Botanical Sciences最新文献_第5页

Stelis breviloba (Orchidaceae, Pleurothallidinae), a new species from Mexico 短叶Stelis brevloba（兰科，Pleurothalidinae），墨西哥一新种

IF 1.4 4区生物学

Botanical Sciences Pub Date : 2023-06-30 DOI: 10.17129/botsci.3307

R. Solano, G. Salazar

{"title":"Stelis breviloba (Orchidaceae, Pleurothallidinae), a new species from Mexico","authors":"R. Solano, G. Salazar","doi":"10.17129/botsci.3307","DOIUrl":"https://doi.org/10.17129/botsci.3307","url":null,"abstract":"Background: Stelis subgen. Physosiphon is basically a Meso-American group, and its best-known species is Stelis emarginata, characterized by its reddish orange flowers and distribution along the Gulf of Mexico slope in Mexico and Guatemala. Morphologically similar specimens from the Sierra Madre del Sur, on the Pacific slope of Guerrero and Oaxaca could represent a different and undescribed taxon. \u0000Question: Are the Sierra Madre del Sur populations similar to Stelis emarginata a different species? \u0000Study site: Sierra Madre del Sur in Guerrero and Oaxaca, Mexico. \u0000Methods: The description of the new species was based on live and pressed specimens; a line drawing and photographs were made from fresh material; its known localities were georeferenced and displayed on a map of Mexico. A morphological comparison of the new taxon with similar species was done based on specialized literature. \u0000Results: Stelis breviloba is described and illustrated as a new species from southern Guerrero and Oaxaca. It differs from S. emarginata by its shorter plants, less floriferous racemes, smaller flowers, oblong petals, and its allopatric distribution, restricted to the Pacific slope of the Sierra Madre del Sur. A key for the identification of the Mesoamerican species of Stelis subgen. Physosiphon is provided. \u0000Conclusion: Stelis breviloba is an endemic of the Sierra Madre del Sur and probable vicariant species of S. emarginata. Most species of Stelis subgen. Physosiphon (six out of eight) are present in the Mexican flora.","PeriodicalId":54375,"journal":{"name":"Botanical Sciences","volume":" ","pages":""},"PeriodicalIF":1.4,"publicationDate":"2023-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45124424","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Environmental factors can influence spatial aggregation and acorn production in the endemic and endangered oak Quercus brandegeei in Mexico 环境因素会影响墨西哥特有和濒危橡树布兰德盖栎的空间聚集和橡子生产

IF 1.4 4区生物学

Botanical Sciences Pub Date : 2023-06-07 DOI: 10.17129/botsci.3309

Carolyn Brinckwirth, C. Klimas, Camila Cortez, Janet Nuῆez, Daniel W. Pérez-Morales, A. Breceda, A. González‐Rodríguez, S. Álvarez-Clare

{"title":"Environmental factors can influence spatial aggregation and acorn production in the endemic and endangered oak Quercus brandegeei in Mexico","authors":"Carolyn Brinckwirth, C. Klimas, Camila Cortez, Janet Nuῆez, Daniel W. Pérez-Morales, A. Breceda, A. González‐Rodríguez, S. Álvarez-Clare","doi":"10.17129/botsci.3309","DOIUrl":"https://doi.org/10.17129/botsci.3309","url":null,"abstract":"Background and study species: The endangered oak Quercus brandegeei Goldman, endemic to Baja California Sur, Mexico, is threatened because of its relictual distribution restricted to ephemeral riverbeds, declining populations, and a lack of seedling regeneration. Although there is evidence of viable acorn production, no seedlings or saplings have been found across the range of occurrence for this species. \u0000Hypothesis: We tested for spatial aggregation and factors determining acorn production, hypothesizing that Q. brandegeei trees would be less distant from one another in regions with higher precipitation and that tree attributes and climatic variables would co-determine acorn presence. \u0000Study site and dates: Baja California Sur, Mexico, 2016-2017 \u0000Methods: We conducted a Ripley’s K analysis to determine each population’s spatial pattern (random, uniform, clumped) across 12 populations and a total of 194 individuals. To find the impact of environmental factors on acorn production we conducted a series of generalized linear models on eight climatic variables. \u0000Results: Ripley’s K analysis revealed that Q. brandegeei is a highly clumped species, with the highest rate of aggregation occurring within 0-25 meters. Region but not climatic cues were found to be important determinants of presence of acorns. \u0000Conclusions: High aggregation in clumps and low evidence of acorn production in some populations suggests that there is a niche attrition for this species, which is confined to very specific microsites along ephemeral riverbeds. Suitable recruitment areas could be reduced even further under the hotter and drier climate predicted for the region.","PeriodicalId":54375,"journal":{"name":"Botanical Sciences","volume":" ","pages":""},"PeriodicalIF":1.4,"publicationDate":"2023-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43194235","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Cultivo in vitro de Agave potatorum, especie amenazada endémica de México 墨西哥特有濒危物种龙舌兰马铃薯的离体培养

IF 1.4 4区生物学

Botanical Sciences Pub Date : 2023-06-06 DOI: 10.17129/botsci.3279

Ana Gabriela Téllez Torres, José Ángel Jiménez Rodríguez, Octavio González Caballero, Wendy Rocio Juárez Pérez, Samuel Martínez Martínez, Víctor Manuel Chávez Ávila

{"title":"Cultivo in vitro de Agave potatorum, especie amenazada endémica de México","authors":"Ana Gabriela Téllez Torres, José Ángel Jiménez Rodríguez, Octavio González Caballero, Wendy Rocio Juárez Pérez, Samuel Martínez Martínez, Víctor Manuel Chávez Ávila","doi":"10.17129/botsci.3279","DOIUrl":"https://doi.org/10.17129/botsci.3279","url":null,"abstract":"Antecedentes: Agave potatorum es una especie endémica importante ecológica, cultural y económicamente. Poco se cultiva y sus poblaciones naturales están desapareciendo, por lo que una alternativa es la propagación por cultivo de tejidos vegetales. \u0000Preguntas: ¿Es posible regenerar nuevos individuos partiendo de estructuras somáticas? ¿Qué explante regenera más plántulas? ¿Qué combinación de reguladores del crecimiento vegetal estimula una mayor formación de brotes? \u0000Especie estudiada: Agave potatorum, semillas de Oaxaca, México. \u0000Lugar de estudio y fechas: Jardín Botánico, Instituto de Biología, UNAM, Ciudad de México, México. Desde 2020. \u0000Métodos: Semillas se desinfectaron y germinaron in vitro y ex vitro. Se cultivaron in vitro explantes de cotiledones, tallos y hojas en medio MS modificado, un mes con BAP (0-2 mg/L) combinado con 2,4-D (0-0.5 mg/L), posteriormente en MS sin reguladores del crecimiento vegetal. Las plantas obtenidas con tres o más raíces se sometieron a un proceso de aclimatización. \u0000Resultados: A dos meses de iniciados los cultivos las semillas germinaron in vitro (56.04 %) y ex vitro (31.87 %). Después de 10 meses del período de inducción, se obtuvieron 228 brotes y plántulas, 206 procedían de los tratamientos BAP 1.5-2 mg/L con 2,4-D 0.5 mg/L, con 8.1-12.5 brotes/explante de tallo y hoja. Más del 70 % de las plantas sobrevivieron en invernadero luego de dos meses. \u0000Conclusiones: Esta investigación puede contribuir a la conservación de la especie, enfrentar los efectos del cambio climático, la conservación de servicios ecosistémicos y potenciar la economía mediante un aprovechamiento sustentable de ésta y otras especies amenazadas.","PeriodicalId":54375,"journal":{"name":"Botanical Sciences","volume":"1 1","pages":""},"PeriodicalIF":1.4,"publicationDate":"2023-06-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67443324","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Landscape heterogeneity drives spatial distribution of palm community in a Neotropical rainforest reserve affected by defaunation 景观异质性驱动退化影响下新热带雨林保护区棕榈群落的空间分布

IF 1.4 4区生物学

Botanical Sciences Pub Date : 2023-06-05 DOI: 10.17129/botsci.3204

Katia V. Miranda-Gallegos, Armando Navarrete-Segueda, Jorge Cortés‐Flores, M. L. González-Arqueros, Estefanía E. Acosta-Pérez, G. Ibarra‐Manríquez

{"title":"Landscape heterogeneity drives spatial distribution of palm community in a Neotropical rainforest reserve affected by defaunation","authors":"Katia V. Miranda-Gallegos, Armando Navarrete-Segueda, Jorge Cortés‐Flores, M. L. González-Arqueros, Estefanía E. Acosta-Pérez, G. Ibarra‐Manríquez","doi":"10.17129/botsci.3204","DOIUrl":"https://doi.org/10.17129/botsci.3204","url":null,"abstract":"Background: Our study presents the first assessment of the relationships between environmental heterogeneity and the palm community at the landscape scale at the northern boundary of tropical rainforest distribution in America. \u0000Question: How does landscape-level heterogeneity (edaphic, topographic as well as the density, diversity, and tree biomass) shapes the palm community in a protected reserve affected by defaunation? \u0000Study site and date: The study was carried out in Los Tuxtlas Tropical Biology Station, Veracruz, Mexico (2020). \u0000Methods: We delineated landscape units (LUs) based on soil and geomorphology to characterize the biophysical mosaic. We built rank-abundance curves to compare the palm richness and their abundance among LUs. Permutational multivariate analysis of variance (PERMANOVA) and nonmetric multidimensional scaling (NMDS) were applied to detect shifts in the palm community across LUs. \u0000Results: Integrating abiotic and biotic components by delimiting LUs allowed us to evaluate the multifactorial effect of environmental heterogeneity on the palm community. The density and composition of the palms changed significantly among the LUs, influenced by soil coarse fragments, elevation, slope inclination, and annual precipitation. Tree richness and density had a significant effect on the palm community only when analyzed in combination with the soil-topography variables. \u0000Conclusions: The results reveal that there is high edaphic and topographic heterogeneity that influences palm species distribution at the landscape scale. The environmental heterogeneity approach allows capturing novel abiotic variation to explain the distribution patterns of palm species and their coexistence in highly diverse tropical communities.","PeriodicalId":54375,"journal":{"name":"Botanical Sciences","volume":" ","pages":""},"PeriodicalIF":1.4,"publicationDate":"2023-06-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44452337","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Fine-scale genetic structure of Magnolia iltisiana in forest regeneration sites with a history of selective logging 具有选择性采伐历史的森林更新地白玉兰精细尺度遗传结构

IF 1.4 4区生物学

Botanical Sciences Pub Date : 2023-06-03 DOI: 10.17129/botsci.3254

Ara Miguel-Peñaloza, J. Pérez-Alquicira, Yessica Rico

{"title":"Fine-scale genetic structure of Magnolia iltisiana in forest regeneration sites with a history of selective logging","authors":"Ara Miguel-Peñaloza, J. Pérez-Alquicira, Yessica Rico","doi":"10.17129/botsci.3254","DOIUrl":"https://doi.org/10.17129/botsci.3254","url":null,"abstract":"Background: Selective logging is a frequent practice in the Tropical Montane Cloud Forest which can impact forest regeneration and the genetic makeup of successive generations of trees. The spatial clustering of genetically related individuals, fine-scale genetic structure (FSGS), can develop from the reduction of gene dispersal and the decrease in the number of reproductive individuals at the local scale due to selective logging. \u0000Questions: In regeneration sites with a history of selective logging, does FSGS differ from a site without such a history? Is FSGS stronger in seedlings and saplings relative to juveniles and adults? Is genetic diversity similar among life stages and sites? \u0000Studied species: Magnolia iltisiana an endemic tree. \u0000Study site and dates: Sierra de Manantlan Biosphere Reserve, Jalisco, Mexico. \u00002020. \u0000Methods: We evaluated genetic diversity, genetic structure, and FSGS across four life stages (seedlings, saplings, juveniles, and adults) by genotyping 211 individuals with seven nuclear microsatellite loci in two regeneration and one conserved site. \u0000Results: We found statistically significant FSGS in the two regeneration sites only for seedlings and saplings, while no evidence of FSGS was detected in the conserved site. No differences in genetic diversity estimates and structure were found among life stages. \u0000Conclusions: Our study does not suggest an effect of selective logging on genetic diversity on the contrasted conditions and an FSGS pattern only in the earlier stages of the regeneration sites in M. iltisiana.","PeriodicalId":54375,"journal":{"name":"Botanical Sciences","volume":" ","pages":""},"PeriodicalIF":1.4,"publicationDate":"2023-06-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45732685","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Ecological knowledge, use and management of maax ik (Capsicum annuum var. glabriusculum (Dunal) Heiser & Pickersgill) in a rural Mayan community 玛雅农村社区maax ik (Capsicum annuum var. glabriusculum (Dunal) Heiser & Pickersgill)的生态知识、利用和管理

IF 1.4 4区生物学

Botanical Sciences Pub Date : 2023-06-03 DOI: 10.17129/botsci.3290

Virginia Solís-Montero, Miguel A. Munguía-Rosas, R. Bello-Bedoy

{"title":"Ecological knowledge, use and management of maax ik (Capsicum annuum var. glabriusculum (Dunal) Heiser & Pickersgill) in a rural Mayan community","authors":"Virginia Solís-Montero, Miguel A. Munguía-Rosas, R. Bello-Bedoy","doi":"10.17129/botsci.3290","DOIUrl":"https://doi.org/10.17129/botsci.3290","url":null,"abstract":"Background: Capsicum annuum var. glabriusculum is the ancestor of most of the economically important chiles in the world. It is widely distributed throughout Mexico, and currently all indigenous groups interact with this plant species. On the Yucatan Peninsula wild chile is known as maax ik by the Maya. Although this area has been recognized as a domestication and diversification center of chile, ethnobotanical research on this species is still limited. \u0000Questions: What ecological knowledge do local people have about maax ik? Where and how is maax ik gathered and managed? What uses does maax ik currently have? \u0000Studied species: Capsicum annuum var. glabriusculum \u0000Study site and dates: San Bernardo, Yucatan. Summer-Autumn 2021. \u0000Methods: In-depth semi-structured interviews and participatory observation. The management practices were identified, and management intensity was estimated. \u0000Results: Informants knew that maax ik reproduces sexually and recognized the role of birds in its seed dispersal. Maax ikwas mainly gathered from homegardens where this species was tolerated and other non-selective incipient management practices such as protection and promotion were also carried out. Fruit was harvested without harming the plant and only a small portion of the available fruit was usually taken. The informants used maax ik essentially as food. The management intensity index was relatively high (5). \u0000Conclusions: Maax ik is a sustenance food resource that is sustainably used and non-selectively managed in homegardens by our informants in San Bernardo, Yucatan.","PeriodicalId":54375,"journal":{"name":"Botanical Sciences","volume":" ","pages":""},"PeriodicalIF":1.4,"publicationDate":"2023-06-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44673030","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Phenotype differentiation of Capsicum annuum var. glabriusculum of three regions in Mexico and its relation to climate 墨西哥三个地区辣椒的表型分化及其与气候的关系

IF 1.4 4区生物学

Botanical Sciences Pub Date : 2023-05-26 DOI: 10.17129/botsci.3289

C. E. Romero-Higareda, S. Hernández-Verdugo, Antonio Pacheco-Olvera, J. E. Retes-Manjarrez, T. Osuna-Enciso, Á. Valdez-Ortiz

{"title":"Phenotype differentiation of Capsicum annuum var. glabriusculum of three regions in Mexico and its relation to climate","authors":"C. E. Romero-Higareda, S. Hernández-Verdugo, Antonio Pacheco-Olvera, J. E. Retes-Manjarrez, T. Osuna-Enciso, Á. Valdez-Ortiz","doi":"10.17129/botsci.3289","DOIUrl":"https://doi.org/10.17129/botsci.3289","url":null,"abstract":"Background: Populations of Capsicum annuum var. glabriusculum are found in a wide portion of the Mexican territory, and it is ancestor of many cultivated forms relevant for the Mexican diet. \u0000Questions: What are the proportions of phenotypic and genetic variation distributed among its sampled regions, populations and within populations. How does the climate correlates to the population’s phenotypic variation. \u0000Species: Capsicum annuum var. glabriusculum. \u0000Study sites and years: 24 populations form three regions were sampled: Northwest, states of Sonora and Sinaloa; South: Oaxaca and Southeast Tabasco and Yucatán, in Mexico. The experiment was performed between years 2016 to 2018. \u0000Methods: Fruits from single plants were collected in wild populations. Plants were grown in a greenhouse. Nested ANOVAS were performed to estimate phenotypic and genetic variance components for different spatial scales. Climate correlation was estimated through univariate and multivariate methods. \u0000Results: 49.8 % of phenotypic variation was detected within families, 11.1 % among families (within populations), 21.3 % among populations and 17.6 % among regions. The genetic basis of phenotypic variation was 50.1% on average, for this genetic variation 34.2 % was found among regions, 39.4% among populations and 26.3 % within populations. Climate factors generated different patterns of correlations for vegetative, foliar and reproductive traits. \u0000Conclusions: Northwest plants were shorth, with small leaves and large fruits, Southeast plants were tall, with large leaves and small fruits, South plants developed intermediate phenotypic traits. Climate explained a large proportion of phenotypic differentiation.","PeriodicalId":54375,"journal":{"name":"Botanical Sciences","volume":" ","pages":""},"PeriodicalIF":1.4,"publicationDate":"2023-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44772208","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Are nurse plants useful for facilitating the reintroduction of mid- and late successional tree species in tropical montane cloud forests? 护理植物对促进热带山地云雾林中后期演替树种的重新引入有用吗?

IF 1.4 4区生物学

Botanical Sciences Pub Date : 2023-05-25 DOI: 10.17129/botsci.3236

J. A. Flores-Cano, S. M. Gelviz-Gelvez, David Douterlungne, E. Badano

{"title":"Are nurse plants useful for facilitating the reintroduction of mid- and late successional tree species in tropical montane cloud forests?","authors":"J. A. Flores-Cano, S. M. Gelviz-Gelvez, David Douterlungne, E. Badano","doi":"10.17129/botsci.3236","DOIUrl":"https://doi.org/10.17129/botsci.3236","url":null,"abstract":"Background: In Mexico, where 50 % of the original Tropical montane cloud forest (TMCF) has been lost due to human activities, the restoration of these forests is essential. \u0000Questions and/or hypotheses: (1) L. styraciflua favors the survival and growth of Q. germana and M. schiedeana species (2) Are there competitive effects between nurses and beneficiary species? and (3) Is the magnitude of these positive/negative interspecific interactions affected by the canopy cover of nurses? \u0000Studied species: Liquidambar styraciflua L. (pioneer tree), Magnolia schiedeana Schltdl. (mid-successional tree) and Quercus germana Schltdl. & Cham. (late-successional tree). \u0000Study site and dates: A fallow in Xilitla, state of San Luis Potosí, Mexico, between 2016 and 2018. \u0000Methods: Seedling of mid- and late-successional species were transplanted 0.3 m and 2 m away from the stems of pioneer tree (protected and unprotected saplings, respectively). Performance of the species were compared after two years and the effects of canopy cover of pioneer trees. \u0000Results: Pioneer trees facilitated the establishment probabilities of the mid-and late-successional ones. Increasing canopy cover of pioneer trees enhanced the establishment probabilities of both beneficiary species. \u0000Conclusions: Joint transplanting of pioneer trees with mid- and late-successional tree seedlings in their close vicinity is a strategy to favor the recovery of the ecosystem.","PeriodicalId":54375,"journal":{"name":"Botanical Sciences","volume":" ","pages":""},"PeriodicalIF":1.4,"publicationDate":"2023-05-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43964899","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

High vascular plant species richness in the Usumacinta River Basin: a comprehensive floristic checklist for a natural region in the Mesoamerican biodiversity hotspot Usumacinta河流域维管植物物种丰富度高:中美洲生物多样性热点自然区域的综合植物区系清单

IF 1.4 4区生物学

Botanical Sciences Pub Date : 2023-05-19 DOI: 10.17129/botsci.3253

D. A. Jiménez-López, J. A. Gallardo-Cruz, Mario Esteban Véliz, Rubén Martínez-Camilo, Claudio Méndez, J. Solórzano, Luis Velázquez-Méndez, J. Carabias, Gabriela García-Hidalgo, Candelario Peralta-Carreta, M. Sánchez-González, O. Castillo-Acosta, N. M. Luna-Kamyshev, J. Villaseñor, J. Meave

{"title":"High vascular plant species richness in the Usumacinta River Basin: a comprehensive floristic checklist for a natural region in the Mesoamerican biodiversity hotspot","authors":"D. A. Jiménez-López, J. A. Gallardo-Cruz, Mario Esteban Véliz, Rubén Martínez-Camilo, Claudio Méndez, J. Solórzano, Luis Velázquez-Méndez, J. Carabias, Gabriela García-Hidalgo, Candelario Peralta-Carreta, M. Sánchez-González, O. Castillo-Acosta, N. M. Luna-Kamyshev, J. Villaseñor, J. Meave","doi":"10.17129/botsci.3253","DOIUrl":"https://doi.org/10.17129/botsci.3253","url":null,"abstract":"Background: Mesoamerica is one of the most important biodiversity hotspots on the planet. Despite significant efforts made over two centuries to contribute to the floristic knowledge of this region, our understanding of its flora is still scattered and uneven. \u0000Questions: What is the magnitude of the vascular plant species richness in the Usumacinta River Basin? \u0000Study site and dates: Usumacinta River Basin (Guatemala and Mexico), 1838-2018. \u0000Methods: We compiled the checklist by systematizing the floristic information acquired from various sources derived from numerous floristic and ecological studies. \u0000Results: We recorded 6,977 species, 1,892 genera and 274 families. The largest numbers of species (5,746) and records (58,859) correspond to the Mexican portion of the Usumacinta River Basin, compared to its Guatemalan counterpart (4,445 species and 19,952 records). The most species-rich families were Orchidaceae (598 species), Fabaceae (512), and Asteraceae (476). The prevalence of these and all other families with significant contributions to the flora varied among three elevation-defined sectors into which the Usumacinta River Basin was subdivided (lower, middle, and upper basin). \u0000Conclusions: The Usumacinta River Basin is a strategic region for plant biodiversity conservation as it hosts almost one third of all vascular plant species known for Mesoamerica and ca. 6 % of the entire flora in the Americas. Further botanical exploration should focus on those areas of the basin for which little or no information is available in order to gain a better appreciation of its flora.","PeriodicalId":54375,"journal":{"name":"Botanical Sciences","volume":" ","pages":""},"PeriodicalIF":1.4,"publicationDate":"2023-05-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47570470","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Centrosema flavescens (Fabaceae, Papilionoideae), a new species from the Yucatan Peninsula, Mexico 黄中心丝菌（Fabeae，Papilioideae），墨西哥尤卡坦半岛的一个新种

IF 1.4 4区生物学

Botanical Sciences Pub Date : 2023-05-19 DOI: 10.17129/botsci.3300

Germán Carnevali Fernández-Concha, D. Angulo, J. T. Tapia Muñoz, Ivon M. Ramírez Morillo, Rodrigo Duno de Stefano

{"title":"Centrosema flavescens (Fabaceae, Papilionoideae), a new species from the Yucatan Peninsula, Mexico","authors":"Germán Carnevali Fernández-Concha, D. Angulo, J. T. Tapia Muñoz, Ivon M. Ramírez Morillo, Rodrigo Duno de Stefano","doi":"10.17129/botsci.3300","DOIUrl":"https://doi.org/10.17129/botsci.3300","url":null,"abstract":"Background: Centrosema (Fabaceae) includes 35-44 species in the New World, 10 in Mexico, and 9 in the Yucatan Peninsula. Most species have trifoliolate leaves and bicolored flowers. Unifoliolate leaves are an infrequent character that is found in a few species, e.g., C. sagittatum (Humb. & Bonpl. ex Willd.) Brandegee, but monochromatic flowers, e.g, lacking nectar guides, is even a more unusual character state. Several populations of a Centrosema from the Yucatan Peninsula share both character states, a combination that sets them apart from other members of the genus. \u0000Question: Is the Centrosema with unifoliolate leaves, alate petioles, and monochromatic flowers of the Yucatan Peninsula, a species distinct from the phenetically similar C. sagittatum? \u0000Studies species: Centrosema (Fabaceae, Papilionoideae). \u0000Study site and dates: Yucatan Peninsula, Mexico, 2021-2023. \u0000Methods: Botanical specimens were collected and determined taxonomically through the use of relevant literature, keys, and the consulting of botanical collections. The conservation status of the new species was assessed using the IUCN methodology. \u0000Results: The specimens collected do represent an undescribed species that differs from Centrosema sagittatum by its smaller, cream-yellow, monochromatic flowers. The species is assessed as Endangered (EN). \u0000Conclusions: A new species, Centrosema flavescens from the Yucatan Peninsula is proposed. Eleven species of Centrosema are now recognized in Mexico, nine in the Yucatan Peninsula. C. sagittatum does not occur in the Yucatan peninsula.","PeriodicalId":54375,"journal":{"name":"Botanical Sciences","volume":" ","pages":""},"PeriodicalIF":1.4,"publicationDate":"2023-05-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46124911","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

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