Species distribution

The Taxus chinensis (Pilg.) Rehder belongs to the Taxaceae family, confer plants, and is a rare and precious species of Vietnam, which was recognized for its use value. Most of them are distributed in the high mountains of Vietnam.

6p viambani 18-06-2024 2 0   Download

In this study, we employ MaxEnt, a widely used species distribution modeling method, to predict climatically suitable habitat for P. nemaeus at present, and then project the optimal model using a range of future climate change scenarios to understand the possible shifts in response to climate change over the entire range of the Red-shanked Douc.

10p viambani 18-06-2024 1 1   Download

In this paper, we colleted occurrence records of the Nguyen’s Fanged Frog from previous studies and our field surveys, and constructed MaxEnt models to generate a distribution map and help advance understanding and conservation measures for this recently discovered frog species.

7p viambani 18-06-2024 2 1   Download

Sarcosperma, which belongs to the Sapotaceae family, is composed of 11 species distributed in Asia, five of which are found in Viet Nam. As a result, in a recent paper, we reported on the isolation of two new compounds, sarcokontums A and B, from the stems and leaves of this plant.

10p viamancio 04-06-2024 1 0   Download

A study on Mollusks’ species composition and distribution on dead coral from Quang Ngai to Cat Ba was conducted during the field survey between Vietnam and Russia on the AKADEMIC OPARIN RC vessel in 2021 at 39 reef stations in 14 study areas. By comparative morphology method, the authors have identified 135 taxa of Mollusca belonging to 48 families, 4 classes on coral reefs. The species composition of Mollusca was slightly different between study areas.

12p dianmotminh02 03-05-2024 2 1   Download

Two small genera of the subfamily Braconinae, Angustibracon Quicke, 1987 and Pseudospinaria Enderlein, 1905, are reported for the first time from Vietnam. Two Angustibracon species, Angustibracon leptogaster Cameron and Angustibracon maculiabdominis Zhou & You and one Pseudospinaria species, Pseudospinaria attenuata (Westwood) are newly recorded for Vietnam’s braconid fauna. Additionally, the species are redescribed and illustrated. An illustrated key to the two known Augustibracon species and a mapped distribution of species in Vietnam are also given.

12p dianmotminh02 03-05-2024 6 1   Download

The taxonomic treatment with a description is provided, along with photographs, distribution, ecology, a conservation assessment, and morphological comparison with its alliance species. It is similar to Zingiber orbiculatum and Zingiber mioga in having whitish flowers and bright yellow anthers but differs in many aspects of vegetative and reproductive characteristics. Moreover, a taxonomic key for all species of sect. Cryptanthium in Vietnam is included.

9p dianmotminh02 03-05-2024 1 1   Download

This study was conducted in the period of 2012 to 2015 in some locations of Japan. At each location, samplings were carried out on reef slopes using SCUBA diving, on reef flats, tidal beaches and river mouths during low tide. The specimens then were treated using a differential interference contrast microscope with a camera lucida (BX-50, OLYMPUS), a quick auto-coater (JFC-1500, Ion Sputtering Device), a scanning electron microscope (SEM) in the laboratory of Shizuoka University.

13p dianmotminh02 03-05-2024 3 1   Download

The result has recorded 29 species of bamboo belonging to 15 genera. The Bambusoideae grow naturally in almost all regions, in an altitudinal range that extends from 200 m up to 2,160 m. Bamboo in the Central Highlands is distributed in three vegetation types: degraded natural forests in valleys and mountain gorges, along rivers (twenty-one species); primary forest, mixed with broadleaved trees (six species); and dry dipterocarp forest (two species).

16p dianmotminh02 03-05-2024 1 1   Download

This paper aims to provide information about the fractions of cadmium (Cd) and its distribution in surface sediment collected from bivalves harvesting areas in Binh Thuan province (Tuy Phong, Phan Thiet, Lagi). For this purpose, the sediment samples were collected monthly along with these areas in 2015–2016. To analyze the fractions of Cd, a five-step Tessier (1979) sequential extraction process was used, including Fraction 1 (Exchangeable), Fraction 2 (Bound to carbonate), Fraction 3 (Bound to iron-manganese oxide), Fraction 4 (Bound to organic compounds), and Fraction 5 (Residual).

10p dianmotminh02 03-05-2024 5 1   Download

Litsea baviensis Lecomte, which belongs to the family Lauraceae. The plant was found in China, Thailand and Vietnam (Ban, 2003; Wu et al., 2008). In Vietnam, this species has been recorded in Lao Cai, Son La, Ha Noi, Ninh Binh, Thanh Hoa, Nghe An, Khanh Hoa provinces (Vietnamese as Bời lời Ba Vì). Notably, in the present study, this plant also was added distribution area in Vietnam (Dak Nong province).

10p dianmotminh02 03-05-2024 4 1   Download

Alpinia vietnamica H.Ð. Tran, Luu & Skornick was identified as a new species in 2019, which is widely distributed in Thua Thien Hue, Quang Nam, and Kon Tum provinces, Vietnam. The current study wishes to report phytochemical investigation, and the biological activities (cytotoxic, antioxidative, and α-glucosidase inhibitory) of isolated compounds.

5p dianmotminh02 03-05-2024 8 1   Download

Aristolochia austroyunnanensis S. M. Hwang (family Aristolochiaceae), a species endemic to southern China, is newly recorded for the flora of Vietnam. This newly recorded species belong to subgenus Siphisia and is most similar to Aristolochia petelotii O. C. Schmidt and Aristolochia fangchi C. Wu ex L. D. Chow & S. M. Hwang. Detailed morphological descriptions and color illustrations, together with information on distribution, habitat, phenology, and taxonomic notes are given. An identification key to all known Siphisia species in Vietnam is also provided.

9p dianmotminh02 03-05-2024 4 1   Download

Flavonoids are a diverse group of natural compounds extensively studied in various research articles. They are widely distributed in the plant kingdom and exhibit various biological activities, including antioxidant, antiinflammatory, anticancer, antiviral, and antimicrobial effects. The genus Knema Lour., which contains many species in Southeast Asia, has been traditionally used to treat various ailments. The current review aims to provide a comprehensive update on the isolation of flavonoids and other secondary metabolites from the genus Knema Lour. between 1978 and 2022.

15p dianmotminh02 03-05-2024 5 2   Download

The Sarcophyton sp., are very strong and dominant in many coral reef areas. Sarcophyton species are characterized by a distinct sterile stalk, a broad, flared, smooth, mushroomshaped top, with a wide distribution and dominance in numerous coral reef areas extending from the Red Sea and eastern Africa to the western Pacific Ocean.

9p dianmotminh02 03-05-2024 5 2   Download

Ebook "North American crop wild relatives (Volume 1: Conservation strategies)" highlights efforts taken by these countries to conserve and use wild resources and provides essential information on best practices for collecting and conserving them. Numerous maps using up-to-date information and methods illustrate the distribution of important species, and supplement detailed description on the potential value these resources have to agriculture, as well as their conservation statuses and needs.

364p tracanhphuonghoa1007 22-04-2024 2 2   Download

The Francois’ Langur (Trachypithecus francoisi) is an endangered primate belonging to subfamily Colobinae. The species was historically widespread in seven northern provinces of Viet Nam. Ba Be National Park is located in Vietnam’s northern mountains, and is a home to several small groups of T. francoisi. The objective of these surveys is to reveal distribution, group size and threats to species and its habitats.

10p vilarry 01-04-2024 3 1   Download

The aim of this study is to investigate the species composition of bird, their distribution as well as threats to the species and its habitat. Line transect and mist net were used to collect data in the field. The results of the study reveal that there are 209 bird species belonging to 51 families, 17 orders in the park.

8p vilarry 01-04-2024 4 1   Download

The species of this family are facing tremendous pressure due to habitat degradation, overexploitation and changing environmental conditions. Therefore, while exploring the floristic diversity of NUPA, attempts were made to explore the orchid diversity, distribution patterns, nativity, endemism, threat categories, and local uses.

6p vilarry 01-04-2024 7 1   Download

Spatial association and species diversity of species-rich tropical forests can be characterized by their spatial patterns. We applied the quantitative analyses based on relationships of spatial distribution of tree species. In a 2-ha plot of a tropical broadleaved forest stand in Kon Ha Nung, Gia Lai province, all tree individuals with DBH ≥ 2.5 cm were mapped and their characteristics (i.e., DBH and species) were recorded.

9p vilarry 01-04-2024 7 0   Download