| Titre : | Biological Conservation 138(3-4) - SEP 2007 |
| Type de document : | Bulletin |
| Paru le : | 00/00/0000 |
Dépouillements
Article
William J. Ripple, Auteur ;
Robert L. Beschta, Auteur
Wolves (Canis lupus) were reintroduced to Yellowstone National Park in 1995-1996. We present data on a recent trophic cascade involving wolves, elk (Cervus elaphus), and aspen (Populus tremuloides) in Yellowstone's northern winter range that doc[...]
Article
Daniel J. Hocking, Auteur ;
Raymond D. Semlitsch, Auteur
Despite numerous studies showing reduced amphibian abundance and diversity following habitat modification, little is known about the mechanisms causing these observed patterns. We examined the effects of four experimental forest management treat[...]
Article
Paul H. Williams, Auteur ;
Miguel B. Araújo, Auteur ;
Pierre Rasmont, Auteur
Comparison of the two flagship species of British bumblebee conservation (Bombus distinguendus and B. sylvarum) with a widespread, common, and more stable species (B. pascuorum) shows (1) that the two rarer and range-declining species in Britain[...]
Article
C. Josh Donlan, Auteur ;
Karl Campbell, Auteur ;
Wilson Cabrera, Auteur ;
Christian Lavoie, Auteur ;
Victor Carrion, Auteur ;
Felipe Cruz, Auteur
Rails (family Rallidae) are vulnerable to the impacts of invasive mammals, and this is particularly true for species on oceanic islands. The endemic Galapagos rail (Laterallus spilonotus) is no exception; previous studies suggested that Galapago[...]
Article
Michael C. Goates, Auteur ;
Kent A. Hatcha, Auteur ;
Dennis L. Eggett, Auteur
A buffer zone of 30.5 m is commonly used to protect species in riparian and wetland systems. This 30.5 m standard was developed to protect water quality, not biodiversity, and few studies have tested its effectiveness for protecting riparian and[...]
Article
Sarah A. Millus, Auteur ;
Paul Stapp, Auteur ;
Paige Martin, Auteur
Predation by native deer mice (Peromyscus maniculatus elusus) is considered the greatest threat to nest success of Xantus's Murrelet (Synthliborarnphus hypoleucus scrippsi), a small, crevice-nesting seabird, on Santa Barbara Island, where about [...]
Article
Jill E. Jankowski, Auteur ;
Kerry N. Rabenold, Auteur
Species' rarity is expressed and measured at a variety of spatial scales, and rarity at different scales could be correlated. Considerable empirical evidence has supported a positive correlation between spatial distribution and local numerical a[...]
Article
Shawn J. Leroux, Auteur ;
Fiona K. A. Schmiegelow, Auteur ;
Robert B. Lessard, Auteur ;
Steve G. Cumming, Auteur
We introduce minimum dynamic reserves: a framework for the minimum reserve size required to incorporate natural disturbance and maintain ecological processes. The minimum dynamic reserve framework is a refinement of the minimum dynamic area conc[...]
Article
Fabio Attorre, Auteur ;
Fabio Francesconi, Auteur ;
Nadim Taleb, Auteur ;
Paul Scholte, Auteur ;
Ahmed Saed, Auteur ;
Marco Alfo, Auteur ;
Franco Bruno, Auteur
The potential impact of climate change on Dracaena cinnabari, a spectacular relict of the Mio-Pliocene Laurasian subtropical forest in Socotra (Yemen), was analysed. Current distribution, abundance and vertical structure of D. cinnabari populati[...]
Article
Peter B. Hardy, Auteur ;
Tim H. Sparks, Auteur ;
Nick J. B. Isaac, Auteur ;
Roger L. H. Dennis, Auteur
Specialism is a key issue in conserving organisms. Using a new database of consumer resources we investigate specialism among British butterflies. Different measures for the range of sources exploited by adults are compared. As number of nectar [...]
Article
Constance L. Browne, Auteur ;
Stephen J. Hecnar, Auteur
Changes to population and community structure can have important ecological consequences and raise conservation concerns when causes are anthropogenic; however, signs of stress may not always be apparent. Turtles are long-lived and presence of a[...]
Article
Alex I. James, Auteur ;
David J. Eldridge, Auteur
Substantial range declines of the greater bilby (Macrotis lagotis) and the burrowing bettong (Bettongia lesueur) are thought to have had dramatic effects on ecosystem processes in the Australian arid zone because of their impacts on surface soil[...]
Article
Jorge Lozano, Auteur ;
Emilio Virgos, Auteur ;
Sara Cabezas-Diaz, Auteur ;
Julian G. Mangas, Auteur
There are several factors that threaten wildcat (Fells silvestris) populations in Europe, including habitat destruction, direct persecution and genetic introgression from domestic cats. However, in contrast to other predatory species, lack of pr[...]
Article
Eduardo J. Naranjo, Auteur ;
Richard E. Bodmer, Auteur
Native ungulate species constitute an important source of protein for Mesoamerican subsistence hunters. In this study, we (1) provide evidence supporting the hypothesis that source-sink systems help maintain some of the ungulate populations in t[...]
Article
Teri E. Nicholson, Auteur ;
Karl A. Mayer, Auteur ;
Michelle M. Staedler, Auteur ;
Andrew B. Johnson, Auteur
Since 1984, Monterey Bay Aquarium's Sea Otter Research and Conservation (SORAC) program has treated more than 70 stranded newborn sea otter pups. Pups rehabilitated for release have been reared by methods that rely heavily on human care, contrib[...]
Article
Per Nystroem, Auteur ;
Johanna Hansson, Auteur ;
Jenny Mansson, Auteur ;
Moa Sundstedt, Auteur ;
Christian Reslow, Auteur ;
Anna Brostroem, Auteur
Amphibians are declining worldwide, but lack of long-term regional data makes identifying possible causes difficult, hindering conservation efforts. We evaluated whether habitat destruction, terrestrial habitat adjacent to ponds and the physico-[...]
Article
Andrew J. Davies, Auteur ;
J. Murray Roberts, Auteur ;
Jason Hall-Spencer, Auteur
Human activity in the deep sea is extending ever deeper, with recent research showing that this environment is more sensitive to human and natural impacts than previously thought. Some deep-water fish stocks have collapsed and fishing methods su[...]
Article
Douglas C. Woodhams, Auteur ;
Vance T. Vredenburg, Auteur ;
Mary-Alice Simon, Auteur ;
Dean Billheimer, Auteur ;
Bashar Shakhtour, Auteur ;
Yu Shyr, Auteur ;
Cheryl J. Briggs, Auteur ;
Louise A. Rollins-Smith, Auteur ;
Reid N. Harris, Auteur
Symbiotic microorganisms influence health and disease and may contribute to the innate immune defenses of amphibians. The mountain yellow-legged frog, Rana muscosa, is currently undergoing unprecedented population declines. One cause of recent d[...]
Article
Matthew A. Etterson, Auteur ;
Julie R. Etterson, Auteur ;
Francesca J. Cuthbert, Auteur
The composition of animal communities changes over time in response to natural processes (disease dynamics, plant community succession) and anthropogenic disturbances (habitat fragmentation, climate change). Detection and analysis of community c[...]
Article
James W. Petranka, Auteur ;
Elizabeth M. Harp, Auteur ;
C. Tate Holbrook, Auteur ;
Jennifer A. Hamel, Auteur
Although breeding habitats for amphibians are frequently created in restored wetlands, populations at restored sites often have no connectivity to neighboring populations and are vulnerable to site-wide extinctions. We conducted a 13-year study [...]
Article
Claude E. Steck, Auteur ;
Matthias Buergi, Auteur ;
Janine Bolliger, Auteur ;
Felix Kienast, Auteur ;
Anthony Lehmann, Auteur ;
Yves Gonseth, Auteur
Land-use change is a major driver for changes in biodiversity. In this study, we investigated how the objectives of two conservation strategies (large-scale conservation of species richness versus conservation of diversity hotspots) can be achie[...]
Article
Thomas N. E. Gray, Auteur ;
Hong Chamnan, Auteur ;
Ro Borey, Auteur ;
Nigel J. Collar, Auteur ;
Paul M. Dolman, Auteur
Low-intensity agro-ecosystems of the Tonle Sap grasslands, Cambodia, support important concentrations of threatened bird species including the largest global population of bengal florican (Houbaropsis bengalensis) (IUCN status Critically Endange[...]
Article
Nathan R. Franssen, Auteur ;
Keith B. Gido, Auteur ;
David L. Propst, Auteur
Understanding how altered flow regimes mediate interactions among native and nonnative species is necessary for the conservation of aquatic systems. Anthropogenic alteration of natural flows and establishment of nonnative fishes coincided with n[...]
