos ◽  
Brown Bear ◽  
The South

Ants: A food source sought by Slovenian brown bears (Ursus arctos)?

2003 ◽  
Vol 81 (12) ◽  
pp. 1996-2005 ◽  
Author(s):  
C Große ◽  
P Kaczensky ◽  
F Knauer
Keyword(s):  
Habitat Suitability ◽  
Food Source ◽  
Ursus Arctos ◽  
Brown Bear ◽  
Dry Mass ◽  
Artificial Feeding ◽  
Frequency Of Occurrence ◽  
Brown Bears ◽  
Ant Colonies ◽  
Feeding Sites

In the heavily managed boreal forest of Scandinavia, ants, especially large colonies of red forest ants (Formica spp.), are abundant and brown bears (Ursus arctos) intensively feed on them. In contrast, the beech (Fagus sylvatica) forests of Slovenia provide only suboptimal habitat for ants and large ant colonies are virtually absent. To quantify how much ant use by brown bears is a matter of availability or preference, we quantified ant availability, species composition, and ant use. The estimated biomass of ants available to brown bears was very low in Slovenia compared with those in Sweden, averaging 135 vs. 9600 g/ha, respectively. Nevertheless, the frequency of occurrence of ants in Slovenian brown bear scats was high, averaging 85% and accounting for 25% of the ingested dry mass during the summer, which was nearly as much as their frequency of occurrence in Swedish brown bear scats during the summer. Although brown bears in Slovenia had year-round access to artificial feeding sites and the availability of ants is only about 1% of the biomass found in Sweden, they consumed about 50% of the quantity of ants compared with the brown bears in Sweden. Our results show that ants are an important and sought-after food source for brown bears in Slovenia, and the occurrence of ants should be considered in habitat-suitability models.

scholarly journals Identifying key denning habitat to conserve brown bear (Ursus arctos) in Croatia

2017 ◽  
Vol 44 (4) ◽  
pp. 309 ◽  
Author(s):  
A. Whiteman ◽  
G. Passoni ◽  
J. M. Rowcliffe ◽  
D. Ugarković ◽  
J. Kusak ◽  
...  
Keyword(s):  
Habitat Suitability ◽  
Ursus Arctos ◽  
Brown Bear ◽  
Structural Elements ◽  
Rugged Terrain ◽  
Anthropogenic Habitat ◽  
Management Plans ◽  
Core Areas ◽  
Site Disturbance ◽  
Habitat Variables

Context The preservation of denning habitat is paramount to the recovery of threatened bear populations because of the effect that den site disturbance can have on cub mortality. Understanding habitat suitability for denning can allow management efforts to be directed towards the regions where conservation interventions would be most effective. Aim We sought to identify the environmental and anthropogenic habitat variables associated with the presence of Eurasian brown bear (Ursus arctos) den sites in Croatia. Based on these associations, in order to inform future conservation decisions, we also sought to identify regions of high suitability for denning across Croatia. Methods Using the locations of 91 dens inhabited by bears between 1982 and 2011, we opted for the presence-only modelling option in software Maxent to determine the most important predictors of den presence, and thus predict the distribution of high-value denning habitat across Croatia. Key results We found that structural elements were the most important predictors, with ruggedness and elevation both relating positively to den presence. However, distance to nearest settlement was also positively associated with den presence. Conclusion We determine that there is considerable denning habitat value in areas with high and rugged terrain as well as areas with limited human activity. We suspect that high and rugged terrain contains a greater concentration of the karstic formations used for denning than lower-lying regions. Implications Our study presents the first habitat suitability model for brown bears in Croatia, and identifies core areas suitable for denning both within and outside the species’ current range. As such, it provides useful evidence for conservation decision making and the development of scientifically-based management plans. Our results also support the need for finer spatial scale studies that can reveal specific denning preferences of subpopulations.

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