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.

scholarly journals Increasing accuracy: The advantage of using open access species occurrence database in the Red List assessment

2020 ◽  
Vol 21 (8) ◽  
Author(s):  
Iyan Robiansyah ◽  
Wita Wardani
Keyword(s):  
Open Access ◽  
Extinction Risk ◽  
Conservation Status ◽  
Iucn Red List ◽  
Red List ◽  
Suitable Habitat ◽  
Herbarium Specimens ◽  
Species Occurrence ◽  
Extent Of Occurrence ◽  
Area Of Occupancy

Abstract. Robiansyah I, Wardani W. 2020. Increasing accuracy: The advantage of using open access species occurrence database in the Red List assessment. Biodiversitas 21: 3658-3664. IUCN Red List is the most widely used instrument to assess and advise the extinction risk of a species. One of the criteria used in IUCN Red List is geographical range of the species assessed (criterion B) in the form of extent of occurrence (EOO) and/or area of occupancy (AOO). While this criterion is presumed to be the easiest to be completed as it is based mainly on species occurrence data, there are some assessments that failed to maximize freely available databases. Here, we reassessed the conservation status of Cibotium arachnoideum, a tree fern distributed in Sumatra and Borneo. This species was previously assessed by Praptosuwiryo (2020, Biodiversitas 21 (4): 1379-1384) which classified the species as Endangered (EN) under criteria B2ab(i,ii,iii); C2a(ii). Using additional data from herbarium specimens recorded in the Global Biodiversity Information Facility (GBIF) website and from peer-reviewed scientific papers, in the present paper we show that C. arachnoideum has a larger extent of occurrence (EOO) and area of occupancy (AOO), more locations and different conservation status compared to those in Praptosuwiryo (2020). Our results are supported by the predicted suitable habitat map of C. arachnoideum produced by MaxEnt modelling method. Based on our assessment, we propose the category of Vulnerable (VU) C2a(i) as the global conservation status for C. arachnoideum. Our study implies the advantage of using open access databases to increase the accuracy of extinction risk assessment under the IUCN Red List criteria in regions like Indonesia, where adequate taxonomical information is not always readily available.

scholarly journals The jaguar's spots are darker than they appear: assessing the global conservation status of the jaguar Panthera onca

Oryx ◽  
2017 ◽  
Vol 52 (2) ◽  
pp. 300-315 ◽  
Author(s):  
J. Antonio de la Torre ◽  
José F. González-Maya ◽  
Heliot Zarza ◽  
Gerardo Ceballos ◽  
Rodrigo A. Medellín
Keyword(s):  
Human Population ◽  
Conservation Status ◽  
Conservation Policy ◽  
Iucn Red List ◽  
Red List ◽  
Panthera Onca ◽  
Policy And Practice ◽  
Area Of Occupancy ◽  
Global Status ◽  
Iucn Red List Criteria

AbstractThe IUCN Red List is widely used to guide conservation policy and practice. However, in most cases the evaluation of a species using IUCN Red List criteria takes into account only the global status of the species. Although subpopulations may be assessed using the IUCN categories and criteria, this rarely occurs, either because it is difficult to identify subpopulations or because of the effort involved. Using the jaguar Panthera onca as a model we illustrate that wide-ranging species that are assigned a particular category of threat based on the IUCN Red List criteria may display considerable heterogeneity within individual taxa in terms of the level of risk they face. Using the information available on the conservation status of the species, we evaluated the jaguar's current geographical range and its subpopulations. We identified the most threatened subpopulations, using the extent of occurrence, area of occupancy, population size and the level of threat to each subpopulation. The main outcome of this analysis was that although a large subpopulation persists in Amazonia, virtually all others are threatened because of their small size, isolation, deficient protection and the high human population density. Based on this approach, future conservation efforts can be prioritized for the most threatened subpopulations. Based on our findings we recommend that for future Red List assessments assessors consider the value of undertaking assessments at the subpopulation level. For the jaguar, sub-global assessments should be included on the Red List as a matter of urgency.

scholarly journals Distribution and status of the Critically Endangered blond titi monkey Callicebus barbarabrownae of north-east Brazil

Oryx ◽  
2011 ◽  
Vol 45 (3) ◽  
pp. 439-443 ◽  
Author(s):  
Rodrigo C. Printes ◽  
Anthony B. Rylands ◽  
Júlio César Bicca-Marques
Keyword(s):  
Conservation Status ◽  
Iucn Red List ◽  
Red List ◽  
Critically Endangered ◽  
Forest Fragments ◽  
Vegetation Types ◽  
North East ◽  
Area Of Occupancy ◽  
Titi Monkey ◽  
Iucn Red List Assessment

AbstractThe blond titi monkey Callicebus barbarabrownae lives in forest fragments in the caatinga (tropical thorn scrub and forest) of north-east Brazil. In 2004–2005 we carried out five surveys to determine its current distribution and conservation status; surveying forest fragments, interviewing local people, and recording vegetation types and patterns of land use. The blond titi monkey occurs mainly in Dense Arboreal Caatinga and Highland Coastal Rainforest in the state of Bahia, at elevations of 241–908 m. Its range extends over 291,438 km2, with an area of occupancy of 2,636 km2. Estimated minimum population was 260 individuals. It was not recorded in any protected area. Cattle ranching favours the persistence of forest fragments for this species, whereas agriculture, subsistence or commercial, does not. Our findings supported the IUCN Red List assessment of Critically Endangered for this species.

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.  

scholarly journals PRELIMINARY EVALUATION OF THE STATUS OF ALOE DHUFARENSIS LAVRANOS (ASPHODELACEAE JUSS.) IN THE ARABIAN PENINSULA

2021 ◽  
Vol 2 (1) ◽  
pp. 14-21
Author(s):  
Abdul Wali Al-Khulaidi
Keyword(s):  
Plant Species ◽  
Conservation Planning ◽  
Arabian Peninsula ◽  
Conservation Status ◽  
Iucn Red List ◽  
Red List ◽  
Preliminary Evaluation ◽  
Endemic Plants ◽  
Area Of Occupancy ◽  
The Status

Assessment of plant species in particular rare and endemic is essential for monitoring and conservation planning. I aimed to support conservation activities by addressing knowledge of the status of Aloe dhufarensis Lavranos, one of the endemic plants in the Arabian Peninsula. Information on the status and distribution range of A. dhufarensis in the Arabian Peninsula is almost absent. To Assess A. dhufarensis according to IUCN categories, Extent of Occurrence (EOO) and Area of Occupancy (AOO) were created and measured using ArcMap 10.8. The species is described and illustrated; the distribution of the species was mapped. The evaluation and the conservation status of this plant species are reported according to the context of IUCN Red List guidelines and criteria.

scholarly journals Conservation status and recovery of Podocarpus angustifolius: a threatened tree of Cuba

Oryx ◽  
2021 ◽  
pp. 1-3
Author(s):  
Ernesto Testé ◽  
Majela Hernández ◽  
Eldis R. Bécquer ◽  
Oliver Valle ◽  
Luis R. González-Torres
Keyword(s):  
Protected Areas ◽  
Size Structure ◽  
Conservation Status ◽  
Population Based ◽  
Iucn Red List ◽  
Small Population ◽  
Red List ◽  
Coffee Plantations ◽  
Area Of Occupancy ◽  
In The Wild

Abstract The recovery of species’ populations is one of the most challenging tasks in conservation, which is why species recovery is most likely to be successful if it involves as many stakeholders as possible. Podocarpus angustifolius, a tree endemic to Cuba, is potentially threatened by overexploitation, deforestation and expansion of exotic species. In December of 2017, in two protected areas containing the only known subpopulations of this species, we recorded the geographical position, height, and diameter at breast height of each individual, and calculated the extent of occurrence (EOO) and area of occupancy (AOO). We recorded a total of 575 individuals, 174 of which were adult (defined as ≥ 6 m height on the basis of the occurrence of reproductive structures), and most of which occurred in Lomas de Banao Ecological Reserve. The EOO and AOO were 125.8 km2 and 6.0 km2, respectively. All P. angustifolius that remain in the wild are within two protected areas, either in rainforest relicts or in coffee plantations. The size structure indicates a growing population. Based on our findings we recommend that P. angustifolius should be recategorized from Vulnerable (on the IUCN Red List) and Critically Endangered (on the national Red List) to Endangered, based on criterion D (small population size). We recommend the continued reinforcement of the population at Topes de Collantes Natural Protected Landscape and the continued engagement of local stakeholders for the long-term conservation of this species.

Conservation status of New Caledonia palms

1999 ◽  
Vol 5 (1) ◽  
pp. 9 ◽  
Author(s):  
J.-C. Pintaud ◽  
T. Jaffré ◽  
J.-M. Veillon
Keyword(s):  
Threatened Species ◽  
New Caledonia ◽  
Conservation Status ◽  
Iucn Red List ◽  
Red List ◽  
Iucn Red List Categories ◽  
Area Of Occupancy ◽  
Palm Species ◽  
Red List Categories ◽  
Herbarium Collections

An assessment of the conservation status of the palm species occuring in New Caledonia is provided, based on the new IUCN Red List categories. To determine the conservation status of each species, their extent of occurrence was determined using locality data on herbarium collections. Area of occupancy, number of adults, regeneration, and threats were evaluated on 62 localities throughout the Territory, including all types of palm habitats and all localities of species occurring at less than five sites. Among the 37 palm species known in New Caledonia, all are endemic and 13 are in a threatened category, including four critically endangered, one endangered, and eight vulnerable. Only four of the threatened species are represented in a reserve. Six species are listed as LRcd since they are adequately protected in a reserve despite an acute restriction of their range. Recommendations are given to improve the network of protected areas to include more threatened species.

scholarly journals Assessing the conservation status of tree fern Cibotium arachnoideum (C. Chr.) Holttum

2020 ◽  
Vol 21 (4) ◽  
Author(s):  
Titien Ngatinem Praptosuwiryo
Keyword(s):  
Endangered Species ◽  
Rare Species ◽  
Conservation Status ◽  
Field Studies ◽  
Iucn Red List ◽  
Red List ◽  
Tree Fern ◽  
The West ◽  
Area Of Occupancy ◽  
North Sumatra

Abstract. Praptosuwiryo TN. 2020. Assessing the conservation status of tree fern Cibotium arachnoideum (C.Chr.) Holttum. Biodiversitas 21: 1379-1384. Cibotium arachnoideum (C.Chr.) Holttum (Cibotiaceae), is a large terrestrial fern with an upright or prostrate rhizome having densely shining reddish-brown of rigid hairs and one or two pairs of sori with two indusia forming a small cup on each lamina-segment. This tree fern is a rare species and strictly distributed in the Malesian region. The study aims to assess the conservation status of C. arachnoideum by using the 2012 IUCN Red List Catagories and Criteria (version 3.1.). Population size was estimated and observed both based on specimens deposited at the Herbarium Bogoriense (BO) and field studies in Sumatra. The area of occupancy (AOO) of this species is 44 km2. Cibotium arachnoideum is occurred in severely fragmented locations in the West Malesian region, in 2 locations, viz. Sumatra and Borneo. Sumatra has only two subpopulations, and Borneo has nine subpopulations. The number of mature individuals was only found 372 in one location of North Sumatra and 19 individuals in one location of Bengkulu. Therefore, C. arachnoideum is proposed as an endangered species, En: B2ab (i,ii,iii) + C2a (ii).

Flora of nature reserve “Papaya-Kaya” on the South-East of the Crimea

2019 ◽  
pp. 81-105
Author(s):  
E. S. Krainyuk ◽  
L. E. Ryff
Keyword(s):  
Nature Reserve ◽  
Conservation Status ◽  
Habitat Type ◽  
Systematic Position ◽  
Iucn Red List ◽  
Red List ◽  
Annotated List ◽  
The Crimea ◽  
Bern Convention ◽  
The Russian Federation

The annotated list of the flora of the Papaya-Kaya Nature Reserve is given, which includes 450 species and subspecies of higher vascular plants from 264 genera of 66 families. The data on the systematic position, geographic range, life form, habitat type according to EUNIS and the sozological status of the species are provided. On the protected area 69 species with conservation status of different levels have been registered. One of them is included in the IUCN Red List as vulnerable, 15 - in the Red Book of the Russian Federation, 36 - in the Red Book of the Crimea, 9 species - in the CITES, 5 species in the documents of the Bern Convention, 3 species - in Appendix 1 of the European Red List, 54 species - in Appendix 2 of the European Red List, 9 Crimean endemic species were also noted.

Conservation status of the threatened and endemic Rufous-throated Dipper Cinclus schulzi in Argentina

2019 ◽  
Vol 30 (3) ◽  
pp. 396-405
Author(s):  
NATALIA POLITI ◽  
SEBASTIÁN MARTINUZZI ◽  
PATRICIA SARDINA ARAGÓN ◽  
VERÓNICA MIRANDA ◽  
SEBASTIÁN ALBANESI ◽  
...  
Keyword(s):  
Population Size ◽  
National Parks ◽  
Potential Distribution ◽  
Conservation Status ◽  
Iucn Red List ◽  
Red List ◽  
Mountain Forest ◽  
Suitable Habitat ◽  
Area Of Occupancy ◽  
North Western

SummaryThe Rufous-throated Dipper Cinclus schulzi is endemic to the Southern Yungas of north-western Argentina and southern Bolivia. The species is categorised as ‘Vulnerable’ on the IUCN Red List on the basis of small population size and restricted range. The purpose of our study was to determine the distribution of potentially suitable habitat for the Rufous-throated Dipper, estimate its population size, and assess potential distribution within strict protected areas, in north-western Argentina. We surveyed 44 rivers in the Southern Yungas of Argentina from 2010 to 2013 to determine dipper density (i.e. the number of individuals detected per km surveyed). The dipper’s potential distribution was assessed using a maximum entropy modeling approach based on 31 occurrence points and eight bioclimatic and two topographic variables as predictors. The species is dependent on mountain forest rivers, so the potential distribution was restricted to rivers. We estimated dipper population size by multiplying density by the potential distribution along rivers. Finally, we calculated the extent of suitable habitat contained within the boundaries of Argentina´s National Parks. Dipper density was 0.94 ± 1.55 individuals/km. We estimate that within north-west Argentina there are ~2,815 km of river that are potential habitat, with an area of occupancy of 141 km2 and a population size of 2,657 ± 4,355 dippers. However, of this river extent, less than 5% is within National Parks. Our results highlight the need to create new and to enlarge existing National Parks that protect the potentially suitable habitat of the species. Although more information is needed for Bolivia, the country-level area of occupancy and population size of the dipper found in Argentina provides strong evidence that the IUCN Red List classification of this species as ‘Vulnerable’ is warranted.

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