Pub Date : 2022-08-09DOI: 10.1894/0038-4909-66.2.120
Onésimo Rocha-Ugalde, J. G. Martínez-Ávalos, E. de la Rosa-Manzano, Juan Manuel Ortega-Rodríguez, C. Sáenz-Romero
Abstract We analyzed the distribution of climatic habitat suitable for biomes of the state of Tamaulipas, Mexico, under the contemporary climate (1961–1990) and projected to the decade centered on the year 2030. This was achieved through previous modeling of the climatic habitat using random forest of the program R and six different climatic model scenarios. By the year 2030, there will be a reduction in the area occupied by a climatic habitat suitable for temperate biomes: conifer forests (–100% change relative to the area currently occupied), San Lucas pine-oak woodland (–100%), and Madrean-Transvolcanic pine-oak woodland (–34%). In contrast, climatic habitats suitable for dry biomes will expand and some will appear that do not currently exist in Tamaulipas, such as the Sinaloa–Guerrero thornscrub (+38% of the state area occupied). In the area occupied by the Biosphere Reserve “El Cielo,” suitable climatic habitat will diminish for the Gulf Coast thornscrub (–100%), tropical semievergreen forest (–100%), and cloud forest (–99%); however, suitable climatic habitat will increase inside that Reserve for the biomes chaparral (+1,703%) and Madrean-Transvolcanic pine-oak woodland (+33%). In addition, habitat suitable for the dry deciduous forest of Sinaloa will appear (+22% of the area of the Reserve, previously nonexistent). For the Biosphere Reserve “Sierra de Tamaulipas,” suitable climatic habitat will be lost mainly for the biomes chaparral (–92%) and Madrean-Transvolcanic pine-oak woodland (–89%). However, habitat suitable to the dry deciduous forest of Sinaloa will appear (66% of the area of the Reserve, which does not currently exist). Modification of the climatic habitat could imply serious challenges for the conservation and management of contemporary vegetation and may provide evidence that the in situ measures of conservation in place for these biome types in the state are insufficient, even within the Biosphere Reserves. Resumen La distribución del hábitat climático propicio para los biomas del estado de Tamaulipas, México, se analizó bajo el clima contemporáneo (1961–1990) y se proyectó a la década centrada en el año 2030. Esto se logró mediante el modelado previo del hábitat climático utilizando el módulo RandomForest del programa R y seis diferentes modelos-escenarios climáticos. Para el 2030, habrá una reducción en el área ocupada por un hábitat climático propicio para biomas templados: bosques de coníferas (pérdida: –100% de cambio en relación con el área actualmente ocupada), bosques de pino-encino de San Lucas (–100%) y bosque de pino-encino de la Sierra Madre y Transvolcánico (–34%). En contraste, los hábitats climáticos propicios para biomas secos se expandirán y aparecerán algunos que actualmente no existen en Tamaulipas, como el matorral espinoso de Sinaloa-Guerrero (ganancia: +38% del área estatal ocupada). En el área ocupada por la Reserva de la Biosfera “El Cielo”, el hábitat climático adecuado disminuirá para el matorral es
摘要我们分析了适应墨西哥塔毛利帕斯州生物群落的气候栖息地在当代气候（1961-1990年）下的分布，并预测到2030年的十年。这是通过以前使用R计划的随机森林和六个不同的气候模型场景对气候栖息地进行建模来实现的。到2030年，适合温带生物群落的气候栖息地所占面积将减少：针叶树森林（-100%与目前占领的地区相比发生变化）、圣卢卡斯松树-橡树林地（-100%）和马德里-火山过渡松树-橡树林地（-34%）。相比之下，适合干生物群落的气候栖息地将扩大，塔毛利帕斯目前似乎不存在一些气候栖息地，如锡那罗亚-格雷罗-桑斯克鲁布（+38%的州面积）。在生物圈保护区“天空”占据的地区，适合海湾海岸荆棘（-100%）、热带半常绿森林（-100%）和云林（-99%）的气候栖息地将减少；然而，该保护区内的Chaparral生物群（+1703%）和Madrian-Transvolcanic Pine-Oak Woodland生物群（+33%）将增加适当的气候栖息地。此外，还将出现适合锡那罗亚干燥落叶林的栖息地（+22%的保护区面积，以前不存在）。对于“Sierra de Tamaulipas”生物圈保护区来说，合适的气候栖息地将主要丧失在Chaparral（-92%）和Madrian-Transvolcanic Pine-Oak Woodland（-89%）生物群落中。然而，将出现适合锡那罗亚干燥落叶森林的栖息地（保护区面积的66%，目前不存在）。气候栖息地的变化可能对当代植被的保护和管理构成严重挑战，并可能提供证据表明，即使在生物圈保护区内，该州对这些生物群落类型采取的现场保护措施也不足。摘要在当代气候（1961-1990年）下分析了墨西哥塔毛利帕斯州有利于生物群落的气候栖息地的分布，并预测了以2030年为中心的十年。这是通过使用R计划的随机森林模块和六种不同的模型-气候情景对气候栖息地进行预先建模来实现的。到2030年，由有利于温带生物群落的气候栖息地占据的地区将减少：针叶树森林（与目前占领的地区相比，损失：-100%）、圣卢卡斯松林（-100%）和马德雷山脉和过渡火山松林（-34%）。相比之下，有利于干生物群落的气候栖息地将扩大，塔毛利帕斯目前不存在的一些气候栖息地将出现，例如锡那罗亚-格雷罗的荆棘灌木丛（收益：+38%的被占领州面积）。在“天空”生物圈保护区占领的地区，墨西哥湾沿岸多刺灌木丛（-100%）、半多年生热带森林（-100%）和山地中生林（-99%）的适当气候栖息地将减少；然而，在这一保护区内，查帕拉尔生物群落（+1703%）和马德雷山脉和跨火山松柏林（+33%）的有利气候栖息地将增加。此外，锡那罗亚干燥的落叶森林（+22%的保护区，以前不存在）将出现有利的栖息地。对于“Sierra de Tamaulipas”生物圈保护区，有利的气候栖息地将主要丧失在Chaparral生物群落（-92%）和Madre和Transvolcanic Sierra松树-橡树林（-89%）。然而，锡那罗亚的干燥落叶森林（保护区面积的66%，目前不存在）将出现有利的栖息地。气候栖息地的变化可能对当代植被的保护和管理构成严重挑战，并可能提供证据表明，即使在生物圈保护区内，该州对这些类型的生物群落的现场保护措施也不足。
{"title":"IMPACT OF CLIMATE CHANGE ON BIOMES OF TAMAULIPAS AND BIOSPHERE RESERVES, EL CIELO AND SIERRA DE TAMAULIPAS, IN MEXICO","authors":"Onésimo Rocha-Ugalde, J. G. Martínez-Ávalos, E. de la Rosa-Manzano, Juan Manuel Ortega-Rodríguez, C. Sáenz-Romero","doi":"10.1894/0038-4909-66.2.120","DOIUrl":"https://doi.org/10.1894/0038-4909-66.2.120","url":null,"abstract":"Abstract We analyzed the distribution of climatic habitat suitable for biomes of the state of Tamaulipas, Mexico, under the contemporary climate (1961–1990) and projected to the decade centered on the year 2030. This was achieved through previous modeling of the climatic habitat using random forest of the program R and six different climatic model scenarios. By the year 2030, there will be a reduction in the area occupied by a climatic habitat suitable for temperate biomes: conifer forests (–100% change relative to the area currently occupied), San Lucas pine-oak woodland (–100%), and Madrean-Transvolcanic pine-oak woodland (–34%). In contrast, climatic habitats suitable for dry biomes will expand and some will appear that do not currently exist in Tamaulipas, such as the Sinaloa–Guerrero thornscrub (+38% of the state area occupied). In the area occupied by the Biosphere Reserve “El Cielo,” suitable climatic habitat will diminish for the Gulf Coast thornscrub (–100%), tropical semievergreen forest (–100%), and cloud forest (–99%); however, suitable climatic habitat will increase inside that Reserve for the biomes chaparral (+1,703%) and Madrean-Transvolcanic pine-oak woodland (+33%). In addition, habitat suitable for the dry deciduous forest of Sinaloa will appear (+22% of the area of the Reserve, previously nonexistent). For the Biosphere Reserve “Sierra de Tamaulipas,” suitable climatic habitat will be lost mainly for the biomes chaparral (–92%) and Madrean-Transvolcanic pine-oak woodland (–89%). However, habitat suitable to the dry deciduous forest of Sinaloa will appear (66% of the area of the Reserve, which does not currently exist). Modification of the climatic habitat could imply serious challenges for the conservation and management of contemporary vegetation and may provide evidence that the in situ measures of conservation in place for these biome types in the state are insufficient, even within the Biosphere Reserves. Resumen La distribución del hábitat climático propicio para los biomas del estado de Tamaulipas, México, se analizó bajo el clima contemporáneo (1961–1990) y se proyectó a la década centrada en el año 2030. Esto se logró mediante el modelado previo del hábitat climático utilizando el módulo RandomForest del programa R y seis diferentes modelos-escenarios climáticos. Para el 2030, habrá una reducción en el área ocupada por un hábitat climático propicio para biomas templados: bosques de coníferas (pérdida: –100% de cambio en relación con el área actualmente ocupada), bosques de pino-encino de San Lucas (–100%) y bosque de pino-encino de la Sierra Madre y Transvolcánico (–34%). En contraste, los hábitats climáticos propicios para biomas secos se expandirán y aparecerán algunos que actualmente no existen en Tamaulipas, como el matorral espinoso de Sinaloa-Guerrero (ganancia: +38% del área estatal ocupada). En el área ocupada por la Reserva de la Biosfera “El Cielo”, el hábitat climático adecuado disminuirá para el matorral es","PeriodicalId":51157,"journal":{"name":"Southwestern Naturalist","volume":null,"pages":null},"PeriodicalIF":0.2,"publicationDate":"2022-08-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45495800","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-08-08DOI: 10.1894/0038-4909-66.2.102
J. Mead, Thomas R. Van Devender, G. M. Ferguson, S. Hale
Abstract We present the Late Pleistocene extinct shrub-ox, Euceratherium collinum (Bovidae), dung pellets recovered from Pontatoc Ridge Shelter, a dry alcove in the Santa Catalina Mountains of southern Arizona. The shelter is at the current upper edge of the Arizona Upland subdivision (the highest and coldest part) of the Sonoran Desert. Packrat (Neotoma) middens with macrobotanical fossils and a floor deposit consisting of midden debris and dung pellets were sampled and are described here. Six packrat middens radiocarbon date to 15,690–22,874 cal yr B.P. (calibrated years before present); dung pellets from the floor deposit date to 14,990 cal yr B.P. Macrobotanical fossils primarily from the middens but also from the floor deposit indicate that a woodland composed of Arizona cypress (Hesperocyparis [Cupressus] arizonica), Douglas fir (Pseudotsuga menziesii), ponderosa pine (Pinus ponderosa), a hybrid singleleaf pinyon pine (Pinus monophylla var. fallax), border pinyon (Pinus discolor), juniper (Juniperus), manzanita (Arctostaphylos pungens), and canyon live oak (Quercus chrysolepis) grew outside the shelter. Dung pellets were measured, compared with other extant and extinct species, and sampled for phytoliths and pollen. Based on size, morphology, DNA, and physiographic setting (cliff face), our assumption is that only a single taxon of slickrock-climbing ruminant used the small, extremely inaccessible Pontatoc Ridge Shelter and that all large pellets belong to the extinct shrub-ox. The distribution of Late Pleistocene shrub-ox is reviewed; the stocky, rather short ruminant is recovered mainly in mountainous and canyon-county terrains of western United States and northern Mexico. Resumen Presentamos los coprolitos del buey arbustivo Euceratherium collinum (Bovidae) extinto del Pleistoceno tardío recuperados del refugio Pontatoc Ridge, un nicho seco en las montañas de Santa Catalina en el sur de Arizona. El refugio se encuentra en el borde más alto actual de la subdivisión de las tierras altas de Arizona (la parte más alta y fría) del desierto de Sonora. Se tomaron muestras de basureros de la rata de campo (Neotoma) con fósiles macrobotánicos y de un depósito en el suelo compuesto por coprolitos y escombros de los basureros de ratas del campo, que se describen aquí. Seis basureros de ratas de campo tienen fechas de radiocarbono 15,690–28,874 años cal A.P. (calibrado años antes del presente); los coprolitos tomados del piso del refugio tienen una fecha de 14,990 años cal A.P. Los fósiles macrobotánicos principalmente de los basureros de ratas del campo, pero también de los depósitos del piso, indican que un bosque compuesto de ciprés de Arizona (Hesperocyparis [Cupressus] arizonica), abeto de Douglas (Pseudotsuga menziesii), pino ponderosa (Pinus ponderosa), un híbrido de pino piñón de una sola hoja (Pinus monophylla var. fallax), piñón de borde (Pinus discolor), enebro (Juniperus), manzanita (Arctostaphylos pungens) y encino de cañón (Quercus chr
摘要本文报道了在美国亚利桑那州南部圣卡塔利娜山脉蓬塔塔克山脊避难所中发现的晚更新世已灭绝的灌木牛、牛科灌木牛(Euceratherium collinum)和粪球。该避难所位于索诺兰沙漠亚利桑那州高地分区(最高和最冷的部分)的上边缘。包鼠(Neotoma)的中甸与大型植物化石和地板沉积物组成的中甸碎片和粪便颗粒的采样和描述在这里。6个packrat middle的放射性碳年代为15,690-22,874 calyr B.P.(距今校准年);地面沉积物的大型植物化石主要来自于中部，也来自于地面沉积物，这些化石表明，这片林地由亚利桑柏树(Hesperocyparis[柏树]arizonica)、花旗松(pseudosuga menziesii)、黄松(Pinus ponderosa)、杂交单叶小松(Pinus monophylla var. fallax)、边缘小松(Pinus discolor)、杜松(Juniperus)、manzanita (Arctostaphylos pungens)组成。和峡谷活橡树(Quercus chrysolepis)生长在庇护所外。测量了粪便颗粒，与其他现存和灭绝的物种进行了比较，并对植物岩和花粉进行了采样。根据大小、形态、DNA和地理环境(悬崖表面)，我们的假设是，只有一个滑溜的反刍动物分类群使用了小的、极其难以接近的蓬塔托克山脊避难所，所有大的颗粒都属于灭绝的灌木牛。综述了晚更新世灌木-牛的分布;这种矮胖的反刍动物主要生活在美国西部和墨西哥北部的山区和峡谷地区。续写:现报告:los coprolitos del bubutivo Euceratherium colllinum(牛科)扩展到del更新世tardío在Pontatoc Ridge休养，unnicho seco en las montañas在Santa Catalina和el sur de Arizona。El refugio se encuentra en El borde más alto de la subdivisión de las tierras altas de Arizona (la partte más alta y fría) del deserto de Sonora。这些番茄都是由番茄和番茄组成的，它们是由番茄和番茄组成的，它们是由番茄和番茄组成的，它们是由番茄和番茄组成的，它们是由番茄组成的。(1)放射性碳技术的研究进展:15690 - 28,874 años calap (calibrado años antes del presente);墨西哥墨西哥墨西哥墨西哥墨西哥墨西哥墨西哥墨西哥墨西哥墨西哥墨西哥墨西哥墨西哥墨西哥墨西哥墨西哥墨西哥墨西哥墨西哥墨西哥墨西哥墨西哥墨西哥墨西哥墨西哥墨西哥墨西哥墨西哥墨西哥墨西哥墨西哥墨西哥墨西哥墨西哥墨西哥墨西哥墨西哥墨西哥墨西哥墨西哥墨西哥墨西哥墨西哥墨西哥墨西哥墨西哥墨西哥墨西哥墨西哥墨西哥墨西哥墨西哥墨西哥墨西哥墨西哥墨西哥墨西哥墨西哥墨西哥墨西哥墨西哥墨西哥墨西哥墨西哥墨西哥墨西哥墨西哥墨西哥墨西哥墨西哥墨西哥墨西哥墨西哥墨西哥墨西哥墨西哥墨西哥墨西哥墨西哥墨西哥墨西哥墨西哥manzanita(仙人掌)y encino de cañón(松柏)crecían fuera del refugio。其中，中介体与合生体存在差异，种与种之间存在差异，种与种之间存在差异，种与种之间存在差异，种与种之间存在差异。Con base en el tamaño, la morfología, el ADN y el entorno fisiográfico (cara del acantilado)， nuestra suposición es que solo un taxón de rumiantes trepadores de rocas resbaladizas usó el pequeño y extremadamente难以进入的难民Pontatoc Ridge y que todos los coprolitos grandes pertenence bubutivo extinto。Se revisa la distribución del buy arbustivo del Pleistoceno tardío;通过建立健壮的门户，我们可以看到，通过建立健壮的门户，我们可以恢复一个基本原则，例如:montañosos通过建立健壮的门户cañones。UU。我的名字叫“我的生日”。
{"title":"LATE PLEISTOCENE SHRUB-OX (EUCERATHERIUM COLLINUM), PONTATOC RIDGE SHELTER, SANTA CATALINA MOUNTAINS, SOUTHEASTERN ARIZONA","authors":"J. Mead, Thomas R. Van Devender, G. M. Ferguson, S. Hale","doi":"10.1894/0038-4909-66.2.102","DOIUrl":"https://doi.org/10.1894/0038-4909-66.2.102","url":null,"abstract":"Abstract We present the Late Pleistocene extinct shrub-ox, Euceratherium collinum (Bovidae), dung pellets recovered from Pontatoc Ridge Shelter, a dry alcove in the Santa Catalina Mountains of southern Arizona. The shelter is at the current upper edge of the Arizona Upland subdivision (the highest and coldest part) of the Sonoran Desert. Packrat (Neotoma) middens with macrobotanical fossils and a floor deposit consisting of midden debris and dung pellets were sampled and are described here. Six packrat middens radiocarbon date to 15,690–22,874 cal yr B.P. (calibrated years before present); dung pellets from the floor deposit date to 14,990 cal yr B.P. Macrobotanical fossils primarily from the middens but also from the floor deposit indicate that a woodland composed of Arizona cypress (Hesperocyparis [Cupressus] arizonica), Douglas fir (Pseudotsuga menziesii), ponderosa pine (Pinus ponderosa), a hybrid singleleaf pinyon pine (Pinus monophylla var. fallax), border pinyon (Pinus discolor), juniper (Juniperus), manzanita (Arctostaphylos pungens), and canyon live oak (Quercus chrysolepis) grew outside the shelter. Dung pellets were measured, compared with other extant and extinct species, and sampled for phytoliths and pollen. Based on size, morphology, DNA, and physiographic setting (cliff face), our assumption is that only a single taxon of slickrock-climbing ruminant used the small, extremely inaccessible Pontatoc Ridge Shelter and that all large pellets belong to the extinct shrub-ox. The distribution of Late Pleistocene shrub-ox is reviewed; the stocky, rather short ruminant is recovered mainly in mountainous and canyon-county terrains of western United States and northern Mexico. Resumen Presentamos los coprolitos del buey arbustivo Euceratherium collinum (Bovidae) extinto del Pleistoceno tardío recuperados del refugio Pontatoc Ridge, un nicho seco en las montañas de Santa Catalina en el sur de Arizona. El refugio se encuentra en el borde más alto actual de la subdivisión de las tierras altas de Arizona (la parte más alta y fría) del desierto de Sonora. Se tomaron muestras de basureros de la rata de campo (Neotoma) con fósiles macrobotánicos y de un depósito en el suelo compuesto por coprolitos y escombros de los basureros de ratas del campo, que se describen aquí. Seis basureros de ratas de campo tienen fechas de radiocarbono 15,690–28,874 años cal A.P. (calibrado años antes del presente); los coprolitos tomados del piso del refugio tienen una fecha de 14,990 años cal A.P. Los fósiles macrobotánicos principalmente de los basureros de ratas del campo, pero también de los depósitos del piso, indican que un bosque compuesto de ciprés de Arizona (Hesperocyparis [Cupressus] arizonica), abeto de Douglas (Pseudotsuga menziesii), pino ponderosa (Pinus ponderosa), un híbrido de pino piñón de una sola hoja (Pinus monophylla var. fallax), piñón de borde (Pinus discolor), enebro (Juniperus), manzanita (Arctostaphylos pungens) y encino de cañón (Quercus chr","PeriodicalId":51157,"journal":{"name":"Southwestern Naturalist","volume":null,"pages":null},"PeriodicalIF":0.2,"publicationDate":"2022-08-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48180966","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-08-08DOI: 10.1894/0038-4909-66.2.114
K. Keeler
Abstract I observed individual western harvester ant (Pogonomyrmex occidentalis) colonies, marked between 1977 and 1994, to live a mean of 15.65 years (n = 112). The longest-lived colony lived 42 years. Resumen Observé que colonias de hormigas cosechadoras occidentales (Pogonomyrmex occidentalis), marcadas entre 1977 y 1994, sobrevivieron una media de 15.65 años (n = 112). La colonia que vivió más tiempo sobrevivió 42 años.
{"title":"LONGITUDINAL STUDY OF POGONOMYRMEX OCCIDENTALIS (HYMENOPTERA: FORMICIDEAE), WESTERN HARVESTER ANT, COLONY SURVIVAL IN WESTERN NEBRASKA","authors":"K. Keeler","doi":"10.1894/0038-4909-66.2.114","DOIUrl":"https://doi.org/10.1894/0038-4909-66.2.114","url":null,"abstract":"Abstract I observed individual western harvester ant (Pogonomyrmex occidentalis) colonies, marked between 1977 and 1994, to live a mean of 15.65 years (n = 112). The longest-lived colony lived 42 years. Resumen Observé que colonias de hormigas cosechadoras occidentales (Pogonomyrmex occidentalis), marcadas entre 1977 y 1994, sobrevivieron una media de 15.65 años (n = 112). La colonia que vivió más tiempo sobrevivió 42 años.","PeriodicalId":51157,"journal":{"name":"Southwestern Naturalist","volume":null,"pages":null},"PeriodicalIF":0.2,"publicationDate":"2022-08-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42342647","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-08-08DOI: 10.1894/0038-4909-66.2.91
Charles B. Withnell, C. J. Bell, C. Jass
Abstract An accumulation of Pleistocene owl pellets (strigilites) containing 30 arvicoline rodent teeth was found at the Little Dell Dam fossil site outside of Salt Lake City, Salt Lake County, Utah, in 1992. The accumulation was recovered in a single block of matrix with partially exposed teeth. We used high-resolution x-ray computed tomography (CT) to segment, digitally prepare, and describe teeth belonging to Allophaiomys pliocaenicus, Mictomys kansasensis, or Mictomys meltoni, and a previously recognized but unnamed morphotype of Phenacomys. Digital preparation revealed 10 associated upper or lower dentitions of those taxa. A reinterpretation of the age of the site (∼150 thousand years ago) using arvicoline rodent biochronology was made based on recent research at Cathedral Cave, Nevada. The new estimate is a much younger age for the Little Dell Dam fauna from Locality 2 than was previously reported. Resumen Se encontró en 1992 una acumulación de regurgitaciones estrígidas del Pleistoceno (estrigilitas) que contienen 30 dientes de roedor arvicolina en el sitio de fósiles de la presa Little Dell, en las afueras de Salt Lake City, condado de Salt Lake, Utah. La acumulación se recuperó en un solo bloque de matriz con dientes parcialmente expuestos. Utilizamos tomografía computarizada (TC) de rayos X de alta resolución para segmentar, preparar digitalmente y describir dientes pertenecientes a Allophaiomys pliocaenicus, Mictomys kansasensis o Mictomys meltoni, y un morfotipo de Phenacomys previamente reconocido pero sin nombre. La preparación digital reveló diez denticiones superiores o inferiores asociadas de esos taxones. Se realizó una reinterpretación de la edad del sitio (∼ 150 ka) usando biocronología de roedores arvicolina basada en una investigación reciente en Cathedral Cave, Nevada. Esa es una edad mucho más temprana para la fauna de la presa Little Dell de la localidad 2 de lo que se informó anteriormente.
摘要1992年，在美国犹他州盐湖城外的小戴尔坝化石遗址发现了一堆含有30颗arvicoline啮齿动物牙齿的更新世猫头鹰颗粒(榴石)。堆积在一块部分露出牙齿的基质中被恢复。我们使用高分辨率x射线计算机断层扫描(CT)来分割、数字制备和描述属于Allophaiomys pliocaenicus、Mictomys kansasensis或Mictomys meltoni的牙齿，以及以前发现但未命名的Phenacomys形态。数字准备显示了这些分类群的10个相关的上或下牙列。根据最近在内华达州大教堂洞穴(Cathedral Cave)的研究，利用arvicoline啮齿动物生物年代学重新解释了该遗址的年龄(约15万年前)。新的估计是小戴尔坝动物群的年龄比以前报道的要小得多。resume Se encontró en 1992 una acumulación de regurgitaciones estrígidas del Pleistoceno (estrigilitas) que continenen 30 dientes de roedor arvicolina en sittio de fósiles de la presa Little Dell, en las afueras de Salt Lake condado de Salt Lake, Utah。La acumulación se recuperó en un solo bloque de matriz condies specialmentes exuestos。利用tomografía computarizada (TC) de rayos X de alta resolución para segment，编制数字化描述dientes pertencientes、Allophaiomys pliocaenicus、Mictomys kansasensis、Mictomys meltoni，以及morfotipo de Phenacomys preconocido perconocido的命名。La preparación digital reveló diez denticiones superior o inferies associadas de esos taxones。Se realizó una reinterpretación de la edad del sitio (~ 150 ka) usando biocronología de roedores arvicolina basada en una investigación reciente en Cathedral Cave, Nevada。这是一个非常有趣的地方más temprana para la fauna de la presa Little Dell de la localidad 2 de loque se informó teriorte。
{"title":"EXTRAORDINARY ACCUMULATION OF ARVICOLINE RODENTS FROM LITTLE DELL DAM (PLEISTOCENE), UTAH","authors":"Charles B. Withnell, C. J. Bell, C. Jass","doi":"10.1894/0038-4909-66.2.91","DOIUrl":"https://doi.org/10.1894/0038-4909-66.2.91","url":null,"abstract":"Abstract An accumulation of Pleistocene owl pellets (strigilites) containing 30 arvicoline rodent teeth was found at the Little Dell Dam fossil site outside of Salt Lake City, Salt Lake County, Utah, in 1992. The accumulation was recovered in a single block of matrix with partially exposed teeth. We used high-resolution x-ray computed tomography (CT) to segment, digitally prepare, and describe teeth belonging to Allophaiomys pliocaenicus, Mictomys kansasensis, or Mictomys meltoni, and a previously recognized but unnamed morphotype of Phenacomys. Digital preparation revealed 10 associated upper or lower dentitions of those taxa. A reinterpretation of the age of the site (∼150 thousand years ago) using arvicoline rodent biochronology was made based on recent research at Cathedral Cave, Nevada. The new estimate is a much younger age for the Little Dell Dam fauna from Locality 2 than was previously reported. Resumen Se encontró en 1992 una acumulación de regurgitaciones estrígidas del Pleistoceno (estrigilitas) que contienen 30 dientes de roedor arvicolina en el sitio de fósiles de la presa Little Dell, en las afueras de Salt Lake City, condado de Salt Lake, Utah. La acumulación se recuperó en un solo bloque de matriz con dientes parcialmente expuestos. Utilizamos tomografía computarizada (TC) de rayos X de alta resolución para segmentar, preparar digitalmente y describir dientes pertenecientes a Allophaiomys pliocaenicus, Mictomys kansasensis o Mictomys meltoni, y un morfotipo de Phenacomys previamente reconocido pero sin nombre. La preparación digital reveló diez denticiones superiores o inferiores asociadas de esos taxones. Se realizó una reinterpretación de la edad del sitio (∼ 150 ka) usando biocronología de roedores arvicolina basada en una investigación reciente en Cathedral Cave, Nevada. Esa es una edad mucho más temprana para la fauna de la presa Little Dell de la localidad 2 de lo que se informó anteriormente.","PeriodicalId":51157,"journal":{"name":"Southwestern Naturalist","volume":null,"pages":null},"PeriodicalIF":0.2,"publicationDate":"2022-08-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48167609","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-07-26DOI: 10.1894/0038-4909-67.2.149
W. C. Sherbrooke, Cecilia Aguilar-Morales, Nora L. Villanueva-Gutiérrez, Thomas R. Van Devender
{"title":"RAIN-HARVEST DRINKING BY PHRYNOSOMA DITMARSI IN SONORA, MEXICO","authors":"W. C. Sherbrooke, Cecilia Aguilar-Morales, Nora L. Villanueva-Gutiérrez, Thomas R. Van Devender","doi":"10.1894/0038-4909-67.2.149","DOIUrl":"https://doi.org/10.1894/0038-4909-67.2.149","url":null,"abstract":"","PeriodicalId":51157,"journal":{"name":"Southwestern Naturalist","volume":null,"pages":null},"PeriodicalIF":0.2,"publicationDate":"2022-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44691089","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-07-26DOI: 10.1894/0038-4909-67.2.152
W. C. Sherbrooke, Cecilia Aguilar-Morales, Thomas R. Van Devender
{"title":"DEFENSIVE HORN RAISING BY HORNED LIZARDS (PHRYNOSOMA): A UNIQUE BEHAVIORAL RESPONSE IN PHRYNOSOMATID LIZARDS?","authors":"W. C. Sherbrooke, Cecilia Aguilar-Morales, Thomas R. Van Devender","doi":"10.1894/0038-4909-67.2.152","DOIUrl":"https://doi.org/10.1894/0038-4909-67.2.152","url":null,"abstract":"","PeriodicalId":51157,"journal":{"name":"Southwestern Naturalist","volume":null,"pages":null},"PeriodicalIF":0.2,"publicationDate":"2022-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44430074","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-07-26DOI: 10.1894/0038-4909-67.2.158
Brandi M. Christiano, M. Ryan
{"title":"DIET OF BRAZILIAN FREE-TAILED BATS (CHIROPTERA: MOLOSSIDAE: TADARIDA BRASILIENSIS): A REVIEW","authors":"Brandi M. Christiano, M. Ryan","doi":"10.1894/0038-4909-67.2.158","DOIUrl":"https://doi.org/10.1894/0038-4909-67.2.158","url":null,"abstract":"","PeriodicalId":51157,"journal":{"name":"Southwestern Naturalist","volume":null,"pages":null},"PeriodicalIF":0.2,"publicationDate":"2022-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45096905","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-07-26DOI: 10.1894/0038-4909-67.2.143
J. L. Snekser, M. Itzkowitz
{"title":"AGGRESSIVE BEHAVIOR OF THE ENDANGERED LEON SPRINGS PUPFISH IS INEFFECTIVE AGAINST THE ENDANGERED EGG PREDATOR PECOS GAMBUSIA","authors":"J. L. Snekser, M. Itzkowitz","doi":"10.1894/0038-4909-67.2.143","DOIUrl":"https://doi.org/10.1894/0038-4909-67.2.143","url":null,"abstract":"","PeriodicalId":51157,"journal":{"name":"Southwestern Naturalist","volume":null,"pages":null},"PeriodicalIF":0.2,"publicationDate":"2022-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45105334","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-05-11DOI: 10.1894/0038-4909-66.1.77
Kinley Ragan, Ganesh Marin, Chelsey R. Tellez, R. Sierra‐Corona, J. Schipper
{"title":"CO-OCCURRENCE OF FOUR ENDANGERED MAMMALS IN THE MEXICO–UNITED STATES BORDERLANDS: JAGUAR (PANTHERA ONCA), OCELOT (LEOPARDUS PARDALIS), BEAVER (CASTOR CANADENSIS) AND BLACK BEAR (URSUS AMERICANUS)","authors":"Kinley Ragan, Ganesh Marin, Chelsey R. Tellez, R. Sierra‐Corona, J. Schipper","doi":"10.1894/0038-4909-66.1.77","DOIUrl":"https://doi.org/10.1894/0038-4909-66.1.77","url":null,"abstract":"","PeriodicalId":51157,"journal":{"name":"Southwestern Naturalist","volume":null,"pages":null},"PeriodicalIF":0.2,"publicationDate":"2022-05-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48430204","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-05-11DOI: 10.1894/0038-4909-66.1.84
T. Drezner
{"title":"POPULATION STRUCTURE RESPONSE AND LIFE-CYCLE COMPRESSION IN DIFFERENT ENVIRONMENTS IN A KEYSTONE SPECIES","authors":"T. Drezner","doi":"10.1894/0038-4909-66.1.84","DOIUrl":"https://doi.org/10.1894/0038-4909-66.1.84","url":null,"abstract":"","PeriodicalId":51157,"journal":{"name":"Southwestern Naturalist","volume":null,"pages":null},"PeriodicalIF":0.2,"publicationDate":"2022-05-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49098534","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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