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  • 1
    Publication Date: 1999-12-11
    Description: Dipterocarpaceae, the dominant family of Bornean canopy trees, display the unusual reproductive strategy of strict interspecific mast-fruiting. During 1986-99, more than 50 dipterocarp species dispersed seed only within a 1- to 2-month period every 3 to 4 years during El Nino-Southern Oscillation events. Synchronous seed production occurred across extensive areas and was essential for satiating seed predators. Logging of dipterocarps reduced the extent and intensity of these reproductive episodes and exacerbated local El Nino conditions. Viable seed and seedling establishment have declined as a result of climate, logging, and predators. Since 1991, dipterocarps have experienced recruitment failure within a national park, now surrounded by logged forest.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Curran -- Caniago I -- Paoli -- Astianti -- Kusneti -- Leighton -- Nirarita -- Haeruman -- New York, N.Y. -- Science. 1999 Dec 10;286(5447):2184-8.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Biology and School of Natural Resources and Environment, University of Michigan, Ann Arbor, MI 48109, USA. U.S. Agency for International Development-Natural Resource Management, Pontianak, West Kalimantan 78121, Indonenia. D.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10591655" target="_blank"〉PubMed〈/a〉
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 2
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1998-08-28
    Description: The effects of commercial logging on tree diversity in tropical rainforest are largely unknown. In this study, selectively logged tropical rainforest in Indonesian Borneo is shown to contain high tree species richness, despite severe structural damage. Plots logged 8 years before sampling contained fewer species of trees greater than 20 centimeters in diameter than did similar-sized unlogged plots. However, in samples of the same numbers of trees (requiring a 50 percent larger area), logged forest contained as many tree species as unlogged forest. These findings warrant reassessment of the conservation potential of large tracts of commercially logged tropical rainforest.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Cannon -- Peart -- Leighton -- New York, N.Y. -- Science. 1998 Aug 28;281(5381):1366-8.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉C. H. Cannon, Department of Botany, Duke University, Durham, NC 27708, USA, and Institute of Biodiversity and Environmental Conservation, University of Malaysia, Sarawak, Malaysia. D. R. Peart, Department of Biological Sciences, Dartmouth.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9721105" target="_blank"〉PubMed〈/a〉
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 3
    Publication Date: 2012-07-27
    Description: The rapid disruption of tropical forests probably imperils global biodiversity more than any other contemporary phenomenon. With deforestation advancing quickly, protected areas are increasingly becoming final refuges for threatened species and natural ecosystem processes. However, many protected areas in the tropics are themselves vulnerable to human encroachment and other environmental stresses. As pressures mount, it is vital to know whether existing reserves can sustain their biodiversity. A critical constraint in addressing this question has been that data describing a broad array of biodiversity groups have been unavailable for a sufficiently large and representative sample of reserves. Here we present a uniquely comprehensive data set on changes over the past 20 to 30 years in 31 functional groups of species and 21 potential drivers of environmental change, for 60 protected areas stratified across the world's major tropical regions. Our analysis reveals great variation in reserve 'health': about half of all reserves have been effective or performed passably, but the rest are experiencing an erosion of biodiversity that is often alarmingly widespread taxonomically and functionally. Habitat disruption, hunting and forest-product exploitation were the strongest predictors of declining reserve health. Crucially, environmental changes immediately outside reserves seemed nearly as important as those inside in determining their ecological fate, with changes inside reserves strongly mirroring those occurring around them. These findings suggest that tropical protected areas are often intimately linked ecologically to their surrounding habitats, and that a failure to stem broad-scale loss and degradation of such habitats could sharply increase the likelihood of serious biodiversity declines.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Laurance, William F -- Useche, D Carolina -- Rendeiro, Julio -- Kalka, Margareta -- Bradshaw, Corey J A -- Sloan, Sean P -- Laurance, Susan G -- Campbell, Mason -- Abernethy, Kate -- Alvarez, Patricia -- Arroyo-Rodriguez, Victor -- Ashton, Peter -- Benitez-Malvido, Julieta -- Blom, Allard -- Bobo, Kadiri S -- Cannon, Charles H -- Cao, Min -- Carroll, Richard -- Chapman, Colin -- Coates, Rosamond -- Cords, Marina -- Danielsen, Finn -- De Dijn, Bart -- Dinerstein, Eric -- Donnelly, Maureen A -- Edwards, David -- Edwards, Felicity -- Farwig, Nina -- Fashing, Peter -- Forget, Pierre-Michel -- Foster, Mercedes -- Gale, George -- Harris, David -- Harrison, Rhett -- Hart, John -- Karpanty, Sarah -- Kress, W John -- Krishnaswamy, Jagdish -- Logsdon, Willis -- Lovett, Jon -- Magnusson, William -- Maisels, Fiona -- Marshall, Andrew R -- McClearn, Deedra -- Mudappa, Divya -- Nielsen, Martin R -- Pearson, Richard -- Pitman, Nigel -- van der Ploeg, Jan -- Plumptre, Andrew -- Poulsen, John -- Quesada, Mauricio -- Rainey, Hugo -- Robinson, Douglas -- Roetgers, Christiane -- Rovero, Francesco -- Scatena, Frederick -- Schulze, Christian -- Sheil, Douglas -- Struhsaker, Thomas -- Terborgh, John -- Thomas, Duncan -- Timm, Robert -- Urbina-Cardona, J Nicolas -- Vasudevan, Karthikeyan -- Wright, S Joseph -- Arias-G, Juan Carlos -- Arroyo, Luzmila -- Ashton, Mark -- Auzel, Philippe -- Babaasa, Dennis -- Babweteera, Fred -- Baker, Patrick -- Banki, Olaf -- Bass, Margot -- Bila-Isia, Inogwabini -- Blake, Stephen -- Brockelman, Warren -- Brokaw, Nicholas -- Bruhl, Carsten A -- Bunyavejchewin, Sarayudh -- Chao, Jung-Tai -- Chave, Jerome -- Chellam, Ravi -- Clark, Connie J -- Clavijo, Jose -- Congdon, Robert -- Corlett, Richard -- Dattaraja, H S -- Dave, Chittaranjan -- Davies, Glyn -- Beisiegel, Beatriz de Mello -- da Silva, Rosa de Nazare Paes -- Di Fiore, Anthony -- Diesmos, Arvin -- Dirzo, Rodolfo -- Doran-Sheehy, Diane -- Eaton, Mitchell -- Emmons, Louise -- Estrada, Alejandro -- Ewango, Corneille -- Fedigan, Linda -- Feer, Francois -- Fruth, Barbara -- Willis, Jacalyn Giacalone -- Goodale, Uromi -- Goodman, Steven -- Guix, Juan C -- Guthiga, Paul -- Haber, William -- Hamer, Keith -- Herbinger, Ilka -- Hill, Jane -- Huang, Zhongliang -- Sun, I Fang -- Ickes, Kalan -- Itoh, Akira -- Ivanauskas, Natalia -- Jackes, Betsy -- Janovec, John -- Janzen, Daniel -- Jiangming, Mo -- Jin, Chen -- Jones, Trevor -- Justiniano, Hermes -- Kalko, Elisabeth -- Kasangaki, Aventino -- Killeen, Timothy -- King, Hen-biau -- Klop, Erik -- Knott, Cheryl -- Kone, Inza -- Kudavidanage, Enoka -- Ribeiro, Jose Lahoz da Silva -- Lattke, John -- Laval, Richard -- Lawton, Robert -- Leal, Miguel -- Leighton, Mark -- Lentino, Miguel -- Leonel, Cristiane -- Lindsell, Jeremy -- Ling-Ling, Lee -- Linsenmair, K Eduard -- Losos, Elizabeth -- Lugo, Ariel -- Lwanga, Jeremiah -- Mack, Andrew L -- Martins, Marlucia -- McGraw, W Scott -- McNab, Roan -- Montag, Luciano -- Thompson, Jo Myers -- Nabe-Nielsen, Jacob -- Nakagawa, Michiko -- Nepal, Sanjay -- Norconk, Marilyn -- Novotny, Vojtech -- O'Donnell, Sean -- Opiang, Muse -- Ouboter, Paul -- Parker, Kenneth -- Parthasarathy, N -- Pisciotta, Katia -- Prawiradilaga, Dewi -- Pringle, Catherine -- Rajathurai, Subaraj -- Reichard, Ulrich -- Reinartz, Gay -- Renton, Katherine -- Reynolds, Glen -- Reynolds, Vernon -- Riley, Erin -- Rodel, Mark-Oliver -- Rothman, Jessica -- Round, Philip -- Sakai, Shoko -- Sanaiotti, Tania -- Savini, Tommaso -- Schaab, Gertrud -- Seidensticker, John -- Siaka, Alhaji -- Silman, Miles R -- Smith, Thomas B -- de Almeida, Samuel Soares -- Sodhi, Navjot -- Stanford, Craig -- Stewart, Kristine -- Stokes, Emma -- Stoner, Kathryn E -- Sukumar, Raman -- Surbeck, Martin -- Tobler, Mathias -- Tscharntke, Teja -- Turkalo, Andrea -- Umapathy, Govindaswamy -- van Weerd, Merlijn -- Rivera, Jorge Vega -- Venkataraman, Meena -- Venn, Linda -- Verea, Carlos -- de Castilho, Carolina Volkmer -- Waltert, Matthias -- Wang, Benjamin -- Watts, David -- Weber, William -- West, Paige -- Whitacre, David -- Whitney, Ken -- Wilkie, David -- Williams, Stephen -- Wright, Debra D -- Wright, Patricia -- Xiankai, Lu -- Yonzon, Pralad -- Zamzani, Franky -- England -- Nature. 2012 Sep 13;489(7415):290-4. doi: 10.1038/nature11318.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Centre for Tropical Environmental and Sustainability Science and School of Marine and Tropical Biology, James Cook University, Cairns, Queensland 4878, Australia. bill.laurance@jcu.edu.au〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/22832582" target="_blank"〉PubMed〈/a〉
    Keywords: Agriculture/statistics & numerical data ; Animals ; *Biodiversity ; Conservation of Natural Resources/*statistics & numerical data ; Data Collection ; Ecology/statistics & numerical data ; Endangered Species/*statistics & numerical data ; Environmental Pollution/adverse effects/statistics & numerical data ; Fires/statistics & numerical data ; Forestry/statistics & numerical data ; Interviews as Topic ; Mining/statistics & numerical data ; Population Growth ; Rain ; Reproducibility of Results ; Research Personnel ; Surveys and Questionnaires ; Temperature ; Trees/*physiology ; *Tropical Climate
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
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  • 4
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Forest Ecology and Management 67 (1994), S. 49-68 
    ISSN: 0378-1127
    Keywords: Canopy structure ; Conservation ; Heterogeneity ; Management ; Mechanized logging ; Residual stand
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Type of Medium: Electronic Resource
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  • 5
    Publication Date: 2020-10-23
    Description: In December 2018, Mount Etna (Italy) experienced a period of increased eruptive activity that culminated in a fissure eruption on the southeast flank. After the onset of the flank eruption, the peak frequency of the summit infrasound signals decreased while resonance increased. We invert infrasound observations for crater geometry and show that crater depth and radius increased during the eruption, which suggests that the flank eruption drained magma from the summit and that eruptive activity led to erosion of the crater wall. By inverting the entire infrasound amplitude spectra rather than just the peak frequency, we are able to place additional constraints on the crater geometry and invert for, rather than assume, the crater shape. This work illustrates how harmonic infrasound observations can be used to obtain hightemporal‐ resolution information about crater geometry and can place constraints on complex processes occurring in the inaccessible crater region during eruptive activity.
    Description: Published
    Description: e2020GL088077
    Description: 2V. Struttura e sistema di alimentazione dei vulcani
    Description: JCR Journal
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Type: article
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  • 6
    Publication Date: 2023-09-11
    Description: Infrasound signals are used to investigate and monitor active volcanoes during eruptive and degassing activity. Infrasound amplitude information has been used to estimate eruptive parameters such as plume height, magma discharge rate, and lava fountain height. Active volcanoes are characterized by pronounced topography and, during eruptive activity, the topography can change rapidly, affecting the observed infrasound amplitudes. While the interaction of infrasonic signals with topography has been widely investigated over the past decade, there has been limited work on the impact of changing topography on the infrasonic amplitudes. In this work, the infrasonic signals accompanying 57 lava fountain paroxysms at Mt. Etna (Italy) during 2021 were analyzed. In particular, the temporal and spatial variations of the infrasound amplitudes were investigated. During 2021, significant changes in the topography around the most active crater (the South East Crater) took place and were reconstructed in detail using high resolution imagery from unoccupied aerial system surveys. Through analysis of the observed infrasound signals and numerical simulations of the acoustic wavefield, we demonstrate that the observed spatial and temporal variation in the infrasound signal amplitudes can largely be explained by the combined effects of changes in the location of the acoustic source and changes in the near-vent topography, together with source acoustic amplitude variations. This work demonstrates the importance of accurate source locations and high-resolution topographic information, particularly in the near-vent region where the topography is most likely to change rapidly and illustrates that changing topography should be considered when interpreting local infrasound observations over long time scales.
    Description: Published
    Description: 54
    Description: 5V. Processi eruttivi e post-eruttivi
    Description: JCR Journal
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Type: article
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  • 7
    Publication Date: 1948-01-01
    Print ISSN: 0022-1376
    Electronic ISSN: 1537-5269
    Topics: Geosciences
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  • 8
    Publication Date: 1930-01-01
    Print ISSN: 0361-5995
    Electronic ISSN: 1435-0661
    Topics: Geosciences , Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Published by Wiley
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  • 9
    Publication Date: 2019
    Description: ABSTRACT Pneumatic seismic sources, commonly known as airguns, have been serving us well for decades but there is an increasing need for sources with improved low frequency signal and reduced environmental impact. In this paper, we present a new pneumatic source that is designed to achieve these goals by operating with lower pressures and larger volumes. The new source will release more air creating larger bubbles with longer bubble‐periods than airguns. The release of the air will be tuned so that the rise‐time will be longer and the sound pressure level and its slope will be lower. Certain engineering features will eliminate cavitation. Larger bubbles increase low frequency content of the signal, longer rise times decrease mid‐frequency content and the elimination of cavitation reduces high frequency content. We have not yet built a full‐scale version of the new source. However, we have manufactured a small‐scale low‐pressure source incorporating most of the engineering features, and tested it in a lake. Here, we present the lake data that, as expected, show a significant reduction in the sound pressure level, increase in rise‐time, decrease in slope, and decrease in high frequency content while maintaining the same low frequency content when the source prototype is operated at low pressure compared to high pressure. Synthetic data produced by numerical modeling of the full‐scale proposed pneumatic source suggest that the new source will improve the low frequency content and can produce geophysically useful signal down to 1 Hz. This article is protected by copyright. All rights reserved
    Print ISSN: 0016-8025
    Electronic ISSN: 1365-2478
    Topics: Geosciences , Physics
    Published by Wiley
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  • 10
    Publication Date: 1998-01-01
    Print ISSN: 0021-8820
    Electronic ISSN: 1881-1469
    Topics: Chemistry and Pharmacology , Medicine
    Published by Springer Nature
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