scholarly journals Anatomical investigations on Turkish critically endangered species: Achillea sivasica Çelik et Akpulat (Asteraceae)

2020 ◽  
Vol 80 (1) ◽  
Author(s):  
Mehmet Tekin ◽  
Şeyda Akdere
Keyword(s):  
Cross Section ◽  
Vascular Bundle ◽  
Early Stage ◽  
Secondary Growth ◽  
Critically Endangered ◽  
Secretory Cells ◽  
Leaf Lamina ◽  
Critically Endangered Species ◽  
Secretory Ducts ◽  
Leaf Midrib

In this study, root, stem, leaf midrib and leaf lamina anatomy and achene micromorphology of Turkish critically endangered endemic Achillea sivasica were investigated for the first time. In this study, the root was found in late primary growth and in early secondary growth stage. It has large cortex layer consisting of 12-16 cell rows beneath the periderm. Secretory ducts formed by 5-12 secretory cells embedded in the cortex and located near vascular bundle were found at the root that is in early stage of secondary development. The stem was circular-pentagonal shaped in cross-section. There was lamellar collenchyma beneath epidermis of pentagon corners, and cortex parenchyma between corners. Secretory ducts located near the phloem, between the cortex and endodermis on the interfascicular region, were also observed. Endodermis layer was evident and its cells have indentations and protrusions where they touch adjacent endodermis cells, which strengthen the connection between them. In addition, casparian strips was conspicuous in many endodermis cells. Leaf midrib area was triangular shaped in cross section. There were secretory ducts, consisting of 4-5 secretory cells observed on both sides of the sclerenchymatous fibers which accompaning xylem. The leaf lamina was amphistomatic and stomata type was anomocytic. Mesophyll layer was equifacial. There was a large secretory duct and its diameter is bigger than the nearest main lamina vascular bundle. Achene shape was lanceolate-oblong and its surface was ribbed and glabrous of A. sivasica.

Where have all the sawfishes gone? Perspectives on declines of these Critically Endangered species in Sri Lanka

2021 ◽  
Author(s):  
Akshay Tanna ◽  
Daniel Fernando ◽  
Ramajeyam Gobiraj ◽  
Buddhi M. Pathirana ◽  
Sahan Thilakaratna ◽  
...  
Keyword(s):  
Sri Lanka ◽  
Endangered Species ◽  
Critically Endangered ◽  
Critically Endangered Species

scholarly journals The Oral Bacterial Community in Melanophryniscus admirabilis (Admirable Red-Belly Toads): Implications for Conservation

2021 ◽  
Vol 9 (2) ◽  
pp. 220
Author(s):  
Michele Bertoni Mann ◽  
Janira Prichula ◽  
Ícaro Maia Santos de Castro ◽  
Juliana Mello Severo ◽  
Michelle Abadie ◽  
...  
Keyword(s):  
Endangered Species ◽  
Bacterial Community ◽  
High Throughput Sequencing ◽  
Dietary Diversity ◽  
Natural Habitat ◽  
Critically Endangered ◽  
Personal Genome ◽  
Oral Microbiota ◽  
Critically Endangered Species ◽  
Anthropogenic Environment

Melanophryniscus admirabilis (admirable red-belly toad) is a microendemic and critically endangered species found exclusively along 700 m of the Forqueta River, in a fragment of the Atlantic Forest of southern Brazil. One of the greatest concerns regarding the conservation of this species is the extensive use of pesticides in areas surrounding their natural habitat. In recent years, the adaptation and persistence of animal species in human-impacted environments have been associated with microbiota. Therefore, the present study aimed to characterize the oral bacterial community of wild M. admirabilis and to address the question of how this community might contribute to this toad’s adaptation in the anthropogenic environment as well as its general metabolic capabilities. A total of 11 oral samples collected from wild M. admirabilis were characterized and analyzed via high-throughput sequencing. Fragments of the 16S rRNA variable region 4 (V4) were amplified, and sequencing was conducted using an Ion Personal Genome Machine (PGM) System with 316 chips. A total of 181,350 sequences were obtained, resulting in 16 phyla, 34 classes, 39 orders, and 77 families. Proteobacteria dominated (53%) the oral microbiota of toads, followed by Firmicutes (18%), Bacteroidetes (17%), and Actinobacteria (5%). No significant differences in microbial community profile from among the samples were reported, which suggests that the low dietary diversity observed in this population may directly influence the bacterial composition. Inferences of microbiome function were performed using PICRUSt2 software. Important pathways (e.g., xenobiotic degradation pathways for pesticides and aromatic phenolic compounds) were detected, which suggests that the bacterial communities may serve important roles in M. admirabilis health and survival in the anthropogenic environment. Overall, our results have important implications for the conservation and management of this microendemic and critically endangered species.

scholarly journals High survival rate of a critically endangered species, the Azores Bullfinch Pyrrhula murina, as a contribution to population recovery

2010 ◽  
Vol 151 (3) ◽  
pp. 627-636 ◽  
Author(s):  
David Monticelli ◽  
Ricardo Ceia ◽  
Ruben Heleno ◽  
Hugo Laborda ◽  
Sergio Timóteo ◽  
...  
Keyword(s):  
Survival Rate ◽  
Endangered Species ◽  
Critically Endangered ◽  
High Survival ◽  
Population Recovery ◽  
High Survival Rate ◽  
Critically Endangered Species

scholarly journals Effects of Lead on Ultrastructure of Isoetes sinensis Palmer (Isoetaceae), a Critically Endangered Species in China

PLoS ONE ◽  
2015 ◽  
Vol 10 (9) ◽  
pp. e0139231 ◽  
Author(s):  
Guohua Ding ◽  
Chunye Li ◽  
Xu Han ◽  
Chunyu Chi ◽  
Dawei Zhang ◽  
...  
Keyword(s):  
Endangered Species ◽  
Critically Endangered ◽  
Critically Endangered Species

Genomic characteristics of critically endangered Chimonobambusa hirtinoda C.S. Chao & K.M. Lan

2021 ◽  
Vol 50 (1) ◽  
pp. 69-77
Author(s):  
Tengfei Shen ◽  
Youmiao Zheng ◽  
Zimou Sun ◽  
Meng Xu
Keyword(s):  
Endangered Species ◽  
Frequency Analysis ◽  
Natural Habitat ◽  
Gc Content ◽  
Critically Endangered ◽  
Critically Endangered Species ◽  
Phylogenetic Studies ◽  
Ssr Loci ◽  
Ecological Conservation ◽  
Repeat Rate

With its unique square-shaped culm, Chimonobambusa hirtinoda C.S. Chao & K.M. Lan is a critically endangered species, and its natural habitat is solely restricted to Doupeng Mountain in Guizhou, China. Two small-insert libraries from C. hirtinoda were constructed and sequenced. Approximately 127.83 Gb of highquality reads were generated and assembled into 9,320,997 contigs with a N50 length of 213bp, thereby producing 8,867,344 scaffolds with total length of 2.01 Gb. An estimated genome size of C. hirtinode was 2.86 Gb on the basis of k-mer frequency analysis, with the GC content of 45.40%. The repeat rate and heterozygous ratio were 74.11 and 1.48% in C. hirtinoda genome, respectively. Finally, 65,398 SSR loci were identified in the assembled contigs, including 58.66% tri-nucleotide, 27.42% di-nucleotide, 7.94% tetranucleotide, 3.67% penta-nucleotide, and 2.31% hexa-nucleotide. Results of this study are useful not only for ecological conservation of C. hirtinoda, but also for phylogenetic studies.

Novelties in Begonia (Begoniaceae) from the campos rupestres of Serra do Padre Ângelo, Minas Gerais, Brazil: a new species and a new record

Phytotaxa ◽  
2021 ◽  
Vol 510 (1) ◽  
Author(s):  
LUDOVIC JEAN CHARLES KOLLMANN ◽  
PAULO MINATEL GONELLA
Keyword(s):  
New Species ◽  
High Elevation ◽  
Iucn Red List ◽  
Minas Gerais ◽  
Small Population ◽  
Critically Endangered ◽  
Campos Rupestres ◽  
Rock Outcrops ◽  
Critically Endangered Species ◽  
Minas Gerais State

Begonia piranga (Begoniaceae) is a new narrowly endemic species from the campos rupestres of Serra do Padre Ângelo, a quartzitic massif in Conselheiro Pena, eastern Minas Gerais state, Brazil. Description, diagnosis, taxonomic comments, detailed illustrations, field photographs, and a provisional IUCN Red List Assessment are provided. The new species is considered Critically Endangered due to its restricted occurrence in high elevation rock outcrops, small population size, and decline in the quality of the habitat. Begonia vasconcelosiana, another Critically Endangered species, is also newly reported here for Serra do Padre Ângelo. These discoveries add to the increasing list of novelties from Serra do Padre Ângelo, reinforcing the urge for conservation actions to protect the endemic flora of this Serra and other areas of campos rupestres in eastern Minas Gerais state.

Campanula oreodoxa (Campanulaceae), a new critically endangered species from the Aladagh Mountains, NE Iran

Phytotaxa ◽  
2021 ◽  
Vol 521 (3) ◽  
pp. 193-202
Author(s):  
ALI ASGHAR ARJMANDI ◽  
HAMID EJTEHADI ◽  
FARSHID MEMARIANI ◽  
MOHAMMAD REZA JOHARCHI ◽  
MANSOUR MESDAGHI
Keyword(s):  
New Species ◽  
Pollen Grains ◽  
Critically Endangered ◽  
Conservation Value ◽  
Closely Related Species ◽  
Critically Endangered Species ◽  
Habitat Characterization ◽  
Alpine Species ◽  
Micromorphological Characters ◽  
Ne Iran

Campanula oreodoxa (Campanulaceae) is described and illustrated as a new sub-alpine species from North Khorassan province, Iran. The new species belongs to C. sect. Oreocodon based on dehiscence of the capsules with three middle pores at the base and absence of appendages between the calyx lobes. It is compared morphologically with the closely related species including C. hystricula and C. lourica. The micromorphological characters of seed coat and pollen grains of the new species are presented and compared with the chasmophytic allies in the area. Notes on distribution, habitat characterization, and the associated flora are provided. The new species is assessed as critically endangered (CR) and the conservation value of the habitats in the area is discussed.

Lymania involucrata (Bromeliaceae: Bromelioideae), a new ornamental species from Bahia, Brazil

Phytotaxa ◽  
2021 ◽  
Vol 489 (2) ◽  
pp. 209-215
Author(s):  
EVERTON HILO DE SOUZA ◽  
LIDYANNE Y. S. AONA ◽  
FERNANDA V. D. SOUZA ◽  
ELTON M. C. LEME
Keyword(s):  
New Species ◽  
Endangered Species ◽  
Atlantic Forest ◽  
Critically Endangered ◽  
Critically Endangered Species ◽  
Ornamental Species ◽  
Shape And Size

The authors describe, discuss, and illustrate Lymania involucrata, a new ornamental species from the Atlantic Forest in the municipality of Igrapiúna, Bahia, Brazil, here considered a critically endangered species. The new species is morphologically related to L. brachycaulis but clearly diffe According to Sousa rs from it by the well-developed, involucral primary bracts and the distinct shape and size of inflorescence, primary branches, and flowers. A map of the distribution of the species and taxonomic comments are presented.

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