Digging in: a review of the ecology and management of a threatened reptile with a small disjunct distribution – the heath skink, Liopholis multiscutata, in Victoria, south-eastern Australia

2019 ◽  
Vol 25 (3) ◽  
pp. 222 ◽  
Author(s):  
Geoff W. Brown ◽  
Peter Robertson ◽  
Ben G. Fanson
Keyword(s):  
General Trend ◽  
Disjunct Distribution ◽  
Population Status ◽  
Management Actions ◽  
Eastern Australia ◽  
Disjunct Populations ◽  
History Of ◽  
Available Information ◽  
Management Priorities ◽  
Ongoing Monitoring

The central issue for species that are highly localised habitat specialists and occur in relatively small numbers is vulnerability to extinction processes. The heath skink, Liopholis multiscutata, is considered Critically Endangered in Victoria, in part because it is restricted to essentially four small and highly disjunct populations in semiarid mallee dunefields. It provides an example of a rare and cryptic species that is especially vulnerable to decline and consequently provides management challenges. Here, we crystallise available information on the ecology and life history of this threatened lizard, and review monitoring data to evaluate population status, primary threats and management imperatives. There has been a substantial decrease across the known range of the lizard in Victoria, most likely due to predation and fire. Recent monitoring of the four potentially viable populations revealed a general trend of decline. Recommendations for research and management priorities for the lizard in Victoria are provided; generally, these include further exploration of the lizard’s phylogeny and ecology, and ongoing monitoring of the trajectory of the lizard’s population status, threats to the lizard’s persistence and the effectiveness of management actions employed to ameliorate extinction threats.

scholarly journals Morphological and genetic divergence supports peripheral endemism and a recent evolutionary history of Chrysiptera demoiselles in the subtropical South Pacific

Coral Reefs ◽  
2021 ◽  
Author(s):  
Libby Liggins ◽  
Liam Kilduff ◽  
Thomas Trnski ◽  
Erwan Delrieu-Trottin ◽  
Jose I. Carvajal ◽  
...  
Keyword(s):  
South Pacific ◽  
French Polynesia ◽  
Western Pacific ◽  
Disjunct Distribution ◽  
Evolutionary Relationships ◽  
The South ◽  
Rapa Nui ◽  
Eastern Australia ◽  
Disjunct Populations ◽  
History Of

AbstractThe delineation of species and their evolutionary relationships informs our understanding of biogeography and how regional faunas are assembled. The peripheral geography and local environment of reefs in the subtropical South Pacific likely promotes the allopatric and adaptive divergence of taxa colonising from the tropics; however, the fauna of this region has been relatively understudied. Here, we address the taxonomic and evolutionary relationships among Chrysiptera taxa of the subtropical South Pacific. We use meristic counts, morphometrics and genetic markers to characterise the similarities and differences among four taxa restricted to the South Pacific region that have strikingly different colouration: C. notialis, a taxon restricted to eastern Australia, New Caledonia, Lord Howe Island and Norfolk Island; C. galba, found in the Cook Islands, southern French Polynesia and Pitcairn Islands; and the two disjunct populations of C. rapanui, found in the eastern Pacific around Rapa Nui (Isla de Pascua or Easter Island) and Motu Motiro Hiva (Salas y Gómez) and in the South-western Pacific around Rangitāhua (Kermadec Islands). Our morphometric analysis confirmed that these four taxa, including the two disjunct populations of C. rapanui, are morphologically distinct. However, our genetic analysis revealed that only C. rapanui from Rapa Nui was genetically differentiated, whereas C. rapanui of Rangitāhua, C. galba and C. notialis all shared a common haplotype. Furthermore, none of the taxa could be consistently differentiated based on individual meristic features. Our study reconciles a formerly perplexing and disjunct distribution for C. rapanui, to reveal that C. rapanui is an endemic of Rapa Nui and that the Chrysiptera of French Polynesia, Rangitāhua, and the South-western Pacific have only a very recent history of divergence. Our analyses suggest these subtropical taxa have diverged from a predominantly tropical Chrysiptera genus in morphological features important in determining colonisation success, locomotion and feeding ecology.

Southern Conifers in Time and Space

1999 ◽  
Vol 47 (5) ◽  
pp. 639 ◽  
Author(s):  
Robert S. Hill ◽  
Tim J. Brodribb
Keyword(s):  
Southern Hemisphere ◽  
Dry Forest ◽  
Eastern Australia ◽  
History Of ◽  
Extinct Genus ◽  
Fossil Records ◽  
Available Information ◽  
Wet Forests ◽  
Cenozoic Sediments ◽  
Large Compound

The three southern conifer families, Araucariaceae, Cupressaceae and Podocarpaceae, have a long history and continue to be an important part of the vegetation today. The Araucariaceae have the most extensive fossil record, occurring in both hemispheres, and with Araucaria in particular having an ancient origin. In the Southern Hemisphere Araucaria and Agathis have substantial macrofossil records, especially in Australasia, and Wollemia probably also has an important macrofossil record. At least one extinct genus of Araucariaceae is present as a macrofossil during the Cenozoic. Cupressaceae macrofossils are difficult to identify in older sediments, but the southern genera begin their record in the Cretaceous (Athrotaxis) and become more diverse and extensive during the Cenozoic. Several extinct genera of Cupressaceae also occur in Cretaceous and Cenozoic sediments in Australasia. The Podocarpaceae probably begin their macrofossil record in the Triassic, although the early history is still uncertain. Occasional Podocarpaceae macrofossils have been recorded in the Northern Hemisphere, but they are essentially a southern family. The Cenozoic macrofossil record of the Podocarpaceae is extensive, especially in south-eastern Australia, where the majority of the extant genera have been recorded. Some extinct genera have also been reported from across high southern latitudes, confirming an extremely diverse and widespread suite of Podocarpaceae during the Cenozoic in the region. In the Southern Hemisphere today conifers achieve greatest abundance in wet forests. Those which compete successfully with broad-leaved angiosperms in warmer forests produce broad, flat photosynthetic shoots. In the Araucariaceae this is achieved by the planation of multiveined leaves into large compound shoots. In the other two families leaves are now limited to a single vein (except Nageia), and to overcome this limitation many genera have resorted to re-orientation of leaves and two-dimensional flattening of shoots. The Podocarpaceae show greatest development of this strategy with 11 of 19 genera producing shoots analogous to compound leaves. The concentration of conifers in wet forest left them vulnerable to the climate change which occurred in the Cenozoic, and decreases in diversity have occurred since the Paleogene in all regions where fossil records are available. Information about the history of the dry forest conifers is extremely limited because of a lack of fossilisation in such environments. The southern conifers, past and present, demonstrate an ability to compete effectively with angiosperms in many habitats and should not be viewed as remnants which are ineffectual against angiosperm competitors.

Bridled Quail-dove Geotrygon mystacea population assessment after hurricanes Irma and Maria, St. Eustatius, Caribbean Netherlands

2021 ◽  
pp. 1-12
Author(s):  
FRANK F. RIVERA-MILÁN ◽  
HANNAH MADDEN ◽  
KEVIN VERDEL
Keyword(s):  
National Park ◽  
Food Limitation ◽  
Distance Sampling ◽  
Population Status ◽  
Management Actions ◽  
Abundance Estimates ◽  
Detection Mode ◽  
Limited Food ◽  
Seed Eating ◽  
Free Ranging

Summary Structural vegetation damage and food limitation are important effects of major hurricanes, particularly for fruit/seed-eating, forest-dependent Caribbean birds with restricted distributions and small populations, such as the Bridled Quail-dove Geotrygon mystacea. Motivated by the lack of abundance estimates, corrected for detection probability, we conducted distance-sampling surveys inside and outside the Quill National Park each May in 2016-2019. Detection mode was the most important covariate, with others receiving no support from the data. Detectability of available single individuals and clusters of individuals within 60 m of transect centrelines averaged 0.957 ± 0.114 standard error for audio detections, 0.434 ± 0.052 for visual detections, and 0.693 ± 0.064 for detection modes combined. Availability averaged 0.475 ± 0.138 and the product of detectability and availability averaged 0.329 ± 0.098. Density averaged 1.459 ± 0.277 individuals ha-1 and population size averaged 642 ± 122 individuals in 440 ha. Density did not differ along and away from forest trails, but was higher inside than outside the park and at elevations within 201-400 m than 100-200 m and 401-600 m. Density declined by 76% after hurricanes Irma and Maria in 2017. We suggest that major hurricanes together with free-ranging livestock overgrazing degraded foraging habitats, limited food supply, and caused a population bottleneck. Our methodology can be implemented across the distribution range to assess population status and trends and evaluate the result of management actions at key conservation sites. Bridled Quail-dove populations probably were declining on most islands before the 2017 hurricanes and population status warrants revision.

scholarly journals Missions and Missionaries in the Americas:A Special Teaching and Research Collection of The Americas

2017 ◽  
Vol 74 (S2) ◽  
pp. S4-S13 ◽  
Author(s):  
Christopher Woolley
Keyword(s):  
General Trend ◽  
Rural Life ◽  
Special Issue ◽  
Teaching And Research ◽  
Research Collection ◽  
History Of

For more than 70 years,The Americas, a publication of the Academy of American Franciscan History, has been a leading forum for scholars studying the history of Spanish America's colonial missions. As the articles collected from the journal for this special issue show, the general trend has been to move beyond the hagiographic treatment of missionaries and towards a more complex understanding of the historical roles played by the colonial missions in rural life.

Positive and negative face as descriptive categories in the history of English

2011 ◽  
Vol 12 (1-2) ◽  
pp. 178-197 ◽  
Author(s):  
Andreas H. Jucker
Keyword(s):  
Recent Work ◽  
Middle English ◽  
Old English ◽  
General Trend ◽  
Clear Distinction ◽  
History Of ◽  
Negative Face

Studies in the history of politeness in English have generally relied on the notions of positive and negative face. While earlier work argued that a general trend from positive politeness to negative politeness can be observed, more recent work has shown that in Old English and in Middle English face concerns were not as important as in Modern English and that, in certain contexts, there are also opposing tendencies from negative to positive politeness. In this paper, I focus in more detail on the notions of positive and negative face and follow up earlier suggestions that for negative face a clear distinction must be made between deference politeness and non-imposition politeness. On this basis, I assess the usefulness of the notions of positive and negative face for the development of politeness in the history of English.

scholarly journals Biological Transmission of Arboviruses: Reexamination of and New Insights into Components, Mechanisms, and Unique Traits as Well as Their Evolutionary Trends

2005 ◽  
Vol 18 (4) ◽  
pp. 608-637 ◽  
Author(s):  
Goro Kuno ◽  
Gwong-Jen J. Chang
Keyword(s):  
Biological Sciences ◽  
Host Range ◽  
Disease Transmission ◽  
Evolutionary Process ◽  
Field Research ◽  
Diverse Range ◽  
Unique Mode ◽  
History Of ◽  
Mode Of Transmission ◽  
Available Information

SUMMARY Among animal viruses, arboviruses are unique in that they depend on arthropod vectors for transmission. Field research and laboratory investigations related to the three components of this unique mode of transmission, virus, vector, and vertebrate host, have produced an enormous amount of valuable information that may be found in numerous publications. However, despite many reviews on specific viruses, diseases, or interests, a systematic approach to organizing the available information on all facets of biological transmission and then to interpret it in the context of the evolutionary process has not been attempted before. Such an attempt in this review clearly demonstrates tremendous progress made worldwide to characterize the viruses, to comprehend disease transmission and pathogenesis, and to understand the biology of vectors and their role in transmission. The rapid progress in molecular biologic techniques also helped resolve many virologic puzzles and yielded highly valuable data hitherto unavailable, such as characterization of virus receptors, the genetic basis of vertebrate resistance to viral infection, and phylogenetic evidence of the history of host range shifts in arboviruses. However, glaring gaps in knowledge of many critical subjects, such as the mechanism of viral persistence and the existence of vertebrate reservoirs, are still evident. Furthermore, with the accumulated data, new questions were raised, such as evolutionary directions of virus virulence and of host range. Although many fundamental questions on the evolution of this unique mode of transmission remained unresolved in the absence of a fossil record, available observations for arboviruses and the information derived from studies in other fields of the biological sciences suggested convergent evolution as a plausible process. Overall, discussion of the diverse range of theories proposed and observations made by many investigators was found to be highly valuable for sorting out the possible mechanism(s) of the emergence of arboviral diseases.

Distribution and life history of caridean shrimps in regulated lowland rivers in southern Australia

2004 ◽  
Vol 55 (3) ◽  
pp. 295 ◽  
Author(s):  
A. J. Richardson ◽  
J. E. Growns ◽  
R. A. Cook
Keyword(s):  
Life History ◽  
Life Stages ◽  
Lowland Rivers ◽  
Flow Alteration ◽  
Eastern Australia ◽  
History Of ◽  
Paratya Australiensis ◽  
Juvenile Stages ◽  
Shrimp Abundance ◽  
Large Adult

Caridean shrimps are an integral component of lowland river ecosystems in south-eastern Australia, but their distributions may be affected by flow alteration. Monthly shrimp samples were collected from slackwaters in three hydrologically distinct sections of the heavily regulated Campaspe River and the less regulated Broken River for three consecutive years. The distributions of Paratya australiensis, Caridina mccullochi and Macrobrachium australiense, along with their life history in river sections with different hydrology are outlined. Paratya australiensis and M. australiense occurred in all sections, but C. mccullochi was absent from sections of the Campaspe River that received irrigation flows during summer/autumn. Shrimp larvae were most abundant in summer (December–February) and juvenile recruitment continued through to mid autumn (April). Breeding and recruitment of P. australiensis occurred for longer than other shrimps. Apart from large adult and berried M. australiense, all life stages of shrimps commonly occurred in slackwaters, particularly the larval and juvenile stages. Irrigation flows in summer/autumn probably adversely affect the size, extent and arrangement of slackwaters, at a time when they may be critical habitats for C. mccullochi larval development and recruitment. Dams and weirs in the Campaspe River may have influenced shrimp abundance and the timing of breeding.

scholarly journals Population status of Heptner's markhor Capra falconeri heptneri in Tajikistan: challenges for conservation

Oryx ◽  
2014 ◽  
Vol 49 (3) ◽  
pp. 506-513 ◽  
Author(s):  
Stefan Michel ◽  
Tatjana Rosen Michel ◽  
Abdusattor Saidov ◽  
Khalil Karimov ◽  
Munavvar Alidodov ◽  
...  
Keyword(s):  
Protected Areas ◽  
Disease Transmission ◽  
Total Population ◽  
Habitat Degradation ◽  
Sustainable Use ◽  
Population Status ◽  
Community Based ◽  
Illegal Hunting ◽  
Trophy Hunting ◽  
Disjunct Populations

AbstractHeptner's markhor Capra falconeri heptneri is an Endangered wild goat occurring in disjunct populations in southern Tajikistan, Afghanistan, Uzbekistan and Turkmenistan. Surveys to determine the total population in Tajikistan were conducted during February–April 2012. A total of 1,018 animals were observed. In most areas, which include state protected areas and family- and community-based conservancies, markhor populations are stable or increasing. Threats include illegal hunting, habitat degradation, competition with livestock and disease transmission. To motivate conservancies economically to protect markhor populations, trophy hunting should be permitted to accommodate the sustainable use of markhor, with revenues distributed in a transparent and equitably shared manner.

scholarly journals CULTURAL REPRESENTATION OF POWER AND THE COURT DURING THE PERSONAL REIGN OF CHARLES I STUART

2020 ◽  
Vol 30 (1) ◽  
pp. 104-110
Author(s):  
L. I. Ivonina
Keyword(s):  
Social Context ◽  
General Trend ◽  
Daily Life ◽  
Cultural Representation ◽  
The Other ◽  
Charles I ◽  
The World ◽  
King Charles I ◽  
History Of ◽  
The One

The article analyzes the main features of the Caroline era in the history of Britain, which were reflected in the cultural representation of the power of King Charles I Stuart and the court’s daily life in the 1630s. The author shows that, on the one hand, the cult of peace and the greatness of the monarch were the cultural product of the Caroline court against the background of the Thirty Years' War in continental Europe. On the other hand, there was a spread of various forms of escapism, the departure into the world of illusions. On the whole, the representation of the power of Charles Stuart and the court’s daily life were in line with the general trend of the time. At the same time, the court of Charles I reflected his personality. Thinly sensing and even determining the artistic tastes of his era, the English king abstracted from its political and social context.

scholarly journals ETHNONYM JURCHEN IN THE CONTEXT OF HISTORY AND ARCHAIC BELIEFS OF THE PEOPLE (BASED ON THE WORKS OF CHINESE RESEARCHERS)

2020 ◽  
pp. 19-25
Author(s):  
MARINA A. KHAYMURZINA ◽  
Keyword(s):  
Religious Beliefs ◽  
Ethnic Relations ◽  
Chinese Characters ◽  
Cultural Characteristics ◽  
Local Language ◽  
The People ◽  
History Of ◽  
Available Information

The name of the people reflects a lot - the history of inter-ethnic relations, cultural and language contacts, religious beliefs. The difficulty of studying the origin, sound and meaning of a name is due to the lack or insufficiency of language material. There are various hieroglyphic records of the Jurchen ethnonym. Such diversity is determined by time, place, local language and the choice of Chinese characters to fix the name of this community. However, the sound of all hieroglyphic records of the Jurchen name is almost identical. The word Jurchen is also recorded in Jurchen language. Available information indicates that the meaning of the Jurchen name is «gold». The meaning as «Eastern falcon/eagle» is also take a place, it reflecting the cultural characteristics of the Jurchens, their ethnic spirit and primitive religious beliefs.

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