Spring Moisture Availability is the Major Limitation for Pine Forest Productivity in Southwest China
Forests in low-latitude (0° N–30° N) regions are important for greenhouse gas sequestration. They harbor around 25% of vegetation carbon stocks. The productivity of these forests is expected to change as the global climate changes. They may absorb less greenhouse gasses, with negative effects on the...
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| Format: | Article |
| Language: | English |
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MDPI AG
2020-04-01
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| Series: | Forests |
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| Online Access: | https://www.mdpi.com/1999-4907/11/4/446 |
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| author | Yingfeng Bi Cory Whitney Jianwen Li Jingchao Yang Xuefei Yang |
| author_facet | Yingfeng Bi Cory Whitney Jianwen Li Jingchao Yang Xuefei Yang |
| author_sort | Yingfeng Bi |
| collection | DOAJ |
| description | Forests in low-latitude (0° N–30° N) regions are important for greenhouse gas sequestration. They harbor around 25% of vegetation carbon stocks. The productivity of these forests is expected to change as the global climate changes. They may absorb less greenhouse gasses, with negative effects on the global climate. However, little is known about how exactly these forests will respond to climate change. Here, we focus on the largest pine forests in low-latitude forests areas in southwest China. These forests have experienced rapid climate warming over the past 60 years. We collected tree-ring cores from two naturally occurring key afforestation pine tree species: <i>Pinus yunnanensis</i> Franch. and <i>Pinus armandii</i> Franch. in Baoshan and Lijiang of Yunnan. We used basal area increment (BAI) to examine the productivity trends of these two species over long-time scales, and Partial Least Squares regression analysis together with Pearson correlation analysis to identify the critical climate periods for the growth of these two species. We found that: (1) regional pine tree productivity began to decline at the beginning of this century. (2) The radial growth of both species had the strongest positive correlation with the spring Palmer Drought Severity Index (PDSI) and precipitation and the strongest negative correlation with spring temperatures. (3) Climate responses differ by species with higher positive correlations between tree-ring width, PDSI, and precipitation in <i>P. armandii</i> than in <i>P. yunnanensis</i> at similar locations. (4) Climate responses differ by location with higher positive correlations between tree-ring width and PDSI in Lijiang than in Baoshan for <i>P. yunnanensis</i>. Our results suggest that spring moisture availability is the main limiting factor for pine tree growth, especially for <i>P. yunnanensis</i> in Lijiang and <i>P. armandii</i> in Baoshan. Future regional warming and warm-induced drought conditions may have negative effects on the growth of pine trees. These results provide reference data for the sustainable management of pine forests in low-latitude regions of southwest China and may be useful in assessing the sustainable carbon sink ability of pine forests in this region under climate change. |
| first_indexed | 2024-03-10T20:27:12Z |
| format | Article |
| id | doaj.art-80851eb59af14fc0b1fd90896e50df2c |
| institution | Directory Open Access Journal |
| issn | 1999-4907 |
| language | English |
| last_indexed | 2024-03-10T20:27:12Z |
| publishDate | 2020-04-01 |
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| series | Forests |
| spelling | doaj.art-80851eb59af14fc0b1fd90896e50df2c2023-11-19T21:41:56ZengMDPI AGForests1999-49072020-04-0111444610.3390/f11040446Spring Moisture Availability is the Major Limitation for Pine Forest Productivity in Southwest ChinaYingfeng Bi0Cory Whitney1Jianwen Li2Jingchao Yang3Xuefei Yang4Key Laboratory for Plant Diversity and Biogeography of East Asia, Chinese Academy of Sciences, Kunming 650201, ChinaInstitute of Crop Science and Resource Conservation (INRES)—Horticultural Sciences/Center for Development Research (ZEF), University of Bonn, 53121 Bonn, GermanyKey Laboratory for Plant Diversity and Biogeography of East Asia, Chinese Academy of Sciences, Kunming 650201, ChinaKunming Institute of Survey and Design, State Forestry and Grassland Administration, Kunming 650216, Yunnan, ChinaKey Laboratory for Plant Diversity and Biogeography of East Asia, Chinese Academy of Sciences, Kunming 650201, ChinaForests in low-latitude (0° N–30° N) regions are important for greenhouse gas sequestration. They harbor around 25% of vegetation carbon stocks. The productivity of these forests is expected to change as the global climate changes. They may absorb less greenhouse gasses, with negative effects on the global climate. However, little is known about how exactly these forests will respond to climate change. Here, we focus on the largest pine forests in low-latitude forests areas in southwest China. These forests have experienced rapid climate warming over the past 60 years. We collected tree-ring cores from two naturally occurring key afforestation pine tree species: <i>Pinus yunnanensis</i> Franch. and <i>Pinus armandii</i> Franch. in Baoshan and Lijiang of Yunnan. We used basal area increment (BAI) to examine the productivity trends of these two species over long-time scales, and Partial Least Squares regression analysis together with Pearson correlation analysis to identify the critical climate periods for the growth of these two species. We found that: (1) regional pine tree productivity began to decline at the beginning of this century. (2) The radial growth of both species had the strongest positive correlation with the spring Palmer Drought Severity Index (PDSI) and precipitation and the strongest negative correlation with spring temperatures. (3) Climate responses differ by species with higher positive correlations between tree-ring width, PDSI, and precipitation in <i>P. armandii</i> than in <i>P. yunnanensis</i> at similar locations. (4) Climate responses differ by location with higher positive correlations between tree-ring width and PDSI in Lijiang than in Baoshan for <i>P. yunnanensis</i>. Our results suggest that spring moisture availability is the main limiting factor for pine tree growth, especially for <i>P. yunnanensis</i> in Lijiang and <i>P. armandii</i> in Baoshan. Future regional warming and warm-induced drought conditions may have negative effects on the growth of pine trees. These results provide reference data for the sustainable management of pine forests in low-latitude regions of southwest China and may be useful in assessing the sustainable carbon sink ability of pine forests in this region under climate change.https://www.mdpi.com/1999-4907/11/4/446tree-ringpine treesouthwest Chinaclimate change |
| spellingShingle | Yingfeng Bi Cory Whitney Jianwen Li Jingchao Yang Xuefei Yang Spring Moisture Availability is the Major Limitation for Pine Forest Productivity in Southwest China Forests tree-ring pine tree southwest China climate change |
| title | Spring Moisture Availability is the Major Limitation for Pine Forest Productivity in Southwest China |
| title_full | Spring Moisture Availability is the Major Limitation for Pine Forest Productivity in Southwest China |
| title_fullStr | Spring Moisture Availability is the Major Limitation for Pine Forest Productivity in Southwest China |
| title_full_unstemmed | Spring Moisture Availability is the Major Limitation for Pine Forest Productivity in Southwest China |
| title_short | Spring Moisture Availability is the Major Limitation for Pine Forest Productivity in Southwest China |
| title_sort | spring moisture availability is the major limitation for pine forest productivity in southwest china |
| topic | tree-ring pine tree southwest China climate change |
| url | https://www.mdpi.com/1999-4907/11/4/446 |
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