Examination of increased annual range of a Tana mangabey (Cercocebus galeritus) group

2005 ◽  
Vol 128 (2) ◽  
pp. 381-388 ◽  
Author(s):  
Julie Wieczkowski
Keyword(s):  
Annual Range ◽  
Cercocebus Galeritus ◽  
Tana Mangabey

scholarly journals Endemic Juniperus Montane Species Facing Extinction Risk under Climate Change in Southwest China: Integrative Approach for Conservation Assessment and Prioritization

Biology ◽  
2021 ◽  
Vol 10 (1) ◽  
pp. 63
Author(s):  
Mohammed A. Dakhil ◽  
Marwa Waseem A. Halmy ◽  
Walaa A. Hassan ◽  
Ali El-Keblawy ◽  
Kaiwen Pan ◽  
...  
Keyword(s):  
Climate Change ◽  
Potential Distribution ◽  
Extinction Risk ◽  
In Situ Conservation ◽  
Integrative Approach ◽  
Conservation Assessment ◽  
Distribution Models ◽  
Area Of Occupancy ◽  
Annual Range ◽  
The Impact

Climate change is an important driver of biodiversity loss and extinction of endemic montane species. In China, three endemic Juniperus spp. (Juniperuspingii var. pingii, J.tibetica, and J.komarovii) are threatened and subjected to the risk of extinction. This study aimed to predict the potential distribution of these three Juniperus species under climate change and dispersal scenarios, to identify critical drivers explaining their potential distributions, to assess the extinction risk by estimating the loss percentage in their area of occupancy (AOO), and to identify priority areas for their conservation in China. We used ensemble modeling to evaluate the impact of climate change and project AOO. Our results revealed that the projected AOOs followed a similar trend in the three Juniperus species, which predicted an entire loss of their suitable habitats under both climate and dispersal scenarios. Temperature annual range and isothermality were the most critical key variables explaining the potential distribution of these three Juniperus species; they contribute by 16–56.1% and 20.4–38.3%, respectively. Accounting for the use of different thresholds provides a balanced approach for species distribution models’ applications in conservation assessment when the goal is to assess potential climatic suitability in new geographical areas. Therefore, south Sichuan and north Yunnan could be considered important priority conservation areas for in situ conservation and search for unknown populations of these three Juniperus species.

Habitat selection and range size of grass snakes Natrix natrix in an agricultural landscape in southern England

2009 ◽  
Vol 30 (3) ◽  
pp. 379-388 ◽  
Author(s):  
Christopher Reading ◽  
Gabriela Jofré
Keyword(s):  
Agricultural Landscape ◽  
Habitat Preferences ◽  
Range Size ◽  
Southern England ◽  
Natrix Natrix ◽  
Deciduous Woodland ◽  
Annual Range ◽  
Close Proximity ◽  
Habitat Boundaries ◽  
Size Estimates

AbstractThe range sizes and habitat preferences of nine adult European grass snakes (Natrix natrix) were determined from radio-tracking data obtained within a landscape of mixed deciduous woodland and pastoral fields in southern England. These data were analysed using RANGES7v0.81 software. Concave polygons resulted in overall individual range size estimates that varied between 0.18-9.41 ha. However, for individuals that were radio-tracked for more than one season, annual range size estimates ranged between 1.29 ha and 3.56 ha and some snakes shifted their range between seasons. Grass snakes showed a strong preference for habitat boundaries and interfaces and an avoidance of woodland, and fields that were used for grazing. The attributes common to habitats that snakes preferred were a combination of basking site availability and a close proximity to relatively dense vegetation that offered potential protection from predators. The attributes common to habitats that snakes avoided were a lack of basking sites in woodland, and cover, in fields. Grass snakes selected banks as hibernation sites, the majority of which were within woodland.

scholarly journals Climate change drives mountain butterflies towards the summits

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Dennis Rödder ◽  
Thomas Schmitt ◽  
Patrick Gros ◽  
Werner Ulrich ◽  
Jan Christian Habel
Keyword(s):  
Climate Change ◽  
Life History ◽  
Climate Warming ◽  
Environmental Changes ◽  
Range Shifts ◽  
Solar Irradiation ◽  
High Mountain ◽  
Detailed Knowledge ◽  
Annual Range

AbstractClimate change impacts biodiversity and is driving range shifts of species and populations across the globe. To understand the effects of climate warming on biota, long-term observations of the occurrence of species and detailed knowledge on their ecology and life-history is crucial. Mountain species particularly suffer under climate warming and often respond to environmental changes by altitudinal range shifts. We assessed long-term distribution trends of mountain butterflies across the eastern Alps and calculated species’ specific annual range shifts based on field observations and species distribution models, counterbalancing the potential drawbacks of both approaches. We also compiled details on the ecology, behaviour and life-history, and the climate niche of each species assessed. We found that the highest altitudinal maxima were observed recently in the majority of cases, while the lowest altitudes of observations were recorded before 1980. Mobile and generalist species with a broad ecological amplitude tended to move uphill more than specialist and sedentary species. As main drivers we identified climatic conditions and topographic variables, such as insolation and solar irradiation. This study provides important evidence for responses of high mountain taxa to rapid climate change. Our study underlines the advantage of combining historical surveys and museum collection data with cutting-edge analyses.

scholarly journals Discussion of meteorolo­gical observations in India at various heights

1851 ◽  
Vol 5 ◽  
pp. 933-936
Keyword(s):  
Sea Level ◽  
Maximum Pressure ◽  
Daily Range ◽  
Diurnal Range ◽  
Annual Range ◽  
The Subject ◽  
Meteorological Observations ◽  
Extended Area ◽  
One Year ◽  
Board Ship

The author adverts to a former paper “On the Meteorolog of the Deccan,” published in the Philosophical Transactions for 1835, and after referring to the conclusions at which he arrived in that communication, states that, in the discussion of the meteorological observations which form the subject of the present paper, and which were made over a very extended area, at different heights, some being hourly and running through several years at the same station, it is very satisfactory to find that they fully establish the accuracy of the former deductions. He remarks that, as some of the obser­vations now discussed were hourly records continued through con­siderable periods of time, an opportunity has been afforded of in­vestigating abnormal conditions, which the former limited number of diurnal observations did not permit; and gives the following review of what appears to be normal and abnormal conditions. The annual and daily range of the barometer diminishes from the sea-level up to the greatest height observed, 8640 feet at Dodabetta, from a mean annual and mean daily range at Madras of 0·735 and 0·122 respectively to 0·410 and 0·060 at Dodabetta;—the annual range would appear to increase, about and beyond the northern tropic, as the annual range at Calcutta (not by hourly observations) is 0·911; but the diurnal range is somewhat less (0·115) than at Madras. At no one of the places of observation, even taking the maximum pressure of one year with the minimum pressure of another year, does there appear to have been a range of pressure equivalent to an inch of mercury; nevertheless in the Cyclones, or rotatory storms, there occurs at times a range of pressure of nearly two inches of mercury within forty-eight hours; but it is shown from a compa­ rison of the simultaneous records on board ship, where these great depressions were noted, with the records at the observatories on shore, that the great depressions occurred within very limited areas.

Interisland movements of Peary caribou (Rangifer tarandus pearyi) on western Queen Elizabeth Islands, Arctic Canada

1977 ◽  
Vol 55 (6) ◽  
pp. 1029-1037 ◽  
Author(s):  
Frank L. Miller ◽  
Richard H. Russell ◽  
Anne Gunn
Keyword(s):  
Seasonal Changes ◽  
Horizontal Plane ◽  
Rangifer Tarandus ◽  
Maximum Distance ◽  
Arctic Canada ◽  
Complete Evaluation ◽  
Spray Method ◽  
Annual Range ◽  
Vector Sum

To verify that Peary caribou were making seasonal interisland movements, we used an aerial dye-spray method. In April 1974, about 230 caribou were dye-marked green, and about 200 were marked red on Prince Patrick and Eglinton islands respectively. Aerial searches in June and July 1974 located 41 sightings of dye-marked animals. Of animals marked on Prince Patrick Island 4 were seen on Melville Island, 3 on Eglinton Island, and 16 on Prince Patrick. Of sightings of animals marked on Eglinton Island, there were 6 on Prince Patrick Island and 12 on Eglinton. Maximum distance travelled (vector sum on horizontal plane) by marked caribou was 450 km, from Prince Patrick Island to eastern Melville Island. The study indicates that high proportions of the caribou population seasonally range over two or more islands of the western Queen Elizabeth Group. Therefore, complete evaluation of annual range requirements on an island basis should take into consideration seasonal changes in numbers of caribou that are due to interisland movements.

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