Nutrient dynamics and development of soil fauna in vegetated roofs with the focus on biochar amendment
The impacts of biochar amendment on the quality and quantity of runoff, substrate properties and soil fauna in two types of experimental vegetated roofs (‘plantings’ and ‘mats’) were examined during a 7-year period in southern Finland. Biochar reduced the leaching of phosphorus (P) in both plantings...
| Main Authors: | , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2021-12-01
|
| Series: | Nature-Based Solutions |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S277241152100001X |
| _version_ | 1818393172869382144 |
|---|---|
| author | Kirsi Kuoppamäki Heikki Setälä Marleena Hagner |
| author_facet | Kirsi Kuoppamäki Heikki Setälä Marleena Hagner |
| author_sort | Kirsi Kuoppamäki |
| collection | DOAJ |
| description | The impacts of biochar amendment on the quality and quantity of runoff, substrate properties and soil fauna in two types of experimental vegetated roofs (‘plantings’ and ‘mats’) were examined during a 7-year period in southern Finland. Biochar reduced the leaching of phosphorus (P) in both plantings, which were established with seeds of meadow plants in a 100-mm-thick crushed brick mixture as growth medium, and mats comprising a 40-mm-thick layer of pregrown vegetation on a 60-mm-thick crushed brick mixture. Biochar reduced nitrogen (N) leaching only in plantings, where it positively impacted the plant cover. Nutrient loads declined with ageing of the roofs, but elevated P loads were measured following fertilization 6 years after establishment, with no mitigating impact of biochar on P leaching. Fertilization did not affect plant cover. Although nutrient loads from nonvegetated roofs were lower than from vegetated roofs in individual rain events, the difference in cumulative annual loads between vegetated and nonvegetated roofs was narrowed down by the high rainfall retention by vegetated roofs. Neither biochar amendment nor substrate organic matter content had any consistent impacts on the numbers and stability of soil fauna. Despite the extreme abiotic conditions in the vegetated roofs, the soil animal communities were unexpectedly diverse, with high population densities. |
| first_indexed | 2024-12-14T05:41:06Z |
| format | Article |
| id | doaj.art-347b679c81fc4960bce47b3485666ee4 |
| institution | Directory Open Access Journal |
| issn | 2772-4115 |
| language | English |
| last_indexed | 2024-12-14T05:41:06Z |
| publishDate | 2021-12-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Nature-Based Solutions |
| spelling | doaj.art-347b679c81fc4960bce47b3485666ee42022-12-21T23:15:01ZengElsevierNature-Based Solutions2772-41152021-12-011100001Nutrient dynamics and development of soil fauna in vegetated roofs with the focus on biochar amendmentKirsi Kuoppamäki0Heikki Setälä1Marleena Hagner2Faculty of Biological and Environmental Sciences, Ecosystems and Environment Research Programme, University of Helsinki, Niemenkatu 73, Lahti FIN-15140, Finland; Corresponding author.Faculty of Biological and Environmental Sciences, Ecosystems and Environment Research Programme, University of Helsinki, Niemenkatu 73, Lahti FIN-15140, FinlandFaculty of Biological and Environmental Sciences, Ecosystems and Environment Research Programme, University of Helsinki, Niemenkatu 73, Lahti FIN-15140, Finland; Plant Health, Natural Resources Institute Finland (Luke), Jokioinen 31600, FinlandThe impacts of biochar amendment on the quality and quantity of runoff, substrate properties and soil fauna in two types of experimental vegetated roofs (‘plantings’ and ‘mats’) were examined during a 7-year period in southern Finland. Biochar reduced the leaching of phosphorus (P) in both plantings, which were established with seeds of meadow plants in a 100-mm-thick crushed brick mixture as growth medium, and mats comprising a 40-mm-thick layer of pregrown vegetation on a 60-mm-thick crushed brick mixture. Biochar reduced nitrogen (N) leaching only in plantings, where it positively impacted the plant cover. Nutrient loads declined with ageing of the roofs, but elevated P loads were measured following fertilization 6 years after establishment, with no mitigating impact of biochar on P leaching. Fertilization did not affect plant cover. Although nutrient loads from nonvegetated roofs were lower than from vegetated roofs in individual rain events, the difference in cumulative annual loads between vegetated and nonvegetated roofs was narrowed down by the high rainfall retention by vegetated roofs. Neither biochar amendment nor substrate organic matter content had any consistent impacts on the numbers and stability of soil fauna. Despite the extreme abiotic conditions in the vegetated roofs, the soil animal communities were unexpectedly diverse, with high population densities.http://www.sciencedirect.com/science/article/pii/S277241152100001XGreen roofGreen-roof substratesUrban runoffStormwater qualitySoil fauna |
| spellingShingle | Kirsi Kuoppamäki Heikki Setälä Marleena Hagner Nutrient dynamics and development of soil fauna in vegetated roofs with the focus on biochar amendment Nature-Based Solutions Green roof Green-roof substrates Urban runoff Stormwater quality Soil fauna |
| title | Nutrient dynamics and development of soil fauna in vegetated roofs with the focus on biochar amendment |
| title_full | Nutrient dynamics and development of soil fauna in vegetated roofs with the focus on biochar amendment |
| title_fullStr | Nutrient dynamics and development of soil fauna in vegetated roofs with the focus on biochar amendment |
| title_full_unstemmed | Nutrient dynamics and development of soil fauna in vegetated roofs with the focus on biochar amendment |
| title_short | Nutrient dynamics and development of soil fauna in vegetated roofs with the focus on biochar amendment |
| title_sort | nutrient dynamics and development of soil fauna in vegetated roofs with the focus on biochar amendment |
| topic | Green roof Green-roof substrates Urban runoff Stormwater quality Soil fauna |
| url | http://www.sciencedirect.com/science/article/pii/S277241152100001X |
| work_keys_str_mv | AT kirsikuoppamaki nutrientdynamicsanddevelopmentofsoilfaunainvegetatedroofswiththefocusonbiocharamendment AT heikkisetala nutrientdynamicsanddevelopmentofsoilfaunainvegetatedroofswiththefocusonbiocharamendment AT marleenahagner nutrientdynamicsanddevelopmentofsoilfaunainvegetatedroofswiththefocusonbiocharamendment |