Contrasting Effects of Nitrogen Addition on Leaf Photosynthesis and Respiration in Black Mangrove in North Florida
Contrasting Effects of Nitrogen Addition on Leaf Photosynthesis and Respiration in Black Mangrove in North Florida
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氮添加对北佛罗里达州黑红树林叶片光合作用和呼吸作用的对比影响
DOI：
10.1007/s12237-022-01120-7
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发表时间：
2023
影响因子：
2.7
通讯作者：
Aspinwall, Michael J.
中科院分区：
文献类型：
--
作者：
Sturchio, Matthew A.;Chieppa, Jeff;Simpson, Lorae T.;Feller, Ilka C.;Chapman, Samantha K.;Aspinwall, Michael J.
养分富集是红树林生态系统环境变化的主要驱动力。然而，营养物富集对调节红树林植被与大气之间CO2和水通量的生理过程的影响尚不清楚。在佛罗里达北部，对长期（8年）营养强化（添加N、添加P、对照）的黑红树林（Avicennia germinans）叶片进行了生长高峰期光合作用（A）和呼吸作用（R）的测定。以往的研究结果表明，白骨壤的生产力是N限制的，但不是P限制的。因此，我们预计，N添加将增加光饱和净光合作用在环境CO2（Anet），内在水分利用效率（iWUE），最大速率的Rubisco羧化（Vcmax），和叶片暗呼吸（R），而P添加对光合作用或呼吸的任何方面的影响都很小。我们预计，增加光合作用和呼吸作用将是最明显的后立即加入氮和新形成的叶片。事实上，Anet和Vcmax增加后，在N添加处理，这些增加仅限于叶片形成后，N添加。尽管如此，随着时间的推移，光合参数和iWUE是相似的治疗。有趣的是，在25 °C下测量的R随着N的添加而增加;这种效果在各个时间点是一致的。施磷对R的影响不大。在各处理和时间点，Vcmax，25（标准化至25 °C的Vcmax）与大鼠25 °C无相关性，但标准化至25 °C的RuBP再生的最大电子传递速率（Jmax，25）随大鼠25 °C增加。我们的结论是，N添加可能有小，短暂的光合作用过程中的影响，但持续的影响，在N-有限的红树林生态系统的叶Rin。
Nutrient enrichment is a major driver of environmental change in mangrove ecosystems. Yet, nutrient enrichment impacts on physiological processes that regulate CO2and water fluxes between mangrove vegetation and the atmosphere remain unclear. We measured peak growing season photosynthesis (A) and respiration (R) in black mangrove (Avicennia germinans) leaves that had been subjected to long-term (8-year) nutrient enrichment (added N, added P, control) in north Florida. Previous results from this site indicated thatAvicenniaproductivity was N-limited, but not P-limited. Thus, we expected that N addition would increase light saturated net photosynthesis at ambient CO2(Anet), intrinsic water-use efficiency (iWUE), maximum rate of Rubisco carboxylation (Vcmax), and leaf dark respiration (R), while P addition would have little effect on any aspect of photosynthesis or respiration. We expected that increased photosynthesis and respiration would be most apparent immediately after N addition and in newly formed leaves. Indeed,AnetandVcmaxincreased just after N addition in the N addition treatment; these increases were limited to leaves formed just after N addition. Nonetheless, over time, photosynthetic parameters and iWUE were similar across treatments. Interestingly,Rmeasured at 25 °C increased with N addition; this effect was consistent across time points. P addition had little effect onR. Across treatments and time points,Vcmax,25(Vcmaxstandardized to 25 °C) showed no relationship withRat 25 °C, but the maximum rate of electron transport for RuBP regeneration standardized to 25 °C (Jmax,25) increased withRat 25 °C. We conclude that N addition may have small, short-lived effects on photosynthetic processes, but sustained effects on leafRin N-limited mangrove ecosystems.
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影响因子：
2.8
作者：
C. Weaver;A. Armitage
通讯作者：
C. Weaver;A. Armitage
DOI：
10.1111/nph.16436
发表时间：
2020-01
期刊：
The New phytologist
影响因子：
--
作者：
Yann Salmon;A. Lintunen;Alexia Dayet;Tommy Chan;R. Dewar;T. Vesala;T. Hölttä
通讯作者：
Yann Salmon;A. Lintunen;Alexia Dayet;Tommy Chan;R. Dewar;T. Vesala;T. Hölttä
磷和氮限制红树林生态系统中植物功能的差异。
影响因子：
9.4
作者：
C. Lovelock;I. Feller;M. Ball;Bettina M. J. Engelbrecht;Mei Ling Ewe
通讯作者：
Mei Ling Ewe
影响因子：
11.6
作者：
Matt Sturchio;Jeff Chieppa;S. Chapman;Gabriela Cañas;Michael J. Aspinwall
通讯作者：
Matt Sturchio;Jeff Chieppa;S. Chapman;Gabriela Cañas;Michael J. Aspinwall
影响因子：
3.7
作者：
Dangremond, Emily M.;Simpson, Lorae T.;Feller, Ilka C.
通讯作者：
Feller, Ilka C.