Comparisons of radial growth and tree-ring cellulose δ13C for Pinus sylvestris var. mongolica in natural and plantation forests on sandy lands
Comparisons of radial growth and tree-ring cellulose δ13C for Pinus sylvestris var. mongolica in natural and plantation forests on sandy lands
复制标题
樟子松径向生长和树轮纤维素 δ13C 的比较。
DOI：
10.1080/13416979.2017.1288775
复制
发表时间：
2017-02
期刊：
影响因子：
--
通讯作者：
Zhang Jinxin
中科院分区：
文献类型：
--
作者：
Song Lining;Li Mingcai;Zhu Jiaojun;Zhang Jinxin
摘要：为了揭示水分胁迫对引进蒙古松人工林衰退的影响，比较了1965-2009年引进蒙古松人工林和天然蒙古松林的径向生长（断面积增量，BAI）和树轮纤维素δ13C（碳同位素组成）。结果表明，人工林的BAI在1990年之前一直呈上升趋势，随后从1990年到1996年急剧下降，此后保持稳定水平。相比之下，没有发现天然树木生长下降的迹象。经δ13C大气变化校正后，人工林树木年轮δ13Ccorr在1990年前后显着增加。然而，1990年前后天然树木年轮δ13Ccorr没有显着变化，表明没有明显的水分胁迫。 1990 年前后，这两个森林的内在水分利用效率（iWUE，根据树木年轮 δ13C 计算）显着增加。 1990 年以后，当降水量、帕尔默干旱严重指数 (PDSI) 和地下水位下降时，发现人工林 BAI 与 δ13Ccorr 或 iWUE 之间存在显着负相关关系，表明水分胁迫对生长产生影响。对于人工林，1990年后，PDSI与BAI和δ13Ccorr分别呈正相关和负相关。对于天然树，1990年后，BAI与PDSI没有关系。这些发现表明，PDSI的减少（如降水减少和气温升高）和地下水位的下降使人工林比天然树面临更严重的水分胁迫，从而降低了树木的生长。然而，其他压力因素，例如营养限制，也可能导致生长下降。
ABSTRACT To reveal the effects of water stress on the decline in introduced Mongolian pine (Pinus sylvestris var. mongolica) plantations, radial growth (basal area increment, BAI) and tree-ring cellulose δ13C (carbon isotope composition) were compared in an introduced Mongolian pine plantation and a natural Mongolian pine forest during 1965–2009. Results showed that the BAI of plantation trees increased until 1990, followed by an abrupt decline from 1990 to 1996 and maintained a stable level thereafter. In contrast, no sign of decreased growth was found for natural trees. Tree-ring δ13Ccorr of plantation trees, corrected for atmospheric changes in δ13C, significantly increased before and after 1990. However, no significant variations in tree-ring δ13Ccorr for natural trees before and after 1990 indicated no obviously water stress. Intrinsic water-use efficiency (iWUE, calculated from tree-ring δ13C) significantly increased before and after 1990 for both forests. Significant negative relationship between BAI and δ13Ccorr or iWUE was found for plantation trees after 1990 when precipitation, Palmer Drought Severity Index (PDSI) and groundwater level decreased, suggesting water stress impact on growth. For plantation trees, PDSI was positively and negatively correlated with BAI and δ13Ccorr, respectively, after 1990. For natural trees, BAI had no relationship with PDSI after 1990. These findings suggested that a decrease in PDSI (e.g. decreased precipitation and higher temperature) and groundwater level had made plantation trees face a more serious water stress compared with that of natural trees, which decreased tree growth. However, other stressors such as nutrient limitation may also contribute to growth decline.
登录
查看更多内容
DOI：
--
发表时间：
2003-12
期刊：
--
影响因子：
--
作者：
M. Warensjö
通讯作者：
M. Warensjö
DOI：
--
发表时间：
2004-12
期刊：
Ying yong sheng tai xue bao = The journal of applied ecology
影响因子：
--
作者：
Xiangyun Wu;F. Jiang;Xiaodan Li;Yang Xue;S. Qiu
通讯作者：
Xiangyun Wu;F. Jiang;Xiaodan Li;Yang Xue;S. Qiu
影响因子：
11.6
作者：
Gomez-Guerrero, Armando;Silva, Lucas C. R.;Horwath, William R.
通讯作者：
Horwath, William R.
影响因子：
4
作者：
McCarroll, D;Loader, NJ
通讯作者：
Loader, NJ
影响因子：
3
作者：
Jiaojun Zhu;Fengqin Li;Mei-ling Xu;Hong-zhang Kang;Xiang-yun Wu
通讯作者：
Jiaojun Zhu;Fengqin Li;Mei-ling Xu;Hong-zhang Kang;Xiang-yun Wu