Responses of grassland production to single and multiple global environmental changes.
Responses of grassland production to single and multiple global environmental changes.
复制标题
草地生产对单个和多种全球环境变化的反应。
DOI：
10.1371/journal.pbio.0030319
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发表时间：
2005-10
期刊：
影响因子：
9.8
通讯作者：
Field, CB
中科院分区：
文献类型：
--
作者：
Dukes, JS;Chiariello, NR;Cleland, EE;Moore, LA;Shaw, MR;Thayer, S;Tobeck, T;Mooney, HA;Field, CB
在本世纪，地球大气中二氧化碳(CO2)和其他温室气体浓度的增加预计将导致地表温度变暖，降水模式发生变化。与此同时，活性氮正以前所未有的速度进入自然系统。这些全球环境变化对自然生态系统的功能产生了影响，这些系统的反应可能会反馈到影响气候和大气组成的地方。在这里，我们报告了暴露在四个预期的全球环境变化的因子组合中的生态系统的植物生长响应。我们让加州草原暴露在二氧化碳、温度、降水和氮沉积升高的环境中长达五年。根和地上部的产量对二氧化碳升高或温和变暖没有反应。补充降水导致地上部产量增加，抵消了根系产量的下降。补充硝酸盐沉积主要通过刺激新梢生长，使总产量平均增加26%。主要处理间的互作很少。总而言之，这些结果表明，该草原的产量对二氧化碳和冬季降水的变化以及少量变暖的反应最小。增加硝酸盐沉降量将对草地产生更大的影响。除了这种硝酸盐反应，这个系统似乎不太可能实现大气和气候变化将通过增加植物生长来促进碳储存的期望。贾斯珀里奇全球变化实验的头五年表明，草原对气候和二氧化碳浓度变化的生产反应不太可能单独导致生产力的提高。
In this century, increasing concentrations of carbon dioxide (CO2) and other greenhouse gases in the Earth's atmosphere are expected to cause warmer surface temperatures and changes in precipitation patterns. At the same time, reactive nitrogen is entering natural systems at unprecedented rates. These global environmental changes have consequences for the functioning of natural ecosystems, and responses of these systems may feed back to affect climate and atmospheric composition. Here, we report plant growth responses of an ecosystem exposed to factorial combinations of four expected global environmental changes. We exposed California grassland to elevated CO2, temperature, precipitation, and nitrogen deposition for five years. Root and shoot production did not respond to elevated CO2 or modest warming. Supplemental precipitation led to increases in shoot production and offsetting decreases in root production. Supplemental nitrate deposition increased total production by an average of 26%, primarily by stimulating shoot growth. Interactions among the main treatments were rare. Together, these results suggest that production in this grassland will respond minimally to changes in CO2 and winter precipitation, and to small amounts of warming. Increased nitrate deposition would have stronger effects on the grassland. Aside from this nitrate response, expectations that a changing atmosphere and climate would promote carbon storage by increasing plant growth appear unlikely to be realized in this system. The first five years of the Jasper Ridge Global Change Experiment show that production responses of the grassland to changes in climate and CO2 concentration are unlikely to lead to increased productivity on their own.
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影响因子：
4.8
作者：
CHAPIN, FS;SHAVER, GR;LAUNDRE, JA
通讯作者：
LAUNDRE, JA
影响因子：
2.1
作者：
JONES, MB
通讯作者：
JONES, MB
影响因子：
11.6
作者：
Higgins, PAT;Jackson, RB;Field, CB
通讯作者：
Field, CB
影响因子：
10.1
作者：
Luo, Y;Su, B;Field, CB
通讯作者：
Field, CB
DOI：
10.2307/3896603
发表时间：
1971-01-01
期刊：
JOURNAL OF RANGE MANAGEMENT
影响因子：
--
作者：
LUEBS, RE;LAAG, AE;BROWN, MJ
通讯作者：
BROWN, MJ