scholarly journals Speciation along a latitudinal gradient: The origin of the Neotropical cycad sister pair Dioon sonorense – D. vovidesii (Zamiaceae)

2021 ◽  
Author(s):  
José Said Gutiérrez‐Ortega ◽  
Francisco Molina‐Freaner ◽  
José F. Martínez ◽  
Miguel Angel Pérez‐Farrera ◽  
Andrew P. Vovides ◽  
...  
Keyword(s):  
Latitudinal Gradient ◽  
Sister Pair

The family Orthotrichaceae (Bryophyta) in flora of Russia: results of revision and biogeographical review

2018 ◽  
Vol 52 (2) ◽  
pp. 519-534 ◽  
Author(s):  
V. E. Fedosov
Keyword(s):  
Hot Spots ◽  
Latitudinal Gradient ◽  
Hot Spot ◽  
Spatial Differentiation ◽  
Taxonomic Composition ◽  
Undescribed Species ◽  
Longitudinal Gradient ◽  
Biogeographic Pattern ◽  
The Family ◽  
North Pacific Region

Recent studies on Orthotrichoid mosses in Russia are summarized genus by genus. Orthotrichum furcatum Otnyukova is synonymized with Nyholmiella obtusifolia. Orthotrichum vittii is excluded from the Russian moss flora. Description of O. dagestanicum is amended. Fifty four currently recognized species from 9 genera of the Orthotrichaceae are presently known to occur in Russia; list of species with common synonyms and brief review of distribution in Russia is presented. Numerous problematic specimens with unresolved taxonomy were omitted for future. Revealed taxonomical inconsistencies in the genera Zygodon, Ulota, Lewinskya, Nyholmiella, Orthotrichum are briefly discussed. Main regularities of spatial differentiation of the family Orthotrichaceae in Russia are considered. Recently presented novelties contribute to the certain biogeographic pattern, indicating three different centers of diversity of the family, changing along longitudinal gradient. Unlike European one, continental Asian diversity of Orthotrichaceae is still poorly known, the Siberian specimens which were previously referred to European species in most cases were found to represent other, poorly known or undescribed species. North Pacific Region houses peculiar and poorly understood hot spot of diversity of Orthotrichoid mosses. Thus, these hot spots are obligatory to be sampled in course of revisions of particular groups, since they likely comprise under-recorded cryptic- or semi-cryptic species. Latitudinal gradient also contributes to the spatial differentiation of the revealed taxonomic composition of Orthotrichaceae.

Nest Orientation in Closed Nests of Passeriformes across a Latitudinal Gradient in the Southern Neotropic

2020 ◽  
Vol 54 (2) ◽  
pp. 263
Author(s):  
Alejandro A. Schaaf ◽  
Cecilia G. Garcia ◽  
Harold F. Greeney
Keyword(s):  
Latitudinal Gradient

scholarly journals Distribution of saltmarsh plant communities associated with environmental factors along a latitudinal gradient on the south-west Atlantic coast

2006 ◽  
Vol 33 (5) ◽  
pp. 888-900 ◽  
Author(s):  
J. P. Isacch ◽  
C. S. B. Costa ◽  
L. Rodriguez-Gallego ◽  
D. Conde ◽  
M. Escapa ◽  
...  
Keyword(s):  
Environmental Factors ◽  
Plant Communities ◽  
Latitudinal Gradient ◽  
Atlantic Coast ◽  
The South ◽  
South West

Diversity patterns and drivers of methanotrophic gene distributions in forest soils across a large latitudinal gradient

2021 ◽  
Author(s):  
Yongping Kou ◽  
Wenqiang Zhao ◽  
Yanjiao Liu ◽  
Yanhong Wu ◽  
Jiangtao Xiao ◽  
...  
Keyword(s):  
Forest Soils ◽  
Latitudinal Gradient ◽  
Diversity Patterns

Multiple sclerosis prevalence in Malaga, Southern Spain estimated by the capture–recapture method

2011 ◽  
Vol 18 (3) ◽  
pp. 372-376 ◽  
Author(s):  
O Fernández ◽  
V Fernández ◽  
M Guerrero ◽  
A León ◽  
JC López-Madrona ◽  
...  
Keyword(s):  
Multiple Sclerosis ◽  
Prevalence Rate ◽  
Latitudinal Gradient ◽  
Southern Spain ◽  
Median Frequency ◽  
Mediterranean Countries ◽  
Current Prevalence ◽  
Capture Recapture ◽  
High Figure ◽  
Southern European Countries

Background: Although not definitively proven, there is commonly accepted to be a latitudinal gradient in the distribution of multiple sclerosis (MS), which is more frequent in temperate zones. The European Mediterranean countries are situated in a zone of median frequency, although ever increasing figures have been noted in the last decades. Objective: The objective of this study was to assess the current prevalence rate of MS in the province of Malaga, Southern Spain. Methods: The capture–recapture method (CRM) uses independent sources of data and permits the number of non-registered cases of a given disease to be estimated, and by doing so, to avoid ascertainment bias. Results: Use of this method showed the estimated prevalence rate of MS in the province of Malaga, Southern Spain, to be 125/105 (95% confidence interval: 102/105–169/105), higher than the figures published previously. Conclusions: Although we recognize that these data need to be confirmed in further studies and in other areas of the country using a similar method, we believe this study is the first to find such high figure of prevalence, being very similar to the figures reported in recent years in other southern European countries.

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