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Urine volume reduction during long-duration cave exploration by a light-weight and portable forward osmosis system 轻便便携式正渗透系统在长时间洞穴探测中减少尿量
IF 1.3 4区 地球科学 Q3 GEOSCIENCES, MULTIDISCIPLINARY Pub Date : 2020-09-01 DOI: 10.5038/1827-806x.49.3.2336
S. Engelhardt, Katey Bender, Jörg Vogel, Stephen E. Duirk, F. Moore, H. Barton, A Aquaporin
The preservation of caves is a challenge during long-duration cave expeditions where human waste can add significant nitrogen to the cave ecosystem. Since the removal of urine that accumulates during a multi-day caving trip is not always feasible due to weight and volume constraints, a light-weight and portable filtration system that is capable of reducing urine volume would be desirable. In this study we tested the Aquaporin Inside hollow fiber membrane in a forward osmosis (FO) setup to evaluate its capability to reduce urine volume while rejecting nitrogenous compounds using different draw solution chemistries and water recovery rates. As a result, we introduce a light-weight and portable FO prototype that was able to reduce urine volume by over 80%. Although total nitrogen (TN) rejection in this process did not exceed 70%, allowing some nitrogen to move across the membrane into the draw solution, evaporation allowed draw solution recycling without loss of nitrogenous compounds into the atmosphere. These data suggest that FO may be a suitable strategy to reduce urine volume and improve methods for nitrogenous waste handling during long-term cave exploration.
在长期的洞穴探险中,洞穴的保护是一个挑战,因为人类排泄物会给洞穴生态系统增加大量的氮。由于重量和体积的限制,去除在多日开采过程中积聚的尿液并不总是可行的,因此需要一种能够减少尿液体积的轻便便携式过滤系统。在这项研究中,我们在正渗透(FO)装置中测试了Aquaporin Inside中空纤维膜,以评估其在使用不同的提取溶液化学成分和水回收率来抑制含氮化合物的同时减少尿量的能力。因此,我们推出了一种重量轻、便携的FO原型,能够将尿量减少80%以上。尽管该过程中的总氮(TN)截留率不超过70%,允许一些氮穿过膜进入提取溶液,但蒸发允许提取溶液再循环,而不会将含氮化合物损失到大气中。这些数据表明,在长期洞穴勘探过程中,FO可能是减少尿量和改进含氮废物处理方法的合适策略。
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引用次数: 3
Stygobitic crustaceans in an anchialine cave with an archeological heritage at Vodeni Rat (Island of Sveti Klement, Hvar, Croatia) Vodeni Rat(克罗地亚赫瓦尔省Sveti Klement岛)具有考古遗产的洞穴中的蛤壳类动物
IF 1.3 4区 地球科学 Q3 GEOSCIENCES, MULTIDISCIPLINARY Pub Date : 2020-09-01 DOI: 10.5038/1827-806x.50.1.2342
A. Montanari, Osservatorio Geologico di Coldigioco, Nicolas Cerveau, B. Fiasca, Jean‐François Flot, D. Galassi, M. Mainiero, D. McGee, T. Namiotko, Stefano Recanatini, F. Stoch, Studio Geologico, Gruppo Speleologico Marchigiano
A group of four amphoras found in the anchialine cave of Vodeni Rat in the Croatian island of Sveti Klement, on a rocky ledge at 24 m water depth, indicates that a freshwater source was exploited at the bottom of this karstic pit by islanders and/or passing-by sailors from the late Roman Republican Period to the Early Medieval Period. In other words, prior to the 4th–7th century CE, Vodeni Rat was not an anchialine cave but a Pleistocene karstic pit with a freshwater pool at the bottom. Seawater started to infiltrate this cavity via newly opened fissures in the surrounding limestone after the 4th–7th century CE, as the archeometric age of the youngest intact amphora found down in the pit suggests. At present, the 29-m-deep water body is stratified, with a saline water layer at the bottom, a freshwater layer at the surface, and a transitional brackish water layer in the middle. Our study of the physical and biological characteristics of the cave water column revealed diversified and highly partitioned populations of stygobitic crustaceans including ostracods, copepods, amphipods, and thermosbaenaceans. Some species known to be exclusively endemic of highly saline habitats were collected from the bottom saline layer, whereas others known to be of freshwater origin were found in the upper water layer. This suggests that the freshwater dwellers were already present in this cave prior to the early medieval event that caused seepage of seawater into this karstic pit.
在克罗地亚Sveti Klement岛Vodeni Rat的anchialine洞穴中发现的一组四个双耳罐,位于水深24米的岩石突出处,表明从罗马共和时期晚期到中世纪早期,岛民和/或路过的水手在这个水坑底部开采了淡水资源。换句话说,在公元4世纪至7世纪之前,Vodeni Rat并不是一个洞穴,而是一个更新世的岩溶坑,底部有一个淡水池。根据在坑中发现的最年轻的完整双耳罐的考古年龄,公元4 - 7世纪之后,海水开始通过周围石灰岩中新打开的裂缝渗入这个洞穴。目前,29 m深水体呈层状,底层为咸水层,表层为淡水层,中间为过渡性微咸水层。通过对岩洞水柱物理生物学特征的研究,揭示了岩洞水柱中介形类、桡足类、片足类和温生纲等甲壳类动物的多样性和高度分区性。一些已知只在高盐生境中特有的物种是从底层盐层中收集的,而其他已知的淡水来源的物种则是在上层水层中发现的。这表明,在中世纪早期导致海水渗入这个岩溶坑的事件发生之前,淡水居民就已经在这个洞穴里了。
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引用次数: 1
Influence of some climatic elements on radon concentration in Saeva Dupka Cave, Bulgaria 保加利亚Saeva Dupka洞穴某些气候因素对氡浓度的影响
IF 1.3 4区 地球科学 Q3 GEOSCIENCES, MULTIDISCIPLINARY Pub Date : 2020-09-01 DOI: 10.5038/1827-806x.49.3.2349
Peter Nojarov, P. Stefanov, K. Turek
*pnojarov@abv.bg Citation:
* pnojarov@abv.bg引用:
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引用次数: 2
Stratigraphical influence on chalk cave development in Upper Normandy, France: implications for chalk hydrogeology 地层对法国上诺曼底白垩溶洞发育的影响:对白垩水文地质的启示
IF 1.3 4区 地球科学 Q3 GEOSCIENCES, MULTIDISCIPLINARY Pub Date : 2020-09-01 DOI: 10.5038/1827-806x.49.3.2319
D. Ballesteros, A. Farrant, C. Nehme, M. Woods, D. Todisco, D. Mouralis
Classically, the Upper Cretaceous Chalk Group aquifer of northwest Europe is conceptualized as a homogenous dual-porosity aquifer, with high porosity related to its fine-grained porous matrix, and intermediate hydraulic conductivity associated with fractures. However, an increasing number of hydrological studies visualize the Chalk as a heterogeneous karst aquifer due to the localised presence of dissolutionally enlarged conduits. Field investigation suggests that cave development is guided by distinct stratigraphical and tectonic discontinuities within the rock mass. Identifying which potential inception horizons within the Chalk aquifer are favoured, and why, is important for developing future robust conceptual models of groundwater behaviour. This study focusses on the Chalk of the Upper Normandy region in France where karstic conduits are common and are linked to major sources of groundwater for public water supply. We analyse the geometry and geomorphology of six chalk caves exposed in the Seine Valley with an aggregated length of over 5.7 km, along with other caves in southern England, and identify the key inception horizons associated with their development. The data shows that prominent Turonian, Coniacian and Santonian hardgrounds have influenced the development of 68% of the studied caves length, with sheet-flints and marl seams also playing a prominent role. Caves developed on or between hardgrounds typically display a complex interlinked anastomotic passage network, whereas passages subjected to paragenetic conditions caused by a high sediment flux tend to be concentrated into fewer, larger conduits. The new evidence from Normandy and Southern England demonstrates the role of lithostratigraphy, and in particular stratigraphical discontinuities on conduit development. The data reinforces the idea that the Chalk aquifer should be viewed as a heterogeneous triple porosity karstic aquifer, in which conduit development is influenced by key stratigraphical discontinuities. This improved conceptual model can be used to develop better groundwater flow models and improved catchment delineation.
从传统意义上讲,西北欧的上白垩纪白垩系白垩系含水层被概念化为均质双重孔隙含水层,其高孔隙度与其细粒多孔基质有关,中等导水率与裂缝有关。然而,越来越多的水文研究将Chalk视为非均质岩溶含水层,因为局部存在溶解性增大的管道。现场调查表明,洞穴的发育受岩体内不同的地层和构造不连续性的指导。确定Chalk含水层内哪些潜在的起始层位是有利的,以及为什么,对于开发未来可靠的地下水行为概念模型很重要。这项研究的重点是法国上诺曼底地区的白垩岩,那里的岩溶管道很常见,并与公共供水的主要地下水来源相连。我们分析了塞纳河流域六个白垩洞穴的几何形状和地貌,这些洞穴的总长度超过5.7公里,以及英格兰南部的其他洞穴,并确定了与它们的发展相关的关键起始层位。数据显示,突出的Turonian、Coniacian和Santonian硬地影响了68%研究洞穴长度的发育,片状燧石和泥灰岩矿层也发挥了重要作用。硬地上或硬地之间发育的洞穴通常显示出复杂的相互连接的吻合通道网络,而受高沉积物通量引起的共生条件影响的通道往往集中在更少、更大的管道中。来自诺曼底和英格兰南部的新证据证明了岩石地层学,特别是地层不连续性对导管发育的作用。该数据强化了Chalk含水层应被视为非均质三孔岩溶含水层的观点,其中管道的发育受到关键地层不连续性的影响。这种改进的概念模型可用于开发更好的地下水流动模型和改进的集水区划定。
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引用次数: 2
Speleothems in quartz-sandstone caves of Ponta Grossa municipality, Campos Gerais region, Paraná state, southern Brazil 巴西南部帕拉纳<e:1>州坎波斯吉拉斯地区蓬塔格罗萨市石英砂岩洞穴中的洞穴
IF 1.3 4区 地球科学 Q3 GEOSCIENCES, MULTIDISCIPLINARY Pub Date : 2020-05-01 DOI: 10.5038/1827-806x.49.2.2313
H. Pontes, L. A. Fernandes, M. S. D. Melo, G. Guimarães, Laís Luana Massuqueto
The present communication characterizes and discusses the genesis of cave speleothems developed in Furnas Formation (Silurian-Devonian) and Vila Velha sub-unit (Campo Mourão Formation, Upper Carboniferous) quartz-sandstones, in southern Brazil. The research, which involved stratigraphic and petrographic studies, was conducted to identify the faciological context of occurrence of these features, and to determine, through different analytical methods, their mineralogical composition and porosity, and also the action of microbial markers on the genesis of these secondary mineral deposits. The speleothems were classified into six types based on form, composition and genesis: (1) arborescent (coral), (2) mushroom-shaped, (3) stalactitic, (4) stalagmitic, (5) columnar with horizontal/ascending growth, and (6) fibrous. In response to substrate permoporosity, speleothems develop on all sandstone facies of the study area, mainly in sites controlled by bedding, stratification and fracturing planes. They are less frequent, however, in conglomerate and silty-clayey layers of the Furnas Formation, being composed mainly of silica (opal-A and cryptocrystalline silica) and kaolinite, with lesser contribution of gypsum and amorphous iron oxides associated with goethite and hematite. Detritic minerals such as quartz and muscovite also take part in the composition of these features. Plant and invertebrate fragments were identified, including biosignatures and microorganisms capable of favoring precipitation of silica (possibly cyanobacteria and diatom) and iron oxide (possibly Gallionella ferruginea). Such biosignatures and extracellular polymeric substances (biofilms) associated with speleothems are evidence of organomineralization, also known as biologically induced mineralization. The results, which indicate biological action on the genesis of speleothems, raise further discussion on the influence of microorganisms on the dissolution and precipitation of silica and kaolinite in the region.
巴西南部志留纪-泥盆纪furas组和上石炭统Campo mour组Vila Velha亚单元石英砂岩中发育的洞穴洞穴特征及其成因的交流。这项研究包括地层学和岩石学研究,旨在确定这些特征发生的地质背景,并通过不同的分析方法确定它们的矿物组成和孔隙度,以及微生物标志物对这些次生矿床成因的作用。根据其形态、组成和成因,将其划分为6种类型:(1)树状(珊瑚状)、(2)蘑菇状、(3)钟乳状、(4)石笋状、(5)水平/上升生长的柱状、(6)纤维状。研究区各砂岩相均发育洞室,主要发育在受层理、层理和压裂面控制的位置。然而,它们在弗纳斯组的砾岩和粉质粘土层中较少出现,主要由二氧化硅(蛋白石- a和隐晶二氧化硅)和高岭石组成,与针铁矿和赤铁矿相关的石膏和无定形氧化铁的贡献较少。碎屑矿物如石英和白云母也参与了这些特征的组成。鉴定了植物和无脊椎动物的碎片,包括生物特征和能够有利于沉淀二氧化硅(可能是蓝藻和硅藻)和氧化铁(可能是铁Gallionella ferruginea)的微生物。这些生物特征和与洞穴相关的细胞外聚合物质(生物膜)是有机矿化的证据,也称为生物诱导矿化。这些结果表明,微生物对洞穴石的成因有生物作用,并进一步探讨了微生物对该地区二氧化硅和高岭石溶解和沉淀的影响。
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引用次数: 3
Did you wash your caving suit? Cavers’ role in the potential spread of Pseudogymnoascus destructans, the causative agent of White-Nose Disease 你洗了你的潜水衣吗?洞穴在白鼻病病原体——破坏性假裸子霉潜在传播中的作用
IF 1.3 4区 地球科学 Q3 GEOSCIENCES, MULTIDISCIPLINARY Pub Date : 2020-05-01 DOI: 10.5038/1827-806x.49.2.2326
Violeta Zhelyazkova, A. Hubancheva, G. Radoslavov, Nia Toshkova, S. Puechmaille
*sebastien.puechmaille@umontpellier.fr Citation:
* sebastien.puechmaille@umontpellier.fr引用:
{"title":"Did you wash your caving suit? Cavers’ role in the potential spread of Pseudogymnoascus destructans, the causative agent of White-Nose Disease","authors":"Violeta Zhelyazkova, A. Hubancheva, G. Radoslavov, Nia Toshkova, S. Puechmaille","doi":"10.5038/1827-806x.49.2.2326","DOIUrl":"https://doi.org/10.5038/1827-806x.49.2.2326","url":null,"abstract":"*sebastien.puechmaille@umontpellier.fr Citation:","PeriodicalId":56286,"journal":{"name":"International Journal of Speleology","volume":"49 1","pages":"149-159"},"PeriodicalIF":1.3,"publicationDate":"2020-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47532164","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 12
The role of microhabitats in structuring cave invertebrate communities in Guatemala 微生境在危地马拉洞穴无脊椎动物群落结构中的作用
IF 1.3 4区 地球科学 Q3 GEOSCIENCES, MULTIDISCIPLINARY Pub Date : 2020-05-01 DOI: 10.5038/1827-806x.49.2.2333
G. Pacheco, M. Silva, E. Cano, R. Ferreira
*gabrielle.pacheco@hotmail.com Citation:
*gabrielle.pacheco@hotmail.com引文:
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引用次数: 6
Safe and effective disinfection of show cave infrastructure in a time of COVID-19 新冠肺炎疫情下展区基础设施的安全有效消毒
IF 1.3 4区 地球科学 Q3 GEOSCIENCES, MULTIDISCIPLINARY Pub Date : 2020-05-01 DOI: 10.5038/1827-806x.49.2.2332
H. Barton
The COVID-19 pandemic, caused by the novel coronavirus SARS-CoV-2, has been responsible for over 650,000 deaths worldwide. Transmission of SARS-CoV-2 occurs primarily through airborne transmission or direct human contact, demonstrating the importance of social distancing measures and the use of face masks to prevent infection. Nonetheless, the persistence of coronavirus on surfaces means that disinfection is important to limit the possibility of contact transmission. In this paper, the potential for various surfaces in show caves to serve as sources for SARS-CoV-2 infection is examined. Given the isoelectric potential (pI) of SARS and SARS-like coronaviruses, it is likely that they are adsorbed via electrochemical interactions to (limestone) rock surfaces, where the high humidity, pH and presence of biocarbonate ions will quickly lead to inactivation. Nonetheless, show caves contain infrastructure made of other non-porous surfaces that are more permissive for maintaining coronavirus viability. The 423 antiviral products approved by the US Environmental Protection Agency (EPA) were curated into 23 antiviral chemistries, which were further classified based on their potential to be hazardous, impact cave features or ecosystems, and those compounds likely to have the minimum impact on caves. The results suggest that alcohols (70% ethanol), organic acids (citric and lactic acid) and dilute hypochlorite represent the best disinfectants for in-cave use on non-porous surfaces. These disinfectants are able to inactivate coronaviruses inecosystems.
由新型冠状病毒SARS-CoV-2引起的COVID-19大流行已导致全球65万多人死亡。SARS-CoV-2的传播主要是通过空气传播或直接人际接触,这表明了保持社交距离措施和使用口罩预防感染的重要性。尽管如此,冠状病毒在物体表面的持续存在意味着消毒对于限制接触传播的可能性非常重要。在本文中,研究了洞穴中各种表面作为SARS-CoV-2感染源的可能性。考虑到SARS和类SARS冠状病毒的等电势(pI),它们很可能通过电化学相互作用吸附到(石灰石)岩石表面,那里的高湿度、pH值和生物碳酸盐离子的存在将迅速导致失活。尽管如此,洞穴中包含由其他无孔表面构成的基础设施,这些表面更有利于维持冠状病毒的生存能力。美国环境保护署(EPA)批准的423种抗病毒产品被整理成23种抗病毒化学物质,并根据其潜在的危险性、对洞穴特征或生态系统的影响以及对洞穴影响最小的化合物进行进一步分类。结果表明,酒精(70%乙醇)、有机酸(柠檬酸和乳酸)和稀次氯酸盐是洞穴内非多孔表面消毒的最佳消毒剂。这些消毒剂能够灭活生态系统中的冠状病毒。
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引用次数: 4
An Epigravettian hypogeal site in the Grotta del Fiume Cave at Frasassi (northeastern Apennines, Italy): Environmental and geochronologic assessments Frasassi(意大利亚平宁东北部)Grotta del Fiume洞穴中的Epigravettian地下遗址:环境和地质年代评估
IF 1.3 4区 地球科学 Q3 GEOSCIENCES, MULTIDISCIPLINARY Pub Date : 2020-05-01 DOI: 10.5038/1827-806x.49.2.2324
A. Montanari, Osservatorio Geologico di Coldigioco, A. Adamek, A. Curatolo, M. Ferretti, M. Mainiero, S. Mariani, D. McGee, Gaia Pignocchi, Stefano Recanatini, Studio Geologico, Gruppo Speleologico Cai Fabriano, Archeologist, Gruppo Speleologico Marchigiano
*sandro.coldigioco@gmail.com Citation:
* sandro.coldigioco@gmail.com引用:
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引用次数: 2
Anchialine biodiversity in the Turks and Caicos Islands: New discoveries and current faunal composition 特克斯和凯科斯群岛的昆虫生物多样性:新发现和当前的动物组成
IF 1.3 4区 地球科学 Q3 GEOSCIENCES, MULTIDISCIPLINARY Pub Date : 2020-05-01 DOI: 10.5038/1827-806x.49.2.2316
Brett C. Gonzalez, Alejandro Martínez, J. Olesen, S. Truskey, Lauren Ballou, Marc C. Allentoft-Larsen, Joost Daniels, Paul Heinerth, M. Parrish, Naqqi Manco, J. Ward, T. Iliffe, Karen J. Osborn, K. Worsaae, Hudson Florida Professional Technical Diver, Grand Turk Coastal Resources, Grace Bay Road Grace Bay Turks Dive Provo, Caicos Islands
Lying at the southernmost point of the Lucayan Archipelago, the Turks and Caicos Islands are amongst the better studied localities for anchialine cave biodiversity. For nearly five decades, novel invertebrate fauna, comprised primarily of crustaceans, have been collected from these tidally influenced pools – but new findings are always on the horizon. Herein we present new records of crustaceans and annelids from anchialine blue holes and horizontal caves of the Turks and Caicos. These findings include two potentially new species of meiofaunal annelids and a new species of remipede collected from a shallow water cave pool. Our 2019 expedition additionally expands known faunal distributions for several taxa across the Caicos islands, and raises the biodiversity of the region to 35 species, 13 of them considered endemic. This is the first comprehensive faunal list for the anchialine systems in the Caicos Bank.
特克斯和凯科斯群岛位于卢卡亚群岛的最南端,是对动物洞穴生物多样性研究得最好的地方之一。近五十年来,人们从这些受潮汐影响的池塘中收集了主要由甲壳类动物组成的新型无脊椎动物,但新的发现总是在地平线上。本文介绍了在特克斯和凯科斯群岛的蓝洞和水平洞穴中发现的甲壳类和环节动物的新记录。这些发现包括从一个浅水洞穴池中收集的两种可能是新物种的小动物环节动物和一种新的重足类动物。我们2019年的考察还扩大了凯科斯群岛上几个分类群的已知动物分布,并将该地区的生物多样性提高到35种,其中13种被认为是地方性的。这是凯科斯群岛第一个全面的动物系统名单。
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引用次数: 7
期刊
International Journal of Speleology
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