Management of Phytoplasmas in Urban Trees

2019 ◽  
pp. 181-201
Author(s):  
Liliana Franco-Lara ◽  
Laura Perilla-Henao
Keyword(s):  
Urban Trees

scholarly journals The Wood Quality of Small-Leaved Lime (Tilia cordata Mill.) Trees in an Urban Area: A Pilot Study

Forests ◽  
2021 ◽  
Vol 12 (4) ◽  
pp. 420
Author(s):  
Benas Šilinskas ◽  
Aistė Povilaitienė ◽  
Gintautas Urbaitis ◽  
Marius Aleinikovas ◽  
Iveta Varnagirytė-Kabašinskienė
Keyword(s):  
Urban Area ◽  
Urban Areas ◽  
Wood Quality ◽  
Wood Products ◽  
Urban Trees ◽  
Measuring System ◽  
Forest Site ◽  
Tilia Cordata ◽  
Mean Values ◽  
Wood Development

This study performed a pilot evaluation of the wood quality—defined by a single parameter: dynamic modulus of elasticity (MOEdyn, N mm−2)—of small-leaved lime (Tilia cordata Mill.) trees in urban areas. A search of the literature revealed few studies which examined the specifics of tree wood development in urban areas. Little is known about the potential of wood from urban trees wood of their suitability for the timber industry. In this study, an acoustic velocity measuring system was used for wood quality assessment of small-leaved lime trees. The MOEdyn parameter was evaluated for small-leaved lime trees growing in two urban locations (along the streets, and in an urban park), with an additional sample of forest sites taken as the control. MOEdyn was also assessed for small-leaved lime trees visually assigned to different health classes. The obtained mean values of MOEdyn of 90–120-year old small-leaved lime trees in urban areas ranged between 2492.2 and 2715.8 N mm−2. For younger trees, the values of MOEdyn were lower in the urban areas than in the forest site. Otherwise, the results of the study showed that the small-leaved lime wood samples were of relatively good quality, even if the tree was classified as moderately damaged (which could cause a potential risk to the community). Two alternatives for urban tree management can be envisaged: (1) old trees could be left to grow to maintain the sustainability of an urban area until their natural death, or (2) the wood from selected moderately damaged trees could be used to create wood products, ensuring long-term carbon retention.

scholarly journals The politics of urban trees: Tree planting is associated with gentrification in Portland, Oregon

2021 ◽  
Vol 124 ◽  
pp. 102387
Author(s):  
Geoffrey H. Donovan ◽  
Jeffrey P. Prestemon ◽  
David T. Butry ◽  
Abigail R. Kaminski ◽  
Vicente J. Monleon
Keyword(s):  
Urban Trees ◽  
Tree Planting

scholarly journals Towards sustainable management of the stock and ecosystem services of urban trees. From theory to model and application

Trees ◽  
2021 ◽  
Author(s):  
H. Pretzsch ◽  
A. Moser-Reischl ◽  
M. A. Rahman ◽  
S. Pauleit ◽  
T. Rötzer
Keyword(s):  
Ecosystem Services ◽  
Carbon Sequestration ◽  
Leaf Area ◽  
Ecosystem Service ◽  
Sustainable Management ◽  
Environmental Changes ◽  
Urban Trees ◽  
Urban Tree ◽  
Age Class ◽  
Sustainable Planning

Abstract Key message A model for sustainable planning of urban tree stocks is proposed, incorporating growth, mortality, replacement rates and ecosystem service provision, providing a basis for planning of urban tree stocks. Abstract Many recent studies have improved the knowledge about urban trees, their structures, functions, and ecosystem services. We introduce a concept and model for the sustainable management of urban trees, analogous to the concept of sustainable forestry developed by Carl von Carlowitz and others. The main drivers of the model are species-specific tree diameter growth functions and mortality rates. Based on the initial tree stock and options for the annual replanting, the shift of the distribution of the number of trees per age class can be predicted with progressing time. Structural characteristics such as biomass and leaf area are derived from tree dimensions that can be related to functions such as carbon sequestration or cooling. To demonstrate the potential of the dynamic model, we first show how different initial stocks of trees can be quantitatively assessed by sustainability indicators compared to a target stock. Second, we derive proxy variables for ecosystem services (e.g. biomass for carbon sequestration, leaf area for deposition and shading) from a given distribution of the number of trees per age class. Third, we show by scenario analyses how selected ecosystem services and functions may be improved by combining complementary tree species. We exercise one aspect (cooling) of one ecosystem service (temperature mitigation) as an example. The approach integrates mosaic pieces of knowledge about urban trees, their structures, functions, and resulting ecosystem services. The presented model makes this knowledge available for a sustainable management of urban tree stocks. We discuss the potential and relevance of the developed concept and model for ecologically and economically sustainable planning and management, in view of progressing urbanization and environmental changes.

scholarly journals Root adaptation of urban trees to a more precise irrigation system: Mature olive as a case study

2021 ◽  
Vol 60 ◽  
pp. 127053
Author(s):  
Fahime Mohamadzade ◽  
Mahdi Gheysari ◽  
Mina Kiani
Keyword(s):  
Irrigation System ◽  
Urban Trees

Estimating NOx removal capacity of urban trees using stable isotope method: A case study of Beijing, China

2021 ◽  
Vol 290 ◽  
pp. 118004
Author(s):  
Cheng Gong ◽  
Chaofan Xian ◽  
Bowen Cui ◽  
Guojin He ◽  
Mingyue Wei ◽  
...  
Keyword(s):  
Stable Isotope ◽  
Urban Trees ◽  
Nox Removal ◽  
Removal Capacity ◽  
Isotope Method ◽  
Beijing China

scholarly journals Rainfall interception by six urban trees in San Juan, Puerto Rico

2018 ◽  
Vol 22 (1) ◽  
pp. 103-115 ◽  
Author(s):  
Christopher J. Nytch ◽  
Elvia J. Meléndez-Ackerman ◽  
María-Eglée Pérez ◽  
Jorge R. Ortiz-Zayas
Keyword(s):  
Puerto Rico ◽  
Urban Trees ◽  
San Juan ◽  
Rainfall Interception
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