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Rising utilization of stable isotopes in tree rings for climate change and forest ecology

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Journal of Forestry Research 2024年第1期35卷 103-116页

作者： Ru Huang Chenxi Xu jussi Grießinger Xiaoyu Feng Haifeng Zhu Achim Bräuning National Institute of Natural Hazards Beijing 100085People’s Republic of China Key Laboratory of Cenozoic Geology and Environment Institute of Geology and GeophysicsChinese Academy of SciencesBeijing 100029People’s Republic of China CAS Center for Excellence in Life and Paleoenvironment Beijing 100044People’s Republic of China Institute of Geography Friedrich-Alexander-University of Erlangen-Nuremberg91058 ErlangenGermany State Key Laboratory of Tibetan Plateau Earth System Environment and Resources(TPESER)Institute of Tibetan Plateau ResearchChinese Academy of SciencesBeijing 100101People’s Republic of China University of Chinese Academy of Sciences Beijing 100049People’s Republic of China

Analyses of stable isotopes(C,O,H)in tree rings are increasingly important cross-disciplinary *** rapid development in this field documented in an increasing number of publications requires a comprehensive *** study includes a bibliometric analysis-based review to better understand research trends in tree ring stable isotope ***,1475 publications were selected from the Web of Science Core Collection for *** findings are that:(1)numbers of annual publications and citations increased since *** 1974 to 1980,there were around two relevant publications per ***,from 2020 to 2022,this rose sharply to 109 publications per ***,average article citations were less than four per year before 1990,but were around four per article per year after 2000;(2)the major subjects using tree ring stable isotopes include forestry,geosciences,and environmental sciences,contributing to 42.5%of the total during 1974-2023;(3)the top three most productive institutions are the Chinese Academy of Sciences(423),the Swiss Federal Institute for Forest,Snow and Landscape Research(227),and the University of Arizona(204).These achievements result from strong collaborations;(4)review papers,for example,(Dawson et al.,Annu Rev Ecol Syst 33:507-559,2002)and(McCarroll and Loader,Quat Sci Rev 23:771-801,2004),are among the most cited,with more than 1000 citations;(5)tree ring stable isotope studies mainly focus on climatology and ecology,with atmospheric CO_(2) one of the most popular *** 2010,precipitation and drought have received increasing *** on this analysis,the research stages,key findings,debated issues,limitations and direc-tions for future research are *** study serves as an important attempt to understand the progress on the use of stable isotopes in tree rings,providing scientific guid-ance for young researchers in this field.

关键词： Tree rings Stable isotopes Web of Science Bibliometric

High-performance portable grating-based surface plasmon resonance sensor using a tunable laser at normal incidence

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Photonics Research 2024年第5期12卷 947-958页

作者： DUC LE ANNI RANTA-LASSILA TEEMU SIPOLA MIKKO KARPPINEN JARNO PETAJA MINNA KEHUSMAA SANNA AIKIO TIAN-LONG GUO MATTHIEU ROUSSEY jussi HILTUNEN ALEXEY POPOV VTT Technical Research Centre of Finland 90570 OuluFinland Department of Physics and Mathematics University of Eastern FinlandFI-80101 JoensuuFinland

Surface plasmon resonance(SPR)sensors are among the most sensitive *** such devices,a grating is a compelling alternative to a prism for the excitation of a surface plasmon,especially in the development of sensors for point-of-care applications due to their compactness and ***,we demonstrate the use of a tunable laser in a grating-based SPR system for further miniaturization and *** tunable laser working at normal incidence replaces spectral and moving components,while also simplifying the optical *** incidence is conventionally avoided due to the complexity of the control of degenerated SPR *** investigate,both computationally and experimentally,the splitting of the SPR modes at small nonzero incidences,which is lacking in previously reported *** optimizing the grating configuration,we were able to diminish the SPR mode splitting phenomenon when the excitation was feasible with the normal incidence *** fabricated sensor showed a high sensitivity of 1101.6 nm/***,the figure of merit of the sensor,defined as the ratio between the sensitivity and bandwidth of the SPR dip,was *** experimental results were consistent with the simulation *** also demonstrate its capability for detecting low concentrations of glucose and creatinine with the limit of detection of 14.2 and 19.1 mmol/L,respectively.

关键词： tunable splitting excitation

Sexual deception： Coevolution or inescapable exploitation？

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Current Zoology 2014年第1期60卷 52-61页

作者： jussi LEHTONEN Centre of Excellence in Biological Interactions Research School of Biology The Australian National University Canberra ACT 0200 Australia Division of Evolution Ecology and Genetics Research School of Biology The Australian National University Canberra ACT 0200 Australia School of Life Sciences University of KwaZulu-Natal Private Bag X01 Scottsville Pietermaritzburg 3209 South Africa

Sexual deception involves the mimicry of another species＇ sexual signals in order to exploit behavioural routines linked to those signals. Known sexually deceptive systems use visual, acoustic or olfactory mimicry to exploit insects for preda- tion, cleptoparasitism and pollination. It is predicted that where sexual deception inflicts a cost on the receiver, a coevolutionary arms race could result in the evolution of discriminating receivers and increasingly refined mimicry. We constructed a conceptual model to understand the importance of trade-offs in the coevolution of sexually deceptive mimic and receiver. Four components examined were： the cost of mimicry, the cost to receiver for being fooled, the density of mimics and the relative magnitude of a mimicry-independent component of fitness. The model predicts that the exploitation of non-discriminating receivers by accurate signal mimicry will evolve as an evolutionary stable strategy under a wide range of the parameter space explored. This is due to the difficulty in minimising the costs of being fooled without incurring the cost of falsely rejecting real mating opportunities. In the model, the evolution of deception is impeded when mimicry imposes substantial costs for both sides of the arms race. Olfac- tory signals that are potentially cheap to produce are therefore likely to be more vulnerable to exploitation than expensive visual ornaments

关键词： Sexual deception Coevolution Arms race Model Mimicry Imperfect mimicry

Identification of Pu and U isotopic composition and its applications in environmental and CBRN research

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Defence Technology（防务技术） 2021年第3期17卷 728-740页

作者： Susanna Salminen-Paatero Paula Vanninen jussi Paatero Department of Chemistry RadiochemistryP.O.Box 55FI-00014University of HelsinkiFinland VERIFIN-Finnish Institute for the Verification of the Chemical Weapons Convention Department of ChemistryP.O.Box 55FI-00014University of HelsinkiFinland Finnish Meteorological Institute Observation ServicesP.O.Box 503FI-00101HelsinkiFinland

This paper describes the most common presently used methods for detecting uranium and plutonium isotopes after their introduction to environment. Known isotope ratios of U and Pu in different nuclear events are important tool for characterizing the sources of nuclear material. Detection techniques both in field and in laboratory are presented, as well as different models that can be used for identifying the origin and age of the nuclear material. Identification of the source of nuclear material in environmental samples is needed for estimating the quality and quantity of the nuclear hazard. This information is essential in risk assessment and crisis management, in chemical, biological, radiological and nuclear(CBRN) research after e.g. a terrorist attack, in radioecology and environmental radioactivity research.

关键词： CBRN Nuclear contamination Plutonium isotope ratios Uranium isotope ratios Nuclear fingerprinting Nuclear particle

Cadmium in insects after ash fertilization

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Insect Science 2009年第1期16卷 93-98页

作者： Martin Lodenius jussi Josefsson Kari Heliovaara Esa Tulisalo Matti Nummelin Department of Biological and Environmental Sciences Department of Forest Ecology University of Helsinki Finland

Ash fertilization of forests returns nutrients to forest ecosystems and has a positive effect on soil pH, but it also may elevate Cd concentrations of forest biota. Cadmium concentrations of some forest insects （Formica ants, carabids and Coleopteran larvae from decaying wood） were investigated in southern Finland, where two plots were fertilized with wood ash, while two other plots represented unfertilized control plots. In ants, mean Cd concentration was 3.6 ± 1.4 mg/kg, with nest workers having significantly higher concentrations than workers trapped in pitfall traps. Concentrations at fertilized and unfertilized plots were similar. In carabid beetles, the average Cd concentration of Carabus glabratus was 0.44 ±0.36 mg/kg, with no significant difference between control plots and fertilized plots. In another carabid beetle, Pterostichus niger, mean Cd concentration was higher at fertilized plots compared to control plots. We conclude that the variation of Cd concentrations in the insects studied is more efficiently controlled by species-specific differences than fertilization history of the forest floor.

关键词： bioaccumulation cadmium Carabidae Coleoptera fertilization Formica,wood ash

Drug-coated balloon-only strategy for percutaneous coronary intervention of de novo left main coronary artery disease: the importance of proper lesion preparation

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Frontiers of Medicine 2023年第1期17卷 75-84页

作者： Sanna Uskela Antti Eranti jussi MKärkkäinen Tuomas TRissanen North Karelia Central Hospital-Heart Center Tikkamaentie 16 Joensuu 80210Finland Kuopio University Hospital Puijonlaaksontie 2 KuopioPohjois-Savo 70210Finland

This retrospective single-center registry study included all consecutive patients who underwent percutaneous coronary intervention (PCI) for a de novo left main coronary artery lesion using drug coated-balloon (DCB)-only strategy between August 2011 and December 2018. To best of our knowledge, no previous studies of DCB-only strategy of treating de novo left main coronary artery disease, exist. The primary endpoint was major adverse cardiovascular events (MACEs) including cardiac death, non-fatal myocardial infarction, and target lesion revascularization (TLR). The cohort was divided into two groups depending on weather the lesion preparation was done according to the international consensus group guidelines. Sixty-six patients (mean age 75±8.6, 72% male), 52% of whom had acute coronary syndrome, underwent left main PCI with the DCB-only strategy. No procedural mortality and no acute closures of the treated left main occurred. At 12 months, MACE and TLR occurred in 24% and 6% of the whole cohort, respectively. If the lesion preparation was done according to the guidelines, the MACE and TLR rates were 21.2% and 1.9%. Left main PCI with the DCB only-strategy is safe leading to acceptable MACE and low TLR rates at one year, if the lesion preparation is done according to the guidelines.

关键词： drug-coated balloon left main high bleeding risk predilatation calcifield lesion percutaneous coronary intervention

Indigenous Knowledge and Developing Countries’Innovation Systems:The Case of Namibia

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International Journal of Innovation Studies 2017年第1期1卷 89-106页

作者： jussi S.Jauhiainen Lauri Hooli Institute of Ecology and Earth Sciences University of Tartu50090 TartuEstonia Department of Geography and Geology University of TurkuTurku FI‐20014Finland

This article analyzes in‐depth the development trajectory of the innovation systems(IS)in the case of *** research data consists of documents,interviews and studies related to IS development in Namibia from the 1990s until early *** case study highlights the spatiotemporal challenges of creating an IS in a developing country with limited STI resources and the potential mismatch between related strategies and *** is a broad framework that identifies and maps potential relevant actors for innovation development but it does not necessary enhance interactions between the actors of *** developing countries,the doing‐using‐interacting mode of innovation fits better when the aim is to integrate indigenous knowledge(IK)into an *** IK‐included IS can facilitate participatory development processes,foster socioeconomic resilience of local communities and enhance the comparative advantage of a developing country.

关键词： Innovation systems Indigenous knowledge Developing countries Namibia Africa

The differences in carbon dynamics between boreal dwarf shrubs and Scots pine seedlings in a microcosm study

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Journal of Plant Ecology 2018年第5期11卷 709-716页

作者： Liisa Kulmala Maria del Rosario Dominguez Carrasco jussi Heinonsalo Department of Forest Sciences University of HelsinkiLatokartanonkaari 700014 HelsinkiFinland Department of Food and Environmental Sciences University of HelsinkiViikinkaari 900014 HelsinkiFinland

Aims The ground level of boreal pine forests consists of a dense layer of eri-caceous shrubs,herbs,grasses,mosses and *** primary prod-uctivity of this forest floor vegetation is notable but the role the most common ericoid dwarf shrub plant species,Calluna vulgaris,Vaccinium myrtillus and Vaccinium vitis-idaea,play in carbon(C)cycling in these ecosystems is poorly ***,we studied their C dynamics in detail using plants of similar size(age 14-19 months)in a microcosm *** We determined the full C balances of these dwarf shrubs for the first time and compared them to those of Pinus sylvestris by using long-term biomass accumulation,^(13)C pulse labelling and CO_(2) ex-change measurements in a controlled laboratory *** Findings Pinus sylvestris had significantly higher biomass-based C fluxes than dwarf shrubs,both aboveground and belowground,but the dwarf shrubs did not differ in the biomass-based *** showed that root respiration of the evergreen ericoid dwarf shrubs was sensitive to the aboveground light conditions as belowground respiration was 50-70%higher under light compared with dark *** light-related dif-ferences were not observed for Scots *** observed differences in C dynamics are important in estimating the origin of belowground CO_(2) fluxes and in evaluating their biological *** results improve current understanding of CO_(2) sources and sinks in boreal ecosystems.

关键词： photosynthesis autotrophic respiration NPP ^(13)C labelling

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校园城市村落芬兰埃斯波

世界建筑导报 2024年第2期39卷 104-105页

作者： Juho Grönholm Antti Nousjoki Janne Teräsvirta Samuli Woolston Willem Barendregt Vladimir Ilic Julius Kekoni Auvo Lindroos Aleksi Niemeläinen Pekka Sivula Pekka Tainio jussi Vuori Haley Zhou ErikaÖsterlund ALA建筑师事务所

ALA建筑师事务所在阿尔托大学的2015校园国际设计竞赛中提出了“大型联合建筑群——活动孵化器”的理念。他们的目标是连接现有的结构和项目,创建一个新的区域热点,一个充满街道生活气息的城市集中区,促进创造力的展示。

关键词：建筑师事务所国际设计竞赛孵化器创造力生活气息阿尔托大学校园集中区