This paper presents simulations of long-term competition for light between two plant species, oaks and beeches. These artificial plants, evolving in a 3D environment, are based on a multi-agent model. Natural oaks and beeches develop two different strategies to exploit light. The model presented in this paper uses these properties during the plant growth. Most of the results are close to those ...

J. Giralt1, J.M. Trigo2, S. Nuyts3, E.M. Ozsahin4, K. Skladowski5, G. Hatoum6, J. Daisne7, A. Zhang8, K. Oliner9, A. Vanderwalde10 Radiation Oncology, Vall d`Hebron University Hospital, Barcelona, SPAIN, Medical Oncology, Hospital Universitario Virgen de la Victoria, Malaga, SPAIN, Radiation Oncology, University Hospitals Leuven, Leuven, BELGIUM, Radiation Oncology, Lausanne University Medical ...

Abandoned management has caused many sites with free-standing, large oaks (Quercus robur) to become more shaded. This study shows how forest regrowth affects beetle species associated with old oaks in south-eastern Sweden. Beetles were trapped by pitfall traps placed in hollows and window traps placed near hollows in oak trunks in pasture woodlands. We assessed the influence of forest regrowth,...

The genus Quercus is one of the most important clades of woody angiosperms in the northern hemisphere in terms of species diversity, ecological dominance, and economic value. Oaks are dominant members of a wide variety of habitats, including temperate deciduous forest, temperate and subtropical evergreen forest, subtropical and tropical savannah, subtropical woodland, oak-pine forest, oak-’piño...

Over the past centuries, humans have transformed large parts of the biosphere, and there is a growing need to understand and predict the distribution of biodiversity hotspots influenced by the presence of humans. Our basic hypothesis is that human influence in the Anthropocene is ubiquitous, and we predict that biodiversity hot spot modeling can be improved by addressing three challenges raised...

Abstract The oak (Quercus) species of eastern North America are declining in abundance, threatening the many socioecological benefits they provide. We discuss mechanisms responsible for their loss, which rooted prevailing view that oaks drought tolerant. then synthesize previously published data to comprehensively review response strategies US oaks, concluding whether or not tolerant depends fi...

Historically, oak forests and woodlands intergraded with southern boreal forest, temperate mesic forest, and grassland biomes, forming complex fire-mediated relationships in the Great Lakes region of Minnesota, Wisconsin, and Michigan, USA. Variability in fire recurrence intervals allowed oaks to mix with grasses or with mesic forest species in areas with high (2–10 yr) or moderate (several dec...

We investigated the geographical ecology of acorn woodpeckers (Melanerpes formicivorus) using 30 years of Audubon Christmas Bird Counts and data on the diversity and abundance of oaks. Spatial autocorrelation in acorn woodpecker population densities is not significantly greater than zero both in either the southwestern United States, where populations are often locally isolated, or along the Pa...

Together with Joseph Gall and Hewson Swift, David Prescott was among the first to recognize the vast potential of protozoan ciliates for studies of chromosome biology. He went on to discover the phenomenon of macronuclear genome reduction and this nucleus’ selective gene amplification and led the way in early studies of telomeres, this latter work setting the stage for the later exciting era of...

SHELTON, M. Cl. AND M. D. CAIN (USDA Forest Service, Southern Research Station, Monticello, AR 716563516). Structure and short-term dynamics of the tree component of a mature pine-oak forest in southeastern Arkansas. J. Torrey Bot. Sot. 126:32-48. 1999.-The R.R. Reynolds Research Natural Area is a 32.ha secondgrowth forest with little human intervention for nearly 60 years. In this paper, we ch...