scholarly journals A preliminary study on the distribution patterns of endemic species of Fulgoromorpha (Hemiptera, Auchenorrhyncha) in Iran

ZooKeys ◽  
2013 ◽  
Vol 319 ◽  
pp. 231-248 ◽  
Author(s):  
Fariba Mozaffarian
Keyword(s):  
Endemic Species ◽  
Distribution Patterns ◽  
Preliminary Study

scholarly journals The Sinking of Another Tristan da Cunha Moss Endemic and Its Phytogeographical Consequences

2020 ◽  
Vol 89 (3) ◽  
Author(s):  
Ryszard Ochyra ◽  
Vítězslav Plášek
Keyword(s):  
Atlantic Ocean ◽  
Southern Hemisphere ◽  
Endemic Species ◽  
Distribution Patterns ◽  
South Atlantic ◽  
South Atlantic Ocean ◽  
Original Material ◽  
The Third ◽  
Tristan Da Cunha ◽  
Central South

<p>The original material of <em>Isopterygium tristaniense </em>Dixon, an endemic species of the Tristan da Cunha archipelago in the central South Atlantic Ocean, is taxonomically evaluated and some details of its morphology are illustrated. The species is found to be conspecific with the Holarctic <em>Pseudotaxiphyllum elegans </em>(Brid.) Z.Iwats. and it is the third record of the species in the Southern Hemisphere. The global distribution of this species is reviewed and the distribution patterns of the South Atlantic mosses are briefly discussed.</p>

The elevation gradient of lichen species richness in Nepal

2009 ◽  
Vol 42 (1) ◽  
pp. 83-96 ◽  
Author(s):  
Chitra Bahadur BANIYA ◽  
Torstein SOLHØY ◽  
Yngvar GAUSLAA ◽  
Michael W. PALMER
Keyword(s):  
Species Richness ◽  
Endemic Species ◽  
Elevation Gradient ◽  
Distribution Patterns ◽  
Lichen Species ◽  
Ecological Niches ◽  
Published Data ◽  
Elevation Gradients ◽  
Wide Range ◽  
Taxonomic Groups

AbstractThis study of elevation gradients of lichen species richness in Nepal aimed to compare distribution patterns of different life-forms, substratum affinities, photobiont types, and Nepalese endemism. Distribution patterns of lichens were compared with elevational patterns shown by a wide range of taxonomic groups of plants along the Nepalese Himalayan elevational gradient between 200–7400m. We used published data on the elevation records of 525 Nepalese lichen species to interpolate presence between the maximum and minimum recorded elevations, thereby giving estimates of lichen species richness at each 100-m elevational band. The observed patterns were compared with previously published patterns for other taxonomic groups. The total number of lichens as well as the number of endemic species (55 spp.) showed humped relationships with elevation. Their highest richness was observed between 3100–3400 and 4000–4100m, respectively. Almost 33% of the total lichens and 53% of the endemic species occurred above the treeline (>4300m). Non-endemic richness had the same response as the total richness. All growth forms showed a unimodal relationship of richness with elevation, with crustose lichens having a peak at higher elevations (4100–4200m) than fruticose and foliose lichens. Algal and cyanobacterial lichen richness, as well as corticolous lichen richness, all exhibited unimodal patterns, whereas saxicolous and terricolous lichen richness exhibited slightly bimodal relationships with elevation. The highest lichen richness at mid altitudes concurred with the highest diversity of ecological niches in terms of spatial heterogeneity in rainfall, temperature, cloud formation, as well as high phorophyte abundance and diversity implying large variation in bark roughness, moisture retention capacity, and pH. The slightly bimodal distributions of saxicolous and terricolous lichens were depressed at the elevational maximum of corticolous lichens.

Distribution patterns in the genus Peltigera Willd

2003 ◽  
Vol 35 (4) ◽  
pp. 301-323 ◽  
Author(s):  
Isabel Martínez ◽  
Ana Rosa Burgaz ◽  
Orvo Vitikainen ◽  
Adrián Escudero
Keyword(s):  
Southern Hemisphere ◽  
Hierarchical Clustering ◽  
Endemic Species ◽  
Distribution Patterns ◽  
Similar Distribution ◽  
Number Of Species ◽  
Biogeographic Provinces ◽  
Floristic Elements ◽  
Clustering Approach ◽  
Holarctic Species

AbstractThe distribution of sixty-six Peltigera species in 230 biogeographic provinces or 40 regions are presented. A hierarchical clustering approach, used to identify clusters of species with similar distribution patterns (floristic elements), resolved four groups made up of Neotropical, Southern Hemisphere, Antarctic and mainly Holarctic species. The Holarctic Kingdom is species rich with the highest number of Peltigera species and also the highest number of endemic species; the Australian and Cape Kingdoms have the lowest number of species and endemics. The species rich provinces are briefly discussed.

scholarly journals Preliminary checklist of spider fauna (Araneae: Arachnida) of Chandranath Hill, Goa, India

2020 ◽  
Vol 12 (11) ◽  
pp. 16597-16606
Author(s):  
Rupali Pandit ◽  
Mangirish Dharwadkar
Keyword(s):  
Species Diversity ◽  
Structure Analysis ◽  
Endemic Species ◽  
Feeding Guilds ◽  
Guild Structure ◽  
The Future ◽  
Preliminary Study

The present investigation is a very first attempt to generate the checklist of spiders from Chandranath Hill, Paroda, Quepem, Goa.  A preliminary study was conducted from June 2018 to March 2020 to document the spider diversity from the region.  In all, 125 species of spiders belonging to 102 genera from 19 families were identified.  The dominant families were Salticidae followed by Araneidae.  Guild structure analysis revealed six feeding guilds, namely, orb weavers, foliage runners, ground runners, stalkers, space-web builders and ambushers.  This study has not only highlighted the need for conservation of this ecosystem due to the significant species diversity and endemic species but has also filled the lacuna of spider study in Goa to form the foundation for further investigation.  Extensive research on the spiders from Chandranath Hill in the future can certainly expect further new discoveries.  

scholarly journals A preliminary study on impacts of the elevation on plants' distribution patterns in seasonal wetland of Lake Napahai

2015 ◽  
Vol 27 (3) ◽  
pp. 392-400
Author(s):  
CHEN Jian ◽  
◽  
MIAO Fujun ◽  
YANG Wenzhong ◽  
YUAN Xiaolong ◽  
...  
Keyword(s):  
Distribution Patterns ◽  
Seasonal Wetland ◽  
Preliminary Study

Orchids of the Occupied Palestinian Territories (West Bank, Palestine)

2021 ◽  
Vol 42 ◽  
pp. e72120
Author(s):  
Julius Pahl ◽  
Mazin B. Qumsiyeh
Keyword(s):  
Spatial Data ◽  
Agricultural Land ◽  
New Records ◽  
Historical Data ◽  
Distribution Patterns ◽  
Dead Sea ◽  
Palestinian Territories ◽  
The Past ◽  
Preliminary Study ◽  
Using Data

Literature data and new records of members of the orchid family (Orchidaceae) in the Occupied Palestinian Territories were reviewed and updated with field data. Using data from the Palestine Museum of Natural History (PMNH), data from fellow botanists, and the Biodiversity databases (BioGIS and GBIF), the distribution patterns were analyzed with the QGIS package. Twenty-three taxa of eight genera were found in this preliminary study. For two species, no recent data from the last 20 years were available and in some cases likely declined due to human activity. Most species are from the Mediterranean phytogeographical zone, Epipactis veratrifolia Boiss. & Hohen was found in the Sudanian-Ethiopian zone (Dead Sea valley). The majority of the species found prefer semi-open shrublands (garrigue). Nine species had fewer than 20 records overall. Trends observed from the historical data, and current spatial data revealed major threats, including habitat fragmentation, urbanization, intensification of agricultural land use, afforestation and reduced precipitation due to global warming. We noted the proximity to thorny shrubs in many species indicating pressure by grazing animals during field visits. As recent data is scarce, surveys of sites where rare species have been encountered in the past are recommended, and measures to protect vulnerable populations are discussed.

scholarly journals Depth Distribution of 137Cs in Anthrosol from the Experimental Field “Radmilovac” Near Belgrade, Serbia

2013 ◽  
Vol 64 (3) ◽  
pp. 425-430 ◽  
Author(s):  
Ivana Vukašinović ◽  
Dragana Todorović ◽  
Aleksandar Đorđević ◽  
Miloš B. Rajković ◽  
Vladimir B. Pavlović
Keyword(s):  
Depth Distribution ◽  
Soil Depth ◽  
Humus Content ◽  
Distribution Patterns ◽  
Mineral Fertilizers ◽  
Tree Plantation ◽  
Soil Mixing ◽  
Experimental Field ◽  
Preliminary Study ◽  
Plough Layer

Abstract This is a preliminary study of the depth distribution of 137Cs radionuclides in cultivated anthrosol soil of a 15-year old peach tree plantation at the experimental field “Radmilovac” near Belgrade. Before planting, the soil was ploughed at the depth of 1 m. The soil had not been annually ploughed, irrigated and treated with mineral fertilizers for three years before sampling. Activity concentration for 137Cs ranged from 1.8 Bq kg-1 to 35 Bq kg-1. Along the soil depth it varied highly, reaching as high a total variation coefficient as 83 %. Radiocaesium distribution patterns depended on the extent of soil mixing in the plough layer, as it was mechanically transferred from the surface to the lower soil layers during cultivation. 137Cs was associated with humus content and fixation to clay fractions in the soil. Our results single out soil’s hygroscopic water as a valuable parameter for 137Cs behaviour that could be used commonly if the measurement is standardised.

Sign in / Sign up

Export Citation Format

Share Document