Environmental factors-ecological species group relationships in the Surash lowland-mountain forests in northern Iran

2016 ◽  
Vol 35 (2) ◽  
pp. 240-250 ◽  
Author(s):  
Fatemeh Bazdid Vahdati ◽  
Shahryar Saeidi Mehrvarz ◽  
Daniel C. Dey ◽  
Alireza Naqinezhad
Keyword(s):  
Environmental Factors ◽  
Species Group ◽  
Mountain Forests ◽  
Northern Iran ◽  
Ecological Species Group ◽  
Group Relationships

Effects of species and environmental factors on browsing frequency of young trees in mountain forests affected by natural disturbances

2020 ◽  
Vol 474 ◽  
pp. 118364
Author(s):  
Jerzy Szwagrzyk ◽  
Anna Gazda ◽  
Elżbieta Muter ◽  
Remigiusz Pielech ◽  
Janusz Szewczyk ◽  
...  
Keyword(s):  
Environmental Factors ◽  
Natural Disturbances ◽  
Mountain Forests

A taxonomic account of the Iranian ratsnakes of the Elaphe longissima species-group

1984 ◽  
Vol 5 (2) ◽  
pp. 157-171 ◽  
Author(s):  
Göran Nilson ◽  
Claes Andrén
Keyword(s):  
Species Group ◽  
Colour Pattern ◽  
Morphological Description ◽  
Similar Magnitude ◽  
Museum Collections ◽  
Northern Iran ◽  
Western Iran ◽  
Size Number ◽  
Specific Rank ◽  
Different Parts

In this paper available material of the Elaphe longissima species group from Iran, presented in museum collections or collected by the authors, has been studied. Statistical cluster analyses are applied to this material. Three different taxa (hohenackeri, persica, longissima ssp.) are recognized within this group from Iran. Of three specimens of Elaphe hohenackeri, collected in Iran, two have the "taurica" form of pattern. A comparison with E.hohenackeri from different parts of its range showed that this species is monotypic. The phenetical distance between E.l.persica and non-Iranian E.l.longissma was of similar magnitude as between these two and E.hohenackeri, which motivates a specific rank for persica. Elaphe persica n.comb. is distributed in the Alburz mountains in northern Iran. A morphological description is given on the variable juvenile morph. A recently discovered population of Elaphe longissima in western Iran (Azarbaijan) indicates the occurence of a new diverging morph which differs from E.l.longissima in size, number of ventrals in males, subcaudals in both sexes as well as in some colour pattern.

Environmental factors controlling soil organic carbon storage in loess soils of a subhumid region, northern Iran

Geoderma ◽  
2016 ◽  
Vol 281 ◽  
pp. 1-10 ◽  
Author(s):  
Mohammad Ajami ◽  
Ahmad Heidari ◽  
Farhad Khormali ◽  
Manouchehr Gorji ◽  
Shamsollah Ayoubi
Keyword(s):  
Environmental Factors ◽  
Organic Carbon ◽  
Soil Organic Carbon ◽  
Carbon Storage ◽  
Northern Iran ◽  
Soil Organic Carbon Storage ◽  
Loess Soils ◽  
Organic Carbon Storage

scholarly journals The influence of environmental factors on the distribution and composition of plant species in Oued Charef dam, northeast of Algeria

2020 ◽  
Vol 22 (1) ◽  
Author(s):  
NAOUEL MOUALKI ◽  
Nadhra Sirine
Keyword(s):  
Cluster Analysis ◽  
Environmental Factors ◽  
Species Composition ◽  
Plant Species ◽  
Principal Component ◽  
Species Group ◽  
Terrestrial Species ◽  
North East ◽  
Species Groups ◽  
Ecological Species Groups

Abstract. Moualki N, Boukrouma N. 2021. The influence of environmental factors on the distribution and composition of plant species in Oued Charef dam, North East of Algeria. Biodiversitas 22: 346-353. Identification of the primary factors that influence the ecological distribution of species groups is important to managers of Oued Charef dam in northern Algeria. This study aimed to identify main ecological species groups, describe the site conditions associated with these species groups, and the relationships between environmental factors and the distribution of ecological species groups using Ward’s cluster analysis for classification and principal component analysis (PCA). For this purpose, 50 plots (200 m2 each) were sampled using the Braun- Blanquet method. Soil samples were collected and analyzed to study soil properties. Multivariate analysis methods were used to classify and determine the relationship between species composition and environmental factors and to recognize ecological species groups. The R i386 (version 4.0.3) software was used for data analyzing. Ward's cluster analysis when applied on terrestrial species data gives three groups distinctly distributed on ordination plan. In cluster groups of terrestrial species Group (1) is dominated by Daisies chrysanthemum, Group (2) by Cynodon dactylon L, and Group (3) dominated by Fumana thymifolia. The groups of terrestrial species are readily superimposed on PCA ordination plane. The most important environmental factors associated with terrestrial species composition in Oued Charef dam communities were conductivity (EC), FSA, FSI, clay, salinity, phosphorus (PO4), TN (nitrogen), nitrates (NO3), and nitrites (NO2). While among the edaphic factors only pH showed a negative correlation to plant species this may due to the anthropogenic disturbances however further studies are needed to explore the rest of parts of the said regions. This study gives important insights on ecological relationships between plant biodiversity and soil chemical in a primary wetland ecosystem in northeast of Algeria.

A review of the taxonomy and osteology of the Rhombophryne serratopalpebrosa species group (Anura: Microhylidae) from Madagascar, with comments on the value of volume rendering of micro-CT data to taxonomists

Zootaxa ◽  
2017 ◽  
Vol 4273 (3) ◽  
pp. 301 ◽  
Author(s):  
MARK D. SCHERZ ◽  
OLIVER HAWLITSCHEK ◽  
FRANCO ANDREONE ◽  
ANDOLALAO RAKOTOARISON ◽  
MIGUEL VENCES ◽  
...  
Keyword(s):  
New Species ◽  
Volume Rendering ◽  
Species Group ◽  
Pairwise Distance ◽  
Rrna Gene ◽  
Micro Ct ◽  
Surface Rendering ◽  
Surface Models ◽  
Ct Data ◽  
Group Relationships

Over the last three years, three new species of saw-browed diamond frogs (Rhombophryne serratopalpebrosa species group)—a clade of cophyline microhylid frogs native to northern and eastern Madagascar—have been described. We here review the taxonomy of these frogs based on a new multi-gene phylogeny of the group, which confirms its monophyly but is insufficiently resolved to clarify most intra-group relationships. We confirm Rhombophryne guentherpetersi (Guibé, 1974) to be a member of this group, and we re-describe it based on its type series and newly collected material; the species is characterised by small superciliary spines (overlooked in its original description), as well as large tibial glands and an unusually laterally compressed pectoral girdle. We go on to describe two new species of this group from northern Madagascar: both R. diadema sp. nov. from the Sorata Massif and R. regalis sp. nov. from several sites in the northeast of the island possess three superciliary spines, but they are characterised by several subtle morphological and osteological differences. The new species are separated from all known congeners by an uncorrected pairwise distance of at least 5.1% in a ca. 550 bp fragment of the 16S rRNA gene. In order to highlight the significance of the skeleton in the taxonomy of this group, we provide a detailed description of its generalized osteology based on volume-rendered micro-CT scans of all described members, revisiting already-described skeletons of some species, and describing the skeletons of R. guentherpetersi, R. coronata, and the new taxa for the first time. Use of volume rendering, instead of surface rendering of micro-CT data, resulted in some discrepancies due to the properties of each method. We discuss these inconsistencies and their bearing on the relative value of surface and volume rendering in the taxonomist’s toolkit. We argue that, while surface models are more practical for the reader, volumes are generally a more objective representation of the data. Thus, taxonomic description work should be based on volume rendering when possible, with surface models presented as an aid to the reader. 

scholarly journals SPATIO-STATISTICAL MODELING OF HUMAN BRUCELLOSIS USING ENVIRONMENTAL PARAMETERS: A CASE STUDY OF NORTHERN IRAN

2019 ◽  
Vol XLII-4/W18 ◽  
pp. 969-973
Author(s):  
N. Seyedalizadeh ◽  
A. A. Alesheikh ◽  
M. Ahmadkhani
Keyword(s):  
Public Health ◽  
Environmental Factors ◽  
Environmental Parameters ◽  
Management Plan ◽  
Decision Makers ◽  
Human Brucellosis ◽  
Northern Iran ◽  
The Public ◽  
Control And Management

Abstract. Brucellosis is one of the most important zoonotic diseases which is endemic in Iran. This disease is considered a significant hazard to citizens’ health and imposes heavy economic burdens, hence, requires a thorough control and management plan. The aims of this study are identifying the areas having the highest risk of brucellosis, as well as discovering the contributing environmental factors. The maximum entropy (MaxEnt) method was used to model the probability of brucellosis in Golestan, Mazandaran, and Guilan provinces. The possible contribution of 12 environmental parameters in this disease was also measured using the Jackknife method. The results showed that the highest risk of brucellosis is located in southern Golestan, East, and West of Mazandaran, and south of Guilan province, and moisture, slope, vegetation and elevation are the most effective environmental factors on the spatial distribution of the disease. In addition, the probability of the disease in northern Iran increases from west to east. These findings could assist the public health managers and decision-makers in organizing a more efficient public health system.

scholarly journals Recognition and revision of the Phelister blairi group (Histeridae, Histerinae, Exosternini)

ZooKeys ◽  
2020 ◽  
Vol 1001 ◽  
pp. 1-154
Author(s):  
Michael S. Caterino ◽  
Alexey K. Tishechkin
Keyword(s):  
New Species ◽  
Phylogenetic Analyses ◽  
Species Group ◽  
Incertae Sedis ◽  
Group Relationships

Forty-nine new species of Neotropical Exosternini are described in this work, representing the newly recognized Phelister blairi species group, within the large, heterogeneous taxon Phelister. Eight previously described species are also assigned to this group. Relationships within are indicated with several informal subgroups: P. blairi subgroup: (P. blairi Hinton, 1935, P. erwinisp. nov., P. fimbriatussp. nov., P. stellanssp. nov., P. sparsussp. nov., P. pretiosussp. nov., P. trigonisternus Marseul, 1889, P. globosussp. nov., P. serratussp. nov., P. geminussp. nov., P. paranasp. nov., P. asperatussp. nov., P. uniformissp. nov., P. miscellussp. nov., P. inbiosp. nov., P. sculpturatus Schmidt, 1893, P. tunkisp. nov., P. praedatoris Reichensperger, 1939, P. ifficussp. nov., P. genierisp. nov., P. marginatussp. nov., P. vazdemelloisp. nov., P. dilatatussp. nov., P. spectabilissp. nov., P. pervagatussp. nov.); P. amazoniae subgroup: (P. morbidussp. nov., P. annulatussp. nov., P. sphaericussp. nov., P. geijskesi Kanaar, 1997, P. fraternussp. nov., P. conjunctussp. nov., P. chabooaesp. nov., P. striatinotum Wenzel & Dybas, 1941, P. notandus Schmidt, 1893, P. amazoniae (Lewis, 1898) comb. nov., P. arcuatussp. nov.); P. gregarius subgroup: (P. gregariussp. nov., P. praecisussp. nov., P. rudissp. nov., P. incongruenssp. nov., P. congruenssp. nov., P. praesignissp. nov.); P. umens subgroup: (P. umenssp. nov., P. almeidaesp. nov., P. chicomendesisp. nov., P. microdenssp. nov., P. matatlanticasp. nov.); P. curvipes subgroup: (P. curvipessp. nov., P. vilavelhasp. nov.); P. rio subgroup: (P. riosp. nov., P. semotussp. nov., P. uncinatussp. nov., P. inscriptussp. nov.); incertae sedis – unplaced to subgroup: (P. incertussp. nov., P. okeefeisp. nov., P. blairoidessp. nov., P. piranasp. nov.). Lectotypes are designated for the following species: P. trigonisternus Marseul, P. sculpturatus Schmidt, P. praedatoris Reichensperger, P. notandus Schmidt, and Discoscelis amazoniae Lewis. Preliminary phylogenetic analyses of the broader Neotropical Exosternini do not support the monophyly of the P. blairi group, nor of all of these subgroups, but the majority do fall within one large clade (which is potentially paraphyletic with respect to some other Neotropical exosternine genera). More work on the phylogeny and taxonomy of this diverse fauna is needed.

scholarly journals Typology of native species as the shade tree for merbau (Intsia bijuga) plantations in Papua, Indonesia based on ecological species group

2018 ◽  
Vol 20 (1) ◽  
pp. 43-53
Author(s):  
ELIESER VIKTOR SIRAMI ◽  
DJOKO MARSONO ◽  
RONGGO SADONO ◽  
RONGGO SADONO ◽  
MUHAMMAD ALI IMRON
Keyword(s):  
Native Species ◽  
Mixed Forest ◽  
Soil Nutrient ◽  
Species Group ◽  
Main Function ◽  
Shade Trees ◽  
Shade Tree ◽  
Ecological Species Group ◽  
Ecological Principle ◽  
Complementary And Alternative

Sirami EV, Marsono Dj, Sadono R, Imron MA. 2019. Typology of native species as the shade tree for merbau (Intsia bijuga) plantations in Papua, Indonesia based on ecological species group. Biodiversitas 20: 43-53. Ecological species group is an ecological principle that can be used as a reference in determining the potential native tree species of Papua as the shade trees for merbau in the mixed forest plantations. This research was conducted to identify the potential native trees as the shade for merbau plantation in Papua. The data collection used systematic line technique with hypothetical plot and sampling tree as the plot center. The Dice Index was used to analyze the level of association between merbau and the neighboring trees as well as to serve as a basis for determining ESG and Important Value Index was used to analyze the level of tree dominance. The main potential shade trees consisting of Pometia coriacea Radlk., Lepiniopsis ternatensi Valeton, Spathiostemon javensis Blume, Palaquium amboinense Burck., and Pimelodendron amboinicum Hassk. Whereas complementary and alternative potential shade consisting of Haplolobus lanceolatus H.J.Lam ex Leenh, Haplolobus celebicus H.J.Lam, Horsfieldia laevigata Warb., Horsfieldia irya (Gaertn.)Warb. Prunus costata Kalkman, Sterculia macrophylla Vent., Dysoxylum mollissimum Blume, Pertusadina multifolia (Havil.) Ridsdale, Streblus elongatus (Miq.) Corner and Geijera salicifolia Schott. The main shade trees possessed a main function for rendering shade toward younger merbau in the plantation area. Meanwhile, complementary and alternative shade trees were intended for increasing soil nutrient availability and optimizing microclimate surround merbau seedlings.

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