Threatened status of neglected and underutilised Jatropha (Euphorbiaceae) species endemic to Mexico

Christensen, Cecilie S. L.; Seal, Charlotte E.; Rico-Arce, María de Lourdes

doi:10.22201/ib.20078706e.2019.90.2903

Cited by 3 publications

(3 citation statements)

References 43 publications

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“…However, this list certainly is not an accurate representation of the endangered taxa, and many more species are at risk than indicated by the "Norma Oficial Mexicana NOM-059." For example, a recent assessment of some species belonging to Jatropha subgenus Curcas determined that of the 12 Mexican tree species included, 7 are either threatened or near-threatened, with 2 of them being endangered: Jatropha pereziae and J. stephani (Christensen et al, 2019). Additionally, a study of 37 Mexican cloud forest trees by González-Espinosa et al (2012) determined that in Euphorbiaceae, Phyllanthaceae, and Urticaceae, 15 (41%) of the evaluated species are worthy of some level of conservation concern (1 critically endangered, 4 endangered, 7 vulnerable, and 3 near threatened).…”

Section: Discussionmentioning

confidence: 99%

Tree and tree-like species of Mexico: Euphorbiaceae, Peraceae, Phyllanthaceae, Picrodendraceae, Putranjivaceae, and Urticaceae

Steinmann

Ricker

2020

Rev.Mex.Biodiv.

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Trees or tree-like plants are defined here broadly as perennial, self-supporting plants at least 5 m tall, without considering ascending leaves or inflorescences, and with 1 or several erect stems with a diameter of at least 10 cm. In this fourth contribution of the taxonomic compilation of Mexico's native tree species, 178 species are presented: 134 in the family Euphorbiaceae (53% endemic), 1 in the Peraceae (not endemic), 12 in the Phyllanthaceae (none endemic), 1 in the Picrodendraceae (endemic), 3 in the Putranjivaceae (1 endemic), and 27 in the Urticaceae (7% endemic). The tallest tree species are Tetrorchidium rotundatum (Euphorbiaceae) reaching 45 m, and Hieronyma alchorneoides (Phyllanthaceae) being over 40 m, as reported on herbarium labels or in the literature. All species are listed in an appendix that includes the original publication, references of taxonomic revisions or floristic treatments, in some cases synonyms, existence of subspecies or varieties, maximum height in Mexico, and an indication if the species is endemic to Mexico. Enriquebeltrania (Euphorbiaceae) is the only endemic genus in these families.

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Section: Discussionmentioning

confidence: 99%

Tree and tree-like species of Mexico: Euphorbiaceae, Peraceae, Phyllanthaceae, Picrodendraceae, Putranjivaceae, and Urticaceae

Steinmann

Ricker

2020

Rev.Mex.Biodiv.

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“…(in Blake 1920: 118) Steyermark (1940: 152), following Dehgan 2012, Barragán 2017, and personal observations]. Jatropha gaumeri (Watson 1891: 150) Greenman (1907: 256) has also been registered in a recent publication (Christensen et al 2019), but its presence cannot be corroborated since no specimens could be found in any herbarium consulted. In addition, it is not cited for Veracruz in the monograph of the genus Jatropha in the Neotropics (Dehgan 2012).…”

Section: Introductionmentioning

confidence: 95%

Jatropha chazaroi (Euphorbiaceae), an endangered new species from Apazapan, Veracruz, Mexico

et al. 2023

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Jatropha chazaroi is described and illustrated as a new species from the state of Veracruz, Mexico. It is morphologically similar to J. podagrica but is distinguished by being a tree or shrub devoid of a caudex (vs. shrub with caudex) and lacking persistent and spinescent stipules (vs. having persistent and spinescent stipules). Its flowers possess connate staminate and pistillate calyces and corollas (vs. not connate). Jatropha chazaroi is only known from the municipality of Apazapan, Veracruz, and thrives in shady sites throughout intermittent waterways.

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“…Similar studies to assess plant groups for the IUCN Red List using herbarium data have been done before (Christensen et al, 2019;Rivers et al, 2010), as well as the incorporation of SDM in such analyses (Brummitt et al, 2016;Syfert et al, 2014). However, many studies still focus on smaller groups or geographical areas, where it is possible to produce more in-depth assessments (Romeiras et al, 2016;Williams et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

A method for making Red List assessments with herbarium data and distribution models for species‐rich plant taxa: Lessons from the Neotropical genus Guatteria (Annonaceae)

Verspagen

Erkens

2022

Plants People Planet

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Despite its importance, biodiversity is declining rapidly. To adequately prioritise conservation efforts, we need to know how threatened species actually are. The International Union for the Conservation of Nature (IUCN) Red List is the most widely recognised tool for assessing extinction risk. Unfortunately, many lesser-known species are not yet represented, such as those that are rarely collected or are in speciesrich taxon groups. This is potentially due to low data availability, although Red List assessments can still be made with little data. We present a method to rapidly assess the conservation status of species that have low data availability, which will speed up the inclusion of species from large groups into the IUCN Red List. Summary• The International Union for the Conservation of Nature (IUCN) Red List is the most widely recognised tool to assess the extinction risk of species. For it to be effective in directing conservation effort, it is important that as many species as possible are represented, but many are unfortunately not. A lack of data is often the main reason for this, especially for lesser-studied species. However, this does not mean assessments cannot be made.• We examine the use of georeferenced herbarium data in combination with species distribution modelling for assessing plants on the IUCN Red List, with Guatteria (Annonaceae), a genus of Neotropical trees, as a case study. We focus on differences between preliminary and officially published assessments, show the final conservation status of all Guatteria species and provide a roadmap for compiling Red List assessments for species-rich plant groups in the future.• We found that species-distribution models aid in compiling Red List assessments, especially for taxa that lack data, but expert opinion remains an important source of information. Half of Guatteria species (48.0%) are Least Concern, and 13.1% of species are near threatened or threatened. The remaining species are Data Deficient or Not Evaluated. Most of our preliminary assessments remained unchanged upon review and publication on the IUCN Red List.

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Threatened status of neglected and underutilised Jatropha (Euphorbiaceae) species endemic to Mexico

Abstract: Threatened status of neglected and underutilised Jatropha (Euphorbiaceae) species endemic to Mexico Estado de amenaza para las especies menos conocidas o poco utilizadas de Jatropha (Euphorbiaceae) endémicas de México

Cited by 3 publications

References 43 publications

Tree and tree-like species of Mexico: Euphorbiaceae, Peraceae, Phyllanthaceae, Picrodendraceae, Putranjivaceae, and Urticaceae

Tree and tree-like species of Mexico: Euphorbiaceae, Peraceae, Phyllanthaceae, Picrodendraceae, Putranjivaceae, and Urticaceae

Jatropha chazaroi (Euphorbiaceae), an endangered new species from Apazapan, Veracruz, Mexico

A method for making Red List assessments with herbarium data and distribution models for species‐rich plant taxa: Lessons from the Neotropical genus Guatteria (Annonaceae)

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