نتایج جستجو برای: multi species forests

تعداد نتایج: 1027675  

2013
Nilesh Timilsina Wendell P. Cropper Francisco J. Escobedo Joanna M. Tucker Lima

Managing forests for multiple ecosystem services such as timber, carbon, and biodiversity requires information on ecosystem structure and management characteristics. National forest inventory data are increasingly being used to quantify ecosystem services, but they mostly provide timber management and overstory data, while data on understory shrub and herbaceous diversity are limited. We obtain...

Journal: :Revista iberoamericana de micologia 2015
Natalia Allegrucci Ana María Bucsinszky Marcelo Arturi Marta Noemí Cabello

BACKGROUND Xeric forests dominated by two tree species, Scutia buxifolia (Rhamnaceae) and Celtis tala (Ulmacea), are temperate, semi-deciduous wooded communities that represent the most abundant woodlands on the eastern plains of Buenos Aires Province, Argentina. The district of Magdalena has one of the most well-preserved native-forest areas, with an environmental heterogeneity that gives rise...

2001
LEE HSIANG

1. Bees are believed to be dominant pollen vectors in tropical forests, yet studies specific to bees in south-east Asia are rare. Regeneration and restoration of the rapidly disappearing lowland forests of this region are reliant on bees, thus there is an urgent need for forest bee data at the community level. 2. Bee communities of eight forested sites in Johor (Malaysia) and Singapore were sur...

Journal: :Global change biology 2015
Stefano Leonardi Federico Magnani Angelo Nolè Twan Van Noije Marco Borghetti

We present a global assessment of the relationships between the short-wave surface albedo of forests, derived from the MODIS satellite instrument product at 0.5° spatial resolution, with simulated atmospheric nitrogen deposition rates (Ndep ), and climatic variables (mean annual temperature Tm and total annual precipitation P), compiled at the same spatial resolution. The analysis was performed...

2008
David B. McWethy Andrew J. Hansen Jacob P. Verschuyl

We hypothesized that edge density more strongly influences species abundances in more productive environments. To test this hypothesis we collected songbird point count data across broad biophysical gradients and gradients in forest patch edge density in thewest and east slopes of the CascadeMountains of Oregon and Washington, U.S.A., which differ in ecological productivity. We then analyzed bi...

2011
Margaret M. Carreiro Tara L. E. Trammell

Urban forests adjacent to interstate corridors are understudied ecosystems across cities. Despite their small area, these forests may be strategically located to provide large ecosystem services due to their ability to act as a barrier against air pollutants and noise as well as to provide flood control. The woody vegetation composition and structure of forests adjacent to urban interstates is ...

2014
JEAN-PAUL KENNEDY STEPHEN C. SILLETT JOSEPH M. SZEWCZAK

Sampling in forests across the world has revealed clear variation in bat use across the height gradient from ground level, up through the canopy, and above the tallest trees (Francis, 1994; Bradshaw, 1996; Kalcounis et al., 1999; Hayes and Gruver, 2000; Bernard, 2001; Henry et al., 2004; Menzel et al., 2005; Pereira et al., 2010). The ways bats distribute their activities along this vertical gr...

2015
Perpetra Akite Richard J Telford Paul Waring Anne M Akol Vigdis Vandvik

Forest-dependent biodiversity is threatened throughout the tropics by habitat loss and land-use intensification of the matrix habitats. We resampled historic data on two moth families, known to play central roles in many ecosystem processes, to evaluate temporal changes in species richness and community structure in three protected forests in central Uganda in a rapidly changing matrix. Our res...

2009
BRUCE MCCUNE

MCCUNE, B., and T. F. H. ALLEN. 1985. Will similar forests develop on similar sites? Can. J. Bot. 63: 367-376. Abies grandis, Taxus brevifolia, Thuja plicata, or any combination of these may dominate old-growth mesic forests of the Bitterroot Canyons, western Montana. Similar sites need not develop similar, relatively stable forests. This is shown by (i) anomalous distributional patterns of tre...

2012
Dunmei Lin Jiangshan Lai Helene C. Muller-Landau Xiangcheng Mi Keping Ma

The subtropical forest biome occupies about 25% of China, with species diversity only next to tropical forests. Despite the recognized importance of subtropical forest in regional carbon storage and cycling, uncertainties remain regarding the carbon storage of subtropical forests, and few studies have quantified within-site variation of biomass, making it difficult to evaluate the role of these...

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