161,337 research outputs found
Rainforest roads and the future of forest-dependent wildlife: a case study of understory birds
No full text[Extract] In frontier tropical regions, road construction is widespread and escalating, and is among the most important causes of rainforest destruction. Roads are the first step leading to many of the existing and emerging threats to tropical forests, such as deforestation, habitat fragmentation, edge effects, selective logging, surface fires, illegal mining, and overhunting (Fearnside 1990a; Chomitz and Gray 1996; W. F. Laurance 1998; Cochrane et al. 1999; Nepstad et al. 1999b, 2001). Today, large intact areas of tropical rainforest occur only in areas where there is little or no present-day human access. Once physical access is provided, rapid ecosystem change can occur at both a local and landscape level.
Most economists see road building on the frontier as crucial for social and economic development (Chomitz and Gray 1996). Roads provide the means for humans to access natural resources such as timber, land, and minerals, and for the movement of these resources to markets. The end result may be income-earning industries such as logging, farming, and mining, yet for the ecosystem there is widespread habitat disturbance and fragmentation (W. F. Laurance et al. 200lb, 2006a; Peres 2001a)
Twenty Landmark Papers in Biodiversity Conservation
Get PDFCorey J.A. Bradshaw, Navjot S. Sodhi, William F. Laurance and Barry W. Broo
Book Reviews
Get PDFBook Reviews by Brendan F. Brown, Laurance M. Hyde, Francis W. Johnston, W. T. Lovins, and Robert B. Vining
Book Reviews
No full textBook Reviews by Brendan F. Brown, Laurance M. Hyde, Francis W. Johnston, W. T. Lovins, and Robert B. Vining
Better SAFE than sorry
No full textCorey J.A. Bradshaw, Gopalasamy Reuben Clements, William F. Laurance and Barry W. Broo
Book Reviews
No full textBook Reviews by Brendan F. Brown, Laurance M. Hyde, Francis W. Johnston, W. T. Lovins, and Robert B. Vining
Laurance, W. F. & Peres, C. A. (eds). — Emerging threats to tropical forests. The University of Chicago Press, Chicago & London. 2006
No full textErard Christian. Laurance, W. F. & Peres, C. A. (eds). — Emerging threats to tropical forests. The University of Chicago Press, Chicago & London. 2006. In: Revue d'Écologie (La Terre et La Vie), tome 62, n°2-3, 2007. pp. 269-270
Climate change as a threat to the biodiversity of tropical rainforests in Australia
No full text[Extract] Forest destruction is thought to be the greatest threat to biodiversity in the tropics, particularly in the Amazon and tropical Asia (W. F. Laurance 1999). Climate change is sometimes discounted as a threat to tropical biotas and has been less studied in the tropics than in temperate, boreal,
and arctic ecosystems. However, climate change has already produced significant and measurable impacts on almost all ecosystems around the globe and has altered species distributions, the timing of biological behaviors, assemblage composition, ecological interactions, and community dynamics (L. Hughes 2000; Walther et al. 2002; Parmesan and Yohe 2003; Root et al. 2003, 2005; Pounds et al. 2006). Recent analyses based on bioclimatic-distribution modeling suggested that climate change is potentially a greater threat to global biodiversity, including that in many tropical ecosystems, than is habitat destruction (Thomas et al. 2004)
Prof. Th. W. Adorno and the author Hans Erich Nossack.
No full textProf. Th. W. Adorno and the author Hans Erich Nossack at a reception of Insel Verlag, Buchmesse Frankfurt 1966LB
Nowe spojrzenie na planowanie architektury mieszkaniowej w afryce subsaharyjskiej
No full textThe author shares his reflections on state of art in housing and urban planning, deficiencies, expectations and possibilities in the Sahel region of Africa. He notices, that the housing problem in Africa is one of the challenges, which should be solved in order to recover life dignity of African people and secure their rights to traditional family life in acceptable conditions. The paper describes the studies on the typical dispersed urban structures and the need to foster this type of settlement structure and proposals of introduction of new on light steel frame housing system in the area of Sahel, combining the traditional way of building houses with modern technology. The particularly analysed case, is the housing problem in the Republic of Chad. The author presents the basic discussion on this topic and his architectural proposals. Unfortunately, the gap between the needs and the financial feasibility of housing construction in this area, makes this project already at the starting point extremely difficult to be realized without external subventions.Problem mieszkaniowy w Afryce jest jednym z wyzwań, które należy rozwiązać, aby Afrykanie mogli odzyskać godność życiową i zabezpieczyć swoje prawa do tradycyjnego życia rodzinnego w akceptowalnych warunkach. W artykule opisano badania nad typowymi rozproszonymi strukturami miejskimi i potrzebą wspierania tego typu struktur osadniczych oraz propozycji wprowadzenia nowego systemu konstrukcji domów, opartym na lekkim szkielecie stalowym, łączącym tradycyjny sposób budowania domów z nowoczesną technologią. Przypadkiem szczególnie analizowanym jest problem mieszkaniowy w Republice Czadu. Autor przedstawia podstawową dyskusję na ten temat i swoje propozycje architektoniczne. Niestety luka między potrzebami mieszkaniowymi w Czadzie a finansową wykonalnością budownictwa mieszkaniowego w tym obszarze sprawia, że projekt ten, już w punkcie wyjścia, jest niezwykle trudny do realizacji bez uzyskania zewnętrznych dotacji
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