Ignoring temperature variation leads to underestimation of the temperature sensitivity of plant litter decomposition
Ignoring temperature variation leads to underestimation of the temperature sensitivity of plant litter decomposition
复制标题
忽略温度变化会导致低估植物凋落物分解的温度敏感性
DOI：
10.1002/ecs2.3050
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发表时间：
2020
期刊：
影响因子：
2.7
通讯作者：
Benstead, Jonathan P.
中科院分区：
文献类型：
--
作者：
Tomczyk, Nathan J.;Rosemond, Amy D.;Bumpers, Phillip M.;Cummins, Carolyn S.;Wenger, Seth J.;Benstead, Jonathan P.
大部分陆地净初级生产力都会分解，为碎屑食物网提供燃料，并将死去的植物碳转化为大气中的二氧化碳。人们对确定这一过程对气候变暖的敏感性非常感兴趣。一种常见的方法是使用温度的空间梯度（即纬度或海拔）来估计温度敏感性。然而，这些研究通常将分解速率与沿着这种梯度的每个地点的平均温度联系起来，忽略了地点内的温度变化。为了评估温度变化对温度敏感性估计的潜在影响，我们使用随机生成的温度序列和实时温度序列模拟植物凋落物的分解。该模拟方法说明了在给定平均温度下温度变化如何导致比温度保持恒定的模拟预测更高的分解速率。分解速率的增加在较冷的地点最为明显，那里温度的时间变化往往比较温暖的地点更大。温度变化的这种不平衡效应改变了平均温度和分解速率之间关系的斜率，导致估计温度敏感性低于用于模拟分解的温度敏感性。例如，当使用 trueEaset 模拟分解至 0.65 eV 的标准呼吸值时，活化能 (Ea) 的估计值比 trueEa 低 0.15 eV。我们发现估计的 Ea 低于真实的 Eafor 地表、土壤和空气温度，但河流温度则不然，因为河流温度的变化与平均温度之间只有微弱的关系。我们的结果表明，常用的方法可能低估了凋落物分解的温度依赖性，特别是在陆地环境中。我们鼓励发布包括变化估计的温度数据，并建议使用一种替代方法来计算考虑温度变化的温度敏感性。
The majority of terrestrial net primary production decomposes, fueling detrital food webs and converting dead plant carbon to atmospheric CO2. There is considerable interest in determining the sensitivity of this process to climate warming. A common approach has been to use spatial gradients in temperature (i.e., latitude or elevation) to estimate temperature sensitivity. However, these studies typically relate decomposition rates to average temperatures at each site along such gradients, ignoring within‐site temperature variation. To evaluate the potential effects of temperature variation on estimates of temperature sensitivity, we simulated plant litter decomposition using both randomly generated and real time series of temperature. This simulation approach illustrated how temperature variation leads to higher decomposition rates at a given mean temperature than is predicted from simulations in which temperature is held constant. Increases in decomposition rate were most evident at cooler sites, where temporal variation in temperature tends to be greater than at warmer sites. This unbalanced effect of temperature variation shifted the slope of the relationships between average temperature and decomposition rate, resulting in lower estimated temperature sensitivities than were used to simulate decomposition. For example, estimates of activation energy (Ea) were as much as 0.15 eV lower than the trueEawhen decomposition was simulated with the trueEaset to the canonical respiration value of 0.65 eV. We found that the estimatedEawas lower than the trueEafor surface, soil, and air temperatures, but not for stream temperatures, for which there was only a weak relationship between temperature variation and mean temperature. Our results suggest that commonly used methods may underestimate the temperature dependence of litter decomposition, particularly in terrestrial environments. We encourage publication of temperature data that include variation estimates and suggest an alternative method for calculating temperature sensitivity that accounts for variation in temperature.
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溪流中木材的分解率
影响因子：
--
作者：
Bernd Spänhoff;E. Meyer
通讯作者：
E. Meyer
DOI：
--
发表时间：
1980
期刊：
影响因子：
--
作者：
G. Ågren;B. Axelsson
通讯作者：
B. Axelsson
影响因子：
5.4
作者：
Isaak, Daniel J.;Wenger, Seth J.;Parkes-Payne, Sharon
通讯作者：
Parkes-Payne, Sharon
影响因子：
13.6
作者：
S. Tiegs;D. Costello;M. Isken;G. Woodward;P. McIntyre;M. Gessner;É. Chauvet;N. Griffiths;A. Flecker;V. Acuña;R. Albariño;D. Allen;C. Alonso;P. Andino;C. Arango;J. Aroviita;M. V. M. Barbosa-M.-V.-M.-Barbosa-2056131036;L. Barmuta;C. Baxter;T. Bell;Brent J. Bellinger;L. Boyero;L. Brown;A. Bruder;D. Bruesewitz;F. Burdon;M. Callisto;C. Canhoto;K. Capps;M. M. Castillo-M.;J. Clapcott;Fanny Colas;C. Colón-Gaud;Julien Cornut;Verónica Crespo‐Pérez;W. Cross;J. Culp;M. Danger;O. Dangles;E. de Eyto;A. Derry;V. Villanueva;M. Douglas;A. Elosegi;A. Encalada;S. Entrekin;Rodrigo Espinosa;D. Ethaiya;Verónica Ferreira;C. Ferriol;K. Flanagan;T. Fleituch;J. F. Follstad Shah;A. Frainer;N. Friberg;P. Frost;Erica A. García;Liliana García Lago;Pavel Ernesto García Soto;S. Ghate;D. Giling;Alan Gilmer;J. Gonçalves;R. Gonzales;M. Graça;Mike Grace;H. Grossart;F. Guérold;V. Gulis;L. U. Hepp;S. Higgins;Takuo Hishi;J. Huddart;J. Hudson;Samantha J. Imberger;Carlos Iñiguez‐Armijos;Tomoya Iwata;David J. Janetski;E. Jennings;A. Kirkwood;A. A. Koning-A.;S. Kosten;K. Kuehn;H. Laudon;P. Leavitt;A. L. Lemes da Silva;Shawn J. Leroux;C. LeRoy;P. Lisi;R. MacKenzie;Amy M. Marcarelli;Frank O. Masese;B. Mckie;Adriana Oliveira Medeiros;K. Meissner;M. Miliša;S. Mishra;Yoshitaka Miyake;Ashley H. Moerke;S. Mombrikotb;R. Mooney;T. Moulton;T. Muotka;J. Negishi;Vinicius Neres‐Lima;M. Nieminen;Jorge Nimptsch;J. Ondruch;Riku Paavola;I. Pardo;C. Patrick;E. Peeters;J. Pozo;C. Pringle;A. Prussian;Estefania Quenta;A. Quesada;B. Reid;J. Richardson;A. Rigosi;J. Rincón;G. Rîșnoveanu;C. Robinson;L. Rodríguez-gallego;T. Royer;J. Rusak;Anna C. Santamans;G. Selmeczy;G. Simiyu;A. Skuja;J. Smykla;K. Sridhar;R. Sponseller;A. Stoler;C. Swan;D. Szlag;F. Teixeira-de Mello;J. Tonkin;Sari Uusheimo;A. Veach;S. Vilbaste;L. Vought;Chiao‐Ping Wang;J. Webster;Paul Wilson;S. Woelfl;M. Xenopoulos;A. Yates;C. Yoshimura;C. Yule;Yixin Zhang;Jacob Aaron Zwart
通讯作者：
S. Tiegs;D. Costello;M. Isken;G. Woodward;P. McIntyre;M. Gessner;É. Chauvet;N. Griffiths;A. Flecker;V. Acuña;R. Albariño;D. Allen;C. Alonso;P. Andino;C. Arango;J. Aroviita;M. V. M. Barbosa-M.-V.-M.-Barbosa-2056131036;L. Barmuta;C. Baxter;T. Bell;Brent J. Bellinger;L. Boyero;L. Brown;A. Bruder;D. Bruesewitz;F. Burdon;M. Callisto;C. Canhoto;K. Capps;M. M. Castillo-M.;J. Clapcott;Fanny Colas;C. Colón-Gaud;Julien Cornut;Verónica Crespo‐Pérez;W. Cross;J. Culp;M. Danger;O. Dangles;E. de Eyto;A. Derry;V. Villanueva;M. Douglas;A. Elosegi;A. Encalada;S. Entrekin;Rodrigo Espinosa;D. Ethaiya;Verónica Ferreira;C. Ferriol;K. Flanagan;T. Fleituch;J. F. Follstad Shah;A. Frainer;N. Friberg;P. Frost;Erica A. García;Liliana García Lago;Pavel Ernesto García Soto;S. Ghate;D. Giling;Alan Gilmer;J. Gonçalves;R. Gonzales;M. Graça;Mike Grace;H. Grossart;F. Guérold;V. Gulis;L. U. Hepp;S. Higgins;Takuo Hishi;J. Huddart;J. Hudson;Samantha J. Imberger;Carlos Iñiguez‐Armijos;Tomoya Iwata;David J. Janetski;E. Jennings;A. Kirkwood;A. A. Koning-A.;S. Kosten;K. Kuehn;H. Laudon;P. Leavitt;A. L. Lemes da Silva;Shawn J. Leroux;C. LeRoy;P. Lisi;R. MacKenzie;Amy M. Marcarelli;Frank O. Masese;B. Mckie;Adriana Oliveira Medeiros;K. Meissner;M. Miliša;S. Mishra;Yoshitaka Miyake;Ashley H. Moerke;S. Mombrikotb;R. Mooney;T. Moulton;T. Muotka;J. Negishi;Vinicius Neres‐Lima;M. Nieminen;Jorge Nimptsch;J. Ondruch;Riku Paavola;I. Pardo;C. Patrick;E. Peeters;J. Pozo;C. Pringle;A. Prussian;Estefania Quenta;A. Quesada;B. Reid;J. Richardson;A. Rigosi;J. Rincón;G. Rîșnoveanu;C. Robinson;L. Rodríguez-gallego;T. Royer;J. Rusak;Anna C. Santamans;G. Selmeczy;G. Simiyu;A. Skuja;J. Smykla;K. Sridhar;R. Sponseller;A. Stoler;C. Swan;D. Szlag;F. Teixeira-de Mello;J. Tonkin;Sari Uusheimo;A. Veach;S. Vilbaste;L. Vought;Chiao‐Ping Wang;J. Webster;Paul Wilson;S. Woelfl;M. Xenopoulos;A. Yates;C. Yoshimura;C. Yule;Yixin Zhang;Jacob Aaron Zwart
改进了跨纬度和海拔梯度的物种、种群和生态系统的尺度关系的近似值。
影响因子：
2
作者：
V. Savage
通讯作者：
V. Savage