Leaf Area Density as an urban forestry planning and management tool

2000 ◽  
Vol 76 (2) ◽  
pp. 235-239 ◽  
Author(s):  
W. A. Kenney

Many of the benefits that we derive from urban forests are directly or indirectly related to the leaf area of the forest. If we are to consider these multiple benefits at the level of the forest, the use of Leaf Area Density (LAD) provides some advantages over other often used measures. Since many factors in the urban landscape can limit leaf area, Potential Leaf Area Density (PLAD) can provide a measure of the upper limit to leaf area density. Using these two measures, urban forest planners and managers can integrate many of the issues associated with broader aspects of the structure and benefits of the forest under their jurisdiction. Some planning, policy, and educational applications of LAD and PLAD are discussed. Key words: urban forestry management and planning, leaf area density

2006 ◽  
Vol 71 (603) ◽  
pp. 111-117
Author(s):  
Ai KADAIRA ◽  
Harunori YOSHIDA ◽  
Daisuke MURAKAMI ◽  
Mamiko ITOU

1982 ◽  
Vol 33 (2) ◽  
pp. 187 ◽  
Author(s):  
MM Ludlow ◽  
TH Stobbs ◽  
R Davos ◽  
DA Charles-Edwards

Our aim was to determine whether increasing the sward density of tropical pastures, for the purpose of enhancing the size of bite harvested by grazing cattle, would reduce yield by affecting light distribution andcanopy photosynthesis. The growth regulators (2-chloroethy1)trimethylammonium chloride (CCC) and gibberillic acid (GA) were used to alter the leaf area density of the tussock-forming grass Setavia sphacelata and of the sward-forming grass Digitaria decumbens. GA increased plant height, the length of stem internodes, and the size of bite harvested by cattle. On the other hand, CCC decreased canopy height, and increased leaf area density and bite size. The variation of leaf area density, investigated experimentally by using growth regulators (5-25 m-1) and theoretically by simulation modelling (5-40 m-1), had no significant effect on either leaf or canopy photosynthetic characteristics. Hence we believe that there would be a negligible reduction in yield of these tropical grasses if their leaf area densities were increased up to a value of 40 m-1, which exceeds those of temperate pastures. Such increases in leaf area density may increase animal production from tropical pastures where bite size limits daily intake of forage. The agricultural implications of the findings are discussed.


Author(s):  
João Carlos Castro Pena ◽  
Danilo Marques Magalhães ◽  
Ana Clara Mourão Moura ◽  
Robert John Young ◽  
Marcos Rodrigues

We mapped and described the composition of the urban vegetation that comprises the green infrastructure of a highly urbanized Neotropical city, and discussed how it can be used to preserve and maintain urban biodiversity. Almost half of our study area is occupied by 12 types of arboreal and herbaceous vegetation, composed mostly of urban parks, gardens and street trees. Forty-one percent of the almost 90,000 street trees are composed of 10 species with only 4 native species. These results show that this urban landscape is highly heterogeneous and has a great potential for biodiversity conservation. However, management strategies are needed, such as better planning of the urban forestry. This study is the first step towards a better understanding of how this landscape influences local biodiversity, and can be used as a management tool to increase urban resilience and functionality.


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