The Temperature Dependence of Phytoplankton Stoichiometry: Investigating the Roles of Species Sorting and Local Adaptation.
The Temperature Dependence of Phytoplankton Stoichiometry: Investigating the Roles of Species Sorting and Local Adaptation.
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DOI：
10.3389/fmicb.2017.02003
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发表时间：
2017
影响因子：
5.2
通讯作者：
Trimmer M
中科院分区：
文献类型：
--
作者：
Yvon-Durocher G;Schaum CE;Trimmer M
浮游植物的元素组成（C：N：P化学计量比）是调节营养盐循环、初级生产和通过浮游食物网进行能量转移的关键因素。然而，我们对温度控制浮游植物化学计量的多种直接和间接机制的理解是不完整的，这增加了全球变暖对水生生态系统生物化学功能影响的不确定性。在这里，我们使用了长达十年的变暖实验在室外淡水池塘，以调查如何温度驱动的营业额在物种组成和化学计量性状的变化，通过当地的热适应有助于变暖的影响悬浮物的化学计量。我们发现，实验变暖增加悬浮物的C：P和N：P比，而C：N比不受变暖。温度也是悬浮物化学计量季节变化的主要驱动因素，与C：P和N：P比值呈正相关。浮游植物群落的分类组成之间的温暖和环境的治疗显着不同，表明变暖导致的差异排序的物种从区域池。此外，分类组成也发生了显着变化，在每一个温暖的和环境的治疗，突出了大量的时间营业额的物种。要调查当地的适应是否也发挥了重要作用，在塑造的影响变暖悬浮物化学计量，我们分离出多个菌株的世界性的衣藻，莱茵衣藻从整个温暖的和周围的围隔。我们发现，变暖的分离物具有更高的C：P和N：P比，这些变化的方向和幅度与变暖对悬浮物化学计量的影响相当。我们的研究结果表明，物种分类和当地的适应可能发挥重要作用，在塑造对散装浮游植物化学计量变暖的影响，并表明，在水生生物地球化学的重大转变，预计在一个温暖的世界。
The elemental composition of phytoplankton (C:N:P stoichiometry) is a critical factor regulating nutrient cycling, primary production and energy transfer through planktonic food webs. Our understanding of the multiple direct and indirect mechanisms through which temperature controls phytoplankton stoichiometry is however incomplete, increasing uncertainty in the impacts of global warming on the biogeochemical functioning of aquatic ecosystems. Here, we use a decade-long warming experiment in outdoor freshwater ponds to investigate how temperature-driven turnover in species composition and shifts in stoichiometric traits within species through local thermal adaptation contribute to the effects of warming on seston stoichiometry. We found that experimental warming increased seston C:P and N:P ratios, while the C:N ratio was unaffected by warming. Temperature was also the dominant driver of seasonal variation in seston stoichiometry, correlating positively with both C:P and N:P ratios. The taxonomic composition of the phytoplankton community differed substantially between the warmed and ambient treatments indicating that warming resulted in differential sorting of species from the regional pool. Furthermore, taxonomic composition also changed markedly over the year within each of the warmed and ambient treatments, highlighting substantial temporal turnover in species. To investigate whether local adaptation also played an important role in shaping the effects of warming on seston stoichiometry, we isolated multiple strains of the cosmopolitan alga, Chlamydomonas reinhardtii from across the warmed and ambient mesocosms. We found that warmed isolates had higher C:P and N:P ratios, shifts that were comparable in direction and magnitude to the effects of warming on seston stoichiometry. Our results suggest that both species sorting and local adaptation are likely to play important roles in shaping the effects of warming on bulk phytoplankton stoichiometry and indicate that major shifts in aquatic biogeochemistry should be expected in a warmer world.
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影响因子：
18.3
作者：
Martiny, Adam C.;Pham, Chau T. A.;Lomas, Michael W.
通讯作者：
Lomas, Michael W.
影响因子：
4.5
作者：
Sal, Sofia;Alonso-Saez, Laura;Lopez-Urrutia, Angel
通讯作者：
Lopez-Urrutia, Angel
影响因子：
6.6
作者：
Baselga, Andres;Orme, C. David L.
通讯作者：
Orme, C. David L.
影响因子：
4.9
作者：
Bonachela, J. A.;Allison, S. D.;Levin, S. A.
通讯作者：
Levin, S. A.
DOI：
10.1017/s0025315400014776
发表时间：
1958-01-01
影响因子：
1.2
作者：
MURPHY, J;RILEY, JP
通讯作者：
RILEY, JP