to OIS 3, compared to the more stable OIS 2 andOIS 1. Trends of dramatic warming through glacial-interglacialboundaries are followed by ageneral trend of decreasing temperatures towardsthe end of interglacial stages. This implies thatcolder episodes could also develop in the nearfuture of the Holocene at a sub-Milankovitchtime scale, after the end of the recent warmingphase. The oxygen and carbon isotopic signal ofthe sub-polar species N. pachyderma dextral,Turborotalita quinqueloba and Globigerina bulloides,from deglacial, interglacial and interstadialsediments, were analyzed for comparisonwith the signal of N. pachyderma sinistral. Ourinvestigation shows that the low relative abundanceof the polar morphotype of N. pachydermain sediments from warmer climates can yieldan isotopic signal that does not correspond to theprevailing climatic conditions of the area at thetime slice studied, probably for not being themost representative species of the sample. Thisfact is further supported by the older AMS 14Cage of N. pachyderma, compared to the ages ofthe sub-polar species from the same level. Thesignals of the three sub-polar species, on theother hand, show a more coherent trend in theintervals investigated and may reflect better theactual environmental conditions. Warm climaticepisodes within Oxygen Isotope Stage 6, indicatedby the high relative abundance of subpolarspecies, were not apparent in the oxygenisotope record of N. pachyderma sinistral, whilethe lower values of the isotopic records of thesub-polar species accurately reflect these warmerintervals.2008040231西 西 里 岛 西 北 三 叠 系 Lercara 组 中 发 现 的 早二 叠 世 Artinskian 最 早 期 再 沉 积 的 蜓 类 =Earliest Artinskian (early Permian)fusulinidsreworked in the Triassic Lercara formation (NWSicily). ( 英 文 ). Vachard D; Martini R. Journalof Foraminiferal Research, 2001, 31(1): 33-47 5图 版 .The Permian limestone boulders reworked inthe Triassic Lercara Formation (NW Sicily) containcarbonate microfossils consisting of algae,smaller foraminifers and fusulinids. The followingfusulinids are described: Quasifusulina ultimaKanmera, Robustoschwagerina cf. R. schellwieni(Hanzawa), Chalaroschwagerina (?) globosa(Schellwien). The group of Chalaroschwagerina(?) vulgaris (Schellwien) is emended.Based on this fusulinid assemblage, the limestoneboulders of Lercara are age-dated as earlyYakhtashian; i.e., earliest Artinskian (circa –280to –275 Ma). Therefore at least two distinct olistostromesare present in Sicily: the post-Yakhtashian olistostrome studied here, and thesecond one post-Dorashamian in age. Similarassemblages do not occur in adjacent Europeanareas (Camic Alps, Montenegro or Greece), butthey have been recorded in Darvas (North Pamir)and Japan, revealing constant paleoecologicalconditions throughout the Paleotethys.2008040232红 海 中 部 深 水 相 底 栖 有 孔 虫 = Deep-sea benthicforaminifera from the central Red Sea. ( 英文 ). Edelman-Furstenberg Y; Scherbacher M.Journal of Foraminiferal Research, 2001, 31(1):48-59The distribution of living (Rose Bengalstained),dead and fossil benthic foraminiferawas investigated in six short cores (multicores,30–32 cm total length) recovered from the centralRed Sea. The ecological preferences as wellas the relationship between the live anddead/fossil assemblages (preserved down-core)were examined. The sites, located along a W-Eprofile and between the depth of 366 and 1782 m,extend from the center of the oxygen minimumzone (OMZ, ~200–650 m), through its margin at~600 m, and down to the well-aerated deepwaterenvironment. Live (Rose-Bengal stained)and coexisting dead foraminifera were studied inthe upper 5cm of each of the sites, and the fossilrecord was studied down to ~32 cm. Q-modePrincipal Component Analysis was used andfour distinct foraminiferal fossil assemblageswere determined. These assemblages follow differentwater mass properties. In the center of theOMZ, where the organic carbon content is highestand the oxygen concentration is lowest (0.5ml O2/1), the Bolivina persiensis-Bulimina marginata-Discorbinellarhodiensis assemblagedominates. The slightly more aerated and lowerorganic-carbon-content seafloor, at the margin ofthe OMZ, is characterized by the Neouvigerinaporrecta-Gyroidinoides cf. G. soldanii assemblage.The transitional environment, between900–1200m, with its well-aerated and oligotrophicseafloor, is dominated by the Neouvigerinaampullacea-Cibicides mabahethi assemblage.The deeper water (>1500m), characterized bythe most oxygenated and oligotrophic seafloorconditions, is associated with the Astrononion sp.A-Hanzawaia sp. A assemblage. Throughout theRed Sea extremely high values of temperatureand salinity are constant below ~200m depth,but the flux of organic matter to the sea floorvaries considerably with bathymetry and appearsto be the main controlling factor governing thedistribution pattern of the benthic foraminifera.Comparison between live and the dead/fossilassemblages reveals a large difference betweenthe two. Processes that may control this differenceinclude species-specific high turnover rates,and preferential predation and loss of fragile taxa(either by chemical or microbial processes). Sig-74
nificant variations in the degree of loss of theorganic-cemented agglutinants were observeddown core. This group is preserved down to 5–10 cm at the shallow OMZ sites and down togreater depths at well-aerated and oligotrophicsites. The lower rate of disintegration of theseforms, in the deeper locations of the Red Sea,may be related to low microbial activity. Thisresults in the preservation of increasing numbersof organic-cemented shells down-core.2008040233关 于 底 栖 有 孔 虫 生 物 量 与 有 机 炭 通 量 的 关 系= On the coherence of organic carbon flux andbenthic forminiferal biomass. ( 英 文 ). AltenbachA V; Struck U. Journal of Foraminiferal Research,2001, 31(2): 79-85Benthic foraminiferal biomass values from theliterature are compared with annual flux rates oforganic carbon to the sea floor. A data set of 212locations is compiled from 2m to 9300m waterdepth, covering the Arctic, Atlantic, Indian, andPacific Oceans. Annual flux rates nearly cover 3orders of magnitude (0.3g to >100g Corg m–2),and foraminiferal biomass covers more than 5orders of magnitude (0.01 mg to >4g Corg m–2).In shallow waters no coherence is observed dueto randomly distributed biomass values spanning4 orders of magnitude. Flux rates and biomassvalues are correlated (r = 0.7, p < 0.001) at waterdepth below 1000m, but within a broad range ofvariability (about factor 4 from the regressionline). Annual fluctuations of foraminiferal biomassvalues are reported by several authorswithin a factor of 5 to more than 10, corroboratingthese ranges of variability as natural. In addition,broad deviations were observed to resultfrom methodological errors or spatial gradients.In the deep sea, annual flux rates of organic carbonrange from 0.3 to 5g m–2. The gradient inmean foraminiferal biomass (Corg) is steeper,decreasing from 0.002 to 0.3g m–2. A decreaseof annual flux rates by a factor of about 10 producesa decrease in mean foraminiferal biomassby a factor of more than 100. As a result, thepotential nutritional supply per biomass unit orindividual is gradually improved by up to a factorof 10 for most oligotrophic environments.This may be considered an adaptation to loweredefficiency of food gathering and increasingamounts of biodegraded matter. From the calculationspresented, an annual turnover of foraminiferalbiomass can be estimated within 1 to2 years.2008040234底 栖 有 孔 虫 和 孔 隙 水 氧 含 量 -- 西 伊 比 利 亚 边缘 种 的 边 界 条 件 的 重 新 审 视 = Benthic foraminiferaand pore-water oxygen profiles: a reassessmentof species boundary conditions at thewestern Iberian Margin. ( 英 文 ). Joachim Schönfeld.Journal of Foraminiferal Research, 2001,31(2): 86-107The depth distribution of living (Rose Bengalstained)benthic foraminifera in near-surfacesediments was analyzed along 4 short cores fromthe western Iberian Margin and Gulf of Cadiz atwater depths from 800 to 1920 m. Pore-wateroxygen, Chloroplastic Pigment Equivalent(CPE), and total organic carbon (Corg) concentrationswere measured in the same or adjacentcores. These values were used to constrain thelimiting oxygen and nutrient levels that definedthe ranges in sediment depth and abundancemaxima of foraminiferal species. The populationdensity showed a good correlation with porewateroxygenation indicating that oxygen is alimiting factor for endobenthic foraminiferalassemblages at mid-depths between 800 and1200m. At the deep-water site, however, thefauna appeared nutrient limited. More than halfof the benthic species occupied extended sedimentdepth habitats and a wide range of oxygenlevels among the sites studied. Thirty-nine of103 species occurred in two or more cores andshowed distinct abundance maxima, 36 in theuppermost 2.0 cm where the CPE concentrationswere high. Living foraminifers were not found atdepths where the CPE-values were lower than0.1 µg/g. This level indicates trophic conditionscritical for the survival of endobenthic species.The frequency distribution of the lower oxygenrange limits of all species showed maxima at thehigh oxic/low oxic (3 ml/l), low oxic/suboxic(1.5 ml/l), and suboxic/dysoxic (0.3 ml/l)boundaries and thus depicted the ecological significanceof these previously recognized ecolimits.Only 30 % of the species display consistentpatterns in relation to pore water oxygen. Dysoxicindicators were Globobulimina affinis,Chilostomella ovoidea and Bathysiphon capillare.Many species previously designated assuboxic indicators were ubiquitous or preferredmicrohabitats at oxic levels. Boundary conditionsfor the dysoxic indicator G. affinis werepelagic flux rates higher than 3.5g C m–2 yr–1, ahabitat depth below the homogeneously bioturbatedlayer in areas outside of high productivityzones, and CPE concentrations of 0.1 to 1.0,preferentially 0.7 to 0.8 µg/g. The distributionpattern suggested that G. affinis thrives mainlyon dysoxic bacteria and actively seeks this nutrientresource.2008040235加 拿 大 马 尼 托 巴 Winnipegosis 湖 北 部 非 海 相有 孔 虫 Cribroelphidium gunteri 的 发 现 =Non-marine occurrence of the foraminifer Cribroelphidiumgunteri in northern lake Winnipegosis,Manitoba, Canada. ( 英 文 ). Boudreau R E;75
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第 4 卷 第 4 期古 生 物 学
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Fossils, i.e. remains of living org
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nus, a new ichnospecies of Fuersich
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以 松 柏 类 和 盾 籽 类 为
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Island, Papua New Guinea. ( 英 文
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A C. Canadian Journal of Earth Scie
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mated depositional interval of 10 t
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北 海 古 近 纪 一 种 新 型
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scabrate-verrucate, and rugulate mi
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the Tetori Group in the Kuzuryu are
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during the Late Pleistocene are rec
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shelf basin off the northern coast
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like base referred to Primocandelab
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鱼 类2008040413大 西 洋 鳕
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long as the humerus plus radius, ve
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members in both size and abundance
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ple's Republic of China. ( 英 文
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K-P transition in Brazil. ( 英 文
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wide tooth crowns, a sub-rectangula
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2008040459罗 马 尼 亚 特 兰
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logical descriptions of all availab
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东 副 特 提 斯 晚 萨 马 期
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S; Vaiani S C. Rivista Italiana di
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adiocarbon dating the arrival of th
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able problems, particularly differe
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done with glyphs on paper. In this
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obtained through extensive field-ba
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noli G; Maletz J; Stouge S. Canadia
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法 国 蒙 塔 格 尼 努 尔 中
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presence of well-rounded, coarse-sa
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缅 甸 北 部 Hukawng 峡 谷 琥
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graphy and Geological Correlation,
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plex,northwestern Iran. ( 英 文 )
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松 辽 盆 地 晚 白 垩 世 青
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ous nannoplankton) points of view.O
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the"Yanshan Movement".During the Mi
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geochemical approach discussed in t
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sediments from the northern shelf o
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意 大 利 北 亚 平 宁 Lamone
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nano record further into the early
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lankovitch-scale frequency. Analyse