scholarly journals Conserving the Critically Endangered tree Vatica cauliflora: population and conservation status assessment

Oryx ◽  
2021 ◽  
pp. 1-3
Author(s):  
Iyan Robiansyah ◽  
Enggal Primananda ◽  
Dipta Sumeru Rinandio ◽  
Jean Linsky
Keyword(s):  
Size Structure ◽  
Conservation Status ◽  
Natural Habitat ◽  
Type Specimen ◽  
Iucn Red List ◽  
Critically Endangered ◽  
Negative Effects ◽  
Endangered Tree ◽  
Status Assessment ◽  
Iucn Red List Criteria

Abstract Vatica cauliflora P.S. Ashton (Dipterocarpaceae) is a threatened tree species endemic to Kapuas Hulu District, West Kalimantan Province, Indonesia. The species is only known from the type specimen collected in 1953. After this first collection, there was no record confirming the presence of this tree in its natural habitat. Our recent surveys in 2019 and 2020 located 179 individuals of the species in six unprotected locations. The population's size structure is dominated (62.6%) by young individuals within the 0–5 cm diameter class. Our surveys also showed that the habitat of V. cauliflora is degraded as a result of the negative effects of agriculture and logging. Assessment with the IUCN Red List criteria indicates that V. cauliflora should be categorized as Critically Endangered.

scholarly journals Conservation status assessment of the amphibians and reptiles of Uruguay

2010 ◽  
Vol 100 (1) ◽  
pp. 05-12 ◽  
Author(s):  
Andrés Canavero ◽  
Santiago Carreira ◽  
José A. Langone ◽  
Federico Achaval ◽  
Claudio Borteiro ◽  
...  
Keyword(s):  
Native Species ◽  
Conservation Status ◽  
Iucn Red List ◽  
Critically Endangered ◽  
Amphibian Species ◽  
Status Assessment ◽  
Data Deficient ◽  
Iucn Red List Criteria ◽  
Definition Of ◽  
Near Threatened

The native species of amphibians and reptiles of Uruguay were categorized according to the IUCN Red List criteria. Out of 47 amphibian species, seven are listed as Critically Endangered (CR), five as Endangered (EN), one as Vulnerable (VU), three as Near Threatened (NT), and two as Data Deficient (DD); the remaining species are considered to be Least Concern (LC). Among the 64 species of reptiles evaluated, one is listed as Critically Endangered (CR), seven as Endangered (EN), two as Vulnerable (VU), one as Near Threatened (NT) and seven as Data Deficient (DD); the rest are considered to be Least Concern (LC). The use of these results as an additional criterion in the definition of protected areas in Uruguay will contribute towards the conservation of the aforementioned threatened species and their associated ecosystems.

scholarly journals Distribution and conservation status of Magnolia ovoidea (Magnoliaceae): a Critically Endangered species in Yunnan, China

Oryx ◽  
2019 ◽  
Vol 54 (4) ◽  
pp. 466-469
Author(s):  
Chunyan Han ◽  
Lidan Tao ◽  
Weibang Sun
Keyword(s):  
Size Structure ◽  
Extinction Risk ◽  
Conservation Status ◽  
Iucn Red List ◽  
Critically Endangered ◽  
Endangered Tree ◽  
Critically Endangered Species ◽  
Breast Height ◽  
South West ◽  
Fragmented Distribution

AbstractMagnolia ovoidea is a narrowly endemic, Critically Endangered tree with a fragmented distribution in south-west Yunnan, China. We examined the size structure of this species, documented threats and assessed its extinction risk. We found the species in six locations, all in unprotected areas, in Maguan County. The largest subpopulations are in Donggua Lin and Youfang Po, with 17 and 50 living individuals, respectively. The distribution of the diameter at breast height of the M. ovoidea population has an inverse J-shape, indicating a stable size structure. However, the distribution of the height of seedlings is L-shaped, suggesting inhibited regeneration. The natural vegetation is severely fragmented in all six locations, surrounded by roads, farmlands, and Alnus nepalensis or Cunninghamia lanceolata plantations. We recommend that M. ovoidea should be categorized on the IUCN Red List as Critically Endangered based on criteria B2ab(iii) + C2a(i).

scholarly journals Conservation status of Mascarene Amaranth Aerva congesta Balf.F. Ex Baker (Eudicots: Caryophyllales: Amaranthaceae): a Critically Endangered endemic herb of the Mascarenes, Indian Ocean

2018 ◽  
Vol 10 (8) ◽  
pp. 12056
Author(s):  
Kersley Bruno Pynee ◽  
David Harold Lorence ◽  
Poojanraj Khurun
Keyword(s):  
Conservation Status ◽  
Iucn Red List ◽  
Small Population ◽  
Red List ◽  
Critically Endangered ◽  
Native Vegetation ◽  
Ecological Studies ◽  
Area Of Occupancy ◽  
Mascarene Islands ◽  
Iucn Red List Criteria

Aerva congesta Balf.f. ex Baker (Amaranthaceae), an endemic of Mascarene Islands (Mauritius and Rodrigues) is assessed for its conservation status. Considering its local extinction in Rodrigues and very small population in Mauritius, in Round Island and at Gris Gris, south of Mauritius its area of occupancy (AOO) is estimated at 8km².  Due to its small AOO and threats by increasing native vegetation and alien species, A. congesta is evaluated as Critically Endangered following the latest IUCN Red List criteria.  The species needs an urgent well-defined restoration program and ecological studies to prevent its extinction.  

Begonia sibthorpioides subsp. machinchangensis (Begoniaceae): a new subspecies from Gunung Machinchang, Langkawi Island, Malaysia

Phytotaxa ◽  
2020 ◽  
Vol 459 (2) ◽  
pp. 168-180
Author(s):  
J.P.C. TAN ◽  
S.F. FATHMATH ◽  
S.M. TAM
Keyword(s):  
Conservation Status ◽  
Iucn Red List ◽  
Infrastructure Development ◽  
Morphological Comparison ◽  
New Subspecies ◽  
Bayesian Phylogenetic Analysis ◽  
Status Assessment ◽  
Iucn Red List Criteria ◽  
New Infrastructure ◽  
Single Locality

Begonia sibthorpioides subsp. machinchangensis is a newly described taxon restricted to Gunung Machinchang, Langkawi Island, Malaysia. Based on recent collections of this new subspecies and B. sibthorpioides from its type locality of Gunung Jerai, Kedah, detailed morphological comparison has revealed distinguishing characters between these two sandstone-restricted taxa such as indumentum, stipules, bracts, scale-like hairs on tubers, leaf thickness and impressed venation. Descriptions and illustrations for the new subspecies and the type subspecies are provided, and they are also compared to other species, i.e. B. hymenophylla, B. sinuata and B. thaipingensis. Genetic distance based on analysis of chloroplast ndhF-rpl32 sequences supports the delimitation of B. sibthorpioides into two subspecies, and Bayesian phylogenetic analysis showed monophyly of these three species where B. sinuata and B. thaipingensis formed a clade which is sister to B. sibthorpioides. Provisional conservation status assessment using IUCN Red List Criteria indicates B. sibthorpioides subsp. machinchangensis is Critically Endangered (CR) due to its restriction to particular microhabitat of single locality and the population being threatened by new infrastructure development for tourism.

scholarly journals A tree species with an extremely small population: recategorizing the Critically Endangered Acer yangbiense

Oryx ◽  
2020 ◽  
Vol 54 (4) ◽  
pp. 474-477 ◽  
Author(s):  
Lidan Tao ◽  
Chunyan Han ◽  
Kun Song ◽  
Weibang Sun
Keyword(s):  
Tree Species ◽  
Size Structure ◽  
Iucn Red List ◽  
Small Population ◽  
Critically Endangered ◽  
Private Forest ◽  
Negative Effects ◽  
Wood Harvesting ◽  
Iucn Red List Categories ◽  
J Curve

AbstractAcer yangbiense Y.S. Chen & Q.E. Yang (Aceraceae) is a threatened tree species endemic to China, formerly presumed to have declined to only five extant individuals, restricted to Yangbi County, Yunnan Province. Our surveys in 2016, however, located 577 individuals in 12 localities, but only three localities (with a total of 62 individuals) are protected. Nine localities are on private forest land. The population's size structure is an inverse J-curve, but there is a scarcity of trees of the smallest size class and of seedlings. Our surveys also showed that the habitat of A. yangbiense is degraded as a result of the negative effects of agriculture, logging and wood harvesting. Assessment with the IUCN Red List categories and criteria indicates that A. yangbiense should be recategorized from Critically Endangered to Endangered.

scholarly journals Assessment of the rarity and conservation status of the Colombian endemic brown hairy dwarf porcupine Coendou vestitus

Oryx ◽  
2020 ◽  
pp. 1-6
Author(s):  
María M. Torres-Martínez ◽  
Héctor E. Ramírez-Chaves ◽  
Elkin A. Noguera-Urbano ◽  
Fernando C. Passos
Keyword(s):  
Small Body ◽  
Conservation Status ◽  
Natural Habitat ◽  
Habitat Type ◽  
Iucn Red List ◽  
Red List ◽  
Small Range ◽  
Minimum Convex Polygon ◽  
Area Of Occupancy ◽  
Species Rarity

Abstract The brown hairy dwarf porcupine Coendou vestitus is a poorly studied Andean species endemic to Colombia. Its current Red List category is contradictory: globally it is categorized as Data Deficient but in Colombia it is categorized as Vulnerable. This contradiction has limited the implementation of conservation programmes. We evaluate the level of rarity of the species and provide consolidated information for a new assessment of its Red List status. We reviewed literature, photographs, and voucher specimens in natural history collections. Using the confirmed records, we estimated the extent of occurrence (EOO) based on the minimum convex polygon and the area of occupancy (AOO) summing the area of grid squares occupied by the species. We found that C. vestitus is very rare, with a small range, low estimated population density, occurrence in only one habitat type and small body size. The species has an EOO of 3,323 km2 and an AOO of 24 km2, based on six confirmed localities, all on the western slopes of the Eastern Cordillera, in the central Andean region of Colombia. Based on the species' rarity, restricted distribution, and threats to its natural habitat, we recommend its categorization as Endangered on the IUCN Red List. This will help delineate research and conservation efforts for this porcupine, which has a highly restricted range and inhabits the threatened Andean forest.

A refined circumscription of Notobubon striatum and the resurrection of Dregea collina Ecklon & Zeyher (Apiaceae, Apioideae)

Phytotaxa ◽  
2016 ◽  
Vol 266 (1) ◽  
pp. 27 ◽  
Author(s):  
ANTHONY R. MAGEE ◽  
ODETTE E. CURTIS ◽  
B-E. VAN WYK
Keyword(s):  
Conservation Status ◽  
Leaf Size ◽  
Type Specimen ◽  
Distinct Species ◽  
Critically Endangered ◽  
Type Material ◽  
New Combination ◽  
Careful Examination ◽  
Field Surveys ◽  
Extensive Field

Extensive field surveys of the Critically Endangered Central and Eastern Rûens Shale Renosterveld have uncovered that Notobubon striatum, as currently circumscribed, comprises two distinct species. Upon careful examination of the type material it has become clear that names exist for both species. The type specimen of N. striatum clearly matches the lesser known species, a large shrub, ca. 1 m. tall, with a powerful anise-scent and which is restricted to the banks of seasonal rivers and watercourses in the Central and Eastern Rûens Shale Renosterveld. The second and better known entity, with a wider distribution, corresponds to the type material of Dregea collina Ecklon & Zeyher. As such, a new combination, Notobubon collinum (Ecklon & Zeyher) Magee, is here made to accommodate this taxon, restricted to dry quartz and silcrete patches or outcrops in Eastern Rûens Shale Renosterveld. In their revised circumscriptions N. striatum and N. collinum are readily distinguished by habit, scent, leaf size and division, as well as leaf lobe shape and sepal size. Comprehensive descriptions of both species are provided, together with notes on their ecology and conservation status, and the existing key to the species of Notobubon updated. This brings the number of recognised species in the genus to thirteen.

scholarly journals Habitat associations and conservation status of an endemic forest dwarf chameleon (Bradypodion sp.) from South Africa

Oryx ◽  
2006 ◽  
Vol 40 (2) ◽  
pp. 183-188 ◽  
Author(s):  
Walter J. Reisinger ◽  
Devi M. Stuart-Fox ◽  
Barend F.N. Erasmus
Keyword(s):  
South Africa ◽  
Conservation Status ◽  
Canopy Cover ◽  
Iucn Red List ◽  
Habitat Associations ◽  
Suitable Habitat ◽  
Area Of Occupancy ◽  
Forest Interior ◽  
Forest Remnants ◽  
Iucn Red List Criteria

We quantified habitat associations and evaluated the conservation status of a recently identified, undescribed species of dwarf chameleon, Bradypodion sp. nov. Dhlinza, endemic to scarp forest remnants in KwaZulu-Natal Province, South Africa. At the microhabitat scale the Dhlinza dwarf chameleon was found more often in forest gaps and near paths than highly disturbed edges or forest interior. Chameleon presence was not explained by forest physiognomic variables such as vine cover, shrub and tree density, or canopy cover. Presence near gaps may be better explained by the combined effects of the thermal microenvironment and food availability. The species is moderately common where it occurs, with estimated densities of 4.7, 8.7 and 29.7 individuals per ha within forest interior, edges and gaps respectively. At the landscape scale, the chameleon occurs only in three remnant forests: the Dhlinza, Entumeni and Ongoye Forests. The species' extent of occurrence was estimated to be 88 km2 and its area of occupancy 49 km2. Based on the small area of remaining suitable habitat, this species meets the requirements for categorization as Endangered according to IUCN Red List criteria.

scholarly journals Global and Regional IUCN Red List Assessments: 6

2018 ◽  
Vol 6 ◽  
pp. 31-44 ◽  
Author(s):  
Giuseppe Fenu ◽  
Mohamed Abdelaal ◽  
Gianluigi Bacchetta ◽  
Luciano Bongiorni ◽  
Annalena Cogoni ◽  
...  
Keyword(s):  
Vascular Plants ◽  
Conservation Status ◽  
Iucn Red List ◽  
Red List ◽  
Global Level ◽  
Regional Assessment ◽  
Iucn Categories ◽  
Status Assessment

In this contribution, the conservation status assessment of four vascular plants according to IUCN categories and criteria are presented. It includes the assessment ofEpipactismaricae(Croce, Bongiorni, De Vivo & Fori) Presser & S.Hertel at global level, and the regional assessment ofCerintheretortaSm. (Italy), PlatantherakuenkeleiH.Baumannsubsp.kuenkelei (Europe) andTyphaelephantinaRoxb. (Egypt).

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