scholarly journals Current status of terrestrial mammals on Jeju Island

2012 ◽  
Vol 1 (2) ◽  
pp. 249-256 ◽  
Author(s):  
Yeong-Seok Jo ◽  
Tae-Wook Kim ◽  
Byeong-Jin Choi ◽  
Hong-Shik Oh
Keyword(s):  
Jeju Island ◽  
Current Status ◽  
Terrestrial Mammals

History of exotic terrestrial mammals in Antarctic regions

Polar Record ◽  
2011 ◽  
Vol 48 (2) ◽  
pp. 123-144 ◽  
Author(s):  
R. K. Headland
Keyword(s):  
Introduced Species ◽  
Environmental Effects ◽  
Scientific Committee ◽  
Current Status ◽  
Entire Region ◽  
Widespread Distribution ◽  
Terrestrial Mammals ◽  
History Of ◽  
Antarctic Research

ABSTRACTA concise account of exotic terrestrial mammals known to have been introduced in Antarctica and the 19 peri-Antarctic islands is provided. This includes the entire region currently relevant to the Scientific Committee on Antarctic Research. Of the 24 introduced species 10 are extant at one or more locations in 2011. Some species have had a widespread distribution and others are represented by one, or a few, individuals. The majority arrived as deliberate introductions but that of some was adventitious. Details of their dates of introduction, current status, and indications of environmental effects, are tabulated. Current eradication programmes are noted.

The status of non-volant mammals along a rainfall gradient in the south-west Kimberley, Western Australia

2012 ◽  
Vol 34 (1) ◽  
pp. 36 ◽  
Author(s):  
A. N. Start ◽  
A. A. Burbidge ◽  
M. C. McDowell ◽  
N. L. McKenzie
Keyword(s):  
Western Australia ◽  
Common Species ◽  
Current Status ◽  
Annual Rainfall ◽  
Mammal Species ◽  
Rainfall Gradient ◽  
Terrestrial Mammals ◽  
South West ◽  
The Status ◽  
High Level

To assess the current status of mammals in relation to mean annual rainfall and to improve knowledge of the original mammalian assemblages in tropical Western Australia, extant terrestrial mammals and subfossil mammalian remains were sought along a rainfall gradient in two parallel ranges in the Kimberley, Western Australia. As expected, extant mammal species richness decreased with decreasing rainfall. Data from other studies in higher-rainfall areas complemented this conclusion and a parallel decline in trap success implied an overall decline in abundance, although numbers of two rodents (Rattus tunneyi and Zyzomys argurus) were highly variable. Small rodents were rare. Subfossil deposits were biased by accumulation processes, with most attributable to tytonid owls. They largely consisted of rodent and, to a lesser extent, small dasyurid bones and there was a high level of consistency in the proportional composition of many common species across the rainfall gradient. Most deposits appear to predate the introduction of stock in the 1880s and some may be much older. All species persist in the study area except two Notomys spp. and three Pseudomys spp. Both the Notomys and one Pseudomys are apparently undescribed, extinct species. However, there were marked ratio differences between subfossil and modern assemblages. Although specimens of species larger than those taken by tytonid owls were scarce, their occurrences were broadly consistent with the modern understanding of distributions.

Conservation status and biogeography of Australia's terrestrial mammals

2008 ◽  
Vol 56 (6) ◽  
pp. 411 ◽  
Author(s):  
Andrew A. Burbidge ◽  
N. L. McKenzie ◽  
K. E. C. Brennan ◽  
J. C. Z. Woinarski ◽  
C. R. Dickman ◽  
...  
Keyword(s):  
Variation Partitioning ◽  
Conservation Status ◽  
Current Status ◽  
Indigenous Species ◽  
Group Level ◽  
Terrestrial Mammals ◽  
European Settlement ◽  
Temperature And Precipitation ◽  
Extant Species ◽  
Continental Islands

This paper attempts to identify and explain patterns in the biogeography of Australia’s indigenous terrestrial mammals at the time of European settlement (before modern extinctions), and also compares species’ pre-European and current status by region. From subfossil, historical and contemporary sources, we compiled data on the past geographic range and present status of mammals for Australia’s 85 biogeographic regions. Of the 305 indigenous species originally present, 91 have disappeared from at least half of the bioregions in which they occurred before European settlement. Thirty-nine extant species ‘persist’ in less than 25% of their original bioregions; 28 of these are marsupials and 11 are rodents. Twenty-two of the original 305 species are extinct, a further eight became restricted to continental islands, and 100 have become extinct in at least one bioregion. Over the same period, 26 species of exotic mammals established wild populations and now occupy from one to 85 bioregions. When we classified the bioregions in terms of their original species composition, the 3-group level in the dendrogram approximated the Torresian, Eyrean and Bassian subregions proposed by Spencer in 1898, while the 4-group level separated southern semiarid Eyrean bioregions, including those in south-west Australia, from the arid Eyrean bioregions. The classification dendrogram showed geographically (and statistically) discrete clustering down to the 19-group level, suggesting that all four subregions can be further divided on the basis of their mammal faunas. Variation partitioning showed 66% of the biogeographical pattern can be explained by environmental factors (related to temperature and precipitation), the spatial position of each bioregion (a third-order polynomial of latitude and longitude), the area of each bioregion, and the richness of species in each bioregion. In addition to the marked distributional changes that indigenous mammals have experienced over the last 200 years, the 49% of variation explainable by temperature and precipitation implies further shifts with global climate change.

Alien terrestrial mammals in Brazil: current status and management

2017 ◽  
Vol 19 (7) ◽  
pp. 2101-2123 ◽  
Author(s):  
Clarissa Alves da Rosa ◽  
Nelson Henrique de Almeida Curi ◽  
Fernando Puertas ◽  
Marcelo Passamani
Keyword(s):  
Current Status ◽  
Terrestrial Mammals ◽  
Brazil Current

scholarly journals Mammal Conservation: Old Problems, New Perspectives, Transdisciplinarity, and the Coming of Age of Conservation Geopolitics

2019 ◽  
Vol 44 (1) ◽  
pp. 61-88 ◽  
Author(s):  
David W. Macdonald
Keyword(s):  
Coming Of Age ◽  
Holistic Approach ◽  
Interdisciplinary Studies ◽  
Current Status ◽  
Top Down ◽  
Terrestrial Mammals ◽  
The Third ◽  
Mammal Conservation ◽  
Broad Scale ◽  
Human Enterprise

I review the shocking current status of terrestrial mammals and then describe an approach to solving it, embracing a continuum of spatial and intellectual scales, from groundedness to geopolitics. Starting with an illustrative arena, the interface between agriculture and wildlife, I then outline the litany of threats to mammals and some successful approaches to their conservation, and document some broad-scale patterns regarding ecosystems, the mammalian communities within, and some implications for conservation. Observing that the battle for mammalian conservation is being badly lost, I dedicate the third part of this article to a combination of top-down and bottom-up, interdisciplinary studies, aspiring to a holistic approach that sets conservation in the wider sphere of the human enterprise and that I term transdisciplinary conservation.

Current status of special planetary and lunar theories and ephemerides

1966 ◽  
Vol 25 ◽  
pp. 266-267
Author(s):  
R. L. Duncombe
Keyword(s):  
Observational Data ◽  
Current Status ◽  
Numerical Errors

An examination of some specialized lunar and planetary ephemerides has revealed inconsistencies in the adopted planetary masses, the presence of non-gravitational terms, and some outright numerical errors. They should be considered of temporary usefulness only, subject to subsequent amendment as required for the interpretation of observational data.

Current Status of Solid-State X-Ray Systems

1985 ◽  
Vol 43 ◽  
pp. 158-161
Author(s):  
Martin Peckerar ◽  
Anastasios Tousimis
Keyword(s):  
Solid State ◽  
Electric Fields ◽  
Spectral Lines ◽  
Current Status ◽  
Mobile Charge ◽  
Electron Hole ◽  
X Ray ◽  
Sensing Systems ◽  
Transmission Electron ◽  
Electron Microscopes

Solid state x-ray sensing systems have been used for many years in conjunction with scanning and transmission electron microscopes. Such systems conveniently provide users with elemental area maps and quantitative chemical analyses of samples. Improvements on these tools are currently sought in the following areas: sensitivity at longer and shorter x-ray wavelengths and minimization of noise-broadening of spectral lines. In this paper, we review basic limitations and recent advances in each of these areas. Throughout the review, we emphasize the systems nature of the problem. That is. limitations exist not only in the sensor elements but also in the preamplifier/amplifier chain and in the interfaces between these components.Solid state x-ray sensors usually function by way of incident photons creating electron-hole pairs in semiconductor material. This radiation-produced mobile charge is swept into external circuitry by electric fields in the semiconductor bulk.

Electron-deficient boron-based catalysts for C–H bond functionalisation

2021 ◽  
Author(s):  
Yuanhong Ma ◽  
Shao-Jie Lou ◽  
Zhaomin Hou
Keyword(s):  
Review Article ◽  
Current Status ◽  
Comprehensive Overview

This review article provides a comprehensive overview to recognise the current status of electron-deficient boron-based catalysis in C–H functionalisations.

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