scholarly journals Comment on “Eocene Fagaceae from Patagonia and Gondwanan legacy in Asian rainforests”

Science ◽  
2019 ◽  
Vol 366 (6467) ◽  
pp. eaaz2189
Author(s):  
Thomas Denk ◽  
Robert S. Hill ◽  
Marco C. Simeone ◽  
Chuck Cannon ◽  
Mary E. Dettmann ◽  
...  
Keyword(s):  
Southeast Asia ◽  
Southern Hemisphere ◽  
Research Articles ◽  
Modern Distribution ◽  
Molecular Patterns ◽  
Southern Route

Wilf et al. (Research Articles, 7 June 2019, eaaw5139) claim that Castanopsis evolved in the Southern Hemisphere from where it spread to its modern distribution in Southeast Asia. However, extensive paleobotanical records of Antarctica and Australia lack evidence of any Fagaceae, and molecular patterns indicate shared biogeographic histories of Castanopsis, Castanea, Lithocarpus, and Quercus subgenus Cerris, making the southern route unlikely.

A new record of Zatypota albicoxa (Hymenoptera: Ichneumonidae) from Indonesia, with description of a new species of its host spider (Araneae: Theridiidae)

Zootaxa ◽  
2011 ◽  
Vol 2910 (1) ◽  
Author(s):  
KEIZO TAKASUKA ◽  
HAJIME YOSHIDA ◽  
PUTRA NUGROHO ◽  
RIKIO MATSUMOTO
Keyword(s):  
New Species ◽  
Southeast Asia ◽  
Southern Hemisphere ◽  
New Record ◽  
First Record ◽  
Oriental Region ◽  
Indonesian Population ◽  
A New Species

Zatypota albicoxa (Walker) is newly recorded from Mt. Merapi, Java Is., Indonesia. This is the first record of Z. albicoxa from this part of the Oriental region and from the Southern Hemisphere, and the first record of the genus Zatypota from Southeast Asia. The Indonesian population of Z. albicoxa attacks a theridiid spider of the genus Parasteatoda, as do populations of Z. albicoxa in other regions. The spider is a new species, and is described under the name of Parasteatoda merapiensis.

New evidence from East Timor contributes to our understanding of earliest modern human colonisation east of the Sunda Shelf

Antiquity ◽  
2007 ◽  
Vol 81 (313) ◽  
pp. 523-535 ◽  
Author(s):  
Sue O'Connor
Keyword(s):  
Southeast Asia ◽  
Modern Human ◽  
East Timor ◽  
Sunda Shelf ◽  
Modern Humans ◽  
Research Directions ◽  
Island Southeast Asia ◽  
New Research ◽  
New Evidence ◽  
Southern Route

New dates by which modern humans reached East Timor prompts this very useful update of the colonisation of Island Southeast Asia. The author addresses all the difficult questions: why are the dates for modern humans in Australia earlier than they are in Island Southeast Asia? Which route did they use to get there? If they used the southern route, why or how did they manage to bypass Flores, whereHomo floresiensis, the famous non-sapienshominin known to the world as the ‘hobbit’ was already in residence? New work at the rock shelter of Jerimalai suggests some answers and new research directions.

scholarly journals PRRDB 2.0: a comprehensive database of pattern-recognition receptors and their ligands

Database ◽  
2019 ◽  
Vol 2019 ◽  
Author(s):  
Dilraj Kaur ◽  
Sumeet Patiyal ◽  
Neelam Sharma ◽  
Salman Sadullah Usmani ◽  
Gajendra P S Raghava
Keyword(s):  
Pattern Recognition ◽  
Data Bank ◽  
Pattern Recognition Receptors ◽  
Research Articles ◽  
Web Based ◽  
Source Type ◽  
Comprehensive Information ◽  
Extensive Information ◽  
Function Relationship ◽  
Molecular Patterns

Abstract PRRDB 2.0 is an updated version of PRRDB that maintains comprehensive information about pattern-recognition receptors (PRRs) and their ligands. The current version of the database has ~2700 entries, which are nearly five times of the previous version. It contains extensive information about 467 unique PRRs and 827 pathogens-associated molecular patterns (PAMPs), manually extracted from ~600 research articles. It possesses information about PRRs and PAMPs that has been extracted manually from research articles and public databases. Each entry provides comprehensive details about PRRs and PAMPs that includes their name, sequence, origin, source, type, etc. We have provided internal and external links to various databases/resources (like Swiss-Prot, PubChem) to obtain further information about PRRs and their ligands. This database also provides links to ~4500 experimentally determined structures in the protein data bank of various PRRs and their complexes. In addition, 110 PRRs with unknown structures have also been predicted, which are important in order to understand the structure–function relationship between receptors and their ligands. Numerous web-based tools have been integrated into PRRDB 2.0 to facilitate users to perform different tasks like (i) extensive searching of the database; (ii) browsing or categorization of data based on receptors, ligands, source, etc. and (iii) similarity search using BLAST and Smith–Waterman algorithm.

The genusLyreidusde Haan, 1839 (Crustacea, Decapoda, Raninidae): systematics and biogeography

1992 ◽  
Vol 66 (6) ◽  
pp. 943-957 ◽  
Author(s):  
Rodney M. Feldmann
Keyword(s):  
New Zealand ◽  
Southern Hemisphere ◽  
North Atlantic ◽  
High Latitude ◽  
Middle Eocene ◽  
Early Eocene ◽  
Pacific Region ◽  
Fossil Species ◽  
West Pacific ◽  
Modern Distribution

Six extant and nine fossil species of the raninidLyreidusde Haan, includingLyreidus(Lyreidus)lebuensisn. sp. andLyreidus(Lysirude)hookerin. sp., are recognized. Based on morphology of the anterolateral margin and sternum, the species are referred to two subgenera,Lyreidus(Lyreidus) andLyreidus(Lysirude). The genus first appears in shallow-water, high-latitude, southern hemisphere localities in New Zealand, Antarctica, and Chile in the early Eocene. Subsequently, the nominate subgenus is confined to the southern hemisphere until the Neogene when it dispersed into the Indo-West Pacific region.Lyreidus(Lysirude) is documented by early and middle Eocene occurrences in Antarctica and New Zealand; however, all subsequent occurrences, fossil and recent, are in the northern hemisphere. The disjunct modern distribution within the genus is confined to this subfamily; species are known from the western North Atlantic and the Indo-West Pacific.

scholarly journals Global source attribution of sulfate concentration, direct and indirect radiative forcing

2017 ◽  
Author(s):  
Yang Yang ◽  
Hailong Wang ◽  
Steven J. Smith ◽  
Richard Easter ◽  
Po-Lun Ma ◽  
...  
Keyword(s):  
Southeast Asia ◽  
East Asia ◽  
South Asia ◽  
Central Asia ◽  
Southern Hemisphere ◽  
North Africa ◽  
Radiative Forcing ◽  
Sulfate Concentration ◽  
Near Surface ◽  
Indirect Radiative Forcing

Abstract. The global source-receptor relationships of sulfate concentration, direct and indirect radiative forcing (DRF and IRF) from sixteen regions/sectors for years 2010–2014 are examined in this study through utilizing a sulfur source-tagging capability implemented in the Community Earth System Model (CESM) with winds nudged to reanalysis data. Sulfate concentrations are mostly contributed by local emissions in regions with high emissions, while over regions with relatively low SO2 emissions, the near-surface sulfate concentrations are primarily attributed to non-local sources from long-range transport. The export of SO2 and sulfate from Europe contributes 16–20 % of near-surface sulfate concentrations over North Africa, Russia/Belarus/Ukraine (RBU) region and Central Asia. Sources from the Middle East account for 15–24 % of sulfate over North Africa, Southern Africa and Central Asia in winter and autumn, and 19 % over South Asia in spring. Sources in RBU account for 21–42 % of sulfate concentrations over Central Asia. East Asia accounts for about 50 % of sulfate over Southeast Asia in winter and autumn, 15 % over RBU in summer, and 11 % over North America in spring. South Asia contributes to 11–24 % of sulfate over Southeast Asia in winter and spring. Regional source efficiencies of sulfate concentrations are higher over regions with dry atmospheric conditions and less export, suggesting that lifetime of aerosols, together with regional export, is important in determining regional air quality. The simulated global total sulfate DRF is −0.42 W m−2, with  0.31 W m−2 contributed by anthropogenic sulfate and −0.11 W m−2 contributed by natural sulfate, relative to a state with no sulfur emissions. In the Southern Hemisphere tropics, dimethyl sulfide (DMS) contributes 17–84 % to the total DRF. East Asia has the largest contribution of 20–30 % over the Northern Hemisphere mid- and high-latitudes. A 20 % perturbation of sulfate and its precursor emissions gives a sulfate incremental IRF of −0.44 W m−2. DMS has the largest contribution, explaining −0.23 W m−2 of the global sulfate incremental IRF. Incremental IRF over regions in the Southern Hemisphere with low background aerosols is more sensitive to emission perturbation than those over the polluted Northern Hemisphere.

scholarly journals Response to Comment on “Eocene Fagaceae from Patagonia and Gondwanan legacy in Asian rainforests”

Science ◽  
2019 ◽  
Vol 366 (6467) ◽  
pp. eaaz2297
Author(s):  
Peter Wilf ◽  
Kevin C. Nixon ◽  
María A. Gandolfo ◽  
N. Rubén Cúneo
Keyword(s):  
Southern Hemisphere ◽  
Substantial Evidence ◽  
Southern Route

Denk et al. agree that we reported the first fossil Fagaceae from the Southern Hemisphere. We appreciate their general enthusiasm for our findings, but we reject their critiques, which we find misleading and biased. The new fossils unequivocally belong to Castanopsis, and substantial evidence supports our Southern Route to Asia hypothesis.

On The Possibility of an Autonomous History of Modern Southeast Asia

1961 ◽  
Vol 2 (2) ◽  
pp. 73-105 ◽  
Author(s):  
John R. W. Small
Keyword(s):  
Southeast Asia ◽  
Contemporary History ◽  
The Past ◽  
History Of

It is generally accepted that history is an element of culture and the historian a member of society, thus, in Croce's aphorism, that the only true history is contemporary history. It follows from this that when there occur great changes in the contemporary scene, there must also be great changes in historiography, that the vision not merely of the present but also of the past must change.

Southern Hemisphere Seti Survey: Five Years of Project Meta II

1997 ◽  
Vol 161 ◽  
pp. 611-621
Author(s):  
Guillermo A. Lemarchand ◽  
Fernando R. Colomb ◽  
E. Eduardo Hurrell ◽  
Juan Carlos Olalde
Keyword(s):  
Southern Hemisphere ◽  
Scattering Theory ◽  
Galactic Plane ◽  
Narrow Band ◽  
Neutral Hydrogen ◽  
Sky Survey ◽  
Inertial Frames ◽  
Interstellar Scattering ◽  
Extraterrestrial Origin ◽  
Spectral Channels

AbstractProject META II, a full sky survey for artificial narrow-band signals, has been conducted from one of the two 30-m radiotelescopes of the Instituto Argentino de Radioastronomía (IAR). The search was performed near the 1420 Mhz line of neutral hydrogen, using a 8.4 million channels Fourier spectrometer of 0.05 Hz resolution and 400 kHz instantaneous bandwidth. The observing frequency was corrected both for motions with respect to three astronomical inertial frames, and for the effect of Earths rotation, which provides a characteristic changing signature for narrow-band signals of extraterrestrial origin. Among the 2 × 1013spectral channels analyzed, 29 extra-statistical narrow-band events were found, exceeding the average threshold of 1.7 × 10−23Wm−2. The strongest signals that survive culling for terrestrial interference lie in or near the galactic plane. A description of the project META II observing scheme and results is made as well as the possible interpretation of the results using the Cordes-Lazio-Sagan model based in interstellar scattering theory.

Alpha-Effect, Current and Kinetic Helicities for Magnetically Driven Turbulence, and Solar Dynamo

2000 ◽  
Vol 179 ◽  
pp. 387-388
Author(s):  
Gaetano Belvedere ◽  
V. V. Pipin ◽  
G. Rüdiger
Keyword(s):  
Southern Hemisphere ◽  
Northern Hemisphere ◽  
Convection Zone ◽  
Solar Surface ◽  
Momentum Transport ◽  
Angular Momentum Transport ◽  
Magnetic Buoyancy ◽  
Alpha Effect ◽  
Current Helicity

Extended AbstractRecent numerical simulations lead to the result that turbulence is much more magnetically driven than believed. In particular the role ofmagnetic buoyancyappears quite important for the generation ofα-effect and angular momentum transport (Brandenburg & Schmitt 1998). We present results obtained for a turbulence field driven by a (given) Lorentz force in a non-stratified but rotating convection zone. The main result confirms the numerical findings of Brandenburg & Schmitt that in the northern hemisphere theα-effect and the kinetic helicityℋkin= 〈u′ · rotu′〉 are positive (and negative in the northern hemisphere), this being just opposite to what occurs for the current helicityℋcurr= 〈j′ ·B′〉, which is negative in the northern hemisphere (and positive in the southern hemisphere). There has been an increasing number of papers presenting observations of current helicity at the solar surface, all showing that it isnegativein the northern hemisphere and positive in the southern hemisphere (see Rüdigeret al. 2000, also for a review).

The Hemispheric Sign Rule of Current Helicity during the Rising Phase of Cycle 23

2000 ◽  
Vol 179 ◽  
pp. 303-306
Author(s):  
S. D. Bao ◽  
G. X. Ai ◽  
H. Q. Zhang
Keyword(s):  
Solar Cycle ◽  
Southern Hemisphere ◽  
Northern Hemisphere ◽  
Active Regions ◽  
Hemispheric Preference ◽  
Current Helicity

AbstractWe compute the signs of two different current helicity parameters (i.e., αbestandHc) for 87 active regions during the rise of cycle 23. The results indicate that 59% of the active regions in the northern hemisphere have negative αbestand 65% in the southern hemisphere have positive. This is consistent with that of the cycle 22. However, the helicity parameterHcshows a weaker opposite hemispheric preference in the new solar cycle. Possible reasons are discussed.

Sign in / Sign up

Export Citation Format

Share Document