Treesearch

The walnut twig beetle, Pityophthorus juglandis Blackman, and its fungal associate Geosmithia morbida Kolařík et al., produce thousand cankers disease, which has devastated black walnut (Juglans nigra L.) in several states of the western U.S.A. To better understand beetle flight dynamics and life history, flight times were documented in the urban corridor along the Colorado Front Range during 2 years - in 2008 with yellow sticky card traps and in 2012 with baited multiple funnel traps. Walnut twig beetles were determined to be active throughout the trapping season from March through...

Combustion performance for three types of wood–aluminum composites was investigated using cone calorimetry tests. The results revealed that time to ignition of the specimens was increased and more than 100 times after the lamination of 1.6-mm-thick aluminum alloy sheet on the surface (from 17 to 1990 s). And residual mass of the wood–aluminum composites was improved and almost quadrupled (from 21.795% to 81.664%). The peak heat release rate, average heat release rate, total heat release, and mean mass loss rate of wood–aluminum composites with 1.6-mm-thick aluminum alloy sheet on the...

The Forest Products Annual Market Review 2016-2017 provides a comprehensive analysis of markets in the UNECE region and reports on the main market influences outside the UNECE region. It covers the range of products from the forest to the end-user: from roundwood and primary processed products to value-added and housing. Statistics-based chapters analyse the markets for wood raw materials, sawn softwood, sawn hardwood, wood-based panels, paper, paperboard and woodpulp. Other chapters analyse policies, forest products trade barriers affecting the UNECE region, and markets for wood energy....

Trees in cities can contribute significantly to human health and environmental quality. In 2002, there were an estimated 26.9 million trees (36.9 trees / acre) within non-forested urban areas in Wisconsin. In 2012, the non-forest urban areas were reassessed based on 185 field plots. Urban forest attributes changed between 2002 and 2012 due, in part, to the expansion of urban areas, but also tree planting and natural regeneration, tree growth and tree mortality. Based on the 2012 data, urban forest structure, functions, health, and values in non-forest urban areas in Wisconsin (i.e.,...

This article discusses four features of islands that make them places of special importance to environmental conservation. First, investment in island conservation is both urgent and cost-effective. Islands are threatened hotspots of diversity that concentrate unique cultural, biological and geophysical values, and they form the basis of the livelihoods of millions of islanders. Second, islands are paradigmatic places of human–environment relationships. Island livelihoods have a long tradition of existing within spatial, ecological and ultimately social boundaries and are still often...

This plant profile for Lepidospartum squamatum provides information on species distribution; taxonomic relationships; ecological and evolutionary considerations for restoration; growth form and distinguishing traits; habitat characteristics; projected future suitable habitat; growth, reproduction and dispersal; biological interactions; ecological genetics; seed characteristics, germination requirements and processing; and plant uses including agriculture, restoration, and traditional products, plus an extensive bibliography. It is part of Riverside-Corona Resource Conservation District's...

This plant profile for Malosma laurina provides information on species distribution; taxonomic relationships; ecological and evolutionary considerations for restoration; growth form and distinguishing traits; habitat characteristics; projected future suitable habitat; growth, reproduction and dispersal; biological interactions; ecological genetics; seed characteristics, germination requirements and processing; and plant uses including agriculture, restoration, and traditional products, plus an extensive bibliography. It is part of Riverside-Corona Resource Conservation District's resource...

This plant profile for Rhus ovata provides information on species distribution; taxonomic relationships; ecological and evolutionary considerations for restoration; growth form and distinguishing traits; habitat characteristics; projected future suitable habitat; growth, reproduction and dispersal; biological interactions; ecological genetics; seed characteristics, germination requirements and processing; and plant uses including agriculture, restoration, and traditional products, plus an extensive bibliography. It is part of Riverside-Corona Resource Conservation District's resource...

This plant profile for Salvia apiana provides information on species distribution; taxonomic relationships; ecological and evolutionary considerations for restoration; growth form and distinguishing traits; habitat characteristics; projected future suitable habitat; growth, reproduction and dispersal; biological interactions; ecological genetics; seed characteristics, germination requirements and processing; and plant uses including agriculture, restoration, and traditional products, plus an extensive bibliography. It is part of Riverside-Corona Resource Conservation District's resource...

This updated plant profile for Salvia mellifera provides information on species distribution; taxonomic relationships; ecological and evolutionary considerations for restoration; growth form and distinguishing traits; habitat characteristics; projected future suitable habitat; growth, reproduction and dispersal; biological interactions; ecological genetics; seed characteristics, germination requirements and processing; and plant uses including agriculture, restoration, and traditional products, plus an extensive bibliography. It is part of Riverside-Corona Resource Conservation District's...