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Two decades of variable retention in British Columbia: a review of its implementation and effectiveness for biodiversity conservation

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Ecological Processes 2019年第1期8卷 402-423页

作者： William j.Beese john Deal B.Glen Dunsworth Stephen j.Mitchell timothy j.philpott Vancouver Island University 900 Fifth StreetNanaimoBC V9R 5S5Canada Western Forest Products 118–1334 Island Hwy.Campbell RiverBC V9W 8C9Canada Glen Dunsworth Ecological Consulting 7857 Shangri-La Rd.LantzvilleBC V0R 2H0Canada University of British Columbia 2424 Main MallVancouverBC V6T 1Z4Canada BC Min.of Forests Lands and Nat.Res.Oper400–640 Borland St.Williams LakeBC V2G 4T1Canada

Stand-level retention is an important component of sustainable forest management which aims to balance ecological,social and economic ***-term retention of mature forest structures at the time of harvesting(variable retention)is intended to produce future forest stands that more closely resemble conditions that develop after natural disturbances,thereby maintaining greater diversity of habitats for a variety of *** includes features such as live and dead trees representing multiple canopy layers,undisturbed understory vegetation and coarse woody *** the past two decades,variable retention has become common on forest lands in the temperate rainforests of coastal British Columbia(BC)and has been applied to a lesser extent in inland forest *** review of studies in BC and in similar forest types in our region indicates that both aggregated and dispersed retention can contribute to biodiversity conservation by providing short-term‘life-boating’habitat for some species and by enhancing the structural characteristics of future *** example,greater abundance of species present in the pre-harvest forest have been documented for vegetation,birds,carabid beetles,gastropods,ectomycorrhizal fungi and soil fauna in retention cutblocks compared to *** are,however,some negative consequences for timber production such as wind damage to retained trees and reduced growth rates of tree regeneration compared to *** authors suggest an adaptive management approach for balancing competing objectives when faced with *** includes monitoring the implementation and effectiveness of various strategies for achieving *** two decades of experience applying variable retention harvesting to industrial-scale management of forest lands in BC suggests that it is possible to balance production of wood with biodiversity conservation.

关键词： Alternative silvicultural systems Clearcutting Biological legacies Forest biodiversity Old-growth Variable retention British Columbia

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耐抗生素性与流感嗜血杆菌

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微生物学杂志 1985年第2期 63-64页

作者： j. philpott-HOWARD 刘华珍

十年前,要选择一种抗生素治疗由流感嗜血杆菌而引起的疾病,一般不会遇到困难。然而近年来,随着嗜血杆菌耐抗生素性的日益增强,选择抗生素对于侵入或非侵入的感染的初期治疗已成为必须重新估价的问题(Syriopoulou et al.,1978)(philpott-... 详细信息

十年前,要选择一种抗生素治疗由流感嗜血杆菌而引起的疾病,一般不会遇到困难。然而近年来,随着嗜血杆菌耐抗生素性的日益增强,选择抗生素对于侵入或非侵入的感染的初期治疗已成为必须重新估价的问题(Syriopoulou et al.,1978)(philpott-Howard and Williams,1982,Schefele,1982)。在英国和北美有

关键词：流感嗜血杆菌氯霉素青霉素英国耐药性流感杆菌嗜血杆菌属氯胺苯醇抗菌素大不列颠及北爱尔兰联合王国抗药性内酞胺抗生素

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氯化钾治疗输卵管妊娠的手术风险

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世界核心医学期刊文摘（妇产科学分册） 2006年第10期2卷 61-61页

作者： Goldstein j.S. Ratts V.S. philpott T. Dahan M.H. 柳蕴 Washington University Medical School 4444 Forest Park Ave. St. LouisMO 63108 United States Dr.

BACKGROUND: Spontaneous heterotopic pregnancies are rare, but with assisted reproductive techniques the incidence may approach 1∶100. With the widespread use of transvaginal ultrasonography, physicians have attempted treatment of heterotopic pregnancies with minimally invasive procedures such as transvaginal guided potassium chloride(KCl) injection. However, there are few data on the success of this treatment. CASE: A 30-year-old primigravida presented with a desired pregnancy and was found to have a tubal pregnancy in addition to an intrauterine pregnancy. Ultrasound-guided KCl injection into the heterotopic pregnancy was complicated by abdominal pain, surgical abdomen, and hemoperitoneum requiring salpingectomy. CONCLUSION: A review of the literature revealed that 55%of tubal heterotopic pregnancies treated by KCl injection required subsequent salpingectomy. This raises concerns about the advisability of this treatment.

关键词：输卵管妊娠输卵管切除术经阴道超声宫内妊娠辅助生殖技术初次妊娠微创操作腹腔积血文献资料

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