Prescribed Burning as A Management Tool to Destroy Dry Seeds of Invasive Conifers in Heathland in Denmark
Non-indigenous conifers are considered invasive to the coastal dune heathland in Denmark, and massive clearing is carried out in an attempt to recreate and keep the original heathland. Burning is a common method for managing, but its feasibility to control the seed bank of conifers has not been inve...
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| Format: | Article |
| Language: | English |
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MDPI AG
2020-11-01
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| Series: | Land |
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| Online Access: | https://www.mdpi.com/2073-445X/9/11/432 |
| _version_ | 1797548850534154240 |
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| author | Christian Andreasen Kasper Rossing Christian Ritz |
| author_facet | Christian Andreasen Kasper Rossing Christian Ritz |
| author_sort | Christian Andreasen |
| collection | DOAJ |
| description | Non-indigenous conifers are considered invasive to the coastal dune heathland in Denmark, and massive clearing is carried out in an attempt to recreate and keep the original heathland. Burning is a common method for managing, but its feasibility to control the seed bank of conifers has not been investigated. This project shows that the burning of logged conifer trees will often eliminate seeds of lodgepole pine, mugo pine and Sitka spruce, even when the seeds were placed into a depth of five centimeters in the soil. The effect on seeds depends on the fuel load and the fire conditions (e.g., dryness, wind, and temperature). If the seeds were exposed to a high temperature, the seeds were not able to germinate afterward. The temperature was about 80 °C for all species. If the sum of temperatures based on temperature records every 30 s exceeded between 12,000 and 14,000 °C no seeds were able to germinate. The relationship between the mean temperature of the burns and the germination rate at seeds placed in various soil depths was modelled. Findings should be interpreted cautiously as each depth-species combinations were not replicated in space or time due to practical constraints. |
| first_indexed | 2024-03-10T15:05:39Z |
| format | Article |
| id | doaj.art-f9e78feac44441a093d87a0d9d4785fb |
| institution | Directory Open Access Journal |
| issn | 2073-445X |
| language | English |
| last_indexed | 2024-03-10T15:05:39Z |
| publishDate | 2020-11-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Land |
| spelling | doaj.art-f9e78feac44441a093d87a0d9d4785fb2023-11-20T19:48:33ZengMDPI AGLand2073-445X2020-11-0191143210.3390/land9110432Prescribed Burning as A Management Tool to Destroy Dry Seeds of Invasive Conifers in Heathland in DenmarkChristian Andreasen0Kasper Rossing1Christian Ritz2Department of Plant and Environmental Sciences, University of Copenhagen, Højbakkegaard Allé 13, DK-2630 Taastrup, DenmarkDepartment of Plant and Environmental Sciences, University of Copenhagen, Højbakkegaard Allé 13, DK-2630 Taastrup, DenmarkDepartment of Nutrition, Exercise and Sports, Faculty of Science, University of Copenhagen, Rolighedsvej 25, DK-1958 Frederiksberg C, DenmarkNon-indigenous conifers are considered invasive to the coastal dune heathland in Denmark, and massive clearing is carried out in an attempt to recreate and keep the original heathland. Burning is a common method for managing, but its feasibility to control the seed bank of conifers has not been investigated. This project shows that the burning of logged conifer trees will often eliminate seeds of lodgepole pine, mugo pine and Sitka spruce, even when the seeds were placed into a depth of five centimeters in the soil. The effect on seeds depends on the fuel load and the fire conditions (e.g., dryness, wind, and temperature). If the seeds were exposed to a high temperature, the seeds were not able to germinate afterward. The temperature was about 80 °C for all species. If the sum of temperatures based on temperature records every 30 s exceeded between 12,000 and 14,000 °C no seeds were able to germinate. The relationship between the mean temperature of the burns and the germination rate at seeds placed in various soil depths was modelled. Findings should be interpreted cautiously as each depth-species combinations were not replicated in space or time due to practical constraints.https://www.mdpi.com/2073-445X/9/11/432lodgepole pineland restorationlandscape firemugo pine<i>Pinus mugo</i><i>Pinus contorta</i> |
| spellingShingle | Christian Andreasen Kasper Rossing Christian Ritz Prescribed Burning as A Management Tool to Destroy Dry Seeds of Invasive Conifers in Heathland in Denmark Land lodgepole pine land restoration landscape fire mugo pine <i>Pinus mugo</i> <i>Pinus contorta</i> |
| title | Prescribed Burning as A Management Tool to Destroy Dry Seeds of Invasive Conifers in Heathland in Denmark |
| title_full | Prescribed Burning as A Management Tool to Destroy Dry Seeds of Invasive Conifers in Heathland in Denmark |
| title_fullStr | Prescribed Burning as A Management Tool to Destroy Dry Seeds of Invasive Conifers in Heathland in Denmark |
| title_full_unstemmed | Prescribed Burning as A Management Tool to Destroy Dry Seeds of Invasive Conifers in Heathland in Denmark |
| title_short | Prescribed Burning as A Management Tool to Destroy Dry Seeds of Invasive Conifers in Heathland in Denmark |
| title_sort | prescribed burning as a management tool to destroy dry seeds of invasive conifers in heathland in denmark |
| topic | lodgepole pine land restoration landscape fire mugo pine <i>Pinus mugo</i> <i>Pinus contorta</i> |
| url | https://www.mdpi.com/2073-445X/9/11/432 |
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