scholarly journals The critical condition of hutias in Cuba

Oryx ◽  
1991 ◽  
Vol 25 (4) ◽  
pp. 206-208 ◽  
Author(s):  
Vicente Berovides Alvarez ◽  
Antonio Comas González
Keyword(s):  
Endemic Species ◽  
Critical Condition ◽  
The Other ◽  
Historical Range ◽  
Grave Danger

Cuba is home for 10 endemic species of hutia. Three of these have become scarce, or extinct, in some parts of their historical range, but remain sufficiently abundant elsewhere to make their conservation of no immediate concern. Of the other seven species, one is believed to be extinct and the rest are in grave danger. The pressures they face include capture by man, competition with introduced rats and destuction of their habitat. Urgent measures are required if these species are to survive.

scholarly journals Rediscovery of Scorzonera amasiana Hausskn. and Bornm. - A threatened endemic species in Turkey

1970 ◽  
Vol 36 (2) ◽  
pp. 139-144 ◽  
Author(s):  
Fergan Karaer ◽  
Ferhat Celep
Keyword(s):  
Endemic Species ◽  
Human Impacts ◽  
Conservation Status ◽  
The Other ◽  
Conservation Strategies ◽  
Small Populations ◽  
Distribution Map ◽  
Type Specimens ◽  
Current Conservation ◽  
Iucn Criteria

Scorzonera amasiana Hausskn. and Bornm. was described from type specimens collected by J.F.N. Bornmueller in 1889 but it was not collected again until 1993, when it was found near Amasya, Turkey. Populations of S. amasiana were quite small at that limited locations and were vulnerable to human impacts. Therefore, suitable conservation strategies should be developed immediately in order to protect the species from probable extinction. Here, an additional three small populations are reported. Brief history, morphology, habitat and ecology of this endemic species have been discussed. Its current conservation status was reevaluated with respect to the latest IUCN criteria. A key to distinguish it from the other closely related Turkish species is also provided and its distribution map is appended.   Key words: Endangered, Rediscovery, Scorzonera, Turkey DOI = 10.3329/bjb.v36i2.1502 Bangladesh J. Bot. 36(2): 139-144, 2007 (December)

scholarly journals Comparative analysis of populations of the Balkan endemic species Daphne malyana Blecic (Thymeleaceae)

2010 ◽  
Vol 62 (4) ◽  
pp. 1151-1162 ◽  
Author(s):  
Marina Juskovic ◽  
P. Vasiljevic ◽  
V. Randjelovic ◽  
V. Stevanovic ◽  
Branka Stevanovic
Keyword(s):  
Principal Component Analysis ◽  
Comparative Analysis ◽  
Endemic Species ◽  
Morphological Variability ◽  
Principal Component ◽  
Balkan Peninsula ◽  
Canonical Discriminant Analysis ◽  
The Other ◽  
Isolated Populations ◽  
Microclimate Conditions

Daphne malyana Blecic (Thymeleaceae) is an endemic species of the western part of the Balkan Peninsula, distributed in the mountains, canyons and gorges of N. Montenegro, E. Bosnia and W. Serbia. The comparative morphoanatomic investigations have included four distantly separated populations of the species D. malyana, i.e. two from Serbia, from the ravines of Sokoline and Vranjak on Mt. Tara, and two from Montenegro, in the canyons of the Tara and Piva rivers. Comparative morphoanatomical studies have shown the presence of general adaptive characteristics of a specific, conservative xeromorphic type, slightly differing in each population. Principal component analysis (PCA) and canonical discriminant analysis (CDA) of 20 morphoanatomical characteristics of the leaves and stems have shown a clear distinction between the populations from the river Piva canyon (Montenegro) and those from the Sokoline ravine (Serbia), on one side, and those of Vranjak gorge (Serbia) and of the river Tara canyon (Montenegro) on the other side. It may be assumed that the mild morphological variability of the isolated populations of the Balkan endemic species D. malyana in the canyons and gorges seem to have been affected by the microclimate conditions in their habitats.

On the Mechanism and the Rate of Sub-Ground Erosion in the Loess Material

2011 ◽  
Vol 233-235 ◽  
pp. 2528-2531 ◽  
Author(s):  
Xi An Li ◽  
Qiang Xu ◽  
Hong Zhou Lin ◽  
Wan Jun Ye
Keyword(s):  
Critical Condition ◽  
Theoretical Basis ◽  
Field Survey ◽  
Influential Factors ◽  
The Other ◽  
Initial Water Content ◽  
Key Factors ◽  
Erosion Process ◽  
Initial Water ◽  
The Relationship

Sub-ground erosion often resulted in severe problems in various engineering constructions, most of which is due to the sub-erosion in loess. In this paper, the critical condition of “soil bursting” was analyzed and the formula describing the critical condition of soil bursting was derivated by the analytical method. Furthermore, the velocity of tunnel-erosion in loess and its influential factors were studied. A set of tests are designed to study the relationship between the tunnel-erosion velocity and the key influential factors. The key factors considered in the test include soil density as well as the initial water content. The other purpose is to reveal the characteristics of the tunnel-erosion process. Phenomena observed during the tests together with the data from field survey revealed the mechanism of tunneling in loess very well, and the work in this paper formed a theoretical basis for further study about sub-ground erosion in loess.

scholarly journals Volatile Components of Two Endemic Species from the Apuan Alps (Tuscany, Italy), Centaurea Arachnoidea and C. Montis-Borlae (Asteraceae)

2010 ◽  
Vol 5 (8) ◽  
pp. 1934578X1000500
Author(s):  
Lucia Viegi ◽  
Mirko Boracchia ◽  
Roberto Cecotti ◽  
Aldo Tava
Keyword(s):  
Essential Oil ◽  
Endemic Species ◽  
Steam Distillation ◽  
The Other ◽  
Volatile Components ◽  
Qualitative And Quantitative ◽  
Fresh Material ◽  
Total Oil ◽  
Species Specific ◽  
Apuan Alps

The volatile fractions of Centaurea arachnoidea and C. montis-borlae, two endemic species growing wild in the Apuan Alps (Tuscany, Italy), were isolated by steam distillation from fresh leaves and flowerheads, and analyzed by GC/FID and GC/MS. The yield of essential oil ranged from 0.01% to 0.09% of fresh material. A wide variety of volatile compounds was detected in the examined plant species and organs, both in qualitative and quantitative terms. Sesquiterpenes were the major constituents, ranging from 18.9% to 73.2% of the total oil. Alcohols (1.6-25.8%), aldehydes (1.5-12.0%), hydrocarbons (1.8-11.9%), acids (0.2-25.4%), esters (0.2-1.3%), monoterpenes (0.7-1.4%), and miscellaneous compounds (0.6-2.6%), were also detected in variable amounts in all different sample tissues. A series of unidentified compounds was also isolated from the two species, both in leaves and flowerheads, accounting for 2.4-6.7% of the total oil. According to MS spectral data, these substances were likely to be polyunsaturated compounds; moreover, they appear to be species-specific, as their presence was only detected in either one or the other Centaurea species.

The reproduction of the Apennine yellow-bellied toad (Bombina pachypus) in central Italy

2009 ◽  
Vol 30 (3) ◽  
pp. 303-312 ◽  
Author(s):  
Alberto Venchi ◽  
Mario Melletti ◽  
Marzia Mirabile ◽  
Marco Bologna
Keyword(s):  
Reproductive Success ◽  
Endemic Species ◽  
National Park ◽  
Central Italy ◽  
The Other ◽  
Temporary Ponds ◽  
Progressive Decline ◽  
Ephemeral Ponds ◽  
Grazing Area ◽  
Desiccation Risk

AbstractAmphibians are declining worldwide and many species are threatened for unknown reasons. In fact, information on ecology of several species are not available due to the lack of studies. The Apennine yellow-bellied toad (Bombina pachypus) is an Italian endemic species in progressive decline in many areas, often for unclear reasons. A two-year study of 116 temporary ponds in a grazing area of the Majella National Park (central Italy) from 2001 to 2002 revealed that: (a) Apennine yellow-bellied toads reproduced in small ponds characterized by high desiccation risk; (b) breeding activity occurred for a prolonged period (at least from May to the beginning of August), during which females spawned clutches of very few eggs in several, successive events; (c) the reproductive success was very low especially because of high egg mortality; and (d) the main cause of mortality was the desiccation of ponds. Consequently, the characteristics of breeding areas (i.e., small, ephemeral ponds) are the most important feature influencing the reproduction. The safeguard of temporary ponds is crucial for the conservation of this amphibian and could preserve also the other species using these pools.

A new, narrowly endemic species of Blumenbachia (Loasaceae subfam. Loasoideae) from Brazil

Phytotaxa ◽  
2015 ◽  
Vol 236 (2) ◽  
pp. 196 ◽  
Author(s):  
Tilo Henning ◽  
Samuel Siriani De Oliveira ◽  
Clemens Schlindwein ◽  
Maximilian Weigend
Keyword(s):  
New Species ◽  
South America ◽  
Endemic Species ◽  
Leaf Morphology ◽  
The Other ◽  
Flower Size ◽  
Unique Combination ◽  
Southern South America ◽  
In The Wild ◽  
A New Species

The genus Blumenbachia is restricted to Southern South America and comprises 10 species. Within that genus, monophyletic B. sect. Blumenbachia is a clearly delimited group of four previously known species. Here, a new species from Minas Gerais, Brazil, is described. Blumenbachia amana differs from the known species in ovoidal (versus spherical) capsules and in the unique combination of the inflorescence characters of B. insignis with the leaf morphology of B. latifolia, while approaching the flower size of B. catarinensis. Like all its close allies, the new species is facultatively autogamous, but pollinated by a highly specialized pollinator in the wild. It is geographically isolated from the other species and only known from two collections sites.

Verbascum shahsavarensis (Scrophulariaceae), a new species for Flora of Iran

Phytotaxa ◽  
2015 ◽  
Vol 203 (1) ◽  
pp. 76 ◽  
Author(s):  
Arash SOTOODEH ◽  
Laure Civeyrel ◽  
Farideh Attar
Keyword(s):  
New Species ◽  
Endemic Species ◽  
Caspian Sea ◽  
The Other ◽  
Distribution Map ◽  
Flora Of Iran ◽  
The Caspian Sea ◽  
Coastal City ◽  
North Of Iran ◽  
A New Species

A new endemic species, Verbascum shahsavarensis, is described from north of Iran. Based on two unique characters of this species, these being two anterior longitudinally obliquely inserted anthers and an ebracteolate pedicel, we compared it to species described by Murbeck in 1933. The new species can be easily distinguished from the other Iranian species by having bi-colored hairs on the stamen filaments and the unique anther and pedicel characters. A distribution map is provided. The name of new species comes from Shahsavar, the ancient name of Tonekabon, an old coastal city on the Caspian Sea.

Multiple records and polymorphism of Parastichopus regalis (Cuvier, 1817) (Echinodermata: Holothuroidea: Stichopodidae) along the Algerian coast

Zootaxa ◽  
2021 ◽  
Vol 5032 (4) ◽  
pp. 549-562
Author(s):  
IHCENE KHODJA ◽  
KARIM MEZALI ◽  
AHMED S. THANDAR
Keyword(s):  
Statistical Analysis ◽  
Mediterranean Sea ◽  
Endemic Species ◽  
Body Wall ◽  
Dorsal Surface ◽  
The Body ◽  
The Other ◽  
Disk Diameter ◽  
The Family ◽  
Algerian Coast

The family Stichopodidae is represented in the Mediterranean Sea by the genus Parastichopus which includes two non-endemic species; Parastichopus tremulus (Gunnerus, 1767) and Parastichopus regalis (Cuvier, 1817). On the Algerian coast (southwestern Mediterranean Sea), two morphotypes of P. regalis were observed, one with dark spots on the dorsal surface and the other non-spotted. In total, 65 individuals of P. regalis were recorded from 22 stations along the Algerian coast during an oceanographic campaign. Twelve individuals (6 of each morphotype) were used for a comparative study of the morphological (including endoskeletal) characteristics. Table ossicles, the only ossicles of the body wall of the two morphotypes of P. regalis, are here compared with regard to the disk diameter of the tables and the total area of the surface of the disc. Statistical analysis did not show any significant differences between the spotted and the non-spotted morphotypes.  

Revision of the genus Costularia (Cyperaceae: Schoeneae) for the flora of the Seychelles, including the rediscovery and resurrection of a rare endemic species

Phytotaxa ◽  
2015 ◽  
Vol 231 (1) ◽  
pp. 31 ◽  
Author(s):  
Bruno Senterre ◽  
Elvina Henriette ◽  
Isabel Larridon ◽  
Charles Morel ◽  
Paul Goetghebeur
Keyword(s):  
Endemic Species ◽  
Original Description ◽  
Iucn Red List ◽  
The Other ◽  
Careful Examination ◽  
Close Relative ◽  
Herbarium Specimens ◽  
Iucn Red List Categories ◽  
Unknown Species ◽  
Taxonomic Studies

Knowledge of the monocot flora of the Seychelles remains relatively weak and new taxonomic studies, including both herbarium specimens and field observations, are needed. Extensive new explorations in the key biodiversity areas of the Seychelles granitic islands resulted in the discovery of an unknown species of Costularia. After careful examination of existing specimens and literature within that genus, we concluded that the unknown plant corresponds to the type of Cladium xipholepis, a species endemic to the Seychelles which had previously been confused and put into synonymy with two unrelated taxa, i.e. the other Seychelles endemic Costularia hornei and the Mascarene species C. melicoides. These confusions were due to the immature state of the type of Cladium xipholepis, which was the only known specimen of the species. The name Cladium xipholepis is here resurrected and combined in the genus Costularia, adding one endemic species to the flora of the Seychelles. In addition, a detailed description is provided, correcting important errors regarding diagnostic characters made in the original description. Costularia xipholepis is a rare species, occurring on lower montane inselbergs of Mahé Island, and is here proposed as endangered (EN) according to IUCN Red List categories and criteria. It is morphologically closely related to C. pantopoda var. baronii from Madagascar. The other Seychelles endemic Costularia, C. hornei (lectotype designated here), has no close relative and belongs to a group distributed in South-East Asia. We discuss these results in relation to the origins of the flora of the Seychelles. Finally, the previously thought endemic variety Costularia hornei var. rectirhachilloidea was also reviewed and we consider it to be identical to the type variety, but based on specimens at an earlier stage of spikelet development. These discoveries, along with other preliminary studies, indicate that more studies are needed to review the monocots of the Seychelles, particularly Cyperaceae, Orchidaceae and Poaceae.

Review and analysis of altitudinal distribution of the Andean anurans in Colombia

Zootaxa ◽  
2008 ◽  
Vol 1826 (1) ◽  
pp. 1 ◽  
Author(s):  
MANUEL HERNANDO BERNAL ◽  
JOHN D. LYNCH
Keyword(s):  
Frequency Distribution ◽  
Endemic Species ◽  
Thermal Tolerance ◽  
The Other ◽  
Jaccard Similarity ◽  
Altitudinal Distribution ◽  
Cordillera Central ◽  
Altitudinal Range ◽  
Similarity Indices ◽  
Altitudinal Distributions

In the following work we examine the richness and altitudinal distribution of Colombian Andean anurans trying to emphasize patterns of distribution. We also supply an updated checklist of Andean anurans in Colombia. At present, Colombian harbors about 396 Andean frogs: 153 species in the Cordillera Occidental, 187 species in the Cordillera Central, and 131 species in the Cordillera Oriental. Of these, the Cordillera Oriental presents the higher number and percentage of endemic species. The frequency distribution of altitudinal ranges for Colombian Andean frogs shows that the majority of species have narrow altitudinal ranges, less than 500 m altitude, and only a few species have broad altitudinal distributions. On the other hand, lowland species have broader altitudinal ranges than do highland species. The hypothesis of a wider altitudinal range of highland anurans is therefore not supported. Finally, the averages of the Jaccard similarity indices for the Andean anurans along altitudinal gradients in Colombian are approximately similar to those of other tropical anurans reported by Huey (1978), but notably lower than those of anurans of temperate localities. Thus, these results are in concordance with Janzen's hypothesis (1967) about a broader altitudinal range for temperate species, likely because of their higher thermal tolerance.

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