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Quantifying relations between altered hydrology and fish community responses for streams in Minnesota

Ecological Processes 2022年第1期11卷 536-560页

作者： Jeffrey R.Ziegeweid Gregory D.Johnson aliesha l.krall Kara Fitzpatrick Sara B.levin U.S.Geological Survey California Water Science Center6000 J StPlacer HallSacramentoCA 85819USA U.S.Geological Survey Upper Midwest Water Science Center2280 Woodale DrMounds ViewMN 55112USA Minnesota Pollution Control Agency 520 Lafayette RdSt.PaulMN 55155USA Minnesota Pollution Control Agency 7678 College RoadSuite 105BaxterMN 56425USA

Background:Altered hydrology is a stressor on aquatic life,but quantitative relations between specific aspects of streamflow alteration and biological responses have not been developed on a statewide scale in *** sub-sets regression analysis was used to develop linear regression models that quantify relations among five categories of hydrologic metrics(i.e.,duration,frequency,magnitude,rate-of-change,and timing)computed from streamgage records and six categories of biological metrics(i.e.,composition,habitat,life history,reproductive,tolerance,trophic)computed from fish-community samples,as well as fish-based indices of biotic integrity(FIBI)scores and FIBI scores normalized to an impairment threshold of the corresponding stream class(FIBI_BCG4).Relations between hydrology and fish community responses were examined using three hydrologic datasets that represented periods of record,long-term changes,and short-term changes to flow regimes in streams of ***:Regression models demonstrated significant relations between hydrologic explanatory metrics and fish-based biological response metrics,and the five regression models with the strongest linear relations explained over 70%of the variability in the biological metric using three hydrologic metrics as explanatory ***-based biological metrics demonstrated the strongest linear relations to hydrologic *** most commonly used hydrologic metrics were related to bankfull flows and aspects of flow ***:Final regression models represent paired streamgage records and biological samples throughout the State of Minnesota and encompass differences in stream orders,hydrologic landscape units,and watershed *** methods can support evaluations of stream fish communities and facilitate targeted efforts to improve the health of fish *** also can be applied to locations outside of Minnesota with continuous streamgage data and fish-community sampl

关键词： EflowStats Best subset regression Altered hydrology Fish community Indices of biotic integrity Ecological flows

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A NEW lOOK AT SOME ClASSIC PROBlEMS IN ORTHOGONAl POlYNOMIAlS

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数学学报(中文版) 1982年第6期 731-736页

作者： D.Mangeron,A.M.krall,D.l.Fernandz,P.T.Craciunas Aleea Grigore Ghica Voda 25 6600 Iasi 6 ROMANIA. McAllister Building University Park Pa.16802 U.S.A. IMECC Universidade Estadual de Campinas 13100 Campinas S.P. BRAZIl. Polytechnic Institute of Jassy Iasi ROMANIA.

Until recently there were two kinds of orthogonality commonly accepted:that generatedby a real weight function and that generated by a complex weight function with integrationtaken along a path in the complex *** authors following *** and *** [10] research work are discussing the orthogonality from the point of view of distribu-tion *** doing so a third and new kind of orthogonality is pointed *** some of the authors' forthcoming papers vrious kinds of orthogonality for polynomialsin several variables will be discussed [14]—[16],while the appropriate papers will deal ***'s comprehensive very recent results [17] and with ***'s“total derivativeoperators”systems in the framework of ***'s polyvibrating or polywave equations,respectively.

关键词：数学学报 A NEW lOOK AT SOME ClASSIC PROBlEMS IN ORTHOGONAl POlYNOMIAlS real

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WEIGHT FUNCTIONS FOR SOME NEW ClASSES OF ORTHOGONAl POlYNOMIAlS

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数学学报(中文版) 1983年第5期 559-565页

作者： D.M.Casesnoves,D.Mangeron,A.M.krall,D.l.Fernandez Real Academia de Ciencias Exactas Fisicas y Naturales de Madrid.SPAIN. Polytechnic Institute of Jassy Iasi ROMANIA. The Pennsylvania State University.Dept.of Mathematics.University Park USA. IMECC UNICAMP.Campina SP.BRASIl.

This article continue the discussion of finding weight functions for orthogonal polynomials in thtee situations. The Gegenbauer polynoraials are shown to have a distributional weight *** polynomials of Geronimus [6] which are orthogonal on[—1,1]ale explicitely *** application to Pade approximations is *** negative situations are mentioned.

关键词： WEIGHT FUNCTIONS FOR SOME NEW ClASSES OF ORTHOGONAl POlYNOMIAlS

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颗粒物成分短期暴露与死亡率:美国全国城市社区研究

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环境与职业医学 2014年第1期31卷 35-35页

作者： Jenna R. krall G. Brooke Anderson Francesca Dominici Michelle l. Bell Roger D. Peng

[背景]虽然人们已经对PM2.5的质量与死亡率之间的关联进行了广泛研究，但很少有国家级的分析来评估PM2.5的化学成分对死亡率的影响。流行病学研究认为，PM2.5对死亡率的预估影响存在空间和季节性变化。我们推测，如果PM2.5的成分变化导... 详细信息

[背景]虽然人们已经对PM2.5的质量与死亡率之间的关联进行了广泛研究，但很少有国家级的分析来评估PM2.5的化学成分对死亡率的影响。流行病学研究认为，PM2.5对死亡率的预估影响存在空间和季节性变化。我们推测，如果PM2.5的成分变化导致PM2.5对死亡率估值的影响产生变化，

关键词：化学成分死亡率城市社区短期暴露颗粒物 PM2 5 美国季节性变化

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