scholarly journals Contribution to the Study of the European Ground Squirrel’s Population (Spermophilus citellus Linnaeus, 1766) in Rila National Park, Bulgaria

2020 ◽  
Vol 18 (4) ◽  
pp. 75-83
Author(s):  
Emanuil Mitrevichin ◽  
Lidia Sakelarieva
Keyword(s):  
Population Density ◽  
Ground Squirrel ◽  
National Park ◽  
Research Area ◽  
Scientific Data ◽  
Relative Population ◽  
Spermophilus Citellus ◽  
Stable Populations

Although there are still some large and stable populations of the European Ground Squirrel, there has been a serious decline in the number and density of most of the species populations throughout its range, including in Bulgaria. The aim of the study is to supplement the scientific data about the population of the European Ground Squirrel and its habitat in Rila National Park, Southwestern Bulgaria. The research was carried out in 2017-2019 in two study areas, each divided into 20 (21) transects (every 100 m long and 5 m wide). The results have shown that the relative population density based on the number of holes tends to decrease in the period of study. The most likely reason for this, and the most significant identified threat to the population of the species in the research area in general, is the observed deterioration of the habitat status.

Gran Paradiso: Erkenntnisse aus der sich natürlich regulierenden Steinbockpopulation|Gran Paradiso: Conclusions from the naturally regulated Capricorn population

2007 ◽  
Vol 158 (11) ◽  
pp. 349-352
Author(s):  
Grégory Amos ◽  
Ambroise Marchand ◽  
Anja Schneiter ◽  
Annina Sorg
Keyword(s):  
Nineteenth Century ◽  
Population Density ◽  
National Park ◽  
Optimal Management ◽  
Capra Ibex ◽  
Large Fluctuations ◽  
The Alps ◽  
Gran Paradiso ◽  
Gran Paradiso National Park

The last Capricorns (Capra ibex ibex) in the Alps survived during the nineteenth century in the Aosta valley thanks to the royal hunting reservation (today Gran Paradiso national park). Capricorns from this reservation were successfully re-introduced in Switzerland after its Capricorn population had disappeared. Currently in Switzerland there are 13200 Capricorns. Every year 1000 are hunted in order to prevent a large variation and overaging of their population and the damage of pasture. In contrast, in the Gran Paradiso national park the game population regulates itself naturally for over eighty years. There are large fluctuations in the Capricorn population (2600–5000) which are most likely due to the climate, amount of snow, population density and to the interactions of these factors. The long-term surveys in the Gran Paradiso national park and the investigations of the capacity of this area are a valuable example for the optimal management of the ibexes in Switzerland.

Density and activity patterns of ocelot populations in Yasuní National Park, Ecuador

Mammalia ◽  
2016 ◽  
Vol 80 (4) ◽  
Author(s):  
Julia Salvador ◽  
Santiago Espinosa
Keyword(s):  
Population Density ◽  
Habitat Loss ◽  
National Park ◽  
Conservation Status ◽  
Activity Patterns ◽  
Camera Trap ◽  
Oil Extraction ◽  
Density Estimates ◽  
Yasuni National Park ◽  
Ecuadorian Amazon

AbstractOcelots were historically hunted for their skins but habitat loss is now their most serious threat, causing rapid declines in populations throughout their range. Ocelot abundance has been estimated for various locations across the Neotropics, but we still lack this information from some countries, including Ecuador. Knowing whether ocelot abundance is increasing or decreasing is important to assess the conservation status of this species and the conditions of its habitats in the Ecuadorian Amazon and in the region. To determine whether ocelot abundance and its behavior are affected by human-related activities, camera-trap surveys were carried out in two localities of Yasuní National Park (YNP), one that has experienced hunting, oil extraction, and roads (Maxus Road) and one that is largely unaffected by these activities (Lorocachi). During the survey, 35 and 36 individual ocelots were photographed in Maxus Road and Lorocachi, respectively. Population density estimates were similar for both localities, ranging from 0.31 (SE±6) to 0.85 (SE±17) ocelots/km

scholarly journals Atlas of Yellowstone, 2nd Edition: Celebrating 150 Years of the World’s First National Park, 1872–2022

2019 ◽  
Vol 1 ◽  
pp. 1-1
Author(s):  
W. Andrew Marcus ◽  
James E. Meacham ◽  
Justin T. Menke ◽  
Aleathea Y. Steingisser ◽  
Ann E. Rodman
Keyword(s):  
Key Management ◽  
Yellowstone National Park ◽  
National Park ◽  
Scientific Data ◽  
Light Pollution ◽  
Natural Setting ◽  
The World ◽  
History Of ◽  
The Many ◽  
Management Issues

<p><strong>Abstract.</strong> The Second Edition of the Atlas of Yellowstone will celebrate the 150-year history of the world’s first national park – and reflect on the future of Yellowstone and its evolving place in the world. Like the first Atlas of Yellowstone published in 2012, the Second Edition will provide a comprehensive view of the human and natural setting of Yellowstone National Park. Also like the First Edition, the new edition will portray variations over space and time, explore human-nature interactions throughout the region, document connections of Yellowstone to the rest of the world, and &amp;ndash; ultimately &amp;ndash; guide the reader to a deeper appreciation of Yellowstone.</p><p>Beyond that, the new edition will provide much expanded coverage of the park’s history. Readers will better understand the many different ways in which the creation of Yellowstone National Park has preserved and altered the landscapes and ecology of Yellowstone and conservation thought and practice, both locally and around the world.</p><p>The new atlas will also reflect advances in scientific data collection, knowledge, and insight gained since publication of the first edition. New topic pages will address key management issues ranging from increased visitor impact to wildlife disease to light pollution. In addition, many of the 850 existing graphics will be updated, reimagined, or replaced by new graphics that capture the remarkable wealth of data that has become available since the First Edition. Whether it be tracking of individual wolves, ecosystem imagery from space, or detailed visitor surveys &amp;ndash; new data provide insights that could not be graphically displayed before.</p><p>The Second Edition celebrates 150 years of America’s best idea and what that has meant to the world. The significance of Yellowstone National Park to conservation, scholarship, and the human experience is enormous, and deserves a volume that captures that importance.</p>

scholarly journals KEPADATAN POPULASI MAMALIA DARAT KARNIVORA DI CAMP LEAKEY KAWASAN TAMAN NASIONAL TANJUNG PUTING, KALIMANTAN TENGAH

Jurnal BIOMA ◽  
2017 ◽  
Vol 12 (2) ◽  
pp. 83
Author(s):  
Siwi Arthapati Mandiri ◽  
Paskal Sukandar ◽  
Yossa Istiadi
Keyword(s):  
Data Collection ◽  
Population Density ◽  
National Park ◽  
Line Transect ◽  
Line Transect Sampling ◽  
Clouded Leopard ◽  
Helarctos Malayanus ◽  
Transect Sampling ◽  
Palm Civet ◽  
Leopard Cat

Borneo has wide land that support high biodiversity. One of them is Tanjung Puting National Park (TPNP), which have biodiversity such as terrestrial mammalian carnivore. Carnivore has a role to maintain its ecosystems. But, there are no data for population density of terrestrial mammalian carnivore. The object of this research is to find out population density of terrestrial mammalian carnivore in Camp Leakey, TPNP, Central Borneo. This research accomplished in September-October 2015 in Camp Leakey. Using line-transect sampling. Data collection was accomplished at 18.00-24.00 Central Indonesian Time (WITA) on eight transects with three times replication by direct surveys and indirect surveys. This research has obtained five species, malayan sun bear (Helarctos malayanus), sunda clouded leopard (Neofelis diardi), leopard cat, and group of civet, like small-toothed palm civet (Arctogalidia trivirgata) and asian palm civet (Paradoxurus hermaphroditus). Population density of each species from the highest to the lowest is 13,5 Individual of leopard cat/km2, 9,84 Individual of malayan sun bears/km2, 4,31 Individual of sunda clouded leopard/km2, and 3,65 Individual of civet/km2. Malayan sun bears, sunda clouded leopards and civets prefer to be in land forest. Leopard cats prefers to be in transition forest.

scholarly journals Optimum Carrying Capacity for Bison in Theodore Roosevelt National Park

1982 ◽  
Vol 6 ◽  
pp. 95-97
Author(s):  
Clayton Marlow ◽  
Lynn Irby ◽  
Jack Norland
Keyword(s):  
Population Density ◽  
Carrying Capacity ◽  
Food Habits ◽  
National Park ◽  
Theodore Roosevelt ◽  
Secondary Use ◽  
Range Condition ◽  
Theodore Roosevelt National Park ◽  
Management Priorities ◽  
Capacity Estimates

This project was designed to determine the optimum population size for bison in the Theodore Roosevelt National Park (TRNP) by fulfilling the following objectives: 1. Delineate primary and secondary bison ranges; 2. Determine forage productivity for major range sites within primary and secondary use areas; 3. Determine the general seasonal food habits of bison in TRNP; 4. Determine range condition under present population density of bison and the maximum carrying capacity of primary use areas; and 5. Integrate range condition and carrying capacity estimates with management priorities for bison on the TRNP.

scholarly journals Human impact and population dynamics in the Neolithic and Bronze Age: Multi-proxy evidence from north-western Central Europe

The Holocene ◽  
2019 ◽  
Vol 29 (10) ◽  
pp. 1596-1606 ◽  
Author(s):  
Ingo Feeser ◽  
Walter Dörfler ◽  
Jutta Kneisel ◽  
Martin Hinz ◽  
Stefan Dreibrodt
Keyword(s):  
Population Dynamics ◽  
Population Density ◽  
Bronze Age ◽  
Human Impact ◽  
Central Europe ◽  
Human Activity ◽  
Temporal Distribution ◽  
Relative Population ◽  
Erosion History ◽  
North Western

This paper aims at reconstructing the population dynamics during the Neolithic and Bronze Age, c. 4500–500 cal. BC, in north-western Central Europe. The approach is based on the assumption that increased population density is positively linked with human activity and human impact on the environment, respectively. Therefore, we use archaeological 14C dates and palaeoenvironmental data from northern Germany and south-western Denmark to construct and compare independent proxies of human activity. The latter involves relative quantification of human impact based on pollen analysis and soil erosion history inferred from summarizing of dated colluvial layers. Concurring patterns of changes in human activity are frequently recorded on a multi-centennial scale. Whereas such multi-proxy patterns are interpreted to indicate relative population changes, divergent patterns are discussed in the context of proxy-related uncertainties and potential biases. Patterns of temporal distribution of increasing and decreasing human activity are understood as ‘boom and bust’ phases in population density/size. Based on the comparison of the three proxies, we identify five phases of growing (boom) and four phases of decreasing (bust) population. The boom phases date to ca. 4000–3500, 3000–2900, 2200–2100, 1450–1300 and 1000–750 cal. BC. The bust phases to ca. 3200–3000, 2400–2300, 1650–1500 and 1200–1100 cal. BC.

scholarly journals A comparison of density estimation methods in plateau pika populations in an alpine meadow ecosystem

2020 ◽  
Vol 101 (4) ◽  
pp. 1091-1096
Author(s):  
Wanrong Wei ◽  
Jundong He ◽  
Qiaoyan Zheng ◽  
Yuli He ◽  
Maria K Oosthuizen
Keyword(s):  
Population Density ◽  
Relative Density ◽  
Alpine Meadow ◽  
Survey Methods ◽  
Estimation Methods ◽  
Plateau Pika ◽  
Relative Population ◽  
Burrow Density ◽  
The Absolute ◽  
Absolute Population

Abstract Plateau pikas are a keystone species and ecosystem engineers in alpine meadow ecosystems. A number of surveying methods have been used to estimate pika density, but the reliability of these methods is not known. In addition, better population density methodologies allow for more reliable density estimates. We therefore compared the relationship among several commonly used methods of estimating pika relative density and the absolute density (AD) of pika populations. This relationship was investigated in summer and winter pastures to determine whether distribution pattern of the pikas (patchy or uniform) would influence this relationship. During August of 2015 and August of 2016, we measured the relative and absolute population density of pikas in an alpine meadow in the County, Gansu province, northwestern China. Relative density was measured with three indirect and direct methods: the total burrow density (TBD), the active burrow density (ABD), and the direct counting density (DCD) at the peak of pika activity. AD was assessed by removal sampling. Our results showed that the relative population density with all three survey methods was significantly related to the absolute population density. In particular, DCD at the peak of the pika activity showed the best correlation with AD. A simple linear model showed the effect of grazing time by livestock had a significant effect on TBD and ABD. These results imply that using DCD as a method to survey at the peak of the pika activity is more reliable than other methods.

scholarly journals Distribution and Habitat Preference of Hispid Hare (Caprolagus Hispidus) In Shuklaphanta National Park, Nepal

2017 ◽  
Vol 31 (1-2) ◽  
pp. 1-16
Author(s):  
Dhirendra Bahadur Chand ◽  
Laxman Khanal ◽  
Mukesh Kumar Chalise
Keyword(s):  
Population Density ◽  
National Park ◽  
Imperata Cylindrica ◽  
Grass Species ◽  
Population Status ◽  
Tall Grass ◽  
The Past ◽  
Wide Range ◽  
Food Species ◽  
Study Sites

 Hispid hare (Caprolagu shispidus) is an endangered lagomorph which had a wide range of distribution in the past, but currently it is known to occur only from few isolated tall grass pockets of India and Nepal. We explored the population status, habitat utilization and existing threats of the Hispid hare at Shuklaphanta National Park (SNP) by the strip transect and quadrate sampling methods from November 2015 to May 2016 covering both winter and summer seasons. Four study sites of total 1.58ha were selected within SNPand strip transects were randomly laid to determine presence and absence of pellets of Hispid hare and their counts were used to estimate the population density. The Population density of Hispid hare was found to be 0.1820/ha in winter and 0.2268/ha in summer with the statistically significant preference to the tall grassland habitat. Twelve grass species were identified in the habitat of Hispid hare with dominancy of Saccharum spontaneum, Imperata cylindrica, Narenga porphyrocoma, and Saccharum munj. Among the grasses, Imperata cylindrica and Narenga porphyrocoma were the food species of higher preference for Hispid hare.

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