Woodlands Articles
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Forests at work: A new model for local land protection
To date, traditional public land acquisition programs have played a relatively small role in the conservation and sustainable management of southern U.S. forests. The South trails behind other U.S. regions in both the percent of the land base and the acres per capita conserved in parks, wildlife refuges, wilderness, and other protective categories. Working forests offer a new model for scaling ...
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Forests at work: A new model for local land protection
To date, traditional public land acquisition programs have played a relatively small role in the conservation and sustainable management of southern U.S. forests. The South trails behind other U.S. regions in both the percent of the land base and the acres per capita conserved in parks, wildlife refuges, wilderness, and other protective categories. Working forests offer a new model for scaling ...
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Earth out of sync rising temperatures throwing off seasonal timing
A newly hatched chick waits with hungry mouth agape for a parent to deliver its first meal. A crocus peaks up through the snow. Rivers flow swiftly as ice breaks up and snows melt. Sleepy mammals emerge from hibernation, and early frog songs penetrate the night. Spring awakening has long provided fodder for poets, artists, and almanac writers. Even for a notoriously fickle time of sunshine, ...
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Economic implications of different cork oak forest management systems
The agro-silvopastoral system 'montado' is mostly dominated by Mediterranean evergreen oaks such as, cork oak (Quercus suber L.) and holm oak (Quercus rotundifolia). The 'montado' production system management aims the maintenance of a balanced sustainable land use to cope with the Mediterranean climate variability. One important issue in cork oak forests is the control shrub growth in order to ...
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Charcoal distribution affects Carbon and Nitrogen contents in forest soils of California
Fire is the dominant natural disturbance regime in most ecosystems of California. The long-term relict of fire is charcoal, which has been shown to increase N mineralization and also represents a pool of chemically stabilized C whose quantity and spatial distribution have not been well characterized in forest soils. We examined the charcoal content in three different ecosystems of the Sierra ...
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Evidence of active biotic influences in pedogenetic processes. Case studies from semiarid ecosystems of south-west Western Australia
Abstract Soil profiles and rooting morphologies were examined under an ecotone where open woodland of multi-stemmed, small, lignotuberous eucalypts (mallee) graded into proteaceous heath. Soils under the mallee showed a Solonetz-type seal which separated, hydrologically, the upper acidic horizon of bleached sand from lower alkaline horizons rich in calcrete, silcrete, finely divided ...
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Effects of fragmentation and trampling on carabid beetle assemblages in urban woodlands in Helsinki, Finland
We studied the effects of fragmentation (edge effects and patch size) and trampling (path cover) on carabid beetle assemblages in urban woodland patches in Helsinki, Finland. We expected that (1) open habitat and generalist species would benefit and forest species would suffer from increased woodland fragmentation, and (2) most carabid species would respond negatively to increased levels of ...
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Distribution of neotropical migratory bird species across an urbanizing landscape
Urbanization leads to long-term modification of landscapes by habitat loss, fragmentation, and the creation of new habitats. Species’ distributions respond to these modifications of habitat availability, but the combination of parameters and scale at which habitat alteration most strongly influences species distributions is poorly understood. We evaluated responses of neotropical migratory birds, ...
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Relative Importance of Environmental Stress and Herbivory in Reducing Litter Fall in a Semiarid Woodland
We examined the impact of soil stress (low water and nutrient availabilities) and two keystone insect herbivores on pinyon pine (Pinus edulis) needle litterfall. We compared trees growing on two distinct soil types: volcanic cinders, which exhibit pronounced water and nutrient limitation, and sandy-loam soils, which have higher water-storage capacity and nutrient availability. Using two long-term ...
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Canopy dynamics and human caused disturbance on a semi-arid landscape in the Rocky Mountains, USA
Invasion of grasslands by woody plants has been identified as a key indicator of changes in ecosystem structure and function in arid and semi-arid rangelands throughout the world. We investigated changes in the balance between woody and herbaceous components of a semi-arid landscape in western Colorado (USA) using historical aerial photography. Aerial photographs from 1937, 1965–67, and 1994 were ...
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Soil Microbial Community Response to Land Use Change in an Agricultural Landscape of Western Kenya
Tropical agroecosystems are subject to degradation processes such as losses in soil carbon, nutrient depletion, and reduced water holding capacity that occur rapidly resulting in a reduction in soil fertility that can be difficult to reverse. In this research, a polyphasic methodology has been used to investigate changes in microbial community structure and function in a series of tropical soils ...
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