Phosphorus deposition accelerates wood decomposition and temperature sensitivity in a subtropical forest
Phosphorus deposition accelerates wood decomposition and temperature sensitivity in a subtropical forest
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磷沉积加速亚热带森林的木材分解和温度敏感性
DOI：
10.1016/j.ecolind.2021.107819
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发表时间：
2021-09
影响因子：
6.9
通讯作者：
Liu Yuanqiu
中科院分区：
文献类型：
--
作者：
Wu Chunsheng;Shu Chunjie;Zhang Zhijian;Zhang Yi;Liu Yuanqiu
磷沉降在决定森林生产力和影响微生物分解者群落和活动方面起着至关重要的作用。木材在森林碳(C)动态中起着关键作用，因为它含有相当大比例的森林总碳。然而，增加P沉降对亚热带常绿森林木材呼吸（Rw）的影响尚不清楚。本研究在中国亚热带常绿森林进行了为期4年的田间因子施肥试验，研究了3个水平（0（对照）、30 （P1）和60 (P2) kg P/ha/yr）下磷沉降的模拟变化对石栎草（Thunb）的影响。纳街(李)。我们发现rw对木材温度的敏感性（Q10）明显高于空气温度。与对照相比，P1和P2处理的年均Rwby分别提高了1.82倍和0.98倍，与木材微生物分解者群落（包括真菌和细菌）、木材温度和有效磷呈显著正相关。P沉积也加速了Rw的q10。同时，每增加1 kg P/ha/yr，木材平均排放20.29 kg CO2/ha/yr，当P沉积超过30 kg P/ha/yr的P饱和阈值时，二氧化碳排放量下降。我们的研究结果揭示了在未来几十年气温升高的情况下，磷沉降对亚热带常绿森林木材二氧化碳排放和分解速率的影响。
Phosphorus (P) deposition plays a vital role in determining forest productivity and influencing microbial decomposer communities and activities. Wood plays a key role in forest carbon (C) dynamics because it contains a sizeable proportion of total forest C. However, the effects of increasing P deposition on wood respiration (Rw) in subtropical evergreen forests are still unclear. In this study, we conducted a four-year field factorial fertilization experiment in a subtropical Chinese evergreen forest to investigate the influences of simulated changes in P deposition at three levels (e.g., 0 (control), 30 (P1), and 60 (P2) kg P/ha/yr) on the RwofLithocarpus glaber(Thunb.) Nakai (LI). We found that Rwshowed significantly higher sensitivity (Q10) to wood temperature than to air temperature. The Rwrate was significantly and positively correlated with the wood microbial decomposer community (including fungi and bacteria), wood temperature and available P. Compared to the control treatment, the P1 and P2 treatments increased the mean annual Rwby approximately 1.82 and 0.98 times, respectively. P deposition also accelerated the Q10of Rw. Meanwhile, on average, wood emitted 20.29 kg CO2/ha/yr per 1 kg P/ha/yr added, which declined when P deposition increased above a P saturation threshold of 30 kg P/ha/yr. Our results provide insights into the influences of P deposition on carbon dioxide emissions from wood and also on decomposition rates in subtropical evergreen forests under the rising temperatures expected in the coming decades.
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影响因子：
2.9
作者：
Chunsheng Wu;Xiaohua Wei;Qifeng Mo;Qinglin Li;Xiaodong Li;Chunjie Shu;Liangying Liu;Yuan-qiu Liu-Yuan-qi
通讯作者：
Chunsheng Wu;Xiaohua Wei;Qifeng Mo;Qinglin Li;Xiaodong Li;Chunjie Shu;Liangying Liu;Yuan-qiu Liu-Yuan-qi
影响因子：
4
作者：
M. G. Ryan;M. Cavaleri;A. Almeida;R. Penchel;R. Senock;José Luiz Stape
通讯作者：
M. G. Ryan;M. Cavaleri;A. Almeida;R. Penchel;R. Senock;José Luiz Stape
影响因子：
3.7
作者：
Chunsheng Wu;Zhijian Zhang;Hankun Wang;Guoxian Huang;Chunjie Shu;Fanqian Kong;Yi Zhang;G. Wang;Yuan-qiu Liu
通讯作者：
Chunsheng Wu;Zhijian Zhang;Hankun Wang;Guoxian Huang;Chunjie Shu;Fanqian Kong;Yi Zhang;G. Wang;Yuan-qiu Liu
影响因子：
2.7
作者：
Bebber, Daniel P.;Watkinson, Sarah C.;Darrah, Peter R.
通讯作者：
Darrah, Peter R.
影响因子：
11.6
作者：
Cavaleri, Molly A.;Oberbauer, Steven F.;Ryan, Michael G.
通讯作者：
Ryan, Michael G.