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Evidence of Ultraviolet Fluorescence in Baird's Pocket Gopher (Geomys breviceps) 贝尔德袋鼠(Geomys breviceps)的紫外线荧光证据
Pub Date : 2024-06-11 DOI: 10.1660/062.127.0106
Angel Abbasi, McKaughly Wing, Justin D. Hoffman
Recent evidence suggests that ultraviolet fluorescence is more widespread among mammals than previously thought. For instance, the presence of fluorescence has been observed in both live and museum specimens of several species of pocket gophers (Family Geomyidae). We examined a live specimen of Baird's pocket gopher (Geomys breviceps) as well as museum specimens from four species of geomyids for evidence of ultraviolet fluorescence. Coverage and intensity of fluorescence was greatest in the live specimen. All museum specimens showed evidence of fluorescence although coverage and intensity decreased with specimen age. Additional research is needed to determine the source and ecological significance of ultraviolet fluorescence in pocket gophers.
最近的证据表明,紫外线荧光在哺乳动物中的分布比以前想象的更为广泛。例如,在几种袋鼠(地鼠科)的活体标本和博物馆标本中都观察到了荧光的存在。我们研究了贝尔德袋鼠(Geomys breviceps)的活体标本以及四种地鼠的博物馆标本,以寻找紫外线荧光的证据。活体标本的荧光覆盖范围和强度最大。虽然随着标本年龄的增长,荧光的覆盖范围和强度都有所下降,但所有的博物馆标本都显示出荧光的证据。要确定口袋地鼠紫外荧光的来源和生态意义,还需要进行更多的研究。
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引用次数: 0
A New Fossil Marine Vertebrate Assemblage from the Upper Cretaceous Fairport Chalk Member of the Carlile Shale in Russell County, Kansas, U.S.A. 美国堪萨斯州拉塞尔县卡莱尔页岩上白垩世费尔波特白垩统成员的新海洋脊椎动物化石组合
Pub Date : 2023-11-15 DOI: 10.1660/062.126.0101
Lizette Arroyo, K. Shimada
The Fairport Chalk (lower middle Turonian) of the Carlile Shale is an Upper Cretaceous rock unit that was deposited in the middle of the Western Interior Seaway. This study presents the results of the first examination of microscopic marine vertebrate fossils from a single basal horizon within the Fairport Chalk at a new locality in Russell County, Kansas. The paleofauna consists of at least 12 vertebrate taxa, including seven chondrichthyans and five osteichthyans. They include durophagous (Ptychodus) and macrophagous (Cardabiodon and Cretoxyrhina) species, opportunistic scavengers and feeders (Squalicorax), and pelagic predators (plethodids and Enchodus). There is a scarcity of Enchodus and an abundance of caturid teeth, which is similar to the upper half of the Greenhorn Limestone, but in striking contrast with the basal Greenhorn Limestone, upper Carlile Shale, and upper Niobrara Chalk. The abundance of caturid teeth in the Jetmore Chalk–Fairport Chalk interval indicates that the specific caturid taxon was more common in the offshore environment than E. shumardi.
卡里尔页岩中的费尔波特白垩系(中下统)是上白垩世的一个岩石单元,沉积于西内陆海道中部。本研究首次展示了堪萨斯州拉塞尔县一个新地点的费尔波特白垩系单一基底地层中的显微海洋脊椎动物化石的研究成果。古动物群由至少 12 个脊椎动物类群组成,包括 7 个软骨鱼类和 5 个骨鱼类。这些类群包括吞食类(Ptychodus)和大吞食类(Cardabiodon 和 Cretoxyrhina)、机会性食腐动物和食肉动物(Squalicorax)以及浮游掠食者(褶脚类和 Enchodus)。恩科多斯(Enchodus)牙齿稀少,而鲶科牙齿丰富,这与绿角灰岩上半部相似,但与绿角灰岩基底、卡莱尔页岩上部和尼奥布拉拉白垩系上部形成鲜明对比。杰特莫尔白垩系-机场白垩系间丰富的鲶鱼齿表明,与 E. shumardi 相比,特定的鲶鱼类群在近海环境中更为常见。
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引用次数: 0
Bur Oak Two-Part Inventions: Growth and Reproduction in Two Quercus macrocarpa Cohorts 橡树的两部分发明:两种柞树群的生长与繁殖
Pub Date : 2023-11-15 DOI: 10.1660/062.126.0102
Jon K. Piper
Bur oak (Quercus macrocarpa) was once a primary constituent of savannas throughout the Great Plains. Today, however, oak woodlands occupy only a small percentage of their former extent, and so efforts are underway to restore them. This study examined growth of young trees, frequency of acorn production (an index of recruitment potential), and seedling recruitment in two bur oak cohorts, planted in 2007 and 2009, in a mostly unmanaged setting undergoing old field succession. Documenting the variation in growth response is important for predicting rates of establishment and recruitment in woodland restorations where bur oaks are planted with little to no subsequent intervention. Trees grew an average 40.59 cm/year in the 2007 cohort, and 30.49 cm/year in the 2009 cohort. For both cohorts, height was a function of age (2007 cohort: r2 = 0.793; 2009 cohort: r2 = 0.616). In 2022, diameter at breast height (DBH) was a strong predictor of tree height (2007 cohort: r2 = 0.776; 2009 cohort: r2 = 0.927). There was great variation in fruit production among individual trees: annual acorn production varied from ∼1 to ∼45 % of trees in the 2007 cohort and from ∼4 to ∼24 % of trees in the 2009 cohort. In 2022, 81.25 % of randomized 4 m x 4 m quadrats contained bur oak seedlings. It is encouraging that acorn production commenced just a few years after planting and that substantial recruitment from seed began within ten years, suggesting that bur oak stands so established can become self-sustaining. These results can inform restoration ecologists who wish to reestablish native oak stands but may lack the time and resources to provide much follow-up.
麻栎(Quercus macrocarpa)曾经是整个大平原稀树草原的主要成分。但如今,橡树林地仅占其昔日面积的一小部分,因此人们正在努力恢复它们。这项研究考察了 2007 年和 2009 年种植的两批栎树幼树的生长情况、橡子的生产频率(繁殖潜力指数)以及幼苗的繁殖情况。记录生长反应的变化对于预测林地恢复过程中的建群率和更新率非常重要,因为在林地恢复过程中种植的毛橡树几乎没有后续干预。2007 年种植的树木平均每年生长 40.59 厘米,2009 年种植的树木平均每年生长 30.49 厘米。这两批树木的高度都与树龄有关(2007 年:r2 = 0.793;2009 年:r2 = 0.616)。2022 年,胸径(DBH)对树高有很强的预测作用(2007 年组群:r2 = 0.776;2009 年组群:r2 = 0.927)。单株树木的果实产量差异很大:2007 年组群中,年产橡子的树木比例从 1 ∼ 45% 不等,2009 年组群中,年产橡子的树木比例从 4 ∼ 24% 不等。2022 年,81.25% 的 4 米 x 4 米随机四分区中都有栎树幼苗。令人鼓舞的是,橡子的生产在种植后短短几年内就开始了,种子的大量繁殖在十年内就开始了,这表明这样建立起来的栎树林可以自我维持。这些结果可以为那些希望重建本地橡树林,但可能缺乏时间和资源进行大量后续工作的恢复生态学家提供参考。
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引用次数: 0
A Population Study of Alfalfa Weevil (Coleoptera: Curculionidae) in Kansas 堪萨斯州紫花苜蓿象鼻虫(鞘翅目:卷须科)种群研究
Pub Date : 2023-11-15 DOI: 10.1660/062.126.0110
Joanna C. Gress, Jade Horn, Nathaniel Skinner
The alfalfa weevil, Hypera postica (Gyllenhal) is one of the most damaging pests of alfalfa in Kansas causing crop loss of 10-15% annually. No formal population study has been conducted. The strain distribution of H. postica in Kansas was determined for eight fields located in six major alfalfa growing counties. mDNA from individuals collected at each field location was digested and sequenced to differentiate among strains. Eastern, western and Egyptian strains were recovered with eastern being the dominant strain. All sites examined had populations of eastern and western strains within the same fields. This study is the first reported instance of the Egyptian strain in Kansas. This intergrade of weevil strains may have significant implications for Integrated Pest Management strategies.
苜蓿象鼻虫 Hypera postica (Gyllenhal) 是堪萨斯州危害苜蓿最严重的害虫之一,每年造成 10-15% 的作物损失。目前还没有进行过正式的种群研究。我们对堪萨斯州六个主要紫花苜蓿种植县的八块田地进行了研究,确定了 H. postica 的菌株分布。发现了东部、西部和埃及菌株,其中东部菌株为优势菌株。所有考察点的同一块田里都有东部和西部菌株的种群。这项研究是堪萨斯州首次报道埃及菌株。这种象鼻虫品系的相互分化可能会对虫害综合防治战略产生重大影响。
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引用次数: 0
The 155th Annual Meeting of the Kansas Academy of Science McPherson College, McPherson, KS, April 14-15, 2023 第155届堪萨斯科学院麦克弗森学院年会,堪萨斯麦克弗森,2023年4月14日至15日
Pub Date : 2023-11-15 DOI: 10.1660/062.126.0117
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引用次数: 0
Photo Essay: Observations on the Survival of An Injured Great White Egret (Ardea alba) at High Park, Derby, Kansas 摄影论文:观察堪萨斯州德比高地公园一只受伤大白鹭(Ardea alba)的生存状况
Pub Date : 2023-11-15 DOI: 10.1660/062.126.0109
M. Everhart
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引用次数: 0
Increasing Detection Sensitivity for Rare and Endangered Species in Kansas through Development of An Aquatic Environmental DNA Sampling Protocol 通过制定水生环境 DNA 采样协议提高堪萨斯州珍稀濒危物种的检测灵敏度
Pub Date : 2023-11-15 DOI: 10.1660/062.126.0115
Sara Hallyburton, William Stark
Anthropogenic global climate change is contributing to the mass extinction of wildlife across the globe. The protection of biodiversity in freshwater environments ensures economically beneficial ecosystem services are maintained. Freshwater ecosystems are hotspots for biodiversity and have higher levels of imperiled organisms compared to terrestrial and marine systems. The objective of this study was to develop an aquatic environmental DNA (eDNA) protocol that increases detection sensitivity to target rare and endangered aquatic organisms in Kansas. The Cylindrical Papershell mussel (Anodontoides ferussacianus) was listed as endangered in Kansas in 2019 and was used for protocol development due to its contracting distribution and low population density. While this species was used in the development of the protocol, the objective of this protocol is not restricted to this species. Following this protocol, Cylindrical Papershell DNA was detected at a sensitivity of 1.7 parts per billion in 1 L of water. Increasing detection sensitivity will be necessary for successful conservation strategies as we proceed through the Anthropocene due to compounding costs associated with monitoring and managing an increasing number of declining populations. This protocol, in conjunction with traditional sampling efforts, will aid in future monitoring and recovery plans of native aquatic species.
人为的全球气候变化正在导致全球野生动物的大规模灭绝。保护淡水环境中的生物多样性可确保维持具有经济效益的生态系统服务。淡水生态系统是生物多样性的热点地区,与陆地和海洋系统相比,淡水生态系统中濒临灭绝的生物数量更多。本研究的目的是开发一种水生环境 DNA(eDNA)协议,提高检测灵敏度,以堪萨斯州的稀有和濒危水生生物为目标。圆筒纸壳贻贝(Anodontoides ferussacianus)于 2019 年被列为堪萨斯州的濒危物种,由于其分布范围收缩且种群密度较低,因此被用于制定方案。虽然该物种被用于制定规程,但本规程的目标并不局限于该物种。根据该方案,在 1 升水中检测到圆柱形纸壳 DNA 的灵敏度为十亿分之 1.7。由于监测和管理数量日益减少的种群所需的成本不断增加,因此在人类世的过程中,提高检测灵敏度是成功实施保护战略的必要条件。该方案与传统的取样工作相结合,将有助于未来本地水生物种的监测和恢复计划。
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引用次数: 0
Book Review: For Want of Wings – A Bird with Teeth and a Dinosaur in the Family 书评为了翅膀--家里有一只长牙的鸟和一只恐龙
Pub Date : 2023-11-15 DOI: 10.1660/062.126.0112
M. Everhart
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引用次数: 0
Bison (Bison bison) dung Decays Slowly but Can Still be Used to Track Short- and Long-Term Habitat Usage 野牛(Bison bison)粪便腐烂缓慢,但仍可用于追踪短期和长期栖息地使用情况
Pub Date : 2023-11-15 DOI: 10.1660/062.126.0114
Brynn Noble, Zak Ratajczak
Dung counts can be a cheap and effective way to estimate herbivore density across grassland and savanna ecosystems. However, estimating animal density requires information on the decay rate of dung and the animal's defecation rate. Before the arrival of Europeans, the American Bison (Bison bison) was one of the most widespread megafauna in North America. Yet, we are unaware of any study that has quantified the fundamental measurements of dung decay and deposition rates in bison. This study aimed to determine the dung decay rate and defecation rate of bison to estimate population size and habitat usage. The decay rate of bison dung was tracked by revisiting cohorts of dung piles throughout the year for an average of 184 days using a five-class classification system to track the decay process. Only 23 of our 78 dung piles fully decayed within the 168 to 211 days of tracking, with an average of 101 days for decay, which is substantially slower than similar megafauna, such as cattle and cape buffalo. However, using a decay class system instead of full decay is useful in tracking bison habitat usage because dung transitions to class 4 over a consistent 25 to 30 days. Based on video recordings in autumn, the average defecation rate of bison was calculated to be approximately 10.7 dung piles per animal per day. These results can be used to track bison habitat usage in grassland ecosystems, with especially high accuracy of usage in the last 30 days.
粪便计数是估算草地和稀树草原生态系统中食草动物密度的一种廉价而有效的方法。然而,估算动物密度需要了解粪便的腐烂率和动物的排便率。在欧洲人到来之前,美洲野牛(Bison bison)是北美分布最广的巨型动物之一。然而,我们并不知道有任何研究对野牛粪便腐烂和沉积率的基本测量进行了量化。本研究旨在确定野牛的粪便腐烂率和排泄率,以估计野牛的种群数量和栖息地使用情况。通过对全年平均 184 天的同批粪堆进行重访,使用五级分类系统跟踪野牛粪便的腐烂过程,从而跟踪野牛粪便的腐烂率。在我们的 78 个粪堆中,只有 23 个在 168 到 211 天的跟踪期内完全腐烂,平均腐烂时间为 101 天,这比牛和水牛等类似巨型动物的腐烂速度要慢得多。不过,使用腐烂等级系统而不是完全腐烂系统有助于跟踪野牛对栖息地的使用情况,因为粪便在25到30天内稳定地过渡到4级。根据秋季的视频记录,计算出野牛的平均排便率约为每头野牛每天 10.7 个粪堆。这些结果可用于追踪野牛在草原生态系统中的栖息地使用情况,尤其是最后 30 天的使用情况,准确率非常高。
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引用次数: 0
A Quantum Mechanical Description of Photosensitization in Photodynamic Therapy Using a Two-Electron Molecule Approximation 用双电子分子近似描述光动力治疗中光敏作用的量子力学描述
Pub Date : 2023-11-15 DOI: 10.1660/062.126.0104
Vincent M Rossi
A fundamental, Quantum Mechanical description of photoactivation of a generic photosensitizer (PS) and the ensuing transfer of energy to endogenous oxygen as part of the Type II pathway to photodamage during photodynamic therapy (PDT) is presented. The PS and molecular oxygen are approximated as two-electron molecules. Conservation of energy and of angular momenta of the two molecule system are abided via selection rules throughout the four-stage process, including initial states, absorption of a photon by the PS, conversion of the PS to an excited spin triplet via intersystem crossing (ISC), and the transition of molecular oxygen to an excited spin singlet state via a Triplet-Triplet Exchange of electrons with the PS. The provided description of photosensitization will provide students and researchers with a fundamental introduction to PDT, while offering the broader population of Quantum Mechanics and Physical Chemistry students an advanced example of quantum systems in an applied, medical context.
本文介绍了一种通用光敏剂(PS)的光激活和随后将能量传递给内源性氧的基本量子力学描述,这是光动力治疗(PDT)期间光损伤的II型途径的一部分。PS和氧分子近似为双电子分子。两个分子系统的能量守恒和角动量守恒通过选择规则在整个四阶段过程中得到遵守,包括初始态、光子被PS吸收、PS通过系统间交叉(ISC)转化为受激自旋三重态、以及通过与PS的三重电子交换将分子氧转变为激发态自旋单重态。所提供的光敏化描述将为学生和研究人员提供PDT的基本介绍,同时为量子力学和物理化学学生提供更广泛的量子系统在应用医学背景下的高级示例。
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引用次数: 0
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Transactions of the Kansas Academy of Science
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