Plant and mule deer responses to pinyon‐juniper removal by three mechanical methods
Abstract Land managers in western North America often reverse succession by removing pinyon (Pinus spp.) and juniper (Juniperus spp.) trees to reduce fire risk and increase forage for wildlife and livestock. Because prescribed fire carries inherent risks, mechanical methods such as chaining, roller‐...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
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Wiley
2023-06-01
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| Series: | Wildlife Society Bulletin |
| Subjects: | |
| Online Access: | https://doi.org/10.1002/wsb.1421 |
| _version_ | 1827863026422775808 |
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| author | Danielle Bilyeu Johnston Charles R. Anderson Jr. |
| author_facet | Danielle Bilyeu Johnston Charles R. Anderson Jr. |
| author_sort | Danielle Bilyeu Johnston |
| collection | DOAJ |
| description | Abstract Land managers in western North America often reverse succession by removing pinyon (Pinus spp.) and juniper (Juniperus spp.) trees to reduce fire risk and increase forage for wildlife and livestock. Because prescribed fire carries inherent risks, mechanical methods such as chaining, roller‐chopping, and mastication are often used. Mechanical methods differ in cost and the size of woody debris produced, and may differentially impact plant and animal responses. We implemented a randomized, complete‐block, split‐plot experiment in December 2011 in the Piceance Basin, northwestern Colorado, USA, to compare mechanical methods and to explore seeding (subplot) interactions. We assessed vegetation 1‐, 2‐, 5‐, and 6‐years post‐treatment, and mule deer (Odocoileus hemionus) response via GPS locations 3–8 years post‐treatment. By 2016, treated plots had 3–5 times higher perennial grass cover and ~10 times higher cheatgrass (Bromus tectorum) cover than untreated control plots. Roller‐chopped plots had both the highest non‐native annual forb cover, and when seeded, the highest density of bitterbrush (Purshia tridentata), a nutritious shrub used by mule deer. Masticated plots had higher bitterbrush use during summer and fall, leaving less forage available for winter. Days of winter mule deer use from GPS point locations in chained and roller‐chopped plots was ~70% higher than in control plots, while winter use in masticated plots was similar to control plots. Mule deer use appears related to a combination of hiding cover, resulting from residual woody debris, and winter forage availability. Roller‐chopped plots provide the best combination of hiding cover and winter forage, but mastication or chaining, applied leaving dispersed security cover, may be better options at large scales or when invasive species concerns exist. |
| first_indexed | 2024-03-12T14:02:59Z |
| format | Article |
| id | doaj.art-b0570de2dc8847edbe5c70b4b112d0df |
| institution | Directory Open Access Journal |
| issn | 2328-5540 |
| language | English |
| last_indexed | 2024-03-12T14:02:59Z |
| publishDate | 2023-06-01 |
| publisher | Wiley |
| record_format | Article |
| series | Wildlife Society Bulletin |
| spelling | doaj.art-b0570de2dc8847edbe5c70b4b112d0df2023-08-21T21:45:19ZengWileyWildlife Society Bulletin2328-55402023-06-01472n/an/a10.1002/wsb.1421Plant and mule deer responses to pinyon‐juniper removal by three mechanical methodsDanielle Bilyeu Johnston0Charles R. Anderson Jr.1Colorado Parks and Wildlife 711 Independent Avenue Grand Junction CO 81505 USAColorado Parks and Wildlife 317 Prospect Avenue Fort Collins CO 80526 USAAbstract Land managers in western North America often reverse succession by removing pinyon (Pinus spp.) and juniper (Juniperus spp.) trees to reduce fire risk and increase forage for wildlife and livestock. Because prescribed fire carries inherent risks, mechanical methods such as chaining, roller‐chopping, and mastication are often used. Mechanical methods differ in cost and the size of woody debris produced, and may differentially impact plant and animal responses. We implemented a randomized, complete‐block, split‐plot experiment in December 2011 in the Piceance Basin, northwestern Colorado, USA, to compare mechanical methods and to explore seeding (subplot) interactions. We assessed vegetation 1‐, 2‐, 5‐, and 6‐years post‐treatment, and mule deer (Odocoileus hemionus) response via GPS locations 3–8 years post‐treatment. By 2016, treated plots had 3–5 times higher perennial grass cover and ~10 times higher cheatgrass (Bromus tectorum) cover than untreated control plots. Roller‐chopped plots had both the highest non‐native annual forb cover, and when seeded, the highest density of bitterbrush (Purshia tridentata), a nutritious shrub used by mule deer. Masticated plots had higher bitterbrush use during summer and fall, leaving less forage available for winter. Days of winter mule deer use from GPS point locations in chained and roller‐chopped plots was ~70% higher than in control plots, while winter use in masticated plots was similar to control plots. Mule deer use appears related to a combination of hiding cover, resulting from residual woody debris, and winter forage availability. Roller‐chopped plots provide the best combination of hiding cover and winter forage, but mastication or chaining, applied leaving dispersed security cover, may be better options at large scales or when invasive species concerns exist.https://doi.org/10.1002/wsb.1421bitterbrushchainingmasticationmule deerOdocoileus hemionuspinyon‐juniper habitat |
| spellingShingle | Danielle Bilyeu Johnston Charles R. Anderson Jr. Plant and mule deer responses to pinyon‐juniper removal by three mechanical methods Wildlife Society Bulletin bitterbrush chaining mastication mule deer Odocoileus hemionus pinyon‐juniper habitat |
| title | Plant and mule deer responses to pinyon‐juniper removal by three mechanical methods |
| title_full | Plant and mule deer responses to pinyon‐juniper removal by three mechanical methods |
| title_fullStr | Plant and mule deer responses to pinyon‐juniper removal by three mechanical methods |
| title_full_unstemmed | Plant and mule deer responses to pinyon‐juniper removal by three mechanical methods |
| title_short | Plant and mule deer responses to pinyon‐juniper removal by three mechanical methods |
| title_sort | plant and mule deer responses to pinyon juniper removal by three mechanical methods |
| topic | bitterbrush chaining mastication mule deer Odocoileus hemionus pinyon‐juniper habitat |
| url | https://doi.org/10.1002/wsb.1421 |
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