Divergent responses of belowground carbon investment in Quercus spp. and Acer saccharum to reduced precipitation
With global change already enhancing drought frequency and severity, there is a critical need to determine if temperate forests will continue to act as carbon (C) sinks. The degree to which belowground strategies sustain tree growth under water stress remains uncertain. We examined differences betwe...
| Main Authors: | , , , |
|---|---|
| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2023
|
| Subjects: | |
| Online Access: | https://hdl.handle.net/10356/171258 |
| _version_ | 1826118347689820160 |
|---|---|
| author | Raczka, Nanette Christine Walter, Christopher A. Carrara, Joseph E. Brzostek, Edward R. |
| author2 | Asian School of the Environment |
| author_facet | Asian School of the Environment Raczka, Nanette Christine Walter, Christopher A. Carrara, Joseph E. Brzostek, Edward R. |
| author_sort | Raczka, Nanette Christine |
| collection | NTU |
| description | With global change already enhancing drought frequency and severity, there is a critical need to determine if temperate forests will continue to act as carbon (C) sinks. The degree to which belowground strategies sustain tree growth under water stress remains uncertain. We examined differences between two temperate forest tree species in their belowground response to experimentally reduced precipitation over three years. We chose trees that are dominant in temperate forests and have different belowground resource acquisition strategies. We tested our hypothesis that in response to reduced precipitation, sugar maple trees would reduce belowground C investment while oak trees would show resiliency belowground. We found that oak trees maintained belowground C investment at the same level, likely reflecting an ability to leverage a higher baseline level of investment to enhance water and nutrient uptake. By contrast, sugar maple trees initially responded with increased investment in roots and mycorrhizae, but mycorrhizal colonization faded over time. Moreover, the treatment reduced rhizodeposition belowground by sugar maple trees, suggesting that the belowground C investment we observed does not lead to increased mobilization of nutrients. Our findings indicate that there are species specific responses of C investment in roots, mycorrhizae, and rhizodeposits to reduced precipitation. |
| first_indexed | 2024-10-01T04:42:15Z |
| format | Journal Article |
| id | ntu-10356/171258 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T04:42:15Z |
| publishDate | 2023 |
| record_format | dspace |
| spelling | ntu-10356/1712582023-10-18T01:55:19Z Divergent responses of belowground carbon investment in Quercus spp. and Acer saccharum to reduced precipitation Raczka, Nanette Christine Walter, Christopher A. Carrara, Joseph E. Brzostek, Edward R. Asian School of the Environment Engineering::Environmental engineering Water Stress Temperate Forest With global change already enhancing drought frequency and severity, there is a critical need to determine if temperate forests will continue to act as carbon (C) sinks. The degree to which belowground strategies sustain tree growth under water stress remains uncertain. We examined differences between two temperate forest tree species in their belowground response to experimentally reduced precipitation over three years. We chose trees that are dominant in temperate forests and have different belowground resource acquisition strategies. We tested our hypothesis that in response to reduced precipitation, sugar maple trees would reduce belowground C investment while oak trees would show resiliency belowground. We found that oak trees maintained belowground C investment at the same level, likely reflecting an ability to leverage a higher baseline level of investment to enhance water and nutrient uptake. By contrast, sugar maple trees initially responded with increased investment in roots and mycorrhizae, but mycorrhizal colonization faded over time. Moreover, the treatment reduced rhizodeposition belowground by sugar maple trees, suggesting that the belowground C investment we observed does not lead to increased mobilization of nutrients. Our findings indicate that there are species specific responses of C investment in roots, mycorrhizae, and rhizodeposits to reduced precipitation. 2023-10-18T01:55:19Z 2023-10-18T01:55:19Z 2023 Journal Article Raczka, N. C., Walter, C. A., Carrara, J. E. & Brzostek, E. R. (2023). Divergent responses of belowground carbon investment in Quercus spp. and Acer saccharum to reduced precipitation. Biogeochemistry, 165(2), 227-238. https://dx.doi.org/10.1007/s10533-023-01078-z 0168-2563 https://hdl.handle.net/10356/171258 10.1007/s10533-023-01078-z 2-s2.0-85168281492 2 165 227 238 en Biogeochemistry © 2023 The Author(s), under exclusive licence to Springer Nature Switzerland AG. All rights reserved. |
| spellingShingle | Engineering::Environmental engineering Water Stress Temperate Forest Raczka, Nanette Christine Walter, Christopher A. Carrara, Joseph E. Brzostek, Edward R. Divergent responses of belowground carbon investment in Quercus spp. and Acer saccharum to reduced precipitation |
| title | Divergent responses of belowground carbon investment in Quercus spp. and Acer saccharum to reduced precipitation |
| title_full | Divergent responses of belowground carbon investment in Quercus spp. and Acer saccharum to reduced precipitation |
| title_fullStr | Divergent responses of belowground carbon investment in Quercus spp. and Acer saccharum to reduced precipitation |
| title_full_unstemmed | Divergent responses of belowground carbon investment in Quercus spp. and Acer saccharum to reduced precipitation |
| title_short | Divergent responses of belowground carbon investment in Quercus spp. and Acer saccharum to reduced precipitation |
| title_sort | divergent responses of belowground carbon investment in quercus spp and acer saccharum to reduced precipitation |
| topic | Engineering::Environmental engineering Water Stress Temperate Forest |
| url | https://hdl.handle.net/10356/171258 |
| work_keys_str_mv | AT raczkananettechristine divergentresponsesofbelowgroundcarboninvestmentinquercussppandacersaccharumtoreducedprecipitation AT walterchristophera divergentresponsesofbelowgroundcarboninvestmentinquercussppandacersaccharumtoreducedprecipitation AT carrarajosephe divergentresponsesofbelowgroundcarboninvestmentinquercussppandacersaccharumtoreducedprecipitation AT brzostekedwardr divergentresponsesofbelowgroundcarboninvestmentinquercussppandacersaccharumtoreducedprecipitation |