John A. Allen

John A. Allen
  • Master of Engineering
  • PhD Student at University of Helsinki

About

9
Publications
4,171
Reads
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306
Citations
Introduction
I received my BS in Geology from the University of Georgia, USA in 2002, and then worked for nearly ten years in the environmental regulatory and compliance field in the US. I received my Master’s degree in engineering (2016) from the Lahti University of Applied Sciences where I completed my thesis examining the retention of PAHs in snow disposal sites. I began my PhD studies in the University of Helsinki in 2018, where my research focuses on the impact of domestic dogs in urban greenspaces.
Current institution
University of Helsinki
Current position
  • PhD Student
Additional affiliations
January 2018 - present
University of Helsinki
Position
  • PhD Student
May 2014 - June 2017
University of Helsinki
Position
  • Research Assistant
Education
February 2014 - December 2016
Lahti University of Applied Sciences
Field of study
  • Environmental technoloy, urban planning and sustainability
August 1998 - May 2002
University of Georgia
Field of study
  • Geology

Publications

Publications (9)
Article
Full-text available
Bioremediation by in situ biostimulation is an attractive alternative to excavation of contaminated soil. Many in situ remediation methods have been tested with some success; however, due to highly variable results in realistic field conditions, they have not been implemented as widely as they might deserve. To ensure success, methods should be val...
Experiment Findings
Two cities in Finland were included in this study: (1) Helsinki (60°10′15″N 24°56′15″E), population ca. 650 000; and (2) Lahti (60°59′N 025°39′E), population 120 000 (see Setälä et al., 2016 for additional details regarding these localities). Thirty-four sites were selected (Helsinki n = 18, Lahti n = 16), grouped into three typologies: Parks (n =...
Article
Full-text available
Urban residents and their pets utilize urban greenspaces daily. As urban dog ownership rates increase globally, urban greenspaces are under mounting pressure even as the benefits and services they provide become more important. The urine of dogs is high in nitrogen (N) and may represent a significant portion of the annual urban N load. We examined...
Article
Plant functional type influences the abundance and distribution of soil biota. With time, as root systems develop, such effects become more apparent. The relationship of plant type and time with the structure and abundance of soil microbial and invertebrate communities has been widely investigated in a variety of systems. However, much less is know...
Book
Full-text available
This document presents examples of success stories of remediation of contaminated soils in various contexts and different European countries. It is not meant to provide an exhaustive inventory of remediated sites in all countries. Eight countries present a total of 17 cases which illustrate how soil and brownfields remediation along with sustainabl...
Article
Urban greenspaces provide ecosystem services like more natural ecosystems do. For instance, vegetation modifies soil properties, including pH and soil organic matter content, yet little is known about its effect on metals. We investigated whether the accumulation and mobility of heavy metals, nutrients and carbon is affected by plant functional typ...
Thesis
Full-text available
Polycyclic aromatic hydrocarbons (PAHs) are a ubiquitous class of environmental micropollutants produced by combustion processes. They are commonly produced in urban areas by vehicles and from road dust. The United States Environmental Protection Agency (EPA) has included 16 PAHs (PAH16) on their list of Priority Pollutants. During the winter in no...
Article
Full-text available
Urban green spaces provide ecosystem properties fundamental to the provision of ecosystem services, such as the sequestration of carbon and nutrients and serving as a reservoir for organic matter. Although, urban vegetation influences soil physico-chemical properties, it remains unknown whether ecosystem properties depend on plant species portfolio...

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