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| 1 | Effect of forest fragment size on tree diversity and population structure of humid subtropical forest of Meghalaya, India显示文摘The present study was conducted in subtropical humid forests of Meghalaya to study the distributional pattern of species, floristic composition, community structure and tree population structure.Forest fragments of varying sizes(0.5 ha, 1 ha, 2 ha and 5 ha) were used in the study.All of the forest fragments are distributed within the same altitudinal range, and had similar rainfall and temperature regimes.Four forest fragments were sampled using random quadrats to analyze the impact of fragment size on tree diversity and population structure.Indices were used to compare the dispersion pattern of plant species, species diversity among fragments, and the heterogeneity and homogeneity of the fragments.A total of 45 tree species were recorded from all the fragments and simple correlation showed that the species richness was positively related to fragment size(n = 4, P<0.05).Other measures such as stand density, basal cover, diversity and dominance indices were unrelated to fragment size.Forest canopy was composed mainly of Castonopsis indica, C.armata, Schima khasiana and Engelhardtia spicata in all of the fragments.A majority of woody tree species were contagiously distributed which made the forest community highly patchy in nature.Low values of Sorensen's similarity index and high values of Whittaker's β-diversity index between the fragments suggest marked difference in the species composition among the fragments.The maximum stand density, basal area, Shannon diversity index and Simpson dominance index was recorded in a 5-ha fragment.Trees in lower girth classes(15-55 cm circumference at breast height, CBH) accounted for 52-86% of stand density in all fragments except in 0.5-ha fragments where middle girth class(55-95 cm CBH) accounted for 47% of the total stand density.The overall density of seedlings, saplings and adult trees formed a pyramidal structure, indicating that the period between the sapling and adult stage was a critical stage in tree life cycles, as the maximum mortality occurred during this period.These groves are mildly/highly disturbed by communities using forests for their timber and fuel wood requirements as well as cattle and goat grazing.Tree regeneration was apparently not limited, as was evidenced by high density of saplings.These human activities may have been responsible for a decrease in tree diversity in the smaller fragments.Large fragments that were less disturbed harbored species not present in small fragments. | Om Prakash Tripathi Khongjee Rangdajied Reynald | 2010 | 生物多样性2010，18，2： | 1 |
| 2 | The benzophenanthridine alkaloid fagaronine induces erythroleukemic cell differentiation by gene activation显示文摘 | Upont Claude Couillerot Eric Gillet Reynald | 2005 | Planta Med2005，71，： | 1 |
| 3 | A review of the Sierra Cooperative Pilot Project显示文摘 | Reynalds D W A S Dennis | 1986 | Bull Amer Meteor Soc1986，67，5： | 1 |
| 4 | Piperazine derivatives of butyric acid as differentiating agents in human leukemic cells显示文摘 | Reynald Gillet P. Jeannesson Houcine Sefraoui Marie-Luce Arnould-Guérin Serge Kirkiacharian Jean-Claude Jardillier Fran?ois Pieri | 1997 | Cancer Chemotherapy and Pharmacology1997，，3： | 1 |
| 5 | Bulladecin and atemotetrolin, two bis-tetrahydrofuran acetogenins from Annona atemoya seeds 显示文摘 | Philippe D Reynald H Andri C | 1998 | Phytochernistry1998，48，8： | 1 |
| 6 | Surface subsidence and uplift above a headrace tunnel in metamorphic basement rocks of the Swiss Alps as detected by satellite SAR interferometry显示文摘 | Tazio Strozzi Reynald Delaloye Damien Poffet Jürgen Hansmann Simon Loew | 2011 | Remote Sensing of Environment2011，，6： | 1 |
| 7 | Inhibition of theAscasphaera apis by Bacillus and Paenibacills strain isolated from honey 显示文摘 | Reynald FJ | 2004 | Revista Argentina de Microbiologla2004，36，： | 1 |
| 8 | The develop- ment of a high - yield recombinant protein bioreactor through RNAi induced knockdown of ATP/ADP transporter in Solanum tuberosum 显示文摘 | Reynald Tremblaya Hong Diaob Norm H~iner | 2011 | J Biotechnol2011，156，1： | 1 |
| 9 | High-yield expression of re-combinant soybean agglutinin in plants using transient and sta-ble systems 显示文摘 | Reynald T Mary F Rima M | 2011 | Transgenic Res2011，，20： | 1 |
| 10 | Tobacco: a highly efficient green bioreactor for production of therapeutic proteins 显示文摘 | Reynald Tremblay David Wang Anthony M Jevniker | 2010 | Biotechnology Avances2010，28，2： | 1 |
| 11 | Iron-catalyzed Arylation of Hetero ArylHalides by Grignard Reagents 显示文摘 | J6r? me Q Xavier F Reynald H | 2002 | Tetrahedron Lett2002，43，19： | 1 |
| 12 | Bcl-2 prolongs cell survival after Bax-indueed release of cytochrome C 显示文摘 | Thierry R Reynald O Laurent M | 1998 | Nature1998，391，29： | 1 |
| 13 | Ora Quic advance rapid HIV-1/2 antibody test显示文摘 | Reynalds S J Muwonga J | 2004 | Expert Review of Malecular Diagnostics2004，4，5： | 1 |
| 14 | Drug interactions evaluation : An integrated part of risk assessment of therapeutics 显示文摘 | Zhang L Reynalds K S Zhao P | 2010 | Toxicol Appl Pharmacol2010，243，2： | 1 |
| 15 | Parentral hypertensionand 24 h-blood pressure in children prior to diabetic nephropathy显示文摘 | Guntsche Z Saravi FD Reynalds EA | 2002 | Pediatr Nephrol2002，17，3： | 1 |
| 16 | The pittsburgh sleep quality index: a new instrument for psychiatric practice and research显示文摘 | Buysse D J Reynalds Ⅲ Monk T H | 1989 | Psychiatry Research1989，28，： | 1 |
| 17 | Septa within the sinus:effect on elevation of the sinus floor显示文摘 | Bruno E Reynald DC Yves L | | 0，，： | 1 |
| 18 | Usefulness of CT reconstructed pictures for diaphragmatic rupture after blunt trauma 显示文摘 | Christophe T Fabrice M Reynald I | 2004 | J Am Coll Surgeons2004，198，4： | 1 |
| 19 | Carbon footprint of spring wheat in response to fallow frequency and soil carbon changes over 25 years on the semiarid Canadian prairie显示文摘 | Yantai Gan Chang Liang Con A. Campbell Robert P. Zentner Reynald L. Lemke Hong Wang Chao Yang | 2012 | European Journal of Agronomy2012，，： | 1 |
| 20 | High-dynamic range image projection using an auxiliary MEMS mirror array 显示文摘 | Reynald Hoskinson Boris Stoeber | 2008 | Optics Express2008，16，10： | 1 |
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