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The Residential Urban Forest: Linking structure, function and management.

机译：住宅城市森林：链接结构，功能和管理。

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摘要

Vegetation provides a suite of ecosystem functions (e.g., carbon storage) which are partially determined by the forest structure. In urbanizing regions, homeowners play a key role in shaping the structure of the urban forest because residential land is the dominant land use. As cities expand, the influence of single-family residents' land management on urban forest structure and function will increase because most new urban development is in this land use. Yet, we know little about the structure, functions, and dynamics of highly managed residential parcels.;I focus on the Seattle Metropolitan Region to examine the patterns of urban forest that emerge from the interactions between biophysical factors and backyard land management attitudes of homeowners and the implications for current and future carbon storage. I use urban gradient analysis and plant functional trait classification systems to (1) characterize the forest structure on single-family residential lots in urban and suburban areas, (2) investigate factors associated with decisions to plant or remove trees and how these management actions have altered and will continue to transform the forest structure over time, and (3) estimate the current and future carbon storage benefits based on reported management actions and considerations. I use two functional plant traits---height potential at maturity and leaf senescence---selected based on their sensitivity to management decisions and for their role in controlling ecological functions (e.g., carbon cycling).;Suburban parcels had more trees than those in the urban area. However, after accounting for parcel size there was no significant difference in tree densities. Compared to suburban residences, urban residential landscapes have significantly fewer trees with large size potential and more deciduous trees with small size potential. Trees with large size potential contribute the majority of the carbon storage benefits, consequently urban residential landscapes store less carbon (as aboveground plant biomass). Surprisingly, the tree planting and removal activities of residents during their tenure resulted in no significant change in tree density. However, increase in total carbon storage in suburban lots will be insignificant from the expected increase in small deciduous trees.
机译：植被提供了一整套生态系统功能（例如碳储存），部分功能由森林结构决定。在城市化地区，房主在塑造城市森林结构中起着关键作用，因为住宅用地是主要的土地利用方式。随着城市的扩张，单身居民的土地管理对城市森林结构和功能的影响将增加，因为大多数新的城市发展都在这种土地利用中。但是，我们对高度管理的住宅用地的结构，功能和动态知之甚少。我重点研究西雅图大都市区，以研究生物物理因素与房主和后院土地管理态度之间相互作用产生的城市森林格局。对当前和未来碳储存的影响。我使用城市梯度分析和植物功能性状分类系统来（1）表征城市和郊区单户住宅区的森林结构，（2）调查与植树或砍伐树木的决定相关的因素以及这些管理措施如何改变，并将随着时间的推移继续改变森林结构，（3）根据报告的管理措施和考虑因素，估算当前和未来的碳储存收益。我使用了两个功能性植物特征-成熟时的身高潜力和叶片衰老-根据它们对管理决策的敏感性以及它们在控制生态功能中的作用（例如碳循环）进行选择。郊区的树木比那些树木多在市区。但是，考虑到宗地大小后，树木密度没有显着差异。与郊区住宅相比，城市住宅景观具有较大潜力的树木明显较少，而具有较小规模的落叶树木则更多。具有大潜力的树木贡献了大部分的碳储存优势，因此，城市住宅景观储存的碳较少（与地上植物的生物量一样）。出人意料的是，居民在任期内的植树和采伐活动并未导致树木密度的显着变化。但是，从郊区预计的小落叶乔木的增加来看，郊区地段的总碳存储量将微不足道。

著录项

  • 作者

    Tenneson, Karis.;

  • 作者单位

    University of Washington.;

  • 授予单位 University of Washington.;
  • 学科 Agriculture Urban Forestry.;Environmental Sciences.;Urban and Regional Planning.
  • 学位 Ph.D.
  • 年度 2013
  • 页码 187 p.
  • 总页数 187
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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